thread winding machine

Abstract

To provide a constitution capable of securing the positional freedom of a bobbin holder during yarn hanging work, in a yarn winder in which a thread guide of yarn fed out of a yarn feed roller is inclined relative to the vertical direction.SOLUTION: A yarn winder 1 has a contact roller 31 and a traverse device 21. The contact roller 31 rotates in contact with a package 92. The traverse device 21 has a traverse guide, an upstream guide rail and a downstream guide rail. The traverse guide traverses yarn 91 in contact with the yarn 91 leading from a yarn feeding roller 100 to the contact roller 31. The upstream guide rail and the downstream guide rail allow the movement of the traverse guide in the winding width direction, and restrict the movement of the traverse guide toward the upstream side or the downstream side of the yarn route. A downstream opposing face of the downstream guide rail, which faces the yarn route, includes a retreat surface that separates from the yarn route when coming nearer to the downstream of the yarn route when viewed in the axial direction of the package 92.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention mainly relates to a winding machine that winds yarn onto a bobbin to manufacture a package.

Background Art

[0002] In Patent Document 1, two winding devices are arranged for one godet roller (yarn feed roller). Therefore, the yarn path from the godet roller to the winding device is inclined with respect to the vertical direction. Patent Document 1 discloses a layout in which the traverse yarn guiding device is inclined corresponding to the inclination of the yarn path.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the winding device of Patent Document 1, since the traverse yarn guiding device is inclined, the traverse yarn guiding device protrudes greatly in the horizontal direction as it approaches downward in the vertical direction. Therefore, in the layout of Patent Document 1, due to the inclination of the traverse yarn guiding device, when threading the yarn onto the bobbin holder of the winding device during the threading operation, depending on the position of the bobbin holder onto which the yarn is threaded, the yarn may contact the traverse yarn guiding device, resulting in yarn breakage. Thus, the freedom of the position of the bobbin holder during the threading operation is reduced.

[0005] The present invention has been made in view of the above circumstances, and its main object is to provide a configuration that can ensure the freedom of the position of the bobbin holder during the threading operation in a winding machine in which the yarn path of the yarn fed out from the yarn feed roller is inclined with respect to the vertical direction. Means for Solving the Problems and Effects

[0006] The problems that this invention aims to solve are as described above, and next, the means for solving these problems and their effects will be explained.

[0007] In view of the present invention, a yarn winding machine having the following configuration is provided. That is, the yarn winding machine winds yarn fed from a yarn feed roller onto a bobbin to manufacture a package. The yarn winding machine comprises a bobbin holder, a contact roller, and a traverse device. The bobbin holder holds the bobbin. The contact roller rotates in contact with the package. The traverse device is opposite the contact roller and is positioned to sandwich the yarn from the yarn feed roller to the contact roller between itself and the contact roller. The traverse device comprises a traverse guide, an upstream guide rail, and a downstream guide rail. The traverse guide contacts the yarn from the yarn feed roller to the contact roller and traverses the yarn. The upstream guide rail allows the traverse guide to move in the winding width direction and restricts its movement toward the upstream side of the yarn path. The downstream guide rail allows the traverse guide to move in the winding width direction and restricts its movement toward the downstream side of the yarn path. During yarn winding, the yarn path from the yarn feed roller to the contact roller is As you approach the downstream side, the distance to the contact roller in the horizontal direction decreases. It is inclined with respect to the vertical. When viewed in the axial direction of the package, the threading position for attaching the thread to the bobbin is on the traverse guide side with respect to the contact roller. Of the downstream guide rails, the one facing the string path The side surface The downstream opposing surface includes a receding surface that moves away from the thread path as it approaches the downstream of the thread path when viewed in the axial direction of the package.

[0008] By forming a retractable surface on the downstream guide rail, the position of the bobbin holder on which the thread is attached during threading can be moved closer to the traverse device side from the contact roller, thus keeping the thread from the thread feed roller to the bobbin holder away from the contact roller. This reduces the likelihood of the thread coming into contact with the contact roller and breaking during threading. This ensures greater flexibility in the position of the bobbin holder during threading. When the string attachment point is on the traverse guide side, the string path becomes closer to the downstream guide rail during string attachment. Therefore, a configuration with a retraction surface on the downstream guide rail can be effectively utilized.

