JP2022069097A - Thread winding machine - Google Patents

Abstract

To provide a thread winding machine than can surely reduce local abrasions of fulcrum guides and reduce costs for reducing the abrasions.SOLUTION: A plurality of fulcrum guides 16 are formed in roller shapes having central axes and are configured so that threads Y are hung on outer peripheral surfaces thereof. One or more fulcrum guides 16 of the plurality of fulcrum guides 16 are configured to freely rotate around the central axes. A thread winding machine is provided with a switching mechanism 30 that inhibits the one or more fulcrum guides 16 from rotating at the time of winding the threads and releases the inhibition of rotating of the one or more fulcrum guides 16 at the time other than the time of winding the threads.SELECTED DRAWING: Figure 3

Description

The present invention relates to a thread winder that winds a plurality of threads on a plurality of bobbins mounted on a take-up shaft while swinging a plurality of threads with a plurality of fulcrum guides arranged in the axial direction of the take-up shaft as fulcrums.

Conventionally, there has been known a thread winder that winds a plurality of threads spun from a spinning device while swinging them on a plurality of bobbins mounted on a winding shaft. In such a thread winder, a plurality of fulcrum guides, which serve as fulcrums for swinging the thread, are provided side by side in the axial direction of the winding shaft. For example, in Patent Documents 1 and 2, a roller-shaped fulcrum guide (guide roller in Patent Document 2) having a central axis extending in a direction orthogonal to the axial direction of the take-up shaft is provided, and the outer peripheral surface of the fulcrum guide is provided. The thread is hung. In Patent Document 1, the fulcrum guide is configured so as not to rotate around the central axis at the time of winding the spool. Further, in Patent Document 2, the fulcrum guide is a roller that can freely rotate around the central axis.

Japanese Unexamined Patent Publication No. 2013-23787 Japanese Patent Publication No. 2008-531438

When the fulcrum guide does not rotate at the time of winding the thread as in Patent Document 1, the thread traveling at high speed keeps in contact with the same portion of the outer peripheral surface of the fulcrum guide, so that local wear of the fulcrum guide tends to proceed. As a result, the contact state between the thread and the fulcrum guide changes, which may lead to deterioration of the quality of the thread. In this regard, Patent Document 1 is configured so that the fulcrum guide can be rotated by a motor, and the contact position with the thread can be changed. However, since a drive unit such as a motor for rotating the fulcrum guide is required, there is a problem that the cost is high.

On the other hand, since the fulcrum guide of Patent Document 2 is configured to be freely rotatable, the fulcrum guide is constantly rotated due to friction with the yarn during thread winding, and local wear can be suppressed. However, since the fulcrum guide is exposed to high-speed rotation, the bearing of the fulcrum guide is liable to be damaged at an early stage. For this reason, there has been a problem of cost increase due to bearing maintenance.

In view of the above problems, it is an object of the present invention to provide a bobbin winder capable of reducing local wear of the fulcrum guide and reducing the cost for that purpose.

INDUSTRIAL APPLICABILITY The present invention is a thread winder in which a plurality of threads are swung around a plurality of bobbins mounted on a winding shaft with a plurality of fulcrum guides arranged in the axial direction of the winding shaft as fulcrums. The fulcrum guide is in the shape of a roller having a central axis, and is configured so that the thread is hung on the outer peripheral surface thereof, and one or more of the plurality of fulcrum guides is around the central axis. It is configured to be freely rotatable, and a switching mechanism is provided to prohibit the rotation of the one or more fulcrum guides at the time of thread winding and to release the rotation prohibition of the one or more fulcrum guides at times other than the time of thread winding. It is characterized by being.

According to the present invention, the rotation of one or more fulcrum guides configured to be freely rotatable is prohibited by the switching mechanism at the time of spool winding. In other words, since the fulcrum guide does not rotate at high speed due to the running of the thread, it is possible to eliminate the need for the bearing of the fulcrum guide, and even if the bearing is provided, it is not exposed to high speed rotation for a long time, so it is early. Damage can be avoided. Therefore, it is possible to avoid an increase in cost due to bearing maintenance. Further, in the present invention, the rotation prohibition of the fulcrum guide is released by the switching mechanism except when the thread is wound. Therefore, if the thread is hooked on the fulcrum guide at that time, the thread comes into contact with the fulcrum guide. The fulcrum guide can be easily rotated by utilizing the tension of. Therefore, local wear of the fulcrum guide can be reduced, and a drive unit such as a motor for rotating the fulcrum guide becomes unnecessary. As described above, according to the present invention, local wear of the fulcrum guide can be reduced, and the cost for that can be reduced. Since it is not essential to rotate the fulcrum guide where local wear is not so problematic, such a fulcrum guide does not need to be configured to be freely rotatable.

