Bobbin holder and yarn winder

Abstract

To provide a bobbin holder that can more reliably suppress excessive vibration.SOLUTION: A bobbin holder 41 includes: a holder body 61; a core member 62; and a midway support portion 80. The holder body 61 includes a cylindrical portion 61c and holds a plurality of axially aligned bobbins 91 for winding yarn. The core member 62 is disposed inside the cylindrical portion 61c of the holder body 61, and the first end and the second end in the axial direction are supported by the holder body 61. The midway support portion 80 is disposed inside the cylindrical portion 61c in the radial direction and outside the core member 62 in the radial direction, between the first end and the second end, to support the core member 62 on the holder body 61.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention primarily relates to a bobbin holder that holds a plurality of bobbins for winding yarn arranged in an axial direction. [Background technology]

[0002] Patent Document 1 discloses a yarn winding machine that winds yarn around a bobbin held in a bobbin holder to produce a package. The bobbin holder in Patent Document 1 includes a rotating shaft, a rotating cylinder, and a sleeve. One end of the rotating shaft is connected to a drive shaft of an electric motor, and the rotating shaft is driven to rotate by the electric motor. The rotating cylinder is disposed radially outward of the rotating shaft. One end of the rotating cylinder is attached to a flange portion provided on the rotating shaft. The sleeve is disposed at the other end of the rotating cylinder. In detail, the sleeve is fitted between a support member of the bobbin holder and the rotating cylinder. The sleeve receives and absorbs vibrations of the rotating cylinder. This reduces vibrations of the bobbin holder. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-193819 A Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, the impact of vibration of the bobbin holder has become greater with an increase in the number of bobbins held in the bobbin holder or an increase in the speed of thread winding. In this regard, the bobbin holder of Patent Document 1 is configured such that the rotating shaft (core member) and the rotating cylinder are connected at only two points, the flange portion and the sleeve. Therefore, when a long rotating shaft is used with an increase in the number of bobbins, the length of the unsupported parts of the rotating shaft becomes longer. As a result, the rotating shaft may deform at the unsupported parts, causing excessive vibration, or a vibration mode may occur with the unconnected parts of the rotating shaft as antinodes. As a result, excessive vibration may occur in the bobbin holder.

[0005] The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide a bobbin holder that can more reliably suppress the occurrence of excessive vibration.

[0006] The problem to be solved by the present invention has been described above. Next, the means for solving this problem and the effects thereof will be described.

[0007] According to a first aspect of the present invention, there is provided a bobbin holder having the following configuration. That is, the bobbin holder includes a holder body, a core member, and an intermediate support portion. The holder body includes a cylindrical portion and holds a plurality of bobbins for thread winding that are arranged in an axial direction. The core member is disposed inside the cylindrical portion of the holder body, and a first end and a second end in the axial direction are supported by the holder body. The intermediate support portion is disposed radially inward of the cylindrical portion and radially outward of the core member, between the first end and the second end, and supports the core member on the holder body.

[0008] As a result, since the core member is supported by the holder body not only at the first end and the second end but also at the middle portion, it is possible to reduce vibrations caused by deformation of the core member and vibrations with the middle portion of the core member as an antinode, and as a result, it is possible to more reliably suppress excessive vibrations of the bobbin holder.

[0009] In the bobbin holder, it is preferable that a plurality of the intermediate support portions are arranged in the axial direction.

[0010] This allows the length of the portion of the core member that is not supported by the holder body to be shortened, making it possible to more reliably suppress excessive vibration of the bobbin holder.

[0011] In the bobbin holder, it is preferable that the intermediate support portion is disposed at the axial center of the core member, or at a position displaced from the axial center by 30% or less of the length of the core member.

[0012] This allows the holder body to support the portions of the core member that are prone to deformation or vibration antinodes of the core member, thereby more reliably suppressing excessive vibration of the bobbin holder.

[0013] 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 ring-shaped and has a recess formed along the circumferential direction. The O-ring is attached to the recess of the base member.

[0014] By providing the O-ring, the intermediate support part can be brought into close contact with the holder body side or the core member side, so vibration caused by rattling is unlikely to occur. Also, if only the O-ring is placed between the holder body and the core member, vibration can occur due to deformation of the O-ring, but by providing the base member, the deformation of the O-ring can be reduced, so vibration due to deformation of the O-ring is unlikely to occur.

[0015] In the bobbin holder, it is preferable that a plurality of the O-rings of the intermediate support portion are arranged side by side in the axial direction.

