CN117466076A

CN117466076A - Bobbin holder and yarn winding machine

Info

Publication number: CN117466076A
Application number: CN202310814704.1A
Authority: CN
Inventors: 吉野恭平; 冈田圭介; 川合雅士
Original assignee: TMT Machinery Inc
Current assignee: TMT Machinery Inc
Priority date: 2022-07-29
Filing date: 2023-07-05
Publication date: 2024-01-30
Also published as: KR20240016879A; EP4311801A1; JP2024019003A

Abstract

The invention provides a bobbin bracket and a yarn winding machine. The bobbin holder (41) is provided with a holder body (61), a core member (62), and a middle support section (80). The holder body (61) includes a cylindrical portion (61 c) for holding a plurality of bobbins (91) for winding yarn arranged in the axial direction. The core member (62) is disposed inside the cylindrical portion (61 c) of the holder body (61), and the 1 st and 2 nd axial ends are supported by the holder body (61). The intermediate support section (80) is disposed between the 1 st end and the 2 nd end on the radially inner side of the cylindrical section (61 c) and the radially outer side of the core member (62), and supports the core member (62) on the holder body (61).

Description

Bobbin holder and yarn winding machine

Technical Field

The present invention relates generally to a bobbin holder for holding a plurality of bobbins for winding yarn aligned in an axial direction.

Background

Patent document 1 is japanese patent application laid-open No. 2013-193819.

Patent document 1 discloses a yarn winding machine that winds a yarn around a bobbin held by a bobbin holder to produce a package. The bobbin holder of patent document 1 includes a rotary shaft, a rotary tube, and a sleeve. A drive shaft of an electric motor is connected to one end of a rotation shaft, and the rotation shaft is rotationally driven by the electric motor. The rotary cylinder is disposed radially outward of the rotary shaft. One end of the rotary drum is mounted to a flange portion provided on the rotary shaft. The sleeve is arranged at the other end of the rotary cylinder. Specifically, a sleeve is interposed between the support member of the bobbin holder and the rotary drum. The sleeve receives and absorbs vibrations of the rotary drum. Thereby, vibration of the bobbin holder can be reduced.

In recent years, with an increase in the number of bobbins held by a bobbin holder or a higher speed of yarn winding, the influence of vibration of the bobbin holder has become large. In this regard, the bobbin holder of patent document 1 is configured to connect a rotary shaft (core member) to a rotary tube at two positions of a flange portion and a sleeve. Therefore, when a long rotating shaft is used with an increase in the number of bobbins, the length of the unsupported portion of the rotating shaft becomes longer. As a result, the rotation shaft deforms at the unsupported portion to generate excessive vibration, or a vibration mode occurs in which the portion of the rotation shaft that is not connected is an antinode. As a result, excessive vibration may occur in the bobbin holder.

Disclosure of Invention

The present invention has been made in view of the above circumstances, and a main object thereof is to provide a bobbin holder capable of more reliably suppressing occurrence of excessive vibration.

As described above, the means for solving the problems and the effects thereof will be described.

According to the 1 st aspect of the present invention, there is provided a bobbin holder configured as follows. That is, the bobbin holder includes a holder body, a core member, and a middle support portion. The holder body includes a cylindrical portion for holding a plurality of bobbins for winding yarn aligned in an axial direction. The core member is disposed inside the cylindrical portion of the holder body, and the 1 st and 2 nd axial ends are supported by the holder body. The intermediate support portion is disposed between the 1 st end and the 2 nd end on the radially inner side of the cylindrical portion and the radially outer side of the core member, and supports the core member on the holder main body.

Accordingly, since the core member is supported by the holder main body through the intermediate portion in addition to the 1 st end portion and the 2 nd end portion, vibration due to deformation of the core member and vibration having the intermediate portion of the core member as an antinode can be reduced. As a result, excessive vibration of the bobbin holder can be more reliably suppressed.

Preferably, in the bobbin holder, a plurality of intermediate support portions are arranged in the axial direction.

Accordingly, the length of the portion of the core member that is not supported by the holder main body can be shortened, and thus, excessive vibration of the bobbin holder can be more reliably suppressed.

In the bobbin holder, the intermediate support portion is preferably disposed at a center in an axial direction of the core member or at a position offset from the center by 30% or less of a length of the core member.

Thus, the portion where the deformation of the core member is likely to occur and the portion where the antinode of the vibration of the core member is likely to be formed can be supported by the holder body. Therefore, excessive vibration of the bobbin holder can be more reliably suppressed.

