Yarn winder

Abstract

To restrain a fulcrum guide from receiving a large force from a yarn, at the time of yarn hooking.SOLUTION: A yarn winder 10 includes a second guide unit 15b which includes: a cylindrical fulcrum guide 16; and a yarn depositing guide 31 where a yarn Y hooked on the fulcrum guide 16 is deposited so as not to come into contact with the fulcrum guide 16, when hooking the yarn Y on the fulcrum guide 16 in a state of the yarn being sucked and held by a suction gun 60.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a yarn winding machine including a guide unit having a fulcrum guide that serves as a fulcrum when a yarn is wound around a bobbin while being traversed. [Background technology]

[0002] Conventionally, there has been known a yarn winding machine that winds a yarn spun from a spinning device onto a bobbin while traversing the yarn. Such a yarn winding machine is provided with a plurality of fulcrum guides that serve as fulcrums for traversing the yarn. For example, in Patent Documents 1 and 2, a cylindrical fulcrum guide (a guide roller in Patent Document 2) is provided, and the yarn is hung on the outer peripheral surface of the fulcrum guide.

[0003] As for the fulcrum guide, for example, as disclosed in Patent Document 1, there is a fixed type fulcrum guide that is configured not to rotate around the central axis during line winding. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2013-23787 A Summary of the Invention [Problem to be solved by the invention]

[0005] The threading of the yarn on the fulcrum guide as described above is performed, for example, by an operator operating a suction-holding member (e.g., a suction gun) that suction-holds the yarn. When the yarn is suction-held by the suction-holding member, the tension of the yarn is greater than that during winding of the yarn. When threading the yarn on multiple fulcrum guides provided in the yarn winding machine, the yarn is hung in a greatly bent state on the fulcrum guide that is located at a position away from the place where the operator operates the suction-holding member. When the yarn, which has been suction-held by the suction-holding member and therefore has a large tension, is hung on the fulcrum guide, if the yarn comes into contact with the fulcrum guide in a greatly bent state, the yarn is pressed strongly against the fulcrum guide, and the fulcrum guide receives a large force from the yarn. This causes the following problems.

[0006] For example, in the case of a fixed fulcrum guide as disclosed in the above-mentioned Patent Document 1, the fulcrum guide is easily worn out because the yarn runs while being strongly pressed against the fulcrum guide.

[0007] In view of the above problems, an object of the present invention is to provide a yarn winding machine capable of preventing a fulcrum guide from receiving a large force from the yarn during threading. [Means for solving the problem]

[0008] The yarn winding machine of the present invention is a yarn winding machine that winds multiple yarns onto multiple bobbins attached to a bobbin holder, and is equipped with a guide unit having a cylindrical fulcrum guide that serves as a fulcrum when the yarn is wound onto the bobbin while traversing, and a yarn deposit guide into which the yarn hung on the fulcrum guide is deposited while coming into contact with the fulcrum guide when the yarn is hung on the fulcrum guide while the yarn is held by a suction and holding member that suctions and holds the yarn, and is characterized in that the yarn deposit guide is positioned so as to satisfy the following formula (1). θ1<θ2 (1) θ1: the bending angle between a first vector having a starting point at the center of the fulcrum guide and an ending point at a contact point between the yarn and the fulcrum guide on the upstream side of the yarn running direction on the outer circumferential surface of the fulcrum guide, and a second vector having a starting point at the center of the fulcrum guide and an ending point at a contact point between the yarn and the fulcrum guide on the downstream side of the yarn running direction on the outer circumferential surface of the fulcrum guide, when viewed from the axial direction of the fulcrum guide, when the yarn is deposited in the yarn deposit guide during threading of the yarn on the fulcrum guide. θ2: a virtual bending angle formed by a virtual first vector having a starting point at the center of the fulcrum guide and an ending point at a contact point between the yarn and the fulcrum guide on the upstream side of the yarn running direction on the outer circumferential surface of the fulcrum guide, and a virtual second vector having a starting point at the center of the fulcrum guide and an ending point at a contact point between the yarn and the fulcrum guide on the downstream side of the yarn running direction on the outer circumferential surface of the fulcrum guide, when viewed from the axial direction of the fulcrum guide, assuming that the yarn is directly hung on the fulcrum guide without being laid on the yarn laying guide when the yarn is laid on the fulcrum guide

[0009] In a state where the suction and holding member is used to hold the yarn on the fulcrum guide, the tension of the yarn is greater than that during winding. When the yarn with such a high tension is hung on the fulcrum guide, if the yarn comes into contact with the fulcrum guide in a greatly bent state, the yarn is pressed strongly against the fulcrum guide, and the fulcrum guide receives a large force from the yarn. According to the present invention, the bending angle θ1 of the yarn with respect to the fulcrum guide when the yarn is placed on the yarn deposit guide during threading can be made smaller than the virtual bending angle θ2 of the yarn with respect to the fulcrum guide when the yarn is directly hung on the fulcrum guide. In other words, by depositing the yarn on the yarn deposit guide during threading, it is possible to prevent the yarn from coming into contact with the fulcrum guide in a greatly bent state. This makes it possible to prevent the fulcrum guide from receiving a large force from the yarn during threading.

[0010] Alternatively, the yarn winding machine of the present invention is a yarn winding machine that winds multiple yarns onto multiple bobbins attached to a bobbin holder, and is characterized in that it comprises a guide unit having a cylindrical fulcrum guide that serves as a fulcrum when the yarn is wound onto the bobbin while traversing it, and a yarn deposit guide that deposits the yarn so that the yarn to be hung on the fulcrum guide does not come into contact with the fulcrum guide when the yarn is hung on the fulcrum guide while the yarn is being sucked and held by a suction holding member that sucks and holds the yarn.

[0011] When the suction and holding member is used to suck and hold the yarn in order to thread the yarn on the fulcrum guide, the tension in the yarn is greater than when the yarn is being wound. When threading the yarn with such a high tension on the fulcrum guide, if the yarn comes into contact with the fulcrum guide in a significantly bent state, the yarn is pressed strongly against the fulcrum guide, and the fulcrum guide receives a large force from the yarn. According to the present invention, by depositing the yarn in the yarn deposit guide during threading, it is possible to prevent the fulcrum guide and the yarn from coming into contact. This makes it possible to prevent the fulcrum guide from receiving a large force from the yarn during threading.