[0016] This makes it possible to stabilize the posture of the core member compared to when one O-ring is arranged in the axial direction, and makes it possible to more reliably suppress excessive vibration of the bobbin holder.

[0017] 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-ring. The inner O-ring is disposed so as to contact the core member and the base member. The outer O-ring is disposed so as to contact the cylindrical portion of the holder body and the base member.

[0018] As a result, O-rings are placed on both the core member side and the holder main body side, so vibrations caused by rattling are less likely to occur.

[0019] The bobbin holder is preferably configured as follows. That is, the bobbin holder has a holding structure for holding the bobbin on the holder body. The holding structure has a protruding piece and a sliding piece. The protruding piece is provided on the holder body and is capable of protruding radially outward from the holder body. The sliding piece is provided on the core member and slides along the axial direction to press the protruding piece radially outward. The intermediate support portion is disposed between the sliding pieces in the axial direction.

[0020] By disposing the intermediate support portion between the slide pieces, it is possible to achieve both the bobbin holding structure and the intermediate support portion.

[0021] According to a second aspect of the present invention, there is provided a yarn winding machine including the bobbin holder and a drive unit. The drive unit rotates the bobbin holder to wind an elastic yarn onto each of the bobbins held by the bobbin holder.

[0022] This makes it possible to realize a yarn winding machine capable of suppressing excessive vibration of the bobbin holder. [Brief description of the drawings]

[0023] [Figure 1] 1 is a front view of a yarn winding machine according to an embodiment of the present invention; [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. 4 is a cross-sectional view of the bobbin holder when no bobbin is held. [Figure 6] FIG. 4 is a cross-sectional view of the bobbin holder holding a bobbin. [Figure 7] FIG. [Figure 8] 11 is a graph showing vibration values ​​of a bobbin holder with a midway support portion and a bobbin holder without a midway support portion. [Figure 9] FIG. 13 is a side view of a modified example of the bobbin holder. [Figure 10] 6 is a graph showing vibration values ​​of a bobbin holder having one midway support portion and a bobbin holder having two midway support portions. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] 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 in the running direction of the yarn may be simply referred to as the upstream or downstream.

[0025] A spinning machine (not shown) is disposed upstream of the yarn winding machine 1 shown in Fig. 1. The spinning machine produces yarn 93 and supplies it to the yarn winding machine 1. The yarn winding machine 1 winds the yarn 93 around a bobbin 91 set in a bobbin holder 41 to produce a package 94. The yarn 93 is, for example, an elastic yarn such as spandex, or a synthetic yarn such as nylon or polyester. However, the type of yarn 93 is not limited to these.

[0026] 2, a plurality of yarns 93 aligned in the axial direction of the bobbin holder 41 are supplied to the yarn winding machine 1. A plurality of bobbins 91 are also provided aligned in the axial direction of the bobbin holder 41. The yarn winding machine 1 winds the plurality of yarns 93 onto the bobbins 91, respectively, to produce a plurality of packages 94.

[0027] The following describes in detail the yarn winding machine 1. As shown in Fig. 1, the yarn winding machine 1 includes a frame 11, a first housing 20, a second housing 30, and a turret plate (bobbin holder moving mechanism) 40.

[0028] The frame 11 is a member that holds each component included in the yarn winding machine 1. To the frame 11, a first housing 20 and a second housing 30 are attached.

[0029] A traverse device 21 is attached to the first housing 20. The traverse device 21 traverses the yarn 93 sent downstream by reciprocating in the winding width direction (the axial direction of the bobbin holder 41) with a traverse guide 23, which will be described later, engaged with the yarn 93. This traverse movement of the yarn 93 forms a yarn layer on the bobbin 91. As shown in FIG. 3, the traverse device 21 includes a traverse cam 22 and a traverse guide 23.

[0030] The traverse cam 22 is a roller-shaped member disposed in parallel to the bobbin holder 41. A spiral cam groove is formed on the outer circumferential surface of the traverse cam 22. The traverse cam 22 is rotated by a traverse motor 51.

[0031] The traverse motor 51 is controlled by the control device 50. The traverse guide 23 is a part that engages with the yarn 93. The tip of the traverse guide 23 has, for example, a substantially U-shaped guide portion, and engages with the yarn 93 by pinching the yarn 93 in the winding width direction. The base end of the traverse guide 23 is positioned in the cam groove of the traverse cam 22. With this configuration, the traverse cam 22 is rotationally driven, and the traverse guide 23 can be reciprocated in the winding width direction.