The bobbin holder is preferably configured as follows. That is, the intermediate support portion includes a base member and an O-ring. The base member is annular and has a recess formed along a circumferential direction. The O-ring is mounted in a recess of the base member.

By providing the O-ring, the intermediate support portion can be brought into close contact with the holder main body side or the core member side, and therefore vibration due to rattling is less likely to occur. Further, in the case where only the O-ring is disposed between the holder main body and the core member, vibration due to deformation of the O-ring can be generated, but by providing the base member, deformation of the O-ring can be reduced, and therefore vibration due to deformation of the O-ring is less likely to be generated.

In the spool holder, preferably, a plurality of the O-rings of the intermediate support portion are arranged in an axial direction.

This stabilizes the posture of the core member, and can more reliably suppress excessive vibration of the bobbin holder, as compared with a case where one O-ring is disposed in the axial direction.

The bobbin holder is preferably configured as follows. That is, the intermediate support portion includes an inner O-ring and an outer O-ring as the O-rings. The inner O-ring is disposed in contact with the core member and the base member. The outer O-ring is disposed in contact with the cylindrical portion of the holder body and the base member.

Thus, since the O-rings are disposed on both the core member side and the holder main body side, vibration due to vibration is less likely to occur.

The bobbin holder is preferably configured as follows. That is, the bobbin holder includes a holding structure for holding the bobbin in the holder body. The holding structure includes a protruding piece and a sliding piece. The protruding piece is provided on the holder body and can protrude radially outward of the holder body. The slide piece is provided on the core member, and slides in the axial direction to press the protruding piece to the outside in the radial direction. The intermediate support portion is disposed between the slide plates in the axial direction.

By disposing the intermediate support portion between the slides, the holding structure of the bobbin can coexist with the intermediate support portion.

According to the aspect of the present invention according to claim 2, there is provided a yarn winding machine including the bobbin holder and the driving unit. The driving unit rotationally drives the bobbin holder to wind the elastic yarn around the bobbins held by the bobbin holder.

Thereby, the yarn winding machine capable of suppressing the excessive vibration of the bobbin holder can be realized.

Drawings

Fig. 1 is a front view of a yarn winding machine according to an embodiment of the present invention.

Fig. 2 is a side view of the yarn winding machine.

Fig. 3 is a block diagram of a yarn winding machine.

Fig. 4 is a side view of the spool support.

Fig. 5 is a cross-sectional view of the bobbin holder in a state where the bobbin is not held.

Fig. 6 is a cross-sectional view of the bobbin bracket holding the bobbin.

Fig. 7 is a cross-sectional perspective view of the intermediate support portion.

Fig. 8 is a graph showing vibration values of a bobbin holder having an intermediate support portion and a bobbin holder having no intermediate support portion.

Fig. 9 is a side view of a bobbin holder according to a modification.

Fig. 10 is a graph showing vibration values of a bobbin holder having one intermediate support portion and a bobbin holder having two intermediate support portions.

Detailed Description

Next, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a front view of a yarn winding machine 1 according to an embodiment of the present invention. Fig. 2 is a side view of the yarn winding machine 1. Fig. 3 is a block diagram of the yarn winding machine 1. In the following description, the upstream or downstream of the yarn in the traveling direction may be simply referred to as upstream or downstream.

A spinning machine, not shown, is disposed upstream of the yarn winding machine 1 shown in fig. 1. The spinning machine produces the yarn 93 and supplies it to the yarn winding machine 1. The yarn winding machine 1 winds the yarn 93 around the bobbin 91 placed on the bobbin holder 41 to produce a package 94. The yarn 93 is, for example, an elastic yarn such as spandex or a synthetic fiber yarn such as nylon or polyester. However, the type of the yarn 93 is not limited to these.

As shown in fig. 2, a plurality of yarns 93 aligned in the axial direction of the bobbin holder 41 are supplied to the yarn winding machine 1. The plurality of bobbins 91 are arranged in the axial direction of the bobbin holder 41. The yarn winding machine 1 winds a plurality of yarns 93 around bobbins 91, respectively, to produce a plurality of packages 94.

The details of the yarn winding machine 1 will be described below. As shown in fig. 1, the yarn winding machine 1 includes a frame 11, a 1 st housing 20, a 2 nd housing 30, and a turntable plate (bobbin holder moving mechanism) 40.

The frame 11 is a member for holding each part of the yarn winding machine 1. The 1 st housing 20 and the 2 nd housing 30 are mounted on the frame 11.

