Threading device, false twisting machine, and threading method

Abstract

To prevent a straight winding from being formed at a bobbin, when thread is wound onto the bobbin.SOLUTION: A thread-winding device 60 includes: a thread-winding arm 62 having a thread locking part 62a; and a bunch guide 65. The thread locking part 62a is constituted in such a manner that when the thread-winding arm 62 is at a thread-winding position, a thread Y comes off according to the thread winding onto a hook 41a. The bunch guide 65 holds the thread Y which has come off from the thread locking part 62a at a bunch winding position x which is outside the traverse range of a bobbin Bw. A control part 64 controls so that a traverse guide 72 moves between a predetermined position and the inside of the traverse range r. The bunch guide 65 is constituted in such a manner that the held thread Y is captured by the traverse guide 72 moving from the predetermined position to the inside of the traverse range r, and comes off from the bunch guide 65.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a yarn threading device that threads a yarn onto a winding device, a false twisting machine having the yarn threading device, and a yarn threading method. [Background technology]

[0002] A winding device that winds a yarn onto a bobbin to form a package is configured to wind the yarn onto the bobbin, which is sandwiched between a pair of bobbin holders rotatably attached to a cradle, while a reciprocating traverse guide causes the yarn to traverse within a predetermined range. In such a winding device, when a full package is discharged, an empty bobbin with no yarn wound thereon is set on the cradle. Then, a yarn threading device threads the yarn onto the bobbin set on the cradle.

[0003] Patent Document 1 discloses a threading device including a thread hooking member (thread hooking arm in Patent Document 1) that has a thread hooking portion for hooking the thread and is rotatable between a threading position where the thread is hooked onto a hook (thread hooking portion in Patent Document 1) formed on one of a pair of bobbin holders and a standby position. In this threading device, as the thread hooking member moves from the standby position to the threading position, the thread, which is sucked and held by a thread holding portion (suction pipe in Patent Document 1), is hooked onto the thread hooking portion. When the thread hooking member reaches the threading position, the thread hooked onto the thread hooking portion is hooked onto the hook of the rotating bobbin holder. Then, the thread is cut by a cutter attached to the cradle, thereby releasing the thread from the thread holding portion and completing the threading onto the hook. The thread hooked onto the hook is bunch-wound in an area outside the bobbin traverse range while still being hooked onto the thread hooking portion. The bunch winding is formed so that the initial winding end of the thread can be removed when joining the ends of the threads of multiple packages together in a subsequent process. When the bunch winding is completed, the yarn hooking member moves to the standby position. As the yarn hooking member returns from the yarn hooking position to the standby position, the yarn comes off the yarn catcher within the traverse range. The yarn that has come off the yarn catcher is captured by the traverse guide and traverses along the axial direction of the bobbin. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 10-194596 Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-described yarn threading device, the yarn threading member is configured to rotate so that the yarn hooking portion passes near the center of the traverse range, and the yarn is released from the yarn hooking portion near that center. As a result, during the time that passes between when the yarn is released from the yarn hooking portion and when the reciprocating traverse guide reaches near the center of the traverse range and captures the yarn, a straight winding pattern is formed, in which the yarn is wound twice at the same location near the center of the bobbin. When a straight winding pattern is formed on the bobbin, the yarn becomes difficult to unwind from the package.

[0006] SUMMARY OF THE INVENTION An object of the present invention is to prevent the formation of a straight winding on a bobbin when threading the bobbin. [Means for solving the problem]

[0007] The threading device of the present invention is a threading device for threading a thread onto a bobbin mounted between a pair of bobbin holders, and includes a thread holding section for holding the thread, a thread hooking section formed on one of the pair of bobbin holders, and a thread locking section at which the thread held by the thread holding section is locked, the threading device being movable between a threading position where the thread is threaded onto the thread hooking section and a standby position, a traverse guide that moves back and forth along the axial direction of the bobbin holders to traverse the yarn to be wound onto the bobbin within a traverse range, and a control section that controls the drive of the traverse guide, and the thread locking section is held by the thread holding section while the threading member is moving from the standby position to the threading position. and when the yarn hooking member is at the yarn hooking position, the yarn is released as the yarn is hooked onto the yarn hooking portion, and the bobbin further includes a bunch guide that holds the yarn hooked onto the yarn hooking portion so as to maintain the yarn at a bunch winding position that is outside the traverse range of the bobbin, and the control unit controls the traverse guide to move between a predetermined position that is a position on the opposite side of the traverse range with respect to the yarn held by the bunch guide and within the traverse range, and the bunch guide is configured so that the held yarn is captured by the traverse guide as it moves from the predetermined position into the traverse range and released from the bunch guide.

[0008] According to the present invention, as the yarn is hooked onto the yarn hooking portion, it is released from the yarn holding portion and is held by the bunch guide so as to maintain the yarn at the bunch winding position on the bobbin. The yarn held by the bunch guide is then captured by the traverse guide, which moves from a predetermined position into the traverse range, and is released from the bunch guide. Therefore, during the time that passes between when the yarn is released from the yarn holding portion and when it is captured by the traverse guide, the yarn is not present in the traverse range, and straight winding in the traverse range can be prevented.

[0009] In the yarn threading device of the present invention, it is preferable that the control unit keeps the traverse guide waiting at the predetermined position before the yarn is threaded onto the yarn hooking portion, and moves the traverse guide, which is at the predetermined position, into the traverse range when bunch winding is completed.

[0010] During the period from the completion of bunch winding until traverse is performed, the yarn winding tension is lower than when the yarn is being traversed by the traverse guide. The longer the yarn winding tension remains low, the greater the amount of slack in the yarn, increasing the risk of the yarn being wound around a feed roller or machine frame arranged upstream in the yarn running direction of the winding device, causing yarn breakage. According to the present invention, after bunch winding is completed, the yarn is quickly captured by the traverse guide, which has been placed in a predetermined position, and traverse is initiated. This shortens the time during which the yarn winding tension is low without traverse. This reduces the amount of slack in the yarn when the yarn is wound onto the bobbin.

[0011] In the yarn threading device of the present invention, the traverse guide is preferably driven by a motor.

[0012] According to the present invention, the time for which the bunch winding is performed can be easily controlled by driving the traverse guide with a motor, thereby enabling more accurate adjustment of the bunch winding amount.

[0013] In the yarn threading device of the present invention, it is preferable that the bunch guide has a holding portion that holds the yarn while restricting movement of the yarn within the traverse range, and a guiding portion that guides the yarn that has come off the yarn catch portion to the holding portion.

[0014] According to the present invention, the guide portion can guide the thread released from the thread holding portion to the holding portion, thereby ensuring that the thread released from the thread holding portion is guided more reliably by the thread hooking portion.

[0015] In the yarn threading device of the present invention, it is preferable that at least a part of the guide portion is located closer to the traverse range than the yarn locking portion of the yarn threading member that is in the yarn threading position.

[0016] According to the present invention, even if the yarn that has come off the yarn holding portion moves toward the traverse range side of the yarn holding portion, the guiding portion can more reliably guide the yarn to the holding portion.

[0017] In the yarn threading device of the present invention, it is preferable that the holding portion and the guiding portion are integrally formed.