[0032] The control device 50 is configured as a known computer and includes a CPU, a RAM, an SSD, etc. The CPU is a type of processor. Programs and data for controlling the yarn winding machine 1 are stored in advance in the SSD. The control device 50 can perform various controls on the yarn winding machine 1 by reading the programs stored in the SSD into the RAM and executing them with the CPU. Note that other storage devices such as an HDD or a flash memory may be used instead of the SSD.

[0033] The contact roller 31 is rotatably attached to the second housing 30. The contact roller 31 is rotationally driven by a contact roller motor 52. The contact roller 31 is attached to the second housing 30 via an arm (not shown). As this arm swings, the contact roller 31 is capable of moving vertically relative to the second housing 30. In this embodiment, the contact roller 31 moves downward by its own weight, but the contact roller 31 may also be driven in the vertical direction by an actuator such as a cylinder.

[0034] The contact roller 31 is disposed downstream in the yarn running direction from the traverse guide 23. The contact roller 31 rotates while contacting the yarn layer of the package 94 with a predetermined pressure when winding the yarn 93, thereby feeding the yarn 93 from the traverse guide 23 to the yarn layer of the package 94 and adjusting the shape of the yarn layer of the package 94. Note that the contact roller motor 52 may be omitted and the contact roller 31 may be rotated following the rotation of the package 94.

[0035] The second housing 30 is provided with an operation panel 32. The operation panel 32 is a device that is operated by an operator. The operator issues instructions to the yarn winding machine 1 by operating the operation panel 32. Examples of instructions issued by the operator include starting winding, stopping winding, turning on / off a function for driving the contact roller 31 in the vertical direction, changing the winding conditions, etc.

[0036] The turret plate 40 is a disk-shaped member. The turret plate 40 is rotatably attached to the frame 11. The rotation axis of the turret plate 40 is the center position of the circle of the turret plate 40. The turret plate 40 is rotated by a turret motor 53 shown in FIG. 3. The turret motor 53 is controlled by the control device 50.

[0037] The turret plate 40 has bobbin holders 41 at two locations facing each other across the center of the circle. A plurality of bobbins 91 can be attached to each of the bobbin holders 41 in an axial direction. The positions of the two bobbin holders 41 can be changed by rotating the turret plate 40. As shown in FIG. 1, the bobbin holder 41 has a winding position and a standby position. The yarn winding machine 1 winds a yarn 93 onto a bobbin 91 attached to the bobbin holder 41 at the winding position to produce a package 94. Note that, as long as the positions of the two bobbin holders 41 can be changed, another device may be used instead of the turret plate 40.

[0038] The two bobbin holders 41 are attached to the turret plate 40 so as to be rotatable about the axial position of the bobbin holder 41. As shown in Fig. 3, a bobbin holder motor (drive unit) 54 is attached to each of the two bobbin holders 41. The bobbin holder 41 is driven to rotate by the bobbin holder motor 54. The bobbin holder motor 54 is controlled by the control device 50.

[0039] The yarn winding machine 1 includes a support arm 43 that supports one axial end (the end opposite to the turret plate 40) of the bobbin holder 41 at the winding position. As a result, the bobbin holder 41 is supported at both ends by the turret plate 40 and the support arm 43, so that the posture of the bobbin holder 41 can be stabilized. Note that the support arm 43 is not an essential component and can be omitted.

[0040] The yarn winding machine 1 winds a predetermined amount of yarn 93 onto each of the multiple bobbins 91 attached to the bobbin holder 41 at the winding position. When the package 94 becomes full, the turret plate 40 rotates to switch the position of the bobbin holder 41. After that, the package 94 from the bobbin holder 41 that is full and in the standby position is collected, and the yarn 93 is wound onto the bobbin 91 of the bobbin holder 41 at the winding position. A new bobbin 91 is attached to the bobbin holder 41 from which the package 94 was collected.

[0041] 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 Fig. 7. In the following description, the axial direction of the bobbin holder 41 will be simply referred to as the axial direction. In addition, in the axial direction, the turret plate 40 side will be referred to as the base end side, and the opposite side (the support arm 43 side) will be referred to as the tip end side.

[0042] 4, the bobbin holder 41 includes a holder body 61, a core member 62, a biasing member 63, and a connecting member 64. The material constituting the bobbin holder 41 is, for example, aluminum or iron, but may also be resin.

