Winding device

Abstract

To provide a winding device that forms a package that can be taken without causing any deterioration in unwind quality.SOLUTION: A winding device 1 forms a yarn package Ps by winding yarn Y that is oscillated axially with respect to a bobbin Bw onto the bobbin Bw. The winding device 1 includes: a rotating unit 10 that rotates the bobbin Bw; an oscillation point guide 23; and a traverse device 24 that moves back and forth a traverse guide 241 along the axial direction to oscillate the yarn Y with the oscillation point guide 23 as the pivot. During the intermediate process from the start of winding the yarn Y onto the bobbin Bw to the completion of winding, the oscillation point guide 23 is positioned on the first direction side of the winding center, and the traverse guide 241 is moved back and forth at a slower speed in the second direction side than in the first direction side.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a winding device that winds a yarn that sways in the axial direction of a bobbin around the bobbin to form a package.

Background Art

[0002] Winding devices that wind fibers around a bobbin to form a package are known. For example, Patent Document 1 discloses a winding machine that forms a package with excellent unwinding properties.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when unwinding the yarn from the package, the yarn may be unwound in the axial direction of the bobbin (hereinafter referred to as horizontal unwinding). In this case, when using the package wound by the winding machine described in Patent Document 1, it can be unwound without problems. However, when horizontally unwinding the yarn from a symmetric package, there is a risk of poor unwinding due to the collapse of the winding state of the package during the unwinding process.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a winding device that can form a package capable of suppressing the occurrence of poor unwinding during the horizontal unwinding process.

Means for Solving the Problems

[0006] (1) The present invention is In a winding device that winds a yarn that sways in the axial direction of a cylindrical bobbin around the bobbin to form a package, A rotating part that rotates the bobbin about the axis of the bobbin, A twill swing fulcrum guide, A traversing device that reciprocates the yarn fed from the twill swing fulcrum guide and guided to the bobbin between one side and the other side in the traverse direction along the axial direction, and swings the yarn with the twill swing fulcrum guide as a fulcrum, Comprising, The traversing device reciprocates the yarn so that the speed of the yarn on the other side is slower than the speed on the one side in the middle process or the whole process from the start to the end of winding the yarn onto the bobbin, When the traversing device reciprocates the yarn so that the speed of the yarn on the other side is slower than the speed on the one side, the twill swing fulcrum guide is arranged on the one side rather than the center in the winding range of the bobbin along the axial direction.

[0007] According to the winding device described in (1) above, since the traversing guide reciprocates so that the speed on the other side is slower than the speed on the one side, the twill swing angle when swinging to the other side is smaller than the twill swing angle when swinging to the one side. For this reason, when unwinding the yarn from the other side in the traverse direction of the formed package, the rubbing between the unwound yarn and the yarn wound on the bobbin is reduced, and the occurrence of unwinding defects such as the yarn getting caught can be suppressed.

[0008] Incidentally, when the traverse guide reciprocates such that the speed in one direction is slower than the speed in the other direction, the winding tension of the yarn will be different between when the yarn is shaken in one direction and when it is shaken in the other direction. If the winding tension of the yarn is different between when it is shaken in one direction and when it is shaken in the other direction, there is a risk of deterioration in the quality of the package and poor unwinding during the unwinding process of sidewise unwinding. Therefore, when the traverse guide is reciprocating such that the speed in one direction is slower than the speed in the other direction, by offsetting the position of the shaking fulcrum guide from the center in the winding range of the bobbin along the axial direction to one direction side in the traverse direction, the winding length of the yarn can be made the same when the yarn is shaken in each of one direction side and the other direction side in the traverse direction. That is, the winding tension of the yarn when it is shaken in one direction side in the traverse direction and the winding tension of the yarn when it is shaken in the other direction side in the traverse direction become the same. For this reason, it is possible to form a package capable of suppressing the occurrence of poor unwinding during the unwinding process of sidewise unwinding.

[0009] (2) In the winding device of the present invention, when the traverse device reciprocates the yarn, it is preferable that the yarn is reciprocated so as to be parallel to the axial direction of the bobbin.

[0010] According to the winding device described in (2) above, a package wound by reciprocating the yarn so as to be parallel to the axial direction of the bobbin becomes a rectangular package, and it is possible to solve specific problems such as poor unwinding that can occur in such a rectangular package.

[0011] (3) In the winding device of the present invention, the shaking fulcrum guide is arranged at the center in the winding range of the bobbin along the axial direction, and is preferably arranged on one direction side from the center in the winding range of the bobbin along the axial direction when the traverse device reciprocates the yarn such that the speed in one direction is slower than the speed in the other direction.

[0012] According to the winding device described in the above (3), it is possible to suppress the occurrence of poor unwinding while maintaining the aesthetic appearance of the wound package.

[0013] (4) In the winding device of the present invention, The traversing device includes a traversing guide that engages with the yarn sent out from the twill oscillation fulcrum guide and guided to the bobbin, and is configured to be reciprocally movable in one direction side and the other direction side in the traversing direction. It is preferable that the traversing device further includes a ratio changing unit that reciprocally moves the traversing guide and can change the ratio of the moving speeds of the traversing guide on one direction side and the other direction side in the traversing direction.

