thread winding machine

Abstract

The cover protects the motor while effectively cooling it even if it moves relative to the fixed fan. [Solution] The system includes a first moving mechanism and a second moving mechanism for moving the contact roller 25, a contact roller motor 32 attached to the front end of the contact roller 25 for rotational driving the contact roller 25, a front cover 26 having a base 26a that is positioned on the opposite side of the contact roller 25 from the contact roller 25 with the contact roller motor 32 in between in the front-rear direction and has an opening 26a1, and a fan 33 that is attached to the front cover 26 with the opening 26a1 positioned thereon and sends cooling air toward the contact roller motor 32 in the front-rear direction. The fan 33 is positioned such that at least a part of its outlet overlaps with the contact roller motor 32, which is within the range of movement of the contact roller motor 32 when viewed from the front-rear direction.

Description

Technical Field

[0001] The present invention relates to a winding machine for winding yarn onto a bobbin.

Background Art

[0002] Patent Document 1 discloses a winding machine that winds a plurality of yarns onto a plurality of bobbins mounted on a bobbin holder to form a plurality of packages. Such a winding machine includes a contact roller that can contact the plurality of packages, and a contact roller motor that rotationally drives the contact roller. The contact roller rotates while applying contact pressure to the outer peripheral surface of the package to adjust the shape of the package. Further, a part (cover member) of the second housing that supports the contact roller is located on one side of the contact roller in the extending direction of the contact roller (hereinafter simply referred to as the "extending direction").

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a winding machine as described above, it is difficult to employ a large motor for the motor that rotationally drives the contact roller due to space limitations. Therefore, in order not to increase the load on the motor, the contact roller employs a roller with a relatively small diameter to reduce the weight. However, since the diameter of the contact roller is small, it is necessary to increase the rotational speed of the contact roller, and the load on the motor remains large. Thus, the motor that rotationally drives the contact roller has a large amount of heat generation due to such a large load, and there is a problem that internal components such as couplings are damaged earlier due to heat.

[0005] Therefore, the inventors of the present invention considered providing a fan to cool the motor that rotates the contact roller. The motor is generally attached to one end of the contact roller in the extension direction. That is, the motor is positioned between the contact roller and the cover member described above in the extension direction. In this case, it is conceivable to form an opening that penetrates the cover member in the extension direction and place the fan in this opening. This allows the fan to draw in air from outside the cover member and send cooling air to the motor inside the cover member.

[0006] Generally, contact rollers are configured to be movable in order to adjust the amount of contact pressure applied to the package. Therefore, a motor attached to one end of the contact roller in the stretching direction moves along with the movement of the contact roller.

[0007] When a fan is attached to the motor to cool it, the fan moves along with the motor as the contact roller moves. Therefore, a large opening needs to be formed in the cover member so that the fan can move within the opening of the cover member. The cover member has the role of protecting the motor from oil and fibrous debris, but forming a large opening prevents it from fully performing this role. For this reason, the inventors of the present invention are considering attaching the fan to the cover member. In this case, since the motor moves relative to the fan, it is difficult to uniquely determine the mounting position of the fan that is effective in cooling the motor.

[0008] The object of the present invention is to provide a thread winding machine that can effectively cool the motor even when the motor moves relative to a fixed fan, while protecting the motor with a cover member. [Means for solving the problem]

[0009] The first invention relates to a yarn winding machine that winds a plurality of yarns onto a plurality of bobbins to form a plurality of packages, comprising: a bobbin holder on which the plurality of bobbins are mounted; a contact roller extending at least in a predetermined stretching direction and applying contact pressure to the outer circumferential surface of the plurality of packages; a moving mechanism for moving the contact roller; a motor attached to one end of the contact roller in the stretching direction and rotating the contact roller; a cover member having a portion positioned on the opposite side of the motor from the contact roller with respect to the stretching direction and having an opening formed therethrough in the stretching direction, covering the motor; and the cover The component is attached to the cover member in a position positioned at the opening of the component and includes a fan that sends cooling air toward the motor in the extension direction, the moving mechanism moves the contact roller such that at least one of the axial position of the contact roller and the position of the contact roller in a virtual plane perpendicular to the extension direction changes, the motor moves inside the cover member as the contact roller is moved by the moving mechanism, and the fan is positioned such that at least a portion of the outlet overlaps with the motor, which is located within the range of movement of the motor when the contact roller is moved by the moving mechanism, as viewed from the extension direction.

[0010] In this invention, since the fan is attached to the cover member, there is no need to form a large opening in the cover member, as is the case when the fan is attached to the motor. Therefore, the motor can be protected by the cover member. Furthermore, the fan's outlet is positioned such that, when viewed from the extension direction, at least a portion of it overlaps with the motor, which is within the motor's range of movement when the contact roller is moved by the moving mechanism. Therefore, even when the motor moves relative to a fixed fan, the cooling air from the fan can be reliably directed at the motor, effectively cooling it.

[0011] In the yarn winding machine according to the second invention, the first invention includes a flow straightening member that is positioned between the fan and the contact roller with respect to the stretching direction, and is located around the motor as viewed from the stretching direction, and straightens the cooling air sent out from the fan.

[0012] In this invention, the rectifier member prevents the cooling air sent from the fan from flowing away from the motor when viewed from the extension direction. Therefore, the cooling air sent from the fan is reliably directed around the motor, allowing the motor to be cooled more effectively.

[0013] In the thread winding machine according to the third invention, in the second invention, the rectifier member is positioned opposite at least a portion of the motor with respect to a direction perpendicular to the stretching direction.

[0014] In this invention, the rectifier member causes the cooling air blown out from the fan to flow through the gap between the motor and the rectifier member. Therefore, the motor can be cooled more effectively.

[0015] In the thread winding machine according to the fourth invention, in the third invention, the rectifying member is arranged to span across one end of the motor in the stretching direction.

[0016] In this invention, the portion of the rectifier member on one side of the motor in the extension direction allows the cooling air sent from the fan to be directed into the gap between the motor and the rectifier member. Therefore, the motor can be cooled more effectively.

