Yarn pressing structure of yarn splicing device, yarn splicing device and winding device

Abstract

A yarn pressing structure (100) presses the first and second yarn ends in a yarn splicing device (26), wherein the yarn pressing structure comprises a front plate (90) and a yarn pressing component (80). The yarn pressing component (80) comprises: a first pressing rod (82) for pressing the first yarn end in cooperation with a front surface (90a); a second pressing rod (83) for pressing the second yarn end in cooperation with the front surface (90a); a connecting portion (84) for connecting the second pressing rod (83) to the first pressing rod (82) in a manner that allows the second pressing rod (83) to move in a direction approaching and away from the front surface (90a); and a coil spring (86) for applying force to the second pressing rod (83) so as to approach the front surface (90a).

Description

Technical Field

[0001] The present invention relates to a yarn pressing structure of a yarn splicing device, a yarn splicing device and a winding device. Background Art

[0002] Conventionally, there is known a yarn joining device that joins a first yarn end portion and a second yarn end portion by the action of compressed air.

[0003] In such a piecing device, for example, as described in Japanese Patent Gazette No. 6478687, a piecing device is provided which is supported to rotate around a rotating shaft and can be rotated by an independent driving device. The piecing device pulls two yarns back to the two yarn ends for piecing until they are located in the piecing passage of the piecing device along with an optimal overlapping length. Summary of the invention

[0004] However, in the yarn splicing device as described above, a yarn pressing member for pressing the first and second yarn ends is sometimes mounted. In this case, there is a possibility that the shape of the yarn splice cannot be unstable by the yarn pressing member pressing the first and second yarn ends in the same manner.

[0005] The present invention has been made in view of the above-mentioned actual situation, and an object of the present invention is to provide a yarn pressing structure of a yarn splicing device, a yarn splicing device, and a winding device capable of improving the shape of a yarn splice.

[0006] The yarn pressing structure of the yarn splicing device of the present invention presses the first and second yarn ends in the yarn splicing device for performing the splicing of the first yarn end and the second yarn end by the action of compressed air, and is characterized in that the yarn pressing structure comprises: an abutting member having an abutting surface extending in a direction parallel to the yarn running direction; and a yarn pressing member arranged in a manner that can move in a direction approaching and leaving the abutting surface, and pressing the first and second yarn ends in cooperation with the abutting surface by abutting against the abutting surface, and the yarn pressing member comprises: a first pressing rod that presses the first yarn end in cooperation with the abutting surface; a second pressing rod that presses the second yarn end in cooperation with the abutting surface; a connecting portion that connects the second pressing rod to the first pressing rod in a movable manner; and a force applying member that applies a force in a manner that the second pressing rod approaches the abutting surface relative to the first pressing rod. In addition, the second pressing rod is urged by the force applying member, so that it is arranged at a position closer to the abutting surface than the first pressing rod.

[0007] In the yarn pressing structure of the yarn splicing device, the second pressing rod is movably connected to the first pressing rod, and a force is applied to the second pressing rod so as to bring the second pressing rod close to the abutting surface. As a result, it is easy to make the first and second pressing rods contact the abutting surface in the same manner, and the first yarn end and the second yarn end can be pressed in the same manner by the yarn pressing member cooperating with the abutting surface. Therefore, a neat yarn splice can be formed, and the shape of the yarn splice can be improved.

[0008] In the yarn pressing structure of the yarn joining device of the present invention, the urging member may be an elastic member. In this case, the elastic force of the elastic member can be utilized to urge the second pressing rod toward the contact surface.

[0009] In the yarn pressing structure of the yarn joining device of the present invention, the elastic member may be a coil spring. Thus, the elastic force of the coil spring can be utilized to apply force to bring the second pressing rod closer to the abutment surface.

[0010] In the yarn pressing structure of the yarn joining device of the present invention, the urging member may be a magnet. In this case, the magnetic force can be utilized to urge the second pressing rod to approach the abutment surface.