The 1 st housing 20 is provided with a traverse device 21. The traverse device 21 reciprocates in the winding width direction (axial direction of the bobbin holder 41) in a state where a traverse guide 23 described later engages with the yarn 93, thereby traversing the yarn 93 conveyed downstream. By the traverse operation of the yarn 93, a yarn layer is formed on the bobbin 91. As shown in fig. 3, the traverse device 21 includes a traverse cam 22 and a traverse guide 23.

The traverse cam 22 is a roller-shaped member disposed parallel to the bobbin holder 41. A spiral cam groove is formed in the outer peripheral surface of the traverse cam 22. The traverse cam 22 is rotationally driven by a traverse motor 51.

The traverse motor 51 is controlled by the control device 50. The traverse guide 23 is a portion engaged with the yarn 93. The front end of the traverse guide 23 has a substantially U-shaped guide portion, for example, and engages with the yarn 93 so as to sandwich the yarn 93 in the winding width direction. The base end of the traverse guide 23 is located in the cam groove of the traverse cam 22. According to this configuration, the traverse cam 22 is driven to rotate, and the traverse guide 23 can be reciprocated in the winding width direction.

The control device 50 is configured as a well-known computer, and includes CPU, RAM, SSD and the like. The CPU is one type of processor. The SSD stores therein a program and data for controlling the yarn winding machine 1. The control device 50 can perform various controls on the yarn winding machine 1 by reading out a program stored in the SSD to the RAM and executing the program by the CPU. In addition, instead of the SSD, another storage device such as an HDD or a flash memory may be used.

The 2 nd housing 30 is rotatably mounted with a contact roller 31. The contact roller 31 is rotationally driven by a contact roller motor 52. The contact roller 31 is attached to the 2 nd casing 30 via an arm, not shown. By the arm swinging, the contact roller 31 can relatively move in the direction of the 2 nd casing 30. The contact roller 31 of the present embodiment moves downward by its own weight, but the contact roller 31 may be driven in the up-down direction by an actuator such as a cylinder.

The contact roller 31 is disposed downstream of the traverse guide 23 in the yarn traveling direction. The contact roller 31 rotates while contacting the yarn layer of the package 94 with a predetermined pressure at the time of winding the yarn 93, thereby conveying the yarn 93 from the traverse guide 23 to the yarn layer of the package 94 and adjusting the yarn layer shape of the package 94. The contact roller motor 52 may be omitted, and the contact roller 31 may be driven to rotate with respect to the package 94.

The 2 nd case 30 is provided with an operation panel 32. The operation panel 32 is a device operated by an operator. The operator instructs the yarn winding machine 1 by operating the operation panel 32. Examples of the instruction by the operator include start of winding, stop of winding, turning on/off of a function of driving the contact roller 31 in the up-down direction, and change of winding conditions.

The turntable plate 40 is a disk-shaped member. The turntable 40 is rotatably attached to the frame 11. The rotation axis of the turntable 40 is the center position of the circle of the turntable 40. The turntable plate 40 is rotationally driven by a turntable motor 53 shown in fig. 3. The turntable motor 53 is controlled by the control device 50.

Bobbin holders 41 are provided at two positions of the turntable plate 40 facing each other across the center of the circle. A plurality of bobbins 91 can be axially aligned and mounted on the respective bobbin holders 41. By rotating the platen 40, the positions of the two bobbin holders 41 can be changed. As shown in fig. 1, the bobbin holder 41 has a winding position and a standby position. The yarn winding machine 1 winds the yarn 93 around the bobbin 91 attached to the bobbin holder 41 at the winding position to produce a package 94. In addition, if the positions of the two bobbin holders 41 can be changed, other devices may be used instead of the turret plate 40.

The two bobbin holders 41 are rotatably attached to the turntable plate 40 with the axis position of the bobbin holders 41 as the rotation center. As shown in fig. 3, bobbin holder motors (driving units) 54 are attached to the two bobbin holders 41, respectively. The bobbin holder 41 is rotationally driven by a bobbin holder motor 54. The bobbin holder motor 54 is controlled by the control device 50.

The yarn winding machine 1 includes a support arm 43, and the support arm 43 supports one end (an end opposite to the turntable plate 40) of the bobbin holder 41 in the axial direction at the winding position. Accordingly, the bobbin holder 41 is supported by the turntable plate 40 and the support arm 43, and thus the posture of the bobbin holder 41 can be stabilized. The support arm 43 is not an essential component, and may be omitted.

