阅读说明：本技术 纱线卷取机以及卷装的生产方法 (Yarn winding machine and package production method ) 是由 桥本欣三 播戸志郎 冈田竹弘 于 2019-08-19 设计创作，主要内容包括：本发明涉及纱线卷取机以及卷装的生产方法。通过蠕动有效地消除凸边,并且防止掉纱的产生。对横动导纱器(33)的动作进行控制的控制装置(13)能够执行使横动导纱器(33)在规定的标准位置(Ts)反转的通常控制、以及使横动导纱器(33)在从标准位置(Ts)向内侧离开规定的分离距离(L)的蠕动区域(C)内的蠕动位置(T1～T4)反转的蠕动控制,能够针对横动导纱器(33)的每次往复移动来设定是执行通常控制和蠕动控制的哪个。(The present invention relates to a yarn winding machine and a package production method. The convex edge is effectively eliminated by the creeping motion and the generation of the falling yarn is prevented. A control device (13) for controlling the operation of a traverse guide (33) can execute normal control for reversing the traverse guide (33) at a predetermined standard position (Ts) and creep control for reversing the creep positions (T1-T4) of the traverse guide (33) in a creep region (C) which is separated from the standard position (Ts) by a predetermined separation distance (L) inward, and can set which of the normal control and the creep control is executed for each reciprocation of the traverse guide (33).)

1. A yarn winding machine that winds a yarn around a bobbin to produce a package while reciprocating a traverse guide, on which the yarn is hooked, in a predetermined traverse direction, the yarn winding machine comprising:

a guide driving section that reciprocates the traverse guide in the traverse direction; and

a control device for controlling the yarn guide driving part,

the control device can execute:

a normal control for reversing the traverse guide at a predetermined standard position; and

a creep control for reversing a creep position of the traverse guide in a creep region separated from the standard position to an inner side by a predetermined separation distance,

it is possible to set which of the normal control and the creep control is to be executed for each reciprocation of the traverse guide.

2. The yarn winding machine of claim 1,

a plurality of the creep positions are set in the creep area.

3. Yarn winding machine according to claim 1 or 2,

the separation distance is 10mm to 30 mm.

4. Yarn winding machine according to one of claims 1 to 3,

the width of the creeping region in the traverse direction is 5mm to 20 mm.

5. Yarn winding machine according to one of claims 1 to 4,

the ratio of the number of times of the creep control to the total number of times of the normal control and the creep control is 10% or more and less than 50%.

6. Yarn winding machine according to one of claims 1 to 5,

the above-described normal control is performed immediately before and immediately after the above-described creep control.

7. Yarn winding machine according to one of claims 1 to 6,

the traverse guide is attached to a belt member driven by the guide driving section.

8. A method for producing a package by winding a yarn around a bobbin while reciprocating a traverse guide having the yarn hooked thereon in a predetermined traverse direction, the method comprising:

a normal step of reversing the traverse guide at a predetermined standard position; and

a creeping step of reversing a creeping position of the traverse guide in a creeping region that is separated inward from the standard position by a predetermined separation distance,

the normal step and the creeping step are set to be executed for each reciprocation of the traverse guide.

Technical Field

The present invention relates to a yarn winding machine and a package production method for producing a package by winding a yarn around a bobbin while reciprocating a traverse guide on which the yarn is hooked in a predetermined traverse direction.

Background

For example, the yarn winding machine described in patent documents 1 and 2 produces a package by winding a yarn around a bobbin while reciprocating a traverse guide, on which the yarn is hooked, in a predetermined traverse direction. In such a yarn winding machine, when the winding speed is high or the free length (the yarn between the traverse guide and the package) is long, it is difficult to reverse the yarn at an acute angle by the traverse guide. As a result, more yarn is wound around both ends of the package, and a protrusion called a "bulge" is formed at both ends of the package. The raised edge is not preferable because it causes unevenness in the packing density, poor appearance, unwinding failure, and the like.

