• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Device for the automatic rewelling of fabric webs (1) on a large embroidery machine with a side tensioning device (10) for tensioning the embroidery base with lateral side tensioning strips, which tension the fabric web (1) transversely to the first tensioning direction of the fabric corrugations winding up the fabric, with engagement elements on the side tensioning strips are arranged for attack on the fabric web (1), which remain in tensioning engagement with the edges of the fabric web (1) running between the fabric waves, at least during the post-corrugation, the side tensioning strips of the side tensioning device (10) consisting of at least one parallel to the side edge of the fabric web aligned holding means (22), on which a number of rotatably mounted needle wheels (23) arranged at a mutual distance along the first tensioning direction are attached, and that needles of the needle wheels (23) at an oblique angle to the second tensioning direction transverse to the first tensioning direction in the fabric ahn (1) intervene to tension the same along the second tensioning direction.
    公开号:CH716653A2
    申请号:CH01212/20
    申请日:2020-09-23
    公开日:2021-03-31
    发明作者:Wiegand Boris；Rothenbühler Peter
    申请人:Saurer Ag；
    IPC主号:
    专利说明:

    description
    The invention relates to a device for the automatic rewelling of webs of material on a large embroidery machine according to the preamble of claim 1.
    A post-wave according to the prior art takes place when the excess fabric or several sewn together webs of fabric are wound on a lower fabric shaft. On an upper fabric wave there is only the initial wave cloth, which initially holds the fabric. The whole area is then embroidered and as soon as this area is embroidered, the fabric must be brought onto the upper fabric shaft. For this purpose, both fabric shafts are driven to rotate simultaneously and synchronously and wind the fabric onto the upper fabric shaft. At the same time, the embroidery gate moves downwards synchronously with this winding movement, in such a way that the embroidery needles stop facing the fabric. This means that the gate is in the lower position and part of the fabric moves from the bottom to the top. This process is called post-wave.
    It is known to spread the stretched fabric web in the embroidery gate of the large embroidery machine laterally in that a manual tension is applied to each side of the fabric web side tensioning devices.
    So that the embroidery base is evenly covered over its entire width, it is laterally stretched horizontally with a side tensioning bar transversely to the tensioning direction of the fabric waves and finally tightened in the vertical direction by the fabric waves.
    It is therefore an embroidery machine in which the fabric is pushed forward from time to time, so rewrapped and stretched taut, in order to feed new pieces of tissue to the embroidery process. With the known side tensioning rods, it should be made possible to ensure that the fabric spreads smoothly on the embroidery frame during post-corrugation and tensioning of the fabric.
    Such a post-wave occurs not only when connecting a first web of fabric to a second one, but also during the embroidery process, especially for fabrics that are particularly prone to warpage. According to the prior art, this is done by manually engaged side tensioning devices, each side tensioning device consisting in a known manner of a side bar with a number of rows of needles arranged there and each side bar manually engaging the side edges of the fabric web when the embroidery machine is at a standstill must be brought in order to then achieve a lateral tension of the fabric web via an assigned tensioning device. The needle-reinforced side bars are then disengaged again and the length of fabric can be embroidered again.
    However, such a manual post-wave is very complex and can only be carried out by experienced specialists, because the lateral tensioning of the web of material must take place evenly on the rows of needles of the side bar. If the fabric is stretched at an angle or inadequately, the side tension of the fabric will deteriorate, which will lead to a deterioration in the embroidery image.
    [0008] There has therefore been a need for a long time to automate the post-waving of material webs.
    In the case of automated post-corrugation, the side edges of the fabric web remain constantly in engagement with the side tensioning strips while the embroidery base is being embroidered and during post-corrugation.
    In DE 2856871 A1 (Gröbli) and DE 329 397 A, continuous retensioning is provided in that a needle chain with needles arranged thereon is continuously brought into engagement with the lateral edge of the web of material. The disadvantage is that the lateral tension on the length of material is lost if the material is waved while the length of material is moving through the side tensioning strips. A loss of tension occurs primarily in the space between the lower fabric shaft and the first point of engagement of the first needle of the needle chain on the fabric. It is therefore a question of untensioned side edges of the fabric in the lower area in front of the lower fabric shaft, which leads to an undesirable distortion of the fabric in this area.