The yarn winding machine 1 winds a predetermined amount of yarn 93 around each of the plurality of bobbins 91 attached to the bobbin holder 41 at the winding position. Then, when the package 94 becomes full, the platen 40 rotates to switch the position of the bobbin holder 41. Then, the package 94 of the bobbin holder 41 that has become full-wound and is located at the standby position is collected, and the yarn 93 is wound on the bobbin 91 of the bobbin holder 41 located at the winding position. The bobbin 91 is reinstalled on the bobbin holder 41 from which the package 94 is recovered.

Next, a detailed structure of the bobbin holder 41, particularly, a structure for suppressing excessive vibration generated in the bobbin holder 41 will be described with reference to fig. 4 to 7. In the following description, the axial direction of the bobbin holder 41 will be simply referred to as the axial direction. The turntable plate 40 side in the axial direction is referred to as a base end side, and the opposite side (support arm 43 side) is referred to as a tip end side.

As shown in fig. 4, the bobbin holder 41 includes a holder body 61, a core member 62, a biasing member 63, and a coupling member 64. The material constituting the bobbin holder 41 is, for example, aluminum or iron, but may be resin.

The holder body 61 includes a 1 st mounting portion 61a, a 2 nd mounting portion 61b, and a cylindrical portion 61c. The 1 st mounting portion 61a is an end portion of the holder main body 61 on the base end side. As will be described later, the core member 62 is attached to the 1 st attachment portion 61a. The 2 nd mounting portion 61b is an end portion of the holder main body 61 on the front end side. As will be described later, the core member 62 is attached to the 2 nd attachment portion 61b. The cylindrical portion 61c is a cylindrical portion located between the 1 st mounting portion 61a and the 2 nd mounting portion 61b in the axial direction. The core member 62 is disposed radially inward of the cylindrical portion 61c. The bobbin 91 is held radially outside the cylindrical portion 61c by a holding structure 70 described later.

The core member 62 is a solid member having a circular cross section. The 1 st end 62a, which is the end on the base end side of the core member 62, is fixed to the 1 st mounting portion 61a of the holder main body 61 by a connecting member 64. Thereby, the 1 st mounting portion 61a rotates integrally with the core member 62. In the present embodiment, the core member 62 is slidably attached to the holder main body 61 in the axial direction. The 2 nd end 62b, which is the end on the distal end side of the core member 62, is fixed to the 2 nd attachment portion 61b via the urging member 63. The core member 62 is pressed against the holder main body 61 on the base end side by the urging force of the urging member 63. The 1 st end 62a and the 2 nd end 62b include not only the end of the core member 62 but also the vicinity of the end.

Further, the rotational driving force generated by the bobbin holder motor 54 is transmitted to the 1 st mounting portion 61a of the holder main body 61. Thereby, the core member 62 is rotationally driven. In addition, the rotational drive force generated by the spool support motor 54 may also be directly transferred to the core member 62.

The configuration and shape of the holder main body 61 and the core member 62 are examples, and may be changed as appropriate. For example, the holder main body 61 and the core member 62 may be mounted so as not to slide. The core member 62 may be a hollow member (i.e., a circular tube).

Next, a holding structure 70 for holding the bobbin 91 in the cylindrical portion 61c of the holder main body 61 will be described mainly with reference to fig. 5 and 6. As shown in fig. 5 and 6, the holding structure 70 includes a through hole 71, a protruding piece 72, a contact member 73, a slider 74, and a spring 75.

The through hole 71 is a through hole formed in the cylindrical portion 61c. The axial direction of the through hole 71 is the same as the radial direction of the cylindrical portion 61c. The plurality of through holes 71 are formed in a circumferential direction. Further, two through holes 71 are formed in the axial direction with respect to one bobbin 91. The number and layout of the through holes 71 in the present embodiment are examples, and the number and layout of the through holes 71 may be different from those in the present embodiment.

The protruding piece 72 is inserted into the through hole 71 and is movably attached to the through hole 71. The movement direction of the protruding piece 72 is the same direction as the axial direction of the through hole 71 and the radial direction of the cylindrical portion 61c.

A contact member 73 is attached to a radially outer surface of the protruding piece 72. The contact member 73 is made of rubber, polyurethane, soft resin, or the like, and is an elastically deformable member. The contact member 73 presses the inner wall surface of the bobbin 91 radially outward by sliding the protruding piece 72 radially outward. Thereby, the bobbin 91 can be held by the cylindrical portion 61c. The contact member 73 is not an essential component, and the protruding piece 72 may directly press the inner wall surface of the bobbin 91.

