Winding device and winding method

Abstract

The invention relates to a winding device and a winding method, which can form a package capable of performing transverse unwinding without generating poor unwinding. A winding device (1) winds a yarn (Y) traversing in the axial direction of a bobbin (Bw) on the bobbin (Bw) to form a yarn supply package (Ps). A take-up device (1) is provided with: a rotating unit (10) that rotates a bobbin (Bw); a traverse fulcrum guide (23); and a traverse device (24) that travels a thread (Y) with the traverse fulcrum guide (23) as a fulcrum by reciprocating the traverse guide (241) in the axial direction. The traverse fulcrum guide (23) is disposed closer to the first direction side than the winding center during the midway from the start of winding the yarn (Y) to the bobbin (Bw) until the winding is completed, and the traverse guide (241) reciprocates such that the speed in the second direction side is slower than the speed in the first direction side.

Description

Technical Field

[0001] The present invention relates to a winding device and a winding method for winding a thread that traverses in the axial direction of a bobbin onto the bobbin to form a package. Background Art

[0002] There are known winding devices for winding fibers onto a bobbin to form a package. For example, a winding machine that forms a package with excellent unwinding properties is disclosed in Patent Document 1.

[0003] Patent Document 1: Japanese Patent Application Laid-Open No. 2004-142944

[0004] However, when unwinding a thread from a package, the thread may sometimes be unwound in the axial direction of the bobbin (hereinafter referred to as lateral unwinding). In this case, when using a package wound by the winding machine described in Patent Document 1, unwinding can be performed without problems. However, in the case of laterally unwinding a thread from a bilaterally symmetric package, there may be a problem of poor unwinding due to the collapse of the winding state of the package during the unwinding process. Summary of the Invention

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

[0006] (1) The present invention is a winding device for winding a thread that traverses in the axial direction of a cylindrical bobbin onto the bobbin to form a package, comprising:

[0007] a rotating unit that rotates the bobbin about the axis of the bobbin;

[0008] a traversing fulcrum thread guide; and

[0009] a traversing device that reciprocates the thread fed from the traversing fulcrum thread guide and guided to the bobbin in one side and the other side in a traversing direction along the axial direction, and traverses the thread with the traversing fulcrum thread guide as a fulcrum,

[0010] the traversing device reciprocates the thread in such a manner that the speed of the thread moving to the other side is slower than the speed of the thread moving to the one side during the middle process or the entire process from the start of winding the thread onto the bobbin to the end of winding,

[0011] the traversing fulcrum thread guide is arranged at a position closer to the one side than the center of the winding range of the bobbin along the axial direction when the traversing device reciprocates the thread in such a manner that the speed of the thread moving to the other side is slower than the speed of the thread moving to the one side.

[0012] According to the coiling device described in (1) above, since the traverse guide reciprocates in such a way that the speed towards the other side is slower than the speed towards one side, the traverse angle when traversing towards the other side is smaller than the traverse angle when traversing towards one side. Therefore, when unwinding the silk thread laterally from the other side in the traverse direction of the formed package, the mutual friction between the unwound silk thread and the silk thread wound on the bobbin is reduced, and the occurrence of unwinding defects such as snagging of the silk thread can be suppressed.

[0013] However, when the traverse guide reciprocates in such a way that the speed towards the other side is slower than the speed towards one side, the winding tension of the silk thread when traversing towards one side and when traversing towards the other side will be different. When the winding tension of the silk thread is different when traversing towards one side and when traversing towards the other side, it is possible to deteriorate the quality of the package and cause unwinding defects during the unwinding process of lateral unwinding. Therefore, when the traverse guide reciprocates in such a way that the speed towards the other side is slower than the speed towards one side, by shifting the position of the traverse fulcrum guide from the center of the winding range of the bobbin along the axial direction towards one side in the traverse direction, the winding length of the silk thread when traversing towards one side and the other side in the traverse direction can be made the same. That is, the winding tension of the silk thread when traversing towards one side in the traverse direction becomes the same as the winding tension of the silk thread when traversing towards the other side in the traverse direction. Therefore, a package can be formed that can suppress the occurrence of unwinding defects during the unwinding process of lateral unwinding.

[0014] (2) Preferably, in the coiling device of the present invention,

[0015] When the above traverse device reciprocates the above silk thread, the above silk thread reciprocates in a manner parallel to the axial direction of the above bobbin.

[0016] According to the coiling device described in (2) above, the package wound by reciprocating the silk thread in a manner parallel to the axial direction of the bobbin becomes a rectangular package, but it can solve the specific problem of unwinding defects that may occur in such a rectangular package.

[0017] (3) Preferably, in the coiling device of the present invention,

[0018] The above traverse fulcrum guide is arranged at the center of the winding range of the above bobbin along the above axial direction, and,

[0019] The above traverse fulcrum guide is arranged at a position: when the above silk thread reciprocates in such a way that the speed towards the above other side is slower than the speed towards the above one side by the above traverse device, it is closer to the above one side than the center of the winding range of the above bobbin along the above axial direction.

[0020] The take-up device described in the above (3) can maintain the aesthetic appearance of the package being taken up while suppressing the occurrence of unwinding defects.

