Yarn threading unit and blended yarn manufacturing device

Abstract

To provide an apparatus which, while operating a suction gun with both hands, makes it possible to perform a thread hooking work of winding a first group thread sequentially with respect to a plurality of godet rollers, and can greatly shorten the time required for the thread hooking work, and can greatly reduce yarn waste generated.SOLUTION: Provided is a mixed yarn manufacturing apparatus 1 which comprises godet rollers 31 to 35 for heating and stretching a first group yarn Y1, a warming box 30 having a box 38 for housing the godet rollers 31 to 35, and a guide roller 36 for guiding a second group yarn Y2, and is configured to combine the yarn Y1 and the yarn Y2 to manufacture a mixed yarn Y3. In the apparatus, a thread hooking unit 5 is used during the thread hooking work. The thread hooking unit 5 comprises a mounting portion 51 to the box 38 and a thread hooking portion 52 which extends along an edge of the box 38 closer to the guide roller 36 than the godet rollers 31 to 35 and on which the thread Y2 is to be hooked. The thread hooking portion 52 extends at a position protruding from an end face of the godet rollers 31 to 35.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a threading unit used in a mixed yarn manufacturing apparatus that produces a mixed yarn by dividing multiple yarns spun from a spinning device into a first group of yarns and a second group of yarns, applying a drawing process to at least the first group of yarns, and then doubling the first group of yarns with the second group of yarns, and to a mixed yarn manufacturing apparatus equipped with the threading unit. [Background technology]

[0002] Fully drawn yarn (FDY: Fully Draw) is a yarn that has been drawn. n The shrinkage rate of a partially oriented yarn (POY), which is a yarn that has not been subjected to a drawing process, is different from that of a partially oriented yarn (POY). A blended yarn (BSY: Bi Shrinkage Yarn) made by combining two types of yarn with different shrinkage rates is known for its good texture, and devices for producing the blended yarn have been proposed.

[0003] For example, in the device of Patent Document 1, some of the yarns spun from the spinning device are heated and drawn by five heating rollers 31-35 configured as godet rollers having heating sections, to form drawn yarns. Meanwhile, the remaining yarns spun from the spinning device are passed through guide roller 36 without passing through heating rollers 31-33, which are located upstream in the yarn running direction, of the five heating rollers 31-35, to form partially oriented yarns. The drawn yarns and the partially oriented yarns are then combined to form a mixed yarn. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-102835 Summary of the Invention [Problem to be solved by the invention]

[0005] In the production of a blended yarn, a threading operation is performed in which multiple yarns spun from a spinning machine are sucked into a suction gun, the multiple yarns are separated into a first group of yarns and a second group of yarns, and the first group of yarns are wound around multiple godet rollers having heating units while the second group of yarns are wound around a guide roller. During this threading operation, when separating the multiple yarns into the first group of yarns and the second group of yarns, the worker first holds the suction gun in one hand and a yarn separating tool with the other hand that can hook the yarns at their tip end. While sucking the spun multiple yarns into the suction gun held in one hand, the worker separates the spun multiple yarns into the first group of yarns and the second group of yarns using the yarn separating tool held in the other hand. Next, the worker operates the position of the suction gun to sequentially wind the first group of yarns around multiple godet rollers while winding the second group of yarns around a guide roller. At this time, the operator must perform the threading operation by sequentially winding the yarns of the first group around the multiple godet rollers while maintaining the yarn paths of the yarns of the first group separate from the yarn paths of the yarns of the second group to prevent the yarns of the second group from being wound around the multiple godet rollers in the same way as the yarns of the first group.

[0006] During the above-mentioned threading operation, the worker had to operate a heavy suction gun with one hand and a yarn separating device with the other, maintaining the yarn path for the first group of yarns separate from the yarn path for the second group of yarns while sequentially winding the first group of yarns around multiple godet rollers. This required the worker to operate the heavy suction gun with one hand while maintaining the yarn path for the first group of yarns separate from the yarn path for the second group of yarns, which placed a heavy burden on the worker and made the threading operation difficult and time-consuming. Furthermore, as the operation time increased, the amount of yarn sucked into the suction gun also increased, resulting in an increase in the amount of lint generated.

[0007] In view of the above-mentioned circumstances, the present invention aims to provide a yarn threading unit and a mixed yarn manufacturing apparatus equipped with the yarn threading unit, which enable easy threading work in which a first group of yarns is wound sequentially around a plurality of godet rollers while operating the suction gun with both hands, thereby significantly shortening the time required for the threading work and reducing the amount of yarn sucked into the suction gun and thereby significantly reducing the amount of yarn waste generated. [Means for solving the problem]

[0008] (1) In order to solve the above-mentioned problems, a yarn threading unit according to one aspect of the present invention is a mixed yarn manufacturing apparatus that produces a mixed yarn by doubling the yarns of the first group and the yarns of the second group, the mixed yarn manufacturing apparatus comprising: a plurality of godet rollers each having a heat source, around which at least a first group of yarns separated as a part of a plurality of yarns spun from a spinning device are wound, and which heat and draw at least the yarns of the first group; a heat-insulating box having a box body that houses the plurality of godet rollers and a door for opening and closing the box body; and a guide roller that guides a second group of yarns separated from the plurality of yarns as a yarn other than the yarns of the first group. The yarn hooking unit is used when winding the first group of yarns onto the plurality of godet rollers while winding the yarn onto the guide roller, and comprises: an attachment part that can be detachably attached to the box body; and a yarn hooking part that is arranged to extend along the edge of the box body closer to the guide roller than the plurality of godet rollers when the attachment part is attached to the box body, and to which the second group of yarns is hooked; and the yarn hooking part is arranged to extend along the edge of the box body at a position that protrudes further than the end faces of the plurality of godet rollers in the axial direction of the godet rollers when the attachment part is attached to the box body.

[0009] According to the configuration of the present invention, when threading is performed in a mixed yarn manufacturing apparatus for producing a mixed yarn, a threading unit is first attached to the box body of an insulated box at an edge of the box body that is closer to the guide roller than the godet rollers. The threading portion of the threading unit is positioned so as to extend along the edge of the box body at a position that protrudes beyond the end faces of the godet rollers in the axial direction of the godet rollers. Then, threading is performed in this state. When threading begins, an operator uses a suction gun to suck in multiple yarns spun from the spinning device and separates the multiple yarns into a first group of yarns and a second group of yarns. The separated second group of yarns is wound around a guide roller that is located closer to the threading unit than the godet rollers. Then, while holding the suction gun with both hands, the operator manipulates the position of the suction gun to sequentially wind the first group of yarns around the multiple godet rollers. At this time, the second group of yarns wound around the guide roller and sucked into the suction gun is caught on a yarn hook of the yarn hooking unit that extends along the edge of the box body at a position that protrudes further outward from the box body than the godet rollers and further protrudes further than the end faces of the godet rollers in the axial direction of the godet rollers, in the yarn path leading from the guide roller to the suction port of the suction gun. Therefore, when the operator holds the suction gun with both hands and operates it to sequentially wind the first group of yarns around the godet rollers, the second group of yarns remains caught on the yarn hook of the yarn hooking unit. As a result, while the yarn of the first group is being wound around the godet rollers, the yarn path of the second group is maintained in a state where a portion of the yarn path of the second group between the guide roller and the suction gun protrudes further outward from the box body than the godet rollers and bypasses a position protruding further axially than the end faces of the godet rollers, thereby preventing the yarn of the second group from being wound around the godet roller along the same yarn path as the yarn of the first group.Therefore, the operator can easily perform the threading operation of sequentially winding the first group of yarns around multiple godet rollers while operating the heavy suction gun with both hands and keeping the yarn paths for the first group of yarns separate from those for the second group of yarns. Furthermore, because the threading operation can be easily performed, the time required for the threading operation can be significantly reduced. Furthermore, the significant reduction in the threading operation time reduces the amount of yarn sucked into the suction gun during the operation, significantly reducing the amount of lint generated.

[0010] Therefore, according to the configuration of the present invention, a threading unit can be provided that allows the user to easily perform the threading work of sequentially winding the first group of yarn around multiple godet rollers while operating the suction gun with both hands, significantly shortening the time required for the threading work and reducing the amount of yarn sucked into the suction gun, thereby significantly reducing the amount of yarn waste generated.

[0011] (2) The yarn hooking portion may have a rod-shaped portion that extends linearly along an edge of the box body that is closer to the guide roller than the plurality of godet rollers when the mounting portion is attached to the box body.

[0012] With this configuration, the threading unit can be easily configured with a simple structure that includes a threading section with a linear rod-like portion and an attachment section to the box body. That is, a threading unit can be easily configured with a simple structure that allows the user to operate the suction gun with both hands and easily perform the threading operation of winding the first group of yarn around multiple godet rollers while maintaining the yarn paths for the first and second groups of yarn separated.

[0013] (3) The yarn hooking portion may have a portion that extends in a flat plate shape along an edge of the box body that is closer to the guide roller than the plurality of godet rollers when the attachment portion is attached to the box body.

[0014] This configuration allows for a simple threading unit to be easily constructed, with a thread hooking section having a flat extending section and a section to be attached to the box body. In other words, a threading unit with a simple structure can be easily constructed, allowing the user to operate the suction gun with both hands and easily perform the threading operation of winding the first group of yarns around multiple godet rollers while maintaining the yarn paths for the first and second groups of yarns separate.

[0015] It should be noted that the threading unit according to the present invention does not necessarily have to include all of the configurations described in (1) to (3) above. For example, the configurations described in (2) to (3) above are not essential to the invention relating to the threading unit described in (1) above. Furthermore, the threading unit according to the present invention can be any combination of the configuration described in (1) above and some of the configurations described in (2) to (3) above, as long as consistency can be achieved. For example, the threading unit according to the present invention can be a combination of the configuration described in (1) above with the configuration described in (2) above, or a combination of the configuration described in (1) above with the configuration described in (3) above.

[0016] (4) In order to solve the above-mentioned problems, a yarn threading unit according to one aspect of the present invention is a mixed yarn manufacturing apparatus that produces a mixed yarn by doubling the yarns of the first group and the yarns of the second group, the mixed yarn manufacturing apparatus comprising: a plurality of godet rollers each having a heat source, around which at least a first group of yarns separated as a part of a plurality of yarns spun from a spinning apparatus are wound, and which heat and draw at least the first group of yarns; a heat-insulating box having a box body that houses the plurality of godet rollers and a door for opening and closing the box body; and a guide roller that guides a second group of yarns separated as a yarn other than the first group of yarns from the plurality of yarns, the mixed yarn manufacturing apparatus producing a mixed yarn by doubling the yarns of the first group and the yarns of the second group. a threading unit used when winding the first group of yarns onto the plurality of godet rollers while winding the first group of yarns onto the plurality of godet rollers, the threading unit comprising: an attachment part that is detachably attached to the box body; and a thread hooking part, on which the second group of yarns is hooked, the thread hooking part being spaced apart from the plurality of godet rollers and extending along the edge of the side wall of the box body on which the guide roller is disposed when the attachment part is attached to the box body; wherein the thread hooking part is extended along the edge of the side wall of the box body at a position that protrudes beyond the end faces of the plurality of godet rollers in the axial direction of the godet rollers when the attachment part is attached to the box body.

[0017] According to the configuration of the present invention, when threading is performed in a mixed yarn manufacturing apparatus for producing a mixed yarn, a threading unit is first attached to the box body of an insulated box, at a position spaced apart from the godet rollers and at the edge of the side wall of the box body where the guide roller is disposed. The threading portion of the threading unit is disposed so as to extend along the edge of the side wall of the box body, protruding beyond the end faces of the godet rollers in the axial direction of the godet rollers. Then, threading is performed in this state. When threading begins, an operator uses a suction gun to suck the multiple yarns spun from the spinning device and separates the multiple yarns into a first group of yarns and a second group of yarns. The separated second group of yarns is wound around a guide roller spaced apart from the godet rollers and disposed on the side wall of the box body where the threading unit is attached. Then, while holding the suction gun that sucks in the multiple yarns with both hands, the operator operates the suction gun to sequentially wind the first group of yarns around the multiple godet rollers. At this time, the second group of yarns that has been wound around the guide roller and sucked into the suction gun is caught on a yarn hook of the yarn hooking unit that extends along the edge of the side wall of the box body at a position that protrudes outward from the multiple godet rollers and protrudes beyond the end faces of the godet rollers in the axial direction of the godet rollers, in the yarn path leading from the guide roller to the suction port of the suction gun. Therefore, when the operator operates the suction gun with both hands to sequentially wind the first group of yarns around the multiple godet rollers, the second group of yarns remains hooked on the yarn hook of the yarn hooking unit. As a result, while the yarn of the first group is being wound around the godet rollers, the yarn path of the second group is maintained in a state where a portion of the yarn path of the second group between the guide roller and the suction gun protrudes further outward from the box body than the godet rollers and bypasses a position protruding further axially than the end faces of the godet rollers, thereby preventing the yarn of the second group from being wound around the godet roller along the same yarn path as the yarn of the first group.Therefore, the operator can easily perform the threading operation of sequentially winding the first group of yarns around multiple godet rollers while operating the heavy suction gun with both hands and keeping the yarn paths for the first group of yarns separate from those for the second group of yarns. Furthermore, because the threading operation can be easily performed, the time required for the threading operation can be significantly reduced. Furthermore, the significant reduction in the threading operation time reduces the amount of yarn sucked into the suction gun during the operation, significantly reducing the amount of lint generated.

[0018] Therefore, according to the configuration of the present invention, a threading unit can be provided that allows the user to easily perform the threading work of sequentially winding the first group of yarn around multiple godet rollers while operating the suction gun with both hands, significantly shortening the time required for the threading work and reducing the amount of yarn sucked into the suction gun, thereby significantly reducing the amount of yarn waste generated.

[0019] (5) In order to solve the above problem, a mixed yarn manufacturing apparatus according to one aspect of the present invention includes a plurality of godet rollers each having a heat source, around which at least a first group of yarns separated as a part of a plurality of yarns spun from a spinning device are wound and which heat and draw at least the first group of yarns; a heat-insulating box having a box body that houses the plurality of godet rollers and a door for opening and closing the box body; a guide roller that guides a second group of yarns separated from the plurality of yarns as yarns other than the first group of yarns; and a doubling unit that combines the first group of yarns with the second group of yarns to produce a mixed yarn. The box includes a threading device and a threading unit used when winding the second group of threads onto the guide roller while winding the first group of threads onto the plurality of godet rollers, wherein the threading unit has an attachment portion attached to the box body and a threading portion extending along the edge of the box body closer to the guide roller than the plurality of godet rollers, and on which the second group of threads is hooked, and the threading portion is arranged to extend along the edge of the box body at a position protruding beyond the end faces of the plurality of godet rollers in the axial direction of the godet rollers.