[0018] According to the present invention, there is no gap between the holding portion and the guiding portion, so that the yarn is smoothly guided from the guiding portion to the holding portion without dropping off along the way.

[0019] In the yarn threading device of the present invention, it is preferable that at least a part of the guide portion is arranged on a yarn path upstream of the yarn hooking portion in the yarn running direction of the yarn, the yarn being hooked on the yarn hooking portion, and the bunch guide is arranged closer to the bobbin holder than the traverse guide in the yarn running direction of the yarn.

[0020] Generally, a yarn fed to a bobbin supported by a bobbin holder is guided by a traverse fulcrum guide located upstream of the bobbin holder in the yarn running direction and near the center of the bobbin in the axial direction. Meanwhile, the yarn hooking portion of the yarn hooking member at the yarn hooking position is located near the yarn hooking portion. Therefore, when the yarn is hooked onto the yarn hooking portion, an oblique yarn path is formed from the traverse fulcrum guide toward the yarn hooking portion. To ensure that the bunch guide securely holds the yarn that has been released from the yarn hooking portion, at least the guide portion of the bunch guide must be positioned on the yarn path leading from the traverse fulcrum guide to the yarn hooking portion. Here, if the bunch guide is positioned away from the bobbin holder in the yarn running direction, the bunch guide must be positioned closer to the center of the traverse fulcrum guide in the axial direction, which means that the bunch guide is positioned away from the bunch winding position toward the traverse range in the axial direction. In this case, the yarn that has approached the traverse range due to being held by the bunch guide must be returned to the bunch winding position, which may widen the bunch winding width. If the bunch winding width becomes too wide, the yarn being wound in the bunch may enter the traverse range. Thus, if the bunch guide is positioned axially away from the bunch winding position toward the traverse range, it becomes difficult to maintain the yarn held by the bunch guide at the bunch winding position. According to the present invention, at least a portion of the guide portion is positioned on the yarn path of the yarn hooked on the yarn hooking portion, upstream of the yarn hooking portion in the yarn traveling direction. Furthermore, the bunch guide is located closer to the bobbin holder than the traverse guide in the yarn traveling direction. Therefore, the bunch guide can be positioned axially closer to the bunch winding position, and the yarn can be reliably held at the bunch winding position.

[0021] In the yarn threading device of the present invention, it is preferable that the control unit causes the traverse guide to wait at the predetermined position before the yarn threading member starts to move from the standby position to the yarn threading position.

[0022] According to the present invention, the traverse guide is placed on standby at a predetermined position before the yarn hooking member starts moving from its standby position to the yarn hooking position. This prevents the yarn that has come off the yarn hooking member and is held by the bunch guide when it reaches the yarn hooking position from coming into contact with the traverse guide as it moves from within the traverse range to the predetermined position. This prevents the position where the bunch is wound around the bobbin from shifting from the actual bunch winding position.

[0023] In the threading device of the present invention, it is preferable that the thread retaining portion has a downwardly inclined support portion that supports the thread from below, and that the thread is released by moving downward along the support portion as the thread is threaded onto the thread hooking portion.

[0024] According to the present invention, when a downward force acts on the thread during threading, the thread moves along the downwardly inclined support portion and is released from the thread-holding portion. Therefore, the thread can be reliably released from the thread-holding portion during threading without requiring a complex configuration.

[0025] The false twisting machine of the present invention comprises a yarn supplying section for supplying yarn, a processing section for false twisting the yarn supplied from the yarn supplying section, and a winding section for winding the yarn false twisted in the processing section, wherein the winding section has a winding device that winds the yarn onto a bobbin attached to a bobbin holder to form a package, and any one of the yarn threading devices described above.

[0026] According to the present invention, as the yarn is hooked onto the yarn hooking portion, it is released from the yarn holding portion and is held by the bunch guide so as to maintain the yarn at the bunch winding position on the bobbin. The yarn held by the bunch guide is then captured by the traverse guide, which moves from a predetermined position into the traverse range, and is released from the bunch guide. Therefore, during the time that passes between when the yarn is released from the yarn holding portion and when it is captured by the traverse guide, the yarn is not present in the traverse range, and straight winding in the traverse range can be prevented.

[0027] The threading method of the present invention is a threading method for threading a yarn onto a bobbin attached to a bobbin holder by a threading device comprising: a thread holding portion for holding a yarn; a thread hooking portion formed on one of the pair of bobbin holders; a thread hooking member having a thread hooking portion at which the yarn held by the thread holding portion is hooked, the thread hooking member being movable between a threading position where the yarn is hooked onto the thread hooking portion and a standby position; a traverse guide that moves back and forth along the axial direction of the bobbin holder to traverse the yarn to be wound onto the bobbin within a traverse range; and a bunch guide that holds the yarn hooked on the thread hooking portion so as to maintain it at a bunch winding position outside the traverse range of the bobbin, a yarn holding step of holding the yarn that has come off the yarn holding part as the yarn has been hooked onto the yarn hooking part at the yarn hooking position so that the yarn is maintained at the bunch winding position by the bunch guide; a guide standby step of holding the traverse guide at a predetermined position that is a position on the opposite side of the traverse range from the yarn held by the bunch guide; and a traverse step of moving the traverse guide from the predetermined position into the traverse range, wherein in the traverse step, the yarn held by the bunch guide is captured by the traverse guide that moves from the predetermined position into the traverse range and is released from the bunch guide.

[0028] According to the invention, the yarn comprises: Thread hook As the yarn is threaded onto the bobbin, it disengages from the yarn holding portion and is held by the bunch guide so as to maintain the bunch winding position on the bobbin. The yarn held by the bunch guide is then captured by the traverse guide, which moves from a predetermined position into the traverse range, and is removed from the bunch guide. Therefore, during the time that passes between when the yarn disengages from the yarn holding portion and when it is captured by the traverse guide, the yarn does not exist in the traverse range, and straight winding can be prevented from being formed in the traverse range. [Brief explanation of the drawings]

[0029] [Figure 1] 1 is a schematic side view of a false twisting machine according to an embodiment of the present invention. [Figure 2] FIG. 2 is a schematic diagram showing the configuration of a winding section. [Figure 3] FIG. 2 is a partial perspective view showing the vicinity of an end of a bobbin attached to a bobbin holder and the threading arm at a threading position. [Figure 4] 10 is a partial front view of the vicinity of the end of the bobbin attached to the bobbin holder and the thread hooking arm at the thread hooking position, as viewed from the width direction of the machine base. FIG. [Figure 5] 10 is a schematic diagram showing the winding section when the threading arm is in the standby position and the thread is held by the thread holding section; FIG. [Figure 6] 10 is a diagram showing the state of the winding section when the threading arm has moved to the threading position; FIG. [Figure 7] 10 is a partial perspective view of the vicinity of the end of the bobbin, showing the thread held by the thread holding portion of the threading arm when the threading arm is in the threading position; FIG. [Figure 8] FIG. 10 is a partial perspective view of the vicinity of the end of the bobbin, showing the state when the yarn is held by the bunch guide during bunch winding. [Figure 9] FIG. 10 is a partial perspective view of the vicinity of the end of the bobbin, showing the state when the yarn is caught by the traverse guide after the bunch winding is completed. [Figure 10] 10A and 10B are diagrams showing a thread locking portion according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0030] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0031] (Overall configuration of false twisting machine 1) Fig. 1 is a side view showing the schematic configuration of a false twisting machine 1 according to this embodiment. Hereinafter, the direction perpendicular to the plane of the paper in Fig. 1 will be referred to as the machine base longitudinal direction, and the left-right direction on the plane of the paper will be referred to as the machine base width direction. The direction perpendicular to both the machine base longitudinal direction and the machine base width direction will be referred to as the up-down direction (vertical direction) in which gravity acts. The following explanation will use the above directional terms as appropriate.

