Yarn winding machine

Abstract

To provide a configuration with a small mounting area in a yarn winding machine that has two winding sections, one above another, which wind yarns sent out from a yarn feeding roller to manufacture packages.SOLUTION: A yarn winding machine includes a lower winding section and an upper winding section 10a. The upper winding section 10a is arranged at a position that is more deviated in a direction perpendicular to the axial direction of packages than the lower winding section in plan view. The upper winding section 10a includes a first bobbin holder, a second bobbin holder, and a turret plate 40. The first bobbin holder holds a first bobbin. The second bobbin holder holds a second bobbin. The turret plate 40 changes the positions of the first bobbin holder and the second bobbin holder. The turret plate 40 receives signals for hanging yarns on the first bobbin (yarn hanging start signal) and adjusts the position of the first bobbin holder to a position greater than 270° and smaller than 360°.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a winding machine provided with a plurality of bobbin holders.

Background Art

[0002] The spinning and winding machine of Patent Document 1 manufactures a package by winding yarn onto a bobbin. The spinning and winding machine includes two bobbin holders and a turret. A plurality of bobbins are respectively mounted on the two bobbin holders. Two bobbin holders are attached to the turret. When the turret rotates, the positions of the bobbin holders change among a winding position, a standby position, and a yarn switching position. When one bobbin holder is located at the winding position and manufacturing a package, the other bobbin holder is located at the standby position. Further, after the winding of the yarn is completed, when the turret rotates, the two bobbin holders are respectively located at the yarn switching positions. Next, the spinning and winding machine switches from a state of winding yarn onto the bobbin of one bobbin holder to a state of winding yarn onto the bobbin of the other bobbin holder by operating a slide guide.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The spinning and winding machine described in Patent Document 1 had one bobbin holder positioned 90° clockwise from the winding position, which is the position of a fully wound package at the time of yarn change, in order to load yarn onto the bobbin of one bobbin holder before starting package manufacturing. However, in a yarn winding machine with two winding sections arranged vertically, it is necessary to avoid interference between the bobbin holder of the upper winding section and the yarn going from the yarn feed roller to the lower winding section. Therefore, the lower winding section needs to be significantly offset from the upper winding section. As a result, the installation area of ​​the yarn winding machine becomes larger, leaving room for improvement.

[0005] The present invention has been made in view of the above circumstances, and its main objective is to provide a configuration with a small installation area in a yarn winding machine in which two winding units, one above the other, are arranged vertically for winding yarn fed from a yarn feed roller to manufacture a package. Means and effects for solving the problem

[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 comprises a lower winding section and an upper winding section. The lower winding section winds up yarn fed from a yarn feed roller to manufacture a package. The upper winding section is positioned higher than the lower winding section and, in a plan view, is offset from the lower winding section in a direction perpendicular to the axial direction of the package, and winds up yarn fed from the yarn feed roller to manufacture the package. The upper winding section comprises a first bobbin holder, a second bobbin holder, a bobbin holder moving mechanism, and a contact roller. The first bobbin holder holds a first bobbin. The second bobbin holder holds a second bobbin. The bobbin holder moving mechanism, to which the first bobbin holder and the second bobbin holder are attached, changes the positions of the first bobbin holder and the second bobbin holder by rotating about a rotation axis parallel to the axial direction of the package. The contact roller rotates in contact with the first bobbin, the second bobbin, or the package during the manufacturing of the package. With respect to the position in which the bobbin holder moving mechanism holds the first bobbin holder or the second bobbin holder, the position in which the first bobbin, the second bobbin, or the package contacts the contact roller to wind the yarn onto the first bobbin or the second bobbin and manufacture the package is defined as 0° or 360°, and the direction of rotation from 0° in the direction in which the upper winding section is offset relative to the lower winding section is defined as positive. In this case, the bobbin holder moving mechanism receives a signal to put yarn on the first bobbin and adjusts the position of the first bobbin holder to a position greater than 270° and less than 360°.

[0008] This makes it possible to minimize the amount of displacement of the upper winding section relative to the lower winding section, thereby reducing the installation area of ​​the thread winding machine.

[0009] In the aforementioned thread winding machine, it is preferable that the bobbin holder moving mechanism receives a signal to put thread on the first bobbin and adjusts the position of the first bobbin holder to a position greater than 290° and less than 340°.

[0010] This allows the thread to be threaded in the upper winding section at a position further away from the thread path in the lower winding section, and at a position that further avoids the possibility of the thread coming into contact with the contact roller.

[0011] In the aforementioned thread winding machine, it is preferable that the bobbin holder moving mechanism receives a signal to switch the thread so that when thread is wound on the first bobbin, the thread is wound on the second bobbin, or when thread is wound on the second bobbin, the thread is wound on the first bobbin, and adjusts the position of one of the first bobbin holder and the second bobbin holder to 180° and the position of the other to 0°.

[0012] This allows the thread switching to be performed when, after thread has been placed on the first bobbin, the thread currently wound on the first bobbin is wound onto the second bobbin, or when, after the start of package manufacturing, the thread currently wound on the first or second bobbin of a fully wound package is wound onto the second or first bobbin that is not currently wound with thread, the thread switching can be performed with the first and second bobbins positioned far from the thread path of the lower winding section.