[0020] According to the configuration of the present invention, when threading is performed in the production of a mixed yarn, a yarn threading unit is attached to the box body of an insulated box at an edge of the box body that is closer to the guide roller than the godet rollers. The yarn threading portion of the yarn threading unit is disposed so as to extend along the edge of the box body at a position that protrudes beyond the end faces of the godet rollers in the axial direction of the godet rollers. In this state, the yarn threading is performed. When the yarn threading operation begins, an operator uses a suction gun to suck in multiple yarns spun from the spinning device and separates the multiple yarns into a first group of yarns and a second group of yarns. The separated second group of yarns is wound around a guide roller that is located closer to the yarn threading unit than the godet rollers. Then, while holding the suction gun with both hands, the operator operates the position of the suction gun to sequentially wind the first group of yarns around the multiple godet rollers. At this time, the second group of yarns wound around the guide roller and sucked into the suction gun are hooked on a yarn hooking portion of the yarn hooking unit, which extends along the edge of the box body at a position protruding outward from the godet rollers and protruding beyond the end faces of the godet rollers in the axial direction, in the yarn path from the guide roller to the suction port of the suction gun. Therefore, when an operator holds the suction gun with both hands and operates it to sequentially wind the first group of yarns around the godet rollers, the second group of yarns is maintained hooked on the yarn hooking portion of the yarn hooking unit. As a result, throughout the winding of the first group of yarns around the godet rollers, the yarn path of the second group of yarns is maintained in a state in which it bypasses a position protruding outward from the box body and protruding beyond the end faces of the godet rollers between the guide roller and the suction gun. This prevents the yarn of the second group from being wound around the godet roller along the same yarn path as the yarn of the first group. Therefore, the operator can easily perform the threading operation of sequentially winding the yarn of the first group around multiple godet rollers by operating the heavy suction gun with both hands while keeping the yarn paths of the yarns of the first group and the second group separate.Furthermore, because threading can be easily performed, the time required for threading can be significantly reduced. Furthermore, by significantly reducing the time required for threading, the amount of thread sucked into the suction gun during threading can be reduced, significantly reducing the amount of thread waste generated.

[0021] Therefore, according to the configuration of the present invention, a mixed yarn manufacturing apparatus can be provided that allows the user to easily perform the threading operation of sequentially winding the first group of yarn around multiple godet rollers while operating the suction gun with both hands, significantly shortening the time required for the threading operation and significantly reducing the amount of yarn sucked into the suction gun and thereby reducing the amount of yarn waste generated.

[0022] (6) In order to solve the above-mentioned problems, a mixed yarn manufacturing apparatus according to one aspect of the present invention includes a plurality of godet rollers each having a heat source, around which at least a first group of yarns separated as a part of a plurality of yarns spun from a spinning device are wound and which heat and draw at least the first group of yarns; a heat-insulating box having a box body for accommodating the plurality of godet rollers and a door for opening and closing the box body; a guide roller for guiding a second group of yarns separated as a yarn other than the first group of yarns from the plurality of yarns; a doubling device for doubling the first group of yarns with the second group of yarns to produce a mixed yarn; and a threading unit used when winding the first group of threads onto the guide roller while winding the second group of threads onto the plurality of godet rollers, wherein the threading unit has an attachment portion attached to the box body, and a threading portion that is spaced apart from the plurality of godet rollers and extends along the edge of the side wall of the box body on which the guide rollers are arranged, and on which the second group of threads is hung, and the threading portion is arranged to extend along the edge of the side wall of the box body at a position that protrudes further than the end faces of the plurality of godet rollers in the axial direction of the godet rollers.

[0023] According to the configuration of the present invention, when a threading operation is performed in the production of a mixed fiber yarn, a threading unit is attached to the box body of an insulated box, spaced apart from the godet rollers, at the edge of the side wall of the box body where the guide roller is located. The threading portion of the threading unit is disposed so as to extend along the edge of the side wall of the box body, protruding beyond the end faces of the godet rollers in the axial direction of the godet rollers. The threading operation is performed in this state. When the threading operation begins, an operator uses a suction gun to suck in multiple yarns spun from the spinning device and separates the multiple yarns into a first group of yarns and a second group of yarns. The separated second group of yarns is wound around a guide roller spaced apart from the godet rollers and located on the side wall of the box body where the threading unit is attached. Then, while holding the suction gun with both hands, the operator manipulates the position of the suction gun to sequentially wind the first group of yarns around the multiple godet rollers. At this time, the second group of yarns wound around the guide roller and sucked into the suction gun are caught on a yarn hook of the yarn hooking unit, which extends along the edge of the side wall of the box body at a position that protrudes further outward from the box body than the godet rollers and further protrudes further than the end faces of the godet rollers in the axial direction of the godet rollers, in the yarn path leading from the guide roller to the suction port of the suction gun. Therefore, when the operator holds the suction gun with both hands and operates it to sequentially wind the first group of yarns around the godet rollers, the second group of yarns remains caught on the yarn hook of the yarn hooking unit. As a result, while the yarn of the first group is being wound around the godet rollers, the yarn path of the second group is maintained in a state where a portion of the yarn path of the second group between the guide roller and the suction gun protrudes further outward from the box body than the godet rollers and bypasses a position protruding further axially than the end faces of the godet rollers, thereby preventing the yarn of the second group from being wound around the godet roller along the same yarn path as the yarn of the first group.Therefore, the operator can easily perform the threading operation of sequentially winding the first group of yarns around multiple godet rollers while operating the heavy suction gun with both hands and keeping the yarn paths for the first group of yarns separate from those for the second group of yarns. Furthermore, because the threading operation can be easily performed, the time required for the threading operation can be significantly reduced. Furthermore, the significant reduction in the threading operation time reduces the amount of yarn sucked into the suction gun during the operation, significantly reducing the amount of lint generated.

[0024] Therefore, according to the configuration of the present invention, a mixed yarn manufacturing apparatus can be provided that allows the user to easily perform the threading operation of sequentially winding the first group of yarn around multiple godet rollers while operating the suction gun with both hands, significantly shortening the time required for the threading operation and significantly reducing the amount of yarn sucked into the suction gun and thereby reducing the amount of yarn waste generated. [Effects of the Invention]

[0025] According to the present invention, it is possible to provide a yarn threading unit and a mixed yarn manufacturing apparatus equipped with the yarn threading unit, which enable the user to easily perform the yarn threading operation of sequentially winding the first group of yarn around multiple godet rollers while operating the suction gun with both hands, thereby significantly shortening the time required for the yarn threading operation and reducing the amount of yarn sucked into the suction gun and thereby significantly reducing the amount of yarn waste generated. [Brief explanation of the drawings]

[0026] [Figure 1] FIG. 1 is a diagram for explaining a mixed yarn manufacturing apparatus using a threading unit according to the first embodiment of the present invention and a mixed yarn manufacturing apparatus according to the first embodiment of the present invention, and is a front view showing a mixed yarn manufacturing apparatus that manufactures mixed yarn without heat setting a partially oriented yarn. [Figure 2] FIG. 2 is a front view showing a spinning and drawing device in the mixed yarn manufacturing apparatus shown in FIG. [Figure 3] FIG. 3 is a perspective view of the spinning and drawing apparatus shown in FIG. 2. [Figure 4] 1 is a perspective view showing a threading unit according to a first embodiment of the present invention. [Figure 5] FIG. 5 is a side view of the threading unit shown in FIG. [Figure 6] FIG. 5 is a perspective view showing a state in which the threading unit shown in FIG. 4 is attached to a heat insulation box of a spinning / drawing device of the mixed yarn manufacturing apparatus. [Figure 7] FIG. 5 is a side view showing the state in which the threading unit shown in FIG. 4 is attached to the heat insulation box of the spinning / drawing device of the mixed yarn manufacturing apparatus. [Figure 8] FIG. 2 is a diagram showing a state in which threading work is being performed using the threading unit in the mixed yarn manufacturing apparatus shown in FIG. 1, in which the first group of yarns is wound around the yarn feed roller outside the thermal insulation box, and the second group of yarns is wound around the guide roller. [Figure 9] FIG. 2 is a diagram showing a state in which threading work is being performed using a threading unit in the mixed yarn manufacturing apparatus shown in FIG. 1, and shows a state in which the first group of yarn is being wound around the first godet roller in the yarn running direction. [Figure 10] FIG. 2 is a diagram showing a state in which threading work is being performed using a threading unit in the mixed yarn manufacturing apparatus shown in FIG. 1, and shows a state in which the first group of yarn is being wound around the second godet roller in the yarn running direction. [Figure 11] FIG. 2 is a diagram showing a state in which threading work is being performed using a threading unit in the mixed yarn manufacturing apparatus shown in FIG. 1, and shows a state in which the first group of yarn is being wound around the third godet roller in the yarn running direction. [Figure 12] FIG. 2 is a diagram showing a state in which threading work is being performed using a threading unit in the mixed yarn manufacturing apparatus shown in FIG. 1, and shows a state in which the first group of yarn is being wound around the fourth godet roller in the yarn running direction. [Figure 13] FIG. 2 is a diagram showing a state in which threading work is being performed using a threading unit in the mixed yarn manufacturing apparatus shown in FIG. 1, and shows a state in which the first group of yarn is being wound around the fifth godet roller in the yarn running direction. [Figure 14] FIG. 2 is a diagram showing a state in which threading work is being performed using a threading unit in the mixed yarn manufacturing apparatus shown in FIG. 1, in which the first group of yarns is wound around all godet rollers and the second group of yarns is wound around the guide rollers. [Figure 15] FIG. 10 is a perspective view showing a threading unit according to a first modified example. [Figure 16] FIG. 16 is a side view of the threading unit shown in FIG. [Figure 17] FIG. 16 is a perspective view showing the state in which the threading unit shown in FIG. 15 is attached to the heat insulation box of the spinning and drawing device of the mixed yarn manufacturing apparatus. [Figure 18] FIG. 10 is a perspective view showing a threading unit according to a second modified example. [Figure 19] FIG. 19 is a side view of the threading unit shown in FIG. 18. [Figure 20] FIG. 19 is a perspective view showing the state in which the threading unit shown in FIG. 18 is attached to the heat insulation box of the spinning / drawing device of the mixed yarn manufacturing apparatus. [Figure 21] FIG. 10 is a perspective view showing a state in which a yarn threading unit according to a third modified example is attached to a spinning and drawing device of a mixed yarn manufacturing apparatus. [Figure 22] FIG. 1 is a diagram for explaining a mixed yarn production apparatus using a threading unit according to a second embodiment of the present invention and a mixed yarn production apparatus according to a second embodiment of the present invention, and is a front view showing a mixed yarn production apparatus that produces a mixed yarn by heat setting a partially oriented yarn. [Figure 23] FIG. 23 is a front view showing a spinning and drawing device in the mixed yarn manufacturing apparatus shown in FIG. 22. [Figure 24] FIG. 24 is a perspective view of the spinning and drawing apparatus shown in FIG. 23. [Figure 25] FIG. 10 is a perspective view showing a threading unit according to a second embodiment of the present invention. [Figure 26] FIG. 26 is a front view showing the state in which the threading unit shown in FIG. 25 is attached to the heat insulation box of the spinning / drawing device of the mixed yarn manufacturing apparatus. [Figure 27]FIG. 23 is a diagram showing a state in which threading work is being performed using the threading unit in the mixed yarn manufacturing apparatus shown in FIG. 22, in which the first group of yarns is wound around the yarn feed roller outside the thermal insulation box, and the second group of yarns is wound around the guide roller. [Figure 28] FIG. 23 is a diagram showing a state in which threading work is being performed using a threading unit in the mixed yarn manufacturing apparatus shown in FIG. 22, and shows a state in which the first group of yarn is being wound around the first godet roller in the yarn running direction. [Figure 29] FIG. 23 is a diagram showing a state in which threading work is being performed using a threading unit in the mixed yarn manufacturing apparatus shown in FIG. 22, and shows a state in which the first group of yarn is being wound around the second godet roller in the yarn running direction. [Figure 30] FIG. 23 is a diagram showing the state in which threading work is being performed using the threading unit in the mixed yarn manufacturing apparatus shown in FIG. 22, and shows the state in which the first group of yarn is being wound around the third godet roller in the yarn running direction. [Figure 31] FIG. 23 is a diagram showing a state in which threading is being performed using a threading unit in the mixed yarn manufacturing apparatus shown in FIG. 22, and shows a state in which the first group of yarns and the second group of yarns are wound around the fourth godet roller in the yarn running direction of the first group of yarns. [Figure 32] FIG. 23 is a diagram showing a state in which threading work is being performed using a threading unit in the mixed yarn manufacturing apparatus shown in FIG. 22, and shows a state in which the first group of yarns and the second group of yarns are wound around the fifth godet roller in the yarn running direction of the first group of yarns. [Figure 33] FIG. 23 is a diagram showing the state in which threading work is being performed using the threading unit in the mixed yarn manufacturing apparatus shown in FIG. 22, in which the first group of yarns is wound around all of the godet rollers, and the second group of yarns wound around the guide rollers is also wound around some of the godet rollers. DETAILED DESCRIPTION OF THE INVENTION

[0027] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The present invention can be widely applied to various uses as a yarn threading unit used in a mixed yarn manufacturing apparatus that produces a mixed yarn by dividing multiple yarns spun from a spinning apparatus into a first group of yarns and a second group of yarns, drawing at least the first group of yarns, and then doubling the first group of yarns with the second group of yarns.

[0028] (First embodiment) FIG. 1 is a diagram for explaining a mixed yarn production apparatus 1 in which a threading unit 5 (see FIG. 4) according to a first embodiment of the present invention is used, and the mixed yarn production apparatus according to the first embodiment of the present invention, and is a front view of the mixed yarn production apparatus 1 that produces a mixed yarn without heat setting (heat treatment) a partially oriented yarn. FIG. 2 is a front view of the spinning and drawing device 3 in the mixed yarn production apparatus 1 shown in FIG. 1. FIG. 3 is a perspective view of the spinning and drawing device 3 shown in FIG. 2. FIG. 4 is a perspective view of the threading unit 5 according to the first embodiment of the present invention. The threading unit 5 according to the first embodiment of the present invention is used in the mixed yarn production apparatus 1 shown in FIG. 1. The mixed yarn production apparatus according to the first embodiment of the present invention is configured as an apparatus comprising the mixed yarn production apparatus 1 shown in FIG. 1 and the threading unit 5 shown in FIG. 4. For ease of explanation, the up-down direction, front-rear direction, and left-right direction in the mixed yarn production apparatus 1 are defined as shown in FIGS. 1 to 3.

[0029] [Overall configuration of the mixed yarn manufacturing equipment] The mixed yarn manufacturing apparatus 1 divides a plurality of yarns Y, which are synthetic fiber yarns formed by solidifying molten resin continuously spun from a spinning apparatus 2, into a first group of yarns Y1 and a second group of yarns Y2, and applies a drawing process to the first group of yarns Y1 to make the first group of yarns Y1 and the second group of yarns Y2 yarns with different shrinkage rates. Specifically, the mixed yarn manufacturing apparatus 1 applies a drawing process to the first group of yarns Y1 to make them fully drawn yarns (FDY). nThe first group yarn Y1 is drawn as FDY yarn, and the second group yarn Y2 is not drawn as POY yarn, thereby making the first group yarn Y1 and the second group yarn Y2 yarns with different shrinkage rates. The mixed yarn manufacturing apparatus 1 then combines the first group yarn Y1, which is drawn yarn (FDY), with the second group yarn Y2, which is POY yarn, to produce mixed yarn Y3 (BSY: Bi Shrinkage Yarn). Mixed yarn Y3, which is made of two types of yarns Y1 and Y2 with different shrinkage rates, is known to have a good texture. In this specification, when the type of yarn is not particularly limited, it will be simply referred to as yarn Y.

[0030] The mixed yarn manufacturing apparatus 1 comprises a spinning and drawing device 3, a winding device 4, a separating guide 11, yarn sending rollers 12 to 15, and a doubling device 16.

[0031] The separating guide 11 is, for example, a comb-like guide, and is arranged below the spinning device 2. All of the multiple yarns Y spun from the spinning device 2 are separated in half into a first group of yarns Y1 and a second group of yarns Y2 by the separating guide 11. For example, if the number of multiple yarns Y spun from the spinning device 2 is 16, they are separated into eight first group of yarns Y1 and eight second group of yarns Y2, and eight mixed yarns Y3 are finally produced.