[0017] In the thread winding machine according to the fifth invention, the rectifier member is attached to the motor in any of the second to fourth inventions.

[0018] In this invention, the positional relationship between the rectifier member and the motor remains unchanged even when the motor moves. Therefore, interference between the rectifier member and the motor can be reliably prevented.

[0019] In the take-up machine according to the sixth invention, in the fifth invention, at least a part of the rectifying member is formed in an arc shape concentric with the motor as viewed from the stretching direction.

[0020] In the present invention, the motor can be cooled as uniformly as possible.

[0021] In the take-up machine according to the seventh invention, in the fifth or sixth invention, the rectifying member is arranged at a position not facing the fan in the direction orthogonal to the stretching direction.

[0022] In the present invention, even when the motor moves, interference between the rectifying member and the fan can be avoided.

[0023] In the take-up machine according to the eighth invention, in any one of the fifth to seventh inventions, the rectifying member rectifies the cooling air sent out from the fan so as to flow along the axial direction of the contact controller.

[0024] In the present invention, the motor can be cooled more effectively by the cooling air flowing along the axial direction of the contact controller.

[0025] In the take-up machine according to the ninth invention, in the eighth invention, the motor is formed with protruding fins extending along the axial direction.

[0026] In the present invention, the rectifying member causes the cooling air sent out from the fan to flow along the direction in which the fins extend. Therefore, the cooling effect by the fins can be fully exerted.

[0027] In the yarn take-up machine according to the tenth invention, in any one of the second to ninth inventions, the cover member is formed in a box shape with an opening on the other side in the stretching direction, the rectifying member is disposed inside the cover member, the cover member is disposed around a part of the motor as viewed from the stretching direction, and has a rectifying portion for rectifying the cooling air sent out from the fan, and the rectifying member is disposed in a portion around the motor where the rectifying portion is not disposed as viewed from the stretching direction.

[0028] In the present invention, by disposing the rectifying member in a portion around the motor where the rectifying portion of the cover member is not disposed, the cooling air sent out from the fan can be rectified in a wider range around the motor. Therefore, the motor can be cooled more effectively.

[0029] In the yarn take-up machine according to the eleventh invention, in any one of the first to tenth inventions, the bobbin holder is rotatably supported in a cantilever manner and a turret that can also rotate, turret driving means for rotating the turret, and a control unit are provided. In the initial stage of winding start from the start of winding of the yarn onto the bobbin until the winding diameter of the package reaches a predetermined size, the control unit controls the moving mechanism to move the contact roller according to the winding thickness of the package. After the winding diameter of the package reaches the predetermined size, during the main winding period until the package is fully wound, the control unit controls the turret driving means to rotate the turret according to the winding thickness of the package to move the package, and the fan is arranged such that the center of the air outlet coincides with the center of the motor during the main winding period as viewed from the stretching direction.

[0030] In the present invention, during the main winding period, the cooling air from the fan can be more surely applied to the motor to effectively cool the motor.

Brief Description of the Drawings

[0031] [Figure 1] It is a side view of a take-up device having a yarn take-up machine according to the present embodiment. [Figure 2] This is a front view of a thread winding machine. [Figure 3] (a) is a diagram illustrating the first movement mechanism, and (b) is a diagram illustrating the second movement mechanism. [Figure 4] This diagram illustrates the positional relationship between the contact roller motor and the fan outlet. (a) shows the state during the main winding phase, and (b) shows the state where the contact roller is in its initial position. [Figure 5] This is a cross-sectional view of the contact roller motor and its vicinity in a plane perpendicular to the left-right direction. [Figure 6] This is a perspective view of a contact roller motor. [Figure 7] This table shows the results of comparative tests conducted to confirm the cooling effect. [Figure 8] This diagram shows the positional relationship between the rectifier member and the contact roller motor in one modified example. [Modes for carrying out the invention]

[0032] (Outline configuration of the collection device) First, the thread winding machine 4 according to this embodiment will be described with reference to Figure 1. Figure 1 is a side view of the thread winding machine 1. Hereinafter, the left-right direction in Figure 1 will be referred to as the front-back direction, and the direction perpendicular to the plane of the paper will be referred to as the left-right direction. The direction perpendicular to both the front-back direction and the left-right direction will be referred to as the up-down direction (vertical direction) where gravity acts. The front-back direction and the left-right direction are directions that are approximately parallel to the horizontal direction.

[0033] The take-up device 1 is configured to take up multiple yarns Y spun from the spinning device 3 and wind them onto multiple bobbins B to form multiple packages P. The spinning device 3 extrudes, for example, a molten polymer which is the material of the yarn Y. The material of the yarn Y is, for example, a polyester-based material such as PET, but is not limited to this. The yarn Y is, for example, a monofilament yarn consisting of a single filament, but is not limited to this. The take-up device 1 mainly comprises a first godet roller 11, a second godet roller 12, and a yarn winder 4.

[0034] The first godet roller 11 is a roller whose axial direction is approximately parallel to the left-right direction. The first godet roller 11 is located, for example, below the spinning apparatus 3. The first godet roller 11 is located above the front end of the yarn winding machine 4. Multiple yarns Y are wound onto the first godet roller 11 in a left-right direction. The first godet roller 11 is rotationally driven by a motor (not shown). As a result, the first godet roller 11 feeds the multiple yarns Y downstream in the yarn travel direction.

[0035] The second godet roller 12 is a roller whose axial direction is approximately parallel to the left-right direction. The second godet roller 12 is positioned downstream of the first godet roller 11 in the yarn travel direction. The second godet roller 12 is positioned above and behind the first godet roller 11. The second godet roller 12 is rotationally driven by a motor (not shown). As a result, the second godet roller 12 feeds the yarn Y downstream in the yarn travel direction.

[0036] The yarn winding machine 4 winds multiple threads Y onto multiple bobbins B to form multiple packages P. The yarn winding machine 4 is located downstream of the second godet roller 12 in the thread travel direction. The yarn winding machine 4 is located below the second godet roller 12.