[0013] In the aforementioned thread winding machine, it is preferable that the bobbin holder moving mechanism rotates such that the positions of the first bobbin holder and the second bobbin holder are changed only in the forward direction, from the state in which the thread is placed on the first bobbin to the state in which the thread is wound onto the second bobbin to manufacture the package.

[0014] This simplifies the control of the bobbin holder movement mechanism. Furthermore, because the first bobbin, which has a thread layer formed by the sacrificial winding, does not pass near the thread path of the lower winding section, the amount of displacement can be reduced.

[0015] In the aforementioned thread winding machine, the following configuration is preferable. That is, upon receiving a signal to put thread on the first bobbin, the position of the first bobbin holder is set to a position greater than 270° and less than 360°, and then upon receiving a signal indicating that the process of putting thread on the first bobbin is complete, the position of the first bobbin holder is set to a position greater than 0° and less than 180°.

[0016] This prevents the first bobbin from thickening when wound at a position greater than 270° but less than 360°, thus reducing interference between the first bobbin or its thread layer and the thread path of the lower winding section.

[0017] In the aforementioned yarn winding machine, it is preferable that the upper winding section is equipped with a windbreak plate to suppress the accompanying flow generated by the rotation of the package formed on the first bobbin holder or the second bobbin holder from acting on the yarn being wound in the lower winding section.

[0018] By installing a windbreak, the influence of accompanying current on the fishing line can be reduced.

[0019] In the aforementioned yarn winding machine, it is preferable that when the package formed on the second bobbin is fully wound, the bobbin holder moving mechanism switches the position of the first bobbin holder to a position less than ±45° from 0°, so that the yarn wound on the second bobbin is wound onto the first bobbin.

[0020] This prevents the fully wound package from passing through an area close to the thread path to the lower winding section. As a result, the amount of displacement of the upper winding section can be further reduced. In addition, the process of winding the thread connected to the package onto the first bobbin can be made easier. [Brief explanation of the drawing]

[0021] [Figure 1] Front view of a thread winding machine according to one embodiment of the present invention. [Figure 2] Block diagram of a thread winding machine. [Figure 3] A process diagram showing the processes from performing the threading operation and the doffing to starting the production of the package. [Figure 4] A schematic front view showing each position of the bobbin holder. [Figure 5] A schematic front view showing that the first bobbin holder moves to the threading position. [Figure 6] A schematic front view showing a stage during which the first bobbin holder moves from the threading position to the standby position. [Figure 7] A schematic front view showing the process of winding the thread around the bobbin of the second bobbin holder. [Figure 8] A schematic front view showing starting the production of the package by lowering the contact roller and the traversing device. [Figure 9] A process diagram showing the processes up to performing the threading operation and the doffing according to the modified example. [Figure 10] A schematic front view showing that the bobbin holder in the threading position moves to the doffing position. [Figure 11] A schematic front view showing a stage during which the first bobbin holder is aligned with the first switching position and the second bobbin holder is aligned with the second switching position. [Figure 12] A schematic front view showing the process of performing thread switching by aligning the first bobbin holder with the first switching position and the second bobbin holder with the second switching position. [Figure 13] A schematic front view showing the process of winding the thread around the first bobbin of the first bobbin holder after thread switching. [Figure 14] A schematic front view showing a preferable angular range of the first switching position.

Embodiments for Carrying Out the Invention

[0022] Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a winding machine 1 according to the present embodiment. FIG. 2 is a block diagram of the winding machine 1. In the following description, the upstream or downstream in the running direction of the thread may be simply referred to as upstream or downstream.

[0023] A spinning machine (not shown) is located upstream of the yarn winding machine 1 shown in Figure 1. The yarn 93 produced by the spinning machine is supplied to the yarn winding machine 1 via the yarn feed roller 100. The yarn winding machine 1 winds the yarn 93 onto bobbins 91 and 92 to form yarn layers on the bobbins 91 and 92 and manufactures a package 94. The yarn 93 is, for example, an elastic yarn such as spandex. However, the type of yarn 93 is not limited to this, and may be a synthetic yarn such as nylon or polyester.

[0024] As shown in Figure 1, the yarn winding machine 1 comprises an upper winding section 10a and a lower winding section 10b. The upper winding section 10a and the lower winding section 10b are individually supplied with yarn 93 from the same yarn feed roller 100, and packages 94 are individually manufactured in the upper winding section 10a and the lower winding section 10b. Multiple yarns 93 arranged in the axial direction of the package 94 are supplied to each winding section 10. Each winding section 10 winds up multiple yarns 93 to manufacture multiple packages 94.

[0025] The upper winding section 10a and the lower winding section 10b are basically equipped with the same device. Therefore, the upper winding section 10a will be described as a representative example below. As shown in Figure 1, the upper winding section 10a comprises a frame 11, a first housing 20, a second housing 30, and a turret plate (bobbin holder moving mechanism) 40.

[0026] The frame 11 is a member that holds the various parts of the upper winding section 10a. A traverse device 21 is attached to the first housing 20. The traverse device 21 traverses the thread 93 being sent downstream by reciprocating in the winding width direction (axial direction of the package 94) with the traverse guide 23, which will be described later, engaged with the thread 93. As shown in Figure 2, the traverse device 21 includes a traverse cam 22, a traverse guide 23, and a traverse motor 24. Figure 2 shows a block diagram of one winding section (upper winding section 10a or lower winding section 10b).

