Yarn winding machine

Abstract

A yarn winding machine is provided. A winding unit (2) includes a yarn feeding section (6), a yarn storage device (18), a yarn receiving device (14), a downstream yarn blowing section (48), a first catching section (13A) that catches a yarn end of the yarn (20) on the yarn storage device (18) side blown by the downstream yarn blowing section (48) and guides the yarn (20) to the yarn receiving device (14), and a second catching section (13B) that catches a yarn end of the yarn (20) on the yarn feeding bobbin (21) side and guides the yarn (20) to the yarn receiving device (14).

Description

Technical Field

[0001] This invention relates to a yarn winding machine. Background Technology

[0002] As a conventional yarn winding machine, for example, the yarn winding machine described in Japanese Patent Application Publication No. 2017-57075 is known. The yarn winding machine described in Japanese Patent Application Publication No. 2017-57075 comprises: a yarn feeding section supporting a yarn feeding tube; a yarn holding device that unwinds yarn from the yarn feeding tube supported on the yarn feeding section and winds the unwound yarn; a yarn splicing device that splices the yarn end of the yarn on the yarn feeding tube side to the yarn end of the yarn on the yarn holding device side; a downstream yarn blowing section that blows the yarn end of the yarn on the yarn holding device side downstream in the direction of yarn winding; a first capturing section that captures the yarn end of the yarn on the yarn holding device side blown by the downstream yarn blowing section and guides the yarn to the yarn splicing device; and a second capturing section that captures the yarn end of the yarn on the yarn feeding tube side and guides the yarn to the yarn splicing device.

[0003] In the yarn winding machine described in Japanese Patent Application Publication No. 2017-57075, the second capturing part is positioned downstream of the first capturing part in the direction of yarn travel during winding.

[0004] The second capturing unit captures the yarn blown in from the upstream side of the yarn's travel direction by the upstream yarn blowing unit, and guides the yarn to the yarn splicing device by using the advance and retreat drive unit to move the second capturing unit forward and backward relative to the yarn path.

[0005] In conventional yarn winding machines, to prevent the yarn on the feed tube side from tangling with the yarn on the yarn storage device side, after the first capture unit captures the yarn end of the yarn on the yarn storage device side and guides it to the yarn splicing device, the second capture unit captures the yarn on the feed tube side. Therefore, the second capture unit remains idle until the first capture unit guides the yarn to the splicing device. In yarn winding machines, to improve production efficiency, it is desirable to shorten the cycle time of the splicing operation. To shorten the cycle time of the splicing operation, it is necessary to reduce the idle time of both the first and second capture units. Summary of the Invention

[0006] One objective of this invention is to provide a yarn winding machine capable of shortening the cycle time of the yarn splicing action.

[0007] A yarn winding machine according to one aspect of the present invention includes: a yarn feeding section supporting a yarn feeding tube; a yarn holding device unwinding yarn from the yarn feeding tube supported on the yarn feeding section and winding the unwound yarn; a package forming section leading out the yarn held in the yarn holding device and winding it into a package; a yarn splicing device splicing the yarn on the yarn feeding tube side with the yarn on the yarn holding device side; a blowing section blowing the yarn on the yarn holding device side downstream in the direction of yarn winding; and a first capture. The device comprises a first capturing unit that captures yarn from the yarn storage device side blown by the blowing unit and guides the yarn to the yarn receiving device; and a second capturing unit that captures yarn from the yarn feed tube side and guides the yarn to the yarn receiving device. The second capturing unit is configured to swing between a first position and a second position. The first position is the position upstream in the travel direction from the position where the first capturing unit captures yarn from the yarn storage device side, and the second position is the position where the captured yarn is guided to the yarn receiving device.

[0008] In a yarn winding machine according to one aspect of the present invention, a second capturing unit captures yarn at a first position and guides the yarn to a yarn receiving device at a second position. The first position is the position where the yarn on the feed tube side is captured upstream in the yarn winding direction compared to the position where the first capturing unit captures yarn on the yarn holding device side. Thus, in the yarn winding machine, since the second capturing unit captures the yarn on the feed tube side upstream compared to the first capturing unit, the yarn captured by the first capturing unit and the yarn captured by the second capturing unit will not become tangled during capture. Therefore, in the yarn winding machine, the second capturing unit does not need to be idle while the first capturing unit captures and guides the yarn. Therefore, the idle time of the first and second capturing units can be reduced in the yarn winding machine. As a result, the cycle time of the yarn receiving operation can be shortened in the yarn winding machine.