A slide 74 is mounted to the core member 62. By the core member 62 sliding in the axial direction, the slide plate 74 also slides in the axial direction integrally with the core member 62. The slider 74 is formed at a position corresponding to the protruding piece 72. Specifically, the radially inner surface of the protruding piece 72 contacts the radially outer surface of the sliding piece 74. Further, a spring 75 is disposed between the adjacent slide pieces 74.

Here, an inclined surface inclined with respect to the axial direction is formed on the radially inner side of the protruding piece 72. Further, an inclined surface corresponding to the inclined surface of the protruding piece 72 is formed on the radially outer side of the slide piece 74. As described above, the inclined surface of the protruding piece 72 contacts the inclined surface of the sliding piece 74. According to this configuration, the slide piece 74 slides along the axial direction (specifically, toward the base end side) together with the core member 62, and the protruding piece 72 is pressed radially outward. As a result, as shown in fig. 6, the protruding piece 72 moves radially outward, and the contact member 73 presses the inner wall surface of the bobbin 91 radially outward. Thereby, the bobbin 91 can be held by the bobbin holder 41.

As described above, the core member 62 is pressed toward the axial base end side by the urging member 63. Thus, the bobbin 91 can be held by the bobbin holder 41 without using power of an actuator. Further, the holding of the bobbin 91 can be released by sliding the core member 62 toward the tip end side by an actuator (e.g., a cylinder or a motor) not shown.

The holding structure 70 of the present embodiment is an example, and the bobbin 91 may be held by a holding structure different from the present embodiment to the bobbin holder 41.

Next, an excessive vibration generated in the bobbin holder 41 and a structure for suppressing the vibration will be described.

In the yarn winding machine 1 of the present embodiment, the yarns 93 are wound simultaneously on the plurality of bobbins 91 in order to achieve high productivity. Therefore, the axial length of the bobbin holder 41 of the present embodiment is very long. On the other hand, if the core member 62 is supported by the holder main body 61 only by the 1 st end 62a and the 2 nd end 62b, the length of the portion not supported by the holder main body 61 becomes long, and therefore, various vibration modes may occur. For example, there is a possibility that a vibration mode may be generated in which an intermediate portion (for example, a central portion) in the longitudinal direction of the core member 62 is an antinode of vibration. Vibration in this vibration mode has not been conventionally conceived. Therefore, if no countermeasure against this vibration is taken, there is a possibility that excessive vibration may be generated in the bobbin holder 41 according to the rotational speed of the bobbin holder 41. When the axial length of the bobbin holder 41 is extremely long, the middle portion of the core member 62 in the longitudinal direction is likely to be deformed by various reasons. For example, the core member 62 may be deformed due to the reaction force of the protruding piece 72 of the holding structure 70 pressing the bobbin 91. When the core member 62 is deformed, the natural frequency of vibration changes, and therefore, there is a possibility that excessive vibration may be generated in the bobbin holder 41 according to the rotational speed of the bobbin holder 41.

In order to suppress these excessive vibrations, the bobbin holder 41 of the present embodiment is provided with one intermediate support portion 80 shown in fig. 5 to 7. The intermediate support portion 80 is a member for supporting the intermediate portion of the core member 62 to the holder main body 61. As shown in fig. 4, the intermediate support portion 80 is disposed in the central region of the core member 62. The central region is the axial center of the core member 62 or a region offset from the center within 30% of the length of the core member. Since the excessive vibration is likely to occur starting from the central portion of the core member 62, the excessive vibration can be more reliably suppressed by disposing the intermediate support portion 80 in the central region.

As described above, the holding structure 70 (particularly the slide sheet 74) is arranged between the cylindrical portion 61c and the core member 62. Thus, the intermediate support portion 80 is disposed at a position avoiding the slide 74. Specifically, as shown in fig. 5 or 6, in the region where the intermediate support portion 80 is disposed, the slide sheet 74 is divided into two in the axial direction, and the intermediate support portion 80 is disposed between the two slide sheets 74. This allows the holding structure 70 to coexist with the intermediate support portion 80. The intermediate support portion 80 is in contact with the slide plate 74 via the spring 75 or directly. Therefore, the intermediate support portion 80 is configured to be capable of receiving force from the slide plate 74 and integrally sliding in the axial direction with the slide plate 74.