Therefore, in patent documents 1 and 2, in order to suppress the formation of the convex edge, "creeping" is configured to reverse the traverse guide at a position inside the standard position. Specifically, the traverse guide is configured to be periodically reversed at a position inside the standard position by changing the reciprocating range of the traverse guide by the cam mechanism. This reduces the amount of yarn wound around both ends of the package, thereby suppressing bulging.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 61-145075

Patent document 2: japanese laid-open patent publication No. 62-211274

Disclosure of Invention

Problems to be solved by the invention

However, the cam mechanisms provided in patent documents 1 and 2 are mechanisms for gradually decreasing and gradually increasing the traverse width of the traverse guide during the creeping. As described above, since a considerable amount of the yarn is wound in the range where the raised edge is formed by gradually decreasing and gradually increasing the traverse width, the raised edge cannot be effectively eliminated. Further, since a considerable number of winding layers are formed during creeping, a step is likely to be formed on the package surface, and yarn breakage may occur when the traverse width is returned to the standard width.

In view of the above problems, an object of the present invention is to effectively eliminate the bulge by creeping and to prevent the occurrence of yarn dropping.

Means for solving the problems

A yarn winding machine according to the present invention is a yarn winding machine that winds a yarn around a bobbin to produce a package while reciprocating a traverse guide, on which the yarn is hooked, in a predetermined traverse direction, and includes: a guide driving section that reciprocates the traverse guide in the traverse direction; and a control device that controls the yarn carrier driving section, the control device being capable of executing: a normal control for reversing the traverse guide at a predetermined standard position; and a creep control for reversing a creep position of the traverse guide within a creep region that is separated inward by a predetermined separation distance from the standard position, and setting which of the normal control and the creep control is to be executed for each reciprocation of the traverse guide.

A package production method according to the present invention is a package production method for producing a package by winding a yarn around a bobbin while reciprocating a traverse guide having the yarn hooked thereon in a predetermined traverse direction, the method comprising: a normal step of reversing the traverse guide at a predetermined standard position; and a creeping step of reversing a creeping position of the traverse guide in a creeping region that is separated inward by a predetermined separation distance from the standard position, and setting which of the normal step and the creeping step is to be executed for each reciprocation of the traverse guide.

In the present invention, during the creep control (or the creep step), the traverse guide is reversed at the creep position in the creep region which is separated from the standard position to the inside by a predetermined separation distance. That is, the traverse width can be made to be gradually narrowed or returned to the standard width at once without gradually decreasing and gradually increasing the traverse width at the time of the creep control (or the creep step). Therefore, if the separation distance is set appropriately, the yarn can be prevented from being wound in the range where the bulge is formed, and the bulge can be effectively eliminated by the creep control. In the present invention, it is possible to set which of the normal control (or the normal process) and the creep control (or the creep process) is to be executed for each reciprocating movement of the movable carrier. Therefore, by appropriately setting the frequency of executing the creep control (or the creep step), the winding layer formed during the creep control (or the creep step) can be reduced, and the formation of a level difference on the package surface can be prevented. As a result, yarn breakage can be prevented from occurring when the traverse width is returned to the standard width.

In the present invention, a plurality of the creep positions may be set in the creep region.

If the traverse guide is reversed at the same creep position every time the creep control is performed, a protrusion such as a convex edge may be formed near the creep position. In this regard, according to the above configuration, the reverse rotation position of the traverse guide can be dispersed to a plurality of positions during the creep control, and therefore, the formation of the protruding portion can be avoided.

In the present invention, the separation distance may be 10mm to 30 mm.

The formation of the bulge is often in a range of less than 10mm from the end of the package, although it is also based on the winding conditions. Thus, by separating the creep area by 10mm or more from the standard position, the convex edge can be more effectively eliminated by the creep control. On the other hand, if the traverse guide is reversed at a position too far inward during the creep control, the deviation from the winding trajectory when the traverse guide is reversed at the standard position becomes large, and there is a possibility that the appearance of the package is adversely affected. Therefore, by setting the separation distance to 30mm or less, the appearance of the package can be maintained well.

In the present invention, the width of the creeping region in the traverse direction may be 5mm to 20 mm.