[0009] In the aforementioned thread winding machine, it is preferable that the upstream opposing surface is provided so as to follow the thread path when viewed in the axial direction of the package.

[0010] By forming a receding surface only on the downstream guide rail, which is highly likely to come into contact with the thread, the shape of the upstream guide rail can be simplified.

[0011] In the aforementioned thread winding machine, the following configuration is preferable: that is, it comprises a plurality of winding sections, each including the bobbin holder, the contact roller, and the traverse device. The winding sections are arranged vertically or horizontally.

[0012] When winding units are arranged side by side and the thread is supplied from a single thread feed roller, the thread path from the thread feed roller to the contact roller must be inclined. Therefore, a configuration with a retractable surface on the downstream guide rail can be effectively utilized.

[0013] In the aforementioned yarn winding machine, the following configuration is preferable. That is, the winding units are arranged vertically. The angle of inclination of the yarn path from the yarn feed roller to the upper contact roller with respect to the vertical is greater than the angle of inclination of the yarn path from the yarn feed roller to the lower contact roller with respect to the vertical. At least the downstream opposing surface of the downstream guide rail of the upper winding unit includes the retractable surface.

[0014] This allows for the provision of a retractable surface on the downstream guide rail of the winding section on the side where the thread path is inclined.

[0015] In the aforementioned yarn winding machine, it is preferable to provide a lifting device that raises and lowers the traverse guide relative to the contact roller when the direction in which the yarn feed roller is positioned relative to the yarn winding machine is defined as the height direction.

[0016] By changing the relative height between the traverse guide and the contact roller, the inclination angle of the yarn path with respect to the vertical direction changes. Therefore, the configuration in which the retreat surface is provided on the downstream guide rail can be effectively utilized.

Brief Description of the Drawings

[0019] [Figure 1] Front view of a yarn winder according to an embodiment of the present invention. [Figure 2] Block diagram of a yarn winder. [Figure 3] Front cross-sectional view of a traverse device and its vicinity. [Figure 4] Explanatory diagram of the traverse width being shortened due to the difference in free lengths. [Figure 5] Front view of the upper winding part during yarn hanging.

Embodiments for Carrying Out the Invention

[0020] Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a yarn winder 1 according to an embodiment of the present invention. FIG. 2 is a block diagram of the yarn winder 1. In the following description, the upstream or downstream in the running direction of the yarn may be simply referred to as upstream or downstream.

[0021] A spinning machine (not shown) is arranged upstream of the yarn winder 1 shown in FIG. 1. The yarn 91 produced by the spinning machine is supplied to the yarn winder 1 via the yarn feed roller 100. The yarn winder 1 winds the yarn 91 around the bobbin 90 to form a yarn layer on the bobbin 90 and manufactures a package 92. The yarn 91 is, for example, an elastic yarn such as spandex. However, the type of the yarn 91 is not limited to this, and it may be a synthetic fiber yarn such as nylon or polyester, for example.

[0022] As shown in FIG. 1, the winder 1 includes two winding units 10 arranged vertically one above the other. Threads 91 are individually supplied to each winding unit 10, and packages 92 are individually manufactured by each winding unit 10. A plurality of threads 91 arranged in the axial direction of the package 92 are supplied to the winding unit 10. The winding unit 10 winds up the plurality of threads 91 respectively to manufacture a plurality of packages 92.

[0023] Since the two winding units 10 each have the same devices, the upper and lower winding units 10 will be described together below. As shown in FIG. 1, the winding unit 10 includes a frame 11, a first housing 20, a second housing 30, and a turret plate 40.

[0024] The frame 11 is a member that holds each part included in the winding unit 10. A traversing device 21 is attached to the first housing 20. The traversing device 21 traverses the thread 91 sent to the downstream side by reciprocating in the winding width direction (axial direction of the package 92) with the traversing guide 23 described later engaged with the thread 91. As shown in FIG. 2, the traversing device 21 includes a traversing cam 22 and a traversing guide 23.

[0025] The traversing cam 22 is a roller-shaped member arranged parallel to the bobbin 90. A spiral cam groove is formed on the outer peripheral surface of the traversing cam 22. The traversing cam 22 is rotationally driven by a traversing motor 51.