[0032] The yarn feed rollers 12 to 15 are driven to rotate by an electric motor (not shown). Front and rear The yarn feed roller 12 is disposed between the fiber separating guide 11 and a later-described heat insulation box 30 in the spinning and drawing device 3 in the yarn running direction of the first group of yarns Y1. The yarn feed rollers 13 to 15 are disposed between the spinning and drawing device 3 and the winding device 4 in the yarn running direction of the yarn Y.

[0033] The first group of yarns Y1 passes through the fiber separating guide 11, then passes through the yarn feed roller 12, and is introduced into the heat insulation box 30 of the spinning and drawing device 3. On the other hand, the second group of yarns Y2 passes through the fiber separating guide 11, then passes through guide rollers 36 and 37 (described below) in the spinning and drawing device 3, and is sent to the yarn feed roller 13.

[0034] The first group yarn Y1 delivered from the insulation box 30 of the spinning and drawing unit 3 and the second group yarn Y2 delivered from the guide roller 37 of the spinning and drawing unit 3 are sent to the spinning device 16 via the yarn feed roller 13 and the yarn feed roller 14. The spinning device 16 is disposed between the yarn feed roller 14 and the yarn feed roller 15 in the yarn running direction of the yarn Y. The spinning device 16 is a device that spins the first group yarn Y1 and the second group yarn Y2 together to produce a mixed yarn Y3. The spinning device 16 is configured as an interlacing device that injects compressed air and spins the first group yarn Y1 and the second group yarn Y2 together by the action of the compressed air. The mixed yarn Y3 produced by spinning the first group yarn Y1 and the second group yarn Y2 together in the spinning device 16 is sent to the winding device 4 via the yarn feed roller 15.

[0035] The winding device 4 has a plurality of fulcrum guides 41, a plurality of traverse devices 42, a contact roller 43, two bobbin holders 44, and a turret 45. The plurality of fulcrum guides 41 and the plurality of traverse devices 42 are arranged side by side in the front-rear direction, and are shown overlapping in the front-rear direction in FIG. 1. The plurality of mixed yarns Y3 fed to the winding device 4 are traversed in the front-rear direction around the plurality of fulcrum guides 41 by the corresponding traverse devices 42. The contact roller 43 is configured to contact the surfaces of the plurality of packages P to apply a predetermined contact pressure and shape the packages P. The plurality of packages P are arranged side by side in the front-rear direction, and are shown overlapping in the front-rear direction in FIG. 1. The bobbin holder 44 extends in the front-rear direction and is configured to allow a plurality of bobbins B to be mounted thereon in a lined-up state in the front-rear direction. The bobbin holder 44 is driven to rotate by an electric motor (not shown). The turret 45 supports the two bobbin holders 44 in a cantilevered manner and is configured to be rotated by an electric motor (not shown). In the winding device 4, the rotation of the turret 45 switches the positions of the two bobbin holders 44 between an upper winding position and a lower standby position.

[0036] The winding device 4 rotates the bobbin holder 44 located at the upper winding position to wind the mixed yarn Y3 onto the bobbins B to form the packages P. When the packages P are completed, the turret 45 is rotated to switch the positions of the two bobbin holders 44. Then, the mixed yarn Y3 is wound onto the bobbins B attached to the bobbin holder 44 that has been newly moved to the winding position.

[0037] [Spinning and drawing equipment] 1 to 3, the spinning and drawing device 3 is configured to include an insulation box 30, a plurality of (five in this embodiment) godet rollers 31 to 35 having heating sources, and a plurality of (two in this embodiment) guide rollers 36 and 37. In Fig. 2, the first group yarn Y1 is shown by a dashed line, the second group yarn Y2 is shown by a dashed two-dot line, and the mixed yarn Y3 is shown by a solid line.

[0038] The plurality of godet rollers 31 to 35 are housed inside the thermal insulation box 30. The plurality of godet rollers 31 to 35 are provided as godet rollers around which a first group of yarns Y1, which is a portion of the plurality of yarns Y spun from the spinning device 2, is wound and which heat and draw the first group of yarns Y1.

[0039] The godet rollers 31 to 35 have a rotation shaft extending in the front-rear direction, and are configured to be rotated in the direction of the arrow shown in Fig. 2 by an electric motor (not shown). The godet rollers 31 to 35 also have a built-in heater (heat source) (not shown) and are configured to heat the yarn Y wound around the circumferential surfaces of the godet rollers 31 to 35. All of the godet rollers 31 to 35 have approximately the same outer diameter.

[0040] Of the five godet rollers 31-35, the three godet rollers 31-33 located upstream in the yarn running direction are provided as preheating rollers for preheating the first group yarn Y1 before drawing. The surface temperature of the godet rollers 31-33 as preheating rollers is set to a temperature (e.g., about 80°C) equal to or higher than the glass transition point of the yarn Y. On the other hand, of the five godet rollers 31-35, the two godet rollers 34 and 35 located downstream in the yarn running direction are provided as heat-setting rollers for heat-setting (heat-treating) the first group yarn Y1. The surface temperature of the godet rollers 34 and 35 as heat-setting rollers is set to a temperature (e.g., about 130-140°C) higher than the surface temperature of the godet rollers 31-33 as preheating rollers.

[0041] The rotation speed (i.e., yarn feeding speed) of the godet rollers 34 and 35 on the downstream side in the yarn traveling direction is set to be faster than the rotation speed (i.e., yarn feeding speed) of the godet rollers 31 to 33 on the upstream side in the yarn traveling direction. As a result, the first group yarn Y1 reaches the godet roller 34 via the godet rollers 31 to 33 and is drawn between the godet rollers 33 and 34.

[0042] Of the three godet rollers 31 to 33 that serve as preheating rollers, the first godet roller 31 in the yarn running direction (i.e., the most upstream godet roller in the yarn running direction) is located below the remaining two godet rollers 32 and 33. The second godet roller 32 in the yarn running direction and the third godet roller 33 in the yarn running direction are located adjacent to each other in the left-right direction. The axis of the second godet roller 32 in the yarn running direction is located to the right of the axis of the most upstream godet roller 31 in the yarn running direction. The axis of the third godet roller 33 in the yarn running direction is located to the left of the axis of the most upstream godet roller 31 in the yarn running direction.

[0043] The two godet rollers 34 and 35, which are heat-setting rollers and the fourth and fifth godet rollers in the yarn running direction, are disposed adjacent to each other in the left-right direction above the godet rollers 31 to 33. The fourth godet roller 34 in the yarn running direction is disposed adjacent to the upper side of the second godet roller 32 in the yarn running direction. The fifth godet roller 35 in the yarn running direction is disposed above the third godet roller 33 in the yarn running direction. The fifth godet roller 35 in the yarn running direction is disposed above the fourth godet roller 34 in the yarn running direction. More specifically, the axis of the fifth godet roller 35 in the yarn running direction is located above the axis of the fourth godet roller 34 in the yarn running direction.

[0044] As described above, the five godet rollers 31 to 35 are arranged compactly and closely packed together in the left-right and up-down directions.

[0045] 3, the heat-retaining box 30 has a box body 38 that is open at the front and that houses the plurality of godet rollers 31 to 35, and a door 39 that opens and closes the box body 38. When the spinning and drawing apparatus 3 is in operation, the door 39 is closed. In the heat-retaining box 30, the door 39 is provided as a hinged door. The door 39 is rotatably attached to a left side wall 38a of the box body 38 via a hinge (not shown).

[0046] As shown in FIGS. 2 and 3 , the box body 38 has an inlet 30a and an outlet 30b formed in its right side wall 38b. The inlet 30a is formed in the lower end of the right side wall 38b of the box body 38 and serves as an entrance opening for introducing the first group of yarns Y1 into the warming box 30. The outlet 30b is formed in the upper end of the right side wall 38b of the box body 38 and serves as an exit opening for discharging the heated and drawn first group of yarns Y1 to the outside. The right side wall 38b of the box body 38 also has a locking groove 38c that engages with a locking claw (not shown) provided on the door 39 when the door 39 is closed. A plurality of locking grooves 38c are provided, and two are provided in this embodiment. The two locking grooves 38c are arranged vertically side by side along the edge of the right side wall 38b of the box body 38. Furthermore, lock groove 38c is provided so as to open at the edge of side wall 38b of box main body 38. Furthermore, lock groove 38c has a step portion on the inside thereof that engages with a lock claw on door 39. When door 39 closes box main body 38, for example, the lock claw of door 39 is inserted into lock groove 38c, and in this state, the lock claw is driven, so that the lock claw engages with the step portion of lock groove 38c.

[0047] The guide rollers 36 and 37 are provided as guide rollers that guide the second group yarn Y2, which is yarn Y2 other than the first group yarn Y1, from the multiple yarns Y. The guide rollers 36 and 37 are arranged adjacent to the right side wall 38a of the box main body 38 outside the thermal insulation box 30. The guide rollers 36 and 37 are arranged vertically side by side, with the guide roller 36 arranged on the lower side and the guide roller 37 arranged on the upper side. The guide roller 36 is provided as a guide roller on the upstream side in the yarn traveling direction of the second group yarn Y2, and the guide roller 37 is provided as a guide roller on the downstream side in the yarn traveling direction of the second group yarn Y2.

[0048] The guide rollers 36, 37 are rotatable rollers having a rotation axis extending in the front-rear direction. The guide rollers 36, 37 are preferably provided as drive rollers that are driven by an electric motor (not shown), but may also be provided as driven rollers that rotate due to friction with the second group yarn Y2. The guide rollers 36, 37 may also be configured to blow air from their surfaces, thereby providing a driven roller that can rotate with reduced friction with the second group yarn Y2 or without contact with the second group yarn Y2. If the guide rollers 36, 37 are drive rollers, the tension of the yarn Y can be adjusted by the rotation speed of the guide rollers 36, 37, making it easier to control the quality of the yarn Y.

[0049] In the spinning and drawing apparatus 3 configured as described above, the first group yarn Y1 passes through the yarn feed roller 12 and is introduced into the thermal insulation box 30 from the inlet 30a. Inside the thermal insulation box 30, the first group yarn Y1 runs while being wound around godet rollers 31 to 33, which are preheating rollers, and godet rollers 34 and 35, which are heat-setting rollers. Specifically, the first group yarn Y1 runs while being wound in a zigzag pattern around the godet roller 31, godet roller 32, godet roller 33, godet roller 34, and godet roller 35 in this order. The first group yarn Y1 is preheated by the godet rollers 31 to 33, which are preheating rollers, to a temperature at which it can be drawn (a temperature equal to or higher than the glass transition point). The preheated first group yarn Y1 becomes a drawn yarn due to the difference in yarn feed speed between the godet roller 33 and the godet roller 34. Furthermore, the first group yarn Y1 is heat-set in a stretched state by the godet rollers 34 and 35. Then, the heat-set second group yarn Y1 is led out of the thermal insulation box 30 through the lead-out port 30b and fed to the yarn feed roller 13.

[0050] On the other hand, the second group yarn Y2 runs while being wound around guide rollers 36 and 37 outside the heat insulation box 30, and is sent to the yarn feed roller 13. Therefore, the second group yarn Y2 does not run between the godet rollers 31 to 35, is not heated and drawn, and is sent to the yarn feed roller 13 as a partially oriented yarn.

[0051] The first group yarn Y1, which is fed to the yarn feed roller 13 through the outlet 30b of the thermal insulation box 30, and the second group yarn Y2, which is fed to the yarn feed roller 13 through guide rollers 36 and 37, meet on the circumferential surface of the yarn feed roller 13, and the corresponding yarns run in an overlapping state. The first group yarn Y1 and the second group yarn Y2, which have passed through the yarn feed roller 13, further pass through a yarn feed roller 14 and reach the spinning device 16. The first group yarn Y1 and the second group yarn Y2 are then spinned by the spinning device 16 to become a mixed yarn Y3. The mixed yarn Y3 passes through a yarn feed roller 15 and is wound by the winding device 4.

[0052] [Threading unit] Fig. 4 is a perspective view showing the threading unit 5 according to the first embodiment of the present invention, and Fig. 5 is a side view of the threading unit 5. Figs. 6 and 7 show the state in which the threading unit 5 is attached to the thermal insulation box 30 of the spinning and drawing device 3 of the mixed yarn production apparatus 1, Fig. 6 being a perspective view and Fig. 7 being a side view. Note that Figs. 6 and 7 show the state in which the door 39 of the thermal insulation box 30 is open. The threading unit 5 will be described below with reference to Figs. 4 to 7.

[0053] The threading unit 5 is used in the mixed yarn manufacturing apparatus 1 that produces the mixed yarn Y3 by doubling the first group of yarns Y1 and the second group of yarns Y2, during the threading operation of winding the second group of yarns Y2 around a guide roller 36 and winding the first group of yarns Y1 around a plurality of godet rollers 31 to 35. The threading unit 5 is configured to include an attachment portion 51 and a threading portion 52.

[0054] The attachment portion 51 is provided in the threading unit 5 as a portion that can be detachably attached to the box body 38 of the thermal insulation box 30. The attachment portion 51 has a base 51a and multiple (two in this embodiment) hook portions 51b. The base 51a is provided as a member that extends in an elongated plate shape. The base 51a is provided so that its longitudinal direction extends linearly. When the attachment portion 51 is attached to the box body 38, the base 51a is arranged in a state that it extends along the edge of the right side wall 38b of the box body 38.

[0055] Each of the two hook portions 51b is provided as a portion that engages with the right side wall 38b of the box body 38 when the mounting portion 51 is attached to the box body 38. Each hook portion 51b is integrally connected to the base portion 51a and protrudes in a cantilevered manner from the base portion 51a in a direction perpendicular to the longitudinal direction of the base portion 51a. The two hook portions 51b protrude in the same direction from the base portion 51a. The two hook portions 51b are provided at positions that correspond to the two lock grooves 38c in the side wall 38b when the mounting portion 51 is arranged along the side wall 38b of the box body 38.

[0056] Each hook portion 51b is provided with an engaging claw 51c that extends and bends like a claw at the tip end protruding from the base portion 51a in a cantilevered manner and engages with the locking groove 38c in the side wall 38b of the box body 38. When the mounting portion 51b is mounted to the box body 38, each hook portion 51b is inserted into the corresponding locking groove 38c formed in the side wall 38b of the box body 38. With each hook portion 51b inserted into the corresponding locking groove 38c, the mounting portion 51 is operated so that the position of the mounting portion 51b is shifted downward, causing the engaging claw 51c on the tip end of each hook portion 51b to engage with a step in the corresponding locking groove 38c. When the engaging claw 51c of the hook portion 51b engages with the step in the locking groove 38c, the mounting portion 51 is attached to the box body 38 and is held by the box body 38. In the present embodiment, the mounting portion 51 is attached to the box main body 38 by engaging the hook portion 51b with the lock groove 38c, but this is not necessarily the case as long as the mounting portion 51 is configured to be detachably attached to the box main body 38. For example, the side wall 38b of the box main body 38 may be provided with a groove other than the lock groove 38c, and the hook portion 51b may engage with the other groove provided in the side wall 38b, thereby allowing the mounting portion 51 to be detachably attached to the box main body 38.

[0057] The yarn hooking portion 52 is provided as a portion on which the second group of yarn Y2 is hooked when the attachment portion 51 is attached to the box body 38, and the second group of yarn Y2 is hooked when a threading operation is performed using the threading unit 5. As shown in Figures 6 and 7, when the attachment portion 51 is attached to the box body 38, the yarn hooking portion 52 is provided so as to extend along an edge portion of the side wall 38b of the box body 38 that is closer to the guide rollers 36, 37 than the godet rollers 31-35 and that is located between the godet rollers 31-35 and the guide rollers 36, 37. Furthermore, when the mounting portion 51 is attached to the box body 38, the yarn hooking portion 52 is arranged so as to extend along the edge of the side wall 38b of the box body 38 at a position that protrudes outward from the box body 38 more than the multiple godet rollers 31 to 35 and more than the end faces of the multiple godet rollers 31 to 35 in the axial direction of the godet rollers 31 to 35.

