JP7705707B2 - Yarn Winding Machine - Google Patents

Description

The present invention relates to a yarn winding machine that winds multiple yarns around multiple bobbins attached to a winding shaft while traversing the multiple fulcrum guides aligned in the axial direction of the winding shaft.

Conventionally, there has been known a yarn winding machine that winds multiple yarns spun from a spinning device onto multiple bobbins attached to a winding shaft while traversing the yarn. In such a yarn winding machine, multiple fulcrum guides that serve as fulcrums for traversing the yarn are arranged in the axial direction of the winding shaft. For example, in Patent Documents 1 and 2, a roller-shaped fulcrum guide (a guide roller in Patent Document 2) having a central axis extending in a direction perpendicular to the axial direction of the winding shaft is provided, and the yarn is hung on the outer peripheral surface of the fulcrum guide. In Patent Document 1, the fulcrum guide is configured so as not to rotate around the central axis when the yarn is wound. In Patent Document 2, the fulcrum guide is a roller that can freely rotate around the central axis.

JP 2013-23787 A Special Publication No. 2008-531438

If the fulcrum guide does not rotate during yarn winding as in Patent Document 1, the yarn traveling at high speed continues to contact the same part of the outer peripheral surface of the fulcrum guide, which tends to cause localized wear of the fulcrum guide. As a result, the contact state between the yarn and the fulcrum guide changes, which may lead to a deterioration in yarn quality. In this regard, Patent Document 1 is configured so that the fulcrum guide can be rotated by a motor, making it possible to change the contact position with the yarn. However, there is a problem in that costs are high because a drive unit such as a motor is required to rotate the fulcrum guide.

On the other hand, the fulcrum guide in Patent Document 2 is configured to be freely rotatable, so that the fulcrum guide rotates constantly due to friction with the yarn during winding, which reduces localized wear. However, because the fulcrum guide is exposed to high-speed rotation, the bearings of the fulcrum guide are prone to early damage. This has led to an issue of increased costs associated with bearing maintenance.

In view of the above problems, the present invention aims to provide a yarn winding machine that can reduce local wear on the fulcrum guide and reduce the costs involved.

The present invention is a yarn winding machine that winds multiple yarns around multiple bobbins attached to a winding shaft while traversing the multiple fulcrum guides aligned in the axial direction of the winding shaft. The multiple fulcrum guides are roller-shaped with a central axis and are configured so that the yarns are hung on their outer circumferential surface. One or more of the multiple fulcrum guides are configured to be freely rotatable around the central axis, and a switching mechanism is provided that prohibits the rotation of the one or more fulcrum guides when winding yarn and releases the prohibition on the rotation of the one or more fulcrum guides when not winding yarn.

According to the present invention, the rotation of one or more fulcrum guides configured to be freely rotatable is prohibited by the switching mechanism during thread 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 a bearing for the fulcrum guide, and even if a bearing is provided, it is not exposed to high-speed rotation for a long period of time, so early damage can be avoided. Therefore, the increase in costs associated with the maintenance of the bearings can be avoided. In addition, in the present invention, the prohibition on the rotation of the fulcrum guide is released by the switching mechanism except when threading the fulcrum guide, so that if threading work is performed on the fulcrum guide at that time, the fulcrum guide can be easily rotated by utilizing the tension of the thread when the thread contacts the fulcrum guide. Therefore, local wear of the fulcrum guide can be reduced, and a drive unit such as a motor for rotating the fulcrum guide is not required. As described above, according to the present invention, local wear of the fulcrum guide can be reduced, and the cost for doing so can be reduced. In addition, since it is not essential to rotate a fulcrum guide in which local wear is not a big problem, 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 typical yarn winding machine, among the multiple fulcrum guides arranged in the axial direction of the winding shaft, the closer to the end the guide is, the greater the surface pressure it receives from the yarn due to the larger winding angle of the yarn, making it more likely that wear will become a problem. Therefore, if at least the two fulcrum guides at both ends are configured to be freely rotatable, the problem of localized wear of the fulcrum guides can be largely eliminated.

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

This ensures that localized wear is reduced on all fulcrum guides.

In the present invention, the switching mechanism may include a gear portion formed on the fulcrum guide or a holding member that holds the fulcrum guide, an engagement member that engages with the gear portion during line winding to prevent rotation of the gear portion, and a disengagement member that disengages the engagement member from the gear portion at times other than when line winding is being performed.