[0012] In the yarn winding machine of the present invention, it is preferable that the yarn winding machine is provided with an inhibition section that is positioned below the fulcrum guide and between the suction holding member and the yarn deposit guide when the yarn is threaded onto the fulcrum guide, and that inhibits the yarn deposited in the yarn deposit guide from contacting the fulcrum guide.

[0013] According to the present invention, even if the suction and holding member moves above the thread depositing guide after the thread is deposited in the thread depositing guide, the thread traveling between the suction and holding member and the thread depositing guide comes into contact with the inhibition portion from below, and is restricted from moving above the inhibition portion. This makes it possible to more reliably prevent the thread from coming into contact with the fulcrum guide during threading.

[0014] In the yarn winding machine of the present invention, it is preferable that the fulcrum guide is rotatable about a central axis.

[0015] According to the present invention, it is possible to prevent the rotary fulcrum guide from receiving a large force from the yarn during threading, and therefore to prevent the fulcrum guide from receiving a large torque from the yarn and rotating at high speed during threading, and to effectively prevent deterioration of the bearing structure of the fulcrum guide.

[0016] In the yarn winding machine of the present invention, it is preferable that the fulcrum guide is fixedly disposed.

[0017] According to the present invention, it is possible to prevent the fixed fulcrum guide from receiving a large force from the yarn during threading. Therefore, it is possible to prevent the yarn from being strongly pressed against the fulcrum guide during threading, and it is possible to effectively prevent the fulcrum guide from being severely worn.

[0018] In the yarn winding machine of the present invention, it is preferable that the yarn deposit guide is configured so that the yarn is detached and hooked onto the fulcrum guide as the yarn is hooked onto a component part of the yarn winding machine that is downstream of the fulcrum guide in the yarn running direction.

[0019] In the present invention, the yarn is released from the yarn deposit guide as the yarn is threaded onto the component part downstream of the fulcrum guide, so that the operation for releasing the yarn from the yarn deposit guide is not required, and the yarn can be easily transferred from the yarn deposit guide to the fulcrum guide.

[0020] In the yarn winding machine of the present invention, the yarn depositing guide is preferably configured so that the yarn is released as the yarn is hooked onto a groove formed on the circumferential surface of the bobbin.

[0021] According to the present invention, the yarn is released from the yarn depositing guide as the yarn is hooked onto the groove formed on the circumferential surface of the bobbin. This eliminates the need for an action to remove the yarn from the yarn depositing guide, and makes it easy to transfer the yarn from the yarn depositing guide to the fulcrum guide.

[0022] In the yarn winding machine of the present invention, a downstream member that can move with the yarn hooked thereon is disposed downstream of the fulcrum guide in the yarn running direction, and it is preferable that the yarn deposit guide is configured so that the yarn is released as the downstream member moves.

[0023] According to the present invention, the yarn is released from the yarn depositing guide as the downstream member moves, which eliminates the need for an action to remove the yarn from the yarn depositing guide, and makes it easy to transfer the yarn from the yarn depositing guide to the fulcrum guide.

[0024] In the yarn winding machine of the present invention, it is preferable that the yarn depositing guide has a yarn depositing portion that extends in an axial direction of the fulcrum guide and where the yarn is deposited.

[0025] According to the present invention, the yarn can be easily deposited in the yarn depositing guide by simply aligning the yarn with the yarn depositing portion extending in the axial direction.

[0026] In the yarn winding machine of the present invention, it is preferable that the yarn depositing portion extends halfway along the fulcrum guide in the axial direction.

[0027] According to the present invention, the yarn that has come off the end of the yarn depositing section is positioned midway through the fulcrum guide in the axial direction. Therefore, the yarn that has come off the yarn depositing guide can be handed over to the fulcrum guide without moving it in the axial direction. Therefore, it is easy to hand over the yarn that has come off the yarn depositing guide to the fulcrum guide.

[0028] In the yarn winding machine of the present invention, it is preferable that the yarn depositing guide has a yarn drop-out section extending in a direction intersecting the axial direction and preventing the yarn from dropping out from the yarn depositing section.

[0029] According to the present invention, the fall-off prevention portion can prevent the thread from unintentionally coming off the thread deposit guide.

[0030] In the yarn winding machine of the present invention, it is preferable that a plurality of the guide units are arranged in the winding axis direction of the bobbin holder.

[0031] According to this yarn winding machine, it is possible to prevent the plurality of fulcrum guides, against which the yarn is strongly pressed during threading, from receiving a large force from the yarn. [Brief description of the drawings]

[0032] [Figure 1] FIG. 2 is a side view of the spinning take-up device according to the embodiment. [Diagram 2] 11 is a side view showing a plurality of guide units arranged in the front-rear direction. FIG. [Diagram 3] FIG. 4 is a side view of the second guide unit. [Figure 4] 13 is a side view of the second guide unit when it is assumed that the yarn is directly hooked on the fulcrum guide during yarn hooking. FIG. [Diagram 5] This is a view of Figure 3 as seen from direction V. [Figure 6] 1A is a side view of the fulcrum guide during yarn winding, and FIG. 1B is a table showing the relationship between the bending angle of the yarn hung on the fulcrum guide during yarn winding and the number of rotations of the fulcrum guide. [Figure 7] FIG. 11 is a side view of a second guide unit according to a second modified example. [Figure 8] FIG. 13 is a side view of a second guide unit according to a third modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment in which a yarn winding machine having a guide unit according to the present invention is applied to a yarn take-up device will be described with reference to the drawings.

[0034] (Yarn take-off device) 1 is a side view of the yarn take-off device 1 according to the present embodiment. In this specification, the front, rear, left, right, top and bottom directions shown in FIG.

[0035] The yarn take-off 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 spinning take-off 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 rotated 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.

[0036] The yarn winding machine 10 is disposed below the godet rollers 3 and 4. The yarn winding machine 10 has two bobbin holders 13 that are supported at one end by a turret 12 built into a machine base 11. The bobbin holder 13 extends in the front-rear direction. That is, the winding axis direction of the bobbin holder 13 is the front-rear direction. The rear end of the bobbin holder 13 is supported by the turret 12. A plurality of bobbins B can be mounted in the front-rear direction in the bobbin holder 13. A groove 50 is formed on the circumferential surface of each bobbin B mounted on the bobbin holder 13 (see FIG. 1). More specifically, the groove 50 on which the yarn is hung is formed at a position near the end of the circumferential surface of each bobbin B. The yarn Y spun from the spinning device 2 is first hung on the groove 50 formed on the bobbin B, and then the yarn Y is traversed by a traverse device 17 (described later) to be wound around the entire circumferential surface of the bobbin B. The bobbin holder 13 is rotated around its axis by a motor (not shown).