[0058] Specifically, the thread hooking portion 52 includes a rod-shaped portion 52a and a pair of legs 52b. The rod-shaped portion 52a is provided as a rod-shaped portion extending parallel to the longitudinal direction of the base portion 51a of the mounting portion 51. In this embodiment, the rod-shaped portion 52a is provided as a round rod-shaped portion extending linearly with a circular cross section. When the mounting portion 51 is attached to the box body 38, the rod-shaped portion 52a extends linearly in the vertical direction along an edge of the side wall 38b of the box body 38 that is closer to the guide rollers 36 and 37 than the godet rollers 31 to 35, and along a front edge of the side wall 38a of the box body 38 that is located between the godet rollers 31 to 35 and the guide rollers 36 and 37. In addition, when the mounting portion 51 is attached to the box body 38, the rod-shaped portion 52a is arranged to extend in the vertical direction from a position corresponding to the height position of the upper half of the godet roller 34 to a position corresponding to the height position of the lower half of the godet roller 31.

[0059] The pair of legs 52b of the thread hooking portion 52 are provided as short rod-shaped portions that protrude from the base 51a and support the rod-shaped portion 52a. Each of the pair of legs 52b is provided to protrude from the base 51a in a direction perpendicular to the longitudinal direction of the base 51a toward the side opposite to the side from which the hook portion 51b protrudes. The pair of legs 52b are provided to protrude from both ends of the base 51a, and are provided to protrude from the upper and lower ends of the base 51a when the mounting portion 51 is attached to the box main body 38. Each leg 52b is fixed to the base 51a at one end and integrally connected to the rod-shaped portion 52a at the other end. Furthermore, the other end of one of the pair of legs 52b is integrally joined to one of the ends of the rod-shaped portion 52a, and the other end of the other of the pair of legs 52b is integrally joined to the other of the ends of the rod-shaped portion 52a. Therefore, when the mounting portion 51 is attached to the box main body 38, the leg 52b protrudes forward in the horizontal direction from the edge of the side wall 38b of the box main body 38. When the mounting portion 51 is attached to the box main body 38, the rod-shaped portion 52a is positioned so as to extend in the vertical direction parallel to the edge of the side wall 38b at a position spaced apart from the edge of the side wall 38b of the box main body 38.

[0060] With the above configuration, the rod-shaped portion 52a of the thread hooking portion 52 is configured to extend parallel to the longitudinal direction of the base 51a, at a distance corresponding to the length of the leg 52b from the base 51a of the mounting portion 51. The rod-shaped portion 52a of the thread hooking portion 52 extends linearly at a position spaced apart from the base 51a of the mounting portion 51 by the length of the leg 52b, so that when the mounting portion 51 is attached to the box body 38, the rod-shaped portion 52a extends along the edge of the box body 38 at a position protruding beyond the end faces of the godet rollers 31-35 in the axial direction of the godet rollers 31-35.

[0061] In this embodiment, the threading unit 5 is configured such that the attachment portion 51 and the thread hooking portion 52 are integrally formed, but this is not necessarily the case. The attachment portion 51 and the thread hooking portion 52 may be provided as separate bodies, and the thread hooking portion 52 may be configured to be detachably attached to the attachment portion 51.

[0062] [Threading work using a threading unit] Figures 8 to 14 are diagrams showing the state in which threading work is performed using the threading unit 5 in the mixed yarn production apparatus 1. With reference to Figures 6 to 14, the manner in which threading work is performed using the threading unit 5 in the mixed yarn production apparatus 1 will be described.

[0063] When producing the mixed yarn Y3, first, prior to the production of the mixed yarn Y3, a plurality of yarns Y spun from the spinning device 2 are separated into a first group of yarns Y1 and a second group of yarns Y2, and a threading operation is performed in which the second group of yarns Y2 are wound around the guide roller 36, while the first group of yarns Y1 is wound around the plurality of godet rollers 31-35. When performing the threading operation, as shown in Figures 6 and 7, first, with the door 39 of the thermal insulation box 30 open, a threading unit 5 is attached to the box body 38 of the thermal insulation box 30 at an edge of the box body 38 that is closer to the guide rollers 36 and 37 than the plurality of godet rollers 31-35. At this time, an operator (not shown) performing the threading operation engages the hook portion 51b of the attachment portion 51 with the lock groove 38c in the side wall 38b of the box body 38, and attaches the threading unit 5 to the box body 38. Furthermore, when the threading unit 5 is attached to the box main body 38, the threading portion 52 of the threading unit 5 is positioned so as to extend along the edge of the side wall 38b of the box main body 38 at a position protruding beyond the end faces of the godet rollers 31 to 35 in the axial direction of the godet rollers 31 to 35.

[0064] 8 is a diagram showing a state in which the first group of yarns Y1 is wound around the yarn feed roller 12 outside the thermal insulation box 30, and the second group of yarns Y2 is wound around the guide roller 36. Referring to FIG. 8, after the yarn threading unit 5 is attached to the box body 38, the operator then uses the suction gun 100 to suck in the multiple yarns Y spun from the spinning device 2, and separates the multiple yarns Y into the first group of yarns Y1 and the second group of yarns Y2. The suction gun 100 has a suction port 100a at its tip that sucks in the multiple yarns Y, and is connected to a suction device (not shown).

[0065] When separating the multiple yarns Y into a first group of yarns Y1 and a second group of yarns Y2, the operator first winds the multiple yarns Y sucked into the suction gun 100 around the guide roller 36. Then, the operator holds the suction gun in one hand and a yarn separating tool (not shown) that can hook the yarns at the tip end with the other hand, and separates the multiple yarns being spun into the first group of yarns Y1 and the second group of yarns Y2 using the yarn separating tool held in the other hand. Next, while leaving the second group of yarns Y2 wound around the guide roller 36, the operator operates the yarn separating tool to wind the first group of yarns Y1 around the yarn feed roller 12. Once the second group of yarns Y2 is wound around the guide roller 36 and the first group of yarns Y1 is wound around the yarn feed roller 12, the operator releases the yarn separating tool and holds the suction gun 100 with both hands. Then, while holding the suction gun 100 with both hands, the operator manipulates the position of the suction gun 100 so that the suction port 100a of the suction gun 100 moves between the godet roller 31 and the yarn hooking portion 52 of the yarn hooking unit 5. As a result, as shown in Fig. 8, the first group of yarns Y1 wound around the yarn feed roller 12 passes through the introduction port 30a of the box main body 38, and the second group of yarns Y2 wound around the guide roller 36 passes over the rod-shaped portion 52a of the yarn hooking portion 52 while being hooked on the outer periphery of the rod-shaped portion 52a.

[0066] FIG. 9 shows the state in which the first group of yarns Y1 is wound around the first godet roller 31 in the yarn running direction. When the first group of yarns Y1 passes through the introduction port 30a and the second group of yarns Y2 passes through the guide roller 36 and the yarn hooking portion 52, the operator manipulates the position of the suction gun 100 with the suction port 100a of the suction gun 100 inserted inside the box body 38. At this time, as shown in FIG. 9, the operator manipulates the suction gun 100 with both hands so as to move the suction port 100a clockwise in FIG. 9 along the outer periphery of the godet roller 31. As a result, the first group of yarns Y1 is wound around the godet roller 31 in the yarn running direction of the first group of yarns Y1. Furthermore, when the first group yarn Y1 is wound around the godet roller 31, the second group yarn Y2 is hooked on the yarn hooking portion 52, which extends from the guide roller 36 to the suction port 100a of the suction gun 100 at a position protruding beyond the end surface of the godet roller 31, in the yarn path leading from the guide roller 36 to the suction port 100a of the suction gun 100. Therefore, when the suction gun 100 is operated to wind the first group yarn Y1 around the godet roller 31, the yarn path of the second group yarn Y2 is maintained in a state of bypassing a position protruding beyond the end surface of the godet roller 31. This prevents the second group yarn Y2 from being wound around the godet roller 31 along the same yarn path as the first group yarn Y1 when the first group yarn Y1 is wound around the godet roller 31.

[0067] 10 is a diagram showing a state in which the first group of yarns Y1 is wound around the second godet roller 32 in the yarn traveling direction. When the first group of yarns Y1 has passed through the first godet roller 31 in the yarn traveling direction, the operator further adjusts the position of the suction gun 100 with the suction port 100a of the suction gun 100 inserted inside the box body 38. At this time, as shown in FIG. 10, the operator operates the suction gun 100 with both hands so as to move the suction port 100a counterclockwise in FIG. 10 along the outer periphery of the godet roller 32. As a result, the first group of yarns Y1 is wound around the godet roller 32 in the yarn traveling direction of the first group of yarns Y1. Furthermore, when the first group yarn Y1 is wound around the godet roller 32, the second group yarn Y2 is hooked on the yarn hooking portion 52, which extends from the guide roller 36 to the suction port 100a of the suction gun 100 at a position protruding beyond the end surface of the godet roller 32, in the yarn path leading from the guide roller 36 to the suction port 100a of the suction gun 100. Therefore, when the suction gun 100 is operated to wind the first group yarn Y1 around the godet roller 32, the yarn path of the second group yarn Y2 is maintained in a state of bypassing a position protruding beyond the end surface of the godet roller 32. This prevents the second group yarn Y2 from being wound around the godet roller 32 along the same yarn path as the first group yarn Y1 when the first group yarn Y1 is wound around the godet roller 32.

[0068] 11 is a diagram showing a state in which the first group yarn Y1 is wound around the third godet roller 33 in the yarn traveling direction. When the first group yarn Y1 has passed through the second godet roller 32 in the yarn traveling direction, the operator further adjusts the position of the suction gun 100 with the suction port 100a of the suction gun 100 inserted inside the box body 38. At this time, as shown in FIG. 11, the operator operates the suction gun 100 with both hands so as to move the suction port 100a clockwise in FIG. 11 along the outer periphery of the godet roller 33. As a result, the first group yarn Y1 is wound around the godet roller 33 in the yarn traveling direction of the first group yarn Y1. Furthermore, when the first group yarn Y1 is wound around the godet roller 33, the second group yarn Y2 is hooked on the yarn hooking portion 52, which extends from the guide roller 36 to the suction port 100a of the suction gun 100 at a position protruding beyond the end surface of the godet roller 33, in the yarn path leading from the guide roller 36 to the suction port 100a of the suction gun 100. Therefore, when the suction gun 100 is operated to wind the first group yarn Y1 around the godet roller 33, the yarn path of the second group yarn Y2 is maintained in a state of bypassing a position protruding beyond the end surface of the godet roller 33. This prevents the second group yarn Y2 from being wound around the godet roller 33 along the same yarn path as the first group yarn Y1 when the first group yarn Y1 is wound around the godet roller 33.

[0069] 12 is a diagram showing a state in which the first group yarn Y1 is wound around the fourth godet roller 34 in the yarn traveling direction. When the first group yarn Y1 has passed through the third godet roller 33 in the yarn traveling direction, the operator further adjusts the position of the suction gun 100 with the suction port 100a of the suction gun 100 inserted inside the box body 38. At this time, as shown in FIG. 12, the operator operates the suction gun 100 with both hands so as to move the suction port 100a counterclockwise in FIG. 12 along the outer periphery of the godet roller 34. As a result, the first group yarn Y1 is wound around the godet roller 34 in the yarn traveling direction of the first group yarn Y1. Furthermore, when the first group yarn Y1 is wound around the godet roller 34, the second group yarn Y2 is hooked on the yarn hooking portion 52, which extends from the guide roller 36 to the suction port 100a of the suction gun 100 at a position protruding beyond the end surface of the godet roller 34, in the yarn path leading from the guide roller 36 to the suction port 100a of the suction gun 100. Therefore, when the suction gun 100 is operated to wind the first group yarn Y1 around the godet roller 34, the yarn path of the second group yarn Y2 is maintained in a state of bypassing a position protruding beyond the end surface of the godet roller 34. This prevents the second group yarn Y2 from being wound around the godet roller 34 along the same yarn path as the first group yarn Y1 when the first group yarn Y1 is wound around the godet roller 34.

[0070] 13 is a diagram showing a state in which the first group yarn Y1 is wound around the fifth godet roller 35 in the yarn traveling direction. When the first group yarn Y1 has passed through the fourth godet roller 34 in the yarn traveling direction, the operator further adjusts the position of the suction gun 100 with the suction port 100a of the suction gun 100 inserted inside the box body 38. At this time, as shown in FIG. 13, the operator operates the suction gun 100 with both hands so as to move the suction port 100a clockwise in FIG. 12 along the outer periphery of the godet roller 35. As a result, the first group yarn Y1 is wound around the godet roller 35 in the yarn traveling direction of the first group yarn Y1. Furthermore, when the first group yarn Y1 is wound around the godet roller 35, the second group yarn Y2 is hooked on the yarn hooking portion 52, which extends from the guide roller 36 to the suction port 100a of the suction gun 100 at a position protruding beyond the end surface of the godet roller 35, in the yarn path leading from the guide roller 36 to the suction port 100a of the suction gun 100. Therefore, when the suction gun 100 is operated to wind the first group yarn Y1 around the godet roller 35, the yarn path of the second group yarn Y2 is maintained in a state of bypassing a position protruding beyond the end surface of the godet roller 35. This prevents the second group yarn Y2 from being wound around the godet roller 35 along the same yarn path as the first group yarn Y1 when the first group yarn Y1 is wound around the godet roller 35.

[0071] FIG. 14 shows a state in which the first group of yarns Y1 is wound around all of the godet rollers 31-35 and the second group of yarns Y2 is wound around the guide rollers 36 and 37. When the first group of yarns Y1 has passed through all of the godet rollers 31-35, the operator manipulates the position of the suction gun 100 so that the suction port 100a of the suction gun 100 passes through the outlet 30b, as shown in FIG. 14. This causes the yarn path of the first group of yarns Y1 to pass through the outlet 30b. When the first group of yarns Y1 passes through the outlet 30b and the suction port 100a of the suction gun 100 moves from the outlet 30b to the outside of the box body 38, the second group of yarns Y2 wound around the guide roller 36 is released from the yarn hooking portion 52 of the yarn hooking unit 5. Then, the operator further operates the suction gun 100 with both hands to move the suction port 100a of the suction gun 100 clockwise in Fig. 14 along the outer periphery of the guide roller 37. As a result, the second group of yarns Y2 wound around the guide roller 36 is also wound around the guide roller 37 in the running direction of the second group of yarns Y2. This completes the yarn threading operation in which the multiple yarns Y spun from the spinning device 2 are separated into the first group of yarns Y1 and the second group of yarns Y2, and the second group of yarns Y2 are wound around the guide roller 36 while the first group of yarns Y1 is wound around the multiple godet rollers 31-35. Thereafter, by manipulating the position of the suction gun 100, which is sucking in the first group of yarns Y1 drawn out from the outlet 30b and the second group of yarns Y2 that have passed through the guide roller 37, the first group of yarns Y1 and the second group of yarns Y2 are wound around the yarn feed rollers 13 to 15 and are then taken up by the winding device 4.