[0009] In one embodiment, the first capturing part and the second capturing part may be configured as an integrated capturing device. In this structure, structural simplification and space saving are achieved.

[0010] In one embodiment, the capturing device may further include a first connecting portion connected to a negative pressure source and a second connecting portion connected to the negative pressure source. A first airflow path for attracting air is formed by the first capturing portion and the first connecting portion, and a second airflow path for attracting air is formed by the second capturing portion and the second connecting portion. The first airflow path and the second airflow path are independent. In this structure, entanglement between the yarn captured in the first capturing portion and the yarn captured in the second capturing portion can be avoided.

[0011] In one embodiment, the capturing device may further include: a rotating part, which is rotatably disposed and connected to the second capturing part, and causes the second capturing part to rotate; and a driving part, which drives the rotating part, and a flow control part is provided in the rotating part, which controls the flow and cut-off of the suction air flowing in the first air flow path between the first capturing part and the first connecting part, and the flow control part controls the flow or cut-off of the suction air according to the rotation position of the rotating part. In this structure, the second capturing part can be driven by a single driving part, and the flow control part can control the flow of the suction air. Therefore, the structure can be simplified.

[0012] In one embodiment, the flow control unit may cut off the suction air when the second capture unit is in the first position, and allow suction air to flow when the second capture unit is not in the first position. In this configuration, when the second capture unit is in the first position, no suction airflow is generated at the first capture unit. Therefore, it is possible to prevent the yarn on the yarn feed tube side from being attracted and captured by the first capture unit.

[0013] According to one aspect of the present invention, it is possible to shorten the cycle time of the yarn splicing action. Attached Figure Description

[0014] Figure 1 This is a summary front view showing the overall structure of an automatic winding machine according to one embodiment.

[0015] Figure 2 This is a schematic side view showing a winding unit in one embodiment.

[0016] Figure 3 This is a three-dimensional diagram representing the capture device.

[0017] Figure 4 This is a perspective view showing the state of the second capturing unit in the capturing device at the capturing position.

[0018] Figure 5 This is a perspective view showing the first capturing part in the capturing device in the guide position. Detailed Implementation

[0019] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Furthermore, in the description of the drawings, the same or equivalent elements are labeled with the same reference numerals, and repeated descriptions are omitted. "Upstream" and "downstream" refer to the upstream and downstream directions of the yarn's travel, respectively.

[0020] like Figure 1 As shown, the automatic winding machine 1 has multiple winding units (yarn winding machines) 2 arranged in parallel, a machine control device 3, a yarn feeding tube supply device 4, a doffing device 5, and a blower box (not shown).

[0021] The machine control device 3 is configured to communicate with each winding unit 2. The operator of the automatic winding machine 1 can centrally manage multiple winding units 2 by appropriately operating the machine control device 3. The machine control device 3 controls the operation of the yarn feeding tube supply device 4 and the doffing device 5.

[0022] The yarn feeding tube supply device 4 places the yarn feeding tubes 21 one by one onto the transfer tray 26. The yarn feeding tube supply device 4 then supplies the yarn feeding tubes 21 placed on the transfer tray 26 to multiple winding units 2.

[0023] When the winding unit 2 is fully wound (with a specified amount of yarn 20 wound on it), the doffing device 5 moves to the position of the winding unit 2 and removes the fully wound 30. The doffing device 5 then places the unwound yarn tube 22 onto the winding unit 2 after the winding unit 2 has removed the winding 30.

[0024] Next, the structure of winding unit 2 will be explained. For example... Figure 2 As shown, the winding unit 2 includes a yarn feeding section 6, a yarn holding device 18, a package forming section 8, and a waxing device 70. In the winding unit 2, the yarn 20 of the yarn feeding tube 21 of the yarn feeding section 6 is unwound. After the unwound yarn 20 is temporarily held by the yarn holding device 18, the package forming section 8 draws out the yarn 20 held in the yarn holding device 18 and winds it onto the winding tube 22 to form a package 30.

[0025] The yarn feeding section 6 is configured to support the yarn feeding tube 21 placed on the transfer tray 26 at a predetermined position, and to unwind the yarn 20 from the yarn feeding tube 21. When all the yarn 20 has been unwound from the yarn feeding tube 21, the yarn feeding section 6 discharges the core tube of the yarn feeding tube 21 that is not wrapped with yarn 20, and receives a new yarn feeding tube 21 from the yarn feeding tube supply device 4.