In the present invention, the one or more fulcrum guides may include two fulcrum guides at both ends in the axial direction.

In a general thread winder, the closer to the end of a plurality of fulcrum guides arranged in the axial direction of the winding shaft, the larger the winding angle of the thread, the greater the surface pressure received from the thread, and wear It tends to be a problem. Therefore, if at least two fulcrum guides at both ends are configured to be freely rotatable, the problem of local wear of the fulcrum guides can be largely solved.

In the present invention, the one or more fulcrum guides may include all the fulcrum guides.

This will ensure that local wear is reduced for all fulcrum guides.

In the present invention, the switching mechanism engages with the gear portion formed in the fulcrum guide or the holding member holding the fulcrum guide and the gear portion at the time of winding the thread to prevent the rotation of the gear portion. It is preferable to have an engaging member and an engaging disengaging member that disengages the engaging member from the gear portion other than when the thread is wound.

According to such a configuration, the fulcrum guide can be switched to a freely rotatable state by disengaging the engaging member and the gear portion by the disengaging member.

In the present invention, the plurality of fulcrum guides are provided with a moving mechanism for moving the plurality of fulcrum guides between the winding position at the time of thread winding and the thread hooking position at the time of thread hooking work, and the disengagement member is the plurality of fulcrum guides. It is preferable to maintain the state in which the engagement member and the gear portion are disengaged when the thread is positioned at the thread hooking position.

According to such a configuration, since the fulcrum guide is in a state where it can freely rotate when the thread is hooked on the fulcrum guide, the fulcrum guide can be rotated when the thread is hung on the fulcrum guide.

In the present invention, the moving mechanism moves a plurality of sliders supporting the plurality of fulcrum guides, a guide rail to which the plurality of sliders are slidably attached, and the plurality of sliders along the guide rails. It is preferable to have a driving unit for driving.

With such a movement mechanism, the fulcrum guide can be moved by moving the slider along the guide rail.

In the present invention, when the plurality of fulcrum guides move from the winding position to the thread hooking position, it is preferable that the sliders adjacent to each other in the longitudinal direction of the guide rail are close to each other.

According to such a configuration, when the plurality of fulcrum guides are located at the thread hooking positions, the plurality of fulcrum guides are gathered in a close state, so that the thread hooking work becomes easy.

In the present invention, the engaging member has a protrusion protruding from the slider when the plurality of fulcrum guides are located at the winding position, and the plurality of fulcrum guides are said from the winding position. When moving to the thread hooking position, the slider adjacent to the slider as the disengagement member may press the protruding portion to disengage the engagement member from the gear portion.

According to such a configuration, since the adjacent slider functions as the disengagement member, it is not necessary to newly provide the disengagement member, and the increase in the number of parts can be suppressed.

In the present invention, the disengagement member is fixed to the guide rail or a fixing member to which the guide rail is directly or indirectly fixed, and the plurality of fulcrum guides are referred to from the winding position. When moving to the thread hooking position, the disengaging member may press the engaging member to disengage the engaging member from the gear portion.

According to such a configuration, since the disengagement member can be provided in common for a plurality of fulcrum guides, it is not necessary to provide the disengagement member for each fulcrum guide, and the number of disengagement members is reduced. be able to.

In the present invention, it is preferable that the urging member for urging the engaging member in the direction in which the engaging member engages with the gear portion is provided.

If such an urging member is provided, the rotation of the fulcrum guide can be reliably prevented by the engaging member at the time of winding the spool.

It is a side view of the spinning take-back apparatus which concerns on this embodiment. It is a side view of a guide unit. It is a figure which shows the operation of the switching mechanism of 1st Embodiment. It is sectional drawing which shows the switching mechanism of 1st Embodiment. It is a figure which shows the operation of the switching mechanism of 2nd Embodiment. It is a figure which shows the arrangement of the disengagement member of 2nd Embodiment.

Hereinafter, an embodiment in which the spooling machine according to the present invention is applied to a spinning take-up device will be described with reference to the drawings.

(Spinning take-up device)
FIG. 1 is a side view of the spinning take-up device according to the present embodiment. In the present specification, each of the front-back, left-right, up-down directions shown in FIG. 1 is defined as front-back, left-right, up-down of the spinning take-up device.

The spinning take-up device 1 is a device that picks up a plurality of threads Y (16 threads in this embodiment) spun from the spinning device 2, and includes godet rollers 3, 4 and a thread winder 10. The spinning device 2 is arranged above the spinning take-up device 1 and spins a plurality of threads Y made of synthetic resin. The godet rollers 3 and 4 are arranged below the spinning device 2 and are rotationally driven by a motor (not shown). The plurality of yarns Y spun from the spinning apparatus 2 are sent to the bobbin winder 10 via the godet rollers 3 and 4.

