• 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:
    Apparatus for forming a leno weave in a weaving machine having an endless support member (6) guided along an elongate endless path by a pulley (9, 10) and a thread guide (7) for guiding a leno thread placed on the endless support member (6) is mounted, the wire guide (7) having a first segment (72) extending on an inner side of the endless support member (6) and inserting into the notch (90, 100) of the pulley (9, 10) is received. Weaving machine with such a device. Method for manufacturing such a device.
    公开号:BE1028192B1
    申请号:E20210022
    申请日:2021-03-05
    公开日:2021-12-13
    发明作者:Ignace Meyns；Patrick Debergh
    申请人:Picanol Nv；
    IPC主号:
    专利说明:

    [0001] The invention relates to an apparatus for forming a leno weave in a weaving machine, and a weaving machine comprising such an apparatus. The invention further relates to a method for manufacturing such a device.
    [0002] The term leno weave describes a weave in which leno threads, also referred to as leno binder threads or leno warp threads, are twisted around weft threads.
    [0003] US3698441 discloses an apparatus for forming a leno selvedge comprising at least two wire guides mounted on an endless support member along an elongate endless track for guiding a corresponding number of leno wires from a leno wire stock to a fixed bonding point. Summary of the Invention.
    [0004] It is the object of the invention to provide an apparatus for forming a leno bond comprising a long-life endless support element and at least one pair of wire guides fixedly mounted thereon.
    [0005] According to a first aspect of the invention there is provided a leno bond forming apparatus comprising an endless support member guided along an elongate endless track and a wire guide mounted on the endless support member, in particular a pair of wire guides distributed along the endless support member, the endless support member being supported by a pulley, the thread guide being adapted to guide a leno thread toward a fabric, the thread guide having a first segment for holding the thread guide onto the endless support member mounting, the first segment extending on an inner side of the endless support element, the pulley being provided with a notch, and wherein the endless support element and the pulley are adapted to each other so that upon circulation of the endless support element, the first segment is in a notch of the pulley is received.
    [0006] Throughout this application and the claims, the indefinite article "one" or "a" means "one or more". A reference to "a first element" does not mean that "a second element" must be present. Furthermore, the terms "first" and "second" are used only to distinguish one element from another and not to indicate an order of the elements.
    [0007] In a preferred embodiment, the wire guide is provided with a clip having a first segment extending on an inner side of the endless support element and a second segment extending on an outer side of the endless support element.
    [0008] In the context of the application, a clamp is defined as an element with two segments, between which the endless support element is inserted. The use of a clamp provides a secure attachment of the wire guides to the endless support element, as the wire guides have a large contact area with the endless support element. As a result, damage to the endless support element during mounting of the wire guide and during use can be avoided. When a clamp is used, a segment of the clamp extends along an inner side of the endless support member, which inner side contacts the pulley. According to the application, with each circulation of the endless support element, this segment is received in the notch or in one of several notches to ensure smooth guiding of the endless support element with the wire guide along the pulley.
    [0009] In one embodiment, two or more pulleys with a parallel axis of rotation are provided, in particular each pulley is provided with one or more notches.
    [0010] In one embodiment, one pair of wire guides is provided for forming a leno bond, in particular in one embodiment the wire guides are evenly distributed along the endless support member. In other embodiments, two pairs of wire guides are provided, in particular in one embodiment all wire guides are evenly distributed along the endless support element.
    [0011] In one embodiment, the endless support element which is between the two segments of the clamp forces; inserted, the segments cuit each other against internal ; restoring forces, so that the endless support element is held between the two segments of the clamp by the restoring forces. Alternatively or additionally, in one embodiment, the clip is secured to the endless support member by means of a binding wire having a base and two flexible legs or by means of a U-shaped fastening element with two legs, each leg being threaded to engage with a nut. to work together. The segments of the clamp and the endless support element are provided in one embodiment with through holes for receiving the two legs. In embodiments, the binding wire or the U-shaped fastening element is inserted from an inner side of the endless support element so that the base is arranged on the inner side of the endless support element and the legs are inserted into the through holes of the clamp and the endless support element, whereby for fixing the clamps to an outer side of the endless support element, the flexible legs are bent, in particular bent towards each other and towards the endless support element, or the legs are screw-threaded by means of nuts. The base of the binding wire or the fastening element protrudes from the inner side of the endless support element, in particular a height and a width of the protruding segment of the clip together with the base are less than a depth and a width of the notch or the notches of the pulley.