[0021] (4) Preferably, in the take-up device of the present invention,

[0022] The traversing device includes a traversing guide that is configured to engage with the thread delivered from the traversing fulcrum guide and guided to the bobbin, and can reciprocate in one side and the other side in the traversing direction.

[0023] The take-up device further includes a ratio change unit that reciprocates the traversing guide and can change the ratio of the moving speeds of the traversing guide on one side and the other side in the traversing direction.

[0024] According to the take-up device described in the above (4), when the maximum outer diameter of the package changes due to the progress of the thread take-up, the ratio of the moving speeds of the traversing guide on one side and the other side in the traversing direction can be changed according to the maximum outer diameter of the package.

[0025] (5) Preferably, in the take-up device of the present invention,

[0026] The take-up device includes an acquisition unit that acquires information related to the winding diameter of the package being formed.

[0027] The ratio change unit can change the ratio of the moving speeds of the traversing guide according to the information acquired by the acquisition unit.

[0028] According to the take-up device described in the above (5), even when the maximum outer diameter of the package changes due to the progress of the thread take-up, the traversing guide can be moved with the best ratio of the speed on one side to the speed on the other side. Thus, a package that can be laterally unwound without unwinding defects can be formed.

[0029] (6) Preferably, in the take-up device of the present invention,

[0030] The take-up device includes a position change unit that changes the position of the traversing fulcrum guide in the axial direction.

[0031] According to the coiling device described in the above (6), even when the settings of the coiling speed, the winding width of the package, or the moving speed of the traversing guide are different, or when the coiling speed, the winding width of the package, or the moving speed of the traversing guide changes during coiling, the traversing fulcrum guide can be arranged at the optimal position. Therefore, it is possible to make the coiling lengths of the silk threads (i.e., the coiling tensions of the silk threads) the same when traversing to one side and the other side in the traversing direction respectively, and a package that can be transversely unwound without unwinding problems can be formed.

[0032] (7) Preferably, in the coiling device of the present invention,

[0033] The above coiling device is provided with a position changing part that changes the position of the traversing fulcrum guide in the above axial direction,

[0034] The above position changing part changes the position of the traversing fulcrum guide in the above axial direction based on the ratio of the moving speed of the traversing guide.

[0035] According to the coiling device described in the above (7), even when the ratio of the speed to one side and the speed to the other side is changed, the position of the traversing fulcrum guide is changed. Therefore, it is possible to make the coiling lengths of the silk threads the same when traversing to one side and the other side in the traversing direction respectively.

[0036] (8) Preferably, in the coiling device of the present invention,

[0037] The intermediate process from the start of coiling the silk thread onto the bobbin to the end of coiling is the period from the start of coiling the silk thread onto the bobbin until the winding diameter of the package becomes a specified winding diameter.

[0038] According to the coiling device described in the above (8), the position of the traversing fulcrum guide is offset when the curvature of the package is small, and the position of the traversing fulcrum guide becomes the center when the curvature of the package becomes large. When coiling the silk thread onto a package with a large curvature in a state where the traversing fulcrum guide is offset, the traversing angle at the bobbin end on one side in the traversing direction becomes large. When unwinding the silk thread from the other side in the traversing direction from this package, friction of the silk thread occurs. Therefore, by changing the position of the traversing fulcrum guide according to the curvature of the package, friction of the silk thread can be suppressed, and a package with good quality can be formed.

[0039] The coiling device of the present invention can be composed only of the components described in the coiling device described in (1) above, and can also arbitrarily combine the components described in (1) above with the components described in any one of (2) to (8) above within the range where integration can be achieved. When combining the components described in (1) above with the components described in any one of (2) to (8) above, all or part of the components described in (1) above can also be combined with all or part of the components described in (2) to (8) above within the range where integration can be achieved.

[0040] Effects of the Invention

[0041] According to the present invention, it is possible to provide a coiling device and a coiling method for forming a package that can suppress the occurrence of unwinding defects during the unwinding process of lateral unwinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a diagram showing a schematic configuration of a false-twist processing machine according to an embodiment.

[0043] Figure 2 It is a diagram showing a schematic configuration of a coiling device according to an embodiment.

[0044] Figure 3 It is a diagram showing the unwinding direction of a supply package.

[0045] Figure 4 It is a diagram for explaining parameters of a simulation performed to confirm the coiling length.

[0046] Figure 5 It is a diagram for explaining parameters of a simulation performed to confirm the coiling length.

[0047] Figure 6 It is a diagram showing the result of a simulation performed to confirm the coiling length.

[0048] Figure 7 It is a diagram showing the result of a simulation performed to confirm the coiling length.

[0049] Figure 8 It is a diagram showing the result of a simulation performed to confirm the coiling length.

[0050] Figure 9 It is a diagram showing the result of a simulation performed to confirm the coiling length.

[0051] Figure 10 It is a diagram showing the result of a simulation performed to confirm the coiling length.

[0052] Figure 11 It is a diagram showing the result of a simulation performed to confirm the coiling length.

[0053] Figure 12 It is a flowchart related to the operation of the winding device.