[0026] A yarn retention device 18 is disposed between the yarn feeding section 6 and the package forming section 8. The yarn retention device 18 is positioned upstream of the waxing device 70 in the direction of yarn 20 travel. The yarn retention device 18 winds the unwound yarn 20 from the yarn feeding section 6 and temporarily retains it. The yarn retention device 18 supplies the retained yarn 20 to the package forming section 8. The yarn retention device 18 includes a yarn retention roller 32 capable of winding the yarn 20 and a roller drive motor 33 that rotates the yarn retention roller 32. The roller drive motor 33 rotates the yarn retention roller 32 in the direction of winding the yarn 20 from the yarn feeding section 6. Alternatively, the roller drive motor 33 can also rotate the yarn retention roller 32 in the opposite direction to the winding direction.

[0027] The package forming section 8 includes a cradle 23 configured to mount the winding bobbin 22, and a traversing drum 24 that drives the winding bobbin 22 while traversing the yarn 20. The package forming section 8 constitutes a winding section. The cradle 23 supports the winding bobbin 22 (or package 30) in a rotatable manner. The cradle 23 is configured to allow the outer peripheral surface of the supported package 30 to contact the outer peripheral surface of the traversing drum 24.

[0028] The traverse drum 24 is driven to rotate by a drive source (such as an electric motor, not shown in the diagram), and rotates while in contact with the outer peripheral surface of the winding tube 22 or the package 30, thereby causing the winding tube 22 to rotate passively. This allows the yarn 20 stored in the yarn storage device 18 to be unwound and drawn out, and then wound onto the winding tube 22. A traverse groove (not shown in the diagram) is formed on the outer peripheral surface of the traverse drum 24, which allows the yarn 20 to traverse at a predetermined width. In this structure, the yarn 20 can be wound onto the winding tube 22 while traversing, forming a package 30 of a predetermined shape.

[0029] A waxing device 70 is disposed between the yarn holding device 18 and the package forming section 8. The waxing device 70 applies wax to the yarn 20 that travels from the yarn holding device 18 toward the package forming section 8.

[0030] The winding unit 2 is equipped with various devices in the yarn travel path from the yarn feeding section 6 through the yarn holding device 18 to the package forming section 8. Specifically, on the yarn path (yarn travel path) of the yarn 20, from the upstream yarn feeding section 6 side to the downstream yarn holding device 18 side, the following are arranged in sequence: unwinding assist device 10, lower yarn detector 11, tension application section 12, capturing device 13, yarn splicing device 14, yarn monitoring device 16, and downstream yarn blowing section 48.

[0031] The unwinding assist device 10 makes the movable part 27 contact the air ring formed on the upper part of the yarn feeding tube 21 as the yarn 20 is unwound from the yarn feeding tube 21, and appropriately controls the size of the air ring, thereby assisting the unwinding of the yarn 20.

[0032] The yarn detector 11 is positioned downstream of the unwinding aid 10, close to the unwinding aid 10. The yarn detector 11 determines whether there is yarn 20 supplied from the unwinding aid 10.

[0033] The tension applying unit 12 applies a predetermined tension to the traveling yarn 20. The tension applying unit 12 applies the predetermined tension to the yarn 20 based on the tension detected by a tension sensor (not shown). The tension applying unit 12 is configured as a gate-like structure with movable comb teeth arranged relative to fixed comb teeth, applying a predetermined resistance by causing the yarn 20 to travel between the comb teeth. The movable comb teeth are configured to be movable via, for example, a solenoid, so that the comb teeth are engaged or disengaged from each other. Thus, the tension applying unit 12 can adjust the tension applied to the yarn 20. Furthermore, the structure of the tension applying unit 12 is not particularly limited; for example, it can also be a disc-type tension applying unit.

[0034] The capturing device 13 is disposed downstream of the tension applying part 12. The capturing device 13 has a first capturing part 13A and a second capturing part 13B. In this embodiment, the first capturing part 13A and the second capturing part 13B are integrated into one component. The first capturing part 13A and the second capturing part 13B are respectively connected to a negative pressure source (not shown).