The bobbin winder 10 is arranged below the godet rollers 3 and 4. The bobbin winder 10 has two bobbin holders 13 (corresponding to the winding shaft of the present invention) that are cantilevered and supported by a turret 12 built in the machine base 11. The bobbin holder 13 extends in the front-rear direction (corresponding to the axial direction of the present invention), and its rear end is supported by the turret 12. A plurality of bobbins B can be mounted on the bobbin holder 13 in the front-rear direction. The bobbin holder 13 is rotationally driven around an axis by a motor (not shown).

The turret 12 is a disk-shaped member having a rotation axis parallel to the front-rear direction, and a bobbin holder 13 is attached to each of an upper position and a lower position different by 180 degrees in the circumferential direction. By rotating the turret 12, the two bobbin holders 13 move between the upper position and the lower position. In the bobbin holder 13 at the upper position, a plurality of threads Y are wound around a plurality of bobbins B to form a plurality of packages P. On the other hand, in the bobbin holder 13 at the lower position, the plurality of packages P are collected and the new plurality of bobbins B are mounted.

The bobbin winder 10 has a support frame 14 that is cantilevered and supported by the machine base 11. The rear end of the support frame 14 is supported by the machine base 11. A guide unit 15 is arranged above the support frame 14. The guide unit 15 is provided with the same number of fulcrum guides 16 as the number of threads Y (16 in this embodiment) arranged side by side in the front-rear direction. The support frame 14 is provided with the same number of traverse devices 17 as the number of threads Y arranged side by side in the front-rear direction. The traverse device 17 swings the thread Y in the front-rear direction with the corresponding fulcrum guide 16 as a fulcrum.

Below the support frame 14, a contact roller 18 rotatably supported by the support frame 14 is arranged. The contact roller 18 comes into contact with the outer peripheral surfaces of the plurality of packages P held by the bobbin holder 13 at the upper position. At the time of winding the thread, the contact roller 18 rotates while applying a predetermined contact pressure to the package P, so that the shape of the package P can be adjusted.

(Guide unit)
The configuration of the guide unit 15 will be described. FIG. 2 is a side view of the guide unit 15. FIG. 2A shows a state in which a plurality of fulcrum guides 16 are located at winding positions, and FIG. 2B shows a state in which a plurality of fulcrum guides 16 are located at thread hooking positions. The winding position is the position of the plurality of fulcrum guides 16 when the plurality of threads Y are wound around the plurality of bobbins B. The thread hooking position is the position of the plurality of fulcrum guides 16 when a plurality of threads Y are hung on the plurality of fulcrum guides 16. The plurality of fulcrum guides 16 are configured to be movable between the winding position and the thread hooking position by the moving mechanism 20.

The guide unit 15 includes a plurality of fulcrum guides 16 and a moving mechanism 20. The moving mechanism 20 has a plurality of sliders 21, guide rails 22, and an air cylinder 23 (corresponding to a drive unit of the present invention). The number of sliders 21 is the same as that of the fulcrum guides 16, and the fulcrum guides 16 are rotatably supported.

The fulcrum guide 16 is a roller-shaped member that protrudes to the right from the slider 21 (see FIG. 5) and has a central axis extending in a direction (left-right direction) orthogonal to the axial direction of the bobbin holder 13. The thread Y is hung on the outer peripheral surface of the fulcrum guide 16, and the thread Y travels in contact with the outer peripheral surface of the fulcrum guide 16 at the time of winding the thread. All fulcrum guides 16 are configured to be freely rotatable around a central axis.

The guide rail 22 is a member extending in the front-rear direction (corresponding to the longitudinal direction of the present invention), and is fixed to the support frame 14 via a bracket (not shown). A plurality of sliders 21 are slidably attached to the guide rail 22 in a state of being arranged in the front-rear direction. The sliders 21 adjacent to each other in the front-rear direction are connected to each other by a belt (not shown). A rod 23a of an air cylinder 23 is connected to the rearmost slider 21.

As shown in FIG. 2a, when the rod 23a of the air cylinder 23 is contracted, the plurality of sliders 21 are arranged in the front-rear direction while being separated from each other. That is, the plurality of fulcrum guides 16 are also arranged in the front-rear direction while being separated from each other. The positions of the plurality of fulcrum guides 16 at this time are the winding positions. When the plurality of fulcrum guides 16 are located at the winding positions, the contact points between the thread Y and each fulcrum guide 16, that is, the twill swing fulcrums of the thread Y are evenly spaced.