[0026] The traversing motor 51 is controlled by a control device 50. The control device 50 includes a CPU, a ROM, a RAM, etc. The CPU reads out the program stored in the ROM and executes it to perform various controls related to the winding unit 10. ]>

[0027] The traverse guide 23 is the part that engages with the thread 91 from the thread feed roller 100 to the contact roller 31, which will be described later. The tip of the traverse guide 23 has, for example, a roughly U-shaped guide portion, and engages with the thread 91 by clamping it in the winding width direction. The base end of the traverse guide 23 is located in the cam groove of the traverse cam 22. With this configuration, the traverse guide 23 can be reciprocated in the winding width direction by rotationally driving the traverse cam 22.

[0028] A contact roller 31 is rotatably mounted in the second housing 30. The contact roller 31 rotates while contacting the yarn layer of the package 92 with a predetermined pressure during the winding of the yarn 91, thereby shaping the yarn layer of the package 92. The traverse device 21 and the contact roller 31 are positioned opposite each other, with the yarn 91 running from the yarn feed roller 100 to the contact roller 31.

[0029] The contact roller 31 is attached to the second housing 30 via an arm (not shown). By the oscillation of this arm, the contact roller 31 is able to move relative to the second housing 30 in the vertical direction. In this embodiment, the contact roller 31 moves downward by its own weight, but it may be driven up and down by an actuator such as a cylinder.

[0030] Furthermore, as shown in Figure 2, the winding unit 10 is equipped with a position sensor 52 that detects the swaying of the arm. The position sensor 52 is, for example, a contact sensor that detects whether the contact roller 31 has come closer to the second housing 30 than a predetermined distance. The detection result of the contact roller 31 is output to the control device 50.

[0031] The second housing 30 is provided with an operation panel 32. The operation panel 32 is a device operated by an operator. By operating the operation panel 32, the operator gives instructions to the winding unit 10. Examples of instructions given by the operator include starting winding, stopping winding, and changing winding conditions.

[0032] The turret plate 40 is a disc-shaped component. The turret plate 40 is rotatably mounted on the frame 11. The axis of rotation of the turret plate 40 is at the center of the turret plate 40. The turret plate 40 is rotationally driven by the turret motor 53 shown in Figure 2. The turret motor 53 is controlled by the control device 50.

[0033] On the turret plate 40, bobbin holders 41 are provided at two locations opposite each other, with the center in between. Multiple bobbins 90 can be mounted on 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. Each bobbin holder 41 is cantilevered to the turret plate 40.

[0034] The bobbin holder 41 is rotatable relative to the turret plate 40, with its axial position as the center of rotation. The two bobbin holders 41 are individually driven to rotate by the bobbin holder motors 54 shown in Figure 2. The bobbin holder motors 54 are controlled by the control device 50.

[0035] With two bobbin holders 41 positioned vertically, the thread 91 is wound onto the higher bobbin holder 41. Specifically, after the thread is threaded onto the bobbin 90 of one bobbin holder 41, the other bobbin holder 41 comes into contact with the contact roller 31, and as the other bobbin holder 41 rotates in this state, the thread 91 is wound onto the bobbin 90 of the other bobbin holder 41, thereby manufacturing the package 92. A tip support member 45 is provided to support the free end of the bobbin holder 41 that is in contact with the contact roller 31.

[0036] Furthermore, when a predetermined amount of thread 91 has been wound and the package 92 is full, the turret plate 40 rotates, switching the positions of the two bobbin holders 41. Subsequently, the full package 92 is collected, and the thread 91 is wound onto the bobbin 90 attached to one of the bobbin holders 41.

[0037] As shown in Figure 2, the winding unit 10 is equipped with a lifting device 60. The lifting device 60 moves the first housing 20 and the second housing 30 up and down as a single unit. Specifically, the first housing 20 and the second housing 30 are attached to a lifting member (not shown). A ball nut 61 is attached to this lifting member. A threaded rod 62 is attached to the frame 11. By rotating the threaded rod 62 using a lifting motor 63, the first housing 20 and the second housing 30 can be moved up and down. The lifting motor 63 is controlled by a control device 50. Note that the lifting device 60 may be implemented using a cylinder instead of a ball screw.