[0043] The holder body 61 includes a first attachment portion 61a, a second attachment portion 61b, and a cylindrical portion 61c. The first attachment portion 61a is an end portion on the base end side of the holder body 61. As described later, a core member 62 is attached to the first attachment portion 61a. The second attachment portion 61b is an end portion on the tip end side of the holder body 61. As described later, the core member 62 is attached to the second attachment portion 61b. The cylindrical portion 61c is a cylindrical portion located between the first attachment portion 61a and the second attachment portion 61b in the axial direction. The core member 62 is disposed on the radial inner side of the cylindrical portion 61c. A bobbin 91 is held on the radial outer side of the cylindrical portion 61c by a holding structure 70 described later.

[0044] The core member 62 is a solid member having a circular cross section. A first end 62a, which is an end on the base end side of the core member 62, is fixed to a first mounting portion 61a of the holder body 61 by a connecting member 64. As a result, the first mounting portion 61a and the core member 62 rotate integrally. In this embodiment, the core member 62 is attached to the holder body 61 so as to be slidable in the axial direction. A second end 62b, which is an end on the tip side of the core member 62, is fixed to the second mounting portion 61b via a biasing member 63. The biasing force of the biasing member 63 presses the core member 62 toward the base end side with respect to the holder body 61. The first end 62a and the second end 62b include not only the end of the core member 62 but also the vicinity of the end.

[0045] Further, the rotational driving force generated by the above-mentioned bobbin holder motor 54 is transmitted to the first attachment portion 61a of the holder main body 61. This rotates the core member 62. Note that the rotational driving force generated by the bobbin holder motor 54 may be directly transmitted to the core member 62.

[0046] The configurations and shapes of the holder body 61 and the core member 62 described above are merely examples and can be changed as appropriate. For example, the holder body 61 and the core member 62 may be attached so as not to slide. The core member 62 may also be a hollow member (i.e., a circular pipe).

[0047] Next, a holding structure 70 for holding the bobbin 91 on the cylindrical portion 61c of the holder main body 61 will be described with reference mainly to Figures 5 and 6. As shown in Figures 5 and 6, the holding structure 70 includes a through hole 71, a protruding piece 72, a contact member 73, a sliding piece 74, and a spring 75.

[0048] The through holes 71 are through-holes formed in the cylindrical portion 61c. The axial direction of the through holes 71 is the same as the radial direction of the cylindrical portion 61c. A plurality of the through holes 71 are formed and lined up in the circumferential direction. Furthermore, two through holes 71 are formed in the axial direction for one bobbin 91. Note that the number and layout of the through holes 71 in this embodiment are merely an example, and the number or layout of the through holes 71 may be different from that in this embodiment.

[0049] The protruding piece 72 is inserted into the through hole 71 and is attached so as to be movable relative to the through hole 71. The movement direction of the protruding piece 72 is the same as the axial direction of the through hole 71 and the same as the radial direction of the cylindrical portion 61c.

[0050] A contact member 73 is attached to the radially outer surface of the protruding piece 72. The contact member 73 is made of rubber, urethane, soft resin, or the like, and is an elastically deformable member. When the protruding piece 72 slides radially outward, the contact member 73 presses the inner wall surface of the bobbin 91 radially outward. This allows the bobbin 91 to be held in the cylindrical portion 61c. Note that 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.

[0051] The slide piece 74 is attached to the core member 62. When the core member 62 slides in the axial direction, the slide piece 74 also slides in the axial direction integrally with the core member 62. The slide piece 74 is formed at a position corresponding to the protruding piece 72. In detail, the radially inner surface of the protruding piece 72 and the radially outer surface of the slide piece 74 are in contact with each other. In addition, the spring 75 is disposed between adjacent slide pieces 74.

[0052] Here, an inclined surface inclined with respect to the axial direction is formed on the radial inner side of the protruding piece 72. And an inclined surface corresponding to the inclined surface of the protruding piece 72 is formed on the radial outer side of the slide piece 74. As described above, the inclined surface of the protruding piece 72 and the inclined surface of the slide piece 74 contact each other. With this configuration, the slide piece 74 slides in the axial direction (specifically, toward the base end side) together with the core member 62, so that 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. This allows the bobbin 91 to be held in the bobbin holder 41.

[0053] As described above, the core member 62 is pressed toward the base end in the axial direction by the biasing member 63. Therefore, the bobbin 91 can be held in the bobbin holder 41 without using the power of an actuator. Note that the holding of the bobbin 91 can be released by sliding the core member 62 toward the tip end by an actuator (not shown, for example, a cylinder or a motor).

[0054] The holding structure 70 of this embodiment is just an example, and the bobbin 91 may be held in the bobbin holder 41 by a holding structure different from that of this embodiment.