[0054] Explanation of symbols

[0055] 1: Winding device; 10: Rotating part; 11: Cradle arm; 11A: Bobbin holder; 12: Contact roller; 20: Thread hanging device; 21: Thread holding part; 22: Thread hanging arm; 23: Traversing fulcrum thread guide; 24: Traversing device; 25: Control device; 30: Traversing thread guide drive motor; 31, 32: Driven pulleys; 241: Traversing thread guide; 242: Timing belt; 251: Acquisition part; 252: Ratio change part; 253: Position change part; 254: Drive control part; Bw: Bobbin; Ps: Supply package; Y: Thread. Detailed implementation mode

[0056] Hereinafter, the mode for implementing the present invention will be described with reference to the accompanying drawings. The winding device of this embodiment is a device for forming a package used in a false twisting machine.

[0057] (Configuration of false twisting machine)

[0058] Figure 1 It is a diagram showing the schematic configuration of the false twisting machine 100 of this embodiment. The false twisting machine 100 is configured, for example, to be able to perform false twisting on a thread Y made of a synthetic fiber such as nylon (polyamide-based fiber). The false twisting machine 100 includes a thread supply part 101, a processing part 102, and a winding part 103.

[0059] The thread supply part 101 has a creel 101A that holds a plurality of supply packages Ps. As will be described later, the supply package Ps is formed by winding the thread Y around a cylindrical bobbin. The thread supply part 101 unwinds the thread Y from each of the plurality of supply packages Ps. The thread supply part 101 supplies the unwound thread Y to the processing part 102.

[0060] The processing part 102 performs false twisting on the thread Y supplied from the thread supply part 101. Specifically, the processing part 102 twists the thread Y supplied from the thread supply part 101 by stretching it with a plurality of rollers, and after heating, it is cooled. Then, the processing part 102 performs heat setting while relaxing the thread Y with a plurality of rollers, and supplies it to the winding part 103.

[0061] The winding part 103 winds the processed thread Ys onto a bobbin by a winder 103A to form a wound package Pw. In addition, in this specification, the processed thread is called thread Ys, and the thread before processing is called thread Y for description.

[0062] In the present embodiment, when the yarn supply unit 101 of the false-twist processing machine 100 unwinds the yarn Y from the supply package Ps, the yarn Y is unwound 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 lateral unwinding. When performing lateral unwinding, sometimes the winding state of the yarn of the supply package Ps collapses and twists are generated, making effective unwinding impossible. The take-up device of the present embodiment is a device that forms a supply package Ps that is most suitable for lateral unwinding by the yarn supply unit 101 of the false-twist processing machine 100, and is a device for the process before the false-twist processing machine 100.

[0063] (Configuration of the take-up device)

[0064] Figure 2 FIG. is a diagram showing a schematic configuration of the take-up device 1 of the present embodiment. The take-up device 1 is a device for winding the traversed yarn Y onto the bobbin Bw to form a supply package Ps. The bobbin Bw of the present embodiment is cylindrical, and at least the region of the outer peripheral surface of the bobbin Bw where the yarn Y is wound is a parallel shape (more specifically, a rectangular shape) in a plan view observed from the direction orthogonal to the axial direction.

[0065] In the following description, in the axial direction of the bobbin Bw held by the take-up device 1, Figure 2 the direction from left to right in the plane of the paper is set as the first direction, and the opposite direction is set as the second direction. In addition, the supply package Ps formed by the take-up device 1 is unwound from the end side in the second direction when laterally unwound by the false-twist processing machine 100. The first direction corresponds to the "one side" of the present invention. The second direction corresponds to the "other side" of the present invention.

[0066] The take-up device 1 includes a rotating unit 10 that rotates the bobbin Bw about the axial direction, and a thread-hanging device 20 that winds the yarn Y traversed in the axial direction of the bobbin Bw onto the bobbin Bw.

[0067] The rotating unit 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 through a bobbin holder 11A, and the bobbin Bw can be rotated via the bobbin holder 11A. In addition, although not shown, a hook 11B for hooking the yarn Y onto the bobbin Bw is provided on the bobbin holder 11A that holds the end portion on the first direction side of the bobbin Bw.

[0068] In addition, as Figure 3 shown, a slit S is formed along the outer peripheral surface at the end portion on the first direction side of the bobbin Bw. Figure 3This is a diagram showing the unwinding direction of the supply yarn package Ps. For example, when threading a new bobbin Bw or when the yarn Y is stored on the bobbin Bw in a state where it has been wound for several turns, the operator hooks the yarn Y on the slit S. In addition, the operator joins the rear end of the yarn Y stored in the slit S to the front end of the yarn Y wound on the next bobbin Bw. When unwinding the yarn Y wound on the bobbin Bw, the yarn Y is unwound from the end on the side where the slit S is not formed.

[0069] At the start of winding the yarn Y, the contact roller 12 rotates the bobbin Bw by contacting the outer peripheral surface of the bobbin Bw and rotating in a certain direction. In addition, when winding the yarn Y on the bobbin Bw, the contact roller 12 contacts the outer peripheral surface of the supply yarn package Ps and rotates in a certain direction, thereby rotating the supply yarn package Ps. The contact roller 12 is driven by a drive motor (not shown).