[0037] The turret 12 is a disk-shaped member having a rotation axis parallel to the front-rear direction, and has bobbin holders 13 attached at 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 position and the lower position. In the bobbin holder 13 in the upper position, a plurality of yarns Y are wound around a plurality of bobbins B to form a plurality of packages P. Meanwhile, in the bobbin holder 13 in the lower position, the plurality of packages P are collected and new a plurality of bobbins B are attached.

[0038] The yarn winding machine 10 has a support frame 14 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 plurality of guide units 15 are disposed above the support frame 14. The plurality of guide units 15 are arranged in a line in the front-rear direction, the number of which is equal to the number of the yarns Y. That is, in this embodiment, 16 guide units 15 are arranged in a line in the front-rear direction. Note that in FIG. 2(a), illustration of some of the 16 guide units 15 is omitted. Each guide unit 15 has a fulcrum guide 16. The support frame 14 has traverse devices 17 arranged in a line in the front-rear direction, the number of which is equal to the number of the yarns Y. The traverse devices 17 traverse the yarns Y in the front-rear direction, using the fulcrum guides 16 of the corresponding guide units 15 as fulcrums.

[0039] A contact roller 18 rotatably supported by the support frame 14 is disposed below 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 at the upper position. During yarn winding, the contact roller 18 rotates while applying a predetermined contact pressure to the package P, thereby shaping the package P.

[0040] (Guide unit) The configuration of the guide unit 15 will be described with reference to FIGS. 2 to 5. FIG. 2 is a side view of the guide units 15 arranged in the front-rear direction. FIG. 2a shows a state where the guide units 15 are located at the separated position, and FIG. 2b shows a state where the guide units 15 are located at the close position. The separated position is the position of the guide units 15 when the yarns Y are wound around the bobbins B. The close position is the position of the guide units 15 when the yarns Y are hooked on the guide units 15. The guide units 15 at the close position are close to each other. The guide units 15 at the separated position are farther apart from each other than when they are at the close position. The guide units 15 are configured to be movable between the separated position and the close position. Moreover, the guide units 15 at the close position are shifted forward in the front-rear direction as a whole than when they are at the separated position. In this embodiment, the threading operation on the guide units 15 is performed from the front side of the yarn winding machine 10.

[0041] The multiple guide units 15 are divided into a first guide unit 15a and a second guide unit 15b. The first guide units 15a are the front 12 guide units 15 of the 16 guide units 15. The second guide units 15b are the rear 4 guide units 15 of the 16 guide units 15. Hereinafter, when simply referring to the guide units 15, this refers to both the first guide unit 15a and the second guide unit 15b. First, a configuration common to the first guide unit 15a and the second guide unit 15b will be described.

[0042] (Configuration common to the first guide unit and the second guide unit) As shown in FIG. 2, each guide unit 15 has a fulcrum guide 16 and a slider 21. The fulcrum guide 16 is a guide that serves as a fulcrum when the yarn Y is traversed by the traverse device 17 and wound around the bobbin B. The fulcrum guide 16 has a cylindrical shape. The axial direction of the fulcrum guide 16 is the left-right direction. The fulcrum guide 16 is configured to be rotatable around a central axis. A predetermined amount of rotational resistance is applied to the fulcrum guide 16. The yarn Y is hung on the outer peripheral surface of the fulcrum guide 16 and runs in contact with the outer peripheral surface of the fulcrum guide 16 during yarn winding.

[0043] The slider 21 is a member that supports the fulcrum guide 16. The slider 21 is slidably attached to a guide rail 22 that extends in the front-rear direction. More specifically, a plurality of sliders 21 are slidably attached to the guide rail 22 in a state where they are lined up in the front-rear direction. Adjacent sliders 21 are connected to each other by a belt (not shown). The guide rail 22 is fixed to the support frame 14 via a bracket (not shown). Each slider 21 is driven to move in the front-rear direction along the guide rail 22 by an air cylinder 23. As a result, each guide unit 15 moves between a separated position and a close position. The air cylinder 23 is disposed behind the rearmost slider 21. For example, a rod 23a of the air cylinder 23 is connected to the rearmost slider 21. The drive device that moves the plurality of sliders 21 is not limited to the air cylinder 23, and may be another actuator such as a motor.

[0044] Here, the threading of the yarn on the fulcrum guide 16 is performed, for example, by an operator operating a suction gun 60 (a suction-holding member, see FIG. 3, etc.) that suction-holds the yarn Y. When the yarn Y is suction-held by the suction gun 60, the tension of the yarn Y is greater than when the yarn Y is being wound. When threading the yarn on the multiple fulcrum guides 16 provided in the yarn winding machine 10, the yarn Y is hung in a greatly bent state on the fulcrum guides 16 that are located away from the place where the operator operates the suction gun 60 (i.e., the front side of the yarn winding machine 10). Taking the present embodiment as an example, for example, the yarn Y is hung in a greatly bent state on the fulcrum guides 16 provided in the rear four guide units 15 out of the 16 guide units 15. When the yarn Y, which is held by suction by the suction gun 60 and thus has a large tension, is hung on the fulcrum guide 16, if the yarn Y comes into contact with the fulcrum guide 16 in a greatly bent state, the yarn Y is pressed strongly against the fulcrum guide 16, and the fulcrum guide 16 receives a large force from the yarn Y. This causes the following problem.

[0045] In the case of the rotary fulcrum guide 16 configured to be rotatable around the central axis as in this embodiment, the fulcrum guide 16 may receive a large force from the yarn Y, causing the fulcrum guide 16 to rotate at high speed. If this happens, the bearing structure of the fulcrum guide 16 may not be able to withstand the high speed rotation and may be damaged.