[0037] (Thread winding machine) Next, the thread winding machine 4 will be explained with further reference to Figures 2 and 3. Figure 2 is a front view of the thread winding machine 4. Note that in Figure 2, only the outer shape of the front cover 26, which will be described later, is shown with a dashed line.

[0038] As shown in Figures 1 and 2, the thread winding machine 4 mainly comprises a machine base 20, a plurality of pivot guides 21, a plurality of traverse guides 22, a turret 23, two bobbin holders 24, a contact roller 25, a contact roller motor 32 (motor of the present invention), a fan 33, and a front cover 26 (cover member of the present invention). Furthermore, each part of the thread winding machine 4 is controlled by a control unit 5.

[0039] As shown in Figure 1, the machine base 20 has a machine base body 20a located at the rear end of the thread winding machine 4, and a support 20b fixed to the upper part of the machine base body 20a and extending forward. The machine base body 20a supports the turret 23, etc. The support 20b supports the contact roller 25 and a plurality of traverse guides 22.

[0040] Multiple pivot guides 21 are individually provided for each of the multiple threads Y and are arranged in the front-to-back direction. The multiple pivot guides 21 are attached to a guide support member 28 supported by a support body 20b. Each of the multiple pivot guides 21 is hung on a different thread Y, and each of the multiple threads Y becomes a pivot point when the threads Y are spun.

[0041] Multiple traverse guides 22 are individually provided for multiple threads Y and are arranged in the front-to-back direction. The multiple traverse guides 22 are driven by a traverse motor (not shown) and move back and forth in the front-to-back direction. As a result, the threads Y that are placed on the traverse guides 22 are traversed around the pivot guide 21 as a pivot point.

[0042] The turret 23 is a disc-shaped member whose axial direction is approximately parallel to the front-rear direction. The turret 23 is rotatably supported on the machine base body 20a. The turret 23 rotatably cantilever-supports two bobbin holders 24. The turret 23 is rotationally driven by a turret motor 23a (turret driving means). The turret 23 moves the two bobbin holders 24 by rotating around a pivot axis approximately parallel to the front-rear direction. This makes it possible to swap the positions of the two bobbin holders 24 in the thread winding machine 4. While thread Y is being wound onto a bobbin B mounted on one bobbin holder 24, it is possible to replace the bobbin B on the other bobbin holder 24.

[0043] The two bobbin holders 24 are each designed to hold multiple bobbins B. Both bobbin holders 24 extend forward from the turret 23. Each of the two bobbin holders 24 is rotatably supported at the upper and lower ends of the turret 23, which is supported by the machine base body 20a. In other words, the two bobbin holders 24 are cantilevered by the machine base body 20a located at the rear. The axial directions of the two bobbin holders 24 are approximately parallel to the front-to-back direction. The tip side (front end) of the bobbin holder 24 is generally the work side where operations such as attaching bobbins B to the bobbin holder 24 are performed.

[0044] Each bobbin holder 24 is equipped with multiple bobbins B, each individually provided for multiple threads Y, arranged in a front-to-back direction. For example, one bobbin holder 24 can hold 16 bobbins B. Furthermore, each of the two bobbin holders 24 is rotated by an individual winding motor (not shown).

[0045] In its initial position, which is the starting position for winding yarn Y onto bobbin B, the contact roller 25 has its axial direction approximately parallel to the front-to-back direction. The contact roller 25 can be moved from its initial position to an inclined position relative to the horizontal direction (front-to-back direction) by a second moving mechanism 47, which will be described later. Even when the contact roller 25 is inclined by the second moving mechanism 47, it extends at least in the front-to-back direction (the extension direction of the present invention).

[0046] The contact roller 25 is positioned directly above the upper bobbin holder 24. The contact roller 25 is rotatably supported on the support 20b by a roller support mechanism 40, which will be described later. Details of the support configuration of the contact roller 25 will be described later. The contact roller 25 is rotationally driven by a contact roller motor 32 (see Figure 1). When the yarn Y is wound, the contact roller 25 rotates while contacting the outer circumferential surfaces of the multiple packages P supported by the upper bobbin holder 24. As a result, the contact roller 25 applies contact pressure to the outer circumferential surfaces of the packages P during winding, thereby shaping the packages P.

[0047] The contact roller motor 32 transmits power to the contact roller 25 via the coupling 35 (see Figure 5), thereby rotating the contact roller 25. The contact roller motor 32 is mounted on the front end of the contact roller 25, as shown in Figure 1. The fan 33 is positioned in front of the contact roller motor 32. The fan 33 blows cooling air toward the contact roller motor 32 side (rear side) in the front-rear direction.

[0048] As shown in Figure 1, the front cover 26 is provided at the front end of the support 20b. The front cover 26 is provided with an input unit 27 for the operator to input instructions to the yarn winding machine 4. The input unit 27 consists of, for example, operation buttons or a touch panel. The front cover 26 is, for example, a member that covers at least a part of the components of the yarn winding machine 4 from the front. In this embodiment, the front cover 26 has the role of protecting the contact roller motor 32 and the circuit board (not shown) electrically connected to the input unit 27 from oil and fiber debris. The front cover 26 supports the fan 33.

[0049] In the yarn winding machine 4 having the above configuration, when the upper bobbin holder 24 is rotated, the yarn Y spun by the traverse guide 22 is wound onto the bobbin B to form a package P. While the package P is being formed, the contact roller 25, which is rotated by the contact roller motor 32, contacts the outer surface of the package P and applies contact pressure, thereby shaping the package P. When the package P is fully wound, the turret 23 is rotated, causing the upper and lower positions of the two bobbin holders 24 to be swapped. As a result, the bobbin holder 24 that was located on the lower side moves to the upper side, and the yarn Y can be wound onto the bobbin B attached to this bobbin holder 24 to form another package P. The bobbin holder 24 with the fully wound package P attached moves to the lower side. The fully wound package P is collected by, for example, a package recovery device (not shown).