[0070] The threading device 20 includes a yarn holding portion 21, a threading arm 22, a traverse fulcrum yarn guide 23, a traverse device 24, and a control device 25.

[0071] The yarn holding portion 21 attracts and holds the conveyed yarn Y. The threading arm 22 has a yarn locking portion 22A at the front end. The yarn locking portion 22A holds the yarn Y attracted and held by the yarn holding portion 21. The threading arm 22 rotates about a rotation axis 22B at the end on the side opposite to the yarn locking portion 22A. By rotating about the rotation axis 22B, the threading arm 22 brings the yarn locking portion 22A closer to or separates it from the hook provided on the bobbin holder 11A. When the yarn locking portion 22A approaches the hook at a certain timing, the threading arm 22 hooks the yarn Y onto the hook.

[0072] The traverse fulcrum thread guide 23 is a thread guide that sends the thread Y supplied from a device (such as a thread supply roller) arranged on the upstream side (not shown) toward the bobbin Bw. A traverse device 24 described later is interposed between the traverse fulcrum thread guide 23 and the rotating part 10, and the thread Y from the traverse fulcrum thread guide 23 is traversed by the traverse device 24. The traverse fulcrum thread guide 23 is arranged at the center of the winding range of the bobbin Bw along the axial direction (hereinafter referred to as the winding center). In addition, the traverse fulcrum thread guide 23 is configured to be movable, for example, by a motor or the like on a track extending along the axial direction of the bobbin Bw, and the position in the axial direction of the bobbin Bw can be changed. The traverse fulcrum thread guide 23 moves in such a manner that it is arranged at a position on the first direction side with respect to the winding center during the period from the start of winding the thread Y around the bobbin Bw until the winding diameter of the supply bobbin Ps becomes a specified winding diameter. Specifically, during the process from the start of winding the thread Y around the bobbin Bw to the end of winding, it moves in such a manner that it is arranged at a position on the first direction side with respect to the winding center. Then, at the end of winding, the traverse fulcrum thread guide 23 moves in such a manner that it is arranged at a position on the first direction side with respect to the winding center.

[0073] The traverse device 24 is a device that engages with the thread Y sent out from the traverse fulcrum thread guide 23 and guides the thread Y to the traverse thread guide 241 of the bobbin Bw to reciprocate along the axial direction of the bobbin Bw, and traverses the thread Y with the traverse fulcrum thread guide 23 as the fulcrum. The traverse device 24 shown in this embodiment uses a device called a belt traverse.

[0074] The traverse device 24 includes a traverse thread guide 241 and an annular timing belt 242 that moves the traverse thread guide 241.

[0075] The timing belt 242 is stretched between the driven pulleys 31, 32 and the driving 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 driving pulley 33 is arranged at a position on the side opposite to the rotating part 10 with respect to the driven pulleys 31, 32. The driving pulley 33 is rotationally driven by a traverse thread guide drive motor 30. By rotating the driving pulley 33, the timing belt 242 moves.

[0076] The traverse thread 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 in the axial direction of the bobbin Bw, the traverse thread guide 241 moves along the axial direction of the bobbin Bw as the timing belt 242 moves. By changing the moving direction of the timing belt 242, the traverse thread guide 241 reciprocates along the axial direction of the bobbin Bw. By the traverse thread guide 241 reciprocating along the axial direction of the bobbin Bw, the thread Y sent out from the traverse fulcrum thread guide 23 traverses with the traverse fulcrum thread guide 23 as the fulcrum.

[0077] Hereinafter, the case where the traversing wire guide 241 is moved in the first direction to perform the traversing of the wire Y is referred to as traversing in the first direction. In addition, the case where the traversing wire guide 241 is moved in the second direction to perform the traversing of the wire Y is referred to as traversing in the second direction.

[0078] The control device 25 is a device that controls the winding device 1 and includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), etc. The CPU reads the program stored in the ROM into the RAM and executes it, thereby enabling various controls. As the functions of the CPU included in the control device 25, the control device 25 has an acquisition unit 251, a ratio change unit 252, a position change unit 253, and a drive control unit 254.

[0079] The acquisition unit 251 acquires information related to the winding diameter of the wire supply package Ps being formed (hereinafter referred to as winding diameter information). The winding diameter of the wire supply package Ps is the maximum outer diameter of the wire supply package Ps. Regarding the method of 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 wire Y, and the elapsed time since the start of winding the wire Y around the bobbin Bw, and calculates the winding diameter of the wire supply package Ps based on this information.

[0080] The ratio change unit 252 changes the ratio of the speed at which the traversing wire guide 241 moves in the first direction (hereinafter referred to as the first speed) to 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 wire supply package Ps acquired by the acquisition unit 251. That is, the ratio change unit 252 controls the traversing of the wire Y with the traversing fulcrum wire guide 23 as the fulcrum.