    This disadvantage also adheres to DE 28 56871 A1. This document shows an endless belt as a side tensioning device, which carries pins which are arranged at a distance from one another in the longitudinal direction and which engage the fabric web along a selvedge. The pins are pressed one after the other into the selvedge by means of a suitable device. There is also a release and holding device (hanging device) provided, which releases the selvedge from the pins. In order to keep the fabric webs under a predetermined transverse tension, a band is provided which extends parallel to the longitudinal direction of the fabric webs and with the spaced apart arranged pins to capture the opposite selvedge of the fabric is provided. The band is supported by a plurality of spaced-apart leaf springs, which in turn are mounted on brackets that are pivotably mounted around a rod or shaft between a rest position and a work site engaging the fabric web.
    The disadvantage of this arrangement, however, is that the flexible band of the side bar chain is rotated during re-tensioning and the tension is lost as a result, so that whenever new material is added, the needles of the side bar chain go inward and therefore only a short span length is available . Therefore, there is the disadvantage that the known side bar chain, which is armed with a needle, does not allow reliable vertical corrugation of material webs.
    A similar prior art can be found in DE 17 98 44 C, in which a fixed side clamping device is described, as it was also recognized as prior art in Figure 1 of the present invention. The disadvantage of such fixed devices is the need for manual operation, as mentioned in the introduction to the description, and a further disadvantage is that such manual retensioning can only be carried out by trained specialists.
    In EP 0919657 B1 it is assumed that when the embroidery base is curled onto the fabric waves, it is detached from the side tensioning strips.
    The side tensioner has a plurality of segments, each segment being attached to a link of a chain. The chain forms a closed loop and is guided around a pulley at the top and bottom. In the area in which the chain is guided in the straight guide rail, the segments are lined up and form the side tensioning bar with thorns or other fastening means that can be suspended in the embroidery base. So that the segments can be detached when the pulley revolves without tearing the embroidery base, they must be detached from it. For this purpose, release devices are arranged at the top and bottom of the side tensioning device. Due to the fact that when the embroidery base is corrugated onto the fabric waves, it is detached from the side tensioning strips, there is a risk of the embroidery base becoming warped because a uniform tensioning force can no longer be applied to the embroidery base.
    DE 79 320 A shows an actively driven side bar chain which is driven by the fabric shaft via a pinion drive. When the fabric continues, tension is lost because the fabric cannot be reliably grasped in the needle device of the side bar chain. As a result, such a device is unreliable.
    The invention is therefore based on the object of developing a device for the automatic rewelling of fabric webs on a large embroidery machine so that a reliable needle engagement of a side tensioning device is guaranteed even with sensitive fabric webs with a tendency to warp.
    To solve the problem, the invention is characterized by the technical teaching of claim 1.
    The advantage of the invention is that in the side tensioning device according to the invention with spiked wheels (which are also referred to below as needle wheels), the webs of material do not have to be released from the side tensioning device during post-corrugation. Therefore, the lateral fabric tension is maintained during the entire post-corrugation process because the pin wheels remain in engagement with the side edges of the fabric web during post-corrugation and the tension on the fabric web is maintained due to the inclined engagement of the needles of the needle wheels, for example due to their inclination.
    The reason for the oblique engagement of the needles, in particular the inclined position of the needle wheels, is that the fabric initially loses tension during the waving when passing from one needle wheel to the next needle wheel. Due to the fact that the needles engage at an angle, the overall side tension on the fabric web is maintained, so that the loss of the side tension on one needle wheel is compensated for by the subsequent needle wheel.
    The degree of post-tensioning or the degree of side tension on the fabric webs can be influenced in that the needle wheels are preferably designed to be pivotable and lockable on their holders. The pivotability and / or the lockability can be done manually or automatically, the latter further preferably by means of an actuator, the actuator being designed to pivot and / or lock at least one needle wheel, particularly preferably a defined group of needle wheels.
    The preferred inclination of the needle wheels is therefore set as required depending on the properties of the material web, and this inclination is maintained during the entire post-corrugation process.