[0046] For example, FIG. 6(b) shows the results of measuring the bending angle θ (degrees) of the yarn Y hung on each fulcrum guide 16 provided on the four rear guide units 15 out of the 16 guide units 15 with respect to the fulcrum guide 16 and the rotation speed (rpm) of the fulcrum guide 16 during yarn winding. The ends in FIG. 6(b) are the numbers of the fulcrum guides 16 when the fulcrum guides 16 are counted from the front side in the front-rear direction as 1, 2, 3, .... That is, the ends 13 to 16 in FIG. 6(b) refer to the four rear fulcrum guides 16. The bending angle θ is the bending angle between the vectors XQ and XR when viewed from the left-right direction (the axial direction of the fulcrum guide 16) (see FIG. 6(a)). X is the center of the fulcrum guide 16. Q is the contact point between the yarn Y and the fulcrum guide 16 on the outer circumferential surface of the fulcrum guide 16 on the upstream side in the yarn running direction during yarn winding. R is a contact point between the yarn Y and the fulcrum guide 16 on the outer circumferential surface of the fulcrum guide 16 on the downstream side in the yarn running direction when the yarn Y is deposited on the yarn deposit guide 31. A vector XQ is a vector starting from X and ending at Q. A vector XR is a vector starting from X and ending at R. As shown in FIG. 6(b), during yarn winding, the bending angle θ becomes larger as the fulcrum guide 16 is disposed on the rear side, and the number of rotations of the fulcrum guide 16 increases at an accelerated rate. Here, as described above, the yarn threading operation on the multiple guide units 15 is performed from the front side of the yarn winding machine 10. That is, when the yarn is threaded on the fulcrum guide 16, the yarn Y is pulled significantly forward after being threaded on the fulcrum guide 16. Therefore, it is clear that the bending angle θ of the yarn Y hung on the fulcrum guide 16 becomes larger when the yarn is threaded on the fulcrum guide 16 than when the yarn is wound. The degree of increase in the bending angle θ during threading is more remarkable for the guide unit 15 located on the rear side. 6(b) shows that the larger the bending angle θ, the larger the number of rotations of the fulcrum guide 16. From the above, it can be said that if the bending angle θ becomes even larger during threading, the fulcrum guide 16 will receive a large force from the yarn Y, causing the fulcrum guide 16 to rotate at high speed, and the bearing structure of the fulcrum guide 16 will not be able to withstand the high speed rotation and may be damaged.

[0047] Therefore, the inventors of the present application have thoroughly studied a configuration in which the rear guide unit 15 is provided with a thread deposit guide 31, which will be described later, in order to prevent the fulcrum guide 16 from receiving a large force from the thread Y during threading. In this embodiment, the rear four guide units 15 out of the 16 guide units 15 are second guide units 15b, but the present invention is not limited to this.

[0048] (Second guide unit) The configuration of the second guide unit 15b having the yarn deposit guide 31 will be described below with reference to Figs. 3 to 5. In this embodiment, four second guide units 15b are arranged, and the second guide units 15b are lined up in the front-rear direction (the winding axis direction of the bobbin holder 13). The second guide unit 15b having the yarn deposit guide 31 corresponds to the guide unit of the present invention. The configuration of the second guide unit 15b common to the first guide unit 15a is as described above. Fig. 3 is a side view of the second guide unit 15b. Fig. 4 is a side view of the second guide unit when it is assumed that the yarn is directly hung on the fulcrum guide during threading. Fig. 5 is a side view of Fig. 3 as seen from the V direction.

[0049] As shown in Fig. 3, the second guide unit 15b has a yarn depositing guide 31. The yarn depositing guide 31 is a guide into which the yarn Y is deposited when the yarn Y is threaded on the fulcrum guide 16 while being sucked and held by the suction gun 60. In this embodiment, the yarn Y deposited on the yarn depositing guide 31 during threading is configured to come into contact with the circumferential surface of the fulcrum guide 16 downstream of the yarn depositing guide 31 in the yarn running direction. More specifically, a yarn depositing section 32 (described later) of the yarn depositing guide 31 is located substantially directly behind the fulcrum guide, and the yarn Y deposited on the yarn depositing guide 31 during threading comes into contact with the circumferential surface of the fulcrum guide 16 in front of and below the yarn depositing guide 31.

[0050] The yarn depositing guide 31 is configured so that the yarn Y comes off as the yarn Y is hooked onto a component of the yarn winding machine 10 that is downstream of the fulcrum guide 16 in the yarn running direction, and is then hooked onto the fulcrum guide 16. Specifically, the yarn depositing guide 31 is configured so that the yarn Y comes off as the yarn Y is hooked onto a groove 50 formed on the circumferential surface of the bobbin B, which is a component downstream of the fulcrum guide 16 in the yarn running direction.

[0051] Moreover, the line depositing guide 31 is disposed at a position that satisfies the following formula (1). θ1<θ2 (1)

[0052] As shown in FIG. 3, θ1 is a bending angle between the first vector XA and the second vector XB when viewed from the left-right direction (the axial direction of the fulcrum guide 16) when the yarn Y is placed on the yarn deposit guide 31 during threading on the fulcrum guide 16. X is the center of the fulcrum guide 16. A is a contact point on the outer circumferential surface of the fulcrum guide 16 on the upstream side in the yarn running direction between the yarn Y and the fulcrum guide 16 when the yarn Y is placed on the yarn deposit guide 31. B is a contact point on the outer circumferential surface of the fulcrum guide 16 on the downstream side in the yarn running direction between the yarn Y and the fulcrum guide 16 when the yarn Y is placed on the yarn deposit guide 31. The first vector XA is a vector starting at X and ending at A. The second vector XB is a vector starting at X and ending at B. When the yarn Y placed on the yarn deposit guide 31 contacts the fulcrum guide 16 at one point, θ1 is 0 degrees.

[0053] As shown in FIG. 4, θ2 is a virtual bending angle between the virtual first vector XC and the virtual second vector XD when viewed from the left-right direction (axial direction of the fulcrum guide 16) on the assumption that the yarn Y is directly hung on the fulcrum guide 16 without being placed on the yarn deposit guide 31 when the yarn is threaded on the fulcrum guide 16. C is a contact point on the outer circumferential surface of the fulcrum guide 16 on the upstream side in the yarn running direction between the yarn Y and the fulcrum guide 16 when the yarn Y is directly hung on the fulcrum guide 16 without being placed on the yarn deposit guide 31. D is a contact point on the outer circumferential surface of the fulcrum guide 16 on the downstream side in the yarn running direction between the yarn Y and the fulcrum guide 16 when the yarn Y is directly hung on the fulcrum guide 16 without being placed on the yarn deposit guide 31. The virtual first vector XC is a vector starting from X and ending at C. The virtual second vector XD is a vector starting from X and ending at D.

[0054] Further, the thread depositing guide 31 has a thread depositing section 32 and a drop-out prevention section 33. As shown in FIG. 5, the thread depositing section 32 is a section where the thread Y that is to be hooked on the fulcrum guide 16 is deposited when the thread is hooked on the fulcrum guide 16. The thread depositing section 32 extends in the left-right direction (the axial direction of the fulcrum guide 16). More specifically, the thread depositing section 32 extends halfway along the fulcrum guide 16 in the left-right direction. In other words, the thread depositing section 32 extends to a position to the left of the right end of the fulcrum guide 16 and to the right of the left end in the left-right direction. The thread depositing section 32 is configured so that the thread Y can be removed from its left end. Also, the thread depositing section 32 is inclined so that the upper end is rearward of the lower end when viewed from the left-right direction (see FIG. 3).