[0038] The control device 50 controls the lifting device 60 as follows in response to the winding of the package 92. As described above, the contact roller 31 is movable up and down relative to the second housing 30. Therefore, as the yarn 91 is wound and the package 92 winds up, the contact roller 31 moves upward relative to the second housing 30. Based on the detection result from the position sensor 52, the control device 50 determines whether the contact roller 31 has come closer to the second housing 30 than a predetermined distance. If the control device 50 determines that the contact roller 31 has come closer to the second housing 30 than a predetermined distance, it controls the lifting device 60 to raise the first housing 20 and the second housing 30. By repeating the above process, the first housing 20 and the second housing 30 can be raised in response to the winding of the package 92.

[0039] Next, we will describe the thread path of the thread 91 supplied to the winding section 10. In the following description, the winding section 10 located on the upper side will be referred to as the "upper winding section 10," and the winding section 10 located on the lower side will be referred to as the "lower winding section 10."

[0040] In this embodiment, the upper and lower winding sections 10 are positioned with a horizontal displacement so that the yarn 91 supplied to the lower winding section 10 does not interfere with the upper winding section 10. The direction of displacement between the upper and lower winding sections 10 coincides with the direction perpendicular to the axial direction of the package 92 in the horizontal plane.

[0041] Furthermore, as described above, in this embodiment, the yarn 91 is supplied from a single yarn feed roller 100 to the upper winding section 10 and the lower winding section 10. Therefore, it is not possible to make the yarn paths of the yarn 91 supplied to both winding sections 10 parallel to the vertical. Specifically, the yarn path of the yarn 91 supplied to the lower winding section 10 is parallel to the vertical, while the yarn path of the yarn 91 supplied to the upper winding section 10 is inclined with respect to the vertical. In other words, the inclination angle of the yarn path of the yarn 91 supplied to the upper winding section 10 with respect to the vertical is greater than the inclination angle of the yarn path of the yarn 91 supplied to the lower winding section 10 with respect to the vertical.

[0042] Furthermore, in this embodiment, the term "parallel" includes not only strictly parallel lines but also substantially parallel lines (where the angles are slightly different). The same applies to "perpendicular." In addition, the thread path may change depending on the progress of winding or the position of the traverse device 21, but unless otherwise specified, the thread path indicates the position of the thread path at the start of winding.

[0043] The upper winding section 10 requires a layout that accommodates the inclined thread path. For example, if all the devices related to winding the thread 91 are inclined, the size of the upper winding section 10 becomes large, which is undesirable. Therefore, in this embodiment, only the first housing 20 of the upper winding section 10 is inclined to follow the thread path. As a result, the traverse device 21 is positioned along the thread path, allowing the thread 91 to be properly traversed using the traverse guide 23. Furthermore, compared to a configuration in which all the winding devices are inclined, the thread winding machine 1 can be made more compact.

[0044] Next, the effects of tilting the traverse device 21 will be explained with reference to Figure 3. Figure 3 shows a front cross-sectional view of the traverse device 21 and its vicinity.

[0045] As shown in Figure 3, the traverse device 21 includes an upstream guide rail 24 and a downstream guide rail 25. The upstream guide rail 24 and the downstream guide rail 25 contact the traverse guide 23 and guide its movement. The upstream guide rail 24 and the downstream guide rail 25 allow the traverse guide 23 to move in the winding width direction (traverse direction). Specifically, the upstream guide rail 24 and the downstream guide rail 25 form a sliding space. A portion of the traverse guide 23 is located in this sliding space. Therefore, the traverse guide 23 is slidable in the winding width direction.

[0046] Furthermore, the upstream guide rail 24 contacts and interferes with the upper surface of the traverse guide 23, thereby restricting the movement of the traverse guide 23 toward the upstream side of the line path. The downstream guide rail 25 contacts and interferes with the lower surface of the traverse guide 23, thereby restricting the movement of the traverse guide 23 toward the downstream side of the line path. With this configuration, the traverse guide 23 can move only in the winding width direction without moving in the direction along the line path.

