JP2022112481A - Guide body, and yarn winder - Google Patents

Abstract

To provide a guide body capable of suppressing change in yarn quality at low cost.SOLUTION: A guide body 16 comprises a support point guide 31 that becomes a support point when winding yarn around a bobbin while traversing the yarn. The support point guide 31 has a cylindrical shape and is rotatable around a central axis. The guide body 16 is provided with rotational resistance application means 37 for applying a rotational resistance to the support point guide 31 so that when the support point guide 31 receives a predetermined value or more of torque from the yarn traveling while coming into contact with an outer peripheral surface of the support point guide 31, the support point guide 31 is driven to rotate at a peripheral speed slower than a travelling speed of the yarn.SELECTED DRAWING: Figure 3

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide body having a fulcrum guide that serves as a fulcrum when a yarn is traversed and wound around a bobbin, and a yarn winding machine provided with the guide body.

BACKGROUND ART Conventionally, a yarn winding machine is known that winds a yarn spun from a spinning device around a bobbin while traversing it. Such a yarn winding machine is provided with a fulcrum guide that serves as a fulcrum when the yarn is traversed. For example, in Patent Documents 1 and 2, a cylindrical fulcrum guide (a guide roller in Patent Document 2) is provided, and a thread is wound around the outer peripheral surface of the fulcrum guide.

In Patent Literature 1, the fulcrum guide is configured so as not to rotate around the central axis when the line is wound. For this reason, the yarn traveling at high speed continues to contact the same portion of the outer peripheral surface of the fulcrum guide, and local wear tends to progress in the fulcrum guide. As a result, the state of contact between the yarn and the fulcrum guide changes, possibly resulting in deterioration of the quality of the yarn. Therefore, in Patent Document 1, the fulcrum guide is configured to be rotatable by a motor, and the contact position with the yarn can be changed. However, in Patent Literature 1, there is a problem that the cost increases because a drive unit such as a motor for rotating the fulcrum guide is required.

On the other hand, in Patent Document 2, the fulcrum guide is a roller that can freely rotate around the central axis. Therefore, the fulcrum guide always rotates due to friction with the yarn during yarn winding, and local wear can be suppressed. In addition, by using a freely rotatable roller, a drive unit for rotating the fulcrum guide is not required, and costs can be reduced.

JP 2013-23787 A Japanese Patent Publication No. 2008-531438

However, Patent Document 2 requires a precise bearing structure so that the fulcrum guide can withstand high-speed rotation. The precision bearing structure is prone to deterioration, and as a result, the rotation speed of the fulcrum guide is reduced during winding of the yarn, which may lead to unintended changes in yarn quality.

In view of the above problems, an object of the present invention is to provide a guide body capable of suppressing changes in yarn quality at low cost.

The present invention is a guide body having a fulcrum guide that serves as a fulcrum when winding a yarn on a bobbin while traversing it, wherein the fulcrum guide has a cylindrical shape and is rotatable around a central axis, and the fulcrum is The fulcrum guide is configured such that when the guide receives a torque of a predetermined value or more from the yarn running in contact with the outer peripheral surface of the fulcrum guide, the guide is driven to rotate at a peripheral speed slower than the running speed of the yarn. A rotational resistance imparting means for imparting rotational resistance is provided.

According to the present invention, the fulcrum guide is driven to rotate when it receives a torque of a predetermined value or more from the yarn, so that the portion of the outer peripheral surface of the fulcrum guide that the yarn contacts can be changed, and the local Wear can be suppressed. Moreover, since a drive unit such as a motor for rotating the fulcrum guide is not required, costs can be reduced. Furthermore, by rotating the fulcrum guide at a peripheral speed slower than the running speed of the yarn by means of the rotation resistance imparting means, the frictional characteristics between the fulcrum guide and the yarn are substantially constant, almost unchanged from the case where the fulcrum guide is fixed. becomes. Therefore, even if the number of revolutions of the fulcrum guide fluctuates to some extent, the resulting change in yarn quality can be suppressed. As described above, according to the present invention, it is possible to suppress changes in yarn quality at low cost.

In the present invention, the rotational resistance imparting means imparts rotational resistance to the fulcrum guide so that the peripheral speed of the fulcrum guide is preferably 5% or less, more preferably 3.5% or less of the running speed of the yarn. do it.

If the circumferential speed of the fulcrum guide is sufficiently slow at 5% or less of the running speed of the yarn, the change in yarn quality can be suppressed more effectively.