[0035] The first capturing part 13A is configured as a cylindrical member with an opening at its front end. When the yarn is joined, the first capturing part 13A generates an airflow to attract and capture the yarn 20 on the side of the yarn storage device 18.

[0036] The second capturing part 13B is configured as a cylindrical member with an opening at its front end. The second capturing part 13B is arranged in a swingable manner. The second capturing part 13B is positioned at the first position (where it captures the yarn 20 supplied from the unwinding assist device 10). Figure 2 The position indicated by the solid line in the middle), and the guide position (second position) for guiding the yarn 20 to the yarn receiving device 14 (in Figure 2 It swings between the positions indicated by the dashed line in the middle. The capture position can also be the standby position of the second capture unit 13B.

[0037] The second capturing unit 13B generates an attractive airflow at its front end in a position close to the yarn path downstream of the lower yarn detector 11, thereby attracting and capturing the yarn end from the feed tube 21. When the yarn 20 is cut by the cutter 15, the second capturing unit 13B attracts and captures the yarn end of the cut yarn 20 on the feed tube 21 side. Alternatively, the second capturing unit 13B can also be configured to attract and remove flyaways or other debris adhering to the traveling yarn 20 by generating an attractive airflow at its front end.

[0038] An auxiliary blowing unit 28 is provided. When the yarn 20 is captured by the second capturing unit 13B, after the new yarn feeding tube 21 has just been supplied to the yarn feeding unit 6, the auxiliary blowing unit 28 blows the yarn end to the downstream side of the lower yarn detector 11 (the front end of the second capturing unit 13B).

[0039] The auxiliary blowing unit 28 sprays compressed air into the hollow conveying tray 26 and the yarn feeding tube 21, thereby forming an airflow at the front end of the yarn feeding tube 21 that blows the yarn 20 of the yarn feeding tube 21 toward the lower yarn detector 11. When a newly supplied yarn feeding tube 21 is supported by the yarn feeding unit 6, the operation of the auxiliary blowing unit 28 can reliably deliver the yarn end on the side of the yarn feeding tube 21 toward the lower yarn detector 11.

[0040] The yarn splicing device 14 splices broken yarns 20. When the yarn 20 is cut by the cutter 15 due to a yarn defect detected by the yarn monitoring device 16, when the yarn 20 breaks during unwinding from the yarn feed tube 21, or when the yarn feed tube 21 is replaced, resulting in a break in the yarn 20 between the yarn feed tube 21 and the yarn storage device 18, the yarn splicing device 14 splices the yarn 20 on the yarn feed tube 21 side with the yarn 20 on the yarn storage device 18 side. The yarn splicing device 14 is positioned slightly retracted from the yarn path. The yarn splicing device 14 can connect the ends of the introduced yarns to each other, making the yarn 20 continuous. The yarn splicing device 14 can be a device utilizing fluids such as compressed air or a mechanical device.

[0041] The yarn monitoring device 16 detects yarn defects such as thick spots or foreign matter intrusion by monitoring the thickness of the yarn 20 using appropriate sensors. A cutter 15 is positioned upstream of the yarn monitoring device 16, close to it. The cutter 15 immediately cuts the yarn 20 upon detection of a yarn defect by the yarn monitoring device 16. The cutter 15 and the yarn monitoring device 16 are housed within a common housing 19. The housing 19 housing the yarn monitoring device 16 is positioned downstream of the yarn splicing device 14.

[0042] The downstream yarn blowing section 48 is an air sucker device located upstream of the yarn holding device 18, close to the yarn holding device 18. The downstream yarn blowing section 48 creates an airflow by ejecting compressed air, which blows away and delivers the yarn ends present on the surface of the yarn holding roller 32 (on the side of the yarn holding device 18) to the first capturing section 13A. Specifically, the downstream yarn blowing section 48 includes a thin cylindrical guide member (not shown) that allows the yarn 20 to pass through, and a yarn guide member 60 that is a curved cylindrical member. A yarn 20 outlet is formed at one end of the guide member. The yarn guide member 60 is positioned close to the outlet of the downstream yarn blowing section 48. Openings are formed at both ends of the yarn guide member 60 along its length.

[0043] The yarn guiding member 60 is configured such that one end of its opening faces the outlet of the downstream yarn blowing section 48, and the other end of its opening faces the first capturing section 13A. A guiding path is formed inside the yarn guiding member 60. The guiding path connects the openings at both ends of the yarn guiding member 60 to each other in a manner that bypasses the yarn monitoring device 16 and the yarn splicing device 14. The downstream yarn blowing section 48, the yarn guiding member 60, and the first capturing section 13A constitute the retention-side yarn end capturing device 50.

