YARN STORAGE DEVICE FOR A TEXTILE MACHINE.

专利摘要:
This invention relates to a yarn storage device (1) for a yarn processing machine having yarn supply spaces (2) and at least one yarn loader (3) movable to a selected yarn supply space (2) to connect an end portion of the yarn supply (14) with an end portion of a external yarn stock, and to add an amount of yarn into said yarn stock space (2) by first winding the yarn (100) onto a winding body (6) and then removing it from the winding body (6) in the wound up state and into the stock space ( 2) add. This invention also relates to a corresponding method and a yarn processing machine equipped with such a yarn storage device.
公开号:BE1019592A3
申请号:E2011/0652
申请日:2011-11-07
公开日:2012-08-07
发明作者:Charles Beauduin
申请人:Wiele Michel Van De Nv；
IPC主号:

专利说明:

YARN STORAGE DEVICE FOR A TEXTILE MACHINE
This invention relates to a yarn storage device for a yarn processing machine comprising at least two yarn supply spaces for storing a yarn supply, a yarn loader provided to be moved to a selected yarn supply space, to connect one end of a yarn supply present in that yarn supply space end of an external yarn stock, and to add a certain amount of yarn to that yarn stock space.
This invention furthermore also relates to a yarn processing machine, in particular a weaving machine, provided with at least one such yarn storage device. Each type of weaving machine is hereby regarded as a yarn-processing machine, such as a double-piece weaving machine, a rod weaving machine, a loop pile weaving machine and a flat weaving machine, but this also applies, for example, to a knitting machine (both a chain knitting machine and a weft knitting machine) and a tree machine.
This invention also relates to a method for replenishing a yarn supply for a yarn processing machine, wherein a yarn supply is provided in at least two yarn supply spaces, and wherein the yarn supply in a selected yarn supply space is supplemented by connecting one end of the yarn in said yarn supply space to one end of the yarn in an external yarn stock and then adding a certain amount of yarn in that yarn stock space.
European patent EP 0 422 093 describes a yarn storage device consisting of a number of juxtaposed yarn storage units in the form of elongated tubes in which yarn in the wound state is stored. Each of these tubes has an open inlet side along which yarn is added to the yarn supply and an open outlet side along which the yarn leaves the tube and is fed to a yarn processing machine. The yarn loader is provided to be positioned on the input side of a selected tube to supplement the supply of yarn in that tube with the desired yarn. Filling is possible without interrupting the fabric production process since new yarn can be added by connecting the free end of the yarn to be added (by knotting or splicing) to the free end of the yarn stock present in the tube.
The filling is done by forming yarn windings in the tube after connecting the yarn ends with the aid of a rotating head. The new windings push the existing yarn stock into the tube.
Practice has shown that this method of winding is not suitable for every type of yarn. Only with yarns of sufficient rigidity and roughness do the windings retain their shape so that the windings fit against each other without the risk of entanglement. For yarns that have a limited stiffness in themselves, or are smoother in structure, this method does not offer a solution because the windings are not nicely shaped or because the windings do not fit nicely against each other, so that when pulling out at the exit side of the tube knots and / or entanglements are formed that can no longer be untangled.
For multi-colored weaving and tufting of carpet, pile warp yarns of different colors must be supplied to the weaving or tufting device. The consumption of these pile warp yarns depends on the design of the carpet and is therefore generally not uniform and not the same for every pile warp thread in the fabric. The yarn storage device must therefore contain a separate yarn supply for each different pile warp yarn. It is known to realize this by supplying the different yarns from respective bobbins placed in a bobbin rack.
Such a bobbin rack must often contain many thousands of bobins and therefore takes up a lot of space, while the total amount of yarn in such a bobbin rack is also considerable. The filling of yarns in the bobbin rack and the exchange of yarns for carpet or velvet weaving machines is still done manually to date: (i) the used bobins must be removed from the rack and new ones introduced; (ii) the thread of the new bobbin must be tied to the previous one and the thread must be inserted into a guide; (iii) finally, the tension must be applied to the wires again by placing weights on the wire. Moreover, wire breaks must also be repaired manually.
The large amount of manual work to be done in a bobbin rack takes a lot of time, making the machine unproductive for a long time. This is very detrimental to the overall profitability of the weaving machine. Moreover, this work represents a considerable wage cost.
It is an object of this invention to provide such a yarn storage device for a yarn processing machine and a method for replenishing a yarn supply for a yarn processing machine that makes it possible to carry out the time-consuming and labor-intensive work in the bobbin rack for a large number of different yarn types. to automate.
These objectives are achieved by providing a yarn storage device having the features indicated in the first paragraph of this description wherein the yarn loader is provided to first wind up the yarn to be added and then remove it from the winding body in the wound state and then add the yarn storage space.
The above objectives are also achieved by providing a method with the features indicated in the second paragraph of this description, wherein the yarn to be added is wound on a winding body and subsequently removed from the winding body in the wound state and added into the yarn supply space .
By first winding the yarns on a winding body, well-formed and stable windings are formed. By introducing these windings against each other into the yarn storage space, they retain their shape so that they fit into the yarn storage space without risk of entanglement. This also applies to smooth and smooth yarns. The yarn can be pulled out of the yarn supply spaces without entanglement or knotting. The yarn storage device and method according to the present invention can hereby be used for practically all types of yarn.
Thereby, it is first possible to wind up the entire amount of yarn to be added and then remove the yarn from the winding body in the wound state. However, we emphasize that the apparatus and method of this invention also provides for yarn to be removed from the take-up body in the wound state and added to the yarn supply space before all the yarn of the amount of yarn to be added is wound. For example, while winding the yarn is still in progress, or during an interruption of winding, it is possible to remove part (one or more yarn windings) of the yarn to be added from the winding body in the wound state. In a possible practical application, for example, the yarn windings on the winding body will gradually be moved towards the end of the winding body. Once the winding body is then provided with yarn windings over its entire length, the front yarn windings will be pushed away from the winding body as additional windings are added afterwards.
In a very preferred embodiment, a respective winding body is associated with each yarn supply space and the yarn loader is provided for winding yarn on the winding body of the selected yarn supply space, and for winding up at least a part of the yarn wound on this winding body in this winding body. so that it is added to the yarn stock.
Since a separate winding body is provided for each yarn supply space, the yarn windings wound up on the winding body do not have to be removed from the winding body after adding yarn. This avoids having to push the windings from the winding body by push means. This reduces the risk of distortion of the shape and the stability of these windings, which in turn further reduces the risk of entanglement or knot formation.
The windings wound on the winding body can remain on the winding body after adding yarn. In an embodiment where the windings wound on the winding body, as new windings are added at a winding location, are moved to an end of the winding body and pushed off, it is also avoided that wrappings must first be placed between the winding location during each filling operation and the free end, before new windings are added to the yarn supply space.
Preferably, a free-end winding body associated with a yarn supply space is positioned opposite the yarn supply.
The final yarn windings of the yarn supply (on its side facing the supply side) can then remain in contact with the first yarn windings located near the free end on the winding body. This contact is also maintained in the periods between two filling operations. This avoids that the last yarn windings of the yarn stock must be retained by retaining elements in these intermediate periods. This also better preserves the shape and stability of the windings, resulting in a lower risk of entanglement or knot.
The yarn loader preferably comprises a holder for holding a removable winding body in a winding position.
In a particularly preferred embodiment, the winding body is designed such that it comprises a winding jacket around an inner space, and an open side along which the above-mentioned holder can be brought into this inner space to hold the winding body in the winding-up position.
The winding sheath can be designed as a substantially closed surface, but can also take the form of two or more elongated strips or fingers spaced apart so that an open structure is formed around the inner space.
In a particular embodiment, the yarn loader comprises a carrier device which is provided to take the winding body of a selected yarn supply space from a rest position in the yarn supply space to a winding position, and to return the winding body, after adding yarn in the yarn supply space, to said winding space. resting position.
In an advantageous embodiment, the carrier device can be provided with at least one movable carrier element, while the winding body is provided with one or more corresponding carrier openings, so that each carrier element can be brought into a recess, behind the last yarn winding, in a carrier opening and substantially along the axis line of the yarn supply space can be moved to move the winding body from the rest position to the winding position, or vice versa. As mentioned above, the contact between the various yarn windings is hereby maintained. The feeding of yarn windings in this way is efficient, simple, easily automated and moreover ensures a good preservation of the shape of the pushed yarn windings.
In another advantageous embodiment, the carrier device may or may not also be provided with a displaceable central winding shaft or holder shaft on which (for example at the end thereof) gripping or attraction means are provided to move the winding body from its rest position to the winding position, or vice versa and in one of those positions.
In the rest position, the winding body is in the passage along which the yarn is added. This passage is largely closed off as a result of which the yarn from the yarn stock is prevented from falling out of the storage space. The winding body thus serves as a closure for the yarn supply space on which the last formed windings are still present.
In each yarn supply space, the take-up body is preferably connected to a fixed part of the yarn supply space such that the take-up body is axially slidable between a rest position where the take-up body is mainly in the yarn supply space, in the passage along which the yarn is added, and a relative winding position axially shifted from the rest position in which at least a part of the winding body (a larger part than in the rest position) is outside the yarn supply space, so that yarn can be wound.
This winding body can for instance be slidably connected to an end piece which is fixedly attached in the feed passage of the yarn supply space, and forms a closing whole with it.
In a preferred embodiment of the yarn storage arrangement, the winding body may be provided with connecting elements (e.g., protrusions or cavities) cooperating with corresponding connecting elements (e.g., cavities or protrusions) of the end piece of the yarn supply space. These connecting elements can ensure that the winding body remains in its rest position after the completion of the filling cycle. The connecting elements preferably comprise elastically deformable parts to ensure positioning and securing of the winding body in the rest position.