The yarn paths of the plurality of threads Y distributed from the godet roller 4 to the plurality of fulcrum guides 16 located at the winding position are symmetrical with respect to the vertical plane passing through the center of the plurality of fulcrum guides 16 in the front-rear direction. The eight threads Y in the front half are hung on the front side of the fulcrum guide 16, while the eight threads Y in the rear half are hung on the rear side of the fulcrum guide 16. Further, among the plurality of fulcrum guides 16, the closer to the end, the larger the winding angle of the thread Y, and as a result, the surface pressure of the thread Y is large, so that wear is likely to occur.

When threading the plurality of fulcrum guides 16, the air cylinder 23 is driven to extend the rod 23a. Then, the rearmost slider 21 connected to the rod 23a moves forward. Subsequently, the rearmost slider 21 abuts on the slider 21 adjacent to the front of the slider 21 and presses forward, and similarly, each slider 21 abuts on the slider 21 adjacent to the front of the slider 21 and presses forward. The term "contact" here includes not only a form in which the sliders 21 are in direct contact with each other but also a form in which the sliders 21 are indirectly in contact with each other via another member.

When the frontmost slider 21 comes into contact with a stopper (not shown) provided at the front end of the guide rail 22, the air cylinder 23 stops. As a result, all the sliders 21 are assembled in close proximity to the front end of the guide rail 22. The positions of the plurality of fulcrum guides 16 at this time are the thread hook positions. Since the plurality of fulcrum guides 16 located at the thread hooking positions are gathered at the front end portion of the guide rail 22 in a state of being close to each other, it is easy to perform the thread hooking work on the plurality of fulcrum guides 16. Instead of the stopper as described above, the front end portion of the guide rail 22 may be configured to function as a stopper, or the rod 23a of the air cylinder 23 may be configured to come into contact with the stopper and stop. May be good.

When the air cylinder 23 is driven to contract the rod 23a after the thread hooking work is completed, the rearmost slider 21 moves rearward. When the belt connecting the rearmost slider 21 and the slider 21 adjacent to the front of the slider 21 is fully extended, the slider 21 adjacent to the front is pulled backward. After that, by pulling each slider 21 backward in the same manner, the plurality of fulcrum guides 16 return to the winding position shown in FIG. 2A. The drive unit that moves the slider 21 is not limited to the air cylinder 23, and may be another actuator such as a motor.

(First Example of Rotation Mechanism)
The first embodiment of the rotation mechanism will be described. FIG. 3 is a diagram showing the operation of the switching mechanism 30 of the first embodiment. FIG. 4 is a cross-sectional view showing the switching mechanism 30 of the first embodiment, showing a cross section passing through the center of the fulcrum guide 16. FIG. 3a shows a state when the fulcrum guide 16 is located at the winding position, and FIG. 3b shows a state when the fulcrum guide 16 is located at the thread hooking position. The fulcrum guide 16 shown in FIG. 3 shows the frontmost fulcrum guide 16.

In this embodiment, the switching device 31 is provided on each slider 21, and the aggregate of the switching devices 31 provided on each slider 21 is the switching mechanism 30. The switching device 31 includes a gear portion 32a formed on the holding member 32 that holds the fulcrum guide 16, an engaging member 33 provided on the slider 21, and an adjacent slider 21 that functions as the disengaging member of the present invention. , And are configured.

As shown in FIG. 4, the fulcrum guide 16 is fixed to the holding member 32 and can rotate integrally with the holding member 32. The holding member 32 is attached to a mounting hole 21a formed on the surface (right surface) of the slider 21. A gear portion 32a is formed on a portion of the holding member 32 on the back side (left side) of the surface of the slider 21. The frictional force between the holding member 32 and the slider 21 is set to a small value such that the holding member 32 can freely rotate around the central axis of the fulcrum guide 16. As a result, the fulcrum guide 16 can freely rotate around the central axis. A bearing may be provided in the mounting hole 21a to rotate the holding member 32 more smoothly.

The engaging member 33 is a member that prevents the rotation of the gear portion 32a by engaging with the gear portion 32a. The engaging member 33 is a member in which a protruding portion 33a, an engaging portion 33b, and a connecting portion 33c are integrally formed. The protruding portion 33a is a portion that protrudes rearward from the slider 21 when the fulcrum guide 16 is located at the winding position. The engaging portion 33b is a portion that meshes with the gear portion 32a to prevent the rotation of the gear portion 32a. The connecting portion 33c is a portion connecting the protruding portion 33a and the engaging portion 33b. It is not essential that the protruding portion 33a protrudes rearward, and the protruding portion 33a may protrude in another direction as long as it is at a position pressed by the slider 21 adjacent to the rear.

A guide groove 21b extending in the front-rear direction is formed on the surface of the slider 21. A part of the projecting portion 33a and the connecting portion 33c (the portion extending in the front-rear direction) is slidably engaged with the guide groove 21b. As a result, the engaging member 33 can move in the front-rear direction along the guide groove 21b. The rest of the engaging portion 33b and the connecting portion 33c are arranged on the back side of the slider 21.