[0044] When the yarn 20 is disconnected between the yarn feeding tube 21 and the yarn holding device 18, the downstream yarn blowing section 48 captures the yarn 20 on the yarn holding device 18 side and blows it toward the guide path of the yarn guiding member 60. The yarn 20 is then drawn out along this guide path so that it is captured by the first capturing section 13A. Furthermore, a through-type slit (not shown) is formed along the entire length of the yarn guiding member 60, allowing the yarn 20 to be pulled out from inside the yarn guiding member 60 while the first capturing section 13A has captured it. Thus, the downstream yarn blowing section 48 can blow the yarn 20 on the yarn holding device 18 side and guide it toward the yarn receiving device 14 side.

[0045] Each winding unit 2 includes a control unit 25. The control unit 25 includes hardware such as a CPU, ROM, and RAM (not shown in the diagram). Software such as control programs is stored in the RAM. The control unit 25 controls each structure of the winding unit 2 through the cooperation of hardware and software. The control unit 25 is configured to communicate with the machine control device 3. Therefore, the operation of the multiple winding units 2 of the automatic winding machine 1 can be centrally managed in the machine control device 3.

[0046] Next, refer to Figure 3 , Figure 4 and Figure 5 The capturing device 13 will be described in detail. Figure 3 and Figure 4 The image shows the second capturing unit 13B in the capturing position. Figure 5 The image shows the second capture unit 13B in the guide position.

[0047] like Figure 3 , Figure 4 and Figure 5 As shown, the capturing device 13 has a first capturing part 13A, a second capturing part 13B, a main body part 13C, a rotating part 13D, a first connecting part 13E, and a second connecting part 13F.

[0048] As described above, the first capturing part 13A is configured as a cylindrical component with an opening at its front end. The first capturing part 13A is integrally formed with the main body part 13C.

[0049] As described above, the second capturing part 13B is configured as a cylindrical member with an opening at its front end. The second capturing part 13B is configured to include a straight portion and a curved portion, and is generally U-shaped.

[0050] A yarn clamping part 13G is provided at the front end of the second capturing part 13B. The yarn clamping part 13G clamps the yarn 20 attracted by the second capturing part 13B between the yarn clamping part 13G and the front end of the second capturing part 13B. The yarn clamping part 13G releases the clamping of the yarn 20 when the second capturing part 13B is in the capturing position and the guide position, and clamps the yarn 20 when the second capturing part 13B moves from the capturing position to the guide position. The yarn clamping part 13G opens by abutting against the first abutting part 13H or the second abutting part 13I, thereby releasing the clamping of the yarn 20. The first abutting part 13H is disposed in a position abutting against the yarn clamping part 13G when the second capturing part 13B is in the capturing position. The first abutting part 13H is provided on a frame (not shown) via a bracket B1. The second abutting part 13I is disposed in a position abutting against the yarn clamping part 13G when the second capturing part 13B is in the guide position. The second abutment 13I is mounted on a frame (not shown) via bracket B2.

[0051] The main body 13C is configured as a cylindrical component. The main body 13C is fixed to the base body B. One end of the main body 13C in the longitudinal direction is fixed to the base body B. The main body 13C is fixed to the base body B in a manner that protrudes from one surface of the base body B in a direction orthogonal to that surface. A first capturing part 13A is provided on the side of the main body 13C. Viewed from the longitudinal direction (extending direction) of the main body 13C, the first capturing part 13A is provided in a manner that protrudes towards the yarn path side and faces obliquely upward.

[0052] The rotating part 13D is configured as a cylindrical component. The rotating part 13D is housed within the main body 13C. The rotating part 13D is driven by a drive motor (drive unit) 13J. The other end of the rotating part 13D is connected to the output shaft of the drive motor 13J via a pulley and belt (not shown). The drive motor 13J is, for example, a stepper motor. The drive motor 13J is fixed to the base body B. The operation of the drive motor 13J is controlled by the control unit 25. The other end of the rotating part 13D is connected to the second capturing part 13B. Therefore, the second capturing part 13B oscillates as the rotating part 13D rotates.