For filling, the yarn loader will then grasp the winding body of the yarn supply space to be replenished and move a short distance mainly along the axis of the yarn supply space, just enough to make room for the addition of yarns, by means of the rotating yarn carrier.
The winding body can be held in its winding position by means of a magnetically influenceable element connected thereto which can be attracted by a permanent magnet of the yarn loader. If this magnetic force is the only holding force, it must be greater than the opposing force that is exerted on the winding body during the winding of yarn by the displacement of the yarn. .
Preferably, the yarn loader is also provided for winding an amount of yarn on the winding body while the winding body is with its free end in the yarn supply space, with the new yarn windings being added to the winding body, the yarn windings already present on the winding body being supplied to the free winding body be moved to the end and there removed from the winding body and added to the yarn supply in the yarn supply space.
In a particularly advantageous embodiment, each yarn supply space comprises a positioning means for positioning an end part of the yarn present in the storage space, each winding body comprises a first part of the positioning means, and the positioning means comprises a second part which is fixedly arranged with respect to the yarn supply space, while the winding body is provided to be placed in such a position relative to the yarn supply space that the first and the second part of the positioning means extend adjacent to each other in a mutual position with said end part of the yarn between this first part and this second part is held.
In another embodiment of the yarn storage device according to the present invention, a winding body is not provided for each yarn supply space, but the winding body is a fixed part of the yarn loader.
In a preferred embodiment, the yarn loader comprises at least one push element that is provided for displacing the wound yarn or a wound part thereof on the winding body.
The yarn storage device according to the present invention is preferably provided for partially introducing or holding the winding body into the yarn supply space during the addition of yarn. The yarn is then pushed into the yarn supply space of the winding body.
The yarn loader preferably comprises at least one push element which is provided for displacing a wound part of the yarn in the axial direction on the winding body.
Moving the yarn windings is best, but not necessarily, during winding up the amount of yarn to be added, for example, to free up space on the winding body for winding up additional yarn.
In a very preferred embodiment, each pushing element is provided to exert a substantially axially directed pushing force on the yarn. It is then preferred that each pushing element is provided for displacing the yarn windings wound up on the winding body by pushing against the yarn of the last wound yarn winding.
As a result, it is possible to move the already wound yarn windings in order to make room for the next yarn winding (s) on the side of the winding body where yarn windings still have to be added. This is possible while the further winding is in progress or during a short interruption of winding up.
In an advantageous embodiment, the yarn loader comprises two or more pushing elements which are provided to push against successive parts of the yarn of the last wound yarn winding at successive times. This makes it possible to push against the last-wound yarn each time during the winding to move the coiled yarn. As a result, the last wound yarn is pushed several times per yarn winding so that the yarn windings are easily displaced as yarn windings are added to the winding body and so that the last wound yarn always fits well with the previous yarn windings and these yarn windings also almost continuously, or at least with minimal intervals, moved on the winding body.
The different pushing elements are preferably arranged at uniform intervals along the winding surface of the winding body. This has the advantage that the yarn is damaged less because several parts of the winding are pushed forward. Each pushing element can, for example, come into action during each winding tour. Each pushing element then preferably has a pushing cycle which has a fixed phase shift relative to the winding cycle. A phase shift of about 180 ° between first contact of a part of the yarn on the winding body, and the maximum pushing of this part of the yarn is preferred.
For example, each push element can perform an axial movement that can be described as a sinusoidal movement.
In another preferred embodiment, the yarn loader is provided with a winding body which defines a wrapping surface for the yarn and comprises a free end along which the wound yarn can be slid off the wrapping surface, while the transverse dimensions of the wrapping surface decrease in the direction of said end. As a result, the yarn windings can easily slide off the winding body. The winding body, for example, has a slightly conical shape. By the term transverse dimensions we mean the diameter of the enveloping circle in a section perpendicular to the longitudinal axis of the winding body. A winding body has a diameter of about 25 to 75 mm. for the defined circle of cross sections perpendicular to the central axis. This diameter is preferably approximately 35 mm. or 45 mm.
Components that come into contact with the yarn, such as the winding body, lead-through elements, and guide elements for the yarn, are preferably made at least partially in a wear-resistant material, such as ceramic or hardened metal, or possibly have a suitable wear-resistant cover layer. Additionally or alternatively, at least the surface that comes into contact with the moving yarn can also be provided with a coating that, or manufacture from a material that reduces the frictional resistance between the surface and the yarn. One particular material or one particular cover layer can also both increase the wear resistance and reduce the frictional resistance.
The winding body is preferably embodied such that the winding surface is interrupted by at least two recesses extending along the axis of the winding body. In another embodiment, the winding body comprises a core and at least two ribs extending radially from the core with intermediate recesses, while the end faces of said ribs form the winding surface for the yarn.
Said recesses can be used for the displacement of push elements to push the wound yarn away from the winding body, as further explained in this description.
These recesses can alternatively also be provided for the movement and positioning of the winding body, if this winding body is a separately removable part of each yarn supply space.
The yarn storage device according to this invention preferably comprises a yarn carrier which is rotatable around the winding body, so that a yarn carried by the yarn carrier is wound onto the winding body by the rotational movement of the yarn carrier.
The winding body preferably remains stationary during winding up. The yarn carrier can in an advantageous embodiment be supported by a rotor that is concentrically rotatable around the winding body, and is, for example, designed as a feed-through eye.
In a special embodiment this device comprises at least one pushing device which is provided for pushing a quantity of yarn wound on the winding body away from the winding body while retaining the yarn windings.
In an advantageous embodiment, the pushing device can then be provided with at least one pushing element which is displaceable in a recess of the winding body extending along the axis.
This embodiment makes it possible, inter alia, for pushing means to be introduced into the said recesses behind the last yarn winding and to be moved in these recesses towards the end of the winding body in the direction of the axis of the winding body. As a result, the pushing means push at least two different places against a final yarn winding so that this yarn winding and all preceding yarn turns are carried along by the pushing means. Pushing yarn windings in this way is efficient, simple, easily automated and moreover ensures that the shape of the pushed yarn windings is well maintained.
In a possible embodiment of the yarn storage device according to the present invention, each yarn supply space comprises a passage along which the yarn is added, and a retainer with at least one restraining element extending in the passage or in the vicinity of the passage such that the passage is reduced such that the passage in the yarn stock space yarn yarns are held in the yarn stock space.
Each weather container comprises, for example, at least one retaining element which, by exerting a pushing force in the insertion direction on it (this is the direction in which the winding body is introduced into the yarn supply space), is movable, hinged against a spring force or a force exerted by the yarn already present. or is elastically deformable so that at least a portion of the winding body of the yarn loader can be brought into the yarn supply space, each restraining element springing back, displaced or pivoting back after the said pushing force has disappeared, to a position where it holds the yarn windings in the yarn supply space.
The weather container comprises, for example, one or more resilient lips or a row of bristles that spread around the edge of the passage and / or which extend from this edge in the direction of the axis of the yarn storage space and in this way prevent the yarn from coming out of the yarn storage space. The passage can easily be released for adding yarn, for example because the winding body must be partially introduced into the yarn supply space, by deforming these elastically deformable retaining elements. The restraining elements deformed by the winding body must further deform to a position remote from the winding body to allow the yarn to pass when the yarn on the winding body is moved beyond the restraining elements. This also applies if the yarn is pushed past these restraining elements during the pushing of a yarn supply present on the winding body.
Preferably, each yarn supply space also comprises a fixedly positioned positioning means for positioning an end portion of the yarn present in the yarn supply space.
In a preferred embodiment, the positioning means is provided such that a yarn extending between the yarn supply and the yarn carrier can be brought into association with the positioning means by rotation of the yarn carrier.
Thus, with simple means, it can be ensured that the end of the yarn supply is automatically available at a fixed location for each subsequent yarn supply after each yarn supply. The positioning means preferably comprises a holding means for holding the yarn in a fixed position.
The positioning means is preferably provided in such a way that a yarn extending between the yarn supply and the yarn carrier, only if the rotation of the yarn carrier has a direction of rotation that is opposite to the winding-up direction, can be brought into cooperation with the positioning means. This avoids the risk that the yarn is retained by the positioning means during winding.
In the embodiment in which a separate winding body is provided for each yarn supply space, said positioning means preferably cooperates with a provision on the winding body to clamp the thread end of the yarn stock in a fixed position when the winding body after adding yarn to the stock, is returned to its resting position by the yarn loader.
The transverse dimensions of the winding body are preferably well matched to the inner dimensions of the yarn supply space. The diameter of the winding body will best be matched to the diameter of the inscribed circle in the cross-section (perpendicular to the longitudinal axis) of the yarn supply space.
The yarn itself must still be able to pass along the retaining elements. As a result, the yarn windings removed from the winding body fit nicely against the wall of the yarn storage space, so that the stability is even better.
It is also possible to obtain yarn windings that fit as closely as possible to the walls of the yarn supply space so that the yarn is wound on the winding body at a location outside the yarn supply space, for example with the aid of a yarn carrier that rotates at a diameter larger than the diameter. of the inscribed circle in the cross-section of the yarn supply space.
In a most preferred embodiment, the device according to the present invention comprises a programmable control unit which is provided, on the basis of pre-entered data and / or received signals from detection means provided for this purpose, to automatically determine a sequence of yarn supply spaces in which yarn must be added, and to automatically move and control the yarn loader to perform yarn addition in accordance with this sequence.