[0011] In the yarn pressing structure of the piecing device of the present invention, the first pressing rod may limit the first yarn end by a wedge-shaped gap formed between the pressing rod and the abutting surface by the front end side of the first pressing rod abutting the abutting surface, and the second pressing rod may limit the second yarn end by a wedge-shaped gap formed between the pressing rod and the abutting surface by the front end side of the second pressing rod abutting the abutting surface. In this case, the first and second yarn ends are not completely pressed in cooperation with the abutting surface, but can be restricted by the wedge-shaped gap. As a result, the yarn can be prevented from escaping from the working range of the piecing device due to its own contraction force, and when the yarn needs to be guided (moved) for piecing, the abutment based on the first and second pressing rods can be not released, and the yarn can be moved with a stronger force. Thus, the number of times the first and second pressing rods are driven can be reduced to the minimum required, thereby suppressing fatigue degradation of the first and second pressing rods and improving working efficiency by suppressing the number of movements of components in the joint operation.

[0012] In the yarn pressing structure of the yarn splicing device of the present invention, the connecting portion may include: a shaft portion provided on the first pressing rod, supporting the second pressing rod shaft so as to be able to swing relative to the first pressing rod in the direction of approaching and leaving the abutting surface; a convex portion provided on the first pressing rod; and a hole portion formed on the second pressing rod, into which the convex portion is inserted so as to be able to move a certain amount in the direction of approaching and leaving the abutting surface. With such a configuration, it is possible to achieve the connection of the second pressing rod to the connecting portion of the first pressing rod in a movably connected manner with a simple structure without using other stopper components or the like.

[0013] In the yarn pressing structure of the yarn splicing device of the present invention, the force applying member may include an elastic member as a coil spring, one end of the coil spring is engaged with the second pressing rod, and the other end of the coil spring is engaged with a plate-shaped member fixed to the shaft. With such a configuration, the force applying member that applies force in a manner that brings the second pressing rod close to the abutting surface can be specifically realized.

[0014] The yarn splicing device of the present invention is provided with the yarn pressing structure. In the yarn splicing device, the above-mentioned effects such as the shape of the yarn splice can be improved are achieved.

[0015] The winding device of the present invention comprises the yarn splicing device, a yarn supplying device supporting a yarn supplying bobbin at a predetermined position, a winding section, an unwinding assisting device, a tension applying device, and a yarn monitoring device. The winding device has the above-mentioned effect of being able to improve the shape of the yarn splice, etc.

[0016] According to the present invention, it is possible to provide a yarn pressing structure of a yarn splicing device, a yarn splicing device, and a winding device that can improve the shape of a yarn splice. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view showing the automatic winder.

[0018] Figure 2 Yes means Figure 1 Side view of the winding unit.

[0019] Figure 3 Yes means Figure 2 Front view of the connector device.

[0020] Figure 4 Yes means Figure 3 A three-dimensional view of the yarn pressing component.

[0021] Figure 5 Yes means Figure 3 A three-dimensional view of the yarn pressing component.

[0022] Figure 6 Yes means Figure 3 A three-dimensional view of the yarn pressing component.

[0023] Figure 7 (a) means Figure 4 A top view of the first pressing rod. Figure 7 (b) means Figure 4 A front view of the first pressing rod. Figure 7 (c) means Figure 4 A bottom view of the first pressing rod.

[0024] Figure 8 (a) means Figure 4 A top view of the second pressing rod. Figure 8 (b) means Figure 4 A side view of the second pressing rod.

[0025] Fig. 9 (a) means Figure 4 A three-dimensional view of a plate-like component. Fig. 9 (b) means Figure 4 A three-dimensional diagram of a coil spring.

[0026] Fig.10 Yes through Figure 3 The figure explains the situation where the first and second yarn ends are pressed by the cooperation of the yarn pressing member and the abutment surface, and is a plan cross-sectional view showing a part of the yarn splicing device in an enlarged manner. DETAILED DESCRIPTION

[0027] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and repeated descriptions are omitted.

[0028] like Figure 1 As shown, the automatic winder 1 includes a plurality of winding units (winding devices) 3 arranged in an array, a machine control device 5, and a doffing device 7. The machine control device 5 can communicate with each of the plurality of winding units 3. The operator of the automatic winder 1 can manage the plurality of winding units 3 in a unified manner by appropriately operating the machine control device 5. Each winding unit 3 unwinds the yarn Y from the yarn supply tube SB and winds the yarn Y on the winding tube WB while traversing the yarn Y, thereby forming a package P. When the package P in each winding unit 3 becomes fully wound (a state in which a predetermined amount of yarn is wound), the doffing device 7 moves to the position of the winding unit 3, removes the fully wound package, and places an empty winding tube WB.