If the creep area is too narrow, the creep position cannot be sufficiently dispersed in the creep area, and a protrusion such as a convex edge may be formed due to the creep control. Therefore, by setting the width of the creep region to 5mm or more, the creep positions can be sufficiently dispersed, and formation of the protruding portion can be avoided. On the other hand, if the creep area is too wide, the difference in winding trajectory increases depending on the creep position, and the appearance of the package may be adversely affected. Therefore, by setting the width of the creeping region to 20mm or less, the appearance of the package can be maintained well.

In the present invention, the ratio of the number of times of the creep control to the total number of times of the normal control and the creep control may be 10% or more and less than 50%.

If the number of execution times of the creep control is too small, the convex edge may not be eliminated. Therefore, by setting the execution ratio of the creep control to 10% or more, the bulge can be eliminated more reliably. On the other hand, from the viewpoint of package appearance, it is preferable to increase the number of times of execution of the normal control as much as possible. Therefore, by setting the execution ratio of the creep control to less than 50%, in other words, setting the execution ratio of the normal control to 50% or more, the appearance of the package can be maintained well.

In the present invention, the normal control may be executed immediately before and immediately after the creep control.

Thus, the creeping control is not continuously executed, and it is possible to more effectively prevent the level difference from being generated on the package surface by the creeping control. As a result, it is possible to more reliably prevent yarn breakage from occurring when the traverse width returns to the standard width.

In the present invention, the traverse guide may be attached to a belt member driven by the guide driving section.

According to such a belt type traverse device, it is preferable to use a lightweight belt member and a traverse guide because the influence of inertia can be reduced and the traverse guide can be inverted with high accuracy.

Drawings

Fig. 1 is a schematic view of the rewinding machine according to the present embodiment as viewed from the front.

Fig. 2 is a diagram showing an electrical configuration of the rewinding machine.

Fig. 3 is a schematic view showing the reverse position of the traverse guide according to the present embodiment.

Fig. 4 is a schematic view showing the operation of the traverse guide of the present embodiment.

Fig. 5 (a) is a view showing a flange formed on a conventional package, and (b) is a view showing a shape of the package when the creep control of the present embodiment is performed.

Fig. 6 is a schematic diagram showing the operation of a traverse guide of a conventional device.

Detailed Description

Next, embodiments of the present invention will be described with reference to the drawings. The vertical direction and the horizontal direction shown in fig. 1 are the vertical direction and the horizontal direction of the rewinder 1, respectively. A direction orthogonal to both the vertical direction and the horizontal direction (a direction perpendicular to the paper surface of fig. 1) is defined as a front-rear direction. The direction in which the yarn Y travels is referred to as the yarn travel direction.

(construction of rewinding machine)

First, the structure of the rewinding machine 1 (yarn winding machine of the present invention) according to the present embodiment will be described with reference to fig. 1. Fig. 1 is a schematic view of the rewinding machine 1 viewed from the front. As shown in fig. 1, the rewinder 1 includes a yarn feeding unit 11, a winding unit 12, a control device 13, and the like. The rewinder 1 unwinds the yarn Y from the yarn supply package Ps supported by the yarn supply section 11, and rewinds the yarn Y on a winding bobbin Bw (a bobbin of the present invention) by a winding section 12 to form a winding package Pw (a package of the present invention). More specifically, the rewinder 1 is used to rewind the yarn Y wound around the yarn supply package Ps more regularly, or to form a winding package Pw of a desired density, for example.

The yarn feeder 11 is mounted on the front surface of the lower part of the vertically-installed machine body 14, for example. The yarn feeding section 11 is configured to support a yarn feeding package Ps formed by winding the yarn Y around the yarn feeding bobbin Bs. Thereby, the yarn feeding portion 11 can feed the yarn Y.

The winding unit 12 winds the yarn Y around the winding bobbin Bw to form a winding package Pw. The winding unit 12 is provided at an upper portion of the machine body 14. The winding unit 12 includes a cradle arm 21, a winding motor 22, a traverse device 23, a contact roller 24, and the like.