[0014] According to the winding device described in the above (4), when the outermost diameter of the package changes as the winding of the yarn progresses, the ratio of the moving speeds of the traversing guide on one direction side and the other direction side in the traversing direction can be changed according to the outermost diameter of the package.

[0015] (5) The winding device of the present invention includes an acquisition unit that acquires information regarding the winding diameter of the package being formed. It is preferable that the ratio changing unit can change the ratio of the moving speeds of the traversing guide according to the information acquired by the acquisition unit.

[0016] According to the winding device described in the above (5), even if the winding of the yarn progresses and the outermost diameter of the package changes, the traversing guide can be moved at an optimal ratio between the speed on one direction side and the speed on the other direction side. Thereby, it is possible to form a package that can be unwound horizontally without causing poor unwinding.

[0017] (6) The winding device of the present invention preferably includes a position changing unit that changes the position of the twill oscillation fulcrum guide in the axial direction.

[0018] According to the take-up device described in (6) above, even when settings such as the take-up speed, the winding width of the package, or the moving speed of the traverse guide are different, or when the take-up speed, the winding width of the package, or the moving speed of the traverse guide changes during take-up, the twill oscillation fulcrum guide can be arranged at an optimal position. Therefore, the winding length of the yarn (i.e., the winding tension of the yarn) when the twill oscillation occurs on one side in the traverse direction and the other side in the traverse direction can be made the same, and a package that can be unwound horizontally without causing poor unwinding can be formed.

[0019] (7) In the take-up device of the present invention, it is provided with a position changing part for changing the position of the twill oscillation fulcrum guide in the axial direction, it is preferable that the position changing part changes the position of the twill oscillation fulcrum guide in the axial direction based on the ratio of the moving speed of the traverse guide.

[0020] According to the take-up device described in (7) above, even if the ratio of the speed to one side and the speed to the other side is changed, the position of the twill oscillation fulcrum guide is changed, so the winding length of the yarn when the twill oscillation occurs on one side and the other side in the traverse direction can be made the same.

[0021] (8) In the take-up device of the present invention, it is preferable that the intermediate process from the start to the end of winding the yarn onto the bobbin is the period from the start of winding the yarn onto the bobbin until the winding diameter of the package reaches a predetermined winding diameter.

[0022] According to the winding device described in the above (8), when the curvature of the package is small, the position of the twill swing fulcrum guide is offset, and when the curvature of the package increases, the position of the twill swing fulcrum guide is centered. When winding the yarn around a package with a large curvature in a state where the twill swing fulcrum guide is offset, the twill swing angle at one end of the bobbin in one direction in the traverse direction becomes large. When unwinding the yarn from the other direction side in the traverse direction of this package, rubbing of the yarn occurs. Therefore, by changing the position of the twill swing fulcrum guide according to the curvature of the package, rubbing of the yarn can be suppressed, and a package with good quality can be formed.

[0023] The winding device according to the present invention may be configured only with the configuration described in the winding device described in the above (1), or may be an arbitrary combination of the configuration described in the above (1) and the configuration described in any of the above (2) to (8) within a range where consistency can be achieved. When combining the configuration described in the above (1) and the configuration described in any of the above (2) to (8), within a range where consistency can be achieved, all or part of the configuration described in the above (1) and all or part of the configuration described in the above (2) to (8) can also be combined.

Effect of the Invention

[0024] According to the present invention, it is possible to provide a winding device that forms a package capable of suppressing the occurrence of unwinding failure in the unwinding process of horizontal winding and unwinding.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Embodiments for Carrying Out the Invention

[0026] Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The winding device according to this embodiment is a device for forming a package used in a false twisting machine.

[0027] (Configuration of the false twisting machine) FIG. 1 is a diagram showing the schematic configuration of a false twisting machine 100 according to this embodiment. The false twisting machine 100 is configured to be able to perform false twisting on a yarn Y made of synthetic fiber such as nylon (polyamide-based fiber). The false twisting machine 100 includes a yarn supply unit 101, a processing unit 102, and a winding unit 103.

[0028] The yarn supply unit 101 has a creel stand 101A that holds a plurality of yarn supply packages Ps. As will be described later, the yarn supply package Ps is formed by winding the yarn Y around a cylindrical bobbin. The yarn supply unit 101 unwinds the yarn Y from each of the plurality of yarn supply packages Ps. The yarn supply unit 101 supplies the unwound yarn Y to the processing unit 102.

[0029] The processing unit 102 performs false-twist processing on the yarn Y supplied from the yarn supply unit 101. Specifically, the processing unit 102 stretches the yarn Y supplied from the yarn supply unit 101 with a plurality of rollers to impart twist, heats it, and then cools it. Then, the processing unit 102 thermally fixes the yarn Y while relaxing it with a plurality of rollers and supplies it to the winding unit 103.

[0030] The winding unit 103 winds the yarn Ys after processing by the processing unit 102 onto a bobbin with a winder 103A to form a winding package Pw. In this specification, the yarn after processing is referred to as yarn Ys, and the yarn before processing is referred to as yarn Y for explanation.