[0027] The traverse cam 22 is a roller-shaped member positioned parallel to the bobbins 91 and 92. A helical cam groove is formed on the outer circumferential surface of the traverse cam 22. The traverse cam 22 is rotationally driven by the traverse motor 24.

[0028] The traverse guide 23 is the part that engages with the thread 93. The tip of the traverse guide 23 has, for example, a roughly U-shaped guide portion that engages with the thread 93 by gripping 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. By rotating the traverse cam 22, the traverse guide 23 can be made to reciprocate in the winding width direction.

[0029] Furthermore, the traverse motor 24 is controlled by the control device 50. The control device 50 includes a CPU, ROM, RAM, etc. The CPU performs various controls related to the upper winding section 10a by reading a program stored in ROM into RAM and executing it.

[0030] A contact roller 31 is rotatably mounted in the second housing 30. When winding the yarn 93, the contact roller 31 rotates while contacting the yarn layer of the package 94 with a predetermined pressure, thereby shaping the yarn layer of the package 94.

[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 upper winding unit 10a. The instructions given by the operator include, for example, starting threading, starting winding, stopping winding, and changing winding conditions.

[0032] As shown in Figure 2, the upper winding section 10a is equipped with a lifting device 60. The lifting device 60 raises and lowers the first housing 20 and the second housing 30 together. 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 raised and lowered. The lifting motor 63 is controlled by a control device 50. The lifting device 60 may be implemented using a cylinder instead of a ball screw.

[0033] The turret plate 40 is a disc-shaped component. The turret plate 40 is rotatably mounted on the frame 11. The position of the rotation axis of the turret plate 40 coincides with the center position 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.

[0034] On the turret plate 40, a first bobbin holder 41 and a second bobbin holder 42 are provided at two locations opposite each other, with the center in between. Multiple first bobbins 91 can be mounted on the first bobbin holder 41 in an axial line. Multiple second bobbins 92 can be mounted on the second bobbin holder 42 in an axial line. By rotating the turret plate 40, the positions of the first bobbin holder 41 and the second bobbin holder 42 can be changed. Note that if the positions of the first bobbin holder 41 and the second bobbin holder 42 can be changed, another device may be used instead of the turret plate 40.

[0035] The first bobbin holder 41 is rotatable relative to the turret plate 40, with its axial position as the center of rotation. The first bobbin holder 41 is rotationally driven by the first bobbin holder motor 54 shown in Figure 2. Similarly, the second bobbin holder 42 is rotatable relative to the turret plate 40, with its axial position as the center of rotation. The second bobbin holder 42 is rotationally driven by the second bobbin holder motor 55 shown in Figure 2. The first bobbin holder motor 54 and the second bobbin holder motor 55 are controlled by the control device 50.

[0036] As shown in Figure 1, with the first bobbin holder 41 and the second bobbin holder 42 arranged vertically, the yarn 93 is wound onto the first bobbin 91 of the taller first bobbin holder 41 to manufacture the package 94. Hereinafter, the bobbin mounted on the first bobbin holder 41 will be referred to as the first bobbin 91, and the bobbin mounted on the second bobbin holder 42 will be referred to as the second bobbin 92.

[0037] Furthermore, when a predetermined amount of thread 93 is wound onto the first bobbin 91 mounted on the first bobbin holder 41 and the package 94 is fully wound, the turret plate 40 rotates, switching the positions of the first bobbin holder 41 and the second bobbin holder 42. Subsequently, while the fully wound package 94 is being collected, the thread 93 is wound onto the second bobbin 92 mounted on the second bobbin holder 42.

[0038] One end of each bobbin holder 41, 42 (the end facing the turret plate 40) is supported by the turret plate 40. The thread winding machine 1 also includes a support member 74 that supports the other end of each bobbin holder 41, 42 (the end opposite to the turret plate 40) in the position for manufacturing the package 94.

[0039] As shown in Figure 1, the bobbin holders 41 and 42 of the upper winding section 10a pass near the yarn 93 supplied from the yarn feed roller 100 to the lower winding section 10b as the turret plate 40 of the upper winding section 10a rotates. In addition, the rotation of the package 94 formed on the bobbin holders 41 and 42 of the upper winding section 10a generates an accompanying flow. To suppress the accompanying flow from acting on the yarn 93 being wound into the lower winding section 10b, a windbreak plate 75 is provided in the upper winding section 10a. The windbreak plate 75 is not provided in the lower winding section 10b. Note that the windbreak plate 75 can be omitted from the upper winding section 10a.

[0040] Next, the thread winding process and the discard winding process will be explained. The thread winding process is the process in which the operator winds the thread 93 onto the bobbins 91 and 92 in the pre-production stage of package 94 manufacturing. The discard winding process is performed after the thread winding process and involves winding up thread 93 that is of low quality at the start of winding. The thread 93 wound up after the discard winding process is discarded.

[0041] The reasons for the poor quality of the thread 93 are as follows: At the stage when the thread is threaded by the operator, the thread 93 is wound up without being engaged with the traverse guide 23. Also, the traverse guide 23 is driven at a slower speed than usual. Therefore, even after the thread 93 is engaged with the traverse guide 23 after threading, the quality of the thread 93 will be poor until the traverse guide 23 returns to its normal speed.