[0032] The false twisting machine 1 is configured to be able to false twist a yarn Y made of a synthetic fiber such as nylon (a polyamide fiber). The false twisting machine 1 includes a yarn supplying section 2 for supplying the yarn Y, a processing section 3 for false twisting the yarn Y supplied from the yarn supplying section 2, and a winding section 4 for winding the yarn Y processed by the processing section 3 onto a bobbin Bw. The components of the yarn supplying section 2, the processing section 3, and the winding section 4 are arranged in multiple rows in the machine frame longitudinal direction, perpendicular to the yarn running plane (the plane of the paper in FIG. 1 ) along which the yarn path from the yarn supplying section 2 through the processing section 3 to the winding section 4 is located.

[0033] The yarn supplying section 2 has a creel stand 7 that holds a plurality of yarn supply packages Ps, and supplies a plurality of yarns Y to the processing section 3. The processing section 3 is configured to include, in order from the upstream side in the yarn running direction, a first feed roller 11, a twist stop guide 12, a first heating device 13, a cooling device 14, a false twist device 15, a second feed roller 16, an entangling device 17, a third feed roller 18, a second heating device 19, and a fourth feed roller 20. The winding section 4 winds the yarn Y that has been false twisted in the processing section 3 onto a bobbin Bw using a winding device 21 to form a winding package Pw.

[0034] The false twisting machine 1 also has a main machine base 8 and a winding table 9 arranged at an interval in the width direction of the machine base. The main machine base 8 and the winding table 9 extend over approximately the same length in the longitudinal direction of the machine base and are arranged to face each other. The upper part of the main machine base 8 and the upper part of the winding table 9 are connected by a support frame 10. The devices that make up the processing section 3 are mainly attached to the main machine base 8 and the support frame 10. The main machine base 8, the winding table 9, and the support frame 10 form a work space 22 in which an operator can perform work such as threading on each device. The yarn path is formed so that the yarn Y mainly runs around the work space 22.

[0035] The false twisting machine 1 has a unit called a span, which includes a pair of a main frame 8 and a winding frame 9 arranged opposite each other. In one span, the devices are arranged so that multiple yarns Y running side by side in the longitudinal direction of the machine can be false twisted simultaneously. As an example, the winding frame 9 included in one span is provided with a total of 12 winding devices 21 in three rows and four columns. The false twisting machine 1 is configured such that these spans are arranged symmetrically on the left and right of the page with the center line C in the width direction of the main frame 8 as the axis of symmetry (the main frame 8 is common to both the left and right spans), and multiple spans are arranged in the longitudinal direction of the machine.

[0036] (Configuration of processing part) Next, we will explain each component of the processing unit 3. The first feed roller 11 is used to feed the yarn Y supplied from the yarn supplying unit 2 to the first heating device 13. The first feed roller 11 is disposed above the winding table 9 (see FIG. 1). The first feed rollers 11 are arranged in a row in the longitudinal direction of the machine frame.

[0037] The twist stop guide 12 is intended to prevent the twist imparted to the yarn Y by the false twist device 15, which will be described later, from propagating upstream in the yarn running direction of the twist stop guide 12. The twist stop guide 12 is disposed downstream in the yarn running direction of the first feed roller 11 and upstream in the yarn running direction of the first heating device 13. The twist stop guides 12 are provided, for example, individually for the multiple yarns Y supplied from the yarn supplying section 2, and are arranged in a row in the machine longitudinal direction.

[0038] The first heating device 13 is for heating the yarn Y fed from the first feed roller 11, and is installed on the support frame 10 (see FIG. 1). A plurality of first heating devices 13 are provided corresponding to the plurality of yarns Y supplied from the yarn supplying section 2, and are arranged in a row in the longitudinal direction of the machine.

[0039] The cooling device 14 is for cooling the yarn Y heated by the first heating device 13. The cooling device 14 is arranged downstream in the yarn running direction of the first heating device 13 and upstream in the yarn running direction of the false twist device 15. A plurality of cooling devices 14 are provided for the plurality of yarns Y supplied from the yarn supplying section 2, and are arranged in a row in the machine longitudinal direction.

[0040] The false twist device 15 is a device for imparting twist to the yarn Y. The false twist device 15 is disposed immediately downstream of the cooling device 14 in the yarn running direction. A plurality of false twist devices 15 are arranged in the longitudinal direction of the machine. For example, 12 false twist devices 15 are provided per span.

[0041] The second feed roller 16 is a roller that feeds the yarn Y, which has been twisted by the false twist device 15, toward the intertwining device 17. The second feed roller 16 is disposed on the main machine base 8 downstream of the false twist device 15 in the yarn running direction. The conveyance speed of the yarn Y by the second feed roller 16 is faster than the conveyance speed of the yarn Y by the first feed roller 11. Therefore, the yarn Y is stretched between the first feed roller 11 and the second feed roller 16.

[0042] The intertwining device 17 is a device that intertwines the yarn Y by injecting air onto the yarn Y. The intertwining device 17 is disposed below the second feed roller 16 on the main machine base 8.

[0043] The third feed roller 18 is a roller that sends the yarn Y, which has been entangled by the entangling device 17, toward the second heating device 19. The third feed roller 18 is disposed below the entangling device 17 on the main machine base 8. The conveying speed of the yarn Y by the third feed roller 18 is slower than the conveying speed of the yarn Y by the second feed roller 16. Therefore, the yarn Y is relaxed between the second feed roller 16 and the third feed roller 18.

[0044] The second heating device 19 is a device for heating the yarn Y fed from the third feed roller 18. The second heating device 19 is disposed below the third feed roller 18 on the main machine base 8. The second heating devices 19 extend in the vertical direction, and one is provided for each span.

[0045] The fourth feed roller 20 is a roller that feeds the yarn Y that has been heat-treated by the second heating device 19 toward the winding device 21. The fourth feed roller 20 is disposed below the winding table 9. The conveying speed of the yarn Y by the fourth feed roller 20 is slower than the conveying speed of the yarn Y by the third feed roller 18. Therefore, the yarn Y is relaxed between the third feed roller 18 and the fourth feed roller 20.