[0031] In this embodiment, when the yarn supply unit 101 of the false-twist processing machine 100 unwinds the yarn Y from the yarn supply package Ps, it unwinds the yarn Y in the axial direction of the bobbin. Hereinafter, the unwinding of the yarn Y in the axial direction of the bobbin is referred to as horizontal unwinding. When performing horizontal unwinding, the winding state of the yarn on the yarn supply package Ps may collapse, and twist may occur, making efficient unwinding impossible. The winding device of this embodiment is a device that forms a yarn supply package Ps that is optimal for horizontal unwinding at the yarn supply unit 101 of the false-twist processing machine 100, and is a device in the previous process of the false-twist processing machine 100.

[0032] (Configuration of the winding device) FIG. 2 is a diagram showing a schematic configuration of the winding device 1 according to this embodiment. The winding device 1 is a device for winding the zigzagged yarn Y onto a bobbin Bw to form a yarn supply package Ps. The bobbin Bw of this embodiment is cylindrical, and at least the region on the outer peripheral surface of the bobbin Bw where the yarn Y is wound has a cheese shape (more specifically, a rectangular shape) in a plan view seen from a direction orthogonal to the axial direction.

[0033] In the following description, in the axial direction of the bobbin Bw held by the winding device 1, the direction from left to right on the plane of FIG. 2 is defined as the first direction, and the opposite direction is defined as the second direction. Also, when the yarn package Ps formed by the winding device 1 is unwound horizontally by the false-twist processing machine 100, it is unwound from the end side in the second direction. The first direction corresponds to the "one-direction side" of the present invention. The second direction corresponds to the "other-direction side" of the present invention.

[0034] The winding device 1 includes a rotating part 10 that rotates the bobbin Bw around its axial direction, and a yarn guiding device 20 that winds the yarn Y that sways in the axial direction of the bobbin Bw onto the bobbin Bw.

[0035] The rotating part 10 has a pair of cradle arms 11 and a contact roller 12. The pair of cradle arms 11 hold both end portions in the axial direction of the bobbin Bw with bobbin holders 11A, and enable the bobbin Bw to rotate via the bobbin holders 11A. Although not shown, a hook 11B for hanging the yarn Y on the bobbin Bw is provided on the bobbin holder 11A that holds the end portion of the bobbin Bw on the first direction side.

[0036] Also, as shown in FIG. 3, a slit S is formed along the outer peripheral surface at the end portion of the bobbin Bw on the first direction side. FIG. 3 is a diagram showing the unwinding direction of the yarn package Ps. In the slit S, for example, when hanging the yarn on a new bobbin Bw, or when storing the yarn Y after winding it around the bobbin Bw several times, the yarn Y can be hooked by the operator. Also, the operator connects the yarn by using the rear end of the yarn Y stored in the slit S and the front end of the yarn Y wound around the next bobbin Bw. When unwinding the yarn Y wound around the bobbin Bw, the yarn Y is unwound from the end portion on the side where the slit S is not formed.

[0037] At the start of winding the yarn Y, the contact roller 12 contacts the outer peripheral surface of the bobbin Bw and rotates in a fixed direction to rotate the bobbin Bw. Further, as the yarn Y is wound onto the bobbin Bw, the contact roller 12 contacts the outer peripheral surface of the supply package Ps and rotates in a fixed direction to rotate the supply package Ps. The contact roller 12 is driven by a drive motor (not shown).

[0038] The yarn hanging device 20 includes a yarn holding part 21, a yarn hanging arm 22, a twill swing fulcrum guide 23, a traverse device 24, and a control device 25.

[0039] The yarn holding part 21 sucks and holds the fed yarn Y. The yarn hanging arm 22 has a yarn locking part 22A at its tip. The yarn locking part 22A holds the yarn Y sucked and held by the yarn holding part 21. The yarn hanging arm 22 rotates about a rotation shaft 22B located at the end opposite to the yarn locking part 22A. By rotating about the rotation shaft 22B, the yarn hanging arm 22 brings the yarn locking part 22A closer to and away from the hook provided on the bobbin holder 11A described above. The yarn hanging arm 22 hooks the yarn Y on the hook at the timing when the yarn locking part 22A approaches the hook.

[0040] The twill swing fulcrum guide 23 is a guide that feeds out the yarn Y supplied from a device (such as a yarn feed roller) arranged on the upstream side (not shown) toward the bobbin Bw. A traverse device 24 described later is interposed between the twill swing fulcrum guide 23 and the rotating part 10, and the yarn Y from the twill swing fulcrum guide 23 is twilled by the traverse device 24. The twill swing fulcrum guide 23 is arranged at the center (hereinafter referred to as the winding center) in the winding range of the bobbin Bw along the axial direction. Further, the twill swing fulcrum guide 23 is configured to be movable by a motor or the like on a rail extending along the axial direction of the bobbin Bw, and the position in the axial direction of the bobbin Bw can be changed. The twill swing fulcrum guide 23 is moved so as to be arranged on the first direction side from the winding center until the winding diameter of the supply package Ps becomes a predetermined winding diameter after starting the winding of the yarn Y onto the bobbin Bw. Specifically, it is moved so as to be arranged on the first direction side from the winding center in the middle process from starting the winding of the yarn Y onto the bobbin Bw until the winding is completed. And when the winding is completed, the twill swing fulcrum guide 23 is moved so as to be arranged on the first direction side from the winding center.