This invention also relates to a yarn processing machine, more particularly a weaving machine, a tufting machine, a knitting machine or a tree machine, provided with at least one yarn storage device with one or more of the characteristics described above.
Optionally, several yarn loaders can be provided per yarn storage device and thus also per yarn processing machine such as, for example, a weaving machine to enable yarns to be added at a higher speed (several yarn supply spaces simultaneously) into a series of yarn supply spaces.
A tandem arrangement with at least one yarn storage device and at least one platform with multiple yarn loaders (two or more) moving together is also possible. The yarn loaders then have a fixed position relative to each other and are movable together by a common x-y movement system.
Certain types of weaving machines, such as double-piece weaving machines, require a yarn tension and recovery module for proper operation. The yarn then runs from the yarn storage device (s), for example through a number of flexible tubes, to the yarn tension and recovery module and from there to the weaving machine.
Preferably, the winding body, before or during the addition of yarn, is introduced at least partially into the yarn supply space. More preferably, the winding body is passed past the retaining elements before or during the addition of yarn with the free end.
Even more preferably, the winding body is brought into that position (at least partially in the yarn supply space or with the free end past the retaining elements) before or during winding and adding yarn. The yarn is then preferably also pushed into the yarn storage space of the winding body.
In a preferred method according to the present invention, the yarn is wound on the winding body at a location outside the yarn supply space.
When winding the yarn, a rotatable yarn carrier (such as, for example, a feed-through eye) must describe a circular path around the winding body. For this purpose, there must be sufficient free space around the winding body. By winding the yarn at a location outside the yarn supply space, no free space has to be provided for this in the yarn supply space, as a result of which the free space between the walls of the yarn supply space and the winding body can be kept very limited. The winding body can hereby be embodied with transverse dimensions that closely match (only slightly smaller than) the transverse dimensions of the yarn supply space. Said cross dimensions are preferably the envelope circle of a cross-section (perpendicular to the longitudinal axis) of the winding body, respectively the inscribed circle of a cross-section (perpendicular to the longitudinal axis) of the yarn supply space. The diameter of the enveloping circle of the winding body is best matched to the diameter of the inscribed circle in the cross-section (perpendicular to the longitudinal axis) of the yarn supply space. The yarn itself must also be able to pass along the retaining elements. As a result, the yarn windings removed from the winding body fit nicely against the wall of the yarn supply space. It is also possible to obtain yarn windings that fit as closely as possible to the walls of the yarn supply space that in the method according to the invention the yarn is preferably wound onto the winding body at a location outside the yarn supply space.
As a result, the yarn is added to the yarn supply space in the form of yarn windings that are only slightly smaller than the diameter of the supply space. These yarn windings are better held in their upright position by their contact with the walls of the yarn supply space. This results in a yarn stock consisting of stable yarn windings. The risk of the yarn windings falling over, resulting in knotting or entanglement of the yarn, is therefore very limited.
Moreover, by winding the yarn outside the yarn supply space, there is also a better view of the winding, which facilitates quality inspection.
In this method, the wound yarn is preferably moved on the winding body as further yarn is wound. This allows the yarn to be continuously wound up in the same place (hereinafter referred to as the winding location) of the winding body. By moving the coiled yarn in each case, space is continually released on the winding body at that winding location during further winding. By winding up at a fixed winding location, the winding mechanism (e.g., the yarn carrier) does not have to be moved along the axis of the winding body.
If a weather container is provided at the feed opening of the yarn supply space to retain the yarn in the yarn supply space, the passage through this weather container must of course be taken into account when determining the transverse dimensions of the winding body. In particular, the passage between the displaced or deformed restraining elements must be taken into account. In this connection, account must also be taken of the fact that the yarn must also be able to pass beyond these retaining elements while it is being moved onto the winding body.
In the device and method according to the present invention, the yarn is preferably wound onto the winding body in such a way that the yarn windings are substantially adjacent to each other. The wound yarn can be spirally wound and comprise a series of consecutive and substantially adjacent yarn windings.
In a particularly preferred method, one proceeds in such a way that the wound yarn, as a result of said displacement, is pushed off the winding body and is added to the yarn supply space and thereby pushes forward the yarn supply present in the yarn supply space. This is, among other things, the case with the addition of relatively large amounts of yarn, in which the winding body contains yarn windings over its entire length and the front yarn windings are pushed away from the winding body as the wound windings are moved further in order to be able to add additional windings at the end.
The invention will now be further elucidated with reference to the following more detailed description of a possible embodiment of a yarn storage device according to the present invention. The device described is only an example and can therefore in no way be regarded as a limitation of the scope of protection or of the scope of the invention. In this detailed description, reference numerals refer to the accompanying figures, of which
Figure 1 is a perspective view of a movable yarn loader on the supply side of the yarn supply tubes of a yarn storage device;
Figures 2 to 7c show a first embodiment of a winding unit with adapted yarn supply tube, of which
Figure 2 represents the head of a take-up unit of a yarn loader in perspective;
Figure 3 is a perspective view of an end piece provided at the supply end of each yarn supply tube in which there are a number of yarn windings;
Figure 4 is a plan view of a take-up unit, the take-up body of which is partially located in a yarn supply tube during the take-up and addition of a yarn supply;
Figure 5 is a perspective view of a positioning element provided at the supply end of each yarn supply tube to position the end portion of the yarn supply;
Figure 6 is a top plan view of a take-up unit with the associated pusher device with movable pusher pins;
Figures 7a, 7b and 7c each show, in top view, the front part of a take-up unit, while the corresponding push pins on these figures 7a, 7b, 7c are represented in successive phases during the pushing of yarn windings wound onto the take-up body;
Figure 8 is a schematic cross section of a tension and recovery device for the yarn supply to a weaving machine;
Figure 9 represents a side view of a yarn loader according to the present invention
Figures 10a and 10b represent a perspective view and a side view, respectively, of a portion of the yarn loader of Figure 9 during its operation; Figure 11 shows an advantageous embodiment for the pushing elements of the device.
Figures 12 to 17 show a second embodiment of the winding unit with the associated yarn supply tube, of which • Figure 12 represents a cross-section of the yarn loader and a removable winding body in the winding position; ; Figure 13 represents a cross-section of the yarn loader and a removable winding body with respect to an end piece of a yarn supply tube, the winding body being represented in the rest position and the winding position; Figure 14 shows an assembly of end piece and a removable winding body in the rest position; Figure 15 represents the winding portion of a winding unit, with a removable winding body in its winding position on the central axis and without yarn windings; Fig. 16 represents the winding portion of a winding unit, with on the central axis a winding body placed in the winding position on which a series of yarn windings are wound; Fig. 17 shows a side view of a yarn loader and the winding body positioned in the winding position, relative to the end piece of a yarn supply tube, during winding of yarn.
The yarn storage device shown in the figures is used for supplying different yarns to a yarn processing unit, such as a weaving machine. This device is particularly suitable for storing different yarns with uneven consumption in the yarn processing unit. The yarns provided in the yarn storage device are, for example, the pile yarns for a weaving machine for weaving pile fabrics.
An external yarn stock is available for every different type or color of yarn, for example in the form of one or more bobbins with a large amount of that yarn. The different yarns (yarn types and / or yarn colors) are introduced into a number of yarn supply tubes by means of one or more movable yarn loaders. Depending on the yarn consumption, the yarn in these yarn supply tubes is automatically replenished.
Optionally, means can be provided for automatically replacing a certain external stock with another external stock with yarn of a different type and / or color. These means then comprise cutting means for cutting through the yarn fed from the one external supply, and positioning and connecting means for connecting an end portion of the new external supply with an end portion of the yarn fed to a yarn loader. These means are preferably controllable automatically on the basis of data concerning the yarn types that must be supplemented in the yarn storage spaces in order to be able to meet the anticipated yarn consumption of the yarn processing machine.
The number of yarn supply tubes essentially corresponds to the number of colors that one wishes to have available at a given position in the width seen in the fabric multiplied by the number of positions where one wishes to add the yarns in this way. For a machine for weaving pile fabrics, this number can normally correspond to the number of bobbin spindles traditionally provided for the pile yarns.
Figure 1 shows an arrangement of a yarn storage device (1) according to the invention. This comprises a number of yarn supply tubes (2) of equal length and with a diamond-shaped cross-section that are grouped in a plurality of rows of superimposed storage housings (2) into a substantially rectangular assembly. The different storage houses (2) lie against each other or have common partitions. At the front end, each yarn supply space has a supply opening (2a) through which the yarn supply can be replenished. At the rear end, each storage space (2) has a drain opening.
The ends of these storage housings (2) are always in the same plane.
The yarn supply tubes (2) are arranged inclined so that their yarn supply openings (2a) are lower than their yarn discharge openings. On the side of the yarn feed openings (2a) a yarn loader (3) is arranged on a platform that can be moved by an x-y movement system. The height position of the yarn loader (3) is determined by a first pinion gear rack drive (4a) wherein the gear rack is connected to a vertical profile (5a) and the pinion gear is driven by means of an electric motor-gearbox combination.
The horizontal position of the whole including profile is determined by means of a second pinion gear rack drive (4b), the gear rack being fixedly connected to a horizontal profile (5b) that forms part of the frame of the yarn storage device.
The winding unit (31) of the yarn loader (3) comprises a fixed winding body (6) with a slightly conical shape on the front side. From its base, the winding body has a gradually decreasing transverse dimension in the direction of the free end (7) (see Fig. 2 and Fig. 6), to finally switch to a more beveled portion up to the free end. The winding body (6) has a core (8) and a number of ribs (9) radially projecting from that core (8) with intermediate recesses (10) extending along the longitudinal direction of the winding body (6) and opening at the front free end of the take-up body. The end faces of the ribs (8) form a winding face on which the yarn (100) is wound.