[0055] The fall-off prevention portion 33 is a portion for preventing the thread Y from falling off from the thread depositing portion 32. As shown in Figs. 3 and 5, the fall-off prevention portion 33 extends in a direction perpendicular to the left-right direction (the axial direction of the fulcrum guide 16). Specifically, the fall-off prevention portion 33 extends downward from the end portion (i.e., the left end portion) of the thread depositing portion 32 on the side from which the thread Y is removed. The fall-off prevention portion 33 is also inclined so that the upper end is closer to the front than the lower end (see Fig. 3). When the thread Y deposited in the thread depositing portion 32 moves toward the left end portion, which is the end portion of the thread depositing portion 32 on the side from which the thread Y is removed, the thread Y comes into contact with the right side surface of the fall-off prevention portion 33, thereby being prevented from falling off.

[0056] (Threading the fulcrum guide) Next, the procedure for the operator to use the suction gun 60 to thread the yarn on the fulcrum guide 16 will be described below. Note that the description of the procedure for the operator to operate the suction gun 60 to thread the yarn Y spun from the spinning device 2 on the godet rollers 3 and 4 will be omitted.

[0057] The operator operates the suction gun 60 to hook the multiple yarns Y sent from the godet roller 4 onto the fulcrum guides 16 of each guide unit 15. At this time, the operator operates the suction gun 60 to deposit the yarns Y to be hooked onto the fulcrum guide 16 of the second guide unit 15b into the yarn deposit guide 31 (see FIG. 3).

[0058] Next, the operator operates the suction gun 60 to advance the threading of the yarn to components downstream of the fulcrum guide 16. The components downstream of the fulcrum guide 16 are, for example, a plurality of traverse guides (not shown) provided in the traverse device 17, a separator (not shown), and grooves 50 formed on the circumferential surface of each bobbin B attached to the bobbin holder 13. The separator is a member for guiding the yarn Y threaded on the traverse guide to a position where the yarn Y can be wound around each bobbin B attached to the bobbin holder 13. The separator will not be described in detail here.

[0059] As threading of the yarn Y progresses to the components downstream of the fulcrum guide 16 and the yarn Y is hooked into the grooves 50 formed on the circumferential surface of each bobbin B attached to the bobbin holder 13, the yarn Y hooked into the yarn deposit guide 31 is pulled to the left (see the solid arrow in FIG. 5). Then, the yarn Y passes the fall-off prevention portion 33, leaves the yarn deposit guide 31, and is hooked directly onto the fulcrum guide 16. The yarn path of the yarn Y that has left the yarn deposit guide 31 and is hooked onto the fulcrum guide 16 is shown by a dotted line in FIG. 5. This completes threading of the yarn Y onto the fulcrum guide 16.

[0060] (effect) The yarn winding machine 10 of the present embodiment includes a second guide unit 15b having a cylindrical fulcrum guide 16 and a yarn depositing guide 31 into which the yarn Y hung on the fulcrum guide 16 is deposited when the yarn Y is threaded on the fulcrum guide 16 while being sucked and held by the suction gun 60. The yarn depositing guide 31 is disposed so as to satisfy the following formula (1). θ1<θ2 (1) θ1: the bending angle between a first vector XA having the center X of the fulcrum guide 16 as a starting point and a contact point A of the outer peripheral surface of the fulcrum guide 16 on the upstream side in the yarn running direction between the yarn Y and the fulcrum guide 16 as an end point, and a second vector XB having the center X of the fulcrum guide 16 as a starting point and a contact point B of the outer peripheral surface of the fulcrum guide 16 on the downstream side in the yarn running direction between the yarn Y and the fulcrum guide 16 as an end point, when viewed from the left-right direction (the axial direction of the fulcrum guide 16) when the yarn Y is deposited in the yarn deposit guide 31 during threading on the fulcrum guide 16 θ2: a virtual bending angle formed by a virtual first vector XC having the center X of the fulcrum guide 16 as a starting point and a contact point C of the outer peripheral surface of the fulcrum guide 16 on the upstream side in the yarn running direction between the yarn Y and the fulcrum guide 16, when viewed from the left-right direction (axial direction of the fulcrum guide 16), the virtual first vector XC having the center X of the fulcrum guide 16 as a starting point and a contact point D of the outer peripheral surface of the fulcrum guide 16 on the downstream side in the yarn running direction between the yarn Y and the fulcrum guide 16, the virtual second vector XD having the center X of the fulcrum guide 16 as a starting point and a contact point D of the outer peripheral surface of the fulcrum guide 16 on the downstream side in the yarn running direction between the yarn Y and the fulcrum guide 16, when viewed from the left-right direction (axial direction of the fulcrum guide 16), when assuming that the yarn Y is directly hung on the fulcrum guide 16 without being laid on the yarn laying guide 31 when the yarn is laid on the fulcrum guide 16

[0061] In a state where the suction gun 60 sucks and holds the yarn Y to thread the fulcrum guide 16, the tension of the yarn Y is greater than that during winding. When the yarn Y with such a large tension is threaded on the fulcrum guide 16, if the yarn Y comes into contact with the fulcrum guide 16 in a greatly bent state, the yarn Y is pressed strongly against the fulcrum guide 16, and the fulcrum guide 16 receives a large force from the yarn Y. According to this embodiment, the bending angle θ1 of the yarn Y with respect to the fulcrum guide 16 when the yarn Y is placed on the yarn deposit guide 31 during threading can be made smaller than the virtual bending angle θ2 of the yarn Y with respect to the fulcrum guide 16 when the yarn Y is directly hung on the fulcrum guide 16. That is, by placing the yarn Y on the yarn deposit guide 31 during threading, the yarn Y can be prevented from coming into contact with the fulcrum guide 16 in a greatly bent state. This makes it possible to prevent the fulcrum guide 16 from receiving a large force from the yarn Y during threading.

[0062] Furthermore, in the yarn winding machine 10 of the present embodiment, the fulcrum guide 16 is rotatable about the central axis. This makes it possible to prevent the rotatable fulcrum guide 16 from receiving a large force from the yarn Y during threading. This makes it possible to prevent the fulcrum guide 16 from receiving a large torque from the yarn Y during threading and rotating at high speed, thereby effectively preventing deterioration of the bearing structure of the fulcrum guide 16.