The intermediate support portion 80 includes a base member 81. The base member 81 is an annular member. The base member 81 is disposed radially inward of the cylindrical portion 61c and radially outward of the core member 62. That is, the outer diameter of the base member 81 is substantially the same as the inner diameter of the cylindrical portion 61c, and the inner diameter of the base member 81 is substantially the same as the outer diameter of the core member 62.

The base member 81 is formed with a 1 st inner concave portion 81a, a 2 nd inner concave portion 81b, a 1 st outer concave portion 81c, and a 2 nd outer concave portion 81d. The 1 st inner concave portion 81a and the 2 nd inner concave portion 81b are concave portions formed on the radially inner surface of the base member 81, and are formed in an aligned manner in the axial direction. The 1 st outer concave portion 81c and the 2 nd outer concave portion 81d are concave portions formed on the radially outer surface of the base member 81, and are formed in an aligned manner in the axial direction.

A 1 st inner O-ring 82a is disposed in the 1 st inner recess 81a, and a 2 nd inner O-ring 82b is disposed in the 2 nd inner recess 81 b. The 1 st inner O-ring 82a and the 2 nd inner O-ring 82b are in contact with the base member 81 and with the core member 62. This can improve the adhesion between the intermediate support portion 80 and the core member 62.

The 1 st outer concave portion 81c is provided with the 1 st outer O-ring 82c, and the 2 nd outer concave portion 81d is provided with the 2 nd outer O-ring 82d. The 1 st outer O-ring 82c and the 2 nd outer O-ring 82d are in contact with the base member 81 and in contact with the cylindrical portion 61c. This can improve the adhesion between the intermediate support portion 80 and the cylindrical portion 61c.

In the intermediate support portion 80 of the present embodiment, since the O-rings are disposed on both the radially inner surface and the radially outer surface, the rattling of the core member 62 or the cylindrical portion 61c in the radial direction can be reduced. Further, in the intermediate support portion 80 of the present embodiment, O-rings are arranged in an axial direction. Specifically, the 1 st inner O-ring 82a and the 2 nd inner O-ring 82b (i.e., a plurality of O-rings) are arranged in an axial direction in one intermediate support portion 80, and the 1 st outer O-ring 82c and the 2 nd outer O-ring 82d (i.e., a plurality of O-rings) are arranged in an axial direction in one intermediate support portion 80. Therefore, vibration of the core member 62 or the cylindrical portion 61c centered on the O-ring can be suppressed. In the present embodiment, a plurality of O-rings are disposed on both the radially inner and outer surfaces of one intermediate support portion 80. The layout of the O-ring in the present embodiment is an example, and can be modified as follows. For example, one or more O-rings may be disposed on the radially inner surface of one intermediate support portion 80. One or more O-rings may be disposed on the radially outer surface of one intermediate support portion 80. One O-ring may be provided on each of the radially inner and outer surfaces of one intermediate support portion 80. One or more O-rings may be disposed only on one of the radially inner and outer surfaces of the intermediate support portion 80.

Next, the effect of the center support 80 will be described with reference to fig. 8.

Fig. 8 shows a graph showing a change in the vibration value when the rotational speed of the bobbin holder 41 is increased, for the bobbin holder 41 having the intermediate support portion 80 and the bobbin holder 41 not having the intermediate support portion 80. The vibration value is a total displacement per unit time accompanying vibration of the bobbin holder 41. For example, the greater the vibration frequency or the greater the amplitude, the greater the vibration value.

As shown in fig. 8, in the bobbin holder 41 without the intermediate support portion 80, the vibration value is greatly increased when the rotational speed of the bobbin holder 41 exceeds a specific value. This is because the above-described excessive vibration is generated. In contrast, in the bobbin holder 41 provided with the intermediate support portion 80, the vibration value is maintained at a low value even after the rotational speed exceeds a specific value. As described above, by providing the intermediate support portion 80, excessive vibration can be suppressed.

Next, a modification of the above embodiment will be described with reference to fig. 9 and 10. In the description of the present modification, the same reference numerals are given to the same or similar components as those of the above-described embodiment in the drawings, and the description thereof may be omitted.

The bobbin holder 41 of the above embodiment includes one intermediate support portion 80, whereas the bobbin holder 41 of the present modification includes two intermediate support portions 80. The intermediate support portions 80 are disposed on the distal end side and the proximal end side of the center in the axial direction of the core member 62, respectively.