    [0012] In one embodiment, the pulley is provided with only one notch, the first segment of the wire guide or, in case two or more wire guides are provided, the first segment of each wire guide is received in said notch upon circulation of the endless support element. In others ; embodiments, the pulley is provided with more than one notch. In one embodiment, the first segment of the wire guide or, in case two or more wire guides are provided, the first segment of each wire guide is received in a corresponding notch of the plurality of notches upon circulation of the endless support element.
    [0013] [0013] In one embodiment, the pulley is provided with a pulley sheave, the pulley sheave having an opening adapted to receive the wire guide, in particular to receive one or both wire guides of the pair of wire guides, upon circulation of the wire guide. endless support member, wherein the opening in the circumferential direction of the pulley is aligned with the notch. In case the pulley has more than one notch, the opening is aligned with the notch that receives the first segment of the wire guide. In other words, the opening is aligned with one notch of several notches. In embodiments, the number of openings is minimized to avoid weakening and irregular outer contour of the pulley sheave. In embodiments, two or more wire guides are provided. In case the first segments of all wire guides are received in a common notch, the pulley sheave can be provided with only one opening, which is aligned in the circumferential direction of the pulley with said notch. In case the first segments of different wire guides are received in different notches, the pulley sheave is provided with a corresponding number of openings, each opening being aligned in the circumferential direction of the pulley with one of said notches. In one embodiment, two pulley sheaves are provided at both ends of the pulley, each pulley sheave is provided with an opening. In other embodiments, only one pulley sheave is; provided. In case several pulleys are provided, in one embodiment all pulleys are provided with pulley sheaves. In other embodiments, only one pulley, in particular a drive pulley, is provided with a pulley sheave.
    [0014] In one embodiment, the endless support element is a toothed belt with a series of evenly spaced teeth, in which series of teeth one tooth is missing, the thread guide being mounted on the toothed belt at the position of the missing tooth. In one embodiment, two teeth are missing from the array of teeth, with two wire guides mounted on the toothed belt at the positions of the two missing teeth. The toothed belt is manufactured in an embodiment with missing teeth. In other embodiments, teeth are removed from the toothed belt and the wire guides are mounted, in particular clamped, on the toothed belt to replace the removed teeth. Toothed belts do not slip when properly tensioned. This ensures reliable synchronization of the movement of the thread guides with a main drive of the weaving machine.
    [0015] In one embodiment, the teeth are rounded and in particular have a semi-circular shape. The rounded, in particular semi-circular shape ensures that the teeth interlock and interlock smoothly with the pulley, thus permitting a high speed of movement of the toothed belt. The teeth may also have a different rounded or curved shape.
    [0016] The pulley in one embodiment is provided with a plurality of evenly spaced notches, the number of teeth including the missing tooth of the toothed belt being an integer multiple of the number of notches of the drive pulley, in the ; particularly an odd integer multiple of the number of notches. In case the number of teeth is an integer multiple of the number of notches, with each circulation of the toothed belt, each thread guide is received in a corresponding notch. In case the number of teeth including the missing tooth is an even integer multiple of the number of notches of the pulley, all wire guides of a pair of evenly spaced wire guides are received in the same notch. In case the number of teeth including the missing tooth is an odd integer multiple of the number of notches of the pulley, for example where the odd integer multiple is equal to three, the wire guides of a pair of evenly spaced wire guides in the two notches are received displaced by 180° . In one embodiment, all notches have an identical configuration. In other embodiments, the pulleys are each provided with a first notch adapted to receive the first segment of the wire guide or the teeth of the toothed belt, and a plurality of second notches, the second notches being adapted only to receive the teeth of the toothed belt, wherein the number of teeth including the missing tooth is an integer multiple of the aggregate of the first notches and the second notches.
    [0017] The wire guide includes a wire eye to which, in use, a leno wire is threaded for guiding the leno wire coming from a wire supply toward a fabric, particularly toward an abutment line of the fabric and/or an edge of the fabric. fabric, for example an edge on one side of the fabric. In embodiments, the wire guide is provided with a wire eye with a wear-resistant surface. In one embodiment, the wire eye is made of a wear-resistant material and/or is provided with a wear-resistant coating in the area of the wire eye. In another embodiment, a hollow insert made of a wear-resistant ceramic material is mounted on the wire guide and serves as the wire eye. In one embodiment, a wire guide made of ceramic material, also called ceramic wire guide, has a shape as shown in JPHO6-184871, the contents of which are hereby incorporated by reference. Such wire guide allows simple wiring.