[0055] Next, an explanation will be given of excessive vibrations occurring in the bobbin holder 41 and a configuration for suppressing the vibrations.

[0056] The yarn winding machine 1 of this embodiment winds the yarn 93 onto a large number of bobbins 91 at the same time in order to achieve high production efficiency. Therefore, the axial length of the bobbin holder 41 of this embodiment is very long. On the other hand, if the core member 62 is supported by the holder body 61 only at the first end 62a and the second end 62b, the length of the portion not supported by the holder body 61 becomes long, and various vibration modes may occur. For example, a vibration mode may occur in which the midsection (e.g., the center) of the core member 62 in the longitudinal direction serves as the antinode of vibration. Vibrations due to this vibration mode have not been anticipated in the past. Therefore, if no measures are taken against this vibration, excessive vibrations may occur in the bobbin holder 41 depending on the rotation speed of the bobbin holder 41. Furthermore, if the axial length of the bobbin holder 41 is very long, the midsection of the core member 62 in the longitudinal direction is easily deformed due to various factors. For example, the core member 62 may be deformed by a reaction force of the 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 changes, and depending on the rotation speed of the bobbin holder 41, excessive vibration may be generated in the bobbin holder 41.

[0057] In order to suppress these excessive vibrations, the bobbin holder 41 of this embodiment includes one midway support part 80 shown in Figs. 5 to 7. The midway support part 80 is a member for supporting the midway part of the core member 62 on the holder body 61. As shown in Fig. 4, the midway support part 80 is disposed in the central region of the core member 62. The central region is the center of the axial direction of the core member 62, or a region where the deviation from the center is within 30% of the length of the core member. Since the above-mentioned excessive vibrations tend to originate from the center of the core member 62, by disposing the midway support part 80 in the central region, the above-mentioned excessive vibrations can be more reliably suppressed.

[0058] As described above, the holding structure 70 (particularly the slide piece 74) is disposed between the cylindrical portion 61c and the core member 62. Therefore, the intermediate support portion 80 is disposed at a position avoiding the slide piece 74. Specifically, as shown in FIG. 5 or FIG. 6, in the region where the intermediate support portion 80 is disposed, the slide piece 74 is divided into two in the axial direction, and the intermediate support portion 80 is disposed between these two slide pieces 74. This allows both the holding structure 70 and the intermediate support portion 80 to be achieved. In addition, the intermediate support portion 80 is in contact with the slide piece 74 directly or via the spring 75. Therefore, the intermediate support portion 80 is configured to be able to receive force from the slide piece 74 and to slide in the axial direction together with the slide piece 74.

[0059] The intermediate support portion 80 includes a base member 81. The base member 81 is a ring-shaped member. The base member 81 is disposed radially inside the cylindrical portion 61c and radially outside 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.

[0060] A first inner recess 81a, a second inner recess 81b, a first outer recess 81c, and a second outer recess 81d are formed in the base member 81. The first inner recess 81a and the second inner recess 81b are recesses formed on the radially inner surface of the base member 81, and are aligned in the axial direction. The first outer recess 81c and the second outer recess 81d are recesses formed on the radially outer surface of the base member 81, and are aligned in the axial direction.

[0061] A first inner O-ring 82a is disposed in the first inner recess 81a, and a second inner O-ring 82b is disposed in the second inner recess 81b. The first inner O-ring 82a and the second inner O-ring 82b contact the base member 81 and the core member 62. This improves the adhesion between the mid-support portion 80 and the core member 62.

[0062] A first outer O-ring 82c is disposed in the first outer recess 81c, and a second outer O-ring 82d is disposed in the second outer recess 81d. The first outer O-ring 82c and the second outer O-ring 82d contact the base member 81 and the cylindrical portion 61c. This improves the adhesion between the mid-support portion 80 and the cylindrical portion 61c.

[0063] In the intermediate support portion 80 of this embodiment, O-rings are arranged on both the inner and outer surfaces in the radial direction, so that the rattling of the core member 62 or the cylindrical portion 61c in the radial direction can be reduced. Furthermore, in the intermediate support portion 80 of this embodiment, O-rings are arranged side by side in the axial direction. In detail, the first inner O-ring 82a and the second inner O-ring 82b (i.e., a plurality of O-rings) are arranged side by side in the axial direction in one intermediate support portion 80, and the first outer O-ring 82c and the second outer O-ring 82d (i.e., a plurality of O-rings) are arranged side by side in the axial direction in one intermediate support portion 80. Therefore, the vibration of the core member 62 or the cylindrical portion 61c centered on the O-ring can be suppressed. Note that, in this embodiment, a plurality of O-rings are arranged on both the inner and outer surfaces in the radial direction of one intermediate support portion 80. The layout of the O-rings in this embodiment is an example, and can be changed as follows. For example, one or more O-rings may be disposed on the radially inner surface of one intermediate support part 80. One or more O-rings may be disposed on the radially outer surface of one intermediate support part 80. One O-ring may be disposed on each of the radially inner surface and the radially outer surface of one intermediate support part 80. One or more O-rings may be disposed on only one of the radially inner surface or the radially outer surface of one intermediate support part 80.