    According to a further preferred feature of the invention it is provided that a total of several needle wheels in an inclined position (as seen in the width of the fabric web) one behind the other are in engagement with the fabric, so that it is always ensured that at least one needle wheel row in engagement with the panel comes.
    Thus, a particularly reliable arrangement is created, because once the fabric web, z. B. comes out of engagement with the inner row of needle wheels, the fabric is already in engagement with the middle row of needle wheels and then finally the fabric with the outer row of needle wheels, so that it is always ensured that the rows of needles with the needle wheels arranged there are not disengaged the fabric web during the automatic post-waving process.
    In principle, it is sufficient to provide only one tensioning row with needle wheels arranged along a first tensioning direction caused by the fabric waves.
    In another embodiment, however, it is preferred if at least two rows of needles with associated needle wheels, which are arranged one behind the other, are used along a second tensioning direction running transversely to the first tensioning direction. It is particularly preferred, however, if a total of three such rows of needles are provided with three needle wheels lying one behind the other.
    Instead of three such rows of needles with needle wheels, fewer or more rows can of course be used, for. B. also four or five rows of needles with associated needle wheels.
    The aim of the new development is to avoid the interruption in the post-wave process and not to interrupt the work flow of the machine.
    For this purpose, the side tensioning device according to the invention with spiked wheels was developed so that the side tensioning rods do not have to be released from the web of material during "post-wave" with their needle wheels; the lateral tension of the web of material is retained in full during the post-waving process, and a Distortion due to insufficient engagement of side tensioning rods, as described in the prior art, is excluded in the invention.
    The subject matter of the present invention results not only from the subject matter of the individual claims, but also from the combination of the individual claims with one another.
    All information and features disclosed in the documents, including the abstract, in particular the spatial configuration shown in the drawings, could be claimed as essential to the invention, provided that they are new, individually or in combination, compared to the prior art. The use of the terms “essential” or “according to the invention” or “essential to the invention” is subjective and does not imply that the features named in this way must necessarily be part of one or more patent claims.
    In the following, the invention is explained in more detail with reference to drawings showing only one embodiment. Further features and advantages of the invention that are essential to the invention emerge from the drawings and their description.
    It show:
    Figure 1: a manually operable side tensioning device for the fabric webs on a large embroidery machine according to the state of the art
    Figure 2: the automatic side tensioning device according to the invention in a perspective view
    FIG. 3: an enlarged section through the side tensioning device according to the invention
    FIG. 3a: a schematic representation of the oblique engagement of a needle wheel in the web of material
    FIG. 3b: a schematic representation of the inclination of a needle wheel in relation to the fabric web in a view from the direction of the fabric web surface
    Figure 4: the perspective view of the side tensioning device according to the invention in closed engagement with the fabric web
    FIG. 5: the same representation as FIG. 4 with the side tensioning device lifted from the fabric web
    FIG. 6: an embodiment modified compared to FIGS. 1 to 5 with a side tensioning device consisting of a circumferential side bar chain
    FIG. 7: the same representation as FIG. 6 with the representation of the lower end of the side bar chain
    Figure 1 shows a side tensioning device 10 according to the prior art, which is arranged on an embroidery gate 9, the embroidery gate 9 only the upper fabric shaft 3 with its right bearing 13 and the lower fabric shaft 4, which is via a gear 12 is driven in rotation by a drive motor 11, are shown.
    The fabric web 1 is guided over the two fabric shafts 3, 4 and stretched.
    When post-wave according to the prior art, the fabric web 1 is guided upwards in the direction of arrow 20, before the fabric tension is released by corresponding counter-rotating drive of the two fabric shafts 3, 4 and it is assumed that the side bar 5 with its arranged thereon Rows of needles 6, 7 are initially out of engagement with the fabric web 1.
    For post-waving, the fabric web is therefore shifted upward in the direction of arrow 20, and the side rod 5 is shifted to the right with an associated release and holding device 15 in the direction of arrow 17, the clamping device 18 being released. The side bar is brought into engagement or disengagement from the fabric web with its needles.
    Here, the holding rod 16 functions as a guide for the entire side tensioning device 10.