    [0019] In one embodiment, at least one wire detector is provided for detecting the absence and/or presence of a wire to be passed through the wire guides. The at least one wire detector is in one embodiment a non-contact wire detector, in particular an optical detector, using a transmitter that sends a signal and a receiver that receives the signal, the presence of a leno wire causing an interruption of the signal. Alternatively or additionally, a wire detector containing a piezoelectric element is provided. In one embodiment, the piezoelectric element is mounted on a distal end of an axis of rotation of the pulley, whereby by means of the piezoelectric element it is possible to detect whether a leno wire passed through the wire eye of the wire guide along the piezoelectric element passes through. In an alternative embodiment, a piezoelectric element is provided near the eyelet of the wire guide, wherein a detected signal is wirelessly transmitted to a control unit.
    [0020] In one embodiment, the pulley is a drive pulley drivably coupled to a motor, in particular an electric motor, the motor being synchronized with the weaving machine. For example, the motor can move in any direction and be synchronized with the weaving machine. In addition, the device comprises at least a second pulley, i.e. a driven pulley, wherein rotational axes of the pulleys are arranged parallel. In one embodiment, the second pulley has an identical design as the first pulley. In other embodiments, the second pulley differs in configuration, e.g. has a smaller or larger diameter and consequently a different number of notches, the first segment of the wire guide being received in different notches each time the wire guide passes the driven pulley. In one embodiment, a tubular motor is provided which is directly coupled to the driven pulley. In other embodiments, the drive pulley is coupled to the motor via a shaft, which shaft is housed in an axle housing in one embodiment.
    [0021] In one embodiment, a sensor is provided in a fixed position, which sensor is adapted to give a signal each time the wire guide passes the sensor. The sensor in one embodiment is a Hall sensor, and the wire guide is at least partly made of a magnetizable material, in particular made of steel. In an alternative embodiment, the sensor is a proximity switch that generates a signal when the wire comes close to the proximity switch. The sensor is used in one embodiment for a synchronization of the movement of the thread guide with a weaving machine, for example the sensor signal is transmitted to a control unit, which controls the motor coupled to the drive pulley.
    [0022] In one embodiment, a pair of wire guides is mounted on the endless support element, the wire guides of the pair of wire guides being distributed, in particular evenly distributed along the endless support element. In embodiments of the invention, all wire guides of the device are provided with a clamp and mounted on the endless support element by means of said clamp.
    [0023] According to a second aspect, a weaving machine is provided comprising a leno bond forming apparatus as described above. In one embodiment, at least two leno weave forming devices are provided, arranged on opposite sides of a fabric to form a selvedge.
    [0024] According to a third aspect, there is provided a method of manufacturing a leno bond forming apparatus, the apparatus comprising an endless support member and a wire guide mounted on the endless support member, the wire guide being mounted on the endless support member through a two-segment clamp such that the two segments of the wire guide clamp extend on opposite sides of the endless support member. The endless support element in embodiments of the invention is a toothed belt, wherein a tooth of the toothed belt is removed and the wire guide is fixed in the position of the removed tooth on the endless support element. Brief description of the drawings.
    [0025] Hereinafter, an embodiment of the invention is described in detail with reference to the drawings. Throughout the drawings, like elements are designated by like reference numerals. In the schematic drawings: Figure 1 shows in a perspective view a first embodiment of an apparatus for forming a leno weave in a weaving machine. Figure 2 is a perspective view of a detail of Figure 1 on an enlarged scale. Figure 3 shows an endless support element of the device of Figure 1 together with wire guides mounted thereon in a perspective view. Figure 4 shows the endless support element of Figure 3 in a front view. Figure 5 is a detail V of Figure 4 on an enlarged scale. Figure 6 is a plan view of a wire guide mounted on the endless support member of Figure 3; Figure 7 is a cross-sectional view of the wire guide mounted on the endless support member of Figure 6 . Figure 8 is a perspective view of a lower portion of the apparatus of Figure 1 showing a drive pulley. Figure 9 is a sectional view showing a driven pulley and a sensor of a second embodiment of an apparatus similar to Figure 1. Figure 10 shows in a perspective view a third embodiment of an apparatus for forming a leno weave in a weaving machine. Detailed Description of Embodiments of the Invention.
    [0026] Figure 1 shows a device 1 according to the invention in which two leno threads 2, 3 are lifted and lowered alternately to form a leno weave by twisting the leno threads 2, 3 around each other to bind a weft thread 4 in the leno threads 2, 3 . The device 1 is to be mounted on a weaving machine, for example a lance weaving machine, an air jet weaving machine or any type of weaving machine, only one reed 5 of the weaving machine being shown schematically in figure 1. Figure 2 is a perspective view of a detail of figure 1 on enlarged scale.