With this configuration, the fulcrum guide can be switched to a freely rotatable state by disengaging the engagement member from the gear portion using the disengagement member.

In the present invention, a moving mechanism is provided that moves the plurality of fulcrum guides between a winding position during thread winding and a threading position during threading, and the disengaging member maintains a disengaged state between the engaging member and the gear portion when the plurality of fulcrum guides are positioned at the threading position.

With this configuration, the fulcrum guide is free to rotate when the thread is being threaded onto the fulcrum guide, so the fulcrum guide can be rotated when the thread is being threaded onto the fulcrum guide.

In the present invention, the movement mechanism may include a plurality of sliders that support the plurality of fulcrum guides, 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.

With this type of 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 threading position, the sliders adjacent to each other in the longitudinal direction of the guide rail may approach each other.

With this configuration, when the multiple fulcrum guides are positioned at the threading position, they are gathered in close proximity to each other, making threading easier.

In the present invention, the engaging member has a protruding portion that protrudes from the slider when the plurality of fulcrum guides are located at the winding position, and when the plurality of fulcrum guides move from the winding position to the threading position, the adjacent slider acts as the disengaging member to press the protruding portion, thereby disengaging the engaging member from the gear portion.

With this configuration, the adjacent slider functions as a disengagement member, so there is no need to provide a new disengagement member, and an increase in the number of parts can be suppressed.

In the present invention, the disengaging member is fixed to the guide rail or to a fixed member to which the guide rail is directly or indirectly fixed, and when the plurality of fulcrum guides move from the winding position to the threading position, the disengaging member presses the engaging member, thereby disengaging the engaging member from the gear portion.

With this configuration, a common disengagement member can be provided for multiple fulcrum guides, eliminating the need to provide a separate disengagement member for each fulcrum guide, and reducing the number of disengagement members.

In the present invention, it is preferable that a biasing member is provided to bias the engaging member in a direction in which the engaging member engages with the gear portion.

By providing such a biasing member, the engagement member can reliably prevent the fulcrum guide from rotating when winding the line.

FIG. 2 is a side view of the spinning take-up device according to the embodiment. FIG. 5A to 5C are diagrams illustrating the operation of the switching mechanism of the first embodiment. FIG. 2 is a cross-sectional view showing the switching mechanism of the first embodiment. 13A to 13C are diagrams illustrating the operation of the switching mechanism of the second embodiment. 13A and 13B are diagrams showing the arrangement of the disengaging member in the second embodiment.

Below, we will explain an embodiment in which the yarn winding machine of the present invention is applied to a yarn take-up device, with reference to the drawings.

(Yarn take-up device)
Fig. 1 is a side view of a spinning take-off device according to the present embodiment. In this specification, the front, rear, left, right, top and bottom directions shown in Fig. 1 are defined as front, rear, left, right, top and bottom directions of the spinning take-off device.

The yarn take-up device 1 is a device that takes up multiple (16 in this embodiment) yarns Y spun from the spinning device 2, and is equipped with godet rollers 3 and 4 and a yarn winding machine 10. The spinning device 2 is disposed above the yarn take-up device 1, and spins multiple yarns Y made of synthetic resin. The godet rollers 3 and 4 are disposed below the spinning device 2, and are driven to rotate by a motor (not shown). The multiple yarns Y spun from the spinning device 2 are sent to the yarn winding machine 10 via the godet rollers 3 and 4.

The yarn winding machine 10 is disposed below the godet rollers 3 and 4. The yarn winding machine 10 has two bobbin holders 13 (corresponding to the winding shaft of the present invention) supported at one end by a turret 12 built into the machine base 11. The bobbin holders 13 extend in the front-rear direction (corresponding to the axial direction of the present invention), and their rear ends are supported by the turrets 12. A number of bobbins B can be attached to the bobbin holders 13 in the front-rear direction. The bobbin holders 13 are driven to rotate around their axes by a motor (not shown).

The turret 12 is a disk-shaped member with a rotation axis parallel to the front-rear direction, and has bobbin holders 13 attached to an upper position and a lower position that are 180 degrees apart in the circumferential direction. By rotating the turret 12, the two bobbin holders 13 move between the upper and lower positions. In the upper position, the bobbin holder 13 winds multiple yarns Y onto multiple bobbins B to form multiple packages P. Meanwhile, in the lower position, the bobbin holder 13 collects the multiple packages P and installs multiple new bobbins B.