[0029] like Figure 2As shown, the winder unit 3 includes a unit control section 10, a yarn supply device 12, and a winding section 14. The unit control section 10 includes, for example, a CPU (Central Processing Unit) and a ROM (Read Only Memory). The ROM stores a program for controlling each component of the winder unit 3. The CPU executes the program stored in the ROM.

[0030] The yarn supply device 12 supports a yarn supply bobbin SB placed on a transport tray (not shown) at a predetermined position. The yarn supply device 12 unwinds the yarn Y from the yarn supply bobbin SB and pulls the yarn Y out of the yarn supply bobbin SB. The yarn supply device 12 supplies the yarn Y. The yarn supply device 12 is not limited to a transport tray type device, and may be a magazine type device, for example.

[0031] The winding section 14 includes a cradle 16 and a winding drum 18. The cradle 16 supports the winding tube WB (or the package P) so as to be rotatable by sandwiching the winding tube WB. The winding drum 18 causes the yarn Y to traverse on the surface of the package P and rotates the package P. The winding drum 18 is driven to rotate by a drum drive motor (not shown). The winding drum 18 is driven to rotate while the outer periphery of the package P is in contact with the winding drum 18, so that the package P is driven to rotate. A spiral traverse groove is formed on the outer peripheral surface of the winding drum 18. The yarn Y unwound from the yarn supply tube SB is wound on the surface of the package P while traversing at a certain width through the traverse groove. In this way, a package P with a certain winding width can be formed.

[0032] Each winding unit 3 is provided with, in order from the yarn supply device 12 side, an unwinding assisting device 20, a tension applying device 22, a tension detecting device 24, a yarn splicing device 26, and a yarn monitoring device 28 in the yarn path between the yarn supply device 12 and the winding section 14. A first catching and guiding device 30 and a second catching and guiding device 32 are arranged near the yarn splicing device 26.

[0033] The unwinding assisting device 20 prevents the yarn Y unwound from the yarn supply bobbin SB from being excessively swung by centrifugal force, and allows the yarn Y to be properly unwound from the yarn supply bobbin SB. The tension applying device 22 applies a predetermined tension to the traveling yarn Y. In the present embodiment, the tension applying device 22 is a fence-type device in which movable comb teeth are arranged relative to fixed comb teeth.

[0034] The tension detecting device 24 detects the tension of the traveling yarn Y between the yarn supplying device 12 and the winding section 14. The yarn splicing device 26 splices the yarn Y on the yarn supplying device 12 side with the yarn Y on the winding section 14 side when the yarn Y between the yarn supplying device 12 and the winding section 14 is disconnected for some reason.

[0035] The yarn monitoring device 28 monitors the state of the yarn Y traveling in the yarn path and detects the presence of a yarn defect based on the monitored information. The yarn defect may be at least one of abnormal thickness of the yarn Y, foreign matter contained in the yarn Y, and yarn breakage.

[0036] The first catching and guiding device 30 can rotate from a standby position on the yarn supply device 12 side to a catching position on the winding section 14 side. The first catching and guiding device 30 catches the yarn Y at the catching position and guides it to the yarn splicing device 26. The second catching and guiding device 32 can rotate from a standby / catching position on the yarn supply device 12 side to a guiding position on the winding section 14 side. The second catching and guiding device 32 catches the yarn Y at the standby / catching position and guides it to the yarn splicing device 26.

[0037] Next, the above-mentioned joint device 26 will be described in more detail.

[0038] Figure 3 2 is a front view showing the yarn splicing device 26. In the following description, for convenience, the winding section 14 side is referred to as the upper side, the yarn supply device 12 side is referred to as the lower side, the travel path (yarn path) side of the yarn Y relative to the yarn splicing device 26 is referred to as the front side, and the opposite side is referred to as the rear side. In addition, the yarn end of the yarn Y on the winding section 14 side is referred to as the first yarn end, and the yarn end of the yarn Y on the yarn supply device 12 side is referred to as the second yarn end.

[0039] like Figure 3 As shown, the joint device 26 includes a front plate (abutment component) 90, an untwisting portion 40 including a first untwisting tube component 41A and a second untwisting tube component 41B, a joint portion 50 for jointing by jetting of compressed air, a pair of yarn shifting rods (not shown) that can rotate in a manner clamping the untwisting portion 40, a yarn pressing component 80 including a first and a second pressing rod 82, 83 that can rotate in a manner clamping the joint portion 50, and an air guide 94.

