• 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:
    Wire clamp for a gripper (1) of a rapier weaving machine having a movable lever (3) having a first contact surface (4) for cooperating with a second contact surface (6) of a counter element (5) opposite the first contact surface (4) the first contact surface (4) is provided with an inwardly bent portion (13), which inwardly bent portion (13) is bent about an axis (A) parallel to a longitudinal direction of the movable lever (3) and which inwardly bent portion (13) extends longitudinally along said axis (A), the width of the inwardly bent portion (13) being at least twice its height. A movable lever for such a wire clamp and a rapier weaving machine with such a wire clamp.
    公开号:BE1027704B1
    申请号:E20200106
    申请日:2020-10-06
    公开日:2021-09-09
    发明作者:Ronny Coulembier；Eddy Verclyte；Dries Demeersseman
    申请人:Picanol Nv；
    IPC主号:
    专利说明:

    [0001] The invention relates to a wire clamp with a movable lever for a gripper of a rapier weaving machine, a movable lever for a wire clamp, a gripper and a rapier weaving machine.
    [0002] As is well known, rapier weaving machines typically include two grippers for conveying weft threads through a shed, for example referred to as a gripper gripper and a gripper gripper, the gripper grippers being designed to guide a weft yarn through the first half of a shed, and the gripper grippers designed to guide a weft thread through the second half of the shed after having picked up the weft thread from the gripper.
    [0003] To clamp a weft thread during transport, wire clamp grippers are known, the wire clamps having a movable lever rotatably mounted on the gripper body, which movable lever is urged towards a counter element, which counter element is mounted on the gripper body or part of the gripper body.
    [0004] EPO 207 533 A1 discloses a wire clamp with a movable lever in the form of a needle of circular cross-section and a counter element in the form of a bit, which is provided with a groove, preferably with a V-shaped groove, disposed on its top surface opposite the needle. Summary of the Invention.
    [0005] It is the object of the present invention to provide a movable wire clamp lever for a gripper of a rapier weaving machine, a wire clamp with a movable lever, a gripper and a rapier weaving machine which allow a safe clamping of various weft threads without damage to cause the weft.
    [0006] According to a first aspect of the invention, a movable lever for a wire clamp for a gripper of a rapier weaving machine is provided, the movable lever having a first contact surface for cooperating with a second contact surface of a counter element arranged opposite the first contact surface. the first contact surface comprising an inwardly bent portion, the inwardly bent portion being bent about an axis parallel to a longitudinal direction of the movable lever and the inwardly bent portion extending longitudinally along said axis, the width of the part bent inwards is at least twice its height.
    [0007] In the context of the application, the expression "a bent portion extends longitudinally along an axis" is used to describe that the bent portion has a longitudinal extension in the direction of said axis, said axis also serving as longitudinal of the bent part is indicated. Further, in the context of the application, a curved portion having a width at least twice its height is also referred to as a flat curved portion.
    [0008] The movable lever with a flat inwardly curved part allows a reliable clamping, wherein a weft thread can be clamped between the movable lever and a counter element with a clamping force with an at least substantially uniform force distribution along the width of a clamping zone of the wire clamp and with only a small deflection, so that a risk of damage or breakage of the weft thread is reduced.
    [0009] A cross-section of the movable lever is selected by the person skilled in the art such that the lever has sufficient rigidity and light weight. In embodiments of the invention, a cross-section of the movable lever is in the shape of a rectangle, in particular a rounded rectangle.
    [0010] In one embodiment, the curvature of the inwardly curved portion is in the shape of an oval or elliptical arc, in particular in the shape of an oval or elliptical arc, which in one embodiment is further symmetrical with respect to a median plane of the inward curved part. In the context of the invention, a plane extending longitudinally of the inwardly bent portion and intersecting the inwardly bent portion through its apex is referred to as a median plane of the bent portion. In particular embodiments of the movable lever, the curvature of the part bent inwards has the shape of an arc of a circle. This allows, inter alia, a simple and cost-efficient manufacture.
    [0011] In one embodiment, the curvature of the curved portion extends between opposite edge regions of the first contact surface. In other embodiments, the first contact surface is provided at its edge regions with two planar surface portions, the inwardly curved portion being disposed between the two planar surface portions. The provision of flat surfaces on the edge regions allows for easy manufacture while avoiding sharp edges. In addition, a movable lever having a curved portion and a flat surface portion can be combined with different counter elements having a complementary curved portion at the second contact surface or having a flat second. have contact surface.