[0047] Here, the surface of the upstream guide rail 24 facing the thread path is referred to as the upstream opposing surface 24a. The surface of the downstream guide rail 25 facing the thread path is referred to as the downstream opposing surface 25a. In this embodiment, since the traverse device 21 is tilted in accordance with the slope of the thread path, the upstream opposing surface 24a is formed to follow the thread path. More specifically, the upstream opposing surface 24a has a two-tiered shape and includes two surfaces at different positions, but both surfaces are formed to follow the thread path.

[0048] In contrast, the downstream opposing surface 25a of this embodiment includes a receding surface 25b that moves away from the thread path as it approaches the downstream side of the thread path. More specifically, the downstream opposing surface 25a has a two-tiered shape, with the surface closer to the thread path being the receding surface 25b.

[0049] In this embodiment, the retractable surface 25b is an inclined surface (plane), but it may also include a curve. In this embodiment, the retractable surface 25b is aligned with the vertical direction. However, depending on the thread path of the thread winding machine 1, the retractable surface 25b may be on the thread path side with respect to the vertical direction, or on the traverse cam 22 side. There is little need to provide a retractable surface on the upstream opposing surface 24a, but considering the symmetry of the parts, a surface symmetrical to the retractable surface 25b (a surface that retracts from the thread path as it approaches the upstream side of the thread path) may be provided on the upstream opposing surface 24a. In this embodiment, one of the two downstream opposing surfaces 25a is the retractable surface 25b, but the entire downstream opposing surface 25a may also be the retractable surface 25b.

[0050] Furthermore, the winding unit 10 of this embodiment has the function of shaping the package 92 by controlling the height of the traverse guide 23 relative to the contact roller 31 to be temporarily changed. The height of the traverse guide 23 relative to the contact roller 31 can be changed, for example, by controlling the lifting device 60 described above. When the first housing 20 and the second housing 30 are raised by the lifting device 60, the height of the traverse guide 23 increases, while the height of the contact roller 31 does not change due to its own weight.

[0051] As shown in Figure 4, when the height of the traverse guide 23 relative to the contact roller 31 is increased, the free length of the yarn 91 increases (from FL1 to FL2 in Figure 4). This increases the traverse lag (from D1 to D2 in Figure 4) and shortens the traverse width. Therefore, by temporarily increasing the height of the traverse guide 23 relative to the contact roller 31, it is possible to suppress the thickening of the yarn layer at the end of the package 92 in the winding width direction (selvage height).

[0052] Furthermore, by changing the height of the traverse guide 23 relative to the contact roller 31, the thread path changes, and if a retractable surface 25b is not provided, there is a risk that the thread 91 and the downstream guide rail 25 may come into contact. In this respect, since the downstream guide rail 25 of this embodiment is provided with a retractable surface 25b, contact between the thread 91 and the downstream guide rail 25 can be suppressed during this control.

[0053] Next, with reference to Figure 5, the position of the bobbin 90 during threading will be explained. Threading is the process of attaching (securing) the thread 91 to the bobbin 90 of one of the bobbin holders 41 before winding by the thread winding machine 1. In this embodiment, threading is performed by the operator using a suction gun or the like to capture the thread 91 and wind it around the bobbin 90 multiple times. Alternatively, the thread winding machine 1 may perform the threading instead of the operator.

[0054] The operator inputs the command to thread the bobbin, for example, by operating the control panel 32. Upon receiving the operator's input, the control device 50 controls the turret motor 53 to rotate the turret plate 40. This causes the bobbin holder 41 to reach the threading position. As shown in Figure 5, the threading position of the bobbin holder 41 in this embodiment is on the traverse guide side with respect to the contact roller 31. After that, the operator threads the bobbin.

[0055] Here, if the threading position of the bobbin holder 41 is on the traverse guide side with respect to the contact roller 31, the thread path will be closer to the traverse guide side. As a result, the thread 91 will be close to the downstream guide rail 25. Therefore, with the conventional shape of the downstream guide rail 25, there is a possibility that the thread 91 will come into contact with the downstream guide rail 25. In this respect, since the downstream guide rail 25 of this embodiment has a retractable surface 25b formed therein, the thread 91 is less likely to come into contact with the downstream guide rail 25. On the other hand, in order to prevent the thread 91 from coming into contact with the downstream guide rail 25 with the conventional shape of the downstream guide rail 25, it is necessary to position the bobbin holder 41 in a threading position such that the thread path is closer to the contact roller 31 side. However, if such a threading position of the bobbin holder 41 is selected, the thread 91 may come into contact with the contact roller 31, which may lead to errors in threading. Also, if a tip support member 45 is provided as in this embodiment, threading becomes difficult. In this way, by forming a retractable surface 25b on the downstream guide rail 25, it becomes possible to select a threading position for the bobbin holder 41 that allows for easy threading without causing errors during the threading process.