[0072] [Action and effect] As described above, according to the first embodiment of the present invention, when threading is performed in the mixed yarn manufacturing apparatus 1 to produce the mixed yarn Y3, the threading unit 5 is first attached to the box body 38 of the thermal insulation box 30 at an edge of the box body 38 that is closer to the guide rollers 36 and 37 than the godet rollers 31 to 35. At this time, the threading portion 52 of the threading unit 5 is positioned so as to extend along the edge of the box body 38 at a position that protrudes beyond the end faces of the godet rollers 31 to 35 in the axial direction of the godet rollers 31 to 35. Then, the threading operation is performed in this state. When the threading operation starts, the operator sucks the multiple yarns Y spun from the spinning device 2 with the suction gun 100 and separates the multiple yarns Y into a first group of yarns Y1 and a second group of yarns Y2. The separated second group of yarns Y2 is wound around the guide roller 36 that is positioned closer to the threading unit 5 than the godet rollers 31 to 35. Then, while holding the suction gun 100, which sucks in the multiple yarns Y, with both hands, the operator operates the position of the suction gun 100 to sequentially wind the first group of yarns Y1 around the multiple godet rollers 31 to 35. At this time, the second group of yarns Y2, which has been wound around the guide roller 36 and sucked into the suction gun, is caught on the yarn hooking portion 52 of the yarn hooking unit 5, which extends along the edge of the box body 38, at a position that protrudes outward from the multiple godet rollers 31 to 35 and protrudes further than the end faces of the godet rollers 31 to 35 in the axial direction of the godet rollers 31 to 35, in the yarn path leading from the guide roller 36 to the suction port 100a of the suction gun 100. Therefore, when the operator holds the suction gun 100 with both hands and operates it to sequentially wind the first group of yarns Y1 around the plurality of godet rollers 31 to 35, the second group of yarns Y2 remains hooked on the yarn hooking portion 52 of the yarn hooking unit 5.As a result, throughout the operation of winding the first group yarn Y1 around the godet rollers 31-35, the yarn path of the second group yarn Y2 is maintained in a state where a part of the yarn path of the second group yarn Y2 located between the guide roller 36 and the suction gun 100 protrudes further outward from the box body 38 than the godet rollers 31-35 and bypasses positions protruding further axially than the end faces of the godet rollers 31-35. This prevents the second group yarn Y2 from being wound around the godet rollers 31-35 along the same yarn path as the first group yarn Y1. Therefore, the operator can easily perform the threading operation of sequentially winding the first group of yarns Y1 around the plurality of godet rollers 31-35 while operating the heavy suction gun 100 with both hands and keeping the yarn path of the first group of yarns Y1 and the yarn path of the second group of yarns Y2 separate. Furthermore, since the threading operation can be easily performed, the time required for the threading operation can be significantly reduced. Furthermore, the significant reduction in the time required for the threading operation reduces the amount of yarn sucked into the suction gun 100 during the operation, significantly reducing the amount of lint generated.

[0073] Therefore, according to the first embodiment of the present invention, it is possible to provide a yarn threading unit 5 and a mixed yarn manufacturing apparatus equipped with the yarn threading unit 5, which allow the yarn threading operation of sequentially winding the first group of yarn Y1 around a plurality of godet rollers 31 to 35 while operating the suction gun 100 with both hands, thereby significantly shortening the time required for the yarn threading operation and reducing the amount of yarn sucked into the suction gun 100 and thereby significantly reducing the amount of yarn waste generated.

[0074] Furthermore, according to the first embodiment of the present invention, the threading unit 5 can be easily configured with a simple structure including the threading portion 52 having the linearly extending rod portion 52a and the attachment portion 51 to the box main body 38. That is, the threading unit 5 can be easily configured with a simple structure, allowing the user to operate the suction gun 100 with both hands and easily perform the threading operation of winding the first group of yarns Y1 around the plurality of godet rollers 31-35 while maintaining separate yarn paths for the first group of yarns Y1 and the second group of yarns Y2.

[0075] (First Modification) Next, a first modified example of the first embodiment of the present invention will be described. Fig. 15 is a perspective view of the threading unit 6 according to the first modified example. Fig. 16 is a side view of the threading unit 6. Fig. 17 is a perspective view showing the threading unit 6 attached to the thermal insulation box 30 of the spinning and drawing device 3 of the mixed yarn production apparatus 1. The threading unit 6 according to the first modified example is used in the mixed yarn production apparatus 1 shown in Fig. 1. The mixed yarn production apparatus according to the first modified example is configured as an apparatus including the mixed yarn production apparatus 1 shown in Fig. 1 and the threading unit 6 shown in Figs. 15 and 16. In the description of the first modified example, the configuration of the threading unit 6 that is different from that of the first embodiment will be described, and the same configuration as in the first embodiment will be denoted by the same reference numerals in the drawings or by referring to the same reference numerals, and redundant description will be omitted.

[0076] The threading unit 6 is configured to include an attachment portion 61 and a thread hooking portion 62. The attachment portion 61 is provided as a portion of the threading unit 6 that can be detachably attached to the box body 38 of the thermal insulation box 30. The attachment portion 61 has a base portion 61a and multiple (two in this embodiment) hook portions 61b. The base portion 61a is provided as a portion that extends in an elongated plate shape. The base portion 61a is provided so that its longitudinal direction extends linearly. When the attachment portion 61 is attached to the box body 38, the base portion 61a is positioned in a state that it extends along the edge of the right side wall 38b of the box body 38.

[0077] Each of the two hook portions 61b is provided as a portion that engages with the right side wall 38b of the box body 38 when the attachment portion 61 is attached to the box body 38. The hook portion 61b has a configuration similar to the hook portion 51b of the threading unit 5 of the first embodiment. The hook portion 61b is provided integrally with the base portion 61a and protrudes from the base portion 61a in a direction perpendicular to the longitudinal direction of the base portion 61a. An engagement pawl 61c that extends in a bent, claw-like shape and engages with the lock groove 38c in the side wall 38b of the box body 38 is provided at the tip of the hook portion 61b. When the attachment portion 61 is attached to the box body 38, each hook portion 61b is inserted into the corresponding lock groove 38c of the box body 38, and the attachment portion 61 is positioned such that the engagement pawl 61c of each hook portion 61b engages with a step in the corresponding lock groove 38c. When the engaging claw 61c of the hook portion 61b engages with the locking groove 38c, the mounting portion 61 is attached to the box main body 38 and is held by the box main body 38. Note that, in this modified example, the mounting portion 61 is attached to the box main body 38 when the hook portion 61b engages with the locking groove 38c, but this is not necessarily the case as long as the mounting portion 61 is configured to be detachably attached to the box main body 38. For example, the side wall 38b of the box main body 38 may be provided with another groove different from the locking groove 38c, and the hook portion 61b may engage with the other groove provided in the side wall 38b, so that the mounting portion 61 is detachably attached to the box main body 38.

[0078] The yarn hooking portion 62 is provided as a portion on which the second group of yarn Y2 is hooked when the attachment portion 61 is attached to the box body 38, and the second group of yarn Y2 is hooked when a threading operation is performed using the threading unit 6. As shown in Fig. 17, when the attachment portion 61 is attached to the box body 38, the yarn hooking portion 62 is provided so as to extend along an edge portion of the side wall 38b of the box body 38 that is closer to the guide rollers 36, 37 than the godet rollers 31-35 and that is located between the godet rollers 31-35 and the guide rollers 36, 37. Furthermore, when the mounting portion 61 is attached to the box body 38, the thread hooking portion 62 is arranged so as to extend along the edge of the side wall 38b of the box body 38 at a position that protrudes outward from the box body 38 more than the multiple godet rollers 31 to 35 and more than the end faces of the multiple godet rollers 31 to 35 in the axial direction of the godet rollers 31 to 35.

[0079] Specifically, the thread hooking portion 62 includes flat plate portions 62a and 62b formed by bending a plate-like member integral with the base portion 61a of the attachment portion 61. The flat plate portions 62a and 62b are provided as flat plate portions extending parallel to the longitudinal direction of the base portion 61a. One of both longitudinally extending edges of the flat plate portion 62a is integrally joined to the base portion 61a. The other longitudinally extending edge of the flat plate portion 62a is integrally joined to the flat plate portion 62b. The base portion 61a, the flat plate portions 62a, and the flat plate portions 62b are integrally formed so as to form an isosceles triangular cross section in a cross section perpendicular to the longitudinal direction of the base portion 61a and the thread hooking portion 62, with the base portion 61a as the base and the flat plate portions 62a and 62b as the isosceles triangles. The thread hooking portion 62, which is configured to include the flat plate portion 62a and the flat plate portion 62b, is formed, for example, by bending a plate-shaped member that is the material for the base portion 61a and the thread hooking portion 62 into a triangular prism shape.

[0080] Furthermore, when the mounting portion 61 is attached to the box body 38, both the flat plate portions 62a and 62b are configured to extend in a flat plate shape in the vertical direction along an edge of the side wall 38b of the box body 38 that is closer to the guide rollers 36 and 37 than the godet rollers 31 to 35, and along a front edge of the side wall 38a of the box body 38 that is positioned between the godet rollers 31 to 35 and the guide rollers 36 and 37. When the mounting portion 61 is attached to the box body 38, both the flat plate portions 62a and 62b are provided to extend in the vertical direction from a position corresponding to the height position of the upper half of the godet roller 34 to a position corresponding to the height position of the lower half of the godet roller 31.

[0081] The thread hooking portion 62, which is configured with integrally formed flat plate portions 62a and 62b, has a top portion 62c that is provided as a joint between the flat plate portions 62a and 62b. When a threading operation is performed using the threading unit 6 with the attachment portion 61 attached to the box main body 38, the second group of thread Y2 is hooked on the thread hooking portion 62 at the top portion 62c. In a cross section perpendicular to the longitudinal direction of the base portion 61a and the thread hooking portion 62, the top portion 62c of the thread hooking portion 62 forms the vertex of an isosceles triangle with the base portion 61a as the base and the flat plate portions 62a and 62b as the isosceles sides. The top portion 62c is located on the opposite side of the base portion 61a from the hook portion 61b. When the mounting portion 61 is attached to the box body 38, the top 62c is positioned to extend vertically parallel to the edge of the side wall 38b of the box body 38 at a position spaced apart from the edge. Therefore, the thread hooking portion 62 is configured to extend parallel to the longitudinal direction of the base 51a at the top 62c, spaced apart by a distance corresponding to the height of an isosceles triangle whose isosceles sides are the flat plate portions 62a and 62b. The top 62c of the thread hooking portion 62 extends linearly at a position spaced apart from the base 51a of the mounting portion 51, and therefore, when the mounting portion 51 is attached to the box body 38, the top 62c of the thread hooking portion 62 is configured to extend along the edge of the box body 38 at a position protruding beyond the end faces of the godet rollers 31-35 in the axial direction of the godet rollers 31-35.

[0082] When threading is performed using the above-described threading unit 6, the threading unit 6 is used in the same manner as the threading unit 5. When threading is performed, the threading unit 6 is first attached to the box body 38 of the thermal insulation box 30. At this time, the top 62c of the threading portion 62 of the threading unit 6 is positioned so as to extend along the edge of the side wall 38b of the box body 38, protruding beyond the end faces of the godet rollers 31-35 in the axial direction of the godet rollers 31-35. Then, the threading is performed in this state. When threading begins, an operator uses the suction gun 100 to suck the multiple yarns Y spun from the spinning device 2 and separates the multiple yarns Y into a first group of yarns Y1 and a second group of yarns Y2. The separated second group of yarns Y2 is wound around a guide roller 36 located on the threading unit 6 side relative to the multiple godet rollers 31-35. Then, while holding the suction gun 100, which sucks in the multiple yarns Y, with both hands, the operator operates the position of the suction gun 100 to sequentially wind the first group of yarns Y1 around the multiple godet rollers 31 to 35. At this time, the second group of yarns Y2, which has been wound around the guide roller 36 and sucked into the suction gun, is hooked on the yarn hooking portion 62 of the yarn hooking unit 6, which extends along the edge of the box body 38, at a position that protrudes outward from the multiple godet rollers 31 to 35 and protrudes further than the end faces of the godet rollers 31 to 35 in the axial direction of the godet rollers 31 to 35, in the yarn path leading from the guide roller 36 to the suction port 100a of the suction gun 100. Therefore, when the operator holds the suction gun 100 with both hands and operates it to sequentially wind the first group of yarns Y1 around the plurality of godet rollers 31 to 35, the second group of yarns Y2 remains hooked on the yarn hooking portion 62 of the yarn hooking unit 6.As a result, throughout the operation of winding the first group yarn Y1 around the godet rollers 31-35, the yarn path of the second group yarn Y2 is maintained in a state where a part of the yarn path of the second group yarn Y2 located between the guide roller 36 and the suction gun 100 protrudes further outward from the box body 38 than the godet rollers 31-35 and bypasses positions protruding further axially than the end faces of the godet rollers 31-35. This prevents the second group yarn Y2 from being wound around the godet rollers 31-35 along the same yarn path as the first group yarn Y1. Therefore, the operator can easily perform the threading operation of sequentially winding the first group of yarns Y1 around the plurality of godet rollers 31-35 while operating the heavy suction gun 100 with both hands and keeping the yarn path of the first group of yarns Y1 and the yarn path of the second group of yarns Y2 separate. Furthermore, since the threading operation can be easily performed, the time required for the threading operation can be significantly reduced. Furthermore, the significant reduction in the time required for the threading operation reduces the amount of yarn sucked into the suction gun 100 during the operation, significantly reducing the amount of lint generated.

[0083] Therefore, according to the first variant, it is possible to easily perform the threading work of sequentially winding the first group of yarn Y1 around the plurality of godet rollers 31 to 35 while operating the suction gun 100 with both hands, thereby significantly shortening the time required for the threading work and reducing the amount of yarn sucked into the suction gun 100, thereby significantly reducing the amount of yarn waste generated, and it is possible to provide a threading unit 6 and a mixed yarn manufacturing apparatus equipped with the threading unit 6.

[0084] Furthermore, according to the first modified example, the threading unit 6 can be easily configured with a simple structure including the threading portion 62 having the linearly extending flat plate portions 62a and 62b and the attachment portion 61 to the box body 38. In other words, the threading unit 6 can be easily configured with a simple structure, allowing the user to operate the suction gun 100 with both hands and easily perform the threading operation of winding the first group of yarns Y1 around the plurality of godet rollers 31-35 while maintaining separate yarn paths for the first group of yarns Y1 and the second group of yarns Y2.

[0085] [Second Modification] Next, a second modified example of the first embodiment of the present invention will be described. Fig. 18 is a perspective view of the threading unit 7 according to the second modified example. Fig. 19 is a side view of the threading unit 7. Fig. 20 is a perspective view showing the threading unit 7 attached to the thermal insulation box 30 of the spinning and drawing device 3 of the mixed yarn production apparatus 1. The threading unit 7 according to the second modified example is used in the mixed yarn production apparatus 1 shown in Fig. 1. The mixed yarn production apparatus according to the second modified example is configured as an apparatus including the mixed yarn production apparatus 1 shown in Fig. 1 and the threading unit 7 shown in Figs. 18 and 19. In the description of the second modified example, only the configuration of the threading unit 7 that is different from that of the first embodiment will be described, and the same configuration as that of the first embodiment will be denoted by the same reference numerals in the drawings or by referring to the same reference numerals, and redundant description will be omitted.

[0086] The threading unit 7 is configured to include an attachment portion 71 and a thread hooking portion 72. The attachment portion 71 is provided as a portion of the threading unit 7 that can be detachably attached to the box body 38 of the thermal insulation box 30. The attachment portion 71 has a base portion 71a and multiple (two in this embodiment) hook portions 71b. The base portion 71a is provided as a portion that extends in an elongated plate shape. The base portion 71a is provided so that its longitudinal direction extends linearly. When the attachment portion 71 is attached to the box body 38, the base portion 71a is positioned in a state that it extends along the edge of the right side wall 38b of the box body 38.