    [0012] In alternative embodiments, the first contact surface is provided with at least two grooves extending longitudinally along at least a portion of the movable lever. In one embodiment, the grooves are provided in the region of the inwardly bent portion extending from a surface thereof. In other embodiments, the grooves are provided at least partially adjacent to the inwardly curved portion. The grooves allow a combination of the movable lever with a counter element having cantilevered ribs, the position, number, shape and size of the grooves being selected to be complementary to the position, number, shape and size of the cantilevered ribs. In one embodiment, the first contact surface is provided with an even number of grooves, which grooves are arranged symmetrically with respect to the central plane of the inwardly bent part. As explained above, in the context of the invention, a plane extending in the longitudinal direction of the inwardly bent portion and intersecting the inwardly bent portion through its apex is referred to as the median plane of the inwardly bent portion.
    [0013] [0013] In yet another embodiment of the movable lever, the first contact surface is provided at its edge regions with two planar surface portions, the inwardly curved portion being arranged between the two planar surface portions, and wherein the first contact surface is further provided. of two grooves extending longitudinally along at least part of the movable lever, which grooves are arranged on both sides and symmetrically with respect to the median plane of the inwardly bent part, each of which has one of the two grooves between the inwardly bent part curved part and one of the flat surface parts is fitted. This movable lever can be combined with various different counter elements for reliable clamping of weft threads.
    [0014] In embodiments of the movable lever, an inner edge of each of the two grooves is displaced inwardly to an outer edge of said groove. In other words, the inner edge and the outer edge extend the curvature of the bent portion. In one embodiment, the displacement is chosen such that the curved part, the inner edge and the outer edge are arranged on a common circular arc.
    [0015] According to a second aspect, there is provided a gripper wire clamp of a rapier weaving machine comprising a movable lever having a first contact surface having a flat inwardly curved portion and a counter element having a second contact surface opposite the first contact surface applied, contains.
    [0016] In one embodiment, the second contact surface of the counter element is flat. In other embodiments, the second contact surface includes an outwardly bent portion, which outwardly bent portion is complementary in shape to the inwardly bent portion of the movable lever. Such a wire clamp is advantageous to enable good clamping with an at least substantially uniform force distribution, while avoiding strong deformation of the weft wire, which can lead to damage to the weft wire or wire breakage.
    [0017] In one embodiment, the counter element is part of a gripper body. In other embodiments, the counter element is a slat. The slat can be mounted on the gripper body. In one embodiment, the slat can be mounted on the gripper body so as to be replaceable, for example, in the event of wear.
    [0018] According to a third aspect, a gripper for a rapier weaving machine comprising a gripper body and a wire clamp is provided.
    [0019] In one embodiment, the movable lever is at least partially resiliently deformable and forced against the counter element by its internal restoring force. In other embodiments, the movable lever is pivotally mounted on the gripper body, the movable lever being urged toward the counter element by at least one elastic element. This provides a rigid movable lever and high clamping forces. In particular, in one embodiment, the movable lever is a two-sided lever, one end having the first contact surface, the opposite end cooperating with the elastic element to force the first end toward the counter element.
    [0020] In one embodiment, the counter element is part of the gripper body. In other embodiments, the counter element is a slat mounted on the gripper body, wherein in particular at least one elastic support element is provided on the gripper body, and at least a portion of the slat is supported opposite the second contact surface on the gripper body via the at least one elastic support element. The elastic support element influences a clamping force applied to the weft thread. In one embodiment, the at least one elastic support element and/or the slat are replaceable, wherein several different exchangeable slats and/or several different exchangeable elastic support elements are provided, which allow an adaptation of the gripper for different weft threads and/or different weaving conditions, for example different weaving speeds. to make.
    [0021] According to a fourth aspect, there is provided a rapier weaving machine comprising a gripper with a wire clamp according to one of the embodiments described above. The gripper with the weft thread clamp according to the invention is used in particular as a gripper gripper, also called bringer gripper, which guides a weft thread through a first half of a shed. Brief description of the drawings. |
    [0022] Hereinafter, embodiments of the invention are described in detail with reference to the drawings. Throughout the drawings, the same or similar elements are designated by the same reference numerals. Figure 1 shows a gripper in an exploded view.
    [0023] Figure 1 shows in exploded view a gripper 1, in particular a gripper gripper of a gripper weaving machine (not shown) and figure 2 shows in a side view selected parts of the gripper 1 of figure 1.