The rocker arm 21 is supported by the body 14, for example, so as to be able to swing. The cradle arm 21 supports the winding bobbin Bw rotatably with the left-right direction as the axial direction of the winding bobbin Bw, for example. A bobbin holder (not shown) for holding the winding bobbin Bw is rotatably attached to a distal end portion of the cradle arm 21. The take-up motor 22 is used to rotationally drive the bobbin holder. The winding motor 22 is, for example, a general ac motor, and is configured to be capable of changing the rotation speed. Thereby, the winding motor 22 can change the rotation speed of the winding bobbin Bw. The winding motor 22 is electrically connected to the control device 13 (see fig. 2).

The traverse device 23 is a device for traversing the yarn Y in the axial direction (in the present embodiment, the left-right direction) of the winding bobbin Bw. The traverse device 23 is disposed immediately upstream of the winding package Pw in the yarn traveling direction. The traverse device 23 includes a traverse motor 31 (a guide driving section of the present invention), an endless belt 32 (a belt member of the present invention), and a traverse guide 33.

The traverse motor 31 is, for example, a general ac motor. The traverse motor 31 is a driving source configured to be capable of normal rotation driving and reverse rotation driving and configured to be capable of changing the rotation speed. The traverse motor 31 is electrically connected to the control device 13 (see fig. 2). The endless belt 32 is a belt member to which a traverse guide 33 is attached. The endless belt 32 is wound around a pulley 34 and a pulley 35 which are disposed apart from each other in the left-right direction, and a drive pulley 36 connected to the rotation shaft of the traverse motor 31, and is stretched in a substantially triangular shape. The endless belt 32 is reciprocally driven by the traverse motor 31. The traverse guide 33 is attached to the endless belt 32 and disposed between the pulley 34 and the pulley 35 in the left-right direction. The traverse motor 31 reciprocally drives the endless belt 32, thereby linearly reciprocating the traverse guide 33 in the left-right direction (see an arrow in fig. 1). Thereby, the traverse guide 33 traverses the yarn Y in the left-right direction. Hereinafter, the left-right direction is also referred to as a traverse direction. In the traverse device 23 having the above-described configuration, the length (traverse width) of the movement region of the traverse guide 33 can be changed in the winding operation of the yarn Y by controlling the timing of switching the rotational direction of the rotary shaft of the traverse motor 31 and the like.

The contact roller 24 is used to apply a contact pressure to the surface of the winding package Pw to adjust the shape of the winding package Pw. The contact roller 24 is in contact with the winding package Pw and rotates in accordance with the rotation of the winding package Pw.

A yarn guide 15, a guide roller 16, and a tension sensor 17 are arranged in this order from the upstream side between the yarn feeding unit 11 and the winding unit 12 in the yarn traveling direction. The yarn guide 15 is disposed, for example, on an extension of the central axis of the yarn supplying bobbin Bs, and guides the yarn Y unwound from the yarn supplying package Ps to the downstream side in the yarn traveling direction. The guide roller 16 is for guiding the yarn Y guided by the carrier 15 further toward the downstream side in the yarn traveling direction. The guide roller 16 is disposed on the front surface of the machine body 14 and above the yarn guide 15. The guide roller 16 is rotationally driven by, for example, a roller drive motor 18. The roller drive motor 18 is, for example, a general ac motor, and is configured to be capable of changing the rotation speed. Thereby, the roller drive motor 18 can change the rotation speed of the guide roller 16. The roller drive motor 18 is electrically connected to the control device 13 (see fig. 2). In the present embodiment, tension is applied to the yarn Y by the speed difference between the peripheral speed of the guide roller 16 and the peripheral speed of the winding package Pw.

The tension sensor 17 is disposed between the winding package Pw and the guide roller 16 in the yarn running direction, and detects the tension applied to the yarn Y. The tension sensor 17 is electrically connected to the control device 13 (see fig. 2), and transmits the detection result of the tension to the control device 13.

The control device 13 includes a CPU, a ROM, a RAM (storage unit 19), and the like. The storage unit 19 stores parameters such as the amount of yarn Y wound, the winding speed, and the strength of tension applied to the yarn Y. The control device 13 controls each unit by the CPU according to a program stored in the ROM based on parameters and the like stored in the RAM (storage unit 19).