[0041] The traverse device 24 is a device that engages with the yarn Y fed out from the twill swing fulcrum guide 23 and reciprocates a traverse guide 241 that guides such yarn Y to the bobbin Bw along the axial direction of the bobbin Bw to twill the yarn Y with the twill swing fulcrum guide 23 as a fulcrum. The traverse device 24 shown in this embodiment uses what is called a belt traverse.

[0042] The traverse device 24 has a traverse guide 241 and an endless timing belt 242 that moves the traverse guide 241.

[0043] The timing belt 242 is stretched over the driven pulleys 31, 32 and the drive pulley 33 so as to form a triangular shape. The driven pulleys 31, 32 are arranged side by side along the axial direction of the bobbin Bw. The drive pulley 33 is arranged on the side opposite to the rotating part 10 with respect to the driven pulleys 31, 32. The drive pulley 33 is rotationally driven by the traverse guide drive motor 30. When the drive pulley 33 rotates, the timing belt 242 moves.

[0044] The traverse guide 241 is supported by the timing belt 242 so as to move together with the timing belt 242 between the driven pulleys 31, 32. Since the driven pulleys 31, 32 are arranged side by side along the axial direction of the bobbin Bw, the traverse guide 241 is configured to move along the axial direction of the bobbin Bw as the timing belt 242 moves. When the moving direction of the timing belt 242 changes, the traverse guide 241 is configured to reciprocate along the axial direction of the bobbin Bw. When the traverse guide 241 reciprocates along the axial direction of the bobbin Bw, the yarn Y fed out from the dobby fulcrum guide 23 starts to dobby with the dobby fulcrum guide 23 as a fulcrum.

[0045] Hereinafter, moving the traverse guide 241 in the first direction to dobby the yarn Y is referred to as dobbying in the first direction. Also, moving the traverse guide 241 in the second direction to dobby the yarn Y is referred to as dobbying in the second direction.

[0046] The control device 25 is a device that controls the winding device 1, includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), etc., and can execute various controls by the CPU reading out the program stored in the ROM to the RAM and executing it. The control device 25 has, as functions of the CPU included in the control device 25, an acquisition unit 251, a ratio change unit 252, a position change unit 253, and a drive control unit 254.

[0047] The acquisition unit 251 acquires information regarding the winding diameter of the yarn supply package Ps in the process of formation (hereinafter referred to as winding diameter information). The winding diameter of the yarn supply package Ps is the outermost diameter of the yarn supply package Ps. As a method for acquiring the winding diameter information, for example, the acquisition unit 251 acquires the rotation speed of the bobbin Bw, the diameter of the bobbin Bw, the diameter of the yarn Y, and the elapsed time from the start of winding of the yarn Y onto the bobbin Bw, and calculates the winding diameter of the yarn supply package Ps from these pieces of information.

[0048] The ratio change unit 252 changes the ratio between the speed at which the traverse guide 241 moves in the first direction (hereinafter referred to as the first speed) and the speed at which it moves in the second direction (hereinafter referred to as the second speed) based on the winding diameter information of the yarn supply package Ps acquired by the acquisition unit 251. That is, the ratio change unit 252 controls the shedding of the yarn Y with the shedding fulcrum guide 23 as a fulcrum.

[0049] The position change unit 253 changes the position of the shedding fulcrum guide 23 in the axial direction of the bobbin Bw based on the ratio between the first speed and the second speed of the traverse guide 241, and adjusts the offset distance. The offset distance is the distance from the winding center to the shedding fulcrum guide 23 (the distance along the moving direction of the traverse guide 241). The shedding fulcrum guide 23 is configured to be movable along the axial direction of the bobbin Bw by a motor or the like. The position change unit 253 drives and controls the motor to adjust the offset distance according to the ratio between the first speed and the second speed of the traverse guide 241. With this position change unit 253, even when settings such as the winding speed, the winding width of the yarn supply package Ps, or the moving speed of the traverse guide 241 are different, or when the winding speed, the winding width of the yarn supply package Ps, or the moving speed of the traverse guide changes during winding, the shedding fulcrum guide can be arranged at an optimal position.

[0050] The drive control unit 254 performs drive control of the drive motor that rotates the contact roller 12 to perform rotation control of the bobbin Bw. Further, the drive control unit 254 performs drive control of the drive motor that rotates the thread guiding arm 22 to hook and hold the thread Y on the thread engaging portion 22A of the thread guiding arm at an appropriate timing.