[0064] Next, the effect of the midway support portion 80 will be described with reference to FIG.

[0065] 8 shows a graph illustrating the change in vibration value when the rotation speed of the bobbin holder 41 is increased for a bobbin holder 41 with a midway support portion 80 and a bobbin holder 41 without a midway support portion 80. The vibration value is the total displacement caused by the vibration of the bobbin holder 41 per unit time. For example, the higher the vibration frequency or the larger the amplitude, the larger the vibration value.

[0066] As shown in Fig. 8, in the bobbin holder 41 without the midway support portion 80, the vibration value rises significantly when the rotation speed of the bobbin holder 41 exceeds a certain value. This is because the above-mentioned excessive vibration occurs. In contrast, in the bobbin holder 41 with the midway support portion 80, the vibration value remains low even after the rotation speed exceeds a certain value. From the above, it has been shown that excessive vibration can be suppressed by providing the midway support portion 80.

[0067] Next, a modified example of the above embodiment will be described with reference to Figures 9 and 10. In the description of this modified example, the same or similar members as those in the above embodiment are denoted by the same reference numerals in the drawings, and the description thereof may be omitted.

[0068] While the bobbin holder 41 in the above embodiment has one midway support portion 80, the bobbin holder 41 in this modified example has two midway support portions 80. The midway support portions 80 are respectively disposed on the tip end side and the base end side of the center of the core member 62 in the axial direction.

[0069] By disposing two intermediate support parts 80, the distance between the support points of the core member 62 is shortened. Therefore, it is possible that the occurrence of various vibration modes can be suppressed. Furthermore, when the intermediate support part 80 is inserted between the cylindrical part 61c and the core member 62 and attached, the farther the attachment position is from the axial end of the cylindrical part 61c, the more difficult the work of attaching the intermediate support part 80 tends to be. In this respect, in this modified example, the distance from the axial end of the cylindrical part 61c to the attachment position is shorter than in the above embodiment. Therefore, it is possible that the work of attaching the intermediate support part 80 becomes easier.

[0070] FIG. 10 shows a graph showing the change in vibration value when the rotation speed of the bobbin holder 41 is increased for the bobbin holder 41 of the above embodiment having one midway support part 80 and the bobbin holder 41 of this modified example having two midway support parts 80. As shown in FIG. 10, by providing two midway support parts 80, the vibration value can be reduced compared to the case where one midway support part 80 is provided. In addition, the rotation speed of the bobbin holder 41 at which the vibration value reaches the first peak differs between the case where there is one midway support part 80 and the case where there are two midway support parts 80. Therefore, the number of midway support parts 80 can be selected so that the vibration value is reduced at a frequently used rotation speed.

[0071] As described above, the bobbin holder 41 of this 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 thread winding arranged in the axial direction. The core member 62 is disposed inside the cylindrical portion 61c of the holder body 61, and a first end portion 62a and a second end portion 62b in the axial direction are supported by the holder body 61. The intermediate support portion 80 is disposed radially inside the cylindrical portion 61c and radially outside the core member 62, between the first end portion 62a and the second end portion 62b, and supports the core member 62 on the holder body 61.

[0072] As a result, the core member 62 is supported by the holder body 61 not only at the first end 62a and the second end 62b but also at the midway portion, thereby reducing vibrations caused by deformation of the core member 62 and vibrations with the midway portion of the core member 62 as an antinode. As a result, excessive vibrations of the bobbin holder 41 can be more reliably suppressed.

[0073] In the bobbin holder 41 of the present embodiment, a plurality of intermediate support portions 80 are arranged in the axial direction.

[0074] This allows the length of the portion of the core member 62 that is not supported by the holder body 61 to be shortened, so that excessive vibration of the bobbin holder 41 can be suppressed more reliably.

[0075] In the bobbin holder 41 of the present embodiment, the mid-support portion 80 is disposed at the center of the core member 62 in the axial direction, or at a position that is displaced from the center by 30% or less of the length of the core member 62 .