    [0024] The gripper 1 has a gripper body 7, a wire clamp 2, a cover plate 20 and a guide element 21 arranged between the gripper body 7 and the cover plate 20 . It will be apparent to those skilled in the art that the guide element 21 is only optional and in other embodiments, the guide element 21 is omitted. In an alternative embodiment, the gripper body 7 and the cover plate 20 can be made in one piece.
    [0025] The shown gripper body 7 is in the form of a profile, which can be attached in a known manner to a lance or a gripper belt (not shown) for moving the gripper 1 through a shed.
    [0026] The wire clamp 2 includes a movable lever 3 having a first contact surface 4 and a counter element 5 provided with a second contact surface 6 arranged opposite the first contact surface 4.
    [0027] The movable lever 3 is mounted on the gripper body 7 to be rotatable about a pivot axis 10. In the embodiment shown, the movable lever 3 is a two-sided lever, which has two arms 8,9 arranged on opposite sides of a pivot axis 10. of the movable lever 3 are provided. A first arm 8 of the movable lever 3 is provided with the first contact surface 4 and is urged towards the counter element 5 by an elastic element 11, which in the embodiment shown is in the form of a spring, which acts on the second arm 9 of the lever. movable lever 3 acts.
    [0028] In the embodiment shown, the counter element 5 is a slat mounted on the gripper body 7 . More specifically, in the embodiment shown, the counter element 5 is mounted on the gripper body 7 in the region of the second contact surface 6 and is supported via three elastic support elements 12, which elastic support elements 12 support the counter element 5 and at least part of the counter element 5 provided with the second contact surface 6 is forcing towards the movable lever 3 . The number of elastic support elements 12 is by way of example only and in other embodiments more or less than three elastic support elements 12 are provided, for example one or two elastic support elements 12 are provided. In the embodiment shown, three elastic support elements 12 and the counter element 5 are replaceable, wherein in one embodiment the elements are replaced by wear if necessary. In other embodiments, several different exchangeable counter elements 5 and/or several different exchangeable elastic support elements 12 are provided which allow an adaptation of the gripper 1 for different weft threads and/or different weaving conditions.
    [0029] Figure 3 shows a first embodiment of a wire clamp 2 with a movable lever 3 and a counter element in cross section along a line II-II in figure 2.
    [0030] As shown in Fig. 3, the first contact surface 54 of the movable lever 3 is provided with an inwardly bent portion 13 extending longitudinally along the movable lever 3, i.e. perpendicular to the drawing plane. More specifically, the inwardly bent portion 13 extends longitudinally along an axis A, which axis A is parallel to a longitudinal direction of the movable lever 3. The inwardly bent portion 13 has a smooth surface and has a width W which is at least twice its height H. The width W of the inwardly bent portion 13 is defined as its extension perpendicular to the longitudinal direction between its opposite ends, i.e. a horizontal extension in the drawing plane. The height H is defined as its extension between an apex 30 and edges 31 of the inwardly bent part 13, i.e. a vertical extension in the drawing plane shown. A plane extending in the longitudinal direction of the inwardly bent portion 13 and intersecting the inwardly bent portion 13 through its apex 30 is referred to as the median plane M of the inwardly bent portion 13 . In the illustrated embodiment, the inwardly bent part 13 is symmetrical with respect to the central plane M, and the central plane M is a central plane of the cross-section of the movable lever 3. More specifically, in the illustrated embodiment, the curvature of the inwardly bent part 13 in the form of an arc of a circle. This allows simple and cost-efficient manufacture. In an alternative embodiment (not shown) the inwardly curved portion 13 is not perfectly symmetrical, but slightly asymmetrical with respect to the central plane M. In another alternative embodiment (not shown), the central plane M in line is not symmetrical with a central plane of the cross-section of the movable lever, but slightly displaced from the central plane of the cross-section of the movable lever.
    [0031] The inwardly bent part 13 is bent about the axis A, which axis A is also referred to as the central axis A of the inwardly bent part 13 in the form of a circular arc. The central axis A lies in the central plane M. In the embodiment shown, the movable lever 3 has, next to the inwardly bent part 13, a rounded rectangular cross-section, which is preferably also symmetrical with respect to the central plane M.
    [0032] In case the inwardly bent part 13 is in the form of an arc of a circle, the width-height ratio W/H depends on the central angle and the radius R. In the embodiment shown, a central angle is between about 40 ° and about 70°, and in particular about 55°.