In the present invention, the rotational resistance imparting means preferably imparts rotational resistance to the fulcrum guide so that the rotational speed of the fulcrum guide is preferably 7400 rpm or less, more preferably 5000 rpm or less.

If the number of rotations of the fulcrum guide is high, the fulcrum guide and other members in contact with the fulcrum guide are likely to be worn, which may hinder the smooth rotation of the fulcrum guide. Therefore, as described above, by reducing the rotation speed of the fulcrum guide to 7400 rpm or less, it is possible to suppress wear of the fulcrum guide and other members in contact with the fulcrum guide, and to maintain smooth rotation of the fulcrum guide. can do.

In the present invention, the rotation resistance imparting means preferably has a pressed portion disposed on one side of the fulcrum guide in the axial direction, and a pressing member that presses the fulcrum guide toward the pressed portion.

According to such a configuration, it is possible to apply rotational resistance to the fulcrum guide by the pressing force of the pressing member.

In the present invention, an intervening member may be arranged between the fulcrum guide and the pressed portion and/or between the fulcrum guide and the pressing member.

With such a configuration, it is possible to adjust the pressing force acting on the fulcrum guide according to the shape, size, material, etc. of the intervening member, making it easier to adjust the rotational speed and peripheral speed of the fulcrum guide.

In the present invention, the intervening member preferably has a thrust bearing portion that contacts an end surface of the fulcrum guide, and a radial bearing portion that contacts an inner peripheral surface of the fulcrum guide.

By providing the thrust bearing portion and the radial bearing portion in the intervening member, the fulcrum guide can be rotated more smoothly.

In the present invention, the pressing member may be a spring.

By using a spring as the pressing member, it becomes easier to adjust the pressing force acting on the fulcrum guide, and it becomes easier to adjust the rotational speed and peripheral speed of the fulcrum guide.

In the present invention, it is preferable that the pushed portion is formed integrally with a shaft member that rotatably supports the fulcrum guide.

With such a configuration, the guide body can be manufactured with a small number of parts.

In the present invention, the rotational resistance imparting means is a contact portion formed between another member in contact with the fulcrum guide and the fulcrum guide. It is preferable that the frictional force is adjusted so as to be slower than the running speed of the

With such a configuration, the above-mentioned pressing member becomes unnecessary, and the guide body can be manufactured with a small number of parts.

In the present invention, the contact portion as the rotational resistance imparting means may be formed between the inner peripheral surface of the fulcrum guide and another member that contacts the inner peripheral surface of the fulcrum guide.

Since the inner peripheral surface of the fulcrum guide generally has a larger area than the end surface, the frictional force can be easily adjusted by using the inner peripheral surface of the fulcrum guide as a means for providing rotational resistance.

In the present invention, an intervening member is arranged between a shaft member that rotatably supports the fulcrum guide and the fulcrum guide, and the contact portion as the rotation resistance imparting means is an inner peripheral surface of the fulcrum guide. and the intervening member.

According to such a configuration, it is possible to adjust the frictional force at the contact portion by changing the shape, size, material, etc. of the intervening member, making it easier to adjust the rotational speed and peripheral speed of the fulcrum guide.

The present invention is a yarn winding machine for winding a plurality of yarns onto a plurality of bobbins mounted on a winding shaft, wherein a plurality of the guide bodies are arranged in the axial direction of the winding shaft. Characterized by

According to such a yarn winding machine, changes in yarn quality can be suppressed at low cost.

1 is a side view of a spinning take-up device according to this embodiment; FIG. It is a side view of a guide unit. It is a sectional view of a guide body. It is a figure which shows the verification experiment result of a yarn physical property. It is a sectional view of a guide object concerning a modification. It is a figure which shows the verification experiment result in a modification.

Hereinafter, an embodiment in which a yarn winder having a guide body according to the present invention is applied to a yarn take-up device will be described with reference to the drawings.

(Spinning take-up device)
FIG. 1 is a side view of a spinning take-up device 1 according to this embodiment. In this specification, the front, rear, left, right, up, and down directions shown in FIG.

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

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

The turret 12 is a disk-shaped member having a rotation axis parallel to the front-rear direction, and bobbin holders 13 are attached to upper and lower positions that are 180 degrees apart in the circumferential direction. By rotating the turret 12, the two bobbin holders 13 are moved between upper and lower positions. The bobbin holder 13 at the upper position winds a plurality of yarns Y onto a plurality of bobbins B to form a plurality of packages P. As shown in FIG. On the other hand, in the lower bobbin holder 13, a plurality of packages P are collected and a plurality of new bobbins B are mounted.