In the rewinding machine 1 as described above, the yarn Y unwound from the yarn supply package Ps travels downstream in the yarn traveling direction. The running yarn Y is wound around the rotating winding bobbin Bw while traversing in the left-right direction (traverse direction) by the traverse guide 33.

(peristalsis)

In the winding section 12, when the winding speed is high (the rotational speed of the winding bobbin Bw is high) or the free length (the yarn Y between the traverse guide 33 and the winding package Pw) is long, it is difficult to reverse the yarn Y at an acute angle by the traverse guide 33. As a result, a large amount of the yarn Y is wound at both ends of the winding package Pw, and a protrusion called a "bulge" is formed at both ends of the winding package Pw (symbol M in fig. 5 a indicates a bulge). The raised edge is not preferable because it causes unevenness in the packing density, poor appearance, unwinding failure, and the like.

Therefore, in order to suppress the formation of the convex edge, the following configuration has been adopted in the past: the range of reciprocation of the traverse guide is changed by the cam mechanism, and the traverse guide is periodically reversed at a position inside the standard position. This reduces the amount of yarn wound around both ends of the package, thereby suppressing bulging. In this way, the operation of reversing the traverse guide at the position inside the standard position is referred to as "creeping".

Fig. 6 is a schematic diagram showing the operation of a traverse guide of a conventional device. As shown in fig. 6, the cam mechanism is a mechanism for gradually decreasing and gradually increasing the traverse width of the traverse guide during the creeping. However, since a considerable amount of the yarn is wound in the range where the raised edge is formed by gradually decreasing and gradually increasing the traverse width, the raised edge cannot be effectively eliminated. Further, since a considerable amount of the winding layer is formed during the creeping, a step is easily formed on the package surface, and when the traverse width is returned to the standard width, yarn breakage may occur.

Therefore, in the present embodiment, the control device 13 appropriately controls the traverse device 23 (specifically, the traverse motor 31) to suppress the occurrence of the raised edge and the yarn drop. Fig. 3 is a schematic view showing the reverse position of the traverse guide 33 according to the present embodiment. Fig. 4 is a schematic diagram illustrating the operation of the traverse guide 33 according to the present embodiment. In fig. 3, the reverse position of the left end in the traverse direction is shown, but as shown in fig. 4, the same reverse position is set for the right end.

In the present embodiment, as shown in fig. 3, the standard position Ts and the creep positions T1 to T4 are set as the reverse positions of the traverse guide 33. The standard position Ts is a reverse position in normal winding without creeping. On the other hand, the creep positions T1 to T4 are reverse positions set in a creep region C provided inside the standard position Ts in the traverse direction. The separation distance L between the standard position Ts and the creeping region C is preferably set so that the creeping region C is located inward of the range in which the flange is formed. Since the bulge is often formed within a range of less than 10mm from the end of the winding package Pw, the separation distance L is set to 20mm, for example, in the present embodiment. The reverse rotation position of the traverse guide 33 is not set in the region between the standard position Ts and the creep region C, and the traverse guide 33 does not reverse in this region.

When the traverse direction width of the creeping region C is W, the creeping positions T1 to T4 are set as follows. The creep position T1 is an end position outside the creep area C. The creep position T2 is a position separated inward by W/3 from the creep position T1. The creep position T3 is a position separated inward by W/3 from the creep position T2. The creep position T4 is an end position inside the creep area C. That is, the creep positions T1 to T4 are arranged at equal intervals. In the present embodiment, the width W of the creep region C is set to 10mm, for example.

In the present embodiment, after the standard position Ts and the creep positions T1 to T4 are set as described above, it is set which position of the traverse guide 33 is reversed between the standard position Ts and the creep positions T1 to T4 for each reciprocation of the traverse guide 33. The operator can set and store such setting items in the storage unit 19 by an input means not shown. In the following description, control for reversing the traverse guide 33 at the standard position Ts is referred to as normal control, and control for reversing the traverse guide 33 at the creep positions T1 to T4 is referred to as creep control.