[0087] Each of the two hook portions 71b is provided as a portion that engages with the right side wall 38b of the box body 38 when the attachment portion 71 is attached to the box body 38. The hook portion 71b has a configuration similar to the hook portion 51b of the threading unit 5 of the first embodiment. The hook portion 71b is provided integrally with the base portion 71a and protrudes from the base portion 71a in a direction perpendicular to the longitudinal direction of the base portion 71a. The tip of the hook portion 71b is provided with an engagement pawl 71c that extends in a bent, claw-like shape and engages with the lock groove 38c in the side wall 38b of the box body 38. When the attachment portion 71 is attached to the box body 38, each hook portion 71b is inserted into the corresponding lock groove 38c of the box body 38, and the attachment portion 71 is positioned so that the engagement pawl 71c of each hook portion 71b engages with a step in the corresponding lock groove 38c. When the engaging claw 71c of the hook portion 71b engages with the locking groove 38c, the mounting portion 71 is attached to the box main body 38 and is held by the box main body 38. Note that, in this modified example, the mounting portion 71 is attached to the box main body 38 by the hook portion 71b engaging with the locking groove 38c, but this is not necessarily the case as long as the mounting portion 71 is configured to be detachably attached to the box main body 38. For example, the side wall 38b of the box main body 38 may be provided with another groove different from the locking groove 38c, and the hook portion 71b may engage with the other groove provided in the side wall 38b, so that the mounting portion 71 is detachably attached to the box main body 38.

[0088] The yarn hooking portion 72 is provided as a portion on which the second group of yarn Y2 is hooked when the attachment portion 71 is attached to the box body 38, and the second group of yarn Y2 is hooked when a threading operation is performed using the threading unit 7. As shown in Fig. 20, when the attachment portion 71 is attached to the box body 38, the yarn hooking portion 72 is provided so as to extend along an edge portion of the side wall 38b of the box body 38 that is closer to the guide rollers 36, 37 than the godet rollers 31-35 and that is located between the godet rollers 31-35 and the guide rollers 36, 37. Furthermore, when the mounting portion 71 is attached to the box body 38, the thread hooking portion 72 is arranged to extend along the edge of the side wall 38b of the box body 38 at a position that protrudes outward from the box body 38 more than the multiple godet rollers 31 to 35 and more than the end faces of the multiple godet rollers 31 to 35 in the axial direction of the godet rollers 31 to 35.

[0089] Specifically, the thread hooking portion 72 includes a flat plate portion 72a formed by bending a plate-like member integral with the base portion 71a of the attachment portion 71. The flat plate portion 72a is provided as a flat plate-like portion extending parallel to the longitudinal direction of the base portion 71a. One of both longitudinally extending edges of the flat plate portion 72a is integrally joined to the base portion 71a. The base portion 71a and the flat plate portion 72a are integrally formed such that, in a cross section perpendicular to the longitudinal direction of the base portion 71a and the flat plate portion 72a, a portion of the base portion 71a and a portion of the flat plate portion 72a form an L-shaped cross section perpendicular to the longitudinal direction of the base portion 71a and the flat plate portion 72a. The thread hooking portion 72 including the flat plate portion 72a is formed, for example, by bending a plate-like member that is the material for the base portion 71a and the thread hooking portion 72 to form an L-shaped cross section.

[0090] Furthermore, when the mounting portion 71 is attached to the box body 38, the flat plate portion 72a is configured to extend in a flat plate shape in the vertical direction along the front edge of the side wall 38a of the box body 38 on the guide roller 36, 37 side of the godet rollers 31 to 35, between the godet rollers 31 to 35 and the guide rollers 36, 37. When the mounting portion 71 is attached to the box body 38, the flat plate portion 72a is provided to extend in the vertical direction from a position corresponding to the height position of the upper half of the godet roller 34 to a position corresponding to the height position of the lower half of the godet roller 31.

[0091] The thread hooking portion 72, which includes a flat plate portion 72a integrally joined to the base portion 71a, has an edge portion 72b extending along the longitudinal direction of the thread hooking portion 72 at an end of the flat plate portion 72a opposite to the end integrally joined to the base portion 71a. When a threading operation is performed using the threading unit 7 with the attachment portion 71 attached to the box main body 38, the second group of thread Y2 is hooked on the edge portion 72b to the thread hooking portion 72. The edge portion 72b is located on the opposite side of the hook portion 71b with respect to the base 71a. When the attachment portion 71 is attached to the box main body 38, the edge portion 72b is located so as to extend in the up-down direction parallel to the edge portion of the side wall 38b of the box main body 38 at a position spaced apart from the edge portion of the side wall 38b. Therefore, the thread hooking portion 72 is configured to extend parallel to the longitudinal direction of the base 71a at the edge 72b, with the edge 72b spaced a distance corresponding to the amount of protrusion of the flat plate portion 72a, which protrudes in an L-shape relative to the base 71a. The edge 72b of the thread hooking portion 72 extends linearly at a position spaced from the base 71a of the mounting portion 71, so that when the mounting portion 71 is attached to the box body 38, the edge 72b extends along the edge of the box body 38 at a position protruding beyond the end faces of the godet rollers 31-35 in the axial direction of the godet rollers 31-35.

[0092] When threading is performed using the above-described threading unit 7, the threading unit 7 is used in the same manner as the threading unit 5. When threading is performed, the threading unit 7 is first attached to the box body 38 of the thermal insulation box 30. At this time, the edge 72b of the threading portion 72 of the threading unit 7 is positioned so as to extend along the edge of the side wall 38b of the box body 38, protruding beyond the end faces of the godet rollers 31-35 in the axial direction of the godet rollers 31-35. Then, threading is performed in this state. When threading begins, an operator uses the suction gun 100 to suck in the multiple yarns Y spun from the spinning device 2 and separates the multiple yarns Y into a first group of yarns Y1 and a second group of yarns Y2. The separated second group of yarns Y2 is wound around a guide roller 36 located on the threading unit 7 side relative to the multiple godet rollers 31-35. Then, while holding the suction gun 100, which sucks in the multiple yarns Y, with both hands, the operator operates the position of the suction gun 100 to sequentially wind the first group of yarns Y1 around the multiple godet rollers 31-35. At this time, the second group of yarns Y2, which has been wound around the guide roller 36 and sucked into the suction gun, is hooked on the yarn hooking portion 72 of the yarn hooking unit 7, which extends along the edge of the box body 38, at a position that protrudes outward from the multiple godet rollers 31-35 in the axial direction of the godet rollers 31-35 and protrudes beyond the end faces of the godet rollers 31-35, in the yarn path leading from the guide roller 36 to the suction port 100a of the suction gun 100. Therefore, when the operator holds the suction gun 100 with both hands and operates it to sequentially wind the first group of yarns Y1 around the plurality of godet rollers 31 to 35, the second group of yarns Y2 remains hooked on the yarn hooking portion 72 of the yarn hooking unit 7.As a result, throughout the operation of winding the first group yarn Y1 around the godet rollers 31-35, the yarn path of the second group yarn Y2 is maintained in a state where a part of the yarn path of the second group yarn Y2 located between the guide roller 36 and the suction gun 100 protrudes further outward from the box body 38 than the godet rollers 31-35 and bypasses positions protruding further axially than the end faces of the godet rollers 31-35. This prevents the second group yarn Y2 from being wound around the godet rollers 31-35 along the same yarn path as the first group yarn Y1. Therefore, the operator can easily perform the threading operation of sequentially winding the first group of yarns Y1 around the plurality of godet rollers 31-35 while operating the heavy suction gun 100 with both hands and keeping the yarn path of the first group of yarns Y1 and the yarn path of the second group of yarns Y2 separate. Furthermore, since the threading operation can be easily performed, the time required for the threading operation can be significantly reduced. Furthermore, the significant reduction in the time required for the threading operation reduces the amount of yarn sucked into the suction gun 100 during the operation, significantly reducing the amount of lint generated.

[0093] Therefore, according to the second variant, it is possible to provide a yarn threading unit 7 and a mixed yarn manufacturing apparatus equipped with the yarn threading unit 7, which allows the user to easily perform the threading work of sequentially winding the first group of yarn Y1 around multiple godet rollers 31 to 35 while operating the suction gun 100 with both hands, thereby significantly shortening the time required for the threading work and reducing the amount of yarn sucked into the suction gun 100 to significantly reduce the amount of yarn waste generated.

[0094] Furthermore, according to the second modified example, the threading unit 7 can be easily configured with a simple structure that includes the threading portion 72 having the linearly extending flat portion 72a and the attachment portion 71 to the box body 38. In other words, the threading unit 7 can be easily configured with a simple structure that allows the user to operate the suction gun 100 with both hands and easily perform the threading operation of winding the first group of yarns Y1 around the plurality of godet rollers 31-35 while maintaining separate yarn paths for the first group of yarns Y1 and the second group of yarns Y2.

[0095] [Third Modification] Next, a third modified example of the first embodiment of the present invention will be described. Fig. 21 is a perspective view showing a state in which a threading unit 8 according to the third modified example is attached to the thermal insulation box 30 of the spinning and drawing device 3 of the mixed yarn production apparatus 1. The threading unit 7 according to the third modified example is used in the mixed yarn production apparatus 1 shown in Fig. 1. The mixed yarn production apparatus according to the third modified example is configured as an apparatus including the mixed yarn production apparatus 1 shown in Fig. 1 and the threading unit 8 shown in Fig. 21. In the description of the third modified example, the configuration of the threading unit 8 that is different from that of the first embodiment will be described, and duplicate explanations will be omitted for configurations that are similar to those of the first embodiment by assigning the same reference numerals in the drawings or by quoting the same reference numerals.

[0096] The threading unit 8 is provided as a flat plate-like member attached to the box body 38 of the insulated box 30, and is configured with an attachment portion 81 and a threading portion 82. The attachment portion 81 is provided as a portion of the threading unit 8, which is provided as a flat plate-like member, that is attached and fixed to the right side wall 38a of the box body 38 of the insulated box 30. The attachment portion 81 is fixedly attached to the side wall 38a of the box body 38 on the outside of the side wall 38a, overlapping the surface of the side wall 38a. The attachment portion 81 is fixedly attached to the box body 38 by, for example, coupling to the side wall 38a with a fastening device such as a bolt, or by welding to the side wall 38a.

[0097] The thread hooking portion 82 is integral with the mounting portion 81 and is provided as a portion that protrudes forward from the mounting portion 81 attached to the side wall 38a of the box body 38 of the threading unit 8, which is provided as a flat member. The thread hooking portion 82 is provided as a portion around which the second group of yarn Y2 is hooked when a threading operation is performed using the threading unit 8. As shown in FIG. 21 , the thread hooking portion 82 is provided so as to extend in a flat plate-like shape in the vertical direction along an edge of the side wall 38b of the box body 38 that is closer to the guide rollers 36 and 37 than the godet rollers 31 to 35, and that is located between the godet rollers 31 to 35 and the guide rollers 36 and 37. The thread hooking portion 82 is provided so as to extend in the vertical direction from a position corresponding to the height position of the upper half of the godet roller 34 to a position corresponding to the height position of the lower half of the godet roller 31. Furthermore, the yarn hooking portion 82 is provided at a position protruding outward from the box body 38 more than the plurality of godet rollers 31-35 and more than the end faces of the plurality of godet rollers 31-35 in the axial direction of the godet rollers 31-35, and is arranged to extend along the edge of the side wall 38b of the box body 38.

[0098] The thread hooking portion 82, which is integral with the mounting portion 81, has an edge 82a extending along the longitudinal direction of the thread hooking portion 82 at an end opposite to the end integral with the mounting portion 81. When threading is performed using the threading unit 8, the second group of thread Y2 is hooked on the edge 82a. The thread hooking portion 82 protrudes forward beyond the edge of the side wall 38b of the box main body 38, and the edge 82a of the thread hooking portion 82 is positioned to extend in the up-down direction parallel to the edge of the side wall 38b at a position protruding forward beyond the edge of the side wall 38b of the box main body 38. Furthermore, the edge 82b of the thread hooking portion 82 is configured to extend along the edge of the box main body 38 at a position protruding beyond the end faces of the godet rollers 31-35 in the axial direction of the godet rollers 31-35.

[0099] The threading unit 8 is permanently attached to the box body 38 of the thermal insulation box 30. When threading is performed using the threading unit 8, the threading unit 8 is used while still attached to the box body 38. When threading is performed, the operator uses the suction gun 100 to suck in the multiple yarns Y spun from the spinning device 2 and separates the multiple yarns Y into a first group of yarns Y1 and a second group of yarns Y2. The separated second group of yarns Y2 is wound around a guide roller 36 that is positioned closer to the threading unit 8 than the multiple godet rollers 31 to 35. Then, while holding the suction gun 100 that sucks in the multiple yarns Y with both hands, the operator operates the position of the suction gun 100 to sequentially wind the first group of yarns Y1 around the multiple godet rollers 31 to 35. At this time, the second group of yarn Y2, which has been wound around the guide roller 36 and sucked into the suction gun, is caught on the yarn hooking portion 82 of the yarn hooking unit 8, which extends along the edge of the box body 38 at a position that protrudes further outward from the godet rollers 31-35 in the yarn path leading from the guide roller 36 to the suction port 100a of the suction gun 100 and that protrudes further axially than the end faces of the godet rollers 31-35. Therefore, when the operator holds the suction gun 100 with both hands and operates it to sequentially wind the first group of yarn Y1 around the godet rollers 31-35, the second group of yarn Y2 remains hooked on the yarn hooking portion 82 of the yarn hooking unit 8. As a result, throughout the operation of winding the first group yarn Y1 around the godet rollers 31 to 35, the yarn path of the second group yarn Y2 is maintained at a position between the guide roller 36 and the suction gun 100 that protrudes further outward from the box body 38 than the godet rollers 31 to 35 and that detours around positions that protrude further axially than the end faces of the godet rollers 31 to 35. This prevents the second group yarn Y2 from being wound around the godet rollers 31 to 35 along the same yarn path as the first group yarn Y1.Therefore, the operator can easily perform the threading operation of sequentially winding the first group of yarns Y1 around the plurality of godet rollers 31-35 while operating the heavy suction gun 100 with both hands and keeping the yarn path of the first group of yarns Y1 and the yarn path of the second group of yarns Y2 separate. Furthermore, since the threading operation can be easily performed, the time required for the threading operation can be significantly reduced. Furthermore, the significant reduction in the time required for the threading operation reduces the amount of yarn sucked into the suction gun 100 during the operation, significantly reducing the amount of lint generated.

[0100] Therefore, according to the third variant, it is possible to provide a yarn threading unit 8 and a mixed yarn manufacturing apparatus equipped with the yarn threading unit 8, which allows the yarn threading operation of sequentially winding the first group of yarn Y1 around the plurality of godet rollers 31 to 35 while operating the suction gun 100 with both hands, thereby significantly shortening the time required for the yarn threading operation and reducing the amount of yarn sucked into the suction gun 100 to significantly reduce the amount of yarn waste generated.

[0101] (Second embodiment) Next, a second embodiment of the present invention will be described. Fig. 22 is a diagram for explaining a mixed yarn production apparatus 1A using a threading unit 5A (see Fig. 25) according to a second embodiment of the present invention, and the mixed yarn production apparatus according to the second embodiment of the present invention, and is a front view of the mixed yarn production apparatus 1A that produces a mixed yarn by heat-setting (heat treatment) a partially oriented yarn. Fig. 23 is a front view of a spinning and drawing unit 3A in the mixed yarn production apparatus 1A shown in Fig. 22. Fig. 24 is a perspective view of the spinning and drawing unit 3A shown in Fig. 23. Fig. 25 is a perspective view of a threading unit 5A according to the second embodiment of the present invention. In the description of the second embodiment, only the configurations of the spinning and drawing unit 3A and the threading unit 5A that are different from those of the first embodiment will be described, and the same components as those in the first embodiment will be denoted by the same reference numerals in the drawings or by using the same reference numerals, and redundant description will be omitted.