The yarn winding machine 10 has a support frame 14 that is cantilevered on a machine base 11 . The support frame 14 is supported by the machine base 11 at its rear end. A guide unit 15 is arranged above the support frame 14 . The guide unit 15 is provided with the same number of guide bodies 16 as the number of yarns Y arranged side by side in the front-rear direction. The support frame 14 is provided with the same number of traverse devices 17 as the number of yarns Y arranged side by side in the front-rear direction. The traverse device 17 traverses the yarn Y in the front-rear direction with the corresponding guide body 16 as a fulcrum.

A contact roller 18 rotatably supported by the support frame 14 is arranged below the support frame 14 . The contact roller 18 contacts the outer peripheral surfaces of the packages P held by the upper bobbin holder 13 . When the yarn is wound, the contact roller 18 rotates while applying a predetermined contact pressure to the package P, so that the shape of the package P can be adjusted.

(Guide unit)
A configuration of the guide unit 15 will be described. 2 is a side view of the guide unit 15. FIG. FIG. 2a shows a state in which the plurality of guide bodies 16 are positioned at the winding position, and FIG. 2b shows a state in which the plurality of guide bodies 16 are positioned at the yarn hooking position. The winding position is the position of the plurality of guide bodies 16 when winding the plurality of yarns Y onto the plurality of bobbins B. As shown in FIG. The yarn hooking position is the position of the plurality of guide bodies 16 when the plurality of yarns Y are hooked on the plurality of guide bodies 16 . The plurality of guide bodies 16 are configured to be movable between the winding position and the yarn hooking position.

The guide unit 15 has multiple guide bodies 16 , multiple sliders 21 , guide rails 22 , and air cylinders 23 . The same number of sliders 21 as the guide bodies 16 are provided, and each guide body 16 is attached to the corresponding slider 21 . The guide rail 22 is a member extending in the front-rear direction, and is fixed to the support frame 14 via a bracket (not shown). A plurality of sliders 21 are slidably attached to the guide rails 22 while being aligned in the front-rear direction. The sliders 21 adjacent to each other are connected by a belt (not shown). The air cylinder 23 is a driving device for moving the plurality of guide bodies 16 between the winding position and the yarn hooking position. A rod 23 a of the air cylinder 23 is connected to the rearmost slider 21 . The driving device for moving the guide bodies 16 is not limited to the air cylinder 23, and may be another actuator such as a motor.

As shown in FIG. 2a, when the rod 23a of the air cylinder 23 is contracted, the sliders 21 are spaced apart from each other and arranged in the longitudinal direction. The position of the plurality of guide bodies 16 at this time is the winding position. On the other hand, as shown in FIG. 2b, when the rod 23a of the air cylinder 23 is extended, the plurality of sliders 21 gather at the front end of the guide rail 22. As shown in FIG. The position of the plurality of guide bodies 16 at this time is the yarn hooking position.

As shown in FIG. 2a, the yarn paths of the plurality of yarns Y distributed from the godet roller 4 to the plurality of guide bodies 16 positioned at the take-up position extend vertically through the centers of the plurality of guide bodies 16 in the front-rear direction. It is substantially symmetrical with respect to the plane. The eight yarns Y in the front half are hung on the front side of the guide body 16 , while the eight yarns Y in the rear half are hung on the rear side of the guide body 16 . Further, among the plurality of guide bodies 16, the closer to the end, the larger the contact angle (wrapping angle) with the yarn Y, and the closer to the center, the smaller the contact angle (wrapping angle) with the yarn Y.

(Guide body)
Details of the guide body 16 will be described. FIG. 3 is a cross-sectional view of the guide body 16. As shown in FIG. The guide body 16 has a fulcrum guide 31 , a fixed member 32 and a shaft member 33 . The fulcrum guide 31 has a cylindrical shape extending in the left-right direction, and is rotatably supported by the shaft member 33 around the central axis. The yarn Y is hung on the outer peripheral surface of the fulcrum guide 31, and travels while being in contact with the outer peripheral surface of the fulcrum guide 31 during yarn winding. When the fulcrum guide 31 receives a torque of a predetermined value or more from the yarn Y running in contact with the outer peripheral surface of the fulcrum guide 31, the fulcrum guide 31 is driven to rotate at a peripheral speed slower than the running speed of the yarn Y.