[0050] (Contact roller support configuration) Here, with further reference to Figures 3 and 4, the support configuration of the contact roller 25 will be described. The contact roller 25 is supported on the support body 20b via a roller support mechanism 40. As shown in Figures 1 and 3(a) and (b), the roller support mechanism 40 has, for example, support portions 41 and 42, arm portions 43 and 44, and a pivot shaft 45. Support portion 41 rotatably supports the contact roller 25 at its front end. Support portion 42 rotatably supports the contact roller 25 at its rear end. One end of arm portion 43 is connected to support portion 41 and extends toward the support body 20b in a direction perpendicular to the front-rear direction. One end of arm portion 44 is connected to support portion 42 and extends toward the support body 20b in a direction perpendicular to the front-rear direction. The pivot shaft 45 extends in the front-rear direction. The pivot shaft 45 has its front end connected to the other end of the arm portion 43 and its rear end connected to the other end of the arm portion 44. The pivot shaft 45 is pivotably supported by the support 20b at both its front and rear ends.

[0051] The roller support mechanism 40 has a first moving mechanism 46 that moves the contact roller 25 from its initial position to adjust the magnitude of the contact pressure applied to the package P (see Figure 3(a)). The first moving mechanism 46 moves the contact roller 25 so that its position changes in a virtual plane perpendicular to the front-rear direction. When the contact roller 25 is moved by the first moving mechanism 46, the contact roller 25 does not change in the axial direction but moves in parallel. In this embodiment, the first moving mechanism 46 swings the arm portion 43 around the pivot axis 45. The first moving mechanism 46 is, for example, a fluid cylinder such as an air cylinder. A motor may be used as the first moving mechanism 46.

[0052] As shown in Figure 3(a), increasing the output of the first moving mechanism 46 applies a counterclockwise swinging force to the arm portion 43. At this time, a force is applied to the contact roller 25 that moves (upwards) from the position shown by the solid line to the position shown by the dashed line. This reduces the contact pressure on the package P. Conversely, decreasing the output of the first moving mechanism 46 applies a clockwise swinging force to the arm portion 43 due to gravity. At this time, a force is applied to the contact roller 25 that moves (downwards) from the position shown by the dashed line to the position shown by the solid line. This increases the contact pressure on the package P.

[0053] During the initial winding phase, from the start of winding the yarn Y onto the bobbin B until the package P reaches a predetermined winding diameter, the control unit 5 controls the first moving mechanism 46 to raise the contact roller 25 in accordance with the expansion of the package P. After the package P reaches a predetermined winding diameter, during the main winding phase until the package P is fully wound, the control unit 5 controls the turret motor 23a to rotate the turret 23 in accordance with the expansion of the package P, thereby lowering the package P. In other words, the amount of movement of the contact roller 25 by the first moving mechanism 46 is large during the initial winding phase and small during the main winding phase. Note that this control may also be performed by a control unit other than the control unit 5 that controls each part of the yarn winding machine 4, such as a control unit that controls the entire take-up device 1.

[0054] Here, as the yarn Y is wound onto the bobbin B and the package P thickens, the weight of the package P causes the cantilevered bobbin holder 24 to bend downward, with the front portion sagging significantly. In other words, the bobbin holder 24 tilts with respect to the horizontal direction (front-to-back direction). If the bobbin holder 24 and the contact roller 25 are no longer kept parallel, the contact pressure will differ between multiple packages P, which may result in variations in quality between packages P. For this reason, the roller support mechanism 40 has a second moving mechanism 47 that moves the contact roller 25 so that it tilts with respect to the horizontal direction (front-to-back direction) in accordance with the thickness of the package P (see Figure 3(b)). In other words, the second moving mechanism 47 moves the contact roller 25 so that the degree of tilt of the axial direction of the contact roller 25 with respect to the horizontal direction (front-to-back direction) changes. The axial direction of the contact roller 25 in its initial position (axial direction is approximately parallel to the front-to-back direction) changes to tilt with respect to the front-to-back direction when moved by the second moving mechanism 47.

[0055] In this embodiment, the second moving mechanism 47 moves the rear end of the oscillating shaft 45 up and down. The second moving mechanism 47 is, for example, a fluid cylinder such as an air cylinder. A motor may also be used as the second moving mechanism 47. In Figure 3(b), the roller support mechanism 40 is shown by a solid line when the contact roller 25 is in its initial position. As shown in Figure 3(b), the contact roller 25 can be tilted by raising the rear end of the oscillating shaft 45 from the position shown by the solid line to the position shown by the dashed line using the second moving mechanism 47. Specifically, the contact roller 25 is tilted so that its rear end is positioned upward and its front end is positioned relatively downward.

[0056] When the contact roller 25 is moved by the first moving mechanism 46 and the second moving mechanism 47, the contact roller motor 32 attached to the contact roller 25 also moves. At this time, the contact roller motor 32 moves inside the front cover 26. The amount of movement of the contact roller 25 by the second moving mechanism 47 is relatively small. Therefore, after the contact roller 25 is moved significantly by the first moving mechanism 46 at the beginning of winding, it moves only slightly during the main winding period to adjust the contact pressure. Thus, it is preferable to determine the position of the fan 33 that cools the contact roller motor 32 based on the position of the contact roller motor 32 during the main winding period. In this embodiment, during the main winding period, the fan 33 is positioned so that the center of the contact roller motor 32 and the center of the fan outlet 33a are approximately coincident when viewed from the front-rear direction. Even during the main winding period, the contact roller motor 32 moves slightly due to the slight movement of the contact roller 25. The center of the fan outlet 33a only needs to be within the range of movement of the center of the contact roller motor 32 during the main winding period when viewed from the front-rear direction.

[0057] (Contact roller motor and its surrounding configuration) Next, the configuration of the contact roller motor 32 and its vicinity will be described in more detail with further reference to Figures 5 and 6. Figure 5 shows the contact roller 25 in its initial position, with the axial direction of the contact roller 25 being in the front-rear direction. In the following description and in Figures 5 and 6, the axial direction of the contact roller 25 will simply be referred to as "axial direction".