A winding body has a diameter of about 25 to 75 mm. for the defined circle of cross sections perpendicular to the central axis. This diameter is preferably approximately 35 mm. or 45 mm.
The winding unit (31) further comprises also an annular rotor (11) that is rotatable concentrically about the fixed winding body (6). The rotor (11) comprises a feed-through eye (11a) through which the yarn (100) to be wound extends.
A series of push elements (12) are arranged in a concentric circle around the base of the winding body (6). Each push element (12) can be driven by a (not shown) drive device to move back and forth in the direction of the axis of the winding body (6) between a front position and a rear position, hereinafter the push position and the withdrawn position.
Due to the rotation of the feed-through eye (11a) that carries the yarn (100), yarn is wound onto the winding body (6). Figure 2 shows the yarn windings on the winding body (6). Every new yarn winding is placed on the conical winding body in virtually the same place. This location is further referred to in this description as the winding location. The push elements (12) are in their retracted position behind this winding place. In the push position, each push element (12) is located a little further than this winding location so that each push element (12) can carry out a forward push movement whereby the yarn of the last added winding is shifted, and thus also the whole of windings on the winding body (6) is advanced in the direction of the free end (7) of the winding body (6).
The push elements (12) are driven according to a push cycle, the push elements performing a push movement in successive order of their arrangement in the circuit. This pushing cycle follows the winding cycle with a small delay, whereby a pushing element (12), for example, always carries out a pushing movement at the moment that the feed-through eye (11a) with the yarn (100) is diametrically opposite the location of the pushing element (12).
The push elements (12) do not rotate around the winding body, but each make a rocking movement in a plane that intersects the axis of rotation (11b) of the rotor (11). The pushing elements (12) are, for example, mounted (see Fig. 11) on a bearing (99) that is inclined with respect to the axis of rotation of the rotor (11), and whose inner ring (99a) rotates with the feed eye (11a) ) about the same axis of rotation.
The wound yarn (100) is gradually moved to the free end (7) and is eventually pushed away. Due to the slightly conical shape of the winding body (6), this shearing operation is facilitated by the pushing elements (12).
The push elements (12) move in the recesses (10) mentioned above. Space is also provided in these recesses (10) for the push-off pins (22) of the push-off device (21) which is further discussed in this description.
At the position where the next length of the yarn (100) is applied through the feed-through eye (11a) (referred to above as the fixed winding location), the winding body (6) has steeply rising flanks in the direction of the rotor (11). The newly wound yarn first lands on these flanks and is guided downward on it, so that the yarn eventually ends up on the conical portion of the winding body (6) at the said winding location.
At least where the next yarn length is added, the push elements (12) are in the retracted position away from the free end (7) of the winding body (6). The above described pushing movement through the pushing elements (12) thus takes place after this yarn length has been positioned by the aforementioned flanks on the slightly conical part of the winding body (6).
The yarn supply opening (2a) of each yarn supply space (2) is provided with a separate end piece (13) which is provided to hold the yarn supply (14) in the yarn supply housing (2) while also adding a further amount of wound up yarn. Figure 3 shows the end piece (13) in the situation after completion of a replenishment operation in a yarn supply tube: the yarn supply (14) is completely behind the flexible leaf springs (15) which are bent inwards in the direction of the yarn delivery side . The end portion (16) of the yarn supply (14) is located in a positioning element (17) which is mounted at the height of the outer edge of the yarn supply tube (2). This positon element (17) is provided to keep the end portion (16) of the yarn supply (14) available in a fixed position for a subsequent replenishment operation and is further described in more detail with reference to Figure 5.
The end piece (13) also has one or more lateral openings (18) which provide a passage for the push pins (22) of the push device (21). This allows the yarn windings present on the winding body (6), after winding up the desired amount of yarn, to be pushed past the leaf springs (15) by these push pins (22). In this push operation, these push pins (22) also move in the lateral openings (18) of adjacent yarn supply housings (2).
During the addition of yarn in a yarn supply tube, the winding body (6) and the feed eye (11a) with associated drive are in the position shown in Figure 4. The drive of the rotor (11) of the feed eye (11a) takes place via a Servo motor, more specifically this can be a permanent magnet motor.
The feed-through eye (11a) is outside of the yarn supply tube (2) and the front portion of the winding body (6) is in the yarn supply tube (2). However, the yarn is wound onto the take-up body (6) on the portion of the take-up body located outside this yarn supply tube (2). During further winding, these windings are pushed in axial direction by the pushing elements (12) to the part of the winding body (6) which is located in the yarn supply tube (2), where these windings are finally pushed away from the winding body (6) and end up in a wound state in the yarn supply tube (2).
Figure 4 shows the position in which the feed-through eye (11a) carrying the yarn (100) is on the unseen underside; on that underside, the (not visible) push elements (12) are removed from the last laid yarn winding so that a place is created for the next winding; on the top side of the feed-through eye (11a) it is seen that the pushing elements (12) do press against the previously laid winding and this winding (and the complete package of windings on the winding body) thus shift in the direction of the free end (7) of the winding body (6).
Figure 11 shows a preferred embodiment for driving the push elements (12). The pushing elements (12) are connected to each other and can only move in a plane that runs through the axis of rotation (11b) of the rotor (11). The pushing elements are rocked by being mounted on a bearing (99), whose point of mass inertia lies on the axis of rotation (11b) of the rotor (11), and whose central axis is inclined with respect to the axis of rotation of the rotor (11), but whose inner ring (99a) is connected to parts that move around the central axis of rotation (11b) of the rotor (11).
Figure 5 shows the aforementioned postionating element (17) in detail. It is a filamentary element (17) that is bent so that a partially enclosed and laterally accessible loop opening (19) is formed, so that the yarn can be introduced laterally into the loop opening and into a curvature (20) of the filamentary element (17) held in a fixed position.
If the yarn (100) extending between the yarn supply (14) and the feed-through eye (11a) is taken along with a rotational direction opposite to the winding-up direction, the yarn (100) enters laterally through the open side of the loop opening (19). loop opening (19) and is retained in said curvature (20). If the yarn (100) is rotated with the winding turn line during the winding process, it cannot end up in the loop opening of the positioning element (17) because the yarn then approaches the loop opening (19) from the side where this loop opening (19) is not accessible. Therefore, undesired retention of the yarn (100) during its winding cannot occur.
The fact that the loop opening (19) is only accessible at a twist direction that is opposite to the take-up turn is therefore utilized to briefly rotate the yarn at the end of the take-up cycle in the reverse turn sense (opposite to the take-up turn) so as to bring the positioning element (17) and position it in a fixed point of the yarn supply tube (2). The yarn is then cut, leaving an end portion (16) of the yarn supply (14) in the positioning element (17). The yarn loader (3) is then moved to a further yarn supply tube (2) to be completed.
The yarn supply tubes (2) to be supplemented and their order are determined by a programmable control unit (not shown) on the basis of input control data and / or on the basis of a calculation of available yarn supply and anticipated yarn consumption per yarn supply tube, and / or on the basis of detection signals of detectors provided for this purpose (not shown). Such detectors detect, for example, when the amount of yarn in a yarn supply has fallen below a certain minimum.
Figure 6 shows the lead-through eye (11a) and its drive in top view. You can clearly see the winding body (6) and in addition the movable pusher pins (22) of the pusher mechanism (21) with its associated drive provisions, in particular pneumatic cylinders which ensure the different movements of the carrier pins (22).
Figures 7a, 7b and 7c show three different positions of the push pins (22) during their operation. Figure 7a shows the rest position of the mechanism, for example, during the winding of yarns on the winding body (6).
In the situation of Fig. 7b, the push pins (22) are moved radially towards each other in the direction of the axis of rotation of the rotor (11) of the lead-through eye (11a), so that these push pins (22) with their ends in the recesses (10 ) have entered the winding body (6), behind the yarn windings still to be pushed from the winding body (6).
Figure 7c shows the situation in which the push pins (22) are displaced in the direction of the axis of the winding body (6), up to the free end (7) of the winding body (6). This is the movement carried out to push the last part of the amount of wound up yarn from the winding body (6) into the yarn supply tube (2) past the bent leaf springs (15).
An embodiment of a tension and recovery system (23) associated with this yarn storage device (1) is shown in section in Figure 8. This system is required in the case that the yarn-processing machine processes yarns under tension and by shedding, such as, for example, weaving machines for weaving pile fabrics, more specifically double-piece weaving machines, rod weaving machines and loop pile weaving machines.
The arrows A and B (see Figure 8) indicate the direction in which the yarn moves net, although a recurring movement can also be detected temporarily in position A, together with the recovery due to the shedding mechanism. In position B, the yarn arrives from the yarn storage device, possibly guided in guide tubes (not shown). In position A the yarn continues in the direction of the yarn processing machine, for example a weaving machine, tufting machine, knitting machine or tree machine.
The voltage and recovery system (23) must be provided with a voltage system with one or more voltage elements, each time supplemented with a recovery element; The tension element consists of a combination of two dish-shaped elements (24) between which the yarn runs (see figure 8) and wherein an adjustable compression spring (25) provides for the tension build-up. Other stress-building systems such as leaf springs that push the yarn against a solid surface, weights, pneumatic pistons, or magnetic elements are also eligible for this. The recovery element here is a lever (27) which, with the aid of an adjustable torsion spring (28), temporarily recaptures the amount of yarn (100) that returns as a result of shedding. The torsion spring (28) can be adjustable to shift its equilibrium position or to change its stiffness. As a recovery element, it is also possible to work with a weight, via a pneumatic piston, or with the aid of a magnetic element.
Preferably a number of these voltage and / or recovery elements can be controlled in groups. For the tension system (24, 25), this is provided by lengthwise adjusting the compression springs (25) of a group of tension elements (24) by means of a common control profile (26). In a leaf spring system, the point of attachment of the leaf springs may be provided on a common shaft that can be rotated to obtain a desired tension. For the recovery system (27, 28) this is provided by adjusting the positions of the similar ends (29) of the torsion springs (28) in a group of recovery elements about the central axis (30) on which the torsion springs (28) to sit.
Figure 9 shows all components of the yarn loader (3) in connection with the platform that can be moved with the aid of the X-Y movement system, opposite an end piece (13) at the yarn feed opening (2a) of a yarn supply tube (2) selected by the control program.