The yarn winding machine 10 has a support frame 14 that is supported at one end 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 disposed above the support frame 14. The guide unit 15 has fulcrum guides 16 arranged in the front-rear direction, the same number as the number of yarns Y (16 in this embodiment). The support frame 14 has traverse devices 17 arranged in the front-rear direction, the same number as the number of yarns Y. The traverse devices 17 traverse the yarns Y in the front-rear direction, using the corresponding fulcrum guides 16 as fulcrums.

A contact roller 18 is disposed below the support frame 14 and is rotatably supported by the support frame 14. The contact roller 18 comes into contact with the outer circumferential surfaces of the multiple packages P held by the bobbin holder 13 in the upper position. During yarn winding, the contact roller 18 rotates while applying a predetermined contact pressure to the packages P, thereby adjusting the shape of the packages P.

(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 the multiple fulcrum guides 16 are located at the winding position, and Fig. 2b shows a state in which the multiple fulcrum guides 16 are located at the threading position. The winding position is the position of the multiple fulcrum guides 16 when multiple yarns Y are wound around multiple bobbins B. The threading position is the position of the multiple fulcrum guides 16 when multiple yarns Y are hung on the multiple fulcrum guides 16. The multiple fulcrum guides 16 are configured to be movable between the winding position and the threading position by a moving mechanism 20.

The guide unit 15 is configured to have multiple fulcrum guides 16 and a movement mechanism 20. The movement mechanism 20 has multiple sliders 21, guide rails 22, and air cylinders 23 (corresponding to the drive unit of the present invention). The sliders 21 are provided in the same number as the fulcrum guides 16, and support the fulcrum guides 16 rotatably.

The fulcrum guide 16 protrudes to the right from the slider 21 (see FIG. 5) and is a roller-shaped member having a central axis that extends in a direction perpendicular to the axial direction of the bobbin holder 13 (left-right direction). The yarn Y is hung on the outer circumferential surface of the fulcrum guide 16, and during yarn winding, the yarn Y runs in contact with the outer circumferential surface of the fulcrum guide 16. All of the fulcrum guides 16 are configured to be freely rotatable around their central axes.

The guide rail 22 is a member that extends 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 attached to the guide rail 22 so that they can slide in a line 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). The rearmost slider 21 is connected to the rod 23a of the air cylinder 23.

As shown in Figure 2a, when the rod 23a of the air cylinder 23 is retracted, the multiple sliders 21 are spaced apart from each other and lined up in the front-rear direction. In other words, the multiple fulcrum guides 16 are also spaced apart from each other and lined up in the front-rear direction. The positions of the multiple fulcrum guides 16 at this time are the winding positions. When the multiple fulcrum guides 16 are in the winding positions, the points of contact between the yarn Y and each fulcrum guide 16, i.e., the traverse fulcrums of the yarn Y, are equally spaced.

The yarn paths of the multiple yarns Y distributed from the godet roller 4 to the multiple fulcrum guides 16 located at the winding position are symmetrical in the front-to-rear direction with respect to a vertical plane passing through the centers of the multiple fulcrum guides 16. The eight yarns Y in the front half are hung on the front side of the fulcrum guides 16, while the eight yarns Y in the rear half are hung on the rear side of the fulcrum guides 16. In addition, the winding angle of the yarn Y is larger for the multiple fulcrum guides 16 closer to the ends, and as a result, the surface pressure of the yarn Y is larger, making them more susceptible to wear.

When threading the multiple fulcrum guides 16, the air cylinder 23 is driven to extend the rod 23a. This causes the rearmost slider 21 connected to the rod 23a to move forward. The rearmost slider 21 then abuts against the slider 21 in front of it and presses it forward, and similarly each slider 21 abuts against the slider 21 in front of it and presses it forward, and this action is repeated. Note that "abutting" here includes not only a case where the sliders 21 are in direct contact with each other, but also a case where the sliders 21 are in indirect contact with each other via another member.

When the frontmost slider 21 abuts against a stopper (not shown) provided at the front end of the guide rail 22, the air cylinder 23 stops. As a result, all sliders 21 gather close to each other at the front end of the guide rail 22. The position of the multiple fulcrum guides 16 at this time is the threading position. Since the multiple fulcrum guides 16 located at the threading position gather close to each other at the front end of the guide rail 22, it is easy to thread the multiple fulcrum guides 16. Note that instead of the stopper as described above, the front end 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 abut against the stopper and stop.