[0081] The position changing unit 253 changes the position of the traverse fulcrum guide 23 in the axial direction of the bobbin Bw based on the ratio of the first speed and the second speed of the traverse guide 241, and adjusts the offset distance. The offset distance refers to the distance from the winding center to the traverse fulcrum guide 23 (the distance along the moving direction of the traverse guide 241). The traverse fulcrum guide 23 is configured to be movable along the axial direction of the bobbin Bw by a motor or the like. The position changing unit 253 drives and controls this motor and adjusts the offset distance according to the ratio of the first speed and the second speed of the traverse guide 241. Even when the settings such as the winding speed, the winding width of the supply spool Ps, or the moving speed of the traverse guide 241 are different, or when the winding speed, the winding width of the supply spool Ps, or the moving speed of the traverse guide 241 changes during winding, the position changing unit 253 can arrange the traverse fulcrum guide at the optimal position.

[0082] 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. In addition, the drive control unit 254 performs drive control of the drive motor that rotates the thread hanging arm 22, and hooks the thread Y on the hook by the thread locking portion 22A of the thread hanging arm at an appropriate timing.

[0083] Furthermore, the drive control unit 254 performs drive control of the traverse guide drive motor 30 to rotate the drive pulley 33, and moves the traverse guide 241 in the first direction or the second direction. When the ratio of 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 this ratio. That is, in the present embodiment, the drive control unit 254 not only controls the moving direction of the traverse guide 241, but also controls the first speed moving in the first direction and the second speed moving in the second direction. Specifically, the drive control unit 254 performs drive control of the traverse guide drive motor 30 so that when the traverse fulcrum guide 23 is arranged at the winding center, it moves at the same speed regardless of the moving direction of the traverse guide 241. In addition, the drive control unit 254 performs drive control of the traverse guide drive motor 30 so that when the traverse fulcrum guide 23 is arranged at a position on the first direction side with respect to the winding center, 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. By making the first speed and the second speed different, the traverse angle when traversing in the first direction is larger than the traverse angle when traversing in the second direction. The traverse angle refers to the acute angle formed by the circumferential direction of the bobbin Bw and the thread Y wound around the bobbin Bw (described later Figure 4 、 Figure 5(Θ) shown in. When the speed of the traverse guide 241 is changed so that the second speed is slower than the first speed, by arranging the traverse fulcrum guide 23 at a position on the first direction side with respect to the winding center, even when the 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, it is possible to form a supply package Ps that can be laterally unwound without causing unwinding problems.

[0084] In addition, as described above, the traverse fulcrum guide 23 is arranged at the winding center, but during the process from the start of winding the yarn Y onto the bobbin Bw to the end of winding, the traverse fulcrum guide 23 is arranged at a position on the first direction side with respect to the winding center. That is, when the traverse guide 241 reciprocates the yarn so that the second speed of moving in the second direction is slower than the first speed of moving in the first direction, the traverse fulcrum guide 23 is arranged at a position on one side with respect to the winding center. As will be described later, even when the first speed and the second speed are different, the length of the yarn Y wound onto the bobbin Bw during traverse in the first direction and during traverse in the second direction (hereinafter referred to as the winding length) is the same. Thus, during traverse in the first direction and during traverse in the second direction, the winding tension of the yarn Y is the same, and a supply package Ps with good quality is formed.

[0085] (Regarding the winding length of the yarn Y)

[0086] Hereinafter, the results of a simulation performed to confirm the following are shown: By configuring the winding device 1 as described above, the winding length of the yarn Y becomes the same during traverse in the first direction and during traverse in the second direction.

[0087] Figure 4 and Figure 5 are diagrams for explaining the parameters of the simulation performed to confirm the winding length. Figure 4 is a diagram showing the case where the traverse fulcrum guide 23 is arranged at the winding center. Figure 5 is a diagram showing the case where the traverse fulcrum guide 23 is arranged at a position on the first direction side with respect to the winding center. In addition, Figure 4 (A) of Figure 5 is a diagram showing the length of the yarn Y from the traverse fulcrum guide 23 to the traverse guide 241. Figure 4 (B) of Figure 5 is a plan view of the outer peripheral surface of the bobbin Bw (or the supply package Ps) and is a diagram showing the length of the yarn Y wound around the outer peripheral surface. In this Figure 4 and Figure 5Among them, the dash-dotted line P1 is a line passing through the center of winding and orthogonal to the axial direction of the bobbin Bw. The dashed line P2 is a line passing through the movement locus of the traverse guide 241. The traverse guide 241 moves between position A and position C on the dashed line P2.

[0088] When the wire Y is traversed, the length of the wire Y from the traverse fulcrum guide 23 to the traverse guide 241 (hereinafter referred to as the guide wire length) changes as the traverse guide 241 moves. In Figure 4 (A) of Figure 5 and Figure 4 (A) of Figure 5 , the guide wire length when the traverse guide 241 is at position A is represented by L1. In addition, the guide wire length when the traverse guide 241 moves from position A in the first direction and is at position B is represented by L2. In this case, the difference in the guide wire length Ld1 between position A and position B can be represented by L1 - L2. In addition,

[0089] In addition, when the wire Y is traversed and when the wire Y is not traversed, when the winding time of the wire Y is the same, the length of the wire Y wound around the bobbin Bw (hereinafter referred to as the winding length) is different. In Figure 4 (B) of Figure 5 and

[0090] (B) of Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 are diagrams showing the results of the simulation for confirming the winding length. In addition, Figure 6 is a diagram showing the results of the simulation when the traverse fulcrum guide 23 is arranged at the center of winding. Figures 7 to 11 is a diagram showing the results of the simulation when the traverse fulcrum guide 23 is arranged at a position on the first direction side closer to the center of winding than the center of winding.