The fixing member 32 has a cylindrical small diameter portion 32a and a cylindrical large diameter portion 32b. The small-diameter portion 32 a is inserted into a circular mounting hole 21 a formed in the slider 21 . An annular recess 32c is formed at the right end of the large diameter portion 32b. A spring 36 (a pressing member of the present invention) is arranged in the recess 32c. The fixing member 32 is formed with a female threaded portion 32d penetrating in the left-right direction. The fixed member 32 is fixed to the slider 21 with a bolt (not shown) with the small diameter portion 32a inserted from the right side of the mounting hole 21a and the flange surface of the large diameter portion 32b in contact with the slider 21. As shown in FIG.

The shaft member 33 is a member in which a shaft portion 33a and a flange portion 33b (pressed portion of the present invention) are integrally formed. The shaft portion 33a has a cylindrical shape extending in the left-right direction. The shaft portion 33a rotatably supports the fulcrum guide 31 fitted on the shaft portion 33a. The flange portion 33b is an annular portion extending radially outward of the shaft portion 33a from the right end portion of the shaft portion 33a. A through hole 33c is formed through the shaft member 33 in the left-right direction. The right end portion of the through hole 33c has a tapered surface 33d with which the head portion of the bolt 39 contacts.

Interposed members 34 and 35 made of resin are arranged adjacent to the fulcrum guide 31 on both sides of the fulcrum guide 31 in the axial direction. The intervening members 34 and 35 are annular members having an L-shaped cross section, and include thrust bearing portions 34a and 35a extending in the radial direction of the fulcrum guide 31 and radial bearing portions 34b and 35b extending in the axial direction of the fulcrum guide 31. and By providing such resin-made intervening members 34 and 35, wear of the fulcrum guide 31 and the shaft member 33 can be suppressed. For example, POM (polyacetal) is used for the intervening members 34 and 35 .

The thrust bearing portion 34a of the right interposed member 34 is arranged between the fulcrum guide 31 and the flange portion 33b of the shaft member 33 in the axial direction of the fulcrum guide 31, and is in contact with the right end surface of the fulcrum guide 31. . The thrust bearing portion 35 a of the left intervening member 35 is arranged between the fulcrum guide 31 and the spring 36 in the axial direction of the fulcrum guide 31 and abuts on the left end surface of the fulcrum guide 31 . The radial bearing portions 34 b and 35 b are arranged between the fulcrum guide 31 and the shaft portion 33 a of the shaft member 33 in the radial direction of the fulcrum guide 31 and are in contact with the inner peripheral surface of the fulcrum guide 31 .

When the fulcrum guide 31 is fitted onto the shaft member 33, the bolt 39 is inserted into the through hole 33c and tightened to the female threaded portion 32d of the fixing member 32, whereby the shaft member 33 is fixed to the fixing member 32. . At this time, the fulcrum guide 31 is pressed toward the flange portion 33b by the biasing force of the spring 36 arranged in the concave portion 32c of the fixing member 32. As shown in FIG.

Conventionally, in order to prevent the yarn from continuing to contact the same portion of the outer peripheral surface of the fulcrum guide and progressing local wear of the fulcrum guide, it is possible to freely rotate, that is, at a peripheral speed approximately the same as the running speed of the yarn. Rotatable fulcrum guides were often used. However, when a freely rotatable fulcrum guide is used, a precise bearing structure such as a ball bearing is required, and as the bearing structure deteriorates, the number of rotations of the fulcrum guide may decrease during yarn winding. . As a result, the yarn quality may change unintentionally.

In order to avoid such a change in yarn quality, in this embodiment, a rotational resistance imparting means 37 that imparts rotational resistance to the fulcrum guide 31 so that the peripheral speed of the fulcrum guide 31 is slower than the running speed of the yarn Y is provided. is provided. The rotation resistance imparting means 37 is adjusted so that the fulcrum guide 31 is driven to rotate at a peripheral speed slower than the running speed of the yarn Y when the fulcrum guide 31 receives a torque equal to or greater than a predetermined value from the yarn Y. Specifically, the rotation resistance imparting means 37 is configured by the spring 36 and the flange portion 33b of the shaft member 33. As shown in FIG. Since the spring 36 presses the fulcrum guide 31 toward the flange portion 33b, the frictional resistance increases when the fulcrum guide 31 rotates, and rotation resistance can be applied. As a result, the rotational speed of the fulcrum guide 31 can be reduced.