[0076] This allows the holder body 61 to support the portion of the core member 62 that is likely to deform or that is likely to become an antinode of vibration of the core member 62. Therefore, excessive vibration of the bobbin holder 41 can be suppressed more reliably.

[0077] In the bobbin holder 41 of this embodiment, the midway support portion 80 includes a base member 81 and O-rings (a first inner O-ring 82a, a second inner O-ring 82b, a first outer O-ring 82c, and a second outer O-ring 82d). The base member 81 is ring-shaped, and has recesses (a first inner recess 81a, a second inner recess 81b, a first outer recess 81c, and a second outer recess 81d) formed along the circumferential direction. The O-rings are attached to the recesses of the base member 81.

[0078] By providing the O-ring, the mid-way support portion 80 can be brought into close contact with the holder main body 61 side or the core member 62 side, so vibrations caused by rattling are unlikely to occur. Also, if only an O-ring is placed between the holder main body 61 and the core member 62, vibrations can occur due to deformation of the O-ring, but by providing the base member 81, the deformation of the O-ring can be reduced, so vibrations due to deformation of the O-ring are unlikely to occur.

[0079] In the bobbin holder 41 of the present embodiment, a plurality of O-rings of the intermediate support portion 80 are arranged side by side in the axial direction.

[0080] This makes it possible to stabilize the posture of the core member 62 compared to a case in which one O-ring is disposed in the axial direction, and makes it possible to more reliably suppress excessive vibration of the bobbin holder 41.

[0081] In the bobbin holder 41 of this embodiment, the midway support portion 80 includes an inner O-ring (first inner O-ring 82a, second inner O-ring 82b) and an outer O-ring (first outer O-ring 82c, second outer O-ring 82d) as O-rings. The inner O-ring is disposed so as to contact the core member 62 and the base member 81. The outer O-ring is disposed so as to contact the cylindrical portion 61c of the holder main body 61 and the base member 81.

[0082] With this, since the O-rings are disposed on both the core member 62 side and the holder main body 61 side, vibrations caused by rattling are unlikely to occur.

[0083] The bobbin holder 41 of this embodiment includes a holding structure 70 that holds the bobbin 91 on 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 body 61 and is capable of protruding radially outward from the holder body 61. The sliding piece 74 is provided on the core member 62 and slides along the axial direction to press the protruding piece 72 radially outward. The mid-way support portion 80 is disposed between the sliding pieces 74 in the axial direction.

[0084] By disposing the intermediate support portion 80 between the slide pieces 74, it is possible to achieve both the holding structure 70 for the bobbin 91 and the intermediate support portion 80.

[0085] 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 drives and rotates the bobbin holder 41 to wind the elastic yarn onto each of the bobbins 91 held by the bobbin holder 41.

[0086] This makes it possible to realize the yarn winding machine 1 capable of suppressing excessive vibration of the bobbin holder 41.

[0087] The preferred embodiment and modifications of the present invention have been described above, but the above configurations can be modified, for example, as follows.

[0088] The number of midway support parts 80 provided in the bobbin holder 41 is not limited to one or two, and may be three or more. The positions of the midway support parts 80 described above are merely examples and may be changed as appropriate. For example, when one midway support part 80 is provided, the midway support part 80 may be disposed at a position outside the central region. When two or more midway support parts 80 are provided, the midway support parts 80 may be disposed asymmetrically in the axial direction.

[0089] Although the traverse device 21 in the above embodiment is of a cam drum type, a different configuration may be used as long as it is possible to reciprocate the traverse guide 23 in the winding width direction. For example, instead of the traverse device 21, a belt-type traverse device may be used.

[0090] In the above embodiment, an example has been described in which the present invention is applied to a yarn winding machine that winds up yarn produced by a spinning machine. However, the present invention can also be applied to a false twisting machine or a rewinding machine instead of the yarn winding machine. [Explanation of symbols]

[0091] 1 Yarn winding machine 41 Bobbin holder 61 Holder body 61c Cylindrical part 62 Core material 70 Retention structure 80 Midway support part

Claims

1. A holder body including a cylindrical section that holds multiple bobbins for winding thread arranged in the axial direction, A core member is disposed inside the cylindrical portion of the holder body, with its first and second axial ends supported by the holder body, An intermediate support portion is located radially inside the cylindrical portion and radially outside the core member, between the first end and the second end, and supports the core member on the holder body, A bobbin holder characterized by having the following features.