[0051] Furthermore, the drive control unit 254 performs drive control of the traverse guide drive motor 30 to rotate the drive pulley 33 and move the traverse guide 241 in the first direction or the second direction. When the ratio between the first speed and the second speed is changed by the ratio changing unit 252, the traverse guide 241 is moved in the first direction and the second direction based on such ratio. That is, in the present embodiment, the drive control unit 254 controls not only the moving direction of the traverse guide 241 but also the first speed moving in the first direction and the second speed moving in the second direction. Specifically, when the twill swing fulcrum guide 23 is disposed at the winding center, the drive control unit 254 performs drive control of the traverse guide drive motor 30 so as to move at the same speed regardless of the moving direction of the traverse guide 241. Further, when the twill swing fulcrum guide 23 is disposed on the first direction side from the winding center, the drive control unit 254 performs drive control of the traverse guide drive motor 30 so that the second speed at which the traverse guide 241 moves in the second direction becomes slower than the first speed moving in the first direction. By making the first speed and the second speed different, the twill angle when twilling in the first direction becomes larger than the twill angle when twilling in the second direction. The twill angle is an acute angle formed between the circumferential direction of the bobbin Bw and the thread Y wound around the bobbin Bw (Θ shown in FIGS. 4 and 5 described later). When the speed of the traverse guide 241 is changed so that the second speed is slower than the first speed, and the twill swing fulcrum guide 23 is disposed on the first direction side from the winding center, even when settings such as the winding speed or the winding width of the package are different, or when the winding speed or the winding width of the package changes during winding, a yarn feeding package Ps that can be transversely unwound without causing unwinding failure can be formed.

[0052] As described above, the twill swing fulcrum guide 23 is disposed at the center of winding. However, in the intermediate process from the start to the end of winding the thread Y around the bobbin Bw, it is disposed on the first direction side with respect to the center of winding. That is, the twill swing fulcrum guide 23 is disposed on one direction side with respect to the center of winding when reciprocatingly moving the thread such that the second speed at which the traverse guide 241 moves in the second direction is slower than the first speed at which it moves in the first direction. As will be described later, even when the first speed and the second speed are made different, the length of the thread Y wound around the bobbin Bw (hereinafter referred to as the winding length) is the same when swinging in the first direction and when swinging in the second direction. Thereby, the winding tension of the thread Y is the same when swinging in the first direction and when swinging in the second direction, and a good quality yarn supply package Ps is formed.

[0053] (Regarding the winding length of the thread Y) The following shows the results of a simulation conducted to confirm that the winding length of the thread Y is the same when swinging in the first direction and when swinging in the second direction by configuring the winding device 1 as described above.

[0054] FIG. 4 and FIG. 5 are diagrams for explaining the parameters of the simulation conducted to confirm the winding length. FIG. 4 is a diagram showing the case where the twill swing fulcrum guide 23 is disposed at the center of winding. FIG. 5 is a diagram showing the case where the twill swing fulcrum guide 23 is disposed on the first direction side with respect to the center of winding. Further, (A) in FIGS. 4 and 5 is a diagram showing the length of the thread Y from the twill swing fulcrum guide 23 to the traverse guide 241. (B) in FIGS. 4 and 5 is a plan view of the outer peripheral surface of the bobbin Bw (or the yarn supply package Ps), and is a diagram showing the length of the thread Y wound around the outer peripheral surface. In FIGS. 4 and 5, the one-dot chain line P1 is a line passing through the center of winding and orthogonal to the axial direction of the bobbin Bw. The broken line P2 is a line passing on the movement locus of the traverse guide 241. The traverse guide 241 is assumed to move between position A and position C on the broken line P2.

[0055] When the yarn Y is shaken in a twill pattern, the length of the yarn Y from the twill shaking fulcrum guide 23 to the traverse guide 241 (hereinafter referred to as the guide length) changes as the traverse guide 241 moves. In FIGS. 4 and 5(A), the guide length when the traverse guide 241 is at position A is represented by L1. Also, when the traverse guide 241 moves from position A in the first direction and is at position B, the guide length is represented by L2. In this case, the difference Ld1 in the guide length between position A and position B can be expressed as L1 - L2. Note that the angle Θ shown in FIGS. 4 and 5(B) is the twill shaking angle formed by the circumferential direction of the bobbin Bw and the yarn Y wound around the bobbin Bw as described above.

[0056] Also, when the yarn Y is shaken in a twill pattern and when it is not shaken, when the winding time of the yarn Y is the same, the length of the yarn Y wound around the bobbin Bw (or the supply yarn package Ps) (hereinafter referred to as the winding length) is different. In FIGS. 4 and 5(B), when the yarn Y is not shaken and the yarn Y is wound around the bobbin Bw at position A, the winding length is represented by L3. Also, when the traverse guide 241 is moved from position A to position B, the winding length is represented by L4. In this case, the difference Ld2 in the winding length between the case where the yarn Y is shaken in a twill pattern and the case where it is not shaken can be expressed as L4 - L3.

[0057] When the traverse guide 241 is moved from position A to position C and when it is moved from position C to position A, a simulation is performed to detect the above-described difference Ld1 in the guide length and the difference Ld2 in the winding length at predetermined intervals and to confirm the winding length. The results are shown below. FIGS. 6, 7, 8, 9, 10, and 11 are diagrams showing the results of the simulation performed to confirm the winding length. Note that FIG. 6 is a diagram showing the results of the simulation when the twill shaking fulcrum guide 23 is arranged at the center of winding. FIGS. 7 to 11 are diagrams showing the results of the simulation when the twill shaking fulcrum guide 23 is arranged on the first direction side from the center of winding.