After the threading operation is completed, the air cylinder 23 is driven to retract the rod 23a, causing the rearmost slider 21 to move backward. When the belt connecting the rearmost slider 21 to the slider 21 in front of it is fully extended, the slider 21 in front of it is pulled backward. Thereafter, each slider 21 is pulled backward in the same manner, causing the multiple fulcrum guides 16 to return to the winding position shown in Figure 2a. Note that 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 embodiment of the rotation mechanism)
A 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 threading position. The fulcrum guide 16 shown in Fig. 3 is the frontmost fulcrum guide 16.

In this embodiment, a switching device 31 is provided on each slider 21, and the assembly of the switching devices 31 provided on each slider 21 constitutes the switching mechanism 30. The switching device 31 is composed of a gear portion 32a formed on a 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.

As shown in FIG. 4, the fulcrum guide 16 is fixed to the holding member 32 and can rotate together 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 the rear side (left side) of the holding member 32 from the surface of the slider 21. The frictional force between the holding member 32 and the slider 21 is set to a small value that allows the holding member 32 to rotate freely around the central axis of the fulcrum guide 16. This allows the fulcrum guide 16 to rotate freely 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 engages with the gear portion 32a to prevent the gear portion 32a from rotating. The engaging member 33 is a member in which the protruding portion 33a, the engaging portion 33b, and the 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 gear portion 32a from rotating. The connecting portion 33c is a portion that connects the protruding portion 33a and the engaging portion 33b. Note that it is not essential that the protruding portion 33a protrudes rearward, and it may protrude in another direction as long as it is in a position where it is pressed by the adjacent slider 21.

A guide groove 21b extending in the front-rear direction is formed on the surface of the slider 21. The protrusion 33a and a part of the connection part 33c (the part extending in the front-rear direction) are slidably engaged with the guide groove 21b. This allows the engagement member 33 to move in the front-rear direction along the guide groove 21b. The remaining parts of the engagement part 33b and the connection part 33c are disposed on the back side of the slider 21.

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

When the yarn Y is wound, a torque is applied to the fulcrum guide 16 shown in FIG. 3 in the counterclockwise direction in FIG. 3 due to the movement of the yarn Y. To prevent the fulcrum guide 16 from rotating due to this torque, the switching mechanism 30 prohibits the rotation of the fulcrum guide 16 during yarn winding. Specifically, as shown in FIG. 3A, the engaging member 33 is biased backward by the spring 34, so that the engaging portion 33b meshes with the gear portion 32a, and the rotation of the fulcrum guide 16 is prohibited.

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

When the threading operation on the fulcrum guide 16 is completed and the fulcrum guide 16 is returned from the threading position to the winding position, the adjacent slider 21 moves away. Then, the engaging member 33 moves rearward due to the biasing 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 winding of the yarn Y begins, a counterclockwise torque acts on the fulcrum guide 16 due to the running of the yarn Y. However, because the engaging member 33 prevents the fulcrum guide 16 from rotating, the fulcrum guide 16 does not rotate.

In this embodiment, the gear portion 32a and a part including the engaging portion 33b of the engaging member 33 are provided on the back side of the slider 21, but they may be provided on the front side of the slider 21. In addition, for the rearmost fulcrum guide 16, since there is no adjacent slider 21 to the rear, it is preferable to reverse the arrangement of the engaging member 33 from that shown in FIG. 3. In this case, the adjacent slider 21 to the front functions as the disengaging member.

(Effects of the First Embodiment)
The effect of this embodiment will be described. In this embodiment, the rotation of one or more fulcrum guides 16 that are configured to be freely rotatable is prohibited by the switching mechanism 30 during yarn winding. In other words, since the fulcrum guide 16 does not rotate at high speed due to the running of the yarn Y, it is possible to eliminate the need for a bearing for the fulcrum guide 16, and even if a bearing is provided, it is not exposed to high-speed rotation for a long period of time, so early damage can be avoided. Therefore, it is possible to avoid an increase in cost associated with the maintenance of the bearing. In addition, in this embodiment, the prohibition of rotation of the fulcrum guide 16 is released by the switching mechanism 30 except when the yarn is wound, so that if a threading operation or the like is performed on the fulcrum guide 16 at that time, the fulcrum guide 16 can be easily rotated by utilizing the tension of the yarn Y when the yarn Y contacts the fulcrum guide 16. 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 is not required. As described above, according to this embodiment, it is possible to reduce local wear of the fulcrum guide 16 and reduce the cost for doing so.