These components include a take-up unit (31) with take-up body (6), push elements (12), yarn feed-through eye (11a) and the pusher mechanism (21) attached to this take-up unit (31). In addition, these components also include a yarn feed module (32) with a feed eye (33), a feed tensioner (34), a blow-back unit (35) (such as, for example, a venturi unit) to blow the yarn back in the direction of the external yarn stock , a feed-recuperation cell (36) that can hold the blown-back amount of yarn, via a number of circumferences around one or more weights or resilient elements, so that it does not confuse, and also a controlled feed clamp (37). This assembly of winding unit (31), push mechanism (21) and yarn supply module (32) is also movable relative to the platform in a direction C (see arrow on figure 9) along the longitudinal direction of the yarn supply tubes (2). This direction is substantially perpendicular to the plane of the X-Y movement, so that the winding body (6) can move in and out of the selected yarn supply space (2). In a variant embodiment, the yarn supply module (32), or only the supply tensioner (34), can be fixedly mounted on the platform using the X-Y movement system, so that they can only be moved according to the movement of the X-Y movement system. This variant embodiment requires that less yarn has to be recovered by the feed recovery cell (36) so that it can be more compact and less complex.
The other components carried by the platform on which the yarn loader (3) stands are: • a connecting unit (38), in this case a knot unit, provided with the necessary detection means, • two associated yarn grippers, a front yarn gripper (39) and a rear yarn gripper (40), • a waste remover (41), which sucks in the yarn ends cut off after tying and removes them to a collection point (42).
• a suction unit (43) that can be moved back and forth in the direction indicated by arrow D to suck the end part (16) of the yarn into the yarn supply (14) and to keep it stretched, and • a cutting and clamping unit ( 44), which, after the yarn supply has been terminated in a yarn supply tube (2), cuts the yarn (100) still connected to the external yarn supply and holds the yarn end connected to the external yarn supply.
Figures 10a and 10b show the principle of connecting the external yarn supply with the yarn supply (14) of the yarn supply tube (2) selected by the control program. In a specific embodiment, the end parts of these yarns are knotted together, with the aid of an automatic knot unit (38). This knot unit can make connections in which the end parts of yarns to be connected lie in the same direction or in the opposite direction before connection. Typical nodes are single and double weaver node, fisherman's node, or other nodes. Instead of a button device, it is also possible to use a splice unit. This connects the yarns by blowing the two assembled end parts through a high pressure air blast, so that the fibers of both yarns are intertwined.
A typical cycle for introducing yarn into a yarn supply tube (2) comprises the steps described below: 1) The platform on which the yarn loader (3) stands is moved to a next position to complete the filling cycle of the yarn supply tube (2) selected according to the control program. to start; 2) The suction unit (43) moves on a straight guide to the positioning element (17) of the selected yarn supply tube (2) and sucks at its suction opening (45) the end part (16) of the yarn stock (14) contained therein and attracts the yarn along a short distance in a direction opposite to the direction indicated by the arrow D in figure 9; 3) The front gripper (39) takes the yarn end part (16) between the positioning element (17) and the suction opening (45) of the suction unit (43), and displaces it, for example by means of a rotary movement, by means of a pneumatic or electric motor so that a yarn length originating from the previously present yarn supply (14) is pulled out of the yarn supply tube (2) and placed in the connection unit (38). The end part of the yarn coming from the external yarn stock is meanwhile still ready in the connection unit (38), since it is positioned here at a previous yarn supply cycle (see below); 4) The clamping element of the cutting and clamping unit (44) is opened, and the clamping element of the front gripper (39) is opened; 5) In the connection unit (38) the two yarns are connected, while the waste from this connection operation is sucked away by the waste remover (41), which consists, for example, of two suction lines which, after tying a node, suck in the yarn parts cut from this node and removing to the collection point (42); 6) The blow-back unit (35) is actuated and it sucks in the wire so that it becomes taut. (The yarn windings present in the yarn supply tube (2) are hereby not sucked out of the storage space by being pressed against the leaf springs (15) of the end piece (13). This pressure is obtained by the inclined arrangement of the yarn supply tube (2) combination with a pressure element (not shown) provided on the outlet side of the present yarn supply (14), which presses against the yarn supply (14) by the action of gravity of a sliding or rotating element abutting against this pressure element, such as a ball; 7) The yarn loader is moved until the winding body (6) is aligned with the selected yarn supply tube (2); 8) The connection unit (38) is again prepared for a subsequent connection operation; 9) The rotor (11) rotates the feed eye (11a) in the take-up turning line, until the feed eye (11a) is at the top; 10) The take-up unit (31) is inserted with the front part of the take-up body (6) into the end piece (13) of the yarn supply tube (2) so that the slightly conical part of the take-up body (6) passes beyond the contact with the winding body (6) elastically deformed leaf springs (15) protruding in the direction of the discharge side of the yarn supply tube (2).
11) The supply terminal (37) is closed and the blow-back unit (35) is deactivated.
12) The yarn is pulled from the positioning element (17) by rotating the feed eye (11a) into the winding turn line, until this feed eye (11a) is back in the lower position, after which the feed clamp (37) is opened again.
13) The anticipated amount of windings is now first wound onto the winding body (6) by rotating the feed-through eye (11a) according to the winding-up direction. With this rotation, the yarn cannot possibly enter the positioning element (17). This winding takes place outside the storage space (2). The yarn windings are moved on the winding body (6) up to the part that is in the yarn supply tube (2). ; after all, during the build-up of the yarn supply, the pushing elements (12) always push the last laid parts of the yarn winding forward so that they come to rest against the previous windings and so that the wound up stock is pushed forward in the direction of the free end (7) of the winding body (6). During the winding, the yarn is supplied from the external yarn supply via a supply tensioner (34) which supplies the correct tension for laying the windings; this supply tensioner (34) can optionally be controlled in function of the properties of the yarn to be supplied (100). Thereafter, the yarn fed passes through the winding unit (31), first running along the central axis of rotation of the lead-through eye (11a) and then deflecting in an oblique channel and running to the lead-in eye (11a).
14) After laying the desired amount of yarn, the push pins (22) of the push mechanism (21) are moved radially towards each other in the direction of the central axis of the take-up body (6), by means of a pneumatic piston or via a linear motor. The push pins (22) thus extend beyond the last laid winding, into a recess (10) in the winding body (6) 15) The push pins (22) then move axially in the longitudinal direction of the winding body (6) towards the free end (7) and push the windings still present on the winding body (6) away from the winding body. These yarn windings are thereby pushed past the leaf springs (15) of the end piece (13) which is located on the supply side of the yarn supply tube (2). This is possible because the push pins (22) can be moved in a respective lateral opening (18) of the end piece (13) beyond these leaf springs (15) (see figure 3).
16) After applying the blow-back device (35), the feed-through eye (11a) is rotated in the direction of rotation that is opposite to the winding-up direction to just beyond the upper position of the feed-in eye (11a). Partly due to the location of the windings already pushed and retained by the push pins (12), the yarn (100) which extends from this yarn supply to the feed-through eye (11a) becomes, by this rotation, in the loop opening (19) of the positioning element (17) ).
17) After this, the blow-back device (35) is deposited, the push-off pins (22) are moved back to their original position, first being moved backwards axially, against the yarn feeding direction, and then back away from the axis of the winding body ..
18) The winding unit (31) and the fixedly connected components now move away from the yarn supply tube (2) again, while the yarn remains in the positioning element (17). The feed-through eye (11a) now rotates further with rotation direction opposite to the winding rotation direction so that the yarn comes to lie just above the connection unit (38) accessible from above.
19) The yarn loader (3) then moves upwards, so that the yarn ends up in the cutting and clamping unit (50). The rear yarn gripper (40) grabs with its clamping element the yarn that extends between the yarn supply tube (2) and the lead-through eye (11a) and prepares the yarn in the connection unit (38).
20) Thereafter, the yarn is cut and the portion connected to the external yarn supply is clampedly retained in the clamping element of the cutting and clamping unit (44).
To realize a first filling of such a system, a number of steps must be adjusted since no yarn supply end (16) is available in the positioning element (17).
The following actions must be taken: a) The platform on which the yarn loader (3) stands is moving until the winding body (6) is aligned with the yarn supply tube (2) to be filled; b) the feed-through eye (11a) is rotated to its upper position; c) the clamping element of the rear yarn gripper (40) is opened; d) an elongated object with a hook or eye is passed from the yarn discharge side through the empty yarn supply tube (2) so that the hook or eye protrudes on the supply side of the yarn supply tube (2).
e) The yarn is pulled out of the clamping portion of the cutting and clamping unit (44) and secured in the hook or eye.
f) the elongated object is then pulled out of the yarn supply tube (2) and the yarn end is laid beyond the discharge side of the yarn supply tube (2); g) The pressure element and the associated adjacent sliding or rotating element (see above) are introduced into the yarn supply tube (2) on the discharge side and brought up to the leaf springs (15); h) the yarn is then stretched on the discharge side and the winding unit (31) is moved until the winding body (6) is in its winding position in the yarn supply tube (2); i) the operations described above in actions 13 to 20 can now be performed in the normal operating sequence.
The embodiment of Fig. 12 and following shows a yarn loader (3) and the associated parts, the winding body (106) being designed as a sleeve-shaped element with a closed side (106a) and, following the peripheral edge of this closed side (106a) and distributed over this circumference, a number of fingers (106b) which together form a winding jacket around an inner space, and opposite this closed side (106a) an open side along which said inner space is accessible between the fingers (106b).
The winding unit (31) of the yarn feeder (3) comprises on its winding shaft a holder (53) which extends through the open side in said inner space, so that the winding body (106) is carried by the holder (53). The winding body (106) is here in the winding position (II). The winding body (106) is movable from this winding position (II) to a rest position (I) wherein the winding body (106) is connected to an end piece (113) of a yarn supply tube (2), as further described with reference to Figure 13.
In the figures, the winding body (106) is represented in the rest position and the winding position and these positions are indicated by a dashed line (I), (II) which is in line with the closed side (106a) of the winding body. In this patent application, the reference (I), (II) of these dashed lines is also used to refer to the rest position (I) and the winding position (II) itself. In this embodiment, the pusher pins (22) described above are provided for carrying the winding body.