    [0027] The device 1 is in one embodiment arranged in the area of outer edges of a fabric 8, for example the outer edge on the weft insertion side of the fabric or on the outer edge on the opposite side of the fabric, or in a central area of the weaving machine to produce leno bonds between two tissues. In one embodiment, two or more devices 1 are arranged side by side on an outer edge of the fabric.
    [0028] To move the leno wires 2, 3, the device 1 includes an endless support member 6 and a pair of wire guides 7 mounted evenly distributed on the endless support member 6, each wire guide 7 being adapted to hold a leno wire 2, 3 between a wire stock (not shown) and a fabric 8.
    [0029] The apparatus further includes a drive pulley 9 and a driven pulley 10 having parallel shafts 94, 104, the drive pulley 9 and the driven pulley 10 being collectively referred to as pulleys 9, 10. When mounted on the weaving machine, in the embodiment shown. , the axes 94, 104 of the pulleys 9, 10 are arranged parallel to a pulling direction of the warp threads and the leno threads are indicated by an arrow in figure 1, which pulling direction is also referred to as warp thread direction or leno thread direction.
    [0030] The endless support element 6 is supported by the two pulleys 9, 10 and the thread guides 7 are guided along an elongate endless path, thereby the leno wires 2, 3 passed through the thread guides 7 are twisted around each other to form a weft thread 4 in to tie the leno wires 2, 3.
    [0031] In one embodiment, the wire supply for the leno wires 2, 3 includes fixed bobbins (not shown), the endless support member 6 being driven to move a plurality of turns in one direction, and then driven to move a plurality of turns in the reverse. direction to avoid twisting the leno wires 2, 3 too much in the area opposite the fabric, i.e. a rear area of the weaving machine.
    [0032] In another embodiment, the wire supply for the leno wires 2,3 comprises rotatably arranged bobbins (not shown), e.g. as known from US3698441, wherein the endless support element 6 can be driven to move in one direction only.
    [0033] The drive pulley 9, which is the lower pulley in the embodiment shown, is driven by an electric motor 11, which electric motor 11 is separate from a main drive of the weaving machine (not shown) and a drive of the shed-forming device (not shown). ) is being sent. The electric motor 11, in one embodiment, is a stepper motor, which is electrically controlled and can be driven in both directions of rotation. In one embodiment, the stepper motor is driven in an open loop. Alternatively or in addition to the open loop control, a signal from a position sensor 17 (see Figure 9 and described in detail below) can be used for feedback control of the stepper motor position. A synchronization of the device 1 and the weaving machine in one embodiment is set and controlled according to a program so that the leno threads 2, 3 move and intersect at an expected moment in the weaving cycle. In the embodiment, the drive pulley 9 is the lower pulley. The drive pulley 9 is connected to the electric motor 11 by means of a shaft 24 (see Fig. 8) housed in a shaft housing 12 .
    [0034] The shaft housing 12 further functions as a support for a housing 13 of the pulleys 9,10. In the embodiment shown, two fixed guide elements 14 are mounted on the housing 13 of the pulleys 9, 10, each guide element 14 contains a bent wire. In an alternative embodiment, the two guide elements are integrally formed. The leno wires 2, 3 are wired through an opening in the housing 13 and are guided to the wire guides 7 via the guide members 14 . By means of the guide elements 14, the leno wires 2, 3 coming from the wire supplies are prevented from making contact with the endless support element 6 and/or the pulleys 9, 10, especially when a wire guide 7 is in the upper position or the lower position. . In one embodiment, additional guide elements (not shown), such as round wires, are provided near the opening in the housing 13 through which the leno wires 2,3 are wired, to prevent the leno wires 2, 3 from coming into contact with the opening in the housing 13 and can be damaged by the housing 13.
    [0035] The housing 13 is further provided with a nipple for connection to an air supply (not shown), the nipple 15 being connected to a blower 18 adapted to blow away dust 15 near one of the pulleys. 9, 10 would accumulate. In figure 2 two such blowers 18 are shown. In an alternative embodiment, two blowers are provided distributed in the vertical direction, one near the driven pulley 10, which in the embodiment shown is the upper pulley, and one near the drive pulley 9, which in the embodiment shown is the lower pulley. In other embodiments, only one blower is provided.