[0056] As described above, the yarn winding machine 1 of this embodiment includes a bobbin holder 41, a contact roller 31, and a traverse device 21. The bobbin holder 41 holds the bobbin 90. The contact roller 31 rotates in contact with the package 92. The traverse device 21 is opposite the contact roller 31 and is positioned to sandwich the yarn 91 from the yarn feed roller 100 to the contact roller 31 between the traverse device 21 and the contact roller 31. The traverse device 21 includes a traverse guide 23, an upstream guide rail 24, and a downstream guide rail 25. The traverse guide 23 contacts the yarn 91 from the yarn feed roller 100 to the contact roller 31 and traverses the yarn 91. The upstream guide rail 24 allows the traverse guide 23 to move in the winding width direction and restricts the traverse guide 23 to move toward the upstream side of the yarn path. The downstream guide rail 25 allows movement of the traverse guide 23 in the winding width direction and restricts the movement of the traverse guide 23 toward the downstream side of the thread path. During winding of the thread 91, the thread path from the thread feed roller 100 to the contact roller 31 is inclined with respect to the vertical. The downstream facing surface 25a of the downstream guide rail 25, which faces the thread path, includes a receding surface 25b that moves away from the thread path as it approaches the downstream side of the thread path when viewed in the axial direction of the package 92.

[0057] By forming a retractable surface 25b on the downstream guide rail 25, the position of the bobbin holder 41 on which the thread 91 is placed during threading can be set closer to the traverse device 21 side from the contact roller 31, thus keeping the thread 91 from the thread feed roller 100 to the bobbin holder 41 away from the contact roller 31. This reduces the likelihood of the thread 91 coming into contact with the contact roller 31 and breaking during threading. This ensures greater flexibility in the position of the bobbin holder 41 during threading.

[0058] In the thread winding machine 1 of this embodiment, when viewed in the axial direction of the package 92, the upstream opposing surface 24a is provided so as to follow the thread path.

[0059] By forming a retractable surface 25b only on the downstream guide rail 25, which is highly likely to come into contact with the thread 91, the shape of the upstream guide rail 24 can be simplified.

[0060] The thread winding machine 1 of this embodiment includes a plurality of winding units 10, each containing a bobbin holder 41, a contact roller 31, and a traverse device 21. The winding units 10 are arranged vertically or horizontally.

[0061] When the winding units 10 are arranged side by side and the yarn 91 is supplied from a single yarn feed roller 100, the yarn path from the yarn feed roller 100 to the contact roller 31 must be inclined. Therefore, the configuration in which the downstream guide rail 25 is provided with a retractable surface 25b can be effectively utilized.

[0062] In the yarn winding machine 1 of this embodiment, the winding units 10 are arranged side by side vertically. The angle of inclination of the yarn path from the yarn feed roller 100 to the upper contact roller 31 with respect to the vertical is greater than the angle of inclination of the yarn path from the yarn feed roller 100 to the lower contact roller 31 with respect to the vertical. At least the downstream opposing surface 25a of the downstream guide rail 25 of the upper winding unit 10 includes a retractable surface 25b.

[0063] This makes it possible to provide a retractable surface 25b on the downstream guide rail 25 of the winding section 10 on the side where the thread path is inclined.

[0064] The thread winding machine 1 of this embodiment is equipped with a lifting device 60 that raises and lowers the traverse guide 23 relative to the contact roller 31 when the direction in which the thread feed roller 100 is positioned relative to the thread winding machine 1 is defined as the height direction.

[0065] The relative height of the traverse guide 23 and the contact roller 31 changes, which alters the inclination angle of the thread path relative to the vertical. Therefore, the configuration with a retractable surface 25b on the downstream guide rail 25 can be effectively utilized.