[0063] Furthermore, in the yarn winding machine 10 of this embodiment, the yarn depositing guide 31 is configured so that the yarn Y is released when the yarn is hooked onto a component of the yarn winding machine 10 that is downstream of the fulcrum guide 16 in the yarn running direction, and is then hooked onto the fulcrum guide 16. This eliminates the need for an operation to release the yarn Y from the yarn depositing guide 31, and makes it easy to transfer the yarn Y from the yarn depositing guide 31 to the fulcrum guide 16.

[0064] Furthermore, in the yarn winding machine 10 of this embodiment, the yarn depositing guide 31 is configured so that the yarn Y is released as the yarn Y is hung in the groove 50 formed on the circumferential surface of the bobbin B. This eliminates the need for an operation to remove the yarn Y from the yarn depositing guide 31, and makes it easy to transfer the yarn Y from the yarn depositing guide 31 to the fulcrum guide 16.

[0065] Furthermore, in the yarn winding machine 10 of this embodiment, the yarn depositing guide 31 extends in the left-right direction (the axial direction of the fulcrum guide 16) and has a yarn depositing section 32 in which the yarn Y is deposited. This makes it easy to deposit the yarn Y in the yarn depositing guide 31 by simply aligning the yarn Y with the yarn depositing section 32 extending in the left-right direction.

[0066] Furthermore, in the yarn winding machine 10 of this embodiment, the yarn depositing section 32 extends halfway up the fulcrum guide 16 in the left-right direction (the axial direction of the fulcrum guide 16). As a result, the yarn Y that has come off the end of the yarn depositing section 32 is located halfway up the fulcrum guide 16 in the left-right direction. Therefore, the yarn Y that has come off the yarn depositing guide 31 can be delivered to the fulcrum guide 16 without moving it in the left-right direction. This makes it easy to deliver the yarn Y that has come off the yarn depositing guide 31 to the fulcrum guide 16.

[0067] Furthermore, in the yarn winding machine 10 of this embodiment, the yarn depositing guide 31 extends in a direction perpendicular to the left-right direction (the axial direction of the fulcrum guide 16) and has a fall-off prevention portion 33 that prevents the yarn Y from falling off from the yarn depositing portion 32. With this, the fall-off prevention portion 33 can prevent the yarn Y from unintentionally coming off the yarn depositing guide 31.

[0068] Furthermore, in the yarn winding machine 10 of the present embodiment, multiple (four in this embodiment) second guide units 15b are arranged in the front-rear direction (the winding axis direction of the bobbin holder 13). With this type of yarn winding machine 10, it is possible to prevent the multiple fulcrum guides 16 against which the yarn Y is strongly pressed during threading from receiving a large force from the yarn Y.

[0069] (Modification) Modifications of the above embodiment will be described below, with the same reference numerals being used to designate components similar to those in the above embodiment, and descriptions thereof will be omitted where appropriate.

[0070] (First Modification) In the above embodiment, the fulcrum guide 16 is rotatable around the central axis. However, the fulcrum guide 16 may be fixedly disposed. This can prevent the fixed fulcrum guide 16 from receiving a large force from the yarn Y during threading. Therefore, the yarn Y can be prevented from being strongly pressed against the fulcrum guide 16 during threading, and severe wear of the fulcrum guide 16 can be effectively prevented.

[0071] (Second Modification) In the above embodiment, the yarn Y deposited in the yarn depositing guide 31 during threading is configured to contact the peripheral surface of the fulcrum guide 16 downstream of the yarn depositing guide 31 in the yarn running direction (see FIG. 3). However, as shown in FIG. 7, the yarn Y deposited in the yarn depositing guide 31 during threading may be configured to contact the peripheral surface of the fulcrum guide 16 upstream of the yarn depositing guide 31 in the yarn running direction. Specifically, the yarn depositing section 32 of the yarn depositing guide 31 is located below and behind the fulcrum guide, and the yarn Y deposited in the yarn depositing guide 31 during threading contacts the peripheral surface of the fulcrum guide 16 in front of and above the yarn depositing guide 31. Even in this case, the yarn depositing guide 31 is disposed at a position that satisfies the following formula (1). θ1<θ2 (1) It should be noted that θ1 and θ2 are defined in the same manner as in the above embodiment.

[0072] (Third Modification) In the above embodiment and the second modified example, the yarn Y deposited in the yarn depositing guide 31 during threading is configured to contact the circumferential surface of the fulcrum guide 16 on the upstream side or downstream side of the yarn depositing guide 31 in the yarn running direction. However, as shown in FIG. 8, the yarn Y deposited in the yarn depositing guide 131 during threading does not have to contact the fulcrum guide 16. To explain in detail, the yarn depositing guide 131 is a guide for depositing the yarn Y to be hung on the fulcrum guide 16 so as not to come into contact with the fulcrum guide 16 when threading the yarn Y on the fulcrum guide 16 while the yarn Y is sucked and held by the suction gun 60. By providing the yarn depositing guide 131 as in the third modified example, the following effect can be obtained. That is, by depositing the yarn Y in the yarn depositing guide 131 during threading, the fulcrum guide 16 and the yarn Y can be prevented from coming into contact with each other. This makes it possible to prevent the fulcrum guide 16 from receiving a large force from the yarn Y during threading.

[0073] As shown in FIG. 8, in the configuration of the third modified example, an inhibiting portion 35 is provided to inhibit the yarn Y deposited in the yarn depositing guide 131 from contacting the fulcrum guide 16. The inhibiting portion 35 is provided at a position lower than the fulcrum guide 16 and between the suction gun 60 and the yarn depositing guide 131 when threading the yarn on the fulcrum guide 16. Specifically, the inhibiting portion 35 is provided in front of and below the yarn depositing guide 131 and the fulcrum guide 16 (see FIG. 8). The provision of the inhibiting portion 35 provides the following effects. Even if the suction gun 60 moves above the yarn depositing portion of the yarn depositing guide 131 (not shown in FIG. 8) after depositing the yarn Y in the yarn depositing guide 131, the yarn Y traveling between the suction gun 60 and the yarn depositing guide 131 contacts the inhibiting portion 35 from below, and is restricted from moving above the inhibiting portion 35. This makes it possible to more reliably prevent the yarn Y from contacting the fulcrum guide 16 when threading.