[0091] In Figures 6 to 11 each case, the horizontal axis is set as the winding width position, and the vertical axis is set as the length of the wire. In addition, in Figures 6 to 11 each case, (A) represents the result in the case of traversing in the first direction, and (B) represents the result in the case of traversing in the second direction. Further, in Figures 6 to 11 each case, the curve (A) represents the detected difference in winding length Ld2, the curve (B) represents the detected difference in guide wire length Ld1, and the curve (C) represents the sum value of the difference in winding length Ld2 and the difference in guide wire length Ld1. In addition, the winding width position represents the length from the winding start position to the traversing guide wire device 241 that has moved in the first direction or the second direction. For example, when winding starts from position A and the traversing guide wire device 241 moves along the first direction to position B, the length from position A to position B is the winding width position. In addition, when winding starts from position C and the traversing guide wire device 241 moves along the second direction to position B, the length from position C to position B is the winding width position.

[0092] In Figure 6 the simulation, the winding width is set to 120 mm, the traversing fulcrum distance ( Figure 4 , Figure 5 the distance from the dashed line P2 to the traversing fulcrum guide wire device 23 ( Figure 4 , Figure 5 the distance in the vertical direction of the paper surface, the same below.)) is set to 500 mm, the rotational speed of the bobbin Bw is set to 1000 m / min, and the speed of the traversing guide wire device 241 is set to 105.1 m / min (traversing angle 6 deg).

[0093] In Figure 7 the simulation, the winding width is set to 120 mm, the offset distance of the traversing fulcrum guide wire device 23 ( Figure 5 the distance from the dotted line P1 to the traversing fulcrum guide wire device 23 ( Figure 5 the distance in the horizontal direction of the paper surface, the same below.)) is set to 9.5 mm, the traversing fulcrum distance ( Figure 4 , Figure 5 the distance from the dashed line P2 to the traversing fulcrum guide wire device 23) is set to 500 mm, the rotational speed of the bobbin Bw is set to 1000 m / min, the first speed of the traversing guide wire device 241 is set to 140.5 m / min (traversing angle 8 deg), and the second speed of the traversing guide wire device 241 is set to 69.9 m / min (traversing angle 4 deg).

[0094] In Figure 8In the simulation, the winding width is set to 120 mm, the offset distance of the traversing fulcrum wire guide 23 is set to 14.5 mm, the traversing fulcrum distance is set to 500 mm, the rotational speed of the bobbin Bw is set to 1000 m / min, the first speed of the traversing wire guide 241 is set to 148.4 m / min (traversing angle 9 deg), and the second speed of the traversing wire guide 241 is set to 52.4 m / min (traversing angle 3 deg).

[0095] In Figure 9 the simulation, the winding width is set to 120 mm, the offset distance of the traversing fulcrum wire guide 23 is set to 11 mm, the traversing fulcrum distance is set to 500 mm, the rotational speed of the bobbin Bw is set to 1000 m / min, the first speed of the traversing wire guide 241 is set to 105.1 m / min (traversing angle 6 deg), and the second speed of the traversing wire guide 241 is set to 17.5 m / min (traversing angle 1 deg).

[0096] In Figure 10 the simulation, the winding width is set to 200 mm, the offset distance of the traversing fulcrum wire guide 23 is set to 27 mm, the traversing fulcrum distance is set to 800 mm, the rotational speed of the bobbin Bw is set to 1000 m / min, the first speed of the traversing wire guide 241 is set to 286.7 m / min (traversing angle 16 deg), and the second speed of the traversing wire guide 241 is set to 140.5 m / min (traversing angle 8 deg).

[0097] In Figure 11 the simulation, the winding width is set to 200 mm, the offset distance of the traversing fulcrum wire guide 23 is set to 43 mm, the traversing fulcrum distance is set to 800 mm, the rotational speed of the bobbin Bw is set to 1000 m / min, the first speed of the traversing wire guide 241 is set to 324.9 m / min (traversing angle 18 deg), and the second speed of the traversing wire guide 241 is set to 105.1 m / min (traversing angle 6 deg).

[0098] In Figure 6 this case, when traversing in the first direction and the second direction, the difference in wire length Ld1 and the difference in winding length Ld2 are the same. Therefore, the winding length of the wire Y is the same when traversing in the first direction and when traversing in the second direction. Thus, the wire Y is wound onto the bobbin Bw with a constant winding tension all the time, and thus a good-quality supply spool Ps is formed.

[0099] In addition, regardless of Figures 7 to 11In which case, when traversing in the first direction and when traversing in the second direction, the difference Ld1 in the length of the guide wire and the difference Ld2 in the winding length are each different. On the other hand, when traversing in the first direction and when traversing in the second direction, the sum of the difference Ld2 in the winding length and the difference Ld1 in the guide wire length is the same. That is, the winding lengths of the wire Y in the case of traversing in the first direction and in the case of traversing in the second direction are the same. Therefore, the wire Y is always wound around the bobbin Bw with a constant winding tension, and thus a supply bobbin package Ps with good quality is formed.