    [0033] In the embodiment shown in Figure 3, the second contact surface 6 on the counter element 5 is provided with an outwardly bent portion 14, which outwardly bent portion 14 is complementary in shape to the inwardly bent portion 13 of the movable lever 3 In the embodiment shown, the curvature of the inwardly bent portion 13 and the curvature of the outwardly bent portion 14 are both in the shape of a | circular arc with a common central axis A, where a | radius of curvature of the inwardly bent portion 13 is substantially equal to the radius of curvature of the outwardly bent portion 14 to allow the inwardly bent portion 13 and the outwardly bent portion 14 to touch in the absence of a weft thread. In one embodiment, the radius of curvature of the inwardly bent portion 13 is slightly larger than the radius of curvature of the outwardly bent portion 14, so that a small gap of constant thickness is formed between the two bent portions 13 and 14 for clamping a weft thread. .
    [0034] Figure 4 shows a second embodiment of a wire clamp 2 with a movable lever 3 and a counter element 5 in cross section along the line II-II in figure 2. The counter element 5 shown in figure 4 is the same as that shown in figure 3. The movable lever 3 shown in Figure 4 differs from the movable lever 3 of Figure 3 in that the first contact surface 4 next to the inwardly bent portion 13 is further provided with two flat surface portions 15 at its edge regions, whereby it is bent inwardly. part 13 is arranged between the two flat surface parts 15. As shown in Fig. 4, in case the counter element 5 is not provided with corresponding flat surface parts, when the wire clamp 2 is closed, the movable lever 3 only comes into contact with the counter element 5 with the inwardly bent part 13. It will be apparent to to those skilled in the art that the movable lever 3 shown in figure 3 can be combined in an alternative embodiment with a counter element having only a flat second contact surface, wherein when the wire clamp 2 is closed the movable lever 3 only comes into contact with such counter element with the flat surface parts 15.
    [0035] Fig. 5 shows a third embodiment of a wire clamp 2 with a movable lever 3 and a counter element 5 in cross section along the line TI-IT in Fig. 2. The counter element 5 shown in Fig. 4 is the same as that shown in Fig. 3 and the movable lever 3 shown in Fig. 5 is similar to that shown in Fig. 3, wherein the first contact surface 4 is provided with an inwardly bent portion 13 and the second contact surface 6 is provided with an outwardly bent portion 14.
    [0036] Fig. 6 shows a fourth embodiment of a wire clamp 2 with a movable lever 3 and a counter element 5 in cross section along the line II-II in Fig. 2, the fourth embodiment being similar to the embodiment shown in Fig. 4, the first contact surface 4 is provided with an inwardly bent portion 13 and two flat surface portions 15 provided at the edge regions of the inwardly bent portion 13.
    [0037] In the embodiment shown, the inner edges 17 of the grooves 16 are displaced inwardly towards the outer edges 18 of the grooves 16, in other words, the inner edges 17 of the grooves 16 arranged closer to the median plane M are displaced inwardly towards the outer edges 18 of the grooves 16 arranged further away from the central plane M. More specifically, in the embodiment shown, the inner edges 17 and the outer edges 18 are arranged on a virtual circular arc extending the curvature of the inwardly curved portion 13 . This causes the outer edges 18 to also contact the outwardly bent portion 14 when the inwardly bent portion 13 comes into contact with the outwardly bent portion 14, in other words when the wire clamp 2 is in a closed state.
    [0038] As will be shown below, the movable lever 3 of the embodiment of figure 6 can be combined with several different counter elements 5 for clamping weft threads.
    [0039] Figure 7 shows a fifth embodiment of a wire clamp 2 with a movable lever 3 and a counter element 5 in cross-section along the line II-II in Figure 2. The movable lever 3 shown in Figure 7 is the same as that shown in Figure
    [0041] Figure 9 shows a seventh embodiment of a wire clamp 2 with a movable lever 3 and a counter element 5 in cross section along the line II-II in Figure 2. The movable lever 3 shown in Figure 9 is the same as that shown in Figure
    [0042] It will be apparent to those skilled in the art that the movable | lever 3 shown in figures 6 to 9 with various different counter elements 5 can be combined. In embodiments of the invention, several different exchangeable counter elements 5 in the form of slats are provided which allow an adaptation of the thread clamp 2 for different weft threads and/or different weaving conditions.