    The lateral fabric edge 2 must now be brought into engagement with the rows of needles 6, 7 of the side rod 5 and the individual needles 8 arranged there via manual intervention.
    The hanging of the fabric web 1 on the side fabric edge 2 is now carried out by a manual attack on the side fabric edge 2, which is now hung piece by piece on the needles 8 of the rows of needles 6, 7 under a bias in the direction of arrow 21.
    A great deal of experience is required for this manual intervention, because the operator must avoid creasing in the fabric web 1 during the waving in the direction of arrow 21.
    During this manual afterwell action, there is also an acute risk of injury to the user's hands on the rows of needles 6, 7.
    It is also mentioned that the releasing and holding device 15 is part of a hollow tube 19 which is connected to the embroidery gate 9, which is not shown in detail.
    This is where the invention comes into play, which provides an automatic, vertical in this embodiment, after-curling of a web of material 1 in that the side tensioning device 10 according to the invention now consists of a number of needle wheels 23 on the side bar side, which are preferably spaced apart one behind the other - preferably clamping rows 58a, 58b, 58c arranged parallel and vertically to one another, each clamping row 58a, 58c, 58c consisting of a plurality of needle wheels 23a, 23b, 23c arranged one behind the other in the vertical direction, which are jointly attached to a vertical holding plate 22 designed as a holding means of the embroidery frame are attached.
    Accordingly, the side tensioning strips of the side tensioning device known from the prior art consist of at least one retaining plate designed as a retaining means and equipped with rotatably mounted needle wheels. The circumference of the needle wheels occupied with needles preferably engages at an inclined angle to the tensioning direction in the web to be tensioned (Fig. 3a) and remains in lateral tensioning engagement with the fabric web during the embroidery process and during automatic post-waving.
    In a preferred embodiment, it is provided that the axis of rotation 48 of the needle wheels 23a, 23b, 23c is directed obliquely to the plane of the fabric web 1, which will be explained later with reference to Figure 3a. This leads to the mentioned, optimal lateral pretensioning of the fabric web.
    For Figure 2, the same reference numerals apply as in a side clamping device 10 according to the prior art.
    Here, too, the invention provides that the releasing and holding device 15 is arranged on a holding rod 16 and the entire releasing and holding device 15 is fastened to a hollow tube 19 of the stick gate 9.
    In contrast to the prior art, however, FIG. 2 shows that the releasing and holding device 15 has a counter holder 25 which can be moved away from and in the direction of a swiveling movement. This action is only required when when the fabric is hung in the side tensioning device at the beginning of the embroidery of the embroidery base and at the end of the embroidery process when the fabric is removed from the embroidery gate.
    According to FIG. 3, the counter-holder 25 preferably consists of two parallel rails 26, 27. The rails 26, 27 each have a rail end held in a spring-elastic manner in the direction of the needle wheels 23, via which the respective rail 26, 27 is in contact with the upper 3 or lower fabric shaft 4 without the risk of damaging the fabric shaft 3, 4. As a result, in the event of a contact, the corresponding rail end is able to easily give way in a direction directed against the resilient preload.
    The rails 26, 27 each form a hollow profile 43, so that a total of three spaced apart hollow profiles according to Figure 3 are formed, in which the periphery of the needle-reinforced needle wheels 23 is immersed and the web 1 thus in the direction of arrow 48 in the hollow profiles pushes in.
    This results in a pretensioning of the fabric web in the direction of arrow 21 because the fabric web moves past the contact surfaces 44 and is tensioned in the process.
    The inclined position of the needle wheels 23 at an angle to the tensioning direction results in a further pre-tensioning of the fabric web, which takes place automatically during the entire post-waving process. Manual intervention is no longer required.
    The counter holder 25 of the releasing and holding device 15 consists according to Figures 2 and 3 of a counter holder housing 30 on which a clamping device 28 for applying the counter holder 25 to the web 1 in the directions of arrows 42 clockwise and counterclockwise for the Lifting of the counter holder 25 is provided.
    Thus, in order to realize the release and holding function, the two rails 26, 27 can be advanced in the directions of arrows 24 onto the web of fabric 1 or moved away from the web of fabric 1.