The engaging member 33 is urged rearward by the spring 34, that is, in the direction in which the protruding portion 33a protrudes from the slider 21. The spring 34 (corresponding to the urging member of the present invention) also functions as a member for urging the engaging member 33 in the direction in which the engaging portion 33b engages with the gear portion 32a.

In the fulcrum guide 16 shown in FIG. 3, torque is applied counterclockwise in FIG. 3 by the traveling of the thread Y at the time of winding the thread. The switching mechanism 30 prohibits the rotation of the fulcrum guide 16 during thread winding so that the fulcrum guide 16 does not rotate due to this torque. Specifically, as shown in FIG. 3a, when the engaging member 33 is urged rearward by the spring 34, the engaging portion 33b meshes with the gear portion 32a and the rotation of the fulcrum guide 16 is prohibited. Will be done.

When the fulcrum guide 16 moves from the winding position to the thread hooking position, the protrusion 33a of the engaging member 33 is pressed forward by the slider 21 adjacent to the rear. Then, the engaging member 33 moves forward, the engaging portion 33b is disengaged from the gear portion 32a, and the engagement between the engaging member 33 and the gear portion 32a is released. As a result, when the fulcrum guide 16 is located at the thread hooking position, the fulcrum guide 16 is in a freely rotatable state as shown in FIG. 3b. Therefore, when the thread Y is in contact with the outer peripheral circumference of the fulcrum guide 16 during the thread hooking work on the fulcrum guide 16, the fulcrum guide 16 can be easily rotated by the tension of the thread Y. Therefore, the position where the thread Y comes into contact with the fulcrum guide 16 at the time of the next thread winding can be changed from the position at the time of the previous thread winding, and the progress of local wear of the fulcrum guide 16 can be suppressed.

When the thread hooking work on the fulcrum guide 16 is completed and the fulcrum guide 16 is returned from the thread hooking position to the winding position, the slider 21 adjacent to the rear is separated. Then, the engaging member 33 moves rearward due to the urging force of the spring 34, the protruding portion 33a protrudes rearward from the slider 21, and the engaging portion 33b meshes with the gear portion 32a. When the fulcrum guide 16 returns to the winding position and the winding of the thread Y starts, a counterclockwise torque acts on the fulcrum guide 16 due to the traveling of the thread Y. However, since the rotation of the fulcrum guide 16 is blocked by the engaging member 33, the fulcrum guide 16 does not rotate.

In this embodiment, a part including the gear portion 32a and the engaging portion 33b of the engaging member 33 is provided on the back side of the slider 21, but these may be provided on the front side of the slider 21. .. Further, since the rearmost fulcrum guide 16 does not have a slider 21 adjacent to the rear, it is preferable to invert the arrangement of the engaging member 33 back and forth from that shown in FIG. In this case, the slider 21 adjacent to the front function as the disengagement member.

(Effect of the first embodiment)
The effect of this embodiment will be described. In this embodiment, the rotation of one or more fulcrum guides 16 configured to be freely rotatable is prohibited by the switching mechanism 30 at the time of spool winding. That is, since the fulcrum guide 16 does not rotate at high speed due to the running of the thread Y, it is possible to eliminate the need for the bearing of the fulcrum guide 16, and even if the bearing is provided, it is not exposed to high speed rotation for a long time. Since there is no such thing, early damage can be avoided. Therefore, it is possible to avoid an increase in cost due to bearing maintenance. Further, in this embodiment, the rotation prohibition of the fulcrum guide 16 is canceled by the switching mechanism 30 except at the time of winding the thread. Therefore, if the thread hooking work or the like is performed on the fulcrum guide 16 at that time, the thread Y becomes the fulcrum guide 16. The fulcrum guide 16 can be easily rotated by utilizing the tension of the thread Y when it comes into contact with the thread Y. Therefore, local wear of the fulcrum guide 16 can be reduced, and a drive unit such as a motor for rotating the fulcrum guide 16 becomes unnecessary. As described above, according to the present embodiment, the local wear of the fulcrum guide 16 can be reduced, and the cost for that can be reduced.

In this embodiment, the one or more fulcrum guides 16 include two fulcrum guides 16 at both ends in the axial direction. In a general thread winder 10, the closer to the end of a plurality of fulcrum guides 16 arranged in the axial direction of the bobbin holder 13, the larger the winding angle of the thread Y, and the larger the surface pressure received from the thread Y. , Wear tends to be a problem. Therefore, if at least two fulcrum guides 16 at both ends are configured to be freely rotatable, the problem of local wear of the fulcrum guides 16 can be largely solved.