[0058] As shown in Figure 5, the rotor 32a of the contact roller motor 32 is attached to the front end of the rotating shaft 25a of the contact roller 25 via a coupling 35. As shown in Figure 6, multiple protruding fins 32b extending along the axial direction are formed on the outer circumferential surface of the contact roller motor 32. The multiple fins 32b are arranged in a line in the circumferential direction of the contact roller motor 32.

[0059] As shown in Figure 5, a portion of the front surface of the contact roller motor 32 is a mounting surface 32c to which a support member 53 for supporting the flow straightening member 50 (described later) is attached to the contact roller motor 32. The mounting surface 32c is a recessed surface compared to the rest of the front surface of the contact roller motor 32.

[0060] As shown in Figure 5, the front cover 26 is composed of a base portion 26a and a side portion 26b. The base portion 26a is plate-shaped with thickness in the front-rear direction. The side portion 26b extends rearward from the edge of the base portion 26a. The side portion 26b extends from the entire circumference of the base portion 26a. That is, the side portion 26b is annular when viewed from the front-rear direction. The front cover 26 is formed in a box shape with an open rear side by the base portion 26a and the side portion 26b. The base portion 26a is positioned on the opposite side of the contact roller 25 from the contact roller motor 32 in the front-rear direction. The base portion 26a has an opening 26a1 that penetrates in the front-rear direction.

[0061] The fan 33 is mounted on the front cover 26, positioned at the opening 26a1 of the base 26a of the front cover 26. In this embodiment, the fan 33 is an axial flow fan. The fan 33 may also be a blower fan or a cross-flow fan. When the contact roller 25 is in its initial position, the distance L1 in the front-rear direction between the mounting surface 32c of the contact roller motor 32 and the fan 33 is 45 mm.

[0062] As described above, during the winding phase, the fan 33 is positioned such that, as shown in Figure 4(a), the center of the outlet 33a approximately coincides with the center of the contact roller motor 32 when viewed from the front-rear direction. Furthermore, the fan 33 is positioned such that at least a portion of the outlet 33a overlaps with the contact roller motor 32 when the contact roller 25 is moved by the first moving mechanism 46 and the second moving mechanism 47, when viewed from the front-rear direction. For example, when the contact roller 25 is in its initial position, as shown in Figure 4(b), at least a portion of the outlet 33a overlaps with the contact roller motor 32 when viewed from the front-rear direction. Regardless of the position of the contact roller motor 32 within its range of motion, at least a portion of the outlet 33a overlaps with the contact roller motor 32 when viewed from the front-rear direction.

[0063] As shown in Figure 6, the contact roller motor 32 is fitted with a flow straightening member 50 that straightens the cooling air sent out from the fan 33. The flow straightening member 50 straightens the cooling air sent out from the fan 33 so that it flows along the axial direction (i.e., the direction in which the fins 32b extend).

[0064] As shown in Figure 5, the rectifier member 50 is positioned inside the front cover 26, between the fan 33 and the contact roller 25 in the front-rear direction. The rectifier member 50 is positioned so as not to face the fan 33 in directions perpendicular to the front-rear direction (left-right and up-down directions). The rectifier member 50 is positioned to straddle the front end of the contact roller motor 32 in the front-rear direction. That is, the front portion of the rectifier member 50 does not face the contact roller motor 32 in directions perpendicular to the front-rear direction (left-right and front-rear directions). The rear portion of the rectifier member 50 faces a part of the contact roller motor 32 in directions perpendicular to the front-rear direction (left-right and front-rear directions). The surface of the rectifier member 50 that faces the contact roller motor 32 in directions perpendicular to the front-rear direction extends along the axial direction. The axial length L2 of the rectifier member 50 is 49.4 mm. The axial distance L3 between the mounting surface 32c of the contact roller motor 32 and the front end of the rectifier member 50 is 11.9 mm.

[0065] As shown in Figures 4(a) and (b), the rectifier member 50 is positioned around a portion of the contact roller motor 32 when viewed from the front-rear direction. The rectifier surface 50a of the rectifier member 50, which faces the contact roller motor 32 when viewed from the front-rear direction, is a surface that extends along the axial direction.

[0066] The rectifier member 50 has a first portion 51 that covers the upper portion of the outer circumferential surface of the contact roller motor 32, and a second portion 52 that covers the left portion of the outer circumferential surface of the contact roller motor 32. A support member 53 that supports the rectifier member 50 relative to the contact roller motor 32 is attached to the first portion 51. The second portion 52 is formed in an arc shape concentric with the contact roller motor 32 when viewed from the front or rear direction.

[0067] Here, the diameter (outer diameter excluding the fins 32b) φ1 of the contact roller motor 32 is 140 mm. Including the fins 32b, the vertical length of the contact roller motor 32 is 145 mm. The inner diameter φ2 of the second portion 52 of the rectifier member 50 is 210 mm. That is, the distance between the outer circumferential surface of the contact roller motor 32 and the inner surface of the second portion 52 of the rectifier member 50 in the radial direction is 35 mm.

[0068] Since the rectifier member 50 is attached to the contact roller motor 32, when the contact roller 25 is moved by the first moving mechanism 46 and the second moving mechanism 47, the rectifier member 50 also moves together with the contact roller motor 32. In this embodiment, as shown in Figure 4(b), the rectifier member 50 moves within a range that does not overlap with the outlet 33a of the fan 33 when viewed from the front or rear direction. The rectifier member 50 may overlap with the outlet 33a of the fan 33 when viewed from the front or rear direction.

[0069] The rectifier member 50 is located inside the front cover 26. As shown in Figures 4(a) and (b), a portion of the side portion 26b of the front cover 26 functions as a rectifier portion 26b1 that rectifies the cooling air sent out from the fan 33. The rectifier portion 26b1 is located on a portion of the periphery of the contact roller motor 32 when viewed from the front-rear direction. The rectifier portion 26b1 covers the right and lower portions of the outer circumferential surface of the contact roller motor 32. The rectifier member 50 is located on the portion of the periphery of the contact roller motor 32 that is not covered by the rectifier portion 26b1 of the front cover 26 when viewed from the front-rear direction.