    For fine adjustment of the contact pressure of the anvil 25 on the fabric web, it is provided that the rails 26, 27 are mounted on a holding plate 41, which are connected to the anvil housing 30 via an adjustable threaded spindle 40.
    The adjustment of the threaded spindle 40 takes place via a tensioning wheel 38 on which a handle 39 is arranged.
    If the tensioning wheel 38 is rotated, then the threaded spindle 40 is pressed more or less in the directions of arrows 24 against the fabric web or lifted off the fabric web, so that the hollow profiles 43 of the rails 27 are lifted from the fabric web or pressed against the fabric web can.
    Overall, the counter-holder 25 can be moved away from the fabric web by the tensioning device 28 in the arrow directions 42 shown and can be advanced. As already mentioned above, this action is only necessary if the material web is applied to or removed from the embroidery base.
    For this purpose, an over-center tensioning lever 31 is provided, which attaches to the connecting profile 45 in a pivotable manner via a number of bearing shafts 34, 35, 36, 37.
    Such clamping levers 31 with clamping devices are known in quick release devices. The tensioning lever 31 can either be brought into a fixed position in the direction of arrow 32, by being pivoted in the direction of arrow 32a, or into an open position in 32b, where it pivots the counter-holder 25 from the fabric web 2 counterclockwise in the direction of arrow 42.
    The clamping device 28 in FIG. 3 has an intermediate lever 53 which is necessary to fix the clamping lever 53 in its clamping position, as can be seen from FIG.
    In a further development, an automated drive of the plurality of clamping levers 31 vertically aligned with one another at a mutual distance can also be provided. For this purpose, it is sufficient to connect all clamping levers 31 to one another by a common actuator in order to achieve a simultaneous pivoting of all clamping levers 31 into the open position and the closed clamping position with the drive of the actuator.
    In Figure 3 it is shown that the pre-tension on the fabric 1 in the direction of arrow 21 (tensioning direction) is generated in that the needle carriers 23a, b, c with their circumference at an angle 64 to a parallel, horizontal line 62 to the fabric 1 are inclined. As a result, the fabric web is pressed diagonally in the direction of arrow 49 into the hollow profile 43 of the counter-holder 25 and thereby pretensioned and, on the other hand, the inclination angle 64 generating the pretensioning generates a tensile force component in the direction of arrow 21 on the fabric web 1. The angle of inclination 64 is less than 90 degrees and is preferably in the range between 60 to 80 degrees.
    It is preferred if the needle-studded periphery of the needle wheels 23 is convex. This is shown in FIG.
    It is also mentioned that the individual needle wheels 23a, 23b, 23c, which form the aforementioned clamping rows 58a, 58b, 58c, are each arranged on a holder 46a, 46b, 46c and each holder with the aid of screws 47 to its longitudinal axis can be pivoted and fixed in the directions of arrows 52.
    This creates a certain inclination of the needle wheels at right angles to the plane of the fabric according to FIG. 3, which has the advantage that the tensioning effect can be varied over the length of the side tensioning rod.
    After each holder 46a, 46b, 46c holds a number of needle rollers according to FIG. 3 in a single horizontal plane, the holders 46a, 46b, 46c are accordingly present for each row of needles according to FIG. 2.
    In this way it is possible to individually adjust the angular position of each row of needles by adjusting the rotation of the associated holders 46a, 46b, 46c.
    Experiments have shown that the lower rows of needles with the three needle wheels preferably arranged there up to a height of one third of the length of the side tensioning device 10 should have a different inclination than the remaining upper needle wheels with their associated holders 46a, 46b, 46c.
    It is thus made clear that a further advantage of the invention is that the needle wheels, which are arranged on the same horizontal plane and which are preferably provided as a three-way arrangement in the exemplary embodiment shown, are also individually set in their inclination perpendicular to the plane of the fabric web and can determine.
    This was not possible with the prior art arrangements mentioned above, because either only all needles are aligned in a manual side tensioning device or an individual arrangement and setting of the various needles is not possible with automatic needle arrangements arranged on chains or bands was.