In this embodiment, the one or more fulcrum guides 16 include all the fulcrum guides 16. This will ensure that local wear is reduced for all fulcrum guides 16.

In this embodiment, the switching mechanism 30 engages with the gear portion 32a formed on the holding member 32 holding the fulcrum guide 16 and the gear portion 32a at the time of winding the thread to prevent the rotation of the gear portion 32a. It has a 33 and an disengagement member (adjacent slider 21) that disengages the engagement member 33 from the gear portion 32a except when the thread is wound. According to such a configuration, the fulcrum guide 16 can be switched to a freely rotatable state by disengaging the engagement member 33 and the gear portion 32a by the disengagement member.

In this embodiment, a moving mechanism 20 for moving a plurality of fulcrum guides 16 between a winding position at the time of thread winding and a thread hooking position at the time of thread hooking work is provided, and an engagement disengagement member (adjacent slider 21) is provided. Maintains a state in which the engaging member 33 and the gear portion 32a are disengaged when the plurality of fulcrum guides 16 are located at the thread hooking positions. According to such a configuration, since the fulcrum guide 16 is in a state where it can freely rotate during the thread hooking work on the fulcrum guide 16, the fulcrum guide 16 can be rotated when the thread Y is hung on the fulcrum guide 16. can.

In this embodiment, the moving mechanism 20 has a plurality of sliders 21 that support a plurality of fulcrum guides 16, a guide rail 22 to which the plurality of sliders 21 are slidably attached, and a plurality of sliders along the guide rail 22. It has an air cylinder 23 for moving the 21. With such a moving mechanism 20, the fulcrum guide 16 can be moved by moving the slider 21 along the guide rail 22.

In this embodiment, when the plurality of fulcrum guides 16 move from the winding position to the thread hooking position, the sliders 21 adjacent to each other in the longitudinal direction (front-back direction) of the guide rail 22 come close to each other. According to such a configuration, when the plurality of fulcrum guides 16 are located at the thread hooking positions, the plurality of fulcrum guides 16 are gathered in close proximity to each other, so that the thread hooking work becomes easy.

In this embodiment, the engaging member 33 has a protruding portion 33a protruding from the slider 21 when the plurality of fulcrum guides 16 are located at the winding position, and the plurality of fulcrum guides 16 are threaded from the winding position. When moving to the hooking position, the adjacent slider 21 presses the protruding portion 33a as the disengagement member, so that the engagement between the engagement member 33 and the gear portion 32a is disengaged. According to such a configuration, since the adjacent slider 21 functions as the disengagement member, it is not necessary to newly provide the disengagement member, and the increase in the number of parts can be suppressed.

In this embodiment, a spring 34 is provided to urge the engaging member 33 in the direction in which the engaging member 33 engages with the gear portion 32a. If such a spring 34 is provided, the rotation of the fulcrum guide 16 can be reliably prevented by the engaging member 33 at the time of winding the spool.

(Second Example of Rotation Mechanism)
A second embodiment of the rotation mechanism will be described. The configuration common to the first embodiment will be omitted as appropriate, and the differences from the first embodiment will be mainly described. FIG. 5 is a diagram showing the operation of the switching mechanism 40 of the second embodiment. FIGS. A and b of FIG. 5 show a state in which the fulcrum guide 16 is moving from the winding position to the thread hooking position. FIG. 6 is a diagram showing the arrangement of the disengagement member 44 of the second embodiment.

The switching mechanism 40 of this embodiment has a gear portion 42a formed on a holding member 42 for holding each fulcrum guide 16, an engaging member 43 provided on each slider 21, and one fixed to a guide rail 22. It is configured to have and disengage member 44. In this embodiment, the gear portion 42a and the engaging member 43 are arranged on the back side (left side) of the slider 21, but these members may be arranged on the front side (right side) of the slider 21.

The fulcrum guide 16 and the holding member 32 have the same configuration as that of the first embodiment, and the fulcrum guide 16 can freely rotate around the central axis. The engaging member 43 is a member that prevents the gear portion 42a from rotating by engaging with the gear portion 42a, and is provided on each slider 21. The engaging member 43 is a long member, one end thereof is a pressed portion 43a, and the other end portion is an engaging portion 43b. The pressed portion 43a projects downward from the slider 21, and is pressed against the disengagement member 44 in the process of moving the fulcrum guide 16 from the winding position to the thread hooking position. The engaging portion 43b is a portion that meshes with the gear portion 42a to prevent the rotation of the gear portion 42a. A fulcrum 45 is arranged at the center of the engaging member 43, and the engaging member 43 is configured to be rotatable around the fulcrum 45. A spring 46 is connected to the engaging member 43, and the engaging portion 43b is urged in the direction of engaging with the gear portion 42a by the spring 46.