[0070] The cooling air sent out from the fan 33 is prevented from flowing away from the contact roller motor 32 when viewed from the front or rear direction by the rectifier member 50 and the rectifier portion 26b1 of the front cover 26. Furthermore, the cooling air sent out from the fan 33 flows towards the rear through the gap between the outer circumferential surface of the contact roller motor 32 and the rectifier member 50, and through the gap between the outer circumferential surface of the contact roller motor 32 and the rectifier portion 26b1 of the front cover 26.

[0071] (Comparative study) Comparative tests were conducted in three cases: one in which a fan is provided to send cooling air to the contact roller motor and a rectifier member is provided to rectify the cooling air sent from the fan (Example); one in which a fan is provided to send cooling air to the contact roller motor but no rectifier member is provided (Comparative Example 1); and one in which there is no fan (Comparative Example 2). In the tests, the winding speed of the yarn Y (peripheral speed of the contact roller) was set to 5300 [m / min]. The coupling used to connect the contact roller and the contact roller motor consisted of hubs attached to the rotating shaft of the contact roller and the rotor of the contact roller motor, respectively, and a spider made of an elastic material placed between the two hubs. The room temperature was 22.3°C in Example, 25.2°C in Comparative Example 1, and 17.1°C in Comparative Example 2.

[0072] Figure 7 shows the results of the comparative test. The average temperature of the contact roller motor (CR motor) is the average of the temperatures measured at multiple locations on the surface of the contact roller motor. The coupling hub temperature is the temperature measured at the hub attached to the contact roller motor side of the coupling. The temperature of the spider was measured on both the contact roller motor side (motor side) and the contact roller side (CR side). Furthermore, the temperature was also measured at the arm portion located in front of the contact roller. In all measurement results, the temperature decreased in the order of Comparative Example 2, Comparative Example 1, and Example. In other words, by providing a fan to send cooling air to the contact roller motor, the temperature of each part can be reduced. Furthermore, by arranging a rectifier, the temperature of each part can be reduced even further. In short, it was confirmed that the cooling effect is enhanced by the rectifier.

[0073] (Characteristics of the embodiment) As described above, the yarn winding machine 4 of this embodiment is a yarn winding machine 4 that winds a plurality of yarns Y onto a plurality of bobbins B to form a plurality of packages P, and comprises a bobbin holder 24 on which the plurality of bobbins B are mounted, a contact roller 25 that extends at least in the front-rear direction and applies contact pressure to the outer circumferential surface of the plurality of packages P, a first moving mechanism 46 and a second moving mechanism 47 for moving the contact roller 25, a contact roller motor 32 attached to the front end of the contact roller 25 in the front-rear direction and rotationally drives the contact roller 25, a front cover 26 that covers the contact roller motor 32 and is positioned on the opposite side of the contact roller 25 with respect to the front-rear direction and has a base 26a with an opening 26a1 that penetrates in the front-rear direction, and a fan 33 that is attached to the front cover 26 and positioned in the opening 26a1 of the front cover 26 and sends cooling air towards the contact roller motor 32 in the front-rear direction. The first moving mechanism 46 moves the contact roller 25 so that the position of the contact roller 25 in a virtual plane perpendicular to the front-rear direction changes. The second moving mechanism 47 moves the contact roller 25 so that the axial direction of the contact roller 25 changes. The contact roller motor 32 moves inside the front cover 26 as the contact roller 25 is moved by the first moving mechanism 46 and the second moving mechanism 47. The fan 33 is positioned such that at least a portion of the outlet 33a overlaps with the contact roller motor 32, which is located within the range of movement of the contact roller motor 32 when the contact roller 25 is moved by the first moving mechanism 46 and the second moving mechanism 47, when viewed from the front-rear direction.

[0074] According to the above configuration, since the fan 33 is attached to the front cover 26, there is no need to form a large opening in the front cover 26, as would be the case if the fan 33 were attached to the contact roller motor 32. Therefore, the front cover 26 can protect the contact roller motor 32. In addition, the fan 33's outlet 33a is positioned such that, when viewed from the front and rear directions, at least a portion of it overlaps with the contact roller motor 32, which is within the range of movement of the contact roller motor 32 when the contact roller 25 is moved by the first moving mechanism 46 and the second moving mechanism 47. Therefore, even when the contact roller motor 32 moves relative to the fixed fan 33, the cooling air from the fan 33 can be reliably directed at the contact roller motor 32, effectively cooling it.

[0075] Furthermore, in the thread winding machine 4 of this embodiment, a flow straightening member 50 is provided, which is positioned between the fan 33 and the contact roller 25 in the front-rear direction, and is located in a part of the periphery of the contact roller motor 32 when viewed from the front-rear direction, and which straightens the cooling air sent out from the fan 33. Therefore, the flow straightening member 50 can suppress the cooling air sent out from the fan 33 from flowing away from the contact roller motor 32 when viewed from the front-rear direction. Thus, the cooling air sent out from the fan 33 can be reliably sent around the contact roller motor 32, and the contact roller motor 32 can be cooled more effectively.

[0076] Furthermore, in the thread winding machine 4 of this embodiment, the flow straightening member 50 is positioned opposite a part of the contact roller motor 32 in a direction perpendicular to the front-rear direction. Therefore, the cooling air sent from the fan 33 flows through the gap between the contact roller motor 32 and the flow straightening member 50 due to the flow straightening member 50. Thus, the contact roller motor 32 can be cooled more effectively.

[0077] Furthermore, in the thread winding machine 4 of this embodiment, the flow straightening member 50 is positioned to straddle the front end of the contact roller motor 32 in the front-rear direction. Therefore, the portion of the flow straightening member 50 that is in front of the contact roller motor 32 in the front-rear direction can direct the cooling air sent from the fan 33 into the gap between the contact roller motor 32 and the flow straightening member 50. Thus, the contact roller motor 32 can be cooled even more effectively.