In the example shown in fig. 3 and 4, the traverse guide 33 is reciprocated 12 times to form 1 cycle, and the mode of setting the reverse rotation position of the traverse guide 33 is repeated every 12 times of the traverse guide 33. In fig. 3 and 4, the number added to the dot indicating the reverse position means the number of times the traverse guide 33 reciprocates in a certain cycle. The control of the traverse guide 33 in a certain cycle will be described below.

During the 1 st and 2 nd reciprocations of the traverse guide 33, normal control is performed to reverse the traverse guide 33 at the standard position Ts. In the next 3 rd traverse, the traverse control is performed to reverse the traverse guide 33 at the traverse position T1. Hereinafter, the same control is repeated every 3 times of reciprocating movement, but the reverse rotation positions in the creep control are different from each other. That is, the traverse guide 33 is reversed at the creep position T2 in the 6 th traverse, the traverse guide 33 is reversed at the creep position T3 in the 9 th traverse, and the traverse guide 33 is reversed at the creep position T4 in the 12 th traverse.

As described above, in the present embodiment, during the creep control, the reverse position of the traverse guide 33 is changed to the creep positions T1 to T4 in the creep region C at a stroke, instead of gradually changing the reverse position toward the creep region C. Therefore, during the creep control, winding of the yarn Y between the standard position Ts and the creep region C, that is, within a range where the bulge is originally formed, can be avoided as much as possible, and the winding package Pw in which the bulge is suppressed can be formed as shown in fig. 5 (b).

Further, by changing the reverse rotation position of the traverse guide 33 to the creep positions T1 to T4 at a time during the creep control, the number of times of the normal control can be increased by effectively suppressing the bulge even when the number of times of the creep control is small. For example, in the present embodiment, 2 of 3 reciprocating movements of the traverse guide 33 are set as the normal control and 1 is set as the creep control, and therefore the execution ratio of the creep control is 33%. In the conventional apparatus, as shown in fig. 6, the execution time of the creeping tends to be long, and therefore the appearance of the package is liable to deteriorate. On the other hand, according to the present invention, since the creep control is reduced and the normal control is increased, the appearance of the winding package Pw can be maintained favorably.

(Effect)

In the present embodiment, it is possible to set which of the normal control for reversing the traverse guide 33 at the standard position Ts and the creep control for reversing the traverse guide 33 at the creep positions T1 to T4 in the creep region C separated inward by the separation distance L from the standard position Ts can be executed for each reciprocation of the traverse guide 33. That is, the traverse width is not gradually decreased and gradually increased in the creep control, but the traverse width can be made to be gradually narrowed or returned to the standard width. Therefore, if the separation distance L is set appropriately, the yarn Y can be prevented from being wound in the range where the bulge is formed, and the bulge can be effectively eliminated by the creep control. Further, by appropriately setting the frequency of executing the creep control, the winding layer formed at the time of the creep control can be reduced, and the occurrence of a level difference on the package surface can be prevented. As a result, yarn breakage can be prevented from occurring when the traverse width is returned to the standard width.

In the present embodiment, a plurality of creep positions T1 to T4 are set in the creep region C. If the traverse guide 33 is reversed at the same creep position every time the creep control is performed, a protrusion such as a convex edge may be formed near the creep position. In this regard, according to the above configuration, the reverse rotation position of the traverse guide 33 can be dispersed to a plurality of positions during the creep control, and therefore, the formation of the protruding portion can be avoided.

In the present embodiment, the separation distance L is set to 20mm, that is, a distance of 10mm to 30 mm. The formation of the bulge is often within a range of less than 10mm from the end of the winding package Pw, although it is also based on the winding conditions. Thus, by separating the creep area C by 10mm or more from the standard position Ts, the convex edge can be more effectively eliminated by the creep control. On the other hand, if the traverse guide 33 is reversed at a position too far inward during the creep control, the deviation from the winding trajectory when the traverse guide is reversed at the standard position Ts becomes large, and there is a possibility that the appearance of the winding package Pw is adversely affected. Therefore, by setting the separation distance L to 30mm or less, the appearance of the winding package Pw can be maintained well.