    [0043] Furthermore, it will be apparent to those skilled in the art that the various features described with respect to the various embodiments may be combined, in alternative embodiments, in any combination to provide further embodiments. These and other changes may be made to the embodiments in light of the above detailed description.
    权利要求:
    Claims (15)
    [1]
    Conclusions. 1, Gripper wire clamp (1) of a rapier weaving machine including a movable lever (3) and a counter element (5), the movable lever (3) has a first contact surface (4) to cooperate with a second contact surface (6) of the counter element (5) arranged opposite the first contact surface (4), characterized in that the first contact surface (4) is provided with an inwardly bent part (13), which inwardly bent part (13) is bent about a axis (A) parallel to a longitudinal direction of the movable lever (3) and said inwardly bent portion (13) extending longitudinally along said axis (A), the width of the inwardly bent portion (13) being at least twice its height.
    [2]
    Wire clamp according to claim 1, characterized in that a curvature of the inwardly bent part (13) is in the form of an arc of a circle.
    [3]
    Wire clamp according to claim 1 or 2, characterized in that the first contact surface (4) is provided at its edge regions with two flat surface parts (15), the inwardly bent part (13) being between the two flat surface parts (15). has been fitted.
    [4]
    Wire clamp according to claim 1 or 2, characterized in that the first contact surface (4) is provided with at least two grooves (16) extending longitudinally along at least a part of the movable lever (3).
    [5]
    Wire clamp according to claim 4, characterized in that the first contact surface (4) is provided with an even number of grooves (16), which grooves (16) are symmetrical to a center plane (M) of the inwardly bent part (13). are provided.
    [6]
    Wire clamp according to claim 1 or 2, characterized in that the first contact surface (4) is provided at its edge areas with two flat surface parts (15), the inward bent part (13) being between the two flat surface parts (15). and wherein the first contact surface (4) is provided with two grooves (16) extending longitudinally along at least a part of the movable lever (3), said grooves (16) on both sides and symmetrical to a center plane (M) of the inwardly bent portion (13), and wherein each one of the two grooves (16) is provided between the inwardly bent portion (13) and one of the plane surface portions (15).
    [7]
    Wire clamp according to claim 6, characterized in that an inner edge (17) of each of the two grooves (16) is displaced inwardly towards an outer edge (18) of said groove (16).
    [8]
    Wire clamp according to any one of claims 1 to 7, characterized in that the second contact surface (6) is provided with an outwardly bent portion (14), which outwardly bent portion (14) is complementary in shape to the inwardly bent portion. part (13) of the movable lever (3). |
    [9]
    Wire clamp according to one of claims 1 to 8, characterized in that the counter element (5) is a slat.
    [10]
    A movable wire clamp lever (2) for a gripper (1) of a rapier weaving machine, characterized in that the movable lever is a movable wire clamp lever (3) according to any one of claims 1 to 9.
    [11]
    A gripper for a rapier weaving machine comprising a gripper body (7) and a wire clamp (2) according to any one of claims 1 to 9.
    [12]
    Gripper according to claim 11, characterized in that the movable lever (3) is rotatably mounted on the gripper body (7), the movable lever (3) being urged towards the counter element (5) by means of at least one elastic element ( 11).
    [13]
    Gripper according to claim 11 or 12, characterized in that the counter element (5) is a slat, which slat is mounted on the gripper body (7).
    [14]
    Gripper according to claim 13, characterized in that at least one elastic support element (12) is provided on the gripper body (7), wherein at least a part of the slat opposite the second contact surface (6) on the gripper body (7) is supported via the at least one elastic support element (12).
    [15]
    A gripper weaving machine comprising a gripper according to any one of claims 11 to 14. |
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    同族专利:
    公开号 | 公开日
    WO2021094023A1|2021-05-20|
    EP3822400A1|2021-05-19|
    BE1027704A1|2021-05-19|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0207533A1|1985-04-09|1987-01-07|Picanol N.V.|Improved claws for weaving machine|
    EP0769580A2|1995-10-17|1997-04-23|Sulzer Rüti Ag|Thread retainer for a supply gripper|
    US7806148B1|2009-04-28|2010-10-05|Tsudakoma Kogyo Kabushiki Kaisha|Carrier rapier|
    法律状态:
    2021-10-06| FG| Patent granted|Effective date: 20210909 |
    优先权:
    申请号 | 申请日 | 专利标题
    EP19208882.1A|EP3822400A1|2019-11-13|2019-11-13|Moveable lever for a thread clamp for a gripper|
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