[0046] In the processing unit 3 configured as described above, the yarn Y drawn between the first feed roller 11 and the second feed roller 16 is twisted by the false twist device 15. The twist formed by the false twist device 15 propagates to the twist stop guide 12 but does not propagate upstream of the twist stop guide 12 in the yarn traveling direction. The drawn and twisted yarn Y is heated and heat-set by the first heating device 13 and then cooled by the cooling device 14. The yarn Y is untwisted downstream from the false twist device 15, but the heat-set maintains the wavy false-twisted state of each filament. The yarn Y false-twisted by the false twist device 15 is relaxed between the second feed roller 16 and the third feed roller 18, entangled by the entanglement device 17, and guided downstream in the yarn traveling direction. The yarn Y is then heat-set by the second heating device 19 while being relaxed between the third feed roller 18 and the fourth feed roller 20. Finally, the yarn Y fed from the fourth feed roller 20 is wound by a winding device 21 to form a winding package Pw.

[0047] (Configuration of winding section 4) The winding section 4 has a plurality of winding devices 21. Each winding device 21 is a device for winding the yarn Y fed from the fourth feed roller 20 onto a bobbin Bw to form a winding package Pw. As shown in FIG. 2, each winding device 21 includes a pair of cradle arms 40, a contact roller 50, and a yarn threading device 60.

[0048] The pair of cradle arms 40 are configured to be able to clamp a bobbin Bw. Specifically, each of the pair of cradle arms 40 has a bobbin holder 41 that rotatably holds the bobbin Bw. Both ends of the bobbin Bw are rotatably supported by the cradle arm 40 via the bobbin holders 41. That is, the bobbin Bw is mounted while being sandwiched between the pair of bobbin holders 41. The bobbin holder 41 on one side in the longitudinal direction of the machine base is formed with a hook 41a (a thread hooking portion of the present invention) for hooking the thread Y onto the bobbin Bw (see FIGS. 3 and 4). The cradle arm 40 on one side in the longitudinal direction of the machine base is provided with a cutter 40a at a position opposite to the side where the traverse guide 72 is disposed in the width direction of the machine base. Here, the one side in the longitudinal direction of the machine base is the side close to the thread hooking position of a thread hooking arm 62 (described later), which is the right side of the paper in FIG. 2.

[0049] The contact roller 50 is driven to rotate in a fixed direction while in contact with the circumferential surface of the bobbin Bw or the winding package Pw, thereby rotating the bobbin Bw and winding the yarn Y. The contact roller 50 is driven by a package drive motor (not shown). The contact rollers 50 of each winding device 21 are driven simultaneously by a package drive motor common to multiple spindles. Note that each contact roller 50 may be driven by a package drive motor provided for each spindle.

[0050] The threading device 60 is a device for threading the thread Y onto a bobbin Bw that is attached while being sandwiched between a pair of bobbin holders 41. The threading device 60 includes a thread holding unit 61, the above-mentioned hook 41a, a threading arm 62 (corresponding to the threading member of the present invention), a traverse device 63, a control unit 64, and a bunch guide 65.

[0051] 5, the yarn holding unit 61 sucks and holds the yarn Y fed from the fourth feed roller 20. The yarn holding unit 61 is connected to a negative pressure source and is configured to be able to suck the yarn Y.

[0052] The threading arm 62 has a thread locking portion 62a that locks the yarn Y sucked and held by the thread holding portion 61. The threading arm 62 is movable between a threading position (the position of the threading arm 62 in FIG. 6) where the thread is threaded onto the hook 41a, and a standby position (the position of the threading arm 62 in FIGS. 2 and 5). The threading arm 62 moves between the threading position and the standby position by rotating about a rotation shaft 62b that extends in the vertical direction. The standby position is a position of the threading arm 62 where the threading arm 62 does not come into contact with the yarn Y extending from the fourth feed roller 20 to the thread holding portion 61, and where the threading arm 62 does not come into contact with the yarn Y being traversed by the traverse guide 72. The threading arm 62 is driven by a threading arm drive motor (not shown).

[0053] The thread locking portion 62a is formed at the tip of the threading arm 62. The thread locking portion 62a locks the thread Y held by the thread holding portion 61 when the threading arm 62 moves from the standby position to the threading position, and when the threading arm 62 is in the threading position, the thread Y is released as the thread is threaded on the hook 41a. Specifically, as shown in FIG. 4, the thread locking portion 62a has a first portion 62a1 and a second portion 62a2. The first portion 62a1 and the second portion 62a2 of the thread locking portion 62a are portions at which the thread Y held by the thread holding portion 61 is locked when the threading arm 62 moves from the standby position to the threading position. The second portion 62a2 of the thread locking portion 62a is a portion at which the thread Y is released as the thread is threaded on the hook 41a when the threading arm 62 is in the threading position. Specifically, the support portion 95 that supports the yarn Y of the second portion 62a2 from below is inclined downward, and when a downward force is applied, the yarn Y moves along the downwardly inclined support portion 95, causing the yarn Y to come off the second portion 62a2. When the threading arm 62 is in the standby position, the first portion 62a1 is located closer to the yarn Y that is sucked and held by the yarn holding portion 61 than the second portion 62a2. In other words, when the threading arm 62 is in the threading position, the second portion 62a2 is located closer to the traverse range r than the first portion 62a1.

[0054] The traverse device 63 traverses the yarn Y to be wound around the bobbin Bw within a traverse range r along the longitudinal direction of the machine (the axial direction of the bobbin holder 41). Specifically, the traverse device 63 has an endless timing belt 71 arranged near the contact roller 50 and a traverse guide 72 fixed to the timing belt 71. The timing belt 71 is stretched over driven pulleys 81 and 82 installed at both ends of the traverse guide 72 in the traverse direction, and a drive pulley 83 driven by a traverse guide drive motor 90. By driving the traverse guide drive motor 90, the traverse guide 72 can be reciprocated within a predetermined traverse range r via the drive pulley 83 and the timing belt 71. In this embodiment, the traverse guide 72 is configured to be able to capture the yarn Y when moving from one side (the right side in Figure 2) to the other side (the left side in Figure 2) in the longitudinal direction of the machine base, but is not able to capture the yarn Y when moving from the other side to one side in the longitudinal direction of the machine base.

[0055] The false twisting machine 1 of this embodiment has a traverse fulcrum guide 100 and a guide body 101 between the fourth feed roller 20 and the winding device 21. As shown in Fig. 2, the yarn Y fed by the fourth feed roller 20 is supplied to the winding device 21 while being guided by the traverse fulcrum guide 100 and the guide body 101, and is wound onto a bobbin Bw while being traversed by a traverse guide 72.

[0056] The control unit 64 controls the drive of a package drive motor (not shown), a threading arm drive motor (not shown), and a traverse guide drive motor 90. The control unit 64 controls the drive timing of the threading arm drive motor (not shown) and the traverse guide drive motor 90 based on a signal sent from a rotation speed detection sensor (not shown) that monitors the rotation speed of the bobbin holder 41. Specifically, when the rotation speed detection sensor detects that the rotation speed of the bobbin holder 41 has reached a target value, the control unit 64 drives the threading arm drive motor and the traverse guide drive motor to start the threading operation. The rotation speed detection sensor includes, for example, a magnet attached to a part of the bobbin holder 41 and a magnetic sensor attached to the cradle arm 40. The rotation speed detection sensor monitors the rotation speed of the bobbin holder 41 by using the magnetic sensor to detect a magnetic period generated from the magnet that rotates in accordance with the rotation of the bobbin holder 41. The control unit 64 may be common to each winding device 21, or may be provided for each winding device 21. Furthermore, the control unit that controls the drive of the package drive motor and the control unit that controls the drive of the yarn threading arm drive motor and the traverse guide drive motor 90 may be configured differently.