2. A bobbin holder according to claim 1, The bobbin holder is characterized in that the intermediate support portion is arranged in multiple locations in the axial direction.

3. A bobbin holder according to claim 1, The bobbin holder is characterized in that the intermediate support portion is positioned at the axial center of the core member, or at a position where the deviation from the center is within 30% of the length of the core member.

4. The bobbin holder according to claim 2, The bobbin holder is characterized in that the intermediate support portion is positioned at the axial center of the core member, or at a position where the deviation from the center is within 30% of the length of the core member.

5. A bobbin holder according to any one of claims 1 to 4, The aforementioned intermediate support portion is A base member that is ring-shaped and has a recess formed along the circumferential direction, An O-ring is attached to the recess of the base member, A bobbin holder characterized by having the following features.

6. The bobbin holder according to claim 5, The bobbin holder is characterized in that the O-rings of the intermediate support portion are arranged in a row in the axial direction.

7. The bobbin holder according to claim 5, The aforementioned intermediate support portion is, as the O-ring, The core member and the inner O-ring are arranged to contact the base member, The holder body has an outer O-ring that is positioned to contact the cylindrical portion and the base member, A bobbin holder characterized by having the following features.

8. A bobbin holder according to any one of claims 1 to 4, The holder body is provided with a holding structure for holding the bobbin, The aforementioned retaining structure is A protruding piece is provided on the holder body and is capable of protruding radially outward from the holder body, A slide piece provided on the core member, which slides along the axial direction to press the protruding piece radially outward, Equipped with, The bobbin holder is characterized in that the intermediate support portion is positioned between the slide pieces in the axial direction.

9. The bobbin holder according to claim 5, The holder body is provided with a holding structure for holding the bobbin, The aforementioned retaining structure is A protruding piece is provided on the holder body and is capable of protruding radially outward from the holder body, A slide piece provided on the core member, which slides along the axial direction to press the protruding piece radially outward, Equipped with, The bobbin holder is characterized in that the intermediate support portion is positioned between the slide pieces in the axial direction.

10. The bobbin holder according to claim 6, The holder body is provided with a holding structure for holding the bobbin, The aforementioned retaining structure is A protruding piece is provided on the holder body and is capable of protruding radially outward from the holder body, A slide piece provided on the core member, which slides along the axial direction to press the protruding piece radially outward, Equipped with, The bobbin holder is characterized in that the intermediate support portion is positioned between the slide pieces in the axial direction.

11. The bobbin holder according to claim 7, The holder body is provided with a holding structure for holding the bobbin, The aforementioned retaining structure is A protruding piece is provided on the holder body and is capable of protruding radially outward from the holder body, A slide piece provided on the core member, which slides along the axial direction to press the protruding piece radially outward, Equipped with, The bobbin holder is characterized in that the intermediate support portion is positioned between the slide pieces in the axial direction.

12. A bobbin holder according to any one of claims 1 to 4, A drive unit that rotates the bobbin holder to wind elastic thread onto each of the multiple bobbins held by the bobbin holder, A thread winding machine characterized by being equipped with the following features.

13. The bobbin holder according to claim 5, A drive unit that rotates the bobbin holder to wind elastic thread onto each of the multiple bobbins held by the bobbin holder, A thread winding machine characterized by being equipped with the following features.

14. The bobbin holder according to claim 6, A drive unit that rotates the bobbin holder to wind elastic thread onto each of the multiple bobbins held by the bobbin holder, A thread winding machine characterized by being equipped with the following features.

15. The bobbin holder according to claim 7, A drive unit that rotates the bobbin holder to wind elastic thread onto each of the multiple bobbins held by the bobbin holder, A thread winding machine characterized by being equipped with the following features.

16. The bobbin holder according to claim 8, A drive unit that rotates the bobbin holder to wind elastic thread onto each of the multiple bobbins held by the bobbin holder, A thread winding machine characterized by being equipped with the following features.

17. The bobbin holder according to claim 9, A drive unit that rotates the bobbin holder to wind elastic thread onto each of the multiple bobbins held by the bobbin holder, A thread winding machine characterized by being equipped with the following features.

18. The bobbin holder according to claim 10, A drive unit that rotates the bobbin holder to wind elastic thread onto each of the multiple bobbins held by the bobbin holder, A thread winding machine characterized by being equipped with the following features.

19. The bobbin holder according to claim 11, A drive unit that rotates the bobbin holder to wind elastic thread onto each of the multiple bobbins held by the bobbin holder, A thread winding machine characterized by being equipped with the following features.

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