[0042] Furthermore, in this embodiment, the winding width direction, the axial direction of the package 94, and the axial directions of the bobbin holders 41 and 42 are all parallel. In the following description, these directions will be collectively referred to simply as the "axial direction." Also, the direction in which the thread feed roller 100 is located relative to the thread winding machine 1 will be referred to as the "height direction." In particular, the side of the height direction closer to the thread feed roller 100 will be referred to as the upper side, and the opposite side as the lower side. Also, the direction perpendicular to both the axial direction and the height direction will be referred to as the "orthoaxial direction."

[0043] Figure 3 shows the process from threading and sacrificial winding to the start of manufacturing the package 94. Processes S1 to S7 are related to threading, sacrificial winding, and preparation for these processes. First, processes S1 to S7 are performed on the upper winding section 10a, and then processes S1 to S7 are performed on the lower winding section 10b. Processes S1 to S7 will be explained in detail below.

[0044] First, the operator performs a predetermined first operation on the control panel 32 (S1). The first operation is to notify the thread winding machine 1 that thread winding work is to be performed. The first operation is, for example, to operate a predetermined button on the control panel 32.

[0045] Upon receiving the first operation, the control panel 32 transmits a thread-threading start signal to the control device 50 (S2). The thread-threading start signal is an electrical signal transmitted to the control device 50 when the first operation is performed on the control panel 32. The thread-threading start signal can also be referred to as a signal for threading the first bobbin 91.

[0046] The control device 50 receives a threading start signal and controls the turret motor 53 to rotate the turret plate 40 counterclockwise, thereby aligning the first bobbin holder 41 to the threading position (S3, from state 1 to state 2 in Figure 5). The threading position is the position of the first bobbin holder 41 when the operator performs the threading work.

[0047] Here, with reference to Figure 4, the positions of the bobbin holders 41 and 42 will be explained. When the bobbin holders 41 and 42 are arranged vertically, the position of the higher bobbin holder 41 or 42 is the winding position, and the position of the lower bobbin holder 41 or 42 is the standby position. The yarn winding machine 1 manufactures the package 94 by winding the yarn 93 onto the bobbins 91 and 92 of the bobbin holders 41 and 42 that are in the winding position. The winding position is the position where the bobbins 91 and 92 of the bobbin holders 41 and 42, or the package 94, contact the contact roller 31. The rotation center of the turret plate 40 is referred to as point C. Using point C as the reference (center), the positions of the bobbin holders 41 and 42 (more specifically, the positions of the axes of the bobbin holders 41 and 42) are expressed using angles as follows: That is, the winding position is set to 0° (or 360°), and the standby position is set to 180°. Furthermore, as shown in Figure 4, the direction in which the upper winding section 10a is offset relative to the lower winding section 10b is defined as the offset direction. Here, the offset refers to the offset at the position projected onto a horizontal plane (in other words, the offset in a plan view), and the offset direction is parallel to the direction perpendicular to the axis. The direction of rotation from the winding position in the offset direction (counterclockwise in Figure 4) is defined as positive. In this embodiment, the turret plate 40 rotates only counterclockwise, that is, so that the positions of the bobbin holders 41 and 42 are changed only in the positive direction.

[0048] As shown in Figure 4, the threading position in this embodiment is greater than 270° and less than 360°. If the threading position is between 0° and 180°, the thread 93 will come into contact with the contact roller 31, potentially causing the threading operation to fail. Also, if the threading position is between 180° and 270°, when the turret plate 40 is rotated counterclockwise after the threading operation, the first bobbin 91 on which the thread 93 is wound or the thread layer from the sacrificial winding may come into contact with the windbreak plate 75 (even without the windbreak plate 75, it may interfere with the thread path of the lower winding section 10b). Contact with the windbreak plate 75 can be reliably prevented by positioning the windbreak plate 75 away from the first bobbin 91 in the direction perpendicular to its axis, but in this case, the displacement of the upper winding section 10a relative to the lower winding section 10b becomes larger, resulting in a larger installation area for the thread winding machine 1. For the reasons stated above, the threading position is preferably at a position greater than 270° and less than 360°. Furthermore, if the bobbin holders 41 and 42 are too close to the support member 74 or the windbreak plate 75, the threading operation may become difficult. Moreover, if the bobbin holders 41 and 42 are too close to the contact roller 31, there is a possibility of contact between the thread 93 and the contact roller 31. For this reason, it is even more preferable that the threading position is at a position greater than 290° and less than 340°. In this embodiment, the threading position is set to 300°.

[0049] After aligning the bobbin holder 41 to the threading position, the control device 50 controls the first bobbin holder motor 54 to rotate the first bobbin 91 (S4). Next, the control device 50 drives the traverse device 21 at a low speed (S5). A low speed for the traverse device 21 indicates that the traverse speed is slower compared to when the package 94 is manufactured.

[0050] Next, the operator performs the threading operation (S6). Specifically, the operator holds multiple threads 93 that are on the thread feed roller 100 with a suction gun or the like. Then, the operator winds the held multiple threads 93 onto the bobbin holder 41 of the upper winding section 10a. The upper winding section 10a is also provided with divider guides that hold multiple threads 93 individually while maintaining spacing. The operator holds the threads 93 individually in the divider guides. This completes the threading operation. Also, since the first bobbin holder 41 is already rotated, once the threading operation is completed, the threads 93 are wound onto the first bobbin 91 mounted on the first bobbin holder 41 (waste winding, S7). State 3 in Figure 6 shows the state after the threading operation is completed and waste winding has been performed. After that, processes S1 to S7 are performed on the lower winding section 10b.