[0057] The bunch guide 65 holds the yarn Y that has come off the yarn catch portion 62a so as to maintain it at a bunch winding position x (see FIG. 2, etc.) that is outside the traverse range r of the bobbin Bw. The bunch winding position x is a position where the yarn Y is wound in bunches in an area outside the traverse range r of the bobbin Bw attached to the bobbin holder 41. The bunch winding is formed so that the winding start end of the yarn Y can be taken out when the ends of the yarn Y of multiple winding packages Pw are joined together in a subsequent process.

[0058] As shown in FIGS. 3 and 4, the bunch guide 65 is, for example, a bent rod-shaped member extending in the longitudinal direction of the machine frame. The bunch guide 65 is disposed below the threading arm 62 at the threading position. The bunch guide 65 has a holding portion 65a that holds the yarn Y while restricting movement of the yarn Y into the traverse range r, and a guide portion 65b that guides the yarn Y that has left the yarn locking portion 62a to the holding portion 65a. As shown in FIG. 4, the guide portion 65b is located closer to the traverse range r than the holding portion 65a in the longitudinal direction of the machine frame. A portion of the guide portion 65b is disposed on the yarn path of the yarn Y that runs from the traverse fulcrum guide 100 to the hook 41a. In other words, a portion of the guide portion 65b is disposed on the yarn path of the yarn Y that has been hooked on the hook 41a, upstream of the hook 41a in the yarn running direction. The holding portion 65a includes an inclined portion 65a1 that slopes downward from the traverse range r in the machine frame longitudinal direction toward the bunch winding position x, and a horizontal portion 65a2 that extends horizontally in the machine frame longitudinal direction. The inclined portion 65a1 and the horizontal portion 65a2 are integrally formed. The inclined portion 65a1 restricts movement of the yarn Y into the traverse range r, and the horizontal portion 65a2 holds the yarn Y at a predetermined height. The predetermined height is a height at which the traverse guide 72 can easily capture the yarn Y as it moves along the machine frame longitudinal direction. The predetermined height also prevents the held yarn Y from coming into contact with other components of the winding device 21. The horizontal portion 65a2 prevents the yarn Y from moving below the predetermined height. The bunch guide 65 is positioned so that the yarn path of the yarn Y held by the holding portion 65a intersects with the movement trajectory of the traverse guide 72. The holding portion 65a and the guiding portion 65b are integrally formed. The guiding portion 65b is inclined downward in a direction from the traverse range r in the machine longitudinal direction toward the bunch winding position x. In this embodiment, the inclination angle of the inclined portion 65a1 of the holding portion 65a with respect to the horizontal plane is larger than the inclination angle of the guiding portion 65b with respect to the horizontal plane. The inclined portion 65a1 with a larger inclination angle with respect to the horizontal plane restricts movement of the yarn Y held by the horizontal portion 65a2 into the traverse range r.

[0059] 4, a part of the guide portion 65b is located closer to the traverse range r than the yarn locking portion 62a of the yarn threading arm 62 at the yarn threading position. Furthermore, the bunch guide 65 is located closer to the bobbin holder 41 than the traverse guide 72 in the yarn running direction in which the yarn Y runs.

[0060] (Threading operation) Next, a series of operations from when the yarn Y is hooked on the hook 41a by the yarn hooking device 60 until when the yarn Y is traversed by the traverse guide 72 will be described below with reference to FIGS.

[0061] 5, the yarn Y fed from the fourth feed roller 20 is sucked and held by the yarn holder 61. At this time, the control unit 64 controls the yarn threading arm drive motor to position the yarn threading arm 62 at the standby position.

[0062] Next, the control unit 64 executes a guide standby step in which the traverse guide 72 is placed on standby at a predetermined position, which is a position on the opposite side of the traverse range r with respect to the yarn Y held by the bunch guide 65 in a yarn holding step described below. That is, the control unit 64 places the traverse guide 72 on standby at the predetermined position before the yarn threading arm 62 starts moving from the standby position to the yarn threading position. The predetermined position is, for example, set in advance and stored in the control unit 64. The predetermined position is usually a position near the bunch guide 65.

[0063] Next, as shown in Fig. 6, the control unit 64 drives the threading arm drive motor to move the threading arm 62 from the standby position to the threading position around the rotation shaft 62b. While the threading arm 62 is moving from the standby position to the threading position, the control unit 64 executes a thread locking process in which the yarn Y, which is sucked and held by the thread holding unit 61, is locked by the first portion 62a1 and the second portion 62a2 of the thread locking unit 62a. Specifically, while the threading arm 62 is moving from the standby position to the threading position, the first portion 62a1 comes into contact with a portion of the yarn Y, which is sucked and held by the thread holding unit 61, that is upstream of the yarn holding unit 61 in the yarn running direction. After the first portion 62a1 comes into contact with the yarn Y, the threading arm 62 moves further toward the threading position, whereby the yarn Y is locked by the first portion 62a1.

[0064] Furthermore, the yarn Y held by the second portion 62a2 is held by both the first portion 62a1 and the second portion 62a2 while the threading arm 62 reaches the threading position, and is stretched between the first portion 62a1 and the second portion 62a2 (see FIG. 7). The downstream end of the yarn Y held by the yarn holding portion 62a in the yarn running direction is attracted and held by the yarn holding portion 61.

[0065] As shown in FIG. 7, when the threading arm 62 reaches the threading position, the portion of the thread Y stretched between the first portion 62a1 and the second portion 62a2 is hooked onto the hook 41a of the bobbin holder 41, which rotates in the direction of the arrow in FIG. 7. Then, the thread Y hooked onto the hook 41a is wound around the end of the bobbin Bw as the bobbin Bw rotates. At this time, the thread Y hooked onto the hook 41a and locked onto the second portion 62a2 is pulled downward as the bobbin holder 41 rotates, moves downward along the downwardly inclined support portion 95, and is released from the second portion 62a2. That is, in this embodiment, the second portion 62a2 is configured to release the thread Y as the thread Y is hooked onto the hook 41a formed on the bobbin holder 41. The yarn Y that has come off the second portion 62a2 comes into contact with the guiding portion 65b of the bunch guide 65, and then moves along the slope of the guiding portion 65b to be guided to the holding portion 65a. Then, as shown in Fig. 8, the holding portion 65a holds the yarn Y so as to maintain it at the bunch winding position x around the bobbin Bw. That is, as described above, a yarn holding step is executed in which the yarn Y that has come off the yarn locking portion 62a as the yarn Y is threaded onto the end of the bobbin Bw at the yarn threading position is held so as to maintain it at the bunch winding position x around the bobbin Bw by the bunch guide 65. In the yarn holding step, the yarn Y is bunch-wound around the bobbin Bw at the bunch winding position x.

[0066] The yarn Y that has come off the second portion 62a2 is held by the bunch guide 65 at a portion upstream of the hook 41a in the yarn traveling direction, and is locked by the first portion 62a1 at a portion downstream of the hook 41a in the yarn traveling direction. In this state, as the bobbin holder 41 rotates further, the yarn Y that has been hooked on the hook 41a is guided to the position of the cutter 40a provided on the cradle arm 40, and is cut by the cutter 40a. The yarn Y that has been cut by the cutter 40a and is downstream of the cutter 40a in the yarn traveling direction is sucked into the yarn holding unit 61 and collected.