[0040] The front plate 90 is in the shape of a plate with the front-to-rear direction being the thickness direction. The front surface (contact surface) 90a of the front plate 90 is formed into a plane extending in a direction parallel to the yarn running direction. The joint portion 50 is provided on the front surface 90a of the front plate 90. On the front surface 90a of the front plate 90, a first yarn end introduction port as an opening of the first untwisting tube component 41A is provided on the upper side of the joint portion 50, and a second yarn end introduction port as an opening of the second untwisting tube component 41B is provided on the lower side of the joint portion 50.

[0041] A first guide portion 45A is provided on the upper side of the first untwisting tube member 41A, and a second guide portion 45B is provided on the lower side of the second untwisting tube member 41B on the front surface 90a of the front plate 90. The first and second guide portions 45A, 45B are arranged to face each other across the joint portion 50. The first and second guide portions 45A, 45B guide the yarn Y guided by each of the first and second catching and guiding devices 30, 32, respectively.

[0042] The first untwisting tube component 41A takes in the first yarn end portion by the action of compressed air to untwist. The second untwisting tube component 41B takes in the second yarn end portion by the action of compressed air to untwist. The joint portion 50, by the action of compressed air, twists the first yarn end portion untwisted by the first untwisting tube component 41A and the second yarn end portion untwisted by the second untwisting tube component 41B together to form a joint. When the yarn ends are twisted together in the joint portion 50, the first and second yarn ends are pulled out from the first and second untwisting tube components 41A and 41B by a yarn pulling rod (not shown) while being held by a clamp (not shown), and are pressed near the joint portion 50 by the first and second pressing rods 82 and 83.

[0043] The yarn pressing component 80 is connected to a driving source such as a stepping motor (not shown) via a cam link mechanism 95. The yarn pressing component 80 is provided so as to be movable in a direction approaching and leaving the front surface 90a of the front plate 90 by the driving force of the driving source. That is, the first and second pressing rods 82 and 83 of the yarn pressing component 80 are rotated (rotated) by the driving force of the driving source so as to make the front end side approach and leave the front surface 90a of the front plate 90. The yarn pressing component 80 abuts against the front surface 90a of the front plate 90, thereby pressing the first and second yarn ends in cooperation with the front surface 90a. The first and second pressing rods 82 and 83 may also be urged toward the side of the front end side approaching the front plate 90 by, for example, a helical torsion spring (not shown). The air guide 94 is a component for guiding the injected compressed air in the joint portion 50, and is provided so as to block a part of the upper and lower openings of the joint chamber in the joint portion 50 into which the first and second yarn ends are introduced.

[0044] In the yarn splicing device 26 thus constructed, first, the first and second yarn removing levers (not shown) and the first and second pressing levers 82 are rotated to the front plate 90 side. As a result, the upper yarn Y and the lower yarn Y guided by the first and second catching and guiding devices 30, 32 are pulled closer to the untwisting section 40 side. Then, the upper yarn Y and the lower yarn Y are held by the clamping member, and in this state, are cut by the cutter. The first yarn end portion is fed into the interior of the first untwisting tube component 41A, and the second yarn end portion is fed into the interior of the second untwisting tube component 41B. The injection of compressed air is started in the first and second untwisting tube components 41A, 41B, and the first and second yarn ends are untwisted by the action of the compressed air.

[0045] Next, the first and second yarn removing rods (not shown) rotate further. As a result, the first yarn end and the second yarn end are pulled out from each of the first and second untwisting tube components 41A and 41B, while being pressed near the joint portion 50 by the first and second pressing rods 82 and 83. The injection of compressed air begins in the joint portion 50, and the untwisted first yarn end and the second yarn end are twisted together under the action of the compressed air. Next, the first and second yarn removing rods (not shown) and the first and second pressing rods 82 and 83 rotate in opposite directions. Then, the clamping member releases the holding of the upper yarn Y and the lower yarn Y. As a result, the connected yarn Y returns to the travel path on the front side of the joint device 26. The yarn pressing component 80 and the front plate 90 constitute a yarn pressing structure 100 for pressing the first and second yarn ends in the joint device 26.

[0046] Next, the structure of the yarn pressing member 80 will be described in detail.