[0051] After the processes from S1 to S7 are performed on the upper winding section 10a and the lower winding section 10b, the process to start manufacturing the package 94 is performed. Specifically, the processes from S11 to S16 in Figure 3 correspond to the process to start manufacturing the package 94. First, the processes from S11 to S16 are performed on the upper winding section 10a, and then the processes from S11 to S16 are performed on the lower winding section 10b. The processes from S11 to S16 will be described in detail below.

[0052] First, the operator performs a predetermined second operation on the control panel 32 (S11). The second operation is to notify the yarn winding machine 1 that the production of the package 94 has begun. The second operation is, for example, to operate a predetermined button on the control panel 32. The first and second operations may be the same operation (for example, the same button operation) or different operations (for example, different button operations).

[0053] Upon receiving the second operation, the control panel 32 transmits a manufacturing start signal to the control device 50 (S12). The manufacturing start signal is an electrical signal transmitted to the control device 50 when the second operation is performed on the control panel 32.

[0054] Upon receiving a manufacturing start signal, the control device 50 controls the turret motor 53 to rotate the turret plate 40 counterclockwise, thereby setting the first bobbin holder 41 to the standby position and the second bobbin holder 42 to the winding position (S13, from state 3 in Figure 6 to state 4 in Figure 7).

[0055] Next, the control device 50 switches the winding of the thread 93, which is wound on the first bobbin 91 of the bobbin holder 41, to winding it onto the second bobbin 92 of the second bobbin holder 42 (S14, from state 5 in Figure 7 to state 6 in Figure 8). Specifically, the winding member 81 is pressed against the thread 93 stretched between the first bobbin holder 41 and the second bobbin holder 42 to increase the winding angle of the thread 93 with respect to the second bobbin 92, so that the thread 93 is wound onto the second bobbin 92 of the second bobbin holder 42. This switching of winding of the thread 93 from the bobbin 91 of one bobbin holder 41 to the bobbin 92 of the other bobbin holder 42 is called thread switching, and in this embodiment, thread switching is performed when the bobbin holders 41 and 42 are in the winding position and standby position, respectively. In other words, the thread switching positions are the 0° and 180° positions of the bobbin holders 41 and 42, respectively. The aforementioned manufacturing start signal is also the thread switching signal.

[0056] Next, the control device 50 switches the traverse device 21 from low-speed drive to high-speed drive (S15). High-speed traverse means that the traverse speed of the traverse device 21 is faster than during threading and matches the traverse speed during package 94 manufacturing. Subsequently, the control device 50 controls the lifting motor 63 to lower the traverse device 21 and the contact roller 31 (S16, state 7 in Figure 8). As a result, the contact roller 31 contacts the second bobbin 92 of the second bobbin holder 42, and the manufacturing of the package 94 begins. After this, when the package 94 on the second bobbin 92 becomes a fully wound package 94 of a predetermined diameter, a thread switching signal is issued, thread switching is performed, and the turret plate 40 begins to form a package 94 on the first bobbin 91 of the first bobbin holder 41. Details of this process will be described later. From here on, the formation of a fully wound package 94, thread switching, and the exchange of the fully wound package 94 for new bobbins 91 and 92 are continuously repeated.

[0057] Furthermore, in this embodiment, after positioning the first bobbin holder 41 in the thread-winding position, the turret plate 40 is rotated so that the positions of the bobbin holders 41 and 42 are changed only in the forward direction, until the state in which the thread 93 is wound onto the second bobbin 92 of the second bobbin holder 42 to manufacture the package 94 is reached. Therefore, the control of the turret plate 40 is simple. Also, since the bobbin holder 41 does not come close to the windbreak plate 75 from the thread-winding position to the standby position, it is possible to more reliably prevent the first bobbin holder 41 with the thread 93 wound around it or the waste thread layer from coming into contact with the windbreak plate 75 during the thread-winding operation. Moreover, in this embodiment, the turret plate 40 is rotated so that the positions of the bobbin holders 41 and 42 are changed only in the forward direction, and thread switching is performed at positions where the first bobbin holder 41 and the second bobbin holder 42 are at 0° and 180°, respectively. Therefore, the fully wound package 94 does not come into close proximity to the windbreak plate 75, and this also helps to minimize the amount by which the upper winding section 10a is displaced relative to the lower winding section 10b.

[0058] Next, a modified example of the above embodiment will be described with reference to Figures 4, 9, and 10. Note that the only difference between the above embodiment and this modified example is the control of the turret plate 40; the rest of the configuration of the thread winding machine 1 is the same.

[0059] In the above embodiment, the yarn winding machine 1 performs a sacrificial winding at the yarn winding position. Instead, in this modified example, the yarn winding position and the sacrificial winding position are different. Specifically, as shown in Figure 4, the sacrificial winding position in this modified example is at 120°. This sacrificial winding position can be greater than 0° and less than 180°. When the yarn winding position and the sacrificial winding position are the same, if the sacrificial winding time is long, the yarn layer becomes larger, and there is a possibility that the yarn layer and the windbreak plate 75 will come into contact. In this respect, since the sacrificial winding position in this modified example is spaced away from the windbreak plate 75, contact between the yarn layer and the windbreak plate 75 can be prevented more reliably. The reason why the sacrificial winding position is at 120° in this modified example is as follows. That is, a positioning mechanism is provided so that the turret plate 40 is positioned at the winding position, standby position and yarn switching position, and similarly, a positioning mechanism is provided so that the turret plate 40 is positioned at the yarn winding position. If the sacrificial winding position is set at 120°, the sacrificial winding position will be on the opposite side of the threading position, straddling point C, which is the rotation center of the turret plate 40, thus eliminating the need to install a new positioning mechanism.