[0078] In addition, in the thread winding machine 4 of this embodiment, the flow straightening member 50 is attached to the contact roller motor 32. Therefore, even when the contact roller motor 32 moves, the positional relationship between the flow straightening member 50 and the contact roller motor 32 does not change. Thus, interference between the flow straightening member 50 and the contact roller motor 32 can be reliably prevented.

[0079] Furthermore, in the thread winding machine 4 of this embodiment, the second portion 52 of the rectifier member 50 is formed in an arc shape concentric with the contact roller motor 32 when viewed from the front-rear direction. Therefore, the contact roller motor 32 can be cooled as uniformly as possible.

[0080] Furthermore, in the thread winding machine 4 of this embodiment, the flow straightening member 50 is positioned so as not to face the fan 33 in a direction perpendicular to the front-rear direction. Therefore, even when the contact roller motor 32 moves, interference between the flow straightening member 50 and the fan 33 can be avoided.

[0081] In addition, in the thread winding machine 4 of this embodiment, the rectifier member 50 rectifies the cooling air sent from the fan 33 so that it flows along the axial direction of the contact roller 25. Therefore, the contact roller motor 32 can be cooled more effectively by the cooling air flowing along the axial direction of the contact roller 25.

[0082] Furthermore, in the thread winding machine 4 of this embodiment, the contact roller motor 32 has protruding fins 32b that extend along the axial direction of the contact roller 25. Therefore, the cooling air sent from the fan 33 by the rectifier member 50 flows along the direction in which the fins 32b extend. Thus, the cooling effect of the fins 32b can be fully realized.

[0083] Furthermore, in the thread winding machine 4 of this embodiment, the front cover 26 is formed in a box shape with an opening at the rear, and the rectifier member 50 is arranged inside the front cover 26. The front cover 26 is positioned in a part of the periphery of the contact roller motor 32 when viewed from the front and rear directions, and has a rectifier portion 26b1 that rectifies the cooling air sent out from the fan 33, while the rectifier member 50 is positioned in the part of the periphery of the contact roller motor 32 where the rectifier portion 26b1 is not located, when viewed from the front and rear directions. Therefore, by positioning the rectifier member 50 in the part of the periphery of the contact roller motor 32 where the rectifier portion 26b1 of the front cover 26 is not located, the cooling air sent out from the fan 33 can be rectified over a wider area around the contact roller motor 32. Thus, the contact roller motor 32 can be cooled more effectively.

[0084] In addition, the yarn winding machine 4 of this embodiment is equipped with a turret 23 that can rotate and cantileverably support the bobbin holder 24, a turret motor 23a that rotates the turret 23, and a control unit 5. The control unit 5 controls the first moving mechanism 46 to move the contact roller 25 in accordance with the winding thickness of the package P during the initial winding period from the start of winding the yarn Y onto the bobbin B until the winding diameter of the package P reaches a predetermined size. After the winding diameter of the package P reaches a predetermined size, during the main winding period until the package P is fully wound, the control unit 5 controls the turret motor 23a to rotate the turret 23 in accordance with the winding thickness of the package P and move the package P. The fan 33 is positioned so that the center of the outlet 33a coincides with the center of the contact roller motor 32 during the main winding period when viewed from the front and rear directions. Therefore, the cooling air from the fan 33 can be more reliably directed at the contact roller motor 32 during the main winding period, effectively cooling the contact roller motor 32.

[0085] Although embodiments of the present invention have been described above with reference to the drawings, it should be understood that the specific configurations are not limited to these embodiments. The scope of the present invention is indicated by the claims rather than the above description of embodiments, and all modifications within the meaning and scope equivalent to the claims are included.

[0086] In the above-described embodiment, a case was explained in which a first moving mechanism 46 and a second moving mechanism 47 are provided as a moving mechanism for moving the contact roller 25, but the invention is not limited to this. It is sufficient to provide a mechanism for moving the contact roller 25 such that at least one of the positions of the contact roller 25 in a virtual plane perpendicular to the axial direction and the front-rear direction of the contact roller 25 changes.

[0087] Furthermore, although the above embodiment described a case in which the contact roller motor 32 is attached to the front end of the contact roller 25, the contact roller motor 32 may also be attached to the rear end of the contact roller 25.

[0088] Furthermore, although the above-described embodiment described a case where the rectifier member 50 is arranged around at least a portion of the contact roller motor 32 when viewed from the front-rear direction, it is not limited to this. The rectifier member 50 may be arranged around the entire circumference of the contact roller motor 32. The rectifier member 50 may also be omitted.

[0089] In addition, although the above-described embodiment described a case in which the rectifier member 50 is positioned opposite a part of the contact roller motor 32 in a direction perpendicular to the front-rear direction, it is not limited to this. The rectifier member 50 may be positioned opposite the entire contact roller motor 32 in a direction perpendicular to the front-rear direction. The rectifier member 50 may be positioned not opposite the contact roller motor 32 in a direction perpendicular to the front-rear direction.

[0090] Furthermore, although the above-described embodiment described a case in which the rectifier member 50 is arranged across the front end of the contact roller motor 32 in the front-rear direction, it is not limited to this. The rectifier member 50 may be arranged behind the front end of the contact roller motor 32. The rectifier member 50 may be arranged in front of the front end of the contact roller motor 32.

[0091] Furthermore, although the above-described embodiment described a case in which the rectifier member 50 is attached to the contact roller motor 32, it is not limited to this. The rectifier member 50 may be attached to, for example, the front cover 26 and fixed in place. In this case, even when the contact roller motor 32 moves in conjunction with the movement of the contact roller 25, the rectifier member 50 is always positioned in a part of the periphery of the contact roller motor 32 when viewed from the front-rear direction. For example, as shown in Figure 8, the rectifier member 50 is positioned outside the range of movement of the contact roller motor 32 (area enclosed by dashed lines) and covers at least a part of the range of movement. Also, the rectifier surface 50a of a fixedly positioned rectifier member 50 is, for example, a surface that extends along the front-rear direction.