[0047] like Figures 4 to 6 As shown in at least one of the figures, the yarn pressing member 80 includes a first pressing rod 82, a second pressing rod 83, a connecting portion 84, a plate-like member 85, and a coil spring 86.

[0048] like Figure 4 to Figure 7 As shown in at least one of the above, the first pressing rod 82 is a component for suppressing the first yarn end. The first pressing rod 82 is plate-shaped. The first pressing rod 82 has a first rod body 82A that abuts against the front plate 90, and a cam link mechanism 95 that is continuous and fixed to the base end side of the first rod body 82A (see Figure 3 ) of the fixing portion 82B. The first rod body 82A is in the shape of a plate with the yarn traveling direction as the thickness direction. A contact portion 82C is provided on the front end side of the first rod body 82A to contact the front plate 90. The fixing portion 82B is connected to the front side of the base end side of the first rod body 82A, and after being bent 90° from the first rod body 82A and extending upward, it is bent 90° and extended to the rear side.

[0049] like Figures 4 to 6 as well as Figure 8 As shown in at least one of the above, the second pressing rod 83 is a component for suppressing the second yarn end. The second pressing rod 83 is arranged in a manner of being spaced apart from the first pressing rod 82 along the yarn travel direction at a predetermined interval. The second pressing rod 83 is in the shape of a plate with the yarn travel direction as the thickness direction. A contact portion 83C is provided at the front end side of the second pressing rod 83 to contact the front plate 90.

[0050] The connection portion 84 connects the second pressing rod 83 to the first pressing rod 82 so as to be movable in the direction of approaching and separating from the front surface 90a of the front plate 90. The connection portion 84 has a shaft portion 84A, a convex portion 84B, and a hole portion 84C.

[0051] The shaft portion 84A is provided on the first pressing rod 82, and the second pressing rod 83 is axially supported so as to be able to swing in the direction approaching and leaving the front surface 90a relative to the first pressing rod 82. The shaft portion 84A is a shaft body with a circular cross section and an axial direction with the yarn running direction as an axial direction, which is vertically provided on the upper surface of the fixing portion 82B of the first pressing rod 82. A threaded hole (not shown) is formed inside the shaft portion 84A along its axial direction. The shaft portion 84A is inserted into the hole 83D formed on the base end side of the second pressing rod 83 in a manner of protruding through the hole 83D.

[0052] The convex portion 84B is provided on the first pressing rod 82. The convex portion 84B is provided on the upper surface of a vertical plate portion 82D which is connected to the upper portion of the fixing portion 82B of the first pressing rod 82 and is bent 90 degrees and extended upward, so as to protrude upward with a rectangular cross section.

[0053] The hole 84C is a circular hole formed in the second pressing rod 83 and into which the convex portion 84B is inserted. In the example shown in the figure, the hole 84C is provided at the front end side of the hole 83D in the second pressing rod 83. When the convex portion 84B is inserted into the hole 84C, a predetermined gap is formed between the inner surface of the hole 84C and the convex portion 84B. That is, the hole 84C is such that the convex portion 84B can be inserted in a manner that allows it to move a certain amount in the direction of approaching and leaving the front surface 90a of the front plate 90.

[0054] The first pressing rod 82 and the second pressing rod 83 are connected by the connecting portion 84. At the same time, the second pressing rod 83 can rotate only a certain amount (within the range in which the convex portion 84B can move in the hole 84C) with respect to the first pressing rod 82, with the base end as the center.

[0055] like Figure 6 as well as Fig. 9 As shown in (a), the plate-like member 85 is a small plate-like member with the yarn running direction as the thickness direction. A hole 85D for inserting a screw N is formed on the plate-like member 85. The plate-like member 85 is fastened to the upper end of the shaft portion 84A by the screw N, thereby being integrated with the first pressing rod 82.

[0056] like Figure 6 as well as Fig. 9As shown in (b), the coil spring 86 is an elastic member (force member) that applies force in a manner that causes the second pressing rod 83 to approach the front surface 90a. The coil spring 86 is installed between the second pressing rod 83 and the plate-shaped member 85 around the shaft portion 84A. One end of the coil spring 86 is engaged with an engagement hole 83E formed in the second pressing rod 83. The other end of the coil spring 86 is engaged with an engagement hole 85E formed in the plate-shaped member 85. According to such a coil spring 86, the second pressing rod 83 is forced relative to the first pressing rod 82 so that the front end side of the second pressing rod 83 approaches the front surface 90a.