As shown in FIG. 6, the disengagement member 44 is fixed to the front end portion of the guide rail 22, and extends rearward from the front end portion of the guide rail 22. The rear end portion of the disengagement member 44 is a pressing portion 44a that presses the pressed portion 43a of each engaging member 43. The pressing portion 44a of the disengaging member 44 is arranged in front of the engaging member 43 when the plurality of fulcrum guides 16 are located at the winding positions. Further, the portion of the disengagement member 44 extending in the front-rear direction is arranged at a position slightly downward from the slider 21. Therefore, the disengagement member 44 does not come into contact with the slider 21, but can come into contact with the pressed portion 43a of the engagement member 43. The pressed portion 43a may protrude upward from the slider 21, and in this case, the portion extending in the front-rear direction of the disengagement member 44 is arranged above the slider 21.

When the fulcrum guide 16 is located at the winding position, the engaging portion 43b of the engaging member 43 is engaged with the gear portion 42a by the urging force of the spring 46. Even after the fulcrum guide 16 starts moving from the winding position to the thread hooking position, until the pressed portion 43a of the engaging member 43 comes into contact with the pressing portion 44a of the disengaging member 44, a in FIG. As shown in the figure, the engaging state is maintained between the engaging member 43 and the gear portion 42a. When the pressed portion 43a of the engaging member 43 comes into contact with the pressing portion 44a of the engaging member 44 while the fulcrum guide 16 is moving from the winding position to the thread hooking position, as shown in FIG. 5b. When the pressed portion 43a is pressed backward, the engaging member 43 rotates counterclockwise in FIG. 5 around the fulcrum 45. As a result, the engaging portion 43b of the engaging member 43 is disengaged from the gear portion 42a, and the fulcrum guide 16 is switched to a state in which it can freely rotate.

As shown in FIG. 6, when all the fulcrum guides 16 move to the thread hooking positions, all the engaging members 43 are in a state of being disengaged from the gear portion 42a, and the fulcrum guides 16 are in a state of being freely rotatable. Therefore, when the thread Y is in contact with the outer peripheral circumference of the fulcrum guide 16 during the thread hooking work on the fulcrum guide 16, the fulcrum guide 16 can be easily rotated by the tension of the thread Y. Therefore, the position where the thread Y comes into contact with the fulcrum guide 16 at the time of the next thread winding can be changed from the position at the time of the previous thread winding, and the progress of local wear of the fulcrum guide 16 can be suppressed.

When the thread hooking work on the fulcrum guide 16 is completed and the fulcrum guide 16 is returned from the thread hooking position to the winding position, the engaging member 43 of each slider 21 is separated from the disengaging member 44 in the process. Then, the engaging member 43 rotates clockwise due to the urging force of the spring 46, and the engaging portion 43b of the engaging member 43 meshes with the gear portion 42a. Therefore, even if the fulcrum guide 16 returns to the winding position and the winding of the thread Y starts, the fulcrum guide 16 does not rotate at high speed due to the traveling of the thread Y.

(Effect of the second embodiment)
The effect of this embodiment will be described, but the description of the effect of the configuration common to that of the first embodiment will be omitted. In this embodiment, the disengagement member 44 is fixed to the guide rail 22, and when the plurality of fulcrum guides 16 move from the winding position to the thread hooking position, the disengagement member 44 engages with the engagement member 43. By pressing, the engagement between the engaging member 43 and the gear portion 42a is released. According to such a configuration, since the disengagement member 44 can be provided in common to the plurality of fulcrum guides 16, it is not necessary to provide the disengagement member 44 for each fulcrum guide 16, and the disengagement member does not need to be provided. The number of 44 can be reduced. In this embodiment, only one disengagement member 44 is provided, but two or more disengagement members 44 may be provided. Further, it is not essential to fix the disengagement member 44 to the guide rail 22, and the disengagement member 44 is attached to a fixing member (for example, a support frame 14 or the like) to which the guide rail 22 is directly or indirectly fixed. It may be fixed.

(Other embodiments)
An example of modification in which various changes are made to the above embodiment will be described.

In the above embodiment, it is assumed that the gear portions 32a and 42a are formed on the outer peripheral surfaces of the holding members 32 and 42 that hold the fulcrum guide 16. However, a gear portion may be formed on the outer peripheral surface of the fulcrum guide 16.