[0074] (Fourth Modification) In the above embodiment, the yarn depositing guide 31 is configured so that the yarn Y is released as the yarn Y is hung on the groove 50 formed on the circumferential surface of the bobbin B. However, the yarn depositing guide 31 may be configured so that the yarn is released as the downstream member arranged on the downstream side of the fulcrum guide 16 in the yarn running direction moves. The downstream member is a member that can move with the yarn Y hung on it. Specifically, the downstream member is a plurality of traverse guides (not shown) and a separator (not shown) provided in the traverse device 17. The separator is a member for guiding the yarn Y hung on the traverse guide to a position where the yarn Y is wound on each bobbin B attached to the bobbin holder 13. Note that "hanging the yarn on a component part downstream of the fulcrum guide in the yarn running direction" in the present invention includes the movement of the downstream member described above with the yarn Y hung on it.

[0075] (Other variations) In the above embodiment, the 12 guide units 15 on the front side of the 16 guide units 15 are the first guide units 15a, and the 4 guide units 15 on the rear side are the second guide units 15b. However, this is not limited to this. For example, the 8 guide units 15 on the front side of the 16 guide units 15 may be the first guide units 15a, and the 8 guide units 15 on the rear side may be the second guide units 15b. Or, all the guide units 15 may be the second guide units 15b.

[0076] In the above embodiment, the thread depositing portion 32 extends halfway along the fulcrum guide 16 in the left-right direction (the axial direction of the fulcrum guide 16). However, the thread depositing portion 32 may extend to the outside of the fulcrum guide 16 in the left-right direction. Specifically, the thread depositing portion 32 may extend to a position further left than the left end portion of the fulcrum guide 16 in the left-right direction.

[0077] In the above embodiment, the fall-off prevention portion 33 extends in a direction perpendicular to the left-right direction (the axial direction of the fulcrum guide 16). However, the fall-off prevention portion 33 may extend in a direction that is not perpendicular to the left-right direction (the axial direction of the fulcrum guide 16). Also, the fall-off prevention portion 33 may not be provided.

[0078] In the above embodiment, one second guide unit 15b is provided with one thread depositing guide 31. However, two or more thread depositing guides 31 may be provided with one second guide unit 15b.

[0079] In the above embodiment, the yarn depositing guide 31 is configured so that as the yarn Y is hung in the groove 50 formed on the circumferential surface of the bobbin B, which is a component part of the yarn winding machine 10 downstream of the fulcrum guide 16 in the yarn running direction, the yarn Y is released and hung on the fulcrum guide 16. However, the yarn depositing guide 31 is not limited to this configuration. For example, the yarn depositing guide 31 may be configured so that the yarn Y is released by the operator operating the suction gun 60.

[0080] In the above embodiment, the suction gun 60 is operated by an operator. However, the suction gun 60 may be automatically operated by a robot arm or the like.

[0081] In the third modified example, the inhibiting portion 35 is provided. In this regard, the inhibiting portion 35 may be provided in the configurations of the above embodiment, the first modified example, and the second modified example. In this case, the following effect is obtained. Even if the suction gun 60 moves above the thread depositing portion 32 of the thread depositing guide 31 after the thread Y is deposited in the thread depositing guide 31, the thread Y traveling between the suction gun 60 and the thread depositing guide 31 comes into contact with the inhibiting portion 35 from below, and is restricted from moving above the inhibiting portion 35. This makes it possible to prevent the bending angle θ1 (defined above) from becoming large during threading, and further prevents the fulcrum guide 16 from receiving a large force from the thread Y.

[0082] The present invention is not limited to the yarn take-up device 1, but can be applied to various yarn winding machines configured to wind a plurality of yarns Y. [Explanation of symbols]

[0083] 1. Spinning take-off device 10 Yarn winding machine 15a First guide unit 15b Second guide unit (guide unit of the present invention) 16 Support guide 17 Traverse device 31 Thread Storage Guide 32 Thread storage section 33 Falling prevention part 35 Inhibition 50 grooves 60 Suction Gun B Bobbin Y Thread θ1 Bending angle θ2 Virtual bending angle

Claims

1. A yarn winding machine that winds a plurality of yarns onto a plurality of bobbins attached to a bobbin holder, a cylindrical fulcrum guide that serves as a fulcrum when the yarn is traversed and wound onto the bobbin; a yarn depositing guide into which the yarn is deposited while coming into contact with the fulcrum guide when the yarn is threaded on the fulcrum guide in a state in which the yarn is sucked and held by a suction holding member that sucks and holds the yarn; a guide unit having The line deposit guide is One is provided for each of the guide units, and are arranged so as to satisfy the following formula (1), The yarn winding machine is configured such that, when the yarn is hooked onto a component of the yarn winding machine that is downstream of the fulcrum guide in the yarn running direction, the yarn is released from the yarn deposit guide and hooked onto the fulcrum guide. When the yarn is threaded onto the fulcrum guide, the yarn is deposited in the yarn deposit guide. When viewed from the axial direction of the fulcrum guide, a first vector having a start point at the center of the fulcrum guide and an end point at a contact point between the yarn and the fulcrum guide on the outer peripheral surface of the fulcrum guide on the upstream side in the yarn running direction; a second vector having a start point at the center of the fulcrum guide and an end point at a contact point between the yarn and the fulcrum guide on the outer peripheral surface of the fulcrum guide on the downstream side in the yarn running direction; Bending angle θ2: When the yarn is threaded onto the fulcrum guide, it is assumed that the yarn is directly threaded onto the fulcrum guide without being placed in the yarn placement guide. When viewed from the axial direction of the fulcrum guide, a virtual first vector having a start point at the center of the fulcrum guide and an end point at a contact point between the yarn and the fulcrum guide on the outer peripheral surface of the fulcrum guide on the upstream side in the yarn running direction; a virtual second vector having a starting point at the center of the fulcrum guide and an end point at a contact point between the yarn and the fulcrum guide on the outer peripheral surface of the fulcrum guide on the downstream side in the yarn running direction;

2. A yarn winding machine that winds a plurality of yarns onto a plurality of bobbins attached to a bobbin holder, a cylindrical fulcrum guide that serves as a fulcrum when the yarn is traversed and wound onto the bobbin; a yarn retaining guide that retains the yarn so that the yarn does not come into contact with the fulcrum guide when the yarn is threaded on the fulcrum guide in a state in which the yarn is sucked and held by a suction-holding member that sucks and holds the yarn; a guide unit having The line deposit guide is One is provided for each of the guide units, and The yarn winding machine is characterized in that the suction holding member is provided for at least one of the plurality of guide units that is farthest from the suction holding member.