    [0036] On a front side of the housing 13, as best seen in figure 2, two at least substantially vertical bars 19 are provided to prevent an operator from being caught by the moving endless support element 6 and/or by the wire guides 7 .
    [0037] The endless support element 6 in the embodiment shown is an endless toothed belt, and the pulleys 9, 10 are provided with a plurality of evenly spaced notches 90, 100 adapted to receive the teeth 60 of the toothed belt.
    [0038] Figures 3 to 8 show the endless support element 6 together with the wire guides 7 mounted thereon in a perspective view, a front view, on an enlarged scale, in a plan view and in a sectional view, respectively.
    [0039] As best seen in Figures 3, 6 and 7, the wire guides 7 are each provided with a first end with a wire eye 70 and a second end with a clamp 71 for clamping the wire guide 7 to the endless support member 6. The clamps 71 each have a first segment 72 and a second segment 73, the endless support element 6 being inserted between the first segment 72 and the second segment 73. When the wire guide 7 is clamped to the endless support element 6, the clamp 71 makes contact at least on an inside of the endless support element 6 with the first segment 72 and on an outside of the endless support element 6 with the second segment 73. As a result, the clamp has 71 has a large contact area with the endless support element 6, so that the endless support element 6 is not damaged by the clamp 71, during the fixing and as well and more importantly during the operation of the device 1.
    [0040] In the embodiment shown, the clamps 71 are each attached to the endless support element 6 by means of a binding wire 16 having a base 160 and two flexible legs 161. As shown in Fig. 7, the two segments 72, 73 of the clamp 71 are and the endless support element 6 is provided, for example, each with two through holes 74, 64 for receiving the two legs 161 of the binding wire 16 . The binding wire 16 is inserted from an inside of the endless support element 6 so that the base 160 is arranged on the inside of the endless support element 6 and the legs 161 are inserted into the through holes 74, 64 of the clamp 71 and the endless support element 6 . After insertion, the distal ends of the legs 161 are bent towards each other and towards the endless support element 6.
    [0041] The wire eye 70 protrudes from a front side of the endless support member 6. The wire guides 7 are each L-shaped with a first end provided with the wire eye 70 and a second end provided with the clamp 71, which are arranged at an angle to are arranged from each other, which angle is preferably greater than 90°, for instance an angle between 100° and 110°, whereby a distance of the wire eye 70 from the endless support element 6 increases.
    [0042] In the embodiment shown, a hollow insert 75 (see Fig. 7) made, for example, of a wear-resistant ceramic material is mounted on the wire guide 7 and serves as the wire eye 70. The hollow insert 75 is provided with funnel-shaped entrance and exit regions for smooth guiding of the leno wires 2, 3.
    [0043] In the embodiment shown, the endless support element 6 is a toothed belt with a series of evenly distributed teeth 60, in which series of teeth 60 two teeth are missing. The two wire guides 7 are mounted on the endless support element 6 at the positions of the missing teeth. ; ;
    [0044] As shown in Fig. 5, the first segment 72 of the clip 71 arranged on an inner side of the endless support element 6 and the first segment 72 and the base 160 of the binding wire 16 protrude from the inner side of the endless support element 6 In the embodiment shown, an overall height and overall width of the first segment 72 and base 160 are less than a height and width of the teeth 60, whereby the first segment 72 and base 160 pass through a notch 90, 100 of the pulleys 9, 10 (see figures 1 and 2) can be received in circulation of the endless support element 6 while avoiding that the first segment 72 and the base 160 contact the notch 90, 100. This is advantageous to reduce wear .
    [0045] In the embodiment shown, the number of teeth 60 including the missing teeth of the endless support element 6 is an odd integer multiple of the number of notches 90 of the drive pulley 9. Consequently, upon circulation of the endless support element 6, the first segments 72 of the terminals 71 of the two evenly spaced wire guides 7 are each received in a corresponding notch 90 of the drive pulley 9, the two corresponding notches being displaced 180°. In the embodiment shown, as best seen in Figure 4, the toothed belt has a series of forty-two teeth, of which forty teeth are present and two teeth are missing, the wire guides 7 being mounted in the positions of the missing teeth. In this exemplary embodiment, the pulleys 9 and 10 each have fourteen notches, so that the ratio of teeth/notches is equal to three. In that embodiment, several teeth 60 of the endless support element 6 always engage with notches 90 of the drive pulley 9, so that slip is avoided and a reliable synchronization with a weaving machine can always be obtained. The number of teeth and notches is by way of example only. The toothed belt may also have an array with a different number of teeth, preferably an even number of teeth, for example forty-eight teeth, i.e. forty-six teeth and two missing teeth. Here, for a ratio of three, the pulleys 9, 10 each have sixteen notches.