[0100] (Regarding the operation of the winding device 1)

[0101] Figure 12 is a flowchart related to the operation of the winding device 1. The winding device 1 is executed by the CPU of the control device 25 reading the program stored in the ROM into the RAM and executing Figure 12 the processing of the flowchart shown. In addition, in the present embodiment, the winding method is implemented by operating the winding device 1. Therefore, the description of the winding method in the present embodiment can be replaced with the following description of the operation of the winding device 1. In addition, at Figure 12 the start of the operation shown, the traversing fulcrum wire guide 23 is arranged at the winding center.

[0102] When the bobbin Bw is held by a pair of cradle arms 11, the control device 25 causes the wire clamping portion 22A to hold the wire Y, rotates the wire hanging arm 22, and hooks the wire Y on the hook (S1). Then, the control device 25 moves the traversing fulcrum wire guide 23 to a position closer to the first direction side than the winding center (S2). Then, the control device 25 rotates the contact roller 12 to rotate the bobbin Bw (S3). Thereby, the winding of the wire Y around the bobbin Bw starts.

[0103] The control device 25 performs drive control of the traversing wire guide drive motor 30 to rotate the drive pulley 33, and controls the movement of the traversing wire guide 241 (S4). At this time, the control device 25 moves the traversing wire guide 241 in the first direction at a first speed and in the second direction (< the first speed). The control device 25 acquires information on the winding diameter of the supply bobbin package Ps (S5). The control device 25 determines whether the winding diameter is equal to or greater than a threshold value based on the acquired winding diameter information (S6). In the case where 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 (S7) based on the acquired winding diameter information, and adjusts the offset distance of the traversing fulcrum wire guide 23 (S8). Then, the control device 25 executes the process of S5 again.

[0104] In the process of step S6, when the winding diameter is equal to or greater than the threshold value (S6: "Yes"), the control device 25 moves the traverse fulcrum wire guide 23 toward the center of winding (S9), and performs speed control to make the speeds of the traverse wire guide 241 in the first direction and the second direction the same (S10), causing the traverse wire guide 241 to move. Then, the control device 25 stands by until the winding is completed (S11), and when the winding is completed, the Figure 12 processing shown is ended.

[0105] (Description of the effect)

[0106] The take-up device 1 configured as described above can form a wire supply package Ps that enables effective unwinding when unwinding laterally from the end of the bobbin Bw in the second direction. When unwinding laterally from a wire supply package formed by winding the wire Y around the bobbin Bw using a conventional take-up device, sometimes the unwound wire rubs against and gets caught on the wire wound around the bobbin Bw, making effective unwinding impossible. In particular, when unwinding in the second direction, it is not possible to effectively unwind the wire wound from the end in the first direction of the bobbin Bw toward the end in the second direction. Therefore, in the present embodiment, the traverse angle is increased when traversing in the first direction and decreased when traversing in the second direction. As a result, it is possible to suppress the wires from catching on each other when unwinding in the second direction and enable effective unwinding.

[0107] In addition, in the present embodiment, in principle, the traverse fulcrum wire guide 23 is arranged at the center of winding, and the first speed and the second speed of the traverse wire guide 241 are made the same. However, during the process from the start of winding the wire Y around the bobbin Bw to the end of winding, the traverse wire guide 241 reciprocates in such a way that the second speed is slower than the first speed, and the position of the traverse fulcrum wire guide 23 is offset from the center of winding in the winding range of the bobbin Bw toward the first direction side. As a result, even when the first speed and the second speed are different, it is possible to make the winding lengths of the wire Y the same when traversing in the first direction and when traversing in the second direction. Since the rotation speed of the bobbin Bw is constant, the winding tension of the wire Y becomes the same when traversing in the first direction and when traversing in the second direction. If it is assumed that the winding tensions are different when traversing in the first direction and when traversing in the second direction, it is possible to cause a deterioration in the quality of the wire supply package Ps or wire breakage during the process. Therefore, by winding the wire Y around the bobbin Bw with a constant winding tension, it is possible to form a wire supply package Ps with good quality.

[0108] In addition, in the present embodiment, when the winding diameter of the supply bobbin Ps becomes equal to or greater than a threshold value, in principle, the traverse fulcrum guide 23 is moved toward the winding center, and the first speed and the second speed of the traverse guide 241 are always made the same constant speed. For example, in a state where the traverse fulcrum guide 23 is offset from the winding center, when the wire Y is wound around the supply bobbin Ps with an increasing curvature, the traverse angle at the end on the offset side (the first direction side) of the supply bobbin Ps becomes larger. In this case, when lateral unwinding is performed in the unwinding direction (refer to Figure 3 ), friction of the wire Y occurs. Therefore, when the wire Y is wound around the supply bobbin Ps with an increasing curvature, by arranging the position of the traverse fulcrum guide 23 at the winding center, the traverse angle can be reduced. Thereby, friction of the wire Y can be prevented, and a supply bobbin Ps with good quality can be formed.