By disposing the two intermediate support portions 80, the distance between the support portions of the core member 62 becomes shorter. Therefore, it is possible to suppress the generation of various vibration modes. Further, when the intermediate support portion 80 is inserted and mounted between the cylindrical portion 61c and the core member 62, the mounting position becomes more difficult as the mounting position becomes more distant from the axial end portion of the cylindrical portion 61c, and the work of mounting the intermediate support portion 80 becomes easier. In this regard, in the present modification, the distance from the axial end of the cylindrical portion 61c to the attachment position is shorter than in the above-described embodiment. Therefore, the work of attaching the intermediate support portion 80 may be easy.

Fig. 10 shows a graph showing a change in the vibration value when the rotational speed of the bobbin holder 41 is increased, for the bobbin holder 41 of the above-described embodiment including one intermediate support portion 80 and the bobbin holder 41 of the present modification including two intermediate support portions 80. As shown in fig. 10, by providing two intermediate support portions 80, the vibration value can be reduced as compared with the case where one intermediate support portion 80 is provided. In addition, the rotation speed of the bobbin holder 41 differs between the case where one intermediate support portion 80 is provided and the case where two intermediate support portions 80 are provided, when the vibration value reaches the 1 st peak. Therefore, the number of intermediate support portions 80 can be selected so that the vibration value becomes smaller at the rotational speed that is frequently used.

As described above, the bobbin holder 41 of the present embodiment includes the holder body 61, the core member 62, and the intermediate support portion 80. The holder body 61 includes a cylindrical portion 61c, and holds a plurality of bobbins 91 for winding yarn aligned in the axial direction. The core member 62 is disposed inside the cylindrical portion 61c of the holder main body 61, and the 1 st end 62a and the 2 nd end 62b in the axial direction are supported by the holder main body 61. The intermediate support portion 80 is disposed between the 1 st end portion 62a and the 2 nd end portion 62b radially inward of the cylindrical portion 61c and radially outward of the core member 62, and supports the core member 62 to the holder main body 61.

Accordingly, since the core member 62 is supported by the holder main body 61 through the intermediate portion in addition to the 1 st end portion 62a and the 2 nd end portion 62b, vibration caused by deformation of the core member 62 and vibration having the intermediate portion of the core member 62 as an antinode can be reduced. As a result, excessive vibration of the bobbin holder 41 can be further reliably suppressed.

In the bobbin holder 41 of the present embodiment, a plurality of intermediate support portions 80 are arranged in the axial direction.

Accordingly, the length of the portion of the core member 62 not supported by the holder main body 61 can be shortened, and thus, excessive vibration of the bobbin holder 41 can be more reliably suppressed.

In the bobbin holder 41 of the present embodiment, the intermediate support portion 80 is disposed at the center in the axial direction of the core member 62 or at a position offset from the center by 30% or less of the length of the core member 62.

As a result, the holder body 61 can be supported by the portion where the deformation of the core member 62 is likely to occur and the portion where the antinode of the vibration of the core member 62 is likely to be formed. Therefore, excessive vibration of the bobbin holder 41 can be more reliably suppressed.

In the bobbin holder 41 of the present embodiment, the intermediate support portion 80 includes a base member 81 and O-rings (1 st inner O-ring 82a, 2 nd inner O-ring 82b, 1 st outer O-ring 82c, 2 nd outer O-ring 82 d). The base member 81 is annular, and has recesses (1 st inner recess 81a, 2 nd inner recess 81b, 1 st outer recess 81c, 2 nd outer recess 81 d) formed therein along the circumferential direction. The O-ring is mounted in a recess of the base member 81.

By providing the O-ring, the intermediate support portion 80 can be brought into close contact with the holder main body 61 side or the core member 62 side, and therefore vibration due to rattling is less likely to occur. Further, in the case where only the O-ring is disposed between the holder main body 61 and the core member 62, vibration due to deformation of the O-ring may occur, but by providing the base member 81, deformation of the O-ring can be reduced, and therefore vibration due to deformation of the O-ring is less likely to occur.

In the bobbin holder 41 of the present embodiment, a plurality of O-rings of the intermediate support portion 80 are arranged in an axial direction.

This stabilizes the posture of the core member 62, and can more reliably suppress excessive vibration of the bobbin holder 41, as compared with a case where one O-ring is disposed in the axial direction.