    FIG. 4 shows the engagement of the rails 26, 27 of the counter holder 25 on the fabric web, the fabric web itself not being shown for reasons of simplicity. In this exemplary embodiment, the tensioning lever 31 is accordingly pivoted into its tensioning position and, in this drawing, the material web 1 is now automatically corrugated in the direction of the arrow 21 without manual intervention being required.
    FIG. 5 shows the lifted position of the side tensioning device 10, with the counter holder 25 with its boom lever 33 being lifted from the fabric web in the direction of arrow 42 and thus the rails 26, 27 forming the counter bracket are no longer in engagement with the fabric web . This position is used to re-tension or tension the fabric 1 in the embroidery gate.
    FIG. 5 also shows that the individual needle wheels 23a, b, c with their roller axis lines 61 do not lie in a horizontal plane, but rather form an angle 60 to the horizontal plane. This results in an upper and lower offset 63 with respect to the roller axis line 61 through a central needle wheel 23b with respect to the upper and lower needle wheel 23a, c lying in the same roller axis line 61 and connected thereto. Furthermore, FIG. 5 shows that the needle wheels 23 a, b, c mutually overlap. The overlap area is preferably designed so that
    the outer circumference of the needle wheel fitted with needles extends to or the axis of rotation of the adjacent needle wheel. This ensures that at least one needle wheel always remains in engagement with the fabric web.
    3a shows schematically the inclined engagement of a needle wheel 23 with the needles 50 arranged there on the circumference in a fabric web 1 in the area of the tension row 58a, where it can be seen that the fabric web 1 is warped and warped by the inclined engagement in the direction of arrow 21 (tensioning direction) is tensioned. It is only shown schematically by symbolic arrows that the other needle wheels 23 on the further tensioning rows 58b and 58c also engage in the fabric web 1 lying one behind the other at a short distance behind the tensioning row 58a.
    FIG. 3b shows schematically the inclination of the needle wheels 23 in relation to the fabric web 1 in a view from the direction of the fabric web surface. The inclination is realized in addition to the above in such a way that the needle wheel 23 inclines a further defined inclination to the fabric web 1 and its waving running in the direction of arrow 20 not only to the fabric web 1, but also with it, via a rotary movement of the associated holder 46 about its axis of rotation 52 a twist angle 68 experiences slightly twisted. The angle of rotation 68 is preferably selected from a range from 1 ° to 15 °. The angle of rotation 68 is more preferably selected from a range from 6 ° to 10 °. An angular amount of 8 ° is regarded as the optimal angle of rotation 68 °. The additional twist causes a more reliable tensioning of the fabric web 1 during the post-corrugation. It is not necessary here for each needle wheel 23 to be rotated in this way or for the needle wheels 23, which are inclined in this way, to be adjusted by means of an identical angle of rotation. In a preferred manner, each needle wheel 23 can be inclined, either simply or in combination, as required, in a manner as above.
    The fact that the needle wheels 23 are inclined also makes it easier to stretch the fabric because the fabric can be stretched onto the inclined needles 50 one after the other without it being unintentionally unhooked. It is accordingly preferred here if the angle between a vertical axis through the respective needle wheel 23 and a horizontal line (first angle 51) is in the range between 5 degrees and 25 degrees.
    The needle tips are preferably parallel to one another with respect to their line of engagement in the fabric and are of the same length in terms of their length. In another embodiment, however, it can be provided that the needle that comes into engagement with the fabric first is longer than, in comparison, the needles that come into engagement behind it
    Figures 6 and 7 show a modified embodiment of the inventive idea according to Figures 2 to 5 in such a way that the side tensioning device 10 is designed as a circumferential side bar chain 24, in which preferably a number of pin cushions 57a, b on a woven, bendable , but not length flexible textile tape are attached. The textile structure is the same or similar to the textile structure of a seat belt in a motor vehicle.
    Instead of using a textile belt on which the individual pin cushions 57 are attached, other belt constructions can also be used, such as a link belt, a chain or a flexible film strip that is deflected over the two deflection shafts 55.
    In FIGS. 6 and 7, the front side of a pin cushion is denoted by 57a and the rear side by 57b.