In this embodiment, the one or more fulcrum guides 16 include two fulcrum guides 16 at both ends in the axial direction. In a typical yarn winding machine 10, the closer to the end of the multiple fulcrum guides 16 arranged in the axial direction of the bobbin holder 13, the greater the winding angle of the yarn Y becomes, and the greater the surface pressure received from the yarn Y becomes, making wear more likely to become a problem. Therefore, if at least the 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 eliminated.

In this embodiment, the one or more fulcrum guides 16 include all of the fulcrum guides 16. In this way, it is possible to reliably reduce local wear for all of the fulcrum guides 16.

In this embodiment, the switching mechanism 30 has a gear portion 32a formed on a holding member 32 that holds the fulcrum guide 16, an engagement member 33 that engages with the gear portion 32a during line winding to prevent rotation of the gear portion 32a, and a disengagement member (adjacent slider 21) that disengages the engagement member 33 from the gear portion 32a when not winding the line. With this configuration, the fulcrum guide 16 can be switched to a freely rotatable state by disengaging the engagement member 33 from the gear portion 32a with the disengagement member.

In this embodiment, a moving mechanism 20 is provided that moves the multiple fulcrum guides 16 between a winding position during thread winding and a threading position during threading, and the disengagement member (the adjacent slider 21) maintains the disengagement between the engagement member 33 and the gear portion 32a when the multiple fulcrum guides 16 are located at the threading position. With this configuration, the fulcrum guide 16 is in a freely rotatable state during threading, so that the fulcrum guide 16 can be rotated when threading the thread Y on the fulcrum guide 16.

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 an air cylinder 23 that moves the plurality of sliders 21 along the guide rail 22. With such a moving mechanism 20, the fulcrum guide 16 can be moved by moving the sliders 21 along the guide rail 22.

In this embodiment, when the multiple fulcrum guides 16 move from the winding position to the threading position, the sliders 21 adjacent to each other in the longitudinal direction (front-rear direction) of the guide rail 22 approach each other. With this configuration, when the multiple fulcrum guides 16 are located at the threading position, the multiple fulcrum guides 16 are gathered in close proximity to each other, making threading easier.

In this embodiment, the engaging member 33 has a protruding portion 33a that protrudes from the slider 21 when the multiple fulcrum guides 16 are located at the winding position, and when the multiple fulcrum guides 16 move from the winding position to the threading position, the adjacent slider 21 acts as a disengaging member and presses the protruding portion 33a, thereby disengaging the engaging member 33 from the gear portion 32a. With this configuration, the adjacent slider 21 functions as a disengaging member, so there is no need to provide a new disengaging member, and an increase in the number of parts can be suppressed.

In this embodiment, a spring 34 is provided to bias the engaging member 33 in the direction in which the engaging member 33 engages with the gear portion 32a. By providing such a spring 34, the engaging member 33 can reliably prevent the fulcrum guide 16 from rotating during line winding.

(Second embodiment of the rotation mechanism)
A second embodiment of the rotation mechanism will be described. Explanation of the configuration common to the first embodiment will be omitted as appropriate, and 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. 5a and 5b both show the state in which the fulcrum guide 16 is in the middle of moving from the winding position to the threading 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 is composed of a gear portion 42a formed on a holding member 42 that holds each fulcrum guide 16, an engaging member 43 provided on each slider 21, and one disengaging member 44 fixed to the guide rail 22. In this embodiment, the gear portion 42a and the engaging member 43 are disposed on the back side (left side) of the slider 21, but these members may also be disposed on the front side (right side) of the slider 21.

The fulcrum guide 16 and the holding member 32 are configured in the same manner as in the first embodiment, and the fulcrum guide 16 can freely rotate around the central axis. The engaging member 43 is a member that engages with the gear portion 42a to prevent the rotation of the gear portion 42a, and is provided on each slider 21. The engaging member 43 is a long member, one end of which is the pressed portion 43a, and the other end is the engaging portion 43b. The pressed portion 43a protrudes downward from the slider 21, and is pressed by the disengaging member 44 in the process of the fulcrum guide 16 moving from the winding position to the threading 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 disposed in 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 engagement member 43, and the spring 46 biases the engagement portion 43b in a direction in which it engages with the gear portion 42a.