[0060] The following describes the processing flow in this modified example with reference to Figures 9 and 10. The processing steps S1 to S6 in Figure 9 are the same as in the above embodiment, so their explanation is omitted.

[0061] After threading, the operator performs a predetermined third operation on the control panel 32 (S7). The third operation is to notify the thread winding machine 1 that threading is complete. The third operation is, for example, to operate a predetermined button on the control panel 32.

[0062] Upon receiving the third operation, the control panel 32 transmits a threading completion signal to the control device 50 (S8). The threading completion signal is an electrical signal transmitted to the control device 50 when the third operation is performed on the control panel 32.

[0063] Upon receiving the threading completion signal, the control device 50 controls the turret motor 53 to rotate the turret plate 40 counterclockwise, thereby aligning the first bobbin holder 41 to the aforementioned sacrificial winding position (S9, from state 3A to state 3B in Figure 10). As a result, sacrificial winding continues at the sacrificial winding position (S10).

[0064] Next, referring to Figures 11 to 13, we will explain the process when a fully wound package 94 is formed on the second bobbin 92 and when new thread 93 is wound onto the first bobbin 91.

[0065] When a fully wound package 94 is formed on the second bobbin 92, the control device 50 controls the turret motor 53 to rotate the turret plate 40 counterclockwise, thereby setting the first bobbin holder 41 to the first switching position and the second bobbin holder 42 to the second switching position (from state A in Figure 11 to state B in Figure 12). Here, the first switching position and the second switching position are the positions of the bobbins 91 and 92 when switching the bobbins 91 and 92 that wind the yarn 93. In detail, the first switching position is the position of the bobbin from which to start winding the yarn 93 (in other words, the bobbin from which the yarn 93 is not wound, the first bobbin 91). The second switching position is the position of the bobbin with the fully wound package 94 (the second bobbin 92). The preferred angular range for the first switching position will be described later.

[0066] Next, the control device 50 switches the process so that the thread 93 wound on the second bobbin 92 (package 94) is wound onto the first bobbin 91 (from state C in Figure 12 to state D in Figure 13). The specific process is the same as the thread switching during the discard winding process described above. Also, the fully wound package 94 on the second bobbin 92 is removed from the second bobbin holder 42, and a new second bobbin 92 (a second bobbin 92 without thread 93 wound on it) is installed in the second bobbin holder 42. Furthermore, from the time the fully wound package 94 is formed on the second bobbin 92 until the new thread 93 is wound onto the first bobbin 91, the turret plate 40 rotates only in the same direction (forward direction).

[0067] Next, the control device 50 controls the lifting motor 63 to lower the traverse device 21 and the contact roller 31 (state E in Figure 13). As a result, the contact roller 31 comes into contact with the first bobbin 91, and the manufacturing of the package 94 begins.

[0068] Next, with reference to Figure 14, the preferred angular range of the first switching position will be described.

[0069] As shown in Figure 14, the first switching position is preferably less than ±45° from 0°. If the first switching position is between 45° and 180°, the second switching position will be between 210° and 360°, causing the fully wound package 94 to be close to the thread path to the lower winding section 10b. Therefore, in order to prevent interference between the fully wound package 94 and the thread path, the displacement of the upper winding section 10a relative to the lower winding section 10b will increase, resulting in a larger installation area for the thread winding machine 1. Consequently, it is undesirable for the first switching position to be between 45° and 180°.

[0070] Furthermore, if the first switching position is between 180° and 315°, it becomes difficult to wind the thread 93 connected to the fully wound package 94 onto the first bobbin 91. Therefore, it is undesirable for the first switching position to be between 180° and 315°.

[0071] Therefore, it is preferable that the first switching position is less than ±45° from 0°. If the first switching position is not 0°, the control device 50 controls the turret motor 53 to rotate the turret plate 40 after switching the yarn 93 wound on the second bobbin 92 to be wound onto the first bobbin 91, thereby adjusting the position of the first bobbin holder 41 to the 0° position (winding position). In other words, if the first switching position is greater than 315° and less than 360°, the control device 50 rotates the turret plate 40 counterclockwise (forward direction) after the above switching. On the other hand, if the first switching position is greater than 0° and less than 45°, the control device 50 rotates the turret plate 40 clockwise (reverse direction) after the above switching. After that, the upper winding unit 10a winds the yarn 93 onto the first bobbin 91 to manufacture the package 94.