    [0046] An odd integer multiple, for example a ratio of teeth/notches equal to three, offers the advantage that a sufficient shed formation between the leno wires 2, 3 can be obtained, and that the rotational speed of the drive motor 11 remains quite low. In a typical use, the endless support element 6 is moved half a revolution during each weaving cycle, so that in the example at a ratio of three, during each weaving cycle, the drive motor 11 rotates at 1.5 revolutions. As a result, the rotational speed of the driving motor 11 makes starting, stopping or reversing the direction of rotation of the driving motor 11 easier.
    [0047] An even integer multiple, e.g. a teeth/notch ratio equal to four, can offer the advantage that the drive motor 11 can be controlled more easily. In this example, the drive motor 11 rotates two revolutions each weaving cycle, so that after each weaving cycle, the drive motor 11 returns to the same position, allowing easier control of the drive motor 11, especially when the motor 11 is steered in two different directions of rotation.
    [0048] Figure 8 is a perspective view of a lower portion of the apparatus 1 of Figure 1 showing a drive pulley 9 together with an endless support member 6 and a wire guide 7 mounted thereon. As shown in Fig. 8, in the embodiment shown, the drive pulley 9 is provided with two pulley sheaves 91, 92. As explained above, in the embodiment shown, in each circulation, the first segment 72 of the clamp 71 of each wire guide 7 is received in a associated notch 90. In case the above ratio is equal to three, then during each subsequent circulation of the endless support element 6, each wire guide 7 will be received by one of the two notches displaced 180°. In order to avoid interference of the wire guides 7 with the pulley sheaves 91, 92, the pulley sheaves 91, 92 are provided with two openings 93, which openings 93 are aligned circumferentially with the associated notches 90. As shown in figures 1 and 2, the driven pulley 10 in the embodiment shown is not provided with pulley sheaves. In an alternative embodiment, the driven pulley 10 is also provided with pulley sheaves, the pulley sheaves also being apertured to avoid interference around the wire guides 7.
    [0049] In the embodiment shown in Figure 8, a leno wire detector 20 is provided, e.g. a piezoelectric element, which is mounted between the hollow insert 75 and a segment 76 of the wire guide 7 . By means of the piezoelectric element 20, it can be detected whether a leno wire 3 is present in and is guided through the wire eye 70 of the wire guide 7, because such a leno wire 3 causes vibrations on ; the piezoelectric element 20. Such a detected signal! ’ can be transferred wirelessly to a controller. In other embodiments, other wire detectors are provided, for example a wire detector with slats such as is used in a chain guard. For example, in an alternative embodiment, use is made for this purpose of a piezoelectric element which can contact a leno wire as it passes past the piezoelectric element and which is mounted on a distal end of the shaft 24 driven by the motor 11, which shaft 24 functions as the axis of rotation of the pulley 9 . In an alternative embodiment, a wire detector may be mounted near the wire supply, particularly near a wire bobbin to detect if leno wire is being pulled from the bobbin.
    [0050] Fig. 9 is a sectional view of an upper part of a second embodiment of an apparatus 1 for forming a leno weave in a weaving machine, which is similar to the apparatus of Fig. 1. For the same or similar elements, reference is made to the above description. Fig. 9 shows the driven pulley 10 and a sensor 17, which sensor 17 is adapted to give a signal each time a wire guide 7 passes the sensor 17 . The sensor 17 is fixed in position on the housing 13 of the device 1, wherein in the embodiment shown, the sensor 17 is mounted to detect the absence or presence of the wire guide 7 in the upper position. For example, the sensor 17 is a Hall sensor, which may be small and suitable for detecting a wire guide 7 or a portion of the wire guide 7 made of metal that passes by the sensor 17 . In one embodiment, the signal from the sensor 17 is used to provide position information to a control unit (not shown) used to control the electric motor 11 (see Figure 1) which drives the endless support element 6 synchronously with the weaving machine. .
    [0051] As shown in Fig. 9, in the embodiment, the driven pulley 10 is mounted via bearings 23 on a shaft 22 to be rotatable about said shaft 22, the shaft 22 being fixed in position in the housing 13 . In other embodiments, the shaft 22 is rotatably mounted in the housing 13 and the pulley is fixed on the shaft 22 . The shaft 24 can be mounted in the housing 13 in a similar manner as the shaft 22.