[0067] The control unit 64 may start driving the package drive motor, which rotates the contact roller 50 to rotate the bobbin Bw and the bobbin holder 41 integrally, after the threading arm 62 reaches the threading position, or may start driving the package drive motor before the threading arm 62 reaches the threading position.

[0068] As shown in Fig. 9, when bunch winding is completed, the control unit 64 executes a traverse process in which the traverse guide 72 is moved from a predetermined position into a traverse range r to perform traverse. In the traverse process, the yarn Y held by the bunch guide 65 is captured by the traverse guide 72, which moves from a predetermined position into the traverse range r. The yarn Y captured by the traverse guide 72 then moves along the inclined portion 65a1 of the holding portion 65a and the inclination of the guide portion 65b, and then leaves the guide portion 65b. In other words, the bunch guide 65 is configured so that the held yarn Y is captured by the traverse guide 72, which moves from the predetermined position into the traverse range r, and leaves the bunch guide 65.

[0069] In this way, a series of operations from when the yarn Y is hooked on the hook 41a by the yarn hooking device 60 to when the yarn Y is traversed by the traverse guide 72 is completed.

[0070] (effect) The threading device 60 of this embodiment includes a thread holding unit 61, a hook 41a, a threading arm 62 having a thread locking unit 62a, a traverse guide 72, a control unit 64, and a bunch guide 65. The thread locking unit 62a locks the thread Y held by the thread holding unit 61 as the threading arm 62 moves from the standby position to the threading position, and when the threading arm 62 is in the threading position, the thread Y is released as the thread is threaded on the hook 41a. The bunch guide 65 holds the yarn Y that has been released from the thread locking unit 62a so as to maintain it at a bunch winding position x that is outside the traverse range r of the bobbin Bw. The control unit 64 controls the traverse guide 72 to move between a predetermined position, which is a position on the opposite side of the traverse range r relative to the yarn Y held by the bunch guide 65, and within the traverse range r. The bunch guide 65 is configured so that the yarn Y held by it is caught by the traverse guide 72 that moves from a predetermined position into the traverse range r, and then released from the bunch guide 65.

[0071] The yarn threading method of this embodiment also performs a yarn locking step of locking the yarn Y held by the yarn holding portion 61 with the yarn locking portion 62a, a yarn holding step of holding the yarn Y that has come off the yarn locking portion 62a at the yarn threading position with the bunch guide 65, a guide standby step of keeping the traverse guide 72 on standby at a predetermined position, and a traverse step of moving the traverse guide 72 from the predetermined position into a traverse range r. In the traverse step, the yarn Y held by the bunch guide 65 is captured by the traverse guide 72, which moves from the predetermined position into the traverse range r, and is released from the bunch guide 65.

[0072] According to the configuration of the above embodiment, the yarn Y disengages from the yarn holding portion 62a as it is threaded onto the hook 41a, and is held by the bunch guide 65 so as to maintain the yarn at the bunch winding position x on the bobbin Bw. After bunch winding is completed, the yarn Y held by the bunch guide 65 is caught by the traverse guide 72, which moves from a predetermined position into the traverse range r, and is released from the bunch guide 65. Therefore, during the time that has elapsed since the yarn Y disengaged from the yarn holding portion 62a until it is caught by the traverse guide 72, the yarn Y does not exist in the traverse range r, and straight winding in the traverse range r can be prevented.

[0073] In the yarn threading device 60 of this embodiment, the control unit 64 keeps the traverse guide 72 waiting at a predetermined position before threading the yarn onto the hook 41a, and when bunch winding is completed, moves the traverse guide 72, which is at the predetermined position, into the traverse range r.

[0074] During the period from the completion of bunch winding until traverse is performed, the winding tension of the yarn Y is lower than when the yarn Y is being traversed by the traverse guide 72. The longer the low winding tension of the yarn Y continues, the greater the amount of slack in the yarn Y. This increases the risk of the yarn Y being wound around the fourth feed roller 20, the main machine base 8, or other components located upstream of the winding device 21 in the yarn running direction, resulting in yarn breakage. According to the above embodiment, after bunch winding is completed, the yarn Y is quickly captured by the traverse guide 72, which has been placed in a predetermined position, and traverse is initiated. This shortens the time during which the winding tension of the yarn Y is low without traversing. This reduces the amount of slack in the yarn Y when the yarn is wound onto the bobbin Bw. This also reduces the risk of the yarn Y being wound around the fourth feed roller 20 or other components, resulting in yarn breakage.

[0075] In the yarn threading device 60 of this embodiment, the traverse guide 72 is driven by a traverse guide drive motor 90. By driving the traverse guide 72 by the traverse guide drive motor 90, it becomes easier to control the time during which bunch winding is performed. This allows for more accurate adjustment of the bunch winding amount.

[0076] In the yarn threading device 60 of this embodiment, the bunch guide 65 has a holding portion 65a that holds the yarn Y while restricting movement of the yarn Y into the traverse range r, and a guiding portion 65b that guides the yarn Y that has come off the yarn locking portion 62a to the holding portion 65a. This allows the guiding portion 65b to guide the yarn Y that has been released from the yarn locking portion 62a to the holding portion 65a. Therefore, the yarn Y that has been released from the yarn locking portion 62a can be more reliably guided to the bunch winding position x on the bobbin Bw.

[0077] In the threading device 60 of this embodiment, a part of the guiding portion 65b is located closer to the traverse range r than the thread locking portion 62a of the threading arm 62 that is in the threading position. This allows the thread Y to be more reliably guided to the holding portion 65a by the guiding portion 65b, even if the thread Y that has come off the thread locking portion 62a moves closer to the traverse range r than the thread locking portion 62a.

[0078] In the threading device 60 of this embodiment, the holding portion 65a and the guiding portion 65b are integrally formed. As a result, there is no gap between the holding portion 65a and the guiding portion 65b, and the yarn Y is smoothly guided from the guiding portion 65b toward the holding portion 65a without dropping off along the way.

[0079] In the yarn threading device 60 of this embodiment, at least a part of the guide portion 65b is disposed on the yarn path of the yarn Y hooked on the hook 41a, upstream of the hook 41a in the yarn traveling direction. The bunch guide 65 is disposed closer to the bobbin holder 41 than the traverse guide 72 in the yarn traveling direction in which the yarn Y travels.