[0057] Back to Figure 3 to Figure 6 The yarn pressing member 80 is driven by a driving source such as a stepping motor (not shown) via a cam link mechanism 95, and the first and second pressing rods 82 and 83 rotate integrally in such a manner that the contact portions 82C and 83C at their front end sides approach the front surface 90a of the front plate 90. The contact portions 82C and 83C of the first and second pressing rods 82 and 83 contact the front surface 90a, and the first and second yarn ends are clamped by the contact portions 82C and 83C and the front surface 90a. The first and second yarn ends are limited by a wedge-shaped small gap K (refer to Fig.10 ). Thus, the first and second yarn ends are pressed by the yarn pressing member 80 in cooperation with the front surface 90a. At this time, even if the contact portions 82C and 83C cannot contact the front surface 90a at the same time, the first and second pressing rods 82 and 83 are separated from each other and flexibly connected, so they contact the front surface 90a in the same manner.

[0058] As described above, in the yarn pressing structure 100, when the yarn pressing member 80 and the front surface 90a cooperate to press the first and second yarn ends, the first and second pressing rods 82 and 83 can be easily brought into contact with the front surface 90a in the same manner, and the first and second yarn ends can be pressed in the same manner. Therefore, a neat joint of the yarn Y can be formed, and the shape of the joint of the yarn Y can be improved. The strength of the joint of the yarn Y can be improved.

[0059] The yarn pressing structure 100 includes a coil spring 86 as an elastic member as a biasing member. In this case, the second pressing rod 83 can be biased so as to approach the front surface 90a by utilizing the elastic force of the coil spring 86 as the elastic member.

[0060] In the yarn pressing structure 100, the first and second pressing rods 82 and 83 restrict the first and second yarn ends by the wedge-shaped gap K. In this case, the first and second pressing rods 82 and 83 do not completely press the first and second yarn ends in cooperation with the front surface 90a, but can restrict them by the wedge-shaped gap K. As a result, the yarn Y is prevented from coming out of the working range of the yarn splicing device 26 due to its own contraction force, and further, when the yarn Y needs to be guided (moved) for the yarn splicing, the contact based on the first and second pressing rods 82 and 83 is not released, and the yarn Y can be moved as long as a certain degree of strong force is applied to the yarn Y. As a result, the number of times the first and second pressing rods 82 and 83 are driven can be reduced to the minimum required, so the number of times the first and second pressing rods 82 and 83 are operated is reduced, so that fatigue degradation can be suppressed, and it can also be expected that the improvement of working efficiency brought about by suppressing the number of movements of the components in the splicing operation can be expected.

[0061] In the yarn pressing structure 100, the connecting portion 84 includes a shaft portion 84A, a convex portion 84B and a hole portion 84C. With this configuration, the connecting portion 84 that movably connects the second pressing rod 83 to the first pressing rod 82 can be realized with a simple structure without using other stopper components.

[0062] In the yarn pressing structure 100, one end of the coil spring 86 is engaged with the second pressing rod 83, and the other end of the coil spring 86 is engaged with the plate member 85. With such a configuration, a biasing member that biases the second pressing rod 83 toward the front surface 90a can be specifically realized.

[0063] The yarn joining device 26 includes the yarn pressing structure 100. In the yarn joining device 26, the above-mentioned effects such as the shape of the yarn Y being joined can be improved are achieved.

[0064] The winder unit 3 includes the yarn joining device 26. In the winder unit 3, the above-mentioned effects such as the shape of the yarn Y being joined can be improved are achieved.

[0065] As mentioned above, although embodiment was described, one aspect of the present invention is not limited to the above-mentioned embodiment.

[0066] In the above embodiment, the yarn pressing structure 100 is applied to the yarn splicing device 26 of the winding unit 3, but the yarn pressing structure 100 can also be applied to the yarn splicing device of the winding unit of the spinning machine, or the yarn splicing device of the work carriage moving between multiple winding units. The above embodiment can also have a magnet as a force applying member. In this case, the magnetic force can be used to apply force in a manner that the second pressing rod 83 approaches the front surface 90a.