    [0052] [0052] Figure 10 shows in a perspective view a third embodiment of an apparatus 1 for forming a leno weave in a weaving machine, which is similar to the apparatus of figure 1. For the same or similar elements, reference is made to the above description. In contrast to the embodiment shown in Figure 1, two sensor devices are provided, namely a sensor 17, for example a Hall sensor, which is adapted to give a signal every time a wire guide 7 passes the sensor 17, and a wire detector 21 to detect the absence and/or detect the presence of a leno wire 2, 3. In the embodiment shown, the wire detector 21 is a non-contact wire detector comprising a transmitter 210 and a receiver 212, which are attached to the two vertical bars 19, respectively. In use, the transmitter 210 sends a signal and the receiver 212 receives the signal, wherein the presence of a leno wire 2,3 between the transmitter 210 and the receiver 212 causes a measurable interruption of the signal. The wire detector 21 makes it possible to check whether a leno wire 2,3 passes through the wire detector 21 when the wire guides 7 are moved through the endless support element 6 . The sensor 17 and the ; wire detector 21 can be used together to verify that a leno wire 2, 3 is present and interrupt the signal from the wire detector 21 just before the wire guide 7 reaches its top position, which position is detected by the sensor 17 and/or to verify whether a leno wire 2, 3 is present and the signal from the wire detector 21 interrupts just after the wire guide 7 has left its uppermost position, which position was detected by the sensor 17.
    [0053] In the embodiment shown, the drive pulley 9 and the driven pulley 10 have the same size and number of notches 90, 100. In an alternative embodiment (not shown), the lower pulley may have a larger diameter and a greater number of notches than the upper one. pulley. This ensures that the leno wires will intersect closer to the lower pulley than the upper pulley. correct timing is ensured by the drive pulley. In the embodiments of figures 1 to 10, the endless support element 6 is supported by two pulleys 9,10. In alternative embodiments, the endless support member may be supported by more than two pulleys, for example three pulleys, one of which is a drive pulley and the other driven pulleys.
    [0054] In the embodiments of Figs. 1 to 10, two wire guides 7 are shown which are evenly distributed along the endless support element 6 . In an alternative embodiment, a plurality of pairs of wire guides 7 can be provided, which at ; preferably evenly distributed on the circumference of the endless ; support element 6. In another alternative embodiment, three thread guides can be arranged along the endless support element, the drive motor 11 being controlled during each weaving cycle, so that a shed formation between the leno threads 2, 3 can be obtained with one leno thread in the upper position, while the two other leno wires are in the bottom position, or with one leno wire in the bottom position, while the other two leno wires are in the top position. In yet another alternative, four wire guides can be arranged evenly spaced along the endless support member, or two pairs of wire guides can be arranged side by side and evenly spaced along the endless support member.
    [0055] In one embodiment (not shown) a push button is provided which communicates with the control unit controlling the motor 11 . In one embodiment, the push button is mounted in an easily accessible position, e.g. at the bottom front of the housing 13 of the device 1. Alternatively or additionally, the push button may be integrated into the display connected to the control unit. To allow an operator to simply provide the device 1 with leno wires, the operator can briefly press the push button. Then the signal from the push button controls the motor 11 such that the control unit brings the wire conductors 7 into an easily accessible wiring position. For example, if the operator provides new leno wires 2, 3 that are not twisted, the operator can press the push button for a long time so that the number of twists of the leno wires 2, 3 stored in the control unit is reset to zero.
    权利要求:
    Claims (15)
    [1]
    An apparatus for forming a leno bond, comprising an endless support element (6) guided along an elongate endless path and a wire guide (7) mounted on the endless support element (6), the endless support element (6) supported by a pulley (9, 10) and wherein the thread guide (7) is adapted to guide a leno thread to a fabric (8), characterized in that the thread guide (7) is provided with a first segment (72) to to mount the wire guide (7) on the endless support element (6), the first segment (72) extending on an inner side of the endless support element (6), and the pulley (9, 10) is provided with a notch (90, 100), wherein the endless support element (6) and the pulley (9, 10) are adapted to each other so that upon a circulation of the endless support element (6), the first segment (72) in the recess (90, 100) of the pulley (9, 10) is received.
    [2]
    The leno bond forming device according to claim 1, characterized in that the wire guide (7) comprises a clamp (71) having a first segment (72) extending on an inner side of the endless support element (6) and a second segment (73) extending on an outside of the endless support element (6).