The magnitude of rotational resistance applied to the fulcrum guide 31 can be adjusted by changing the intervening members 34 , 35 or the spring 36 . Alternatively, a spacer may be provided at an appropriate position between the recessed portion 32c of the fixing member 32 and the flange portion 33b of the shaft member 33 to adjust the biasing force of the spring 36. The rotational resistance imparting means 37 adjusts the peripheral speed of the fulcrum guide 31 to preferably 5% or less, more preferably 3.5% or less of the running speed of the yarn Y. Alternatively, the rotational resistance imparting means 37 adjusts the rotational speed of the fulcrum guide 31 to preferably 7400 rpm or less, more preferably 5000 rpm or less.

By slowly rotating the fulcrum guide 31 at a low speed, the frictional characteristics between the fulcrum guide 31 and the yarn Y become substantially constant, almost the same as when the fulcrum guide 31 is fixed. Therefore, even if the number of revolutions of the fulcrum guide 31 slightly fluctuates during winding of the yarn Y, it is possible to avoid a large change in yarn quality. Furthermore, when the rotational speed of the fulcrum guide 31 is small, a precise bearing structure such as a ball bearing is not required, and a simple bearing structure such as a slide bearing is sufficient, so there is a secondary effect of further reducing costs. .

In addition, in the guide body 16 having a large contact angle (wrapping angle) with the yarn Y (the one near the end among the plurality of guide bodies 16, see FIG. 2), the frictional force between the yarn Y and the fulcrum guide 31 is big. Therefore, the torque acting on the fulcrum guide 31 from the beginning exceeds the above-described predetermined value, and the fulcrum guide 31 is often driven to rotate at a circumferential speed slower than the running speed of the yarn Y. However, in the guide body 16 having a small contact angle (wrapping angle) with the yarn Y (the one near the center among the plurality of guide bodies 16, see FIG. 2), the frictional force between the yarn Y and the fulcrum guide 31 is small. Therefore, the torque acting on the fulcrum guide 31 may not exceed the predetermined value. However, this is not a particular problem.

If the torque acting on the fulcrum guide 31 due to the frictional force with the yarn Y does not reach the above-described predetermined value, that is, if the fulcrum guide 31 does not rotate due to the running of the yarn Y, the yarn Y will be pulled from the outer peripheral surface of the fulcrum guide 31. Continued contact with the same part causes local wear. When the fulcrum guide 31 wears, the frictional force with the yarn Y increases, the torque acting on the fulcrum guide 31 reaches the predetermined value, and the fulcrum guide 31 rotates slightly. Then, when the yarn Y comes into contact with the unworn portion of the fulcrum guide 31, the fulcrum guide 31 stops rotating again. Even with such behavior of the fulcrum guide 31, the change in yarn quality caused by the continued contact of the yarn Y with the worn portion of the fulcrum guide 31 can be suppressed.

(Verification experiment of yarn properties)
An experiment was conducted to verify whether or not the guide body 16 of the present embodiment can actually suppress the change in yarn quality. Specifically, when the fulcrum guide 31 is driven to rotate by the running of the yarn Y in a state in which the rotation resistance is applied by the rotation resistance applying means 37, the physical property values such as the tension, strength, and elongation of the yarn Y change. It was verified whether it would be larger than when the fulcrum guide 31 was fixed. The thickness of the thread Y used in the experiment is 83 dtex, and the outer diameter of the fulcrum guide 31 is 10 mm. When the running speed of the yarn Y was set to 4600 m/min, the rotational speed of the fulcrum guide 31 was 120 rpm and the peripheral speed was 3.8 m/min (0.08% of the running speed of the yarn Y).

FIG. 4 is a diagram showing results of verification experiments for yarn physical properties. The numbers in each bar graph indicate the average value, and for strength and elongation the variability is also shown along with the bar graph. “No rotation” indicates the case where the fulcrum guide 31 is fixed, and “with rotation” indicates the case where the fulcrum guide 31 is driven to rotate while the rotation resistance is applied by the rotation resistance applying means 37 . There was almost no difference in any of the yarn physical properties from the case where the fulcrum guide 31 was fixed, and variations in yarn quality were suppressed. From these experimental results, it can be said that it is possible to suppress the change in yarn quality during yarn winding by applying rotational resistance to the fulcrum guide 31 and rotating it at a low speed. It should be noted that the scope of application of the present invention is not limited to the scope in which the effects have been verified in this verification experiment. For example, if the peripheral speed of the fulcrum guide 31 is about 5% or less of the running speed of the yarn Y, the change in yarn quality during yarn winding can be sufficiently suppressed. Under the conditions of this verification experiment, when the circumferential speed of the fulcrum guide 31 is 5% of the running speed of the yarn Y, the rotational speed of the fulcrum guide 31 is approximately 7400 rpm.