In the bobbin holder 41 of the present embodiment, the intermediate support portion 80 includes inner O-rings (1 st inner O-ring 82a, 2 nd inner O-ring 82 b) and outer O-rings (1 st outer O-ring 82c, 2 nd outer O-ring 82 d) as O-rings. The inner O-ring is configured to contact the core member 62 and the base member 81. The outer O-ring is disposed in contact with the cylindrical portion 61c of the holder main body 61 and the base member 81.

Accordingly, since the O-rings are disposed on both the core member 62 side and the holder main body 61 side, vibration due to vibration is less likely to occur.

The bobbin holder 41 of the present embodiment includes a holding structure 70 for holding the bobbin 91 in the holder body 61. The holding structure 70 includes a protruding piece 72 and a sliding piece 74. The protruding piece 72 is provided on the holder main body 61 and can protrude radially outward of the holder main body 61. The slide sheet 74 is provided on the core member 62, and slides in the axial direction to press the protruding piece 72 radially outward. The intermediate support portion 80 is disposed between the slide plates 74 in the axial direction.

By disposing the intermediate support portion 80 between the slide plates 74, the holding structure 70 of the bobbin 91 can coexist with the intermediate support portion 80.

The yarn winding machine 1 of the present embodiment includes a bobbin holder 41 and a bobbin holder motor 54. The bobbin holder motor 54 rotationally drives the bobbin holder 41, thereby winding the elastic yarn around the bobbins 91 held by the bobbin holder 41.

Thereby, the yarn winding machine 1 capable of suppressing excessive vibration of the bobbin holder 41 can be realized.

The preferred embodiments and modifications of the present invention have been described above, but the above configuration can be modified as follows.

The number of intermediate support portions 80 provided in the bobbin holder 41 is not limited to 1 or 2, but may be 3 or more. The position of the intermediate support portion 80 is an example and can be changed as appropriate. For example, in the case where one intermediate support portion 80 is provided, the intermediate support portion 80 may be disposed at a position offset from the central region. In the case where two or more intermediate support portions 80 are provided, the intermediate support portions 80 may be arranged asymmetrically in the axial direction.

The traverse device 21 of the above embodiment is of a cam drum type, but may have a different configuration as long as the traverse guide 23 can be reciprocated in the winding width direction. For example, a belt-type traverse device may be used instead of the traverse device 21.

In the above embodiment, the example of the yarn winding machine in which the present invention is applied to the yarn manufactured by the winding and spinning machine has been described, but the present invention may be applied to a false twist machine or a rewinder instead of being applied to the yarn winding machine.

Claims

1. A bobbin holder, comprising:

a holder body including a cylindrical portion for holding a plurality of bobbins for winding yarn arranged in an axial direction;

a core member disposed inside the cylindrical portion of the holder body, the 1 st end portion and the 2 nd end portion in the axial direction being supported by the holder body; and

and a middle supporting portion which is disposed between the 1 st end and the 2 nd end on the radial inner side of the cylindrical portion and the radial outer side of the core member, and supports the core member on the bracket main body.

2. The spool support of claim 1 wherein the spool support comprises a spool support,

the intermediate support portion is disposed in plurality in the axial direction.

3. The spool support according to claim 1 or 2, wherein,

the intermediate support portion is disposed at a center in an axial direction of the core member or at a position offset from the center by 30% or less of a length of the core member.

4. The spool support according to any of claims 1 to 3 wherein,

the intermediate support portion includes:

a base member having a ring shape and formed with a recess along a circumferential direction; and

an O-ring is mounted in the recess of the base member.

5. The spool support of claim 4 wherein the spool support comprises a spool support,

the plurality of O-rings of the intermediate support portion are arranged in an axial direction.

6. The spool support of claim 4 wherein the spool support comprises a spool support,

the intermediate support portion includes an inner O-ring and an outer O-ring as the O-rings,

the inner O-ring is arranged in contact with the core member and the base member,

the outer O-ring is disposed in contact with the cylindrical portion of the holder body and the base member.

7. The spool support according to any one of claims 1 to 6 wherein,

the bobbin holder includes a holding structure for holding the bobbin in the holder body,

the holding structure includes:

a protruding piece provided on the holder body and capable of protruding radially outward of the holder body; and

a slider provided on the core member and configured to slide in an axial direction to press the protruding piece to the outside in the radial direction,

the intermediate support portion is disposed between the slide plates in the axial direction.

8. A yarn winding machine is characterized by comprising:

the spool support of any one of claims 1 to 7; and

and a driving unit for rotating and driving the bobbin holder to wind the elastic yarn around the plurality of bobbins held by the bobbin holder.