As shown in FIG. 6, the disengagement member 44 is fixed to the front end of the guide rail 22 and extends rearward from the front end of the guide rail 22. The rear end of the disengagement member 44 is a pressing portion 44a that presses the pressed portion 43a of each engagement member 43. The pressing portion 44a of the disengagement member 44 is disposed forward of the engagement members 43 when the plurality of fulcrum guides 16 are located at the winding position. In addition, the portion extending in the front-rear direction of the disengagement member 44 is disposed at a position slightly downwardly away 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. In this case, the portion extending in the front-rear direction of the disengagement member 44 is disposed above the slider 21.

When the fulcrum guide 16 is in the winding position, the engaging portion 43b of the engaging member 43 is engaged with the gear portion 42a by the biasing force of the spring 46. Even after the fulcrum guide 16 starts moving from the winding position to the threading position, the engagement state between the engaging member 43 and the gear portion 42a is maintained as shown in FIG. 5A until the pressed portion 43a of the engaging member 43 comes into contact with the pressing portion 44a of the disengaging member 44. When the pressed portion 43a of the engaging member 43 comes into contact with the pressing portion 44a of the disengaging member 44 while the fulcrum guide 16 is moving from the winding position to the threading position, as shown in FIG. 5B, the pressed portion 43a is pressed backward, causing the engaging member 43 to rotate 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 freely rotatable state.

As shown in FIG. 6, when all the fulcrum guides 16 have moved to the threading position, all the engagement members 43 are disengaged from the gear portion 42a, and the fulcrum guides 16 are free to rotate. Therefore, when threading the fulcrum guides 16, the thread Y comes into contact with the outer circumference of the fulcrum guides 16, and the tension of the thread Y makes it easy to rotate the fulcrum guides 16. Therefore, the position at which the thread Y comes into contact with the fulcrum guides 16 during the next thread winding can be changed from the position at which the thread was previously wound, and local wear of the fulcrum guides 16 can be suppressed.

When the threading operation on the fulcrum guide 16 is completed and the fulcrum guide 16 is returned from the threading position to the winding position, the engaging member 43 of each slider 21 moves away from the disengaging member 44 during the process. Then, the engaging member 43 rotates clockwise due to the biasing 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 winding of the yarn Y begins, the fulcrum guide 16 does not rotate at high speed due to the running of the yarn Y.

(Effects of the Second Example)
The effects of this embodiment will be described, but the effects of the configuration common to the first embodiment will not be described. 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 threading position, the disengagement member 44 presses the engagement member 43, thereby disengaging the engagement member 43 from the gear portion 42a. With this configuration, the disengagement member 44 can be provided in common for the plurality of fulcrum guides 16, so that it is not necessary to provide the disengagement member 44 for each fulcrum guide 16, and the number of disengagement members 44 can be reduced. In this embodiment, only one disengagement member 44 is provided, but two or more disengagement members 44 may be provided. In addition, it is not essential to fix the disengagement member 44 to the guide rail 22, and the disengagement member 44 may be fixed to a fixed member (e.g., the support frame 14, etc.) to which the guide rail 22 is directly or indirectly fixed.

Other Embodiments
A description will now be given of modifications to the above embodiment, in which various changes have been made.

In the above embodiment, the gear portions 32a, 42a are formed on the outer peripheral surface of the holding members 32, 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 multiple fulcrum guides 16 move from the winding position to the threading position, the switching mechanisms 30 and 40 switch the fulcrum guides 16 to a freely rotatable state. However, the fulcrum guides 16 may be switched to a freely rotatable state at any time other than when the fulcrum guides 16 move. For example, the fulcrum guides 16 may be switched to a freely rotatable state when the fulcrum guides 16 are located at the winding position and the yarn Y is not being wound. In this case, a drive unit such as a motor that drives the engagement members 33 and 43 in the above embodiment may be provided, and the fulcrum guides 16 may be switched to a freely rotatable state by operating this drive unit. In addition, when such a configuration is adopted, it is not essential to configure the multiple fulcrum guides 16 to move between the winding position and the threading position.