[0058] In each of FIGS. 6 to 11, the horizontal axis represents the winding width position, and the vertical axis represents the thread length. Also, in each of FIGS. 6 to 11, (A) shows the result when twill weaving is performed in the first direction, and (B) shows the result when twill weaving is performed in the second direction. Further, in each of FIGS. 6 to 11, the graph line (A) represents the detected difference in winding length Ld2, the graph line (B) represents the detected difference in guide length Ld1, and the graph line (C) represents the total value of the difference in winding length Ld2 and the difference in guide length Ld1. Note that the winding width position indicates the length from the start position of winding to the traversing guide 241 that has moved in the first direction or the second direction. For example, when starting winding from position A and the traversing guide 241 moves to position B along the first direction, the length from position A to position B is the winding width position. Also, when starting winding from position C and the traversing guide 241 moves to position B along the second direction, the length from position C to position B is the winding width position.

[0059] In the simulation of FIG. 6, the winding width is 120 mm, the twill weaving fulcrum distance (the distance from the broken line P2 in FIGS. 4 and 5 to the twill weaving fulcrum guide 23 (the distance in the up-down direction of the paper surface in FIGS. 4 and 5, the same applies hereinafter)) is 500 mm, the rotational speed of the bobbin Bw is 1000 m / min, and the speed of the traversing guide 241 is 105.1 m / min (twill weaving angle 6 deg).

[0060] In the simulation of FIG. 7, the winding width is 120 mm, the offset distance of the twill weaving fulcrum guide 23 (the distance from the dashed-dotted line P1 in FIG. 5 to the twill weaving fulcrum guide 23 (the distance in the left-right direction of the paper surface in FIG. 5, the same applies hereinafter)) is 9.5 mm, the twill weaving fulcrum distance (the distance from the broken line P2 in FIGS. 4 and 5 to the twill weaving fulcrum guide 23) is 500 mm, the rotational speed of the bobbin Bw is 1000 m / min, the first speed of the traversing guide 241 is 140.5 m / min (twill weaving angle 8 deg), and the second speed of the traversing guide 241 is 69.9 m / min (twill weaving angle 4 deg).

[0061] In the simulation of FIG. 8, the winding width is 120 mm, the offset distance of the twill pivot guide 23 is 14.5 mm, the twill pivot distance is 500 mm, the rotation speed of the bobbin Bw is 1000 m / min, the first speed of the traverse guide 241 is 148.4 m / min (twill angle 9 deg), and the second speed of the traverse guide 241 is 52.4 m / min (twill angle 3 deg).

[0062] In the simulation of FIG. 9, the winding width is 120 mm, the offset distance of the twill pivot guide 23 is 11 mm, the twill pivot distance is 500 mm, the rotation speed of the bobbin Bw is 1000 m / min, the first speed of the traverse guide 241 is 105.1 m / min (twill angle 6 deg), and the second speed of the traverse guide 241 is 17.5 m / min (twill angle 1 deg).

[0063] In the simulation of FIG. 10, the winding width is 200 mm, the offset distance of the twill pivot guide 23 is 27 mm, the twill pivot distance is 800 mm, the rotation speed of the bobbin Bw is 1000 m / min, the first speed of the traverse guide 241 is 286.7 m / min (twill angle 16 deg), and the second speed of the traverse guide 241 is 140.5 m / min (twill angle 8 deg).

[0064] In the simulation of FIG. 11, the winding width is 200 mm, the offset distance of the twill pivot guide 23 is 43 mm, the twill pivot distance is 800 mm, the rotation speed of the bobbin Bw is 1000 m / min, the first speed of the traverse guide 241 is 324.9 m / min (twill angle 18 deg), and the second speed of the traverse guide 241 is 105.1 m / min (twill angle 6 deg).

[0065] In the case of FIG. 6, when the twill is performed in the first direction and the second direction, both the difference Ld1 in the guide length and the difference Ld2 in the winding length are the same. Therefore, the winding length of the yarn Y is the same when the twill is performed in the first direction and when the twill is performed in the second direction. Accordingly, since the yarn Y is always wound around the bobbin Bw with a constant winding tension, a good-quality supply package Ps is formed.

[0066] Also, in any of the cases of FIGS. 7 to 11, the difference Ld1 in guide length and the difference Ld2 in winding length are different when the shed is shaken in the first direction and when the shed is shaken in the second direction. On the other hand, when the shed is shaken in the first direction and when the shed is shaken in the second direction, the total value of the difference Ld2 in winding length and the difference Ld1 in guide length is the same. That is, the winding length of the yarn Y is the same when the shed is shaken in the first direction and when the shed is shaken in the second direction. For this reason, since the yarn Y is always wound around the bobbin Bw with a constant winding tension, a high-quality yarn supply package Ps is formed.