[0102] [Spinning and drawing equipment] 22 to 25, the spinning and drawing apparatus 3A is configured to include an insulation box 30A, a plurality of godet rollers 31 to 35 (five in the second embodiment) each having a heat source, a guide roller 36A, and a doubling assisting device 17. The spinning and drawing apparatus 3A is configured similarly to the spinning and drawing apparatus 3 of the first embodiment, but differs from the first embodiment in that the second group yarn Y2 is heat-set by the godet rollers 34 and 35 while it is in a partially oriented yarn state. In Fig. 23, the first group yarn Y1 is shown by a dashed line, the second group yarn Y2 is shown by a dashed double-dashed line, and the mixed yarn Y3 is shown by a solid line.

[0103] 22 to 24, the thermal insulation box 30A of the spinning and drawing apparatus 3A is configured similarly to the thermal insulation box 30 of the spinning and drawing apparatus 3 of the first embodiment, and includes a box main body 38 that houses multiple godet rollers 31 to 35 and a door 39 for opening and closing the box main body 38. However, the thermal insulation box 30A differs from the thermal insulation box 30 of the first embodiment in that the box main body 38 is provided with an inlet 30c for introducing the second group of yarns Y2 into the interior, in addition to an inlet 30a for introducing the first group of yarns Y1 into the interior. The inlet 30c is formed in the upper half of the right side wall 38b of the box main body 38, is located between the inlet 30a and the outlet 30b, and serves as an inlet for the second group of yarns Y2. A guide roller 36A is disposed at the inlet 30c.

[0104] The guide roller 36A is provided as a guide roller that guides the second group of yarns Y2 that are separated as yarns Y2 other than the first group of yarns Y1 from the multiple yarns Y. Note that, in the spinning and drawing apparatus 3 of the first embodiment, two guide rollers 36 and 37 that guide the second group of yarns Y2 are provided, but in the spinning and drawing apparatus 3A of the second embodiment, one guide roller 36A is provided.

[0105] The guide roller 36A is provided as a rotatable roller having a rotation axis extending in the front-rear direction. The guide roller 36A is disposed on a side wall 38b of the thermal insulation box 30A that is spaced apart from the plurality of godet rollers 31 to 33. More specifically, the guide roller 36A is disposed at an inlet 30c provided on the side wall 38b. The guide roller 36A has an outer diameter larger than the thickness of the side wall 38b of the box body 38 of the thermal insulation box 30A. Therefore, the guide roller 36A is disposed so as to protrude from the side wall 38b of the box body 38 of the thermal insulation box 30A to both the outside and inside of the thermal insulation box 30A when viewed in the axial direction. The guide roller 36A is preferably provided as a drive roller that is rotationally driven by an electric motor (not shown), but may also be provided as a driven roller that rotates due to friction with the second group of yarns Y2.

[0106] Unlike the spinning and drawing apparatus 3 of the first embodiment, the spinning and drawing apparatus 3A is provided with a doubling auxiliary device 17. The doubling auxiliary device 17 is disposed inside the thermal insulation box 30A, and is disposed between the position where the yarn Y separates from the godet roller 35, which is most downstream in the yarn running direction, and the position where the yarn Y is led out of the thermal insulation box 30A. Like the doubling device 16, the doubling auxiliary device 17 is an interlacing device that injects compressed air and doubling the first group of yarns Y1 and the second group of yarns Y2 by the action of the compressed air. However, the doubling auxiliary device 17 is set to inject compressed air at a lower pressure than the doubling device 16. Therefore, the doubling auxiliary device 17 doubling the first group of yarns Y1 and the second group of yarns Y2 to a lesser extent than the doubling device 16, and the doubling auxiliary device 17 plays a supplementary role in doubling.

[0107] In the spinning and drawing apparatus 3A, the first group yarn Y1 passes through the yarn feed roller 12 and is introduced into the heat insulation box 30 from the inlet 30a. Inside the heat insulation box 30, it is passed over godet rollers 31 to 33, which are preheating rollers, godet rollers 34 and 35, which are heat-setting rollers, and the doubling auxiliary device 17. Specifically, the first group yarn Y1 is passed over and travels through the godet roller 31, godet roller 32, godet roller 33, godet roller 34, godet roller 35, and the doubling auxiliary device 17 in this order. The first group yarn Y1 is preheated by the godet rollers 31 to 33, which are preheating rollers, to a temperature at which it can be drawn (a temperature equal to or higher than the glass transition point). The preheated first group yarn Y1 becomes a drawn yarn due to the difference in yarn feed speed between the godet roller 33 and the godet roller 34. Furthermore, the first group of yarns Y1 is heat set in a stretched state by godet rollers 34 and 35.

[0108] On the other hand, the second group yarn Y2 passes through the guide roller 36A and is introduced into the thermal insulation box 30A from the inlet 30c, where it is wound around the godet rollers 34, 35 and the doubling auxiliary device 37. Inside the thermal insulation box 30A, the second group yarn Y2 is guided from the guide roller 36A to the godet roller 34 adjacent to the right side wall 38b of the thermal insulation box 30A. That is, the second group yarn Y2 reaches the godet roller 34, which is a heat-set roller, without passing through the godet rollers 31 to 33, which are preheating rollers. Because the second group yarn Y2 is wound around the godet rollers 34, 35 without passing through the godet rollers 31 to 33, it is heat-set by the godet rollers 34, 35 in the state of a partially oriented yarn.

[0109] The first group yarn Y1 and the second group yarn Y2, which meet at the godet roller 34, are doubling by the doubling assisting device 37 to form a mixed yarn Y3. The mixed yarn Y3 is led out of the thermal insulation box 30A from the lead-out port 30b, passes through yarn feed rollers 13 to 15, and is wound by the winding device 4. Between the yarn feed roller 13 and the yarn feed roller 14, the mixed yarn Y3 is doubling again by the doubling device 16.

[0110] [Threading unit] Fig. 25 is a perspective view showing a threading unit 5A according to a second embodiment of the present invention. Fig. 26 is a front view showing the threading unit 5A attached to the thermal insulation box 30A of the spinning and drawing unit 3A of the mixed yarn production apparatus 1. Fig. 26 shows the state in which the door 39 of the thermal insulation box 30A is open. The threading unit 5A will be described below with reference to Figs. 25 and 26.

[0111] The threading unit 5A is used in the mixed yarn manufacturing apparatus 1A, which produces mixed yarn Y3 by combining yarns Y1 of the first group with yarns Y2 of the second group, during the threading operation of winding the yarns Y2 of the second group around a guide roller 36A while winding the yarns Y1 of the first group around a plurality of godet rollers 31 to 33 configured as preheating rollers.

[0112] Like the threading unit 5 of the first embodiment, the threading unit 5A is configured to include an attachment portion 51 and a thread hooking portion 52. However, the threading unit 5A is configured to be shorter in the longitudinal direction than the threading unit 5 of the first embodiment. That is, the lengths of the attachment portion 51 and the thread hooking portion 52 of the threading unit 5A are set shorter than the lengths of the attachment portion 51 and the thread hooking portion 52 of the threading unit 5 of the first embodiment. As a result, the threading unit 5A is configured to handle a threading operation in which the second group of yarns Y2 are wound around the guide roller 36A, while the first group of yarns Y1 are wound around the plurality of godet rollers 31-33, which are preheating rollers.

[0113] The attachment portion 51 of the threading unit 5A is provided as a portion of the threading unit 5A that can be detachably attached to the box body 38 of the thermal insulation box 30A. The attachment portion 51 has a base 51a and multiple (two in the second embodiment) hook portions 51b. The base 51a is provided as an elongated, plate-like member that extends linearly in the longitudinal direction. When the attachment portion 51 is attached to the box body 38, the base 51a is disposed in a state extending along the edge of the right side wall 38b of the box body 38. Note that the base 51a of the threading unit 5A is formed to have a shorter longitudinal length than the base 51 of the threading unit 5 of the first embodiment. The length of the base 51 is set, for example, to correspond to the length of the edge of the side wall 38b from the inlet 30a to the inlet 30c of the thermal insulation box 30A.

[0114] The hook portions 51b of the attachment portion 51 of the threading unit 5A are formed in the same manner as the hook portions 51b of the attachment portion 51 of the threading unit 5 of the first embodiment. The hook portions 51b are provided with engagement claws 51c that engage with the locking grooves 38c in the side walls 38b of the box body 38 of the thermal insulation box 30A. When the attachment portion 51b is attached to the box body 38, each hook portion 51b is inserted into the corresponding locking groove 38c provided in the side wall 38b of the box body 38. Then, with each hook portion 51b inserted into each locking groove 38c, the attachment portion 51 is operated so that the position of the attachment portion 51b is shifted downward, whereby the engagement claws 51c on the tip side of each hook portion 51b engage with a step in each locking groove 38c. The engaging claw 51c of the hook portion 51b engages with a step in the locking groove 38c, thereby attaching the mounting portion 51 to the box main body 38 and holding it thereon. Note that, in the present embodiment, the mounting portion 51 is attached to the box main body 38 by the hook portion 51b engaging with the locking groove 38c, but this is not necessarily the case as long as the mounting portion 51 is configured to be detachably attached to the box main body 38. For example, the side wall 38b of the box main body 38 may be provided with a groove other than the locking groove 38c, and the hook portion 51b may engage with the other groove provided in the side wall 38b, thereby enabling the mounting portion 51 to be detachably attached to the box main body 38.

[0115] The thread hooking portion 52 of the threading unit 5A is provided as a portion around which the second group of threads Y2 is hooked when the attachment portion 51 is attached to the box body 38, and the second group of threads Y2 are hooked when a threading operation is performed using the threading unit 5A. As shown in FIG. 26 , when the attachment portion 51 is attached to the box body 38, the thread hooking portion 52 is spaced apart from the godet rollers 31-33 (preheating rollers) and extends along the edge of the side wall 38b of the box body 38 on which the guide roller 36A is disposed. Furthermore, when the attachment portion 51 is attached to the box body 38, the thread hooking portion 52 is located at a position protruding outward from the box body 38 relative to the godet rollers 31-33 (preheating rollers) and protruding beyond the end faces of the godet rollers 31-33 in the axial direction of the godet rollers 31-33, extending along the edge of the side wall 38b of the box body 38.

[0116] Specifically, the yarn hooking portion 52 includes a rod-shaped portion 52a and a pair of legs 52b. The rod-shaped portion 52a extends parallel to the longitudinal direction of the base portion 51a of the mounting portion 51. When the mounting portion 51 is attached to the box body 38, the rod-shaped portion 52a is spaced apart from the godet rollers 31-33 (preheating rollers) and extends linearly in the vertical direction along the front edge of the side wall 38a of the box body 38 on which the guide roller 36A is disposed. When the mounting portion 51 is attached to the box body 38, the rod-shaped portion 52a extends vertically from a position corresponding to the height of the lower half of the godet roller 34 to a position corresponding to the height of the lower half of the godet roller 31.

[0117] The pair of legs 52b of the threading portion 52 of the threading unit 5A are formed in the same manner as the pair of legs 52b of the threading portion 52 of the threading unit 5 of the first embodiment. Each of the pair of legs 52b is provided so as to protrude from the base 51a toward the side opposite to the side from which the hook portion 51b protrudes. Each leg 52b is fixed to the base 51a at one end and integrally connected to the rod-shaped portion 52a at the other end to support the rod-shaped portion 52a. As a result, when the mounting portion 51 is attached to the box body 38 of the thermal insulation box 30A, the leg 52b protrudes forward in the horizontal direction from the edge of the side wall 38b of the box body 38. When the mounting portion 51 is attached to the box body 38 of the thermal insulation box 30, the rod-shaped portion 52a is positioned so as to extend in the vertical direction parallel to the edge of the side wall 38b at a position spaced apart from the edge of the side wall 38b of the box body 38.

[0118] With the above-described configuration, the rod-shaped portion 52a of the threading portion 52 of the threading unit 5A is configured to extend parallel to the longitudinal direction of the base 51a, at a distance corresponding to the length of the leg 52b from the base 51a of the mounting portion 51. The rod-shaped portion 52a of the threading portion 52 extends linearly at a position spaced apart from the base 51a of the mounting portion 51 by the length of the leg 52b, so that when the mounting portion 51 is attached to the box body 38 of the thermal insulation box 30, the rod-shaped portion 52a extends along the edge of the side wall 38b of the box body 38 at a position protruding beyond the end faces of the godet rollers 31-33 in the axial direction of the godet rollers 31-33.

[0119] [Threading work using a threading unit] Figures 27 to 33 are diagrams showing the state in which threading work is performed using the threading unit 5A in the mixed yarn production apparatus 1A. With reference to Figures 26 to 33, the manner in which threading work is performed using the threading unit 5A in the mixed yarn production apparatus 1A will be described.

[0120] When producing the mixed yarn Y3, first, prior to the production of the mixed yarn Y3, a threading operation is performed in which the multiple yarns Y spun from the spinning device 2 are divided into a first group of yarns Y1 and a second group of yarns Y2, and the second group of yarns Y2 are wound around the guide roller 36A, while the first group of yarns Y1 are wound around the multiple godet rollers 31 to 33. When the threading operation is performed, as shown in Fig. 26, first, with the door 39 of the thermal insulation box 30A open, the threading unit 5A is attached to the box body 38 of the thermal insulation box 30A at the edge of the side wall 38b of the box body 38 that is spaced apart from the multiple godet rollers 31 to 33 and where the guide roller 36A is located. At this time, the worker (not shown) performing the threading work engages the hook portion 51b of the attachment portion 51 with the lock groove 38c in the side wall 38b of the box body 38, and attaches the threading unit 5A to the box body 38. When the threading unit 5A is attached to the box body 38, the threading portion 52 of the threading unit 5A is positioned to extend along the edge of the side wall 38b of the box body 38 at a position that protrudes beyond the end faces of the godet rollers 31-33 in the axial direction of the godet rollers 31-33.

[0121] 27 is a diagram showing a state in which the first group of yarns Y1 is wound around the yarn feed roller 12 outside the thermal insulation box 30, and the second group of yarns Y2 is wound around the guide roller 36A. Referring to FIG. 27, after the yarn threading unit 5A is attached to the box main body 38, the operator uses the suction gun 100 to suck in the multiple yarns Y spun from the spinning device 2, and separates the multiple yarns Y into the first group of yarns Y1 and the second group of yarns Y2.

[0122] When separating multiple yarns Y into a first group of yarns Y1 and a second group of yarns Y2, the operator first winds the multiple yarns Y sucked into the suction gun 100 around the guide roller 36A. Then, the operator holds the suction gun in one hand and a yarn separating tool (not shown) that can hook the yarns at the tip end with the other hand. The operator uses the yarn separating tool held in the other hand to separate the multiple yarns being spun into the first group of yarns Y1 and the second group of yarns Y2. Next, while leaving the second group of yarns Y2 wound around the guide roller 36A, the operator operates the yarn separating tool to wind the first group of yarns Y1 around the yarn feed roller 12. Once the second group of yarns Y2 is wound around the guide roller 36A and the first group of yarns Y1 is wound around the yarn feed roller 12, the operator releases the yarn separating tool and holds the suction gun 100 with both hands. Then, while holding the suction gun 100 with both hands, the operator manipulates the position of the suction gun 100 so that the suction port 100a of the suction gun 100 moves between the godet roller 31 and the yarn hooking portion 52 of the yarn hooking unit 5A. As a result, as shown in Fig. 27, the first yarn group Y1 wound around the yarn feed roller 12 passes through the introduction port 30a of the box main body 38, and the second yarn group Y2 wound around the guide roller 36A passes over the rod-shaped portion 52a of the yarn hooking portion 52 while being hooked on the outer periphery of the rod-shaped portion 52a.