In the above embodiment, the switching mechanisms 30, 40 are used to switch all fulcrum guides 16 to a freely rotatable state except when the line is being wound. However, the switching mechanisms 30, 40 may be used to switch only some of the fulcrum guides 16 (e.g., the fulcrum guides 16 at both ends) where local wear is likely to be an issue to a freely rotatable state. In this case, the other fulcrum guides 16 do not need to be freely rotatable and may be fixed to the slider 21.

In the above embodiment, when the multiple fulcrum guides 16 are located at the threading position, the multiple fulcrum guides 16 are gathered at the front end of the guide rail 22 in a state close to each other. However, if the adjacent slider 21 is not made to function as a disengagement member, it is not essential that the multiple fulcrum guides 16 are close to each other at the threading position. In other words, the present invention is also applicable when the multiple fulcrum guides 16 move integrally between the winding position and the threading position without changing the distance between them.

10: Yarn winding machine 13: Bobbin holder (winding shaft)
16: Fulcrum guide 20: Moving mechanism 21: Slider 22: Guide rail 23: Air cylinder (driving part)
30, 40: Switching mechanism 32, 42: Holding member 32a, 42a: Gear portion 33, 43: Engagement member 33a: Protrusion 34, 46: Spring (biasing member)
44: disengagement member B: bobbin Y: thread

Claims (10)

A yarn winding machine in which a plurality of yarns are wound around a plurality of bobbins attached to a winding shaft while traversing the plurality of yarns with a plurality of fulcrum guides arranged in an axial direction of the winding shaft as fulcrums,
The plurality of fulcrum guides are roller-shaped having a central axis, and are configured so that the yarn is hung on an outer circumferential surface thereof,
One or more of the plurality of fulcrum guides are configured to be freely rotatable around the central axis,
a switching mechanism is provided that prohibits rotation of the one or more fulcrum guides during yarn winding and releases the prohibition of rotation of the one or more fulcrum guides during times other than yarn winding ;
The yarn winding machine , wherein the one or more fulcrum guides are allowed to rotate freely when the rotation inhibition is released by the switching mechanism . The yarn winding machine according to claim 1, characterized in that the one or more fulcrum guides include two fulcrum guides at both ends in the axial direction. The yarn winding machine according to claim 2, characterized in that the one or more fulcrum guides include all of the fulcrum guides. The switching mechanism includes:
a gear portion formed on the fulcrum guide or a holding member that holds the fulcrum guide;
an engagement member that engages with the gear portion during fishing line winding to prevent rotation of the gear portion;
a disengagement member that disengages the engagement member from the gear portion except when the fishing line is being wound;
The yarn winding machine according to any one of claims 1 to 3, further comprising: a moving mechanism for moving the plurality of fulcrum guides between a winding position during yarn winding and a threading position during a threading operation,
The yarn winding machine according to claim 4 , wherein the disengaging member maintains a state in which the engaging member and the gear portion are disengaged from each other when the plurality of fulcrum guides are located at the yarn hooking position. The moving mechanism includes:
A plurality of sliders supporting the plurality of fulcrum guides;
a guide rail to which the plurality of sliders are slidably attached;
a drive unit that moves the plurality of sliders along the guide rail;
The yarn winding machine according to claim 5, further comprising: The yarn winding machine according to claim 6, characterized in that when the plurality of fulcrum guides move from the winding position to the yarn hooking position, the sliders adjacent to each other in the longitudinal direction of the guide rail approach each other. the engaging member has a protruding portion protruding from the slider when the plurality of fulcrum guides are located at the winding position,
The yarn winding machine according to claim 7, characterized in that, when the plurality of fulcrum guides move from the winding position to the yarn hooking position, the adjacent slider acting as the disengagement member presses the protrusion, thereby disengaging the engagement member from the gear portion. The disengagement member is fixed to the guide rail or to a fixing member to which the guide rail is directly or indirectly fixed,
The yarn winding machine according to claim 6 or 7, characterized in that when the plurality of fulcrum guides move from the winding position to the yarn hooking position, the disengaging member presses the engaging member, thereby releasing the engagement between the engaging member and the gear portion. The yarn winding machine according to any one of claims 4 to 9, characterized in that a biasing member is provided to bias the engaging member in a direction in which the engaging member engages with the gear portion.

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