[0067] (Regarding the operation of the winding device 1) FIG. 12 is a flowchart regarding the operation of the winding device 1. The winding device 1 executes the processing of the flowchart shown in FIG. 12 by the CPU of the control device 25 reading out the program stored in the ROM and executing it in the RAM. Also, in the present embodiment, by operating the winding device 1, the winding method is implemented. Therefore, the description of the winding method in the present embodiment is replaced with the following description of the operation of the winding device 1. Note that at the start of the operation shown in FIG. 12, the shed swing fulcrum guide 23 is arranged at the center of winding.

[0068] When the bobbin Bw is held by the pair of cradle arms 11, the control device 25 holds the yarn Y with the yarn locking portion 22A, rotates the yarn hanging arm 22, and hooks the yarn Y on the hook (S1). Next, the control device 25 moves the shed swing fulcrum guide 23 to the first direction side from the center of winding (S2). Then, the control device 25 rotates the contact roller 12 to rotate the bobbin Bw (S3). Thereby, the winding of the yarn Y around the bobbin Bw is started.

[0069] The control device 25 performs drive control of the traverse guide drive motor 30 to rotate the drive pulley 33, and controls the movement of the traverse guide 241 (S4). At this time, the control device 25 moves the traverse guide 241 in the first direction at the first speed and in the second direction at the second speed (< the first speed). The control device 25 acquires information on the winding diameter of the feed package Ps (S5). The control device 25 determines whether the winding diameter is equal to or greater than a threshold value from the acquired winding diameter information (S6). If it is not equal to or greater than the threshold value (S6: NO), the control device 25 changes the first speed and the second speed according to the acquired winding diameter information (S7), and adjusts the offset distance of the twill swing fulcrum guide 23 (S8). Then, the control device 25 executes the process of S5 again.

[0070] In the process of S6, when the winding diameter is equal to or greater than the threshold value (S6: YES), the control device 25 moves the twill swing fulcrum guide 23 to the winding center (S9), performs speed control to make the speeds in the first direction and the second direction of the traverse guide 241 the same (S10), and moves the traverse guide 241. Then, the control device 25 waits until the winding is completed (S11), and when the winding is completed, ends the process shown in FIG. 12.

[0071] (Description of the effect) The winding device 1 configured as described above can form a feed package Ps that enables efficient unwinding when unwinding horizontally from the end of the bobbin Bw in the second direction. When unwinding horizontally from a feed package formed by winding the thread Y around the bobbin Bw with a conventional winding device, the thread to be unwound may rub against the thread wound around the bobbin Bw and get caught, resulting in inefficient unwinding. In particular, when unwinding in the second direction, it is not possible to efficiently unwind the thread wound from the end of the bobbin Bw in the first direction to the end in the second direction. For this reason, in the present embodiment, the twill swing angle is increased when swinging in the first direction, and the twill swing angle is decreased when swinging in the second direction. As a result, it is possible to suppress the snagging between the threads when unwinding in the second direction, enabling efficient unwinding.

[0072] In addition, in this embodiment, in principle, the twill swing fulcrum guide 23 is arranged at the center of winding, and the first speed and the second speed of the traverse guide 241 are made the same. However, in the intermediate process from the start to the end of winding the yarn Y around the bobbin Bw, the traverse guide 241 is reciprocally moved so that the second speed is slower than the first speed, and the position of the twill swing fulcrum guide 23 is offset from the winding center in the winding range of the bobbin Bw to the first direction side. Thereby, even when the first speed and the second speed are different, the winding lengths of the yarn Y when swinging in the first direction and when swinging in the second direction can be made the same. Since the rotation speed of the bobbin Bw is constant, the winding tension of the yarn Y is the same when swinging in the first direction and when swinging in the second direction. If the winding tensions are different when swinging in the first direction and when swinging in the second direction, there is a risk of deterioration in the quality of the supply package Ps and yarn breakage during the process. Therefore, by winding the yarn Y around the bobbin Bw with a constant winding tension, a supply package Ps of good quality can be formed.

[0073] In addition, in this embodiment, when the winding diameter of the supply package Ps becomes equal to or greater than the threshold value, as a rule, the twill swing fulcrum guide 23 is moved to the winding center so that the first speed and the second speed of the traverse guide 241 are always the same constant speed. For example, when winding the yarn Y around the supply package Ps with a large curvature in a state where the twill swing fulcrum guide 23 is offset from the winding center, the twill swing angle at the end on the offset side (the first direction side) of the supply package Ps becomes large. In this case, when unwinding horizontally in the unwinding direction (see FIG. 3), rubbing of the yarn Y occurs. Therefore, when winding the yarn Y around the supply package Ps with a large curvature, by arranging the position of the twill swing fulcrum guide 23 at the winding center, the twill swing angle can be reduced. Thereby, rubbing of the yarn Y can be prevented, and a supply package Ps of good quality can be formed.

[0074] However, in the entire process from the start to the end of winding the yarn Y around the bobbin Bw, the traverse guide 241 may be reciprocated so that the second speed is slower than the first speed, and the position of the twill swing fulcrum guide 23 may be offset from the winding center in the winding range of the bobbin Bw to the first direction side. For example, this is particularly effective when the winding diameter of the supply package at the end of winding is smaller than the above-mentioned threshold value.