[0123] 28 is a diagram showing a state in which the first group of yarns Y1 is wound around the first godet roller 31 in the yarn running direction. When the first group of yarns Y1 passes through the introduction port 30a and the second group of yarns Y2 passes through the guide roller 36 and the yarn hooking portion 52, the operator manipulates the position of the suction gun 100 with the suction port 100a of the suction gun 100 inserted inside the box body 38. At this time, as shown in FIG. 28, the operator manipulates the suction gun 100 with both hands so as to move the suction port 100a clockwise in FIG. 28 along the outer periphery of the godet roller 31. As a result, the first group of yarns Y1 is wound around the godet roller 31 in the yarn running direction of the first group of yarns Y1. Furthermore, when the first group yarn Y1 is wound around the godet roller 31, the second group yarn Y2 is hooked on the yarn hooking portion 52, which extends from the guide roller 36 to the suction port 100a of the suction gun 100 at a position protruding beyond the end surface of the godet roller 31, in the yarn path leading from the guide roller 36 to the suction port 100a of the suction gun 100. Therefore, when the suction gun 100 is operated to wind the first group yarn Y1 around the godet roller 31, the yarn path of the second group yarn Y2 is maintained in a state of bypassing a position protruding beyond the end surface of the godet roller 31. This prevents the second group yarn Y2 from being wound around the godet roller 31 along the same yarn path as the first group yarn Y1 when the first group yarn Y1 is wound around the godet roller 31.

[0124] 29 is a diagram showing a state in which the first group yarn Y1 is wound around the second godet roller 32 in the yarn traveling direction. When the first group yarn Y1 has passed through the first godet roller 31 in the yarn traveling direction, the operator further adjusts the position of the suction gun 100 with the suction port 100a of the suction gun 100 inserted inside the box body 38. At this time, as shown in FIG. 29, the operator operates the suction gun 100 with both hands so as to move the suction port 100a counterclockwise in FIG. 29 along the outer periphery of the godet roller 32. As a result, the first group yarn Y1 is wound around the godet roller 32 in the yarn traveling direction of the first group yarn Y1. Furthermore, when the first group yarn Y1 is wound around the godet roller 32, the second group yarn Y2 is hooked on the yarn hooking portion 52, which extends from the guide roller 36 to the suction port 100a of the suction gun 100 at a position protruding beyond the end surface of the godet roller 32, in the yarn path leading from the guide roller 36 to the suction port 100a of the suction gun 100. Therefore, when the suction gun 100 is operated to wind the first group yarn Y1 around the godet roller 32, the yarn path of the second group yarn Y2 is maintained in a state of bypassing a position protruding beyond the end surface of the godet roller 32. This prevents the second group yarn Y2 from being wound around the godet roller 32 along the same yarn path as the first group yarn Y1 when the first group yarn Y1 is wound around the godet roller 32.

[0125] 30 is a diagram showing a state in which the first group yarn Y1 is wound around the third godet roller 33 in the yarn traveling direction. When the first group yarn Y1 has passed through the second godet roller 32 in the yarn traveling direction, the operator further adjusts the position of the suction gun 100 with the suction port 100a of the suction gun 100 inserted inside the box body 38. At this time, as shown in FIG. 30, the operator operates the suction gun 100 with both hands so as to move the suction port 100a clockwise in FIG. 30 along the outer periphery of the godet roller 33. As a result, the first group yarn Y1 is wound around the godet roller 33 in the yarn traveling direction of the first group yarn Y1. Furthermore, when the first group yarn Y1 is wound around the godet roller 33, the second group yarn Y2 is hooked on the yarn hooking portion 52, which extends from the guide roller 36 to the suction port 100a of the suction gun 100 at a position protruding beyond the end surface of the godet roller 33, in the yarn path leading from the guide roller 36 to the suction port 100a of the suction gun 100. Therefore, when the suction gun 100 is operated to wind the first group yarn Y1 around the godet roller 33, the yarn path of the second group yarn Y2 is maintained in a state of bypassing a position protruding beyond the end surface of the godet roller 33. This prevents the second group yarn Y2 from being wound around the godet roller 33 along the same yarn path as the first group yarn Y1 when the first group yarn Y1 is wound around the godet roller 33.

[0126] FIG. 31 shows the state in which the first group yarn Y1 and the second group yarn Y2 are wound around the fourth godet roller 34 in the yarn traveling direction of the first group yarn Y1. When the first group yarn Y1 has passed through the third godet roller 33 in the yarn traveling direction, the operator further adjusts the position of the suction gun 100 with the suction port 100a of the suction gun 100 inserted inside the box body 38. At this time, as shown in FIG. 31, the operator operates the suction gun 100 with both hands to move the suction port 100a counterclockwise in FIG. 31 along the outer periphery of the godet roller 34. At this time, the yarn hooking portion 52 of the yarn hooking unit 5A, which extends from below to above along the edge of the side wall 38b of the box body 38, only extends to a position corresponding to the height of the lower half of the godet roller 34, that is, to a position below the guide roller 36A. Therefore, when the suction gun 100 is operated so that the suction port 100a moves counterclockwise in FIG. 31 along the outer periphery of the godet roller 34, the second group yarn Y2 that was hooked on the yarn hooking portion 52 of the yarn threading unit 5A is released from the yarn hooking portion 52. The second group yarn Y2 that has been released from the yarn hooking portion 52 of the yarn threading unit 5A is then wound around the guide roller 36A and passes through the introduction port 30c. After the second group yarn Y2 is released from the yarn hooking portion 52 and wound around the guide roller 36A, when the suction gun 100 is further operated so that the suction port 100a moves counterclockwise in FIG. 31 along the outer periphery of the godet roller 34, the first group yarn Y1 and the second group yarn Y2 are wound around the godet roller 34 in the yarn running directions of the first group yarn Y1 and the second group yarn Y2.

[0127] FIG. 32 shows the state in which the first group yarn Y1 and the second group yarn Y2 are wound around the fifth godet roller 35 in the yarn running direction of the first group yarn Y1. After the first group yarn Y1 and the second group yarn Y2 have passed through the godet roller 34, the operator further adjusts the position of the suction gun 100 with the suction port 100a of the suction gun 100 inserted inside the box body 38. At this time, as shown in FIG. 32, the operator operates the suction gun 100 with both hands so as to move the suction port 100a clockwise in FIG. 32 along the outer periphery of the godet roller 35. As a result, the first group yarn Y1 and the second group yarn Y2 are wound around the godet roller 35 in the yarn running direction of the first group yarn Y1 and the second group yarn Y2.

[0128] 33 shows a state in which the first group yarn Y1 is wound around all of the godet rollers 31-35, and the second group yarn Y2, which has been wound around the guide roller 36A, is also wound around some of the godet rollers 34, 35. When the first group yarn Y1 has passed through all of the godet rollers 31-35 and the second group yarn Y2 has passed through the guide roller 36 and the godet rollers 34, 35, the operator operates the suction gun 100 to cause the first yarn Y1 and the second yarn Y2 to pass through the doubling assist device 17. Furthermore, as shown in FIG. 33, the operator manipulates the position of the suction gun 100 so that the suction port 100a of the suction gun 100 passes through the outlet 30b. As a result, the mixed yarn Y3, which has passed through the doubling assist device 17, is discharged from the outlet 30b, and the threading operation is completed. Thereafter, the position of the suction gun sucking the mixed yarn Y3 delivered from the delivery port 30b is manipulated, whereby the mixed yarn Y3 is wound around the yarn sending rollers 13 to 15 and then taken up by the winding device 4.

[0129] [Action and effect] As described above, according to the second embodiment of the present invention, when threading is performed in the mixed yarn manufacturing apparatus 1A to produce the mixed yarn Y3, the threading unit 5A is first attached to the box body 38 of the thermal insulation box 30A at the edge of the side wall 38b of the box body 38, which is spaced apart from the godet rollers 31-33 and where the guide roller 36A is located. At this time, the threading portion 52 of the threading unit 5A is positioned so as to extend along the edge of the side wall 38b of the box body 38, protruding beyond the end faces of the godet rollers 31-33 in the axial direction of the godet rollers 31-33. Then, the threading operation is performed in this state. When the threading operation begins, the operator uses the suction gun 100 to suck in the multiple yarns Y spun from the spinning device 2 and separates the multiple yarns Y into a first group of yarns Y1 and a second group of yarns Y2. The separated second group of yarns Y2 is wound around a guide roller 36A that is spaced apart from the godet rollers 31-33 and that is disposed on the side wall 38b of the box body 38 to which the yarn threading unit 5A is attached. Then, while holding the suction gun 100 that sucks in the multiple yarns Y with both hands, the operator operates the position of the suction gun 100 to sequentially wind the first group of yarns Y1 around the multiple godet rollers 31-33. At this time, the second group of yarn Y2, which has been wound around the guide roller 36A and sucked into the suction gun, is caught on the yarn hooking portion 52 of the yarn hooking unit 5A, which extends along the edge of the side wall 38b of the box body 38, at a position protruding outward from the godet rollers 31-33 in the yarn path leading from the guide roller 36A to the suction port 100a of the suction gun 100 and protruding further from the end faces of the godet rollers 31-33 in the axial direction of the godet rollers 31-33. Therefore, when the operator holds the suction gun 100 with both hands and operates it to sequentially wind the first group of yarn Y1 around the godet rollers 31-33, the second group of yarn Y2 remains hooked on the yarn hooking portion 52 of the yarn hooking unit 5A.As a result, throughout the operation of winding the first group yarn Y1 around the godet rollers 31-33, the yarn path of the second group yarn Y2 is maintained in a state where a part of the yarn path of the second group yarn Y2 located between the guide roller 36A and the suction gun 100 protrudes further outward from the box body 38 than the godet rollers 31-33 and detours around a position protruding further axially than the end faces of the godet rollers 31-33. This prevents the second group yarn Y2 from being wound around the godet rollers 31-33 along the same yarn path as the first group yarn Y1. Therefore, the operator can easily perform the threading operation of sequentially winding the first group of yarns Y1 around the plurality of godet rollers 31-33 while operating the heavy suction gun 100 with both hands and keeping the yarn path of the first group of yarns Y1 and the yarn path of the second group of yarns Y2 separate. Furthermore, since the threading operation can be easily performed, the time required for the threading operation can be significantly reduced. Furthermore, the significant reduction in the time required for the threading operation reduces the amount of yarn sucked into the suction gun 100 during the operation, significantly reducing the amount of lint generated.

[0130] Therefore, according to the second embodiment of the present invention, it is possible to provide a yarn threading unit 5A and a mixed yarn manufacturing apparatus equipped with the yarn threading unit 5A, which allow the user to easily perform the threading operation of sequentially winding the first group of yarn Y1 around multiple godet rollers 31 to 33 while operating the suction gun 100 with both hands, thereby significantly shortening the time required for the threading operation and reducing the amount of yarn sucked into the suction gun 100 to significantly reduce the amount of yarn waste generated.

[0131] The above describes embodiments and modifications of the present invention, but the present invention is not limited to the above-described embodiments and modifications, and can be implemented in various modifications within the scope of the claims. [Explanation of symbols]

[0132] 1. 1A blended yarn manufacturing equipment 2. Spinning equipment 3 Spinning and drawing equipment 5, 5A, 6, 7, 8 threading units 30 Heat insulation box 31~35 Godet Roller 36, 36A, 37 Guide rollers 38 Box body 39 Door 51, 61, 71, 81 Mounting part 52, 62, 72, 82 Thread guide

Claims

1. a plurality of godet rollers each having a heating source, around which at least a first group of yarns, which are separated as a portion of a plurality of yarns spun from a spinning device, are wound, and which heat and stretch at least the first group of yarns; a heat insulating box having a box body that houses the plurality of godet rollers and a door that opens and closes the box body; a guide roller for guiding a second group of yarns separated from the plurality of yarns as yarns other than the first group of yarns; a yarn winding unit used to wind the yarns of the first group around a plurality of godet rollers while winding the yarns of the second group around the guide roller, the yarns comprising: a mounting portion that is detachably attached to the box body; a yarn hooking portion provided to extend along an edge portion of the box body closer to the guide roller than the godet rollers when the mounting portion is attached to the box body, and around which the second group of yarns is hooked; Equipped with a threading unit configured to thread the godet rollers in a direction perpendicular to the axis of the godet rollers, the threading unit being ... parallel to the axis of the godet rollers, the threading unit being configured to thread the godet rollers

2. The yarn threading unit according to claim 1, The thread threading unit is characterized in that the thread threading portion has a rod-shaped portion that extends linearly along the edge of the box body closer to the guide roller than the plurality of godet rollers when the mounting portion is attached to the box body.

3. The yarn threading unit according to claim 1, The yarn threading unit is characterized in that the yarn threading portion has a flat portion extending along the edge of the box body closer to the guide roller than the plurality of godet rollers when the mounting portion is attached to the box body.

4. a plurality of godet rollers each having a heating source, around which at least a first group of yarns, which are separated as a portion of a plurality of yarns spun from a spinning device, are wound, and which heat and stretch at least the first group of yarns; a heat insulating box having a box body that houses the plurality of godet rollers and a door that opens and closes the box body; a guide roller for guiding a second group of yarns separated from the plurality of yarns as yarns other than the first group of yarns; a yarn winding unit used to wind the yarns of the first group around a plurality of godet rollers while winding the yarns of the second group around the guide roller, the yarns comprising: a mounting portion that is detachably attached to the box body; a yarn hooking portion, on which the second group of yarns is hooked, the yarn hooking portion being spaced apart from the godet rollers and extending along an edge portion of the side wall of the box body on which the guide rollers are disposed when the mounting portion is attached to the box body; and Equipped with a threading unit configured to thread the godet rollers in a direction perpendicular to the axis of the godet rollers, the threading unit being ...

5. a plurality of godet rollers each having a heating source, around which at least a first group of yarns, which are separated as a portion of a plurality of yarns spun from a spinning device, are wound, and which heat and stretch at least the first group of yarns; a heat insulating box having a box body that houses the plurality of godet rollers and a door that opens and closes the box body; a guide roller for guiding a second group of yarns separated from the plurality of yarns as yarns other than the first group of yarns; a doubling device for doubling the yarns of the first group and the yarns of the second group to produce a blended yarn; a yarn hooking unit used to wind the second group of yarns onto the guide roller while winding the first group of yarns onto the godet rollers; Equipped with The threading unit includes: a mounting portion attached to the box body; a thread hook portion provided to extend along an edge portion of the box body closer to the guide roller than the plurality of godet rollers, and around which the second group of threads is hooked; and The yarn hooking portion is provided so as to extend along the edge of the box body at a position protruding beyond the end surfaces of the godet rollers in the axial direction of the godet rollers.

6. a plurality of godet rollers each having a heating source, around which at least a first group of yarns, which are separated as a portion of a plurality of yarns spun from a spinning device, are wound, and which heat and stretch at least the first group of yarns; a heat insulating box having a box body that houses the plurality of godet rollers and a door that opens and closes the box body; a guide roller for guiding a second group of yarns separated from the plurality of yarns as yarns other than the first group of yarns; a doubling device for doubling the yarns of the first group and the yarns of the second group to produce a blended yarn; a yarn hooking unit used to wind the second group of yarns onto the guide roller while winding the first group of yarns onto the godet rollers; Equipped with The threading unit includes: a mounting portion attached to the box body; a yarn hooking portion, which is spaced apart from the plurality of godet rollers and extends along an edge portion of the side wall of the box body where the guide rollers are disposed, and on which the second group of yarns is hooked; and The yarn hooking portion is provided so as to extend along the edge of the side wall of the box body at a position protruding beyond the end faces of the godet rollers in the axial direction of the godet rollers.

Images