[0080] Generally, the yarn Y fed to the bobbin Bw supported by the bobbin holder 41 is guided by a traverse fulcrum guide 100 located upstream of the bobbin holder 41 in the yarn running direction and near the center of the bobbin Bw in the machine longitudinal direction. Meanwhile, the yarn retaining portion 62a of the threading arm 62 at the threading position is located near the hook 41a. Therefore, when the yarn is threaded onto the hook 41a, an oblique yarn path is formed from the traverse fulcrum guide 100 toward the hook 41a. The yarn retaining portion 62 a In order to reliably hold the yarn Y that has come off the traverse fulcrum guide 100 in the bunch guide 65, at least the guiding portion 65b of the bunch guide 65 needs to be positioned on the yarn path from the traverse fulcrum guide 100 to the hook 41a. Here, if the bunch guide 65 is positioned away from the bobbin holder 41 in the yarn running direction, the bunch guide 65 must be positioned closer to the center of the traverse fulcrum guide 100 in the longitudinal direction of the machine frame, and the bunch guide 65 will be positioned away from the bunch winding position x toward the traverse range r in the longitudinal direction of the machine frame. In this case, the yarn Y that has come close to the traverse range r due to being held by the bunch guide 65 must be returned to the bunch winding position x, which may widen the bunch winding width. If the bunch winding width widens too much, the yarn Y during bunch winding may enter the traverse range r. If the bunch guide 65 is disposed in this manner away from the bunch winding position x toward the traverse range r in the machine body longitudinal direction, it becomes difficult to maintain the yarn Y held by the bunch guide 65 at the bunch winding position x. According to this embodiment, a part of the guiding portion 65b is disposed on the yarn path of the yarn Y hooked on the hook 41a, upstream of the hook 41a in the yarn running direction. The bunch guide 65 is located closer to the bobbin holder 41 than the traverse guide 72 in the yarn running direction. Therefore, the bunch guide 65 can be disposed in a position closer to the bunch winding position x in the machine body longitudinal direction, and the yarn Y can be reliably held so as to be maintained at the bunch winding position x.

[0081] In the yarn threading device 60 of this embodiment, the control unit 64 causes the traverse guide 72 to wait at a predetermined position before the yarn threading arm 62 starts moving from the standby position to the yarn threading position. This makes it possible to prevent the yarn Y, which has come off the yarn threading arm 62 that has reached the yarn threading position and is held by the bunch guide 65, from coming into contact with the traverse guide 72 that is moving from within the traverse range r to the predetermined position. This makes it possible to prevent the position where the bunch winding is performed on the bobbin Bw from shifting from the actual bunch winding position x.

[0082] In the threading device 60 of this embodiment, the thread locking part 62a has a downwardly inclined support portion 95 that supports the thread Y from below, and is configured so that the thread Y moves downward along the support portion 95 as the thread is threaded onto the hook 41a, thereby releasing the thread Y. According to this embodiment, when a downward force acts on the thread Y as the thread is threaded, the thread Y moves along the downwardly inclined support portion 95, and the thread Y releases from the thread locking part 62a. Therefore, without requiring a complex configuration, the thread Y can be reliably released from the thread locking part 62a as the thread is threaded.

[0083] (Variation) The following describes modifications of the above embodiment, but the same reference numerals are used to designate components having the same configuration as the above embodiment, and the description thereof will be omitted as appropriate.

[0084] In the above embodiment, the threading arm 62 is driven by a threading arm drive motor. However, the threading arm 62 may also be driven by an air cylinder or the like. In this case, the solenoid valve or the like for operating the air cylinder is controlled by the control unit 64.

[0085] In the above embodiment, a part of the guiding portion 65b is located closer to the traverse range r than the yarn locking portion 62a of the threading arm 62 at the threading position. However, the entire guiding portion 65b may be located closer to the traverse range r than the yarn locking portion 62a of the threading arm 62 at the threading position. Alternatively, the bunch guide 65 may be configured to have only the holding portion 65a.

[0086] In the above embodiment, the bunch guide 65 is a bent rod-shaped member. However, the bunch guide 65 may be a straight rod-shaped member. In this case, the bunch guide 65 is inclined downward along the direction from the traverse range r in the machine base longitudinal direction toward the bunch winding position x. Furthermore, the bunch guide 65 may be a plate-shaped member or a member of another shape.

[0087] In the above embodiment, the holding portion 65a and the guiding portion 65b are integrally formed, but the holding portion 65a and the guiding portion 65b may be separate members.

[0088] In the above embodiment, the bunch guide 65 is closer to the bobbin holder than the traverse guide 72 in the yarn running direction. 41 However, the bunch guide 65 may be arranged closer to the fourth feed roller 20 than the traverse guide 72 in the yarn running direction.

[0089] In the above embodiment, the holding portion 65a includes an inclined portion 65a1 and a horizontal portion 65a2. However, the holding portion 65a may also have an inclined portion inclined downward in the direction from the traverse range r in the longitudinal direction of the machine base toward the bunch winding position x, and an inclined portion inclined upward in the direction from the traverse range r in the longitudinal direction of the machine base toward the bunch winding position x. In this case, the downward inclined portion restricts movement of the yarn Y into the traverse range r, and the portion where the downward inclined portion and the upward inclined portion connect serves to hold the yarn Y at a predetermined height. Alternatively, the holding portion 65a may also have a first inclined portion inclined downward in the direction from the traverse range r in the longitudinal direction of the machine base toward the bunch winding position x, and a second inclined portion inclined downward in the direction from the traverse range r in the longitudinal direction of the machine base toward the bunch winding position x, with an inclination angle relative to the horizontal plane smaller than that of the first inclined portion. In this case, the first inclined portion serves to restrict movement of the yarn Y into the traverse range r, and the second inclined portion serves to hold the yarn Y at a predetermined height. To move the yarn Y held by the holding portion 65a from within the traverse range r in the machine frame longitudinal direction toward the bunch winding position x, the inclination angle with respect to the horizontal plane must be equal to or greater than a predetermined value. When the yarn Y is positioned in the second inclined portion, which has a small inclination angle with respect to the horizontal plane, the yarn Y does not move any further from within the traverse range r in the machine frame longitudinal direction toward the bunch winding position x, but comes to rest at any point on the second inclined portion. The predetermined value is determined by the running speed of the yarn Y, the position of the bunch guide 65, the position of the bobbin Bw, and the like.

[0090] In the above embodiment, the guide standby step is performed before the yarn locking step. That is, the control unit 64 causes the traverse guide 72 to wait at a predetermined position before the threading arm 62 starts moving from the standby position to the threading position. However, the guide standby step may be performed simultaneously with the yarn locking step, after the yarn locking step, or after the yarn holding step. In other words, the control unit 64 may move the traverse guide 72 to a predetermined position after the threading arm 62 arrives at the threading position, or may move the traverse guide 72 to a predetermined position after the yarn Y is hooked on the hook 41a. When the guide standby step is performed simultaneously with the yarn locking step or after the yarn locking step and before the yarn holding step, the control unit 64 moves the traverse guide 72 to a predetermined position so as not to come into contact with the yarn Y locked by the threading arm 62 moving from the standby position to the threading position. When the guide standby step is performed after the yarn holding step, the control unit 64 moves the traverse guide 72 to a predetermined position so that the traverse guide 72 passes under the yarn Y held by the bunch guide 65.

[0091] In the above embodiment, the traverse guide 72 is driven by a traverse guide drive motor 90. The type of motor is not particularly limited, but for example, the traverse guide drive motor 90 may be a motor with an encoder. In this case, the yarn threading arm 6 A sensor is provided at the threading position of 2. The sensor detects the threading arm 6 When it is detected that the traverse guide 2 has reached the threading position, the control unit 64 controls the driving of the traverse guide drive motor 90 based on the detection signal.