[0092] Furthermore, although the above-described embodiment described a case in which the second portion 52 of the rectifier member 50 is formed in an arc shape concentric with the contact roller motor 32 when viewed from the front-rear direction, the embodiment is not limited to this. The entire rectifier member 50 may be circular in shape concentric with the contact roller motor 32. The rectifier member 50 does not have to have an arc-shaped portion concentric with the contact roller motor 32.

[0093] Furthermore, although the above-described embodiment described a case in which the rectifier member 50 is positioned so as not to face the fan 33 in a direction perpendicular to the front-rear direction, the embodiment is not limited to this. The rectifier member 50 may be positioned so as to face the fan 33 in a direction perpendicular to the front-rear direction.

[0094] In addition, the above-described embodiment described a case in which the rectifier member 50 rectifies the cooling air sent from the fan 33 so that it flows along the axial direction of the contact roller 25, but it is not limited to this. The rectifier member 50 only needs to be able to suppress the cooling air sent from the fan 33 from flowing away from the contact roller motor 32 when viewed from the front and rear directions.

[0095] Furthermore, although the above-described embodiment described a case in which a protruding fin 32b extending along the axial direction of the contact roller 25 is formed on the contact roller motor 32, it is not limited to this case. The direction in which the fin 32b extends does not have to be along the axial direction of the contact roller 25. The fin 32b may not be formed at all.

[0096] In addition, although the above-described embodiment described a case in which the side portion 26b of the front cover 26 extends from the entire circumference of the base portion 26a, it is not limited to this. The front cover 26 may be box-shaped with a part of the side portion 26b missing. Also, the side portion 26b may extend from a part other than the edge of the base portion 26a. Furthermore, the side portion 26b does not have to have a flow-rectifying portion 26b1.

[0097] Furthermore, in the above-described embodiment, the fan 33 was described as being positioned such that the center of the outlet 33a coincides with the center of the contact roller motor 32 during the main winding phase when viewed from the front-rear direction, but it is not limited to this. The center of the outlet 33a of the fan 33 may be offset from the center of the contact roller motor 32 during the main winding phase when viewed from the front-rear direction. [Explanation of symbols]

[0098] 4. Thread winding machine 5. Control Unit 23 Turrets 23a Turret motor (turret driving means) 24 Bobbin Holder 25 Contact rollers 26 Front cover (cover component) 26a base 26b Side 26a1 opening 26b1 Rectifier part 32 Contact roller motor (motor) 32b fin 33 Fans 33a Air outlet 46 1st moving mechanism (moving mechanism) 47 Second moving mechanism (moving mechanism) 50 Rectifying member B Bobbin P Package Y thread

Claims

1. A yarn winding machine that winds multiple threads onto multiple bobbins to form multiple packages, A bobbin holder on which the aforementioned multiple bobbins are mounted, A contact roller that extends at least in a predetermined stretching direction and applies contact pressure to the outer circumferential surfaces of the plurality of packages, A moving mechanism for moving the contact roller, A motor is attached to one end of the contact roller in the aforementioned extension direction and rotates the contact roller, The motor is positioned on the opposite side of the contact roller with respect to the extension direction and has a portion having an opening formed through it in the extension direction, and the cover member covers the motor, The cover member is attached to the cover member in a state where it is positioned in the opening of the cover member, and includes a fan that sends cooling air toward the motor in the extending direction, The moving mechanism moves the contact roller such that at least one of the positions of the contact roller in a virtual plane perpendicular to the axial direction of the contact roller and the stretching direction of the contact roller changes. The motor moves inside the cover member as the contact roller is moved by the moving mechanism. The fan is positioned such that at least a portion of the outlet overlaps with the motor, which is located within the range of movement of the motor when the contact roller is moved by the moving mechanism, as viewed from the extension direction.

2. The yarn winding machine according to claim 1, further comprising a flow straightening member positioned between the fan and the contact roller with respect to the stretching direction, and positioned around the motor as viewed from the stretching direction, for straightening the cooling air sent out from the fan.

3. The yarn winding machine according to claim 2, wherein the rectifying member is positioned opposite at least a portion of the motor in a direction perpendicular to the stretching direction.

4. The thread winding machine according to claim 3, wherein the rectifying member is arranged across one end of the motor in the extending direction.

5. The rectifier member is attached to the motor, as described in any one of claims 2 to 4.

6. The yarn winding machine according to claim 5, wherein at least a portion of the rectifying member is formed in an arc shape concentric with the motor when viewed from the extension direction.

7. The thread winding machine according to claim 5 or 6, wherein the rectifying member is positioned so as not to face the fan in a direction perpendicular to the stretching direction.

8. The winding machine according to any one of claims 5 to 7, wherein the straightening member straightens the cooling air sent out from the fan so that it flows along the axial direction of the contact roller.

9. The thread winding machine according to claim 8, wherein the motor has protruding fins that extend along the axial direction.

10. The cover member is formed in a box shape with the other side in the extension direction open, The rectifier member is positioned inside the cover member, The cover member is positioned in a part of the periphery of the motor when viewed from the extension direction, and has a flow straightening portion that straightens the cooling air sent out from the fan. The winding machine according to any one of claims 2 to 9, wherein the rectifying member is arranged in a portion of the area around the motor where the rectifying portion is not located, as viewed from the extending direction.

11. The bobbin holder is rotatably cantilevered and supported by a turret, A turret driving means for rotating the turret, It includes a control unit, The control unit, During the initial winding phase, from the start of winding the yarn onto the bobbin until the winding diameter of the package reaches a predetermined size, the moving mechanism is controlled to move the contact roller in accordance with the expansion of the winding of the package. After the winding diameter of the package reaches a predetermined size, during the main winding period until the package is fully wound, the turret driving means is controlled to rotate the turret in accordance with the winding thickness of the package and move the package. The thread winding machine according to any one of claims 1 to 10, wherein the fan is positioned such that the center of the outlet coincides with the center of the motor of the main winding period when viewed from the extension direction.

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