    Each pincushion consists of a multiplicity of relatively straight needles arranged thereon, which needles can also be arranged obliquely.
    Between each pincushion 57 there is a gap which does not come into needle engagement with the web of fabric.
    This differs from the inventive idea according to FIGS. 2 to 5, because the various tension rows 58a, 58b, 58c according to FIG. 5 overlap so that at least one tension row 58a, 58b, 58c is always in engagement with the fabric web. Furthermore, an actuator-driven spreader 66 is arranged between the lower fabric shaft 4 and the lower deflecting shaft 55 of the side rod chain 54. In cooperation with the counter-guide 67, this ensures the lateral fabric tension adapted to the fabric web 1. As a result, compared to the solutions known from the prior art mentioned at the beginning, the maintenance of the lateral tension of the fabric web during its movement can be ensured by the side tensioning strips.
    Also the inclination of the clamping rows, as can be seen in Figure 5, forms an angle 60 of in the range between 30 to 60 degrees, and therefore there is a mutual overlap of the needle wheels 23, which is an advantage over the embodiment according to the figures 5 and 6 because there is a gap between the pincushion 57. Such a gap is avoided by the inclined position of the clamping rows 58a, 58b, 58c.
    With the above description of a preferred embodiment, the present invention was presented in particular on a large embroidery machine in which the post-corrugation runs vertically in a front view of the embroidery machine. It goes without saying that the present invention can also be used in large embroidery machines, such as multi-head embroidery machines or the like, in which a post-wave, that is to say a web transport, does not run vertically but horizontally. Therefore, in the context of the present invention, a large embroidery machine is to be understood as any embroidery machine in which post-corrugation or material web transport occurs in an identical or equivalent manner as described above.
    Drawing legend
    [0087]
    1 panel of fabric
    2 Fabric edge on the side
    3 wave of fabric at the top
    4 wave of fabric at the bottom
    5 side bar
    6 row of needles
    7 row of needles
    8 needle
    9 embroidery gates
    10 Side clamping device
    11 drive motor
    12 transmission
    13 bearings (for 3)
    15 Release and holding device
    16 holding rod
    17 direction of arrow
    18 clamping device
    19 hollow tube
    20 direction of arrow (post-waves)
    21 direction of arrow (tension)
    22 retaining plate (of 10)
    23 needle wheel a, b, c
    24 direction of arrow
    25 counterholders
    26 rail (of 25)
    27 rail (of 25)
    28 clamping device (for 25)
    30 counterholder housing
    31 clamping lever
    32 Arrow direction a, b
    33 Boom Lever
    34 bearing shaft
    35 bearing shaft
    36 bearing shaft
    37 bearing shaft
    38 tension wheel
    39 Handling
    40 threaded spindle
    41 retaining plate
    42 direction of arrow
    43 hollow profile (from 26 + 27)
    44 Docking area
    45 connection profile
    46 holder a, b, c
    47 screw
    48 axis of rotation (of 23)
    49 direction of arrow
    50 needle (of 23)
    51 angles (of 23)
    52 axis of rotation (of 46)
    53 intermediate levers (of 28)
    54 side rod chain
    55 deflection shaft
    56 deflectors
    57 pincushion a, b
    58 Tension row a, b, c
    59 needle
    60 angles
    权利要求:
    Claims (12)
    [1]
    1. Device for the automatic rewelling of fabric webs (1) on a large embroidery machine with a side tensioning device (10) for tensioning the embroidery base with lateral side tensioning strips, which stretch the fabric web (1) transversely to the first tensioning direction of the fabric waves winding up the fabric, with engagement elements on the side tensioning strips are arranged for attack on the fabric web (1), which remain in tensioning engagement with the edges of the fabric web (1) running between the fabric waves, at least during the post-corrugation, characterized in that the side tensioning strips of the side tensioning device (10) consist of at least one parallel to the There is a holding means (22) aligned with the side edge of the fabric web, on which a number of rotatably mounted needle wheels (23) arranged at a mutual distance along the first tensioning direction are fastened, and that needles (50) of the needle wheels (23) at an inclined angle (51 ) to the transverse to the first clamping direction second tensioning direction (21) engage in the fabric web (1) to tension the same along the second tensioning direction, (Fig. 3a).