(effect)
In this embodiment, the fulcrum guide 31 is driven to rotate when it receives a torque equal to or greater than a predetermined value from the yarn Y. Therefore, the portion of the outer peripheral surface of the fulcrum guide 31 that is in contact with the yarn Y can be changed. local wear can be suppressed. Moreover, since a drive unit such as a motor for rotating the fulcrum guide 31 is not required, costs can be reduced. Furthermore, by rotating the fulcrum guide 31 at a peripheral speed slower than the running speed of the yarn Y by means of the rotation resistance imparting means 37, the frictional characteristics between the fulcrum guide 31 and the yarn Y can be changed from the case where the fulcrum guide 31 is fixed. It becomes almost constant with almost no change. Therefore, even if the number of revolutions of the fulcrum guide 31 fluctuates to some extent, the resulting change in yarn quality can be suppressed. Therefore, it is possible to suppress changes in yarn quality at low cost.

In this embodiment, the rotational resistance imparting means 37 applies rotational resistance to the fulcrum guide 31 so that the peripheral speed of the fulcrum guide 31 is preferably 5% or less, more preferably 3.5% or less of the running speed of the yarn Y. Granted. If the peripheral speed of the fulcrum guide 31 is sufficiently slow at 5% or less of the running speed of the yarn Y, the change in yarn quality can be suppressed more effectively.

In this embodiment, the rotational resistance imparting means 37 imparts rotational resistance to the fulcrum guide 31 so that the rotational speed of the fulcrum guide 31 is preferably 7400 rpm or less. If the number of rotations of the fulcrum guide 31 is high, the fulcrum guide 31 and other members in contact with the fulcrum guide 31 are likely to wear out, which may hinder the smooth rotation of the fulcrum guide 31 . Therefore, as described above, by reducing the number of revolutions of the fulcrum guide 31 to 7400 rpm or less, it is possible to suppress the wear of the fulcrum guide 31 and other members in contact with the fulcrum guide 31, so that the fulcrum guide 31 can be smoothly rotated. can sustain a steady rotation.

In this embodiment, the rotation resistance imparting means 37 includes a flange portion 33b (pressed portion) disposed on one side of the fulcrum guide 31 in the axial direction, and a spring 36 (pressing portion) that presses the fulcrum guide 31 toward the flange portion 33b. member) and According to such a configuration, it is possible to apply rotational resistance to the fulcrum guide 31 by the pressing force of the spring 36 .

In this embodiment, intervening members 34 and 35 are arranged between the fulcrum guide 31 and the flange portion 33 b and between the fulcrum guide 31 and the spring 36 . With such a configuration, it is possible to adjust the pressing force acting on the fulcrum guide 31 according to the shape, size, material, etc. of the intervening members 34 and 35 , making it easier to adjust the rotational speed and peripheral speed of the fulcrum guide 31 .

In this embodiment, the intervening members 34 and 35 have thrust bearing portions 34 a and 35 a contacting the end faces of the fulcrum guide 31 and radial bearing portions 34 b and 35 b contacting the inner peripheral surface of the fulcrum guide 31 . By providing the thrust bearing portions 34a, 35a and the radial bearing portions 34b, 35b in the intervening members 34, 35, the fulcrum guide 31 can be rotated more smoothly.

In this embodiment, the pressing member is a spring 36 . By using the spring 36 as the pressing member, the pressing force acting on the fulcrum guide 31 can be easily adjusted, and the rotational speed and peripheral speed of the fulcrum guide 31 can be easily adjusted.

In this embodiment, the shaft member 33 that rotatably supports the fulcrum guide 31 is integrally formed with the flange portion 33b. With such a configuration, the guide body 16 can be manufactured with a small number of parts.

(Other embodiments)
Modifications in which various modifications are made to the above embodiment will be described.

In the above embodiment, the shaft portion 33a and the flange portion 33b corresponding to the pressed portion of the present invention are integrally formed on the shaft member 33 of the present invention. However, the pressed portion of the present invention may be configured as a member separate from the shaft portion 33a. Moreover, the shaft portion 33 a may be configured integrally with the fixing member 32 . In this case, the fixed member 32 corresponds to the shaft member of the present invention.