Here, the yarn loader (3) with its pegs (22) is set at a certain angle to the horizontal (e.g., an angle between 5 ° and 20 °, typically about 13.5 °) to allow the pegs ( 22) can move freely between the adjacent sleeves, in particular without touching the associated removable winding bodies or removable parts of winding bodies.
The holder (53) is provided with positioning elements, such as, for example, longitudinal grooves into which corresponding ribs of the removable winding body (106) engage so that this winding body (106) cannot rotate undesirably with respect to this holder (53). In addition, the holder (53) also comprises a first holding means (50) which is provided to cooperate with a second holding means of the winding body (106), to also hold this winding body (106) axially in place. In the embodiment of Figure 12, the holder (53) for this purpose comprises a permanent magnet (50) which acts on a magnetizable part (51) of the removable winding body (106).
Figure 13 shows the resting position (I) and the winding position (II) of the winding body (106).
In the rest position (I), the winding body (106) is blocked in an end piece (113) fixedly connected to a yarn supply tube (2). No new yarn can be supplied in this position (I).
The push pins (22) of the yarn loader (3) are now provided to move the winding body (106) from this rest position (I) to the winding position (II). This winding position (II) is only a few centimeters away from the rest position (I), along the longitudinal direction of the yarn supply tube (3), between 1 to 4 centimeters, preferably 2 or 3 cm.
Figure 14 shows the winding body in the rest position (I) in connection with an end piece of a yarn supply tube, without the yarn supply present. The winding body (106) and the end piece (113) are positioned in the rest position (I) relative to each other by means of connecting means (55), (56) which change the mutual position of the winding body (106) and the end piece (113).
On the one hand, the winding body (106) comprises a T-shaped protrusion (55) at two diametrically opposite locations. On the other hand, the end piece (113) also comprises, at two diametrically opposite locations, a respective set of two opposite fingers (56a), (56b) between which an intermediate space extending along the axis of the yarn supply tube (2) is provided. The flanks facing each other of these opposing fingers (56a), (56b) have a toothing. The position of the fingers and the spacing between the fingers of each set are such that the winding body (106) with each of its said T-shaped protrusions (55) in a respective gap between a set of fingers (56a), (56b) of the end piece (113) can be brought. The T-shaped protrusions (55) are thereby held in a position between two successive teeth so that the winding body (106) is blocked in that resting position (I). Because the fingers and / or the T-shaped protrusions (55) are elastically deformable, the position of the winding body (106) relative to the end piece (113) can be changed, the winding body (106) along the axis of the storage housing ( 2) is movable. Due to this elastic deformability, the desired holding force of this connection is also realized, and the winding body can be released from the end piece.
In Figure 14, the winding body (106) is provided with T-shaped protrusions (55), while the end piece (113) is provided with recesses. This might just as well be the other way around. An embodiment in which the winding body (106) and the end piece (113) each comprise a combination of two or more types of connecting means (55), (56) is also possible.
Fig. 14 also shows the two cooperating parts (117a), (117b) of the positioning element. After the filling operation, the end portion (16) of the yarn supply will be located between these two parts (117a), (117b) of the positioning element.
Figure 15 shows how the removable winding body (106) is placed in its winding position (II) on the winding unit (31). The part (117b) of the positioning element (117) connected to the removable winding body (106) is located behind the winding location in this condition, which is determined by the steeply rising sloping edges (118) of the supporting part of the winding unit . These ascending flanks can optionally also be (partially) provided on the removable winding body (106) itself. In any case, projecting parts are also provided on the winding body (106) which ensure that, upon removal of the winding body from the winding unit (31), the yarn supplied is removed along with the winding body (106). The projecting parts are also in the winding position (II) of the winding body (106) behind the winding location. This can also be seen on figure 16, where it is shown where the yarn is supplied.
Figure 17 also shows the corresponding end piece (113) in its position relative to winding unit (31) and the winding body (106) when the latter is in its winding position (II).
The method for replenishing the yarn supply in a yarn supply space in the embodiment associated with Figure 12 and following can be described as follows: 1) The platform on which the yarn loader (3) stands is moved to a next position to complete the filling cycle of the according to the control program start selected yarn supply tube (2); 2) The suction unit (43) moves on a straight guide to the positioning element (117a, 117b) of the selected yarn supply tube (2) and sucks at its suction opening (45) the end portion (16) of the yarn supply (14) contained therein and pulls the yarn in a direction opposite to the direction indicated by the arrow D in Figure 9; 3) The front gripper (39) takes the yarn end part (16) between the positioning element (117a, 117b) and the suction opening (45) of the suction unit (43), and moves it, for example by means of a rotating movement, by means of a pneumatic or electric motor so that a yarn length originating from the previously present yarn supply (14) is pulled out of the yarn supply tube (2) and placed in the connection unit (38). The end part of the yarn coming from the external yarn stock is meanwhile still ready in the connection unit (38), since it is positioned here at a previous yarn supply cycle (see below); 4) The pistons of the connecting unit (38) are applied, after which the clamping element of the cutting and clamping unit (44) and the clamping element of the front gripper (39) are opened; As a result, the yarn parts to be connected come to lie tightly in the connecting unit (38).
5) In the connection unit (38) the two yarns are connected, while the waste from this connection operation is sucked away by the waste remover (41), which consists, for example, of two suction lines which, after tying a node, suck in the yarn parts cut from this node and removing to the collection point (42); 6) The blow-back unit (35) is actuated and it sucks in the wire so that it becomes taut. (The yarn windings present in the yarn supply tube (2) are hereby not sucked out of the storage space because the yarn is still sufficiently clamped in the positioning element (117).
7) A test may be carried out here to test the connection. The resources required for this are not specified.
8) The yarn loader is moved to the front portion of the take-up unit that serves as support for the take-up body (106) aligned with the selected yarn supply tube (2); 9) The connection unit (38) is in the meantime prepared for a next connection operation; 10) The rotor (11) rotates the feed eye (11a) until the feed eye (11a) is at the top; 11) The winding unit (31) is brought with its holder (53) into the opening of the winding body (106) and thus into the end piece (113) of the yarn supply tube (2) to a position where the winding body (present in the end piece) 106) has not yet been fully positioned in its winding position.
12) The pusher pins (22) are moved axially in the direction of the yarn supply tube (3), then radially to the central axis of the take-up unit in openings of the take-up body (106), then axially away from the supply housing (3), after which they be moved radially back out. As a result, the winding body (106) is removed from its associated end piece (113) and brought to the correct place for winding up. A magnet (50) is provided on the winding unit (31) (at the height of the end-point of the central axis) which cooperates with a magnetically influenceable part (51) on the winding body (106). The magnet (50), for example a permanent magnet, secures the position of the winding body (106) on the winding unit (31).
13) The blow-back unit (35) is deactivated.
14) The anticipated amount of windings is now wound onto the winding body (106) by rotating the feed-through eye (11a) according to the winding rotation line. This winding takes place outside the storage space (2). The yarn windings are moved on the winding body (106) to the portion that is in the yarn supply tube (2); after all, during the build-up of the yarn supply, the pushing elements (12) always push the last laid parts of the yarn winding forward so that they come to rest against the previous windings and so that the wound up stock is pushed forward in the direction of the free end (7) of the yarn stock. winding body (106). The magnet (50) that holds the take-up body (106) in position relative to the take-up unit (31) provides sufficient force to hold the take-up body (106) while pushing the yarn windings. During the winding, the yarn is supplied from the external yarn supply via a supply tensioner (34) which supplies the correct tension for laying the windings; this supply tensioner (34) can optionally be controlled in function of the properties of the yarn to be supplied (100). Thereafter, the yarn fed passes through the winding unit (31), first running along the central axis of rotation of the feed eye (11a) and then deflecting in a slanted channel and running to the feed eye (11a). The transit eye (11a) finally comes to a halt at the top position.
15) After laying the desired amount of yarn, one of the pusher pins (22), (for example, the right one) of the pusher mechanism (21) is radially displaced in the direction of the central axis of the take-up body (106), with the aid of a pneumatic piston or via a linear motor. This pin (22) goes beyond the diameter at which the yarn is wound.
16) The feed-through feed eye (11a) now performs a number of slow rotations (for example, a pair) in a direction of rotation that is opposite to the winding-up direction.
The yarn is then first bent over the inserted pin (22). The stock thus built up serves to have a quantity of yarn available for a subsequent connection operation. The feed eye comes to a stop at a position laterally from and just next to the positioning element (117a), (117b). The last part of the yarn supply is now ready to be clamped, when replacing the winding body (106), between a part (117b) of the winding body (106) and a part (117a) of the end piece (113) (this clamping over a certain length, allows to determine the direction of the end portion (16) of the yarn supply in the yarn supply tube (2).
17) Now the remaining push pins (22) are also moved radially inwards.
Steps 15 to 17 may optionally be replaced by other methods to realize a desired yarn reserve for joining; for this purpose the pins can be moved in other sequences, combined with corresponding changes in the direction of rotation of the take-up unit. This can even lead to a different direction for normal take-up direction.
18) The pusher pins (22) then move axially along the longitudinal direction of the take-up body (106) towards the free end (7) and push the take-up body (106) with the windings present on it into the end piece (113) of the yarn supply tube (2).
19) The feed eye (11a) is now rotated in the direction of rotation that is opposite to the winding turn up to just the upper position of the feed eye (11a). As a result, the end portion (16) of the yarn supply is better directed into the positioning element (117).
20) The pusher pins (22) are moved back to their original position, first being moved back in radial direction away from the axis of the take-up body and then backwards in the axial direction, against the yarn feeding direction.
21) The winding unit (31) and the fixedly connected components now move away again from the yarn supply tube (2), while the yarn remains in the positioning element (117). The feed-through eye (11a) now rotates further with rotation direction opposite to the winding rotation direction so that the yarn comes to lie just above the connection unit (38) accessible from above.
22) The yarn loader (3) then moves upwards, so that the yarn ends up in the cutting and clamping unit (44). The rear yarn gripper (40) grabs with its clamping element the yarn that extends between the yarn supply tube (2) and the lead-through eye (11a) and prepares the yarn in the connection unit (38).
23) Thereafter, the yarn is cut and the portion connected to the external yarn supply is clamped in the clamping element of the cutting and clamping unit (44).