3. The yarn winding machine according to claim 2, further comprising an inhibiting portion that is positioned below the fulcrum guide and between the suction holding member and the yarn deposit guide when the yarn is threaded onto the fulcrum guide, and that inhibits the yarn deposited on the yarn deposit guide from coming into contact with the fulcrum guide.

4. A yarn winding machine that winds a plurality of yarns onto a plurality of bobbins attached to a bobbin holder, a cylindrical fulcrum guide that serves as a fulcrum when the yarn is traversed and wound onto the bobbin; a yarn depositing guide into which the yarn is deposited while coming into contact with the fulcrum guide when the yarn is threaded on the fulcrum guide in a state in which the yarn is sucked and held by a suction holding member that sucks and holds the yarn; a guide unit having The line deposit guide is One is provided for each of the guide units, and are arranged so as to satisfy the following formula (1), The yarn winding machine is characterized in that the bending angle θ of the yarn hung on the fulcrum guide is larger than that during yarn winding. When the yarn is threaded onto the fulcrum guide, the yarn is deposited in the yarn deposit guide. When viewed from the axial direction of the fulcrum guide, a first vector having a start point at the center of the fulcrum guide and an end point at a contact point between the yarn and the fulcrum guide on the outer peripheral surface of the fulcrum guide on the upstream side in the yarn running direction; a second vector having a start point at the center of the fulcrum guide and an end point at a contact point between the yarn and the fulcrum guide on the outer peripheral surface of the fulcrum guide on the downstream side in the yarn running direction; Bending angle θ2: When the yarn is threaded onto the fulcrum guide, it is assumed that the yarn is directly threaded onto the fulcrum guide without being placed in the yarn placement guide. When viewed from the axial direction of the fulcrum guide, a virtual first vector having a start point at the center of the fulcrum guide and an end point at a contact point between the yarn and the fulcrum guide on the outer peripheral surface of the fulcrum guide on the upstream side in the yarn running direction; a virtual second vector having a starting point at the center of the fulcrum guide and an end point at a contact point between the yarn and the fulcrum guide on the outer peripheral surface of the fulcrum guide on the downstream side in the yarn running direction;

5. The yarn winding machine according to claim 1, wherein the fulcrum guide is rotatable about a central axis.

6. The yarn winding machine according to claim 2, wherein the fulcrum guide is rotatable about a central axis.

7. The yarn winding machine according to claim 3, wherein the fulcrum guide is rotatable about a central axis.

8. The yarn winding machine according to claim 4, wherein the fulcrum guide is rotatable about a central axis.

9. The yarn winding machine according to claim 1 , wherein the fulcrum guide is fixedly disposed.

10. The yarn winding machine according to claim 2, wherein the fulcrum guide is fixedly disposed.

11. The yarn winding machine according to claim 3, wherein the fulcrum guide is fixedly disposed.

12. The yarn winding machine according to claim 4, wherein the fulcrum guide is fixedly disposed.

13. The yarn winding machine according to claim 2, characterized in that the yarn deposit guide is configured so that, as the yarn is threaded onto a component of the yarn winding machine that is downstream of the fulcrum guide in the yarn running direction, the yarn is released from the yarn deposit guide and threaded onto the fulcrum guide.

14. The yarn winding machine according to claim 3, characterized in that the yarn deposit guide is configured so that, as the yarn is threaded onto a component of the yarn winding machine that is downstream of the fulcrum guide in the yarn running direction, the yarn is released from the yarn deposit guide and threaded onto the fulcrum guide.

15. The yarn winding machine according to claim 4, characterized in that the yarn deposit guide is configured so that, as the yarn is threaded onto a component of the yarn winding machine that is downstream of the fulcrum guide in the yarn running direction, the yarn is released from the yarn deposit guide and threaded onto the fulcrum guide.

16. The yarn winding machine according to claim 9, wherein the yarn winding guide is configured so that the yarn is released from the yarn winding guide as the yarn is hooked into a groove formed on the circumferential surface of the bobbin.

17. The yarn winding machine according to claim 10, wherein the yarn winding guide is configured so that the yarn is released from the yarn winding guide as the yarn is hooked into a groove formed on the circumferential surface of the bobbin.

18. The yarn winding machine according to claim 11, wherein the yarn winding guide is configured such that the yarn is released from the yarn winding guide as the yarn is hooked into a groove formed on the circumferential surface of the bobbin.

19. The yarn winding machine according to claim 12, wherein the yarn winding guide is configured such that the yarn is released from the yarn winding guide as the yarn is hooked into a groove formed on the circumferential surface of the bobbin.

20. a downstream member that is movable with the yarn hooked thereon is disposed downstream of the fulcrum guide in the yarn running direction, The yarn winding machine according to claim 9, wherein the yarn depositing guide is configured so that the yarn is released as the downstream member moves.

21. A downstream member that is movable with the yarn hooked thereon is disposed downstream of the fulcrum guide in the yarn running direction, The yarn winding machine according to claim 10, wherein the yarn depositing guide is configured so that the yarn is released as the downstream member moves.

22. A downstream member that is movable with the yarn hooked thereon is disposed downstream of the fulcrum guide in the yarn running direction, The yarn winding machine according to claim 11, wherein the yarn depositing guide is configured so that the yarn is released as the downstream member moves.

23. a downstream member that is movable with the yarn hooked thereon is disposed downstream of the fulcrum guide in the yarn running direction, The yarn winding machine according to claim 12, wherein the yarn depositing guide is configured so that the yarn is released as the downstream member moves.

24. The yarn winding machine according to any one of claims 1 to 23, wherein the yarn depositing guide has a yarn depositing portion that extends in an axial direction of the fulcrum guide and into which the yarn is deposited.

25. The yarn winding machine according to claim 24, wherein the yarn depositing portion extends partway along the axial direction of the fulcrum guide.

26. The yarn winding machine according to claim 24, wherein the yarn depositing guide has a drop-out prevention portion extending in a direction intersecting the axial direction and preventing the yarn from dropping out from the yarn depositing portion.

27. The yarn winding machine according to claim 25, wherein the yarn depositing guide has a drop-out prevention portion extending in a direction intersecting the axial direction and preventing the yarn from dropping out from the yarn depositing portion.

28. The yarn winding machine according to any one of claims 1 to 23, wherein a plurality of the guide units are arranged in the direction of the winding axis of the bobbin holder.

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