[0092] In the above embodiment, the thread locking portion 62a has a downwardly inclined support portion 95 that supports the thread Y from below. The thread Y supported by the thread locking portion 62a moves along the downwardly inclined support portion 95 as the thread is threaded onto the hook 41a, thereby disengaging from the thread locking portion 62a. However, as shown in FIG. 10 , the thread locking portion 162a may have a support portion 195 that supports the thread Y from below, and that is formed on a rotating lever 171. A movable lever 171 and a stopper 174 are attached to the lower portion of the second portion 162a2 of the thread locking portion 162a. The lever 171 is formed with a support portion 195 that supports the thread Y from below. The support portion 195 is inclined upward. The lever 171 is rotatable about a rotation shaft 172 whose axial direction is the width direction of the machine base. Furthermore, the lever 171 is connected to the first portion 161a1 of the thread locking portion 162a via a biasing mechanism 173. The biasing mechanism 173 is, for example, a spring member. The biasing mechanism 173 biases the lever 171 in the direction from the second portion 162a2 toward the first portion 162a1 in the longitudinal direction of the machine base. The lever 171 biased by the biasing mechanism 173 attempts to rotate clockwise when viewed in the width direction of the machine base, but the rotation is restricted by abutting against a stopper 174 (see FIG. 10 ). When the thread Y is supported by the support portion 195 and pulled downward as the thread is threaded onto the hook 41a, a downward force is applied from the thread Y to the support portion 195, pushing the lever 171 downward. As a result, the lever 171 rotates counterclockwise (in the direction of the solid arrow in FIG. 10) when viewed from the width direction of the machine frame against the biasing force of the biasing mechanism 173, and eventually the inclination of the support portion 195 becomes downward. Then, the yarn Y moves along the downwardly inclined support portion 195, and the yarn Y is released from the second portion 162a2. Note that the lever 171 may rotate automatically, and the timing of the rotation may be controllable.

[0093] In the above embodiment, the threading device 60 is applied to the winding device 21 of the false twisting machine 1. However, the threading device 60 is not limited to the false twisting machine 1, and can also be applied to the winding device of a rewinder. [Explanation of symbols]

[0094] 1 False twisting machine 40 Cradle Arm 41 Bobbin holder 41a Hook (thread hook) 60 Threading device 61 Thread holder 62 Threading arm (threading component) 62a Thread retaining portion 65 Bunch Guide 65a Holding part 65b Induction part 72 Traverse Guide 95 Support part Bw bobbin r Traverse range x Bunch winding position Pw Winding package Y thread

Claims

1. A threading device for threading a thread onto a bobbin that is attached while being sandwiched between a pair of bobbin holders, a thread holding portion that holds the thread; a thread hook portion formed on one of the pair of bobbin holders; a thread hooking member having a thread hooking portion at which the thread held in the thread holding portion is hooked, the thread hooking member being movable between a thread hooking position where the thread is hooked onto the thread hooking portion and a standby position; a traverse guide that reciprocates along an axial direction of the bobbin holder to traverse the yarn wound around the bobbin within a traverse range; a control unit that controls the drive of the traverse guide, the yarn hooking portion hooks the yarn held by the yarn holding portion while the yarn hooking member is moving from the standby position to the yarn hooking position, and when the yarn hooking member is at the yarn hooking position, the yarn is released as the yarn is hooked onto the yarn hooking portion, a bunch guide configured to hold the yarn hooked on the yarn hooking portion so as to maintain the yarn at a bunch winding position outside the traverse range of the bobbin, The control unit controlling the traverse guide to move between a predetermined position, which is a position on the opposite side of the traverse range with respect to the yarn held by the bunch guide, and within the traverse range; The yarn threading device is characterized in that the bunch guide is configured so that the yarn it holds is captured by the traverse guide which moves from the predetermined position into the traverse range, and the yarn is released from the bunch guide.

2. The control unit The traverse guide is kept waiting at the predetermined position before the yarn is hooked onto the yarn hooking portion, 2. The yarn threading device according to claim 1, wherein the traverse guide, which is in the predetermined position, is moved into the traverse range when bunch winding is completed.

3. 3. The yarn threading device according to claim 1, wherein the traverse guide is driven by a motor.

4. 4. The yarn threading device according to claim 1, wherein the bunch guide has a holding portion that holds the yarn while restricting movement of the yarn within the traverse range, and a guiding portion that guides the yarn that has come off the yarn catch portion to the holding portion.

5. The yarn threading device according to claim 4, wherein at least a part of the guide portion is located closer to the traverse range than the yarn locking portion of the yarn threading member that is in the yarn threading position.

6. 6. The yarn threading device according to claim 4, wherein the holding portion and the guiding portion are integrally formed.

7. At least a part of the guide portion is disposed on a yarn path of the yarn hooked at the yarn hooking portion, the yarn path being upstream of the yarn hooking portion in a yarn running direction in which the yarn runs, 7. The yarn threading device according to claim 4, wherein the bunch guide is disposed closer to the bobbin holder than the traverse guide in the yarn running direction.

8. The yarn threading device according to any one of claims 1 to 7, characterized in that the control unit causes the traverse guide to wait at the predetermined position before the yarn threading member starts moving from the standby position to the yarn threading position.

9. The thread locking portion is a downwardly inclined support portion that supports the yarn from below, The threading device according to any one of claims 1 to 8, characterized in that the thread is configured to be released by moving downward along the support portion as the thread is threaded onto the thread hook portion.

10. a yarn supplying section for supplying a yarn; a processing unit for false twisting the yarn supplied from the yarn supplying unit; a winding unit for winding the yarn that has been false twisted in the processing unit, The winding section a winding device that winds a yarn onto a bobbin attached to a bobbin holder to form a package; A false twisting machine comprising the yarn threading device according to any one of claims 1 to 9.

11. a thread holding portion that holds the thread; a thread hook formed on one of the pair of bobbin holders; a thread hooking member having a thread hooking portion at which the thread held in the thread holding portion is hooked, the thread hooking member being movable between a thread hooking position where the thread is hooked onto the thread hooking portion and a standby position; a traverse guide that reciprocates along the axial direction of the bobbin holders to traverse a yarn that is to be wound around a bobbin that is sandwiched between the pair of bobbin holders within a traverse range; a bunch guide that holds the yarn hooked on the yarn hooking portion so as to maintain the yarn at a bunch winding position outside the traverse range of the bobbin; A threading method for threading a thread onto the bobbin using a threading device comprising: a yarn locking step of locking the yarn held in the yarn holding portion to the yarn locking portion while the yarn hooking member is moving from the standby position to the yarn hooking position; a yarn holding step of holding the yarn, which has come off the yarn holding portion as the yarn is hooked onto the yarn hooking portion at the yarn hooking position, by the bunch guide so as to maintain the yarn at the bunch winding position; a guide standby step of causing the traverse guide to wait at a predetermined position that is a position on the opposite side of the traverse range with respect to the yarn held by the bunch guide; a traverse step of moving the traverse guide in the predetermined position within the traverse range, a traverse guide that moves from the predetermined position into the traverse range to capture the yarn held by the bunch guide, and the yarn is released from the bunch guide.

Images