[0072] As described above, the yarn winding machine 1 of this embodiment comprises a lower winding section 10b and an upper winding section 10a. The lower winding section 10b winds up the yarn 93 fed from the yarn feed roller 100 to manufacture a package 94. The upper winding section 10a is positioned higher than the lower winding section 10b and, in a plan view, is offset from the lower winding section 10b in a direction perpendicular to the axial direction of the package 94, and winds up the yarn 93 fed from the yarn feed roller 100 to manufacture a package 94. The upper winding section 10a comprises a first bobbin holder 41, a second bobbin holder 42, a turret plate 40, and a contact roller 31. The first bobbin holder 41 holds the first bobbin 91. The second bobbin holder 42 holds the second bobbin 92. The turret plate 40 has a first bobbin holder 41 and a second bobbin holder 42 attached to it, and rotates around a rotation axis parallel to the axial direction of the package 94, thereby changing the positions of the first bobbin holder 41 and the second bobbin holder 42. The contact roller 31 rotates in contact with the first bobbin 91, the second bobbin 92, or the package 94 during the manufacturing of the package 94. With respect to the position in which the turret plate 40 holds the first bobbin holder 41 or the second bobbin holder 42, the position in which the first bobbin 91, the second bobbin 92, or the package 94 contacts the contact roller 31 to wind the yarn 93 onto the first bobbin 91 or the second bobbin 92 and manufacture the package 94 is defined as 0° or 360°, and the direction of rotation from 0° in which the upper winding section 10a is offset relative to the lower winding section 10b is defined as positive. When the turret plate 40 receives a signal to wind the yarn 93 onto the first bobbin 91 (thread winding start signal), it adjusts the position of the first bobbin holder 41 to a position greater than 270° and less than 360°.

[0073] This makes it possible to minimize the amount of displacement of the upper winding section 10a relative to the lower winding section 10b, thereby reducing the installation area of ​​the thread winding machine 1.

[0074] In the thread winding machine 1 of this embodiment, the turret plate 40 receives a signal to put thread 93 onto the first bobbin 91 and adjusts the position of the first bobbin holder 41 to a position greater than 290° and less than 340°.

[0075] This allows the thread to be threaded in the upper winding section at a position further away from the thread path of the lower winding section 10b, and at a position that further avoids the possibility of contact between the thread 93 and the contact roller 31.

[0076] In the thread winding machine 1 of this embodiment, the turret plate 40 receives a signal (thread switching signal) to switch the thread so that when the thread 93 is wound on the first bobbin 91, the thread 93 is wound on the second bobbin 92, or when the thread 93 is wound on the second bobbin 92, the thread 93 is wound on the first bobbin 91. The turret plate 40 adjusts the position of one of the first bobbin holder 41 and the second bobbin holder 42 to 180° and the position of the other to 0°.

[0077] This allows the thread switching to be performed when, after thread 93 has been placed on the first bobbin 91, the thread 93 currently wound on the first bobbin 91 is wound onto the second bobbin 92, or when, after the start of package 94 manufacturing, the thread switching is performed to wind the thread 93 currently wound on the first bobbin 91 or second bobbin 92 of a fully wound package 94 onto the second bobbin 92 or first bobbin 91 that does not have thread 93 wound on it, the first bobbin 91 and second bobbin 92 are positioned far from the thread path of the lower winding section 10b.

[0078] In the thread winding machine 1 of this embodiment, from the state in which thread 93 is placed on the first bobbin 91 to the state in which thread 93 is wound onto the second bobbin 92 to manufacture the package 94, the turret plate 40 rotates so that the positions of the first bobbin holder 41 and the second bobbin holder 42 are changed only in the forward direction.

[0079] The control of the turret plate 40 can be simplified. Also, since the first bobbin 91, on which a thread layer has been formed by the sacrificial winding, does not pass on the side of the lower winding section 10b that is close to the thread path, the amount of displacement can be reduced.

[0080] In the thread winding machine 1 of this embodiment, upon receiving a signal to put thread 93 onto the first bobbin 91, the position of the first bobbin holder 41 is set to a position greater than 270° and less than 360°. Then, upon receiving a signal indicating that the process of putting thread 93 onto the first bobbin 91 is complete (thread-threading completion signal), the position of the first bobbin holder 41 is set to a position greater than 0° and less than 180°.

[0081] This prevents the first bobbin 91 from becoming thicker when wound at a position greater than 270° and less than 360°, thus making it less likely for the first bobbin 91 or its thread layer to interfere with the thread path of the lower winding section 10b.

[0082] In the yarn winding machine 1 of this embodiment, the upper winding section 10a is equipped with a windbreak plate 75 that suppresses the accompanying flow generated by the rotation of the package 94 formed on the first bobbin holder 41 or the second bobbin holder 42 from acting on the yarn 93 being wound in the lower winding section 10b.

[0083] By providing the windbreak plate 75, the influence of accompanying flow on the thread 93 can be reduced.

[0084] In the yarn winding machine 1 of this embodiment, when the package 94 formed on the second bobbin 92 is fully wound, the turret plate 40 adjusts the position of the first bobbin holder 41 to a position less than ±45° from 0°, and switches the yarn 93 wound on the second bobbin 92 to be wound onto the first bobbin 91.

[0085] As a result, the fully wound package 94 does not pass through an area close to the thread path to the lower winding section 10b. Therefore, the amount of displacement of the upper winding section 10a can be further reduced. In addition, the process of winding the thread 93 connected to the package 94 onto the first bobbin 91 can be easily performed.

[0086] Although preferred embodiments of the present invention have been described above, the above configuration can be modified as follows, for example.

[0087] 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.