In the embodiment described above, the pressing member of the present invention is configured by the spring 36 . However, it is also possible to configure the pressing member with an elastic body such as an O-ring.

In the above embodiment, the spring 36 is arranged in the concave portion of the fixing member 32 . However, the arrangement of the springs 36 is not limited to this. For example, the spring 36 may be arranged between the fulcrum guide 31 and the flange portion 33b. In this case, the fixing member 32 functions as the pressed portion of the present invention.

In the above embodiment, the intervening members 34 and 35 are provided. However, the intervening members 34 and 35 may be omitted, or only one of the intervening members 34 and 35 may be provided. Further, the specific shapes and materials of the intervening members 34 and 35 are not limited to those of the above embodiments.

In the above embodiment, the plurality of guide bodies 16 are movable between the winding position and the yarn hooking position. However, it is not essential to configure the plurality of guide bodies 16 to be movable.

In the above-described embodiment, the rotation resistance imparting means 37 is composed of the spring 36 and the flange portion 33b. However, the specific configuration of the rotation resistance imparting means is not limited to this. FIG. 5 is a cross-sectional view of a guide body 16 according to a modification. In this modified example, the rotational resistance imparting means is constituted by the contact portions 41 and 42 between the fulcrum guide 31 and the intervening members 34 and 35 that contact the fulcrum guide 31 . A detailed description will be given below.

The contact portions 41 and 42 are formed between the inner peripheral surface of the fulcrum guide 31 and the radial bearing portions 34b and 35b of the intervening members 34 and 35, respectively. The frictional force at the contact portions 41 and 42 is adjusted so that the circumferential speed of the fulcrum guide 31 is slower than the running speed of the yarn Y when the fulcrum guide 31 is driven to rotate by the running of the yarn Y. Both end surfaces of the fulcrum guide 31 and the thrust bearing portions 34a, 35a of the intervening members 34, 35 are in loose contact with each other to the extent that almost no frictional resistance is generated. However, instead of the contact portions 41 and 42 between the inner peripheral surface of the fulcrum guide 31 and the radial bearing portions 34b and 35b, instead of or in addition to this, the end surface of the fulcrum guide 31 and the thrust bearing portions 34a and 35a A contact portion formed between may function as a rotational resistance imparting means. Alternatively, the intervening members 34 and 35 may be omitted, and the contact portion between the fulcrum guide 31 and the shaft member 33 may function as the rotation resistance imparting means.

Using the guide body 16 of this modified example, an experiment was conducted to verify whether or not a change in yarn quality can actually be suppressed. Specifically, when the fulcrum guide 31 is driven to rotate by the running of the yarn Y in a state in which rotational resistance is applied by the contact portions 41 and 42, the physical properties of the yarn Y, such as tension, strength, and elongation, fluctuate. It was verified whether it would be larger than when the fulcrum guide 31 was fixed. The yarn Y used in the experiment has a thickness of 33 dtex, and the fulcrum guide 31 has an outer diameter of 10 mm. When the running speed of the yarn Y is 4500 m/min, the rotation speed of the fulcrum guide 31 is 3000 to 5000 rpm, and the peripheral speed is 94 to 157 m/min (2.1 to 3.5% of the running speed of the yarn Y). rice field.

FIG. 6 is a diagram showing results of verification experiments for yarn physical properties. The numbers in each bar graph indicate the average value, and the scatter is also shown along with the bar graph. “No rotation” indicates the case where the fulcrum guide 31 is fixed, and “with rotation” indicates the case where the fulcrum guide 31 is driven to rotate while the rotation resistance is applied by the rotation resistance applying means 37 . As described above, although the rotational speed and peripheral speed of the fulcrum guide 31 slightly fluctuated, there was almost no difference in any of the yarn physical properties from when the fulcrum guide 31 was fixed, and variations in yarn quality were suppressed. rice field. From these experimental results, it can be said that it is possible to suppress the change in yarn quality during yarn winding by applying rotational resistance to the fulcrum guide 31 and rotating it at a low speed. Under the conditions of this verification experiment, when the peripheral speed of the fulcrum guide 31 is 5% of the running speed of the yarn Y, the rotational speed of the fulcrum guide 31 is about 7200 rpm.

In this modified example, the spring 36 of the above-described embodiment is not required, and the guide body 16 can be manufactured with a small number of parts.