权利要求:
Claims (33)
[1]
A yarn storage device for a yarn processing machine comprising at least two yarn supply spaces (2) for storing a yarn supply, at least one yarn loader (3) provided to be moved to a selected yarn supply space (2), around one end of a yarn supply space in said yarn supply space (2) connect yarn present (14) to an end of an external yarn stock, and to add a certain amount of yarn in that yarn stock space (2), characterized in that each yarn loader (3) is provided to add it firstly wind up yarn (100) on a winding body (6) and then remove it from the winding body (6) in the wound state and add it to the yarn supply space (2).
[2]
Yarn storage device according to claim 1, characterized in that a respective winding body (106) is associated with each yarn supply space (2) and that the yarn loader (3) is provided for winding yarn on the winding body (106) of the selected yarn supply space (106) 2), and to remove at least a portion of the yarn wound on this winding body (106) from this winding body (106) in the wound state so that it is added to the yarn supply.
[3]
Yarn storage device according to claim 2 or 3, characterized in that the yarn loader (3) comprises a holder (53) for holding a removable winding body (106) in a winding position (II).
[4]
Yarn storage device according to claim 2 or 3, characterized in that the winding body (106) comprises a winding jacket around an inner space, and an open side along which the holder (53) can be brought into this inner space around the winding body (106) in the winding position (II).
[5]
Yarn storage device according to one of claims 2 to 4, characterized in that the yarn loader comprises a carrier device (22) which is provided for carrying the winding body (106) of a selected yarn supply space from a rest position (I) in the yarn supply space (2) to a take-up position (II), and to return the take-up body (106), after adding yarn to the yarn supply space (2), to said rest position (I).
[6]
Yarn storage device according to one of claims 2 to 5, characterized in that in each yarn supply space (2), the winding body (106) is connected to a fixed part (113) of the yarn supply space (2) such that the winding body (106) is axially is slidable between a rest position (I) in which the winding body (6) is mainly located in the yarn supply space (2), in the passage (2a) along which the yarn is added, and a winding position axially offset with respect to the rest position (I) (II) wherein a larger portion of the winding body (106) is outside the yarn supply space, so that yarn can be wound.
[7]
Yarn storage device according to one of the preceding claims, characterized in that the yarn loader (3) is provided for winding a quantity of yarn on the winding body (106), while the winding body (106) is located with the free end (7) in the yarn supply space (2) and that, as new yarn windings are added to the winding body (106), the yarn wrappings already present on the winding body are moved towards the free end (7) and there removed from the winding body (106) and attached to the winding body (106). yarn stock in the yarn stock space (2) can be added.
[8]
Yarn storage device according to one of claims 2 to 7, characterized in that each yarn supply space (2) comprises a positioning means (117a), (117b) for positioning an end part (16) of the yarn present in the storage space (2) that each winding body (106) comprises a first part (117b) of the positioning means, the positioning means comprises a second part (117a) fixedly arranged with respect to the yarn supply space (2), and that the winding body (106) is provided to be placed in such a position relative to the yarn supply space (2) that the first (117a) and the second part (117b) of the positioning means extend adjacent to each other in a mutual position where said end part (16) of the yarn between this first (117a) and this second part (117b).
[9]
The yarn storage device according to claim 1, characterized in that the winding body (6) is a fixed part of the yarn loader.
[10]
Yarn storage device according to one of the preceding claims, characterized in that the yarn loader (3) comprises at least one push element (12) which is provided for displacing the wound yarn or a wound part thereof on the winding body (6).
[11]
Yarn storage device according to claim 10, characterized in that each pushing element (12) is provided for exerting a substantially axially directed pushing force on the yarn.
[12]
Yarn storage device according to claim 10 or 11, characterized in that each pushing element (12) is provided for moving the yarn windings wound up on the winding body (6) by pushing against the yarn of the last wound yarn winding.
[13]
Yarn storage device according to claim 12, characterized in that the yarn loader (3) comprises two or more pushing elements (12) which are provided to push against successive parts of the yarn of the last wound yarn winding at successive times.
[14]
Yarn storage device according to one of the preceding claims, characterized in that the winding body (6) defines a winding surface for the yarn and a free end (7) along which the wound yarn can be slid off the winding surface, and in that the transverse dimensions of the winding surface decrease in the direction of said end (7).
[15]
A yarn storage device according to claim 14, characterized in that the winding surface is interrupted by at least two recesses (10) extending along the axis of the winding body.
[16]
A yarn storage device according to claim 14, characterized in that the winding body (6) comprises a core (8) and at least two ribs (9) radially extending from the core (8) with intermediate recesses (10), and that the end faces of said ribs (9) form the wrapping surface for the yarn.
[17]
Yarn storage device according to one of the preceding claims, characterized in that the yarn loader (3) comprises a yarn carrier (11a) that is rotatable around the fixed winding body (6) or, if the winding body is not a fixed part of the yarn loader (3) , around the winding body (6) placed in the winding position (II) so that a yarn carried by the yarn carrier is wound on the winding body (6) by the rotational movement of the yarn carrier (11a).
[18]
Yarn storage device according to one of claims 1 and 9 to 17, characterized in that this device comprises at least one pusher device (21) which is provided for removing an amount of yarn (100) wound on the winding body (6) from the winding body (6) to push while maintaining the yarn windings.
[19]
A yarn storage device according to claim 18, characterized in that the push-off device (21) is provided with at least one push-off element (22) which is displaceable in a recess (10) of the winding body (6) extending along the axis.
[20]
Yarn storage device according to one of claims 1 and 9 to 19, characterized in that each yarn supply space (2) comprises: a passage (2a) through which the yarn is added, and a weather container (13) with at least one located in the passage or in restraining element (15) extending in the vicinity of the passage, which reduces the passage such that the yarn windings located in the yarn supply space (2) are held in the yarn supply space.
[21]
A yarn storage device according to claim 19, characterized in that each weather container (13) comprises at least one retaining element (15) which, by exerting a pushing force in the insertion direction on it, counteracts a spring force and / or a force exerted by the yarn already present. is movable, rotatable or elastically deformable so that at least a part of the winding body (6) of the yarn loader (3) can be brought into the yarn supply space (2), and that each restraining element (15) is displaced back after the disappearance of said pushing force or spring back to a position where it holds the yarn windings in the storage space (2).
[22]
Yarn storage device according to one of the preceding claims, characterized in that each yarn supply space (2) is a fixedly positioned positioning means (17); (117a), (117b) for positioning an end portion (16) of the yarn located in the storage space (2), and that the positioning means (17)); (117a), (117b) is provided such that a yarn extending between the yarn supply (14) and the yarn carrier (11) rotates the yarn carrier (11a) in conjunction with the positioning means (17); (117a), (117b) can be brought.
[23]
Yarn storage device according to claim 23, characterized in that the positioning means (17) is provided in such a way that a yarn extending between the yarn supply (14) and the yarn carrier (11a) has only a rotation direction of the yarn carrier (11a) which is opposite to the take-up axis, can be brought in cooperation with the positioning means (17).
[24]
A yarn storage device according to any one of the preceding claims, characterized in that it comprises a programmable control unit which is provided to automatically determine a sequence of yarn supply tubes (2) based on pre-entered data and / or received signals from detection means provided for this purpose yarn (100) must be added, and to automatically move and control the yarn loader (3) to perform yarn addition in accordance with this sequence.
[25]
A yarn processing machine comprising at least one yarn storage device (1) comprising at least two yarn supply tubes (2) for storing a yarn supply, and comprising at least one yarn loader (3) provided to be moved to a selected yarn supply space (2) , to connect one end (16) of a yarn supply present in said yarn supply space (2) to an end of an external yarn supply, and to add a certain amount of yarn in said yarn supply space, characterized in that each yarn storage device (1) yarn storage device according to any of claims 1 to 23.
[26]
A yarn processing machine provided with at least one yarn storage device (1), according to claim 25, characterized in that it is a weaving machine, a tufting machine, a knitting machine or a tree machine.
[27]
A method for replenishing a yarn supply for a yarn processing machine wherein at least two yarn supply tubes (2) are provided with a yarn supply, and wherein the yarn supply (14) in a selected yarn supply space (2) is supplemented by an end (16) of the yarn supply connect yarn in that yarn supply space with one end of the yarn in an external yarn supply, and then add a certain amount of yarn in that yarn supply, characterized in that the yarn to be added is wound on a winding body (6) and then wrapped in the wound state of the winding body (6) is removed and added to the yarn supply space (2)
[28]
Method for replenishing a yarn supply for a yarn processing machine according to claim 27, characterized in that a winding body (6) is associated with each yarn supply space (2), said yarn on the winding body (6) of the selected yarn supply space (2) ), and that at least a portion of the yarn wound on this winding body (2) is removed from this winding body (6) in the wound state so that it is added to the yarn stock.
[29]
Method for replenishing a yarn supply for a yarn processing machine according to claim 28, characterized in that the winding body (6) of a selected yarn supply space from a rest position (I) in the yarn supply space (2) by a carrier device (22) of the yarn loader (3) is taken to a winding position (II), and that the winding body (6), after adding yarn in the yarn supply space (2), is placed back in said resting position (I).
[30]
Method for replenishing a yarn supply for a yarn processing machine according to one of claims 27 to 29, characterized in that the yarn is wound on the winding body (6) located outside the yarn supply space (2).
[31]
Method for replenishing a yarn supply for a yarn processing machine according to one of claims 27 to 30, characterized in that the wound yarn, as further additional yarn is wound, is moved on the winding body (6).
[32]
Method for replenishing a yarn supply for a yarn processing machine according to claim 31, characterized in that the wound yarn is pushed away from the winding body (6) as a result of its displacement and is added to the yarn supply space (2) thereby adding the pushes yarn stock (14) present in the yarn supply space (2).
[33]
A method for replenishing a yarn supply for a yarn processing machine according to claim 31 or 32, characterized in that a quantity of yarn is wound on the winding body (6) while the winding body (6) moves with the free end (7) in the yarn supply space (2) and that as new yarn windings are added to the winding body (6), the yarn windings already present on the winding body are moved towards the free end (7) and are removed from the winding body (6) there and the yarn stock in the yarn stock space (2) is added.