[0088] The process diagrams shown in the above embodiments and modifications are examples only, and some processes may be omitted, some processes may be modified, or new processes may be added. [Explanation of symbols]

[0089] 1. Thread winding machine 10a Upper winding section 10b Lower winding section 21 Traverse device 31 Contact roller 40. Turret plate (bobbin holder movement mechanism) 41 First bobbin holder 42. Second bobbin holder 50 Control device 91 First bobbin 92. Second bobbin 93 thread 94 packages 100 thread feed rollers

Claims

1. a lower winding unit that winds the yarn fed from the yarn feed roller to produce a package; an upper winding section that is disposed at a position higher than the lower winding section and that is displaced in a direction perpendicular to the axial direction of the package relative to the lower winding section in a plan view, and that winds the yarn fed from the yarn feed roller to produce the package; Equipped with The upper winding section is a first bobbin holder that holds a first bobbin; a second bobbin holder that holds the second bobbin; a bobbin holder moving mechanism to which the first bobbin holder and the second bobbin holder are attached, the bobbin holder moving mechanism rotating about a rotation axis parallel to an axial direction of the package to change positions of the first bobbin holder and the second bobbin holder; a contact roller that rotates in contact with the first bobbin, the second bobbin, or the package during manufacturing of the package; Equipped with With respect to the position where the bobbin holder moving mechanism holds the first bobbin holder or the second bobbin holder, when the first bobbin, the second bobbin, or the package contacts the contact roller to wind the yarn onto the first bobbin or the second bobbin to manufacture the package, the position is defined as 0° or 360°, and the direction of rotation from 0° in a direction in which the upper winding section is offset relative to the lower winding section is defined as positive. The bobbin holder moving mechanism adjusts the position of the first bobbin holder to a position greater than 270° and less than 360° upon receiving a signal to wind the yarn onto the first bobbin.

2. The yarn winding machine according to claim 1, The bobbin holder moving mechanism adjusts the position of the first bobbin holder to a position greater than 290° and less than 340° upon receiving a signal to wind the yarn onto the first bobbin.

3. The yarn winding machine according to claim 1, the upper winding section is provided with a windshield that prevents an accompanying flow generated by rotation of the package formed in the first bobbin holder or the second bobbin holder from acting on the yarn being wound in the lower winding section.

4. The yarn winding machine according to claim 1, the bobbin holder moving mechanism, when the package formed on the second bobbin is fully wound, switches the position of the first bobbin holder to a position less than ±45° from 0° as a reference, and switches the position of the first bobbin holder so that the yarn wound on the second bobbin is wound onto the first bobbin.

5. A yarn winding machine according to claim 1, the bobbin holder moving mechanism receives a signal to hook a yarn onto the first bobbin and adjusts the position of the first bobbin holder to a position greater than 290° and less than 340°; the upper winding section is provided with a windshield that prevents an accompanying flow generated by rotation of the package formed in the first bobbin holder or the second bobbin holder from acting on the yarn being wound in the lower winding section.

6. A yarn winding machine according to claim 1, the bobbin holder moving mechanism receives a signal to hook a yarn onto the first bobbin and adjusts the position of the first bobbin holder to a position greater than 290° and less than 340°; the bobbin holder moving mechanism, when the package formed on the second bobbin is fully wound, switches the position of the first bobbin holder to a position less than ±45° from 0° as a reference, and switches the position of the first bobbin holder so that the yarn wound on the second bobbin is wound onto the first bobbin.

7. A yarn winding machine according to claim 1, the upper winding section includes a windshield that suppresses an accompanying flow generated by rotation of the package formed on the first bobbin holder or the second bobbin holder from acting on the yarn being wound on the lower winding section, the bobbin holder moving mechanism, when the package formed on the second bobbin is fully wound, switches the position of the first bobbin holder to a position less than ±45° from 0° as a reference, and switches the position of the first bobbin holder so that the yarn wound on the second bobbin is wound onto the first bobbin.

8. A yarn winding machine according to claim 1, the bobbin holder moving mechanism receives a signal to hook a yarn onto the first bobbin and adjusts the position of the first bobbin holder to a position greater than 290° and less than 340°; the upper winding section includes a windshield that suppresses an accompanying flow generated by rotation of the package formed on the first bobbin holder or the second bobbin holder from acting on the yarn being wound on the lower winding section, the bobbin holder moving mechanism, when the package formed on the second bobbin is fully wound, switches the position of the first bobbin holder to a position less than ±45° from 0° as a reference, and switches the position of the first bobbin holder so that the yarn wound on the second bobbin is wound onto the first bobbin.

9. The yarn winding machine according to any one of claims 1 to 8, The bobbin holder moving mechanism receives a signal for switching the thread so that, when a thread is wound on the first bobbin, the thread is wound onto the second bobbin, or, when a thread is wound on the second bobbin, the thread is wound onto the first bobbin, and adjusts the position of one of the first bobbin holder and the second bobbin holder to 180° and the position of the other to 0°.

10. The yarn winding machine according to any one of claims 1 to 8, a bobbin holder moving mechanism that rotates so that the positions of the first bobbin holder and the second bobbin holder are changed only in a forward direction from a state in which the yarn is wound onto the first bobbin to a state in which the yarn is wound onto the second bobbin to produce a package.

11. The yarn winding machine according to any one of claims 1 to 8, The bobbin holder moving mechanism includes: Upon receiving a signal to wind a yarn onto the first bobbin, the position of the first bobbin holder is adjusted to a position greater than 270° and less than 360°, a yarn winding machine, characterized in that, upon receiving a signal indicating that the operation of winding the yarn onto the first bobbin has been completed, the position of the first bobbin holder is adjusted to a position greater than 0° and less than 180°.

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