[0109] However, it is also possible that, during the entire process from the start of winding the wire Y around the bobbin Bw to the end of winding, the traverse guide 241 reciprocates in such a manner that the second speed is slower than the first speed, and the position of the traverse fulcrum guide 23 is offset from the winding center in the winding range of the bobbin Bw toward the first direction side. This is particularly effective, for example, when the winding diameter of the supply bobbin at the end of winding is smaller than the above-mentioned threshold value.

[0110] Furthermore, in the present embodiment, the traverse angle can be changed by changing the position of the traverse fulcrum guide 23. Thereby, not only can the winding lengths of the wire Y during traversing in the first direction and the second direction be made the same, but also the wire Y can be wound at an optimal traverse angle, and a supply bobbin Ps with more excellent lateral unwinding performance can be formed.

[0111] (Modification example)

[0112] The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and various changes can be made as long as they are described in the claims. For example, in the winding device 1 of the above embodiment, it is configured to use a belt traverse as the traverse device, and the traverse guide 241 reciprocates under the control of the control device 25. However, it can also be configured to change the ratio of the first speed and the second speed of the traverse guide 241 by using a vane traverse, a roller traverse, a cam traverse, or an arm traverse instead of the belt traverse.

[0113] In addition, in the above embodiment, the control device 25 is configured to have the functions of each part by executing the installed program, but it can also be realized by using hardware corresponding to each part. In addition, a part of the control device 25 can be realized by a program and the remaining part can be realized by hardware. Furthermore, each process executed by the control device 25 can be appropriately changed without being executed in the order described in Figure 12 and explained.

[0114] Furthermore, in the above-described embodiment, the configuration in which the acquisition unit 251 calculates the winding diameter information based on various information has been described. However, the acquisition unit 251 may also irradiate the wire supply spool Ps with ultrasonic waves or laser light, and detect the winding diameter of the wire supply spool Ps based on the reflected light thereof. In addition, the acquisition unit 251 may also image the wire supply spool Ps by means of an imaging device, and detect the winding diameter of the wire supply spool Ps through image processing. Alternatively, the acquisition unit 251 may acquire the winding diameter of the wire supply spool Ps detected by another external device from the other device, or may acquire a manually input winding diameter.

Claims

1. A winding device winds a thread that reciprocates in the axial direction of a cylindrical bobbin onto the bobbin to form a package, and includes: a rotating part that rotates the bobbin about the axis of the bobbin; a traversing fulcrum thread guide; and a traversing device that reciprocates the thread sent out from the traversing fulcrum thread guide and guided to the bobbin in one side and the other side in the traversing direction along the axial direction, and makes the thread traverse with the traversing fulcrum thread guide as a fulcrum, the traversing device makes the thread reciprocate in such a manner that the speed of the thread moving to the other side is slower than the speed of the thread moving to the one side during the middle process or the entire process from the start of winding the thread onto the bobbin to the end of winding, the traversing fulcrum thread guide is arranged at a position: when the traversing device makes the thread reciprocate in such a manner that the speed of the thread moving to the other side is slower than the speed of the thread moving to the one side, it is closer to the one side than the center of the winding range of the bobbin along the axial direction.

2. The winding device according to claim 1, wherein when the traversing device makes the thread perform the reciprocating movement, the traversing device makes the thread reciprocate in a direction parallel to the axial direction of the bobbin.

3. The winding device according to claim 1 or 2, wherein the traversing fulcrum thread guide is arranged at the center of the winding range of the bobbin along the axial direction, and the traversing fulcrum thread guide is arranged at a position: when the traversing device makes the thread reciprocate in such a manner that the speed of the thread moving to the other side is slower than the speed of the thread moving to the one side, it is closer to the one side than the center of the winding range of the bobbin along the axial direction.

4. The winding device according to claim 1 or 2, wherein the traversing device includes a traversing thread guide that is configured to engage with the thread sent out from the traversing fulcrum thread guide and guided to the bobbin, and can reciprocate in one side and the other side in the traversing direction, the winding device further includes a ratio changing part that reciprocates the traversing thread guide and can change the ratio of the moving speeds of the traversing thread guide on one side and the other side in the traversing direction.

5. The winding device according to claim 4, wherein the winding device includes an obtaining part that obtains information related to the winding diameter of the package being formed midway, the ratio changing part can change the ratio of the moving speeds of the traversing thread guide according to the information obtained by the obtaining part.

6. The winding device according to any one of claims 1 to 5, wherein the winding device includes a position changing part that changes the position of the traversing fulcrum thread guide in the axial direction.

7. The winding device according to claim 4 or 5, wherein the winding device includes a position changing part that changes the position of the traversing fulcrum thread guide in the axial direction, the position changing part changes the position of the traversing fulcrum thread guide in the axial direction based on the ratio of the moving speeds of the traversing thread guide.

8. The winding device according to any one of claims 1 to 7, wherein The intermediate process from the start of winding the thread onto the above-mentioned bobbin until the end of winding is the period from the start of winding the thread onto the above-mentioned bobbin until the winding diameter of the above-mentioned package becomes the specified winding diameter.

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