    [2]
    2. Device according to claim 1, characterized in that the needle wheels (23) form at least one tensioning row (58a) running along the first tensioning direction with respect to the side edge of the fabric web (1) and that the length of the tensioning row (58a) corresponds to the side length of the fabric web Embroidery frame corresponds.
    [3]
    3. Apparatus according to claim 1 or 2, characterized in that the needle wheels (23a, b, c) with respect to the second tensioning direction (21) form a plurality of tensioning rows (58a, b, c) lying parallel to one another and spaced from one another, ( Fig. 3).
    [4]
    4. Device according to one of claims 1 to 3, characterized in that the angle (51) between a vertical axis (48) through the respective needle wheel (23) and a horizontal line (62) is in the range between 5 degrees and 25 degrees, (Fig. 3a).
    [5]
    5. Device according to one of claims 1 to 4, characterized in that the needle-studded periphery of the needle wheels is convex, (Fig. 3)
    [6]
    6. Device according to one of claims 1 to 5, characterized in that the individual needle wheels (23a, 23b, 23c) which form the clamping rows (58a, 58b, 58c), each on a holder (46a, 46b, 46c) the holding means (22) are arranged and each holder (46a, 46b, 46c) can be pivoted and locked about its longitudinal axis.
    [7]
    7. Device according to one of claims 1 to 6, characterized in that the needle wheels (23) of a needle wheel row overlap one another (Fig. 5).
    [8]
    8. Device according to one of claims 1 to 7, characterized in that a releasing and holding device (15) for lifting the side tensioning strips from the embroidery base for the initial unclamping and clamping of the fabric web (1) is present on the embroidery frame, which consists of a the back of the fabric web applying pivotable counterholder (25) is formed on which at least one rail (26) running along the first tensioning direction with a hollow profile (43) is arranged, which is located on the back of the fabric web (1) in opposition to at least one on the front side engaging the needle wheel (23) of the side tensioning bar.
    [9]
    9. The device according to claim 8, characterized in that the pressing force of the counter holder (25) on the web of material (1) is adjustable.
    [10]
    10. Device according to one of claims 8 or 9, characterized in that the pivoting movement of the counter-holder (25) takes place with a clamping device (28) which, with a self-locking, articulated quick-release clamping device (31, 33, 53), the counter-holder (25 ) fixed in its pressing position on the fabric web (1) and that the quick-release device can be actuated with a tensioning lever (31).
    [11]
    11. The device according to claim 10, characterized in that all clamping levers (31) of the clamping devices (28) are aligned with one another and can be operated together via an actuator.
    [12]
    12. Device according to one of claims 8 to 11, characterized in that the counter-holder (25) with its clamping device (28) is arranged in each case at the front free end of the housing-side clamping devices (18) which can be displaced and locked in the clamping direction, the clamping lever (18 ) can be operated manually.
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    同族专利:
    公开号 | 公开日
    DE102019132438A1|2021-06-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE179844C|
    DE79320C|BADISCHE ANILIN- UND SODAFABRIK, Ludwigshafen a. Rh|Process for the preparation of green-blue i mordant dyes from tetralkyldiamidobenzhydrols|
    FR329397A|1902-02-19|1903-07-30|John C Alman|Lock and loquel|
    CH79320A|1917-08-31|1918-11-01|Vogtlaendische Maschf Ag|Auxiliary device on embroidery machines for properly clamping the fabric when waving from one stationary roller to another stationary roller|
    DE1485519A1|1961-10-14|1969-06-19|Zangs Ag Maschf|Device for converting a fabric field embroidered in an embroidery frame of an embroidery machine|
    US4233916A|1978-01-10|1980-11-18|Emb-Tex Corporation|Process and apparatus for producing continuous embroidered fabrics|
    DE59709710D1|1997-10-27|2003-05-08|Franz Laesser Ag Diepoldsau|Embroidery machine creel with side tension bars|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102019132438.6A|DE102019132438A1|2019-11-29|2019-11-29|Device for the automatic waving of material webs on a large embroidery machine|
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