类似技术:

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公开号 | 公开日 | 专利标题

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BE1019592A3|2012-08-07|YARN STORAGE DEVICE FOR A TEXTILE MACHINE.

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CN101780902B|2012-12-05|Yarn winding apparatus and method, take-up winding apparatus and method, and taper end package

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GB1583229A|1981-01-21|Inserting threads into a winding machine

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EP0421943B1|1994-04-13|Automatic warp threading method and device for carrying out the method

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CA1267875A|1990-04-17|Process and device for simultaneously launching a plurality of textileyarns from a continuous delivery

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US7325283B2|2008-02-05|Method and device for thread distribution in a warping frame

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US2794532A|1957-06-04|Transfer mechanism operable between successive bobbin conveyors

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CZ20023616A3|2003-04-16|Carpet weaving

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US3377677A|1968-04-16|Device for increasing the speed of coil replacement in a creel assembly

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US9487887B1|2016-11-08|Systems and methods for manufacturing textiles

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CS249508B2|1987-03-12|Weft magazine for weaving machines

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CN106103321A|2016-11-09|For storing the device of long wire spool

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JP5255572B2|2013-08-07|Device and partial warping method for positioning a yarn within the width of a warp band

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RU2629970C2|2017-09-05|Modular unit for bobbin holder

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BE1027254B1|2020-12-07|Method for replenishing yarn supplies in a yarn supply device of a textile machine and a yarn supply device provided for this purpose

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CN102851819B|2014-12-24|Sample warper

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US3327736A|1967-06-27|Winding machine

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SU734318A1|1980-05-15|Apparatus for charging with thread the weft inserters of wave-type shedding looms

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BE1014792A6|2004-04-06|Weaving loom, has shed forming parts and stops arranged in non axial direction rows on rotor

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NL1035342C2|2009-10-27|Creel system for delivering thread or yarn to processing device i.e. tufting machine, has support element provided with holder for holding stock wire, and transport system for feeding yarn from holder to tufting machine

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US395178A|1888-12-25|Gustave scelles

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CS8902749A2|1991-08-13|Device for yarn stock placing

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CN113382649A|2021-09-10|Hair planting device

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EP0459553A1|1991-12-04|Process and device for the provision of bobbins to looms in a weaving mill

同族专利:

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公开号 | 公开日

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DK2721204T3|2017-05-01|

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EP2721204B1|2017-03-22|

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US9511974B2|2016-12-06|

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PL2721204T3|2017-09-29|

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WO2012176041A2|2012-12-27|

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WO2012176041A3|2014-03-27|

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EP2721204A2|2014-04-23|

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US20140131499A1|2014-05-15|

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BE1019590A3|2012-08-07|

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CN103987884A|2014-08-13|

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CN103987884B|2017-06-20|

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法律状态:

优先权:

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申请号 | 申请日 | 专利标题

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BE2011/0377A|BE1019590A3|2011-06-20|2011-06-20|YARN STORAGE DEVICE FOR A TEXTILE MACHINE.|

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BE201100377|2011-06-20|PL12743768T| PL2721204T3|2011-06-20|2012-06-20|Yarn storage device for a textile machine|

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CN201280029212.1A| CN103987884B|2011-06-20|2012-06-20|For the yarn storage equipment of weaving loom|

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PCT/IB2012/001216| WO2012176041A2|2011-06-20|2012-06-20|Yarn storage device for a textile machine|

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DK12743768.9T| DK2721204T3|2011-06-20|2012-06-20|YARN STORAGE DEVICE FOR A TEXTILE MACHINE|

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EP12743768.9A| EP2721204B1|2011-06-20|2012-06-20|Yarn storage device for a textile machine|

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US14/127,160| US9511974B2|2011-06-20|2012-06-20|Yarn storage device for a textile machine|