[0066] In the thread winding machine 1 of this embodiment, when viewed in the axial direction of the package 92, the threading position for placing the thread 91 on the bobbin 90 is on the traverse guide 23 side, with reference to the contact roller 31.

[0067] When the string attachment point is on the traverse guide side, the string path becomes closer to the downstream guide rail 25 during string attachment. Therefore, the configuration with a retractable surface 25b on the downstream guide rail 25 can be effectively utilized.

[0068] Although preferred embodiments of the present invention have been described above, the above configuration can be modified as follows, for example.

[0069] In the above embodiment, the winding unit 1 has the winding units 10 arranged vertically. Alternatively, the winding units 10 may be arranged horizontally. Even in this case, the thread path of the thread 91 supplied from the thread feed roller 100 to at least one of the winding units 10 is inclined with respect to the vertical direction, so the present invention can be applied. Furthermore, the present invention is applicable to any winding unit in which the thread path of the thread 91 supplied from the thread feed roller 100 is inclined with respect to the vertical direction.

[0070] Although the traverse device 21 in the above embodiment is of the cam drum type, a different configuration is acceptable as long as it is possible to reciprocate the traverse guide 23 in the winding width direction. For example, a belt-type traverse device can be used instead of the traverse device 21.

[0071] In the traverse device 21 of the above embodiment, the upstream opposing surface 24a and the downstream opposing surface 25a of the lower winding section 10 may be formed to follow the thread path. [Explanation of symbols]

[0072] 1. Thread winding machine 10 Winding section 23 Traverse Guide 24 Upstream guide rail 24a Upstream facing surface 25 Downstream guide rail 25a Downstream facing surface 25b Evacuation surface 31 Contact roller 40 Turret Plate 41 Bobbin Holder 90 bobbins 91 thread 92 packages

Claims

1. In a yarn winding machine that manufactures packaging by winding yarn fed from a yarn feed roller onto a bobbin, A bobbin holder for holding the bobbin, A contact roller that rotates in contact with the aforementioned package, A traverse device is positioned opposite the contact roller and is arranged to sandwich the thread from the thread feed roller to the contact roller between itself and the contact roller, Equipped with, The traverse device, A traverse guide that contacts the thread from the thread feed roller to the contact roller and traverses the thread, An upstream guide rail that allows movement of the traverse guide in the winding width direction and restricts movement of the traverse guide toward the upstream side of the thread path, A downstream guide rail that allows the traverse guide to move in the winding width direction and restricts the traverse guide to move toward the downstream side of the thread path, It has, During yarn winding, the yarn path from the yarn feed roller to the contact roller is inclined with respect to the vertical direction such that the distance to the contact roller in the horizontal direction decreases as it approaches the downstream side. When viewed in the axial direction of the package, the threading position for attaching the thread to the bobbin is on the traverse guide side with respect to the contact roller. A yarn winding machine characterized in that the downstream facing surface of the downstream guide rail, which is the surface facing the yarn path, includes a retractable surface that moves away from the yarn path as it approaches the downstream of the yarn path when viewed in the axial direction of the package.

2. A thread winding machine according to claim 1, A thread winding machine characterized in that, when viewed in the axial direction of the package, the upstream facing surface of the upstream guide rail that faces the thread path is provided to be along the thread path.

3. A thread winding machine according to claim 1 or 2, The winding section comprises a bobbin holder, a contact roller, and a traverse device, A thread winding machine characterized in that the winding units are arranged vertically or horizontally.

4. A thread winding machine according to claim 3, The winding sections are arranged in a vertical line, The angle of inclination of the thread path from the thread feed roller to the contact roller located above it with respect to the vertical is greater than the angle of inclination of the thread path from the thread feed roller to the contact roller located below it with respect to the vertical. A thread winding machine characterized in that the downstream opposing surface of the downstream guide rail of the winding section, which is positioned at least on the upper side, includes the retractable surface.

5. A thread winding machine according to any one of claims 1 to 4, When the direction in which the thread feed roller is positioned relative to the thread winding machine is defined as the height direction, A thread winding machine characterized by comprising a lifting device for raising and lowering the traverse guide relative to the contact roller.

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