Claims

1. A yarn pressing structure of a yarn splicing device, wherein in a yarn splicing device for splicing a first yarn end portion and a second yarn end portion by compressed air, the first and second yarn ends are pressed, wherein: The yarn pressing structure has: an abutting member having an abutting surface extending in a direction parallel to a traveling direction of the yarn; and The yarn pressing member is provided so as to be movable in a direction approaching and moving away from the abutting surface, and presses the first and second yarn ends in cooperation with the abutting surface by abutting against the abutting surface. The yarn pressing component comprises: a first pressing rod, cooperating with the abutting surface to press the first yarn end portion; a second pressing rod, cooperating with the abutting surface to press the second yarn end portion; a connecting portion that movably connects the second pressing rod to the first pressing rod; and The urging member urges the second pressing rod to approach the contact surface side relative to the first pressing rod.

2. The yarn pressing structure of the yarn splicing device according to claim 1, characterized in that: The second pressing rod is urged by the urging member so as to be arranged at a position closer to the contact surface than the first pressing rod.

3. The yarn pressing structure of the joint device according to claim 2, characterized in that: The force applying component is an elastic component.

4. The yarn pressing structure of the yarn splicing device according to claim 3, characterized in that: The elastic component is a coil spring.

5. The yarn pressing structure of the yarn splicing device according to claim 2, characterized in that: The force applying component is a magnet.

6. The yarn pressing structure of the yarn joining device according to any one of claims 1 to 4, characterized in that: The first pressing rod restricts the first yarn end by a wedge-shaped gap, and the wedge-shaped gap is formed between the first pressing rod and the abutting surface by the front end side of the first pressing rod abutting against the abutting surface. The second pressing rod restricts the second yarn end portion by a wedge-shaped gap formed between the second pressing rod and the abutment surface when the front end side of the second pressing rod abuts against the abutment surface.

7. The yarn pressing structure of the yarn splicing device according to claim 5, characterized in that: The first pressing rod restricts the first yarn end by a wedge-shaped gap, and the wedge-shaped gap is formed between the first pressing rod and the abutting surface by the front end side of the first pressing rod abutting against the abutting surface. The second pressing rod restricts the second yarn end portion by a wedge-shaped gap formed between the second pressing rod and the abutment surface when the front end side of the second pressing rod abuts against the abutment surface.

8. The yarn pressing structure of the yarn joining device according to any one of claims 1 to 4, characterized in that: The connecting portion comprises: a shaft portion, provided on the first pressing rod, axially supporting the second pressing rod so as to be able to swing relative to the first pressing rod in a direction approaching and moving away from the abutting surface; a convex portion, provided on the first pressing rod; and The hole portion is formed in the second pressing rod, and the convex portion is inserted in a manner that the convex portion can move a certain amount in a direction approaching and separating from the contact surface.

9. The yarn pressing structure of the yarn splicing device according to claim 5, characterized in that: The connecting portion comprises: a shaft portion, provided on the first pressing rod, axially supporting the second pressing rod so as to be able to swing relative to the first pressing rod in a direction approaching and moving away from the abutting surface; a convex portion, provided on the first pressing rod; and The hole portion is formed in the second pressing rod, and the convex portion is inserted in a manner that the convex portion can move a certain amount in a direction approaching and separating from the contact surface.

10. The yarn pressing structure of the yarn splicing device according to claim 6, characterized in that: The connecting portion comprises: a shaft portion, provided on the first pressing rod, axially supporting the second pressing rod so as to be able to swing relative to the first pressing rod in a direction approaching and moving away from the abutting surface; a convex portion, provided on the first pressing rod; and The hole portion is formed in the second pressing rod, and the convex portion is inserted in a manner that the convex portion can move a certain amount in a direction approaching and separating from the contact surface.

11. The yarn pressing structure of the yarn splicing device according to claim 8, characterized in that: The force applying component is a coil spring, One end of the coil spring is engaged with the second pressing rod. The other end of the coil spring is engaged with a plate-shaped member fixed to the shaft portion.

12. The yarn pressing structure of the yarn splicing device according to claim 10, characterized in that: The force applying component is a coil spring, One end of the coil spring is engaged with the second pressing rod. The other end of the coil spring is engaged with a plate-shaped member fixed to the shaft portion.

13. A joint device, characterized in that: The yarn joining device includes the yarn pressing structure according to any one of claims 1 to 12.

14. A winding device, comprising the splicing device according to claim 13, characterized in that: The winding device includes: a yarn supplying device that supports a yarn supplying bobbin at a predetermined position; a winding section; an unwinding assisting device; a tension applying device; and a yarn monitoring device.

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