[0075] Furthermore, in the present embodiment, the twill swing angle can be changed by changing the position of the twill swing fulcrum guide 23. Thereby, not only can the winding lengths of the yarn Y when swinging in the first direction and the second direction be made the same, but also the yarn Y can be wound at an optimal twill swing angle, and a supply package Ps with better lateral unwinding properties can be formed.

[0076] (Modification example) As described above, the embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments, and various modifications are possible as long as they are within the scope described in the claims. For example, in the winding device 1 of the above-described embodiment, a belt traverse is used as the traverse device, and the traverse guide 241 is reciprocated under the control of the control device 25. However, instead of the belt traverse, a blade traverse, a drum traverse, a cam traverse, or an arm traverse may be used to change the ratio between the first speed and the second speed of the traverse guide 241.

[0077] Also, in the above-described embodiment, the control device 25 is configured to have each functional part by executing the installed program. However, it can also be realized by using hardware corresponding to each part. Further, a part of the control device 25 may be realized by a program, and the remaining part may be realized by hardware. Furthermore, the order in which each process executed by the control device 25 is executed is not limited to the order described with reference to FIG. 12 and can be changed as appropriate.

[0078] Furthermore, in the above-described embodiment, the acquisition unit 251 has been described as being configured to calculate the winding diameter information from various types of information. However, the acquisition unit 251 may irradiate the yarn supply package Ps with ultrasonic waves or laser light, and detect the winding diameter of the yarn supply package Ps from the reflected light thereof. Alternatively, the acquisition unit 251 may image the yarn supply package Ps with an imaging device and detect the winding diameter of the yarn supply package Ps by image processing. Or, the acquisition unit 251 may acquire the winding diameter of the yarn supply package Ps detected by another external device from that other device, or may acquire the one manually inputted.

Explanation of Signs

[0079] 1 Take-up device 10 Rotating part 11 Cradle arm 11A Bobbin holder 12 Contact roller 20 Yarn hanging device 21 Yarn holding part 22 Yarn hanging arm 23 Twill swing fulcrum guide 24 Traversing device 25 Control device 30 Traversing guide drive motor 31,32 Driven pulley 241 Traversing guide 242 Timing belt 251 Acquisition unit 252 Ratio change unit 253 Position change unit 254 Drive control unit Bw Bobbin Ps Yarn supply package Y Yarn

Claims

1. In a winding device that winds a yarn with a twill vibration in the axial direction around the cylindrical bobbin to form a package, a rotating part that rotates the bobbin around the axis of the bobbin; a twill vibration fulcrum guide; a traversing device that reciprocates the yarn fed from the twill vibration fulcrum guide and guided to the bobbin between one side and the other side in the traverse direction along the axial direction, and twills the yarn with the twill vibration fulcrum guide as a fulcrum; comprising: the traversing device reciprocates the yarn so that the speed of the yarn on the other side is slower than the speed on the one side in the middle process or the whole process from the start to the end of winding the yarn around the bobbin; when the twill vibration fulcrum guide reciprocates the yarn by the traversing device so that the speed of the yarn on the other side is slower than the speed on the one side, the twill vibration fulcrum guide is arranged on the one side rather than the center in the winding range of the bobbin along the axial direction; Winding device.

2. When the traversing device reciprocates the yarn, the traversing device reciprocates the yarn so as to be parallel to the axial direction of the bobbin. The winding device according to claim 1.

3. The twill vibration fulcrum guide: is arranged at the center in the winding range of the bobbin along the axial direction, and when the traversing device reciprocates the yarn so that the speed of the yarn on the other side is slower than the speed on the one side, the twill vibration fulcrum guide is arranged on the one side rather than the center in the winding range of the bobbin along the axial direction; The winding device according to claim 1 or 2.

4. The traversing device includes a traversing guide that engages with the yarn fed from the twill vibration fulcrum guide and guided to the bobbin and is configured to be reciprocally movable between one side and the other side in the traverse direction, and further includes a ratio changing part that reciprocates the traversing guide and can change the ratio of the moving speeds of the traversing guide between one side and the other side in the traverse direction. The winding device according to claim 1 or claim 2.

5. comprising an acquisition part that acquires information regarding the winding diameter of the package being formed; the ratio changing part can change the ratio of the moving speeds of the traversing guide according to the information acquired by the acquisition part. The winding device according to claim 4.

6. A position changing unit that changes the position of the twill shaking fulcrum guide in the axial direction. The winding device according to any one of claims 1 to 5. **Claim 7** A position changing unit that changes the position of the twill shaking fulcrum guide in the axial direction. The position changing unit changes the position of the twill shaking fulcrum guide in the axial direction based on the ratio of the moving speed of the traverse guide. The winding device according to claim 4 or 5. **Claim 8** The intermediate process from the start to the end of winding the yarn onto the bobbin is the period from the start of winding the yarn onto the bobbin until the winding diameter of the package reaches a predetermined winding diameter. The winding device according to any one of claims 1 to 7.

Images