In the above embodiment, when the plurality of fulcrum guides 16 move from the winding position to the thread hooking position, the fulcrum guides 16 are switched to a state in which the fulcrum guides 16 can freely rotate by the switching mechanisms 30 and 40. However, the fulcrum guide 16 may be switched to a state in which it can freely rotate other than when the fulcrum guide 16 is moved. For example, when the fulcrum guide 16 is located at the winding position and the thread Y is not wound, the fulcrum guide 16 may be switched to a state in which it can freely rotate. In this case, a drive unit such as a motor for driving the engagement members 33 and 43 in the above embodiment may be provided, and the fulcrum guide 16 may be switched to a state in which the fulcrum guide 16 can freely rotate by operating the drive unit. Further, when such a configuration is adopted, it is not essential to configure the plurality of fulcrum guides 16 to move between the winding position and the thread hooking position.

In the above embodiment, all the fulcrum guides 16 are switched to a state in which they can freely rotate except when the spool is wound by the switching mechanisms 30 and 40. However, the switching mechanisms 30 and 40 may switch only a part of the fulcrum guides 16 (for example, the fulcrum guides 16 at both ends) where local wear tends to be a problem so that they can freely rotate. In this case, the other fulcrum guide 16 does not need to be freely rotatable and may be fixed to the slider 21.

In the above embodiment, when the plurality of fulcrum guides 16 are located at the thread hooking positions, it is assumed that the plurality of fulcrum guides 16 are gathered at the front end portion of the guide rail 22 in a state of being close to each other. However, when the adjacent slider 21 is not made to function as the disengagement member, it is not essential that the plurality of fulcrum guides 16 are close to each other at the thread hooking position. That is, the present invention can be applied even when the plurality of fulcrum guides 16 move integrally between the winding position and the thread hooking position without changing the distance between them.

10: Thread winder 13: Bobbin holder (winding shaft)
16: Supporting point guide 20: Moving mechanism 21: Slider 22: Guide rail 23: Air cylinder (drive unit)
30, 40: Switching mechanism 32, 42: Holding member 32a, 42a: Gear portion 33, 43: Engaging member 33a: Protruding portion 34, 46: Spring (urging member)
44: Disengagement member B: Bobbin Y: Thread

Claims (10)

In a bobbin winder that winds up a plurality of threads while swinging a plurality of threads around a plurality of bobbins mounted on the take-up shaft with a plurality of fulcrum guides arranged in the axial direction of the take-up shaft as fulcrums.
The plurality of fulcrum guides have a roller shape having a central axis, and are configured such that the thread is hung on the outer peripheral surface thereof.
One or more of the plurality of fulcrum guides are configured to be freely rotatable around the central axis.
A bobbin winder characterized by being provided with a switching mechanism that prohibits the rotation of the one or more fulcrum guides during thread winding and cancels the rotation prohibition of the one or more fulcrum guides other than during thread winding. .. The thread winder according to claim 1, wherein the one or more fulcrum guides include two fulcrum guides at both ends in the axial direction. The thread winder according to claim 2, wherein the one or more fulcrum guides include all the fulcrum guides. The switching mechanism is
A gear portion formed on the fulcrum guide or a holding member that holds the fulcrum guide, and
An engaging member that engages with the gear portion during winding and prevents the rotation of the gear portion.
An disengagement member that disengages the engagement member from the gear portion other than when the spool is wound, and a disengagement member.
The thread winder according to any one of claims 1 to 3, wherein the bobbin winder is characterized by having. A moving mechanism for moving the plurality of fulcrum guides between the winding position during thread winding and the thread hooking position during thread hooking work is provided.
The disengagement member is characterized in that, when the plurality of fulcrum guides are located at the thread hook positions, the disengagement between the engagement member and the gear portion is maintained. 4. The thread winder according to 4. The movement mechanism is
A plurality of sliders supporting the plurality of fulcrum guides, and
A guide rail to which the plurality of sliders are slidably attached, and
A drive unit that moves the plurality of sliders along the guide rail,
The thread winder according to claim 5, wherein the bobbin winder is characterized by having. The thread winding according to claim 6, wherein when the plurality of fulcrum guides move from the winding position to the thread hooking position, the sliders adjacent to each other in the longitudinal direction of the guide rail are close to each other. Machine. The engaging member has a protrusion protruding from the slider when the plurality of fulcrum guides are located at the winding position.
When the plurality of fulcrum guides move from the winding position to the thread hooking position, the adjacent slider as the disengaging member presses the protruding portion, whereby the engaging member and the gear portion The thread winder according to claim 7, wherein the engagement of the thread winder is disengaged. The disengagement member is fixed to the guide rail or a fixing member to which the guide rail is directly or indirectly fixed.
When the plurality of fulcrum guides move from the winding position to the thread hooking position, the engaging member presses the engaging member, so that the engaging member and the gear portion are engaged with each other. The thread winder according to claim 6 or 7, characterized in that it is released. The spool according to any one of claims 4 to 9, wherein an urging member for urging the engaging member is provided in a direction in which the engaging member engages with the gear portion. Machine.

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