In the present embodiment, the width of the creeping region C in the traverse direction is set to 10mm, that is, a width of 5mm to 20 mm. If the creep area C is too narrow, the creep positions T1 to T4 cannot be sufficiently dispersed in the creep area C, and there is a possibility that a protrusion like a convex edge is formed due to the creep control. Therefore, by setting the width W of the creep region C to 5mm or more, the creep positions T1 to T4 can be sufficiently dispersed, and formation of a protrusion can be avoided. On the other hand, if the creep area C is too wide, the difference in the winding trajectory increases depending on the creep positions T1 to T4, and the appearance of the winding package Pw may be adversely affected. Therefore, by setting the width W of the creeping region C to 20mm or less, the appearance of the winding package Pw can be maintained well.

In the present embodiment, the ratio of the number of times of creep control to the total number of times of normal control and creep control is set to 33%, that is, to a ratio of 10% or more and less than 50%. If the number of execution times of the creep control is too small, the convex edge may not be eliminated. Therefore, by setting the execution ratio of the creep control to 10% or more, the bulge can be eliminated more reliably. On the other hand, from the viewpoint of the appearance of the winding package Pw, it is preferable to increase the number of times of execution of the normal control as much as possible. Therefore, by setting the execution ratio of the creep control to less than 50%, in other words, setting the execution ratio of the normal control to 50% or more, the appearance of the package Pw can be maintained well.

In the present embodiment, the normal control is executed immediately before and immediately after the creep control. Thus, the creeping control is not continuously executed, and therefore, the step formed on the package surface by the creeping control can be more effectively prevented. As a result, it is possible to more reliably prevent yarn breakage from occurring when the traverse width returns to the standard width.

In the present embodiment, the traverse guide 33 is attached to an endless belt 32 (belt member) driven by a traverse motor 31 (guide driving section). According to the belt type traverse device 23, it is preferable to use the lightweight endless belt 32 and the traverse guide 33 because the influence of inertia can be reduced and the traverse guide 33 can be inverted with high accuracy.

(other embodiments)

A modification example in which various modifications are applied to the above embodiment will be described.

In the above embodiment, 4 creep positions T1 to T4 are set at equal intervals. However, how to set the creep position in the creep region C can be appropriately changed. For example, only one creep position may be set, or a plurality of creep positions may be set at unequal intervals.

In the above embodiment, the separation distance L between the standard position Ts and the creep area C is 10mm to 30 mm. However, the separation distance L may be made smaller than 10mm, or may be made larger than 30 mm.

In the above embodiment, the width W of the creep area C is 5mm to 20 mm. However, the width W of the creeping area C may be made smaller than 5mm, or may be made larger than 20 mm.

In the above embodiment, the execution ratio of the creep control is 10% or more and less than 50%. However, the execution ratio of the creep control may be set to less than 10%, or may be set to 50% or more.

In the above embodiment, as shown in fig. 3, the reverse rotation position of the traverse guide 33 is changed periodically. However, how the reverse position is set for each reciprocation of the traverse guide 33 can be changed as appropriate. For example, the creep control may be continuously executed, or the reverse position of the traverse guide 33 may be randomly changed. However, in the case of random setting, it is preferable to set the execution ratio of the creep control in advance.

The traverse device 23 of the above embodiment is a so-called belt type traverse device in which a traverse guide 33 is attached to an endless belt 32. However, the specific configuration of the traverse device is not limited to this. For example, as described in japanese patent application laid-open No. 2007-153554, a traverse guide may be attached to a distal end of an arm that is driven to swing. Further, the traverse guide may be driven to reciprocate by a linear motor.

In the above embodiment, the yarn winding machine of the present invention is applied to the rewinder 1, but the present invention may be applied to other yarn winding machines.

Description of the symbols

1: rewinding machines (yarn winding machines); 13: a control device; 31: a traverse motor (a yarn guide driving section); 32: an endless belt (belt member); 33: a traverse guide; y: a yarn; bw: a winding bobbin (bobbin); pw: winding a package (package); ts: a standard position; T1-T4: a peristaltic position; c: a peristaltic region; l: a separation distance; w: the width of the peristaltic region.