[0053] A flow control unit 13K and a connecting unit 13L are provided in the rotating part 13D. The flow control unit 13K and the connecting unit 13L are independently provided in the rotating part 13D. A partition wall is provided between the flow control unit 13K and the connecting unit 13L. The flow control unit 13K controls the flow and cut-off of the suction air flowing in the air flow path between the first capturing part 13A and the first connecting part 13E. The flow control unit 13K functions as a gate for controlling the flow and cut-off of the suction air. The flow control unit 13K is, for example, formed in the shape of a groove that cuts off a part of the rotating part 13D.

[0054] The flow control unit 13K controls the flow or cut off of air intake based on the rotational position of the rotating unit 13D, that is, based on the position of the second capturing unit 13B. For example... Figure 5 As shown, when the second capture part 13B is outside the capture position (e.g., in the guide position), the flow control unit 13K causes suction air to flow between the first capture part 13A and the first connecting part 13E. This generates a suction airflow at the front end of the first capture part 13A. Figure 4 As shown, when the second capture part 13B is in the capture position, the flow control unit 13K prevents the suction air from flowing between the first capture part 13A and the first connecting part 13E (reducing the suction air). That is, when the second capture part 13B is in the guide position, the flow control unit 13K cuts off the flow of suction air between the first capture part 13A and the first connecting part 13E. As a result, no suction air flow is generated at the front end of the first capture part 13A.

[0055] The flow control unit 13K controls the flow and cut-off of the intake air by rotating the rotating unit 13D, which is driven by the drive motor 13J. That is, the flow and cut-off of the airflow path realized by the flow control unit 13K is performed by driving the drive motor 13J.

[0056] The connecting portion 13L connects the second capturing portion 13B to the second connecting portion 13F. The connecting portion 13L connects the second capturing portion 13B to the second connecting portion 13F throughout the entire movable range of the second capturing portion 13B. That is, the connecting portion 13L connects the second capturing portion 13B to the second connecting portion 13F whether the second capturing portion 13B is in the capturing position and the guide position, or when it is moving between the capturing position and the guide position. Figure 4 and Figure 5 As shown, an airflow is always generated at the front end of the second capture section 13B through the connecting part 13L.

[0057] The first connecting portion 13E is configured as a cylindrical component. The first connecting portion 13E is connected to a negative pressure source (not shown). The first connecting portion 13E, together with the first capturing portion 13A, forms a first airflow path for attracting air. The first connecting portion 13E and the first capturing portion 13A communicate to form the first airflow path, thereby generating an attracting airflow at the front end of the first connecting portion 13E. The first connecting portion 13E is connected to the side of the main body portion 13C. Viewed along the direction of the yarn 20, the first connecting portion 13E and the first capturing portion 13A are arranged in a straight line. Therefore, since the airflow path is not curved, it is possible to suppress the reduction of the attracting airflow and to prevent the yarn 20 from tangling in the first airflow path.

[0058] The second connecting portion 13F is configured as a cylindrical component. The second connecting portion 13F is connected to a negative pressure source (not shown). The second connecting portion 13F, together with the second capturing portion 13B, forms a second airflow path that attracts air. The first airflow path and the second airflow path are independent of each other. The second connecting portion 13F is connected to the side of the main body portion 13C. The second connecting portion 13F is connected at a position on the opposite end of the main body portion 13C along its length, compared to the first connecting portion 13E.

[0059] Next, the yarn splicing operation in the winding unit 2 will be explained. Hereinafter, the yarn splicing operation when the yarn monitoring device 16 detects a yarn defect and cuts the yarn 20 using the cutter 15 will be described as an example.

[0060] When the yarn 20 is cut by the cutter 15, the second capturing part 13B attracts and captures the yarn 20 on the side of the yarn feed tube 21 in the capturing position. At this time, the clamping part 13G abuts against the first abutting part 13H and is in the open state. When the yarn 20 is captured by the second capturing part 13B, the rotating part 13D rotates, and the second capturing part 13B moves from the capturing position to the guiding position. When the second capturing part 13B begins to move, the clamping part 13G separates from the first abutting part 13H, and the clamping part 13G closes. Thus, the yarn 20 is clamped by the clamping part 13G, and the yarn 20 is held by the second capturing part 13B.

[0061] Next, when the second capturing part 13B is in the guide position, the yarn 20 is guided to the yarn receiving device 14. Furthermore, when the second capturing part 13B is in the guide position, the yarn clamping part 13G abuts against the second abutting part 13I. As a result, the yarn clamping part 13G is opened, and the clamping of the yarn 20 is released.