    [3]
    3. Apparatus for forming a leno bond according to . claim 2, characterized in that the clamp (71) is fixed to the endless support element (6) by means of a binding wire (16) having a base (160) and two flexible legs (161) or by means of a U-shaped fixing element with two legs,
    wherein each leg is threaded to mate with a nut.
    [4]
    A leno bond forming device according to claim 1, 2 or 3, characterized in that the pulley (9) is provided with a pulley sheave (91, 92), the pulley sheave (91, 92) having an opening (93). which is adapted to receive the wire guide (7) upon circulation of the endless support element (6), the opening (93) in the circumferential direction of the pulley (9) being aligned with the notch (90, 100).
    [5]
    A leno bond forming device according to any one of claims 1 to 4, characterized in that the endless support element (6) is a toothed belt with a series of evenly spaced teeth, in which series of teeth one tooth is missing, the wire guide ( 7) is mounted on the toothed belt at the position of the missing tooth, in particular the teeth (60) being rounded and in particular having a semi-circular shape.
    [6]
    The leno bond forming device according to claim 5, characterized in that the pulley (9, 10) is provided with a plurality of evenly spaced notches (90, 100), wherein the number of teeth (60) including the missing tooth of the ; 25 toothed belt is an integer multiple of the number of notches (90, 100) of the pulley (9, 10), in particular an odd integer multiple of the number of notches (90, 100).
    [7]
    A leno bond forming device according to any one of claims 1 to 6, characterized in that the wire guide (7) is provided with a wire eye (70) with a wear-resistant surface,
    in particular, a hollow insert (75) made of a wear-resistant ceramic material is mounted on the wire guide (7) and serves as the wire eye (70).
    [8]
    The leno bond forming device according to claim 7, characterized in that the wire guide (7) is L-shaped with a first end provided with the wire eye (70) and a second end provided with the first segment (72), wherein the first end and the second end are arranged at an angle to each other, in particular the angle between the first end and the second end being greater than 90°.
    [9]
    A leno bond forming device according to any one of claims 1 to 8, characterized in that at least one wire detector (20, 21) is provided for detecting the absence and/or presence of a leno wire (2, 3) through the thread guides (7).
    [10]
    A leno bond forming device according to any one of claims 1 to 9, characterized in that the pulley (9) is a drive pulley drivably coupled to a motor, in particular an electric motor (11), wherein the motor is synchronized with the weaving machine.
    [11]
    Device for forming a leno bond according to any one of claims 1 to 10, characterized in that a sensor (17) is provided fixedly in position, said sensor (17) being adapted to give a signal each time the thread guide ( 7) passes the sensor (17).
    [12]
    Apparatus for forming a leno bond according to claim 11, characterized in that the sensor (17) is a proximity switch or a Hall sensor, and preferably the wire guide (7) is made at least partly from a magnetizable material, in particular made from steel.
    [13]
    A leno bond forming device according to any one of claims 1 to 12, characterized in that a pair of wire guides (7) is mounted on the endless support member (6), the wire guides (7) of the pair of wire guides being distributed along the endless support element (6).
    [14]
    A weaving machine comprising a device (1) for forming a leno weave according to any one of claims 1 to 13.
    [15]
    A method of manufacturing a device (1) for forming a leno bond, the device (1) comprising an endless support element (6) and a wire guide (7) mounted on the endless support element (6), characterized in that that the wire guide (7) is fixed to the endless support element (6) by a clamp with two segments (72, 73) so that the two segments (72, 73) of the clamp (71) of the wire guide (7) are aligned opposite sides of the endless support element (6).
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    同族专利:
    公开号 | 公开日
    EP3896201A4|2021-10-20|
    WO2021209197A1|2021-10-21|
    EP3896201A1|2021-10-20|
    BE1028192A1|2021-10-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3698441A|1970-06-19|1972-10-17|Strake Maschf Nv|Device for forming a selvage|
    DE10034355A1|2000-07-14|2002-01-24|Picanol Nv|Slim unit crossing pairs of warp threads for weaving, by twisting them together, comprises timing belt driving outside of oval recirculator belt carrying thread eyes|
    EP1179623A1|2000-08-09|2002-02-13|Promatech S.p.A.|Device for forming the leno heald weave in weaving looms|
    法律状态:
    2022-02-02| FG| Patent granted|Effective date: 20211213 |
    优先权:
    申请号 | 申请日 | 专利标题
    EP20169468.4A|EP3896201A1|2020-04-14|2020-04-14|Device for forming a leno weave in a weaving machine|
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