In this modification, the contact portions 41 and 42 as the rotation resistance imparting means are provided between the inner peripheral surface of the fulcrum guide 31 and other members (intervening members 34 and 35) in contact with the inner peripheral surface of the fulcrum guide 31. is formed in Since the inner peripheral surface of the fulcrum guide 31 is generally larger in area than the end face, the frictional force can be easily adjusted by using the inner peripheral surface of the fulcrum guide 31 as a means for imparting rotational resistance.

In this modification, intervening members 34 and 35 are arranged between a shaft member 33 that rotatably supports a fulcrum guide 31 and the fulcrum guide 31. It is formed between the inner peripheral surface of the guide 31 and the intervening members 34 and 35 . With such a configuration, it is possible to adjust the frictional force at the contact portions 41 and 42 by adjusting the shape, size, material, etc. of the intervening members 34 and 35 , making it easier to adjust the rotational speed and peripheral speed of the fulcrum guide 31 .

10: yarn winder 13: bobbin holder (winding shaft)
16: guide body 31: fulcrum guide 33a: shaft portion 33b: flange portion (pressed portion)
34, 35: intervening member 34a, 35a: thrust bearing portion 34b, 35b: radial bearing portion 36: spring (pressing member)
37: Rotational resistance imparting means 41, 42: Contact parts (rotational resistance imparting means)
B: Bobbin Y: Thread

Claims (14)

A guide body having a fulcrum guide that serves as a fulcrum when winding the yarn on the bobbin while traversing it,
The fulcrum guide has a cylindrical shape and is rotatable around a central axis,
When the fulcrum guide receives a torque of a predetermined value or more from the yarn running in contact with the outer peripheral surface of the fulcrum guide, the fulcrum is driven to rotate at a peripheral speed slower than the running speed of the yarn. 1. A guide body, comprising a rotational resistance imparting means for imparting rotational resistance to the guide. 2. A guide body according to claim 1, wherein said rotational resistance imparting means imparts rotational resistance to said fulcrum guide so that the peripheral speed of said fulcrum guide is 5% or less of the running speed of said yarn. 3. The guide according to claim 2, wherein the rotation resistance imparting means imparts the rotation resistance to the fulcrum guide so that the peripheral speed of the fulcrum guide is 3.5% or less of the running speed of the yarn. body. 4. The guide body according to any one of claims 1 to 3, wherein said rotational resistance applying means applies rotational resistance to said fulcrum guide so that the rotational speed of said fulcrum guide is 7400 rpm or less. 5. The guide body according to claim 4, wherein said rotational resistance imparting means imparts rotational resistance to said fulcrum guide so that the rotational speed of said fulcrum guide is 5000 rpm or less. The rotational resistance imparting means is
a pressed portion disposed on one side of the fulcrum guide in the axial direction;
a pressing member that presses the fulcrum guide toward the pressed portion;
The guide body according to any one of claims 1 to 5, characterized by having: 7. The guide body according to claim 6, wherein an intervening member is arranged between the fulcrum guide and the pressed portion and/or between the fulcrum guide and the pressing member. The intervening member is
a thrust bearing portion in contact with the end surface of the fulcrum guide;
a radial bearing contacting the inner peripheral surface of the fulcrum guide;
8. A guide body according to claim 7, characterized in that it has a . 9. The guide body according to claim 6, wherein said pressing member is a spring. 10. The guide body according to any one of claims 6 to 9, wherein the pressed portion is formed integrally with a shaft member that rotatably supports the fulcrum guide. The rotation resistance imparting means is a contact portion formed between another member that contacts the fulcrum guide and the fulcrum guide,
6. The guide body according to any one of claims 1 to 5, wherein a frictional force is adjusted in the contact portion so that the peripheral speed of the fulcrum guide is slower than the running speed of the yarn. . 11. The contact portion as the rotation resistance imparting means is formed between the inner peripheral surface of the fulcrum guide and another member that contacts the inner peripheral surface of the fulcrum guide. Guide body described in . an intervening member is arranged between a shaft member that rotatably supports the fulcrum guide and the fulcrum guide;
13. The guide body according to claim 12, wherein the contact portion as the rotation resistance imparting means is formed between the inner peripheral surface of the fulcrum guide and the intervening member. A yarn winding machine for winding a plurality of yarns on a plurality of bobbins mounted on a winding shaft,
A yarn winding machine, wherein a plurality of the guide bodies according to any one of claims 1 to 13 are arranged in the axial direction of the winding shaft.

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