[0062] Additionally, when the yarn 20 is cut by the cutter 15, the downstream yarn blowing section 48 captures the yarn 20 on the yarn holding device 18 side and blows it towards the guide path of the yarn guiding member 60. When the second capturing section 13B begins to move towards the guiding position, the first capturing section 13A captures the yarn 20 drawn out along the guide path of the yarn guiding member 60. When the first capturing section 13A captures the yarn 20, the yarn 20 on the yarn holding device 18 side is guided to the yarn splicing device 14. Then, the yarn splicing device 14 splices the yarn 20 guided by the first capturing section 13A with the yarn 20 guided by the second capturing section 13B. Thus, the yarn splicing operation ends.

[0063] As explained above, in the winding unit 2 of the automatic winding machine 1 of this embodiment, the second capturing unit 13B captures the yarn 20 at the capturing position and guides the yarn 20 to the yarn receiving device 14 at the guiding position. The capturing position is the position upstream of the yarn end of the yarn 20 on the yarn feeding tube 21 side in the direction of travel during yarn winding, compared to the position where the first capturing unit 13A captures the yarn end of the yarn 20 on the yarn holding device 18 side. Thus, in the winding unit 2, since the second capturing unit 13B captures the yarn end of the yarn 20 on the yarn feeding tube 21 side upstream of the first capturing unit 13A, the yarn 20 captured by the first capturing unit 13A and the yarn 20 captured by the second capturing unit 13B will not tangle during capture. Therefore, in the winding unit 2, during the period when the first capturing unit 13A captures and guides the yarn 20, the second capturing unit 13B does not need to be idle. Therefore, in the winding unit 2, the standby time of the first capturing part 13A and the second capturing part 13B can be reduced. As a result, in the winding unit 2, the cycle time of the yarn receiving operation can be shortened.

[0064] In conventional yarn splicing devices, an upstream yarn blowing unit (suction device) blows the yarn from the feed tube side supplied by the unwinding assist device downstream, and a second capturing unit captures the yarn. In this structure, because the distance between the upstream yarn blowing unit and the second capturing unit is relatively long, if the yarn is not blown up for some reason, undesirable situations may occur, such as the yarn not being captured by the second capturing unit. In the winding unit 2 of this embodiment, the second capturing unit 13B captures the yarn end of the yarn 20 on the feed tube 21 side upstream of the yarn end position on the yarn storage device 18 side compared to the position of the first capturing unit 13A capturing the yarn end of the yarn 20 on the yarn 20 travel direction during winding. In other words, the second capturing unit 13B captures the yarn 20 near the unwinding assist device 10. Therefore, undesirable situations such as the yarn 20 on the feed tube 21 side not being captured by the second capturing unit 13B can be suppressed.

[0065] In the winding unit 2 of this embodiment, the first capturing part 13A and the second capturing part 13B constitute part of the capturing device 13. In the capturing device 13, the first capturing part 13A and the second capturing part 13B are integrated. In this structure, the structure can be simplified and space can be saved.

[0066] In the winding unit 2 of this embodiment, the capturing device 13 includes a first connecting portion 13E connected to a negative pressure source and a second connecting portion 13F connected to the negative pressure source. A first airflow path for attracting air is formed by the first capturing portion 13A and the first connecting portion 13E. A second airflow path for attracting air is formed by the second capturing portion 13B and the second connecting portion 13F. The first airflow path and the second airflow path are independent of each other. In this structure, it is possible to prevent the yarn 20 captured in the first capturing portion 13A from tangling with the yarn 20 captured in the second capturing portion 13B.

[0067] In the winding unit 2 of this embodiment, the capturing device 13 includes: a rotating part 13D, which is rotatably disposed and connected to the second capturing part 13B, causing the second capturing part 13B to oscillate; and a drive motor 13J, which drives the rotating part 13D. A flow control part 13K is provided in the rotating part 13D, which controls the flow and cut-off of suction air flowing in the first airflow path between the first capturing part 13A and the first connecting part 13E. The flow control part 13K controls the flow or cut-off of suction air according to the rotational position of the rotating part 13D. In this structure, the second capturing part 13B can be driven by a single drive motor 13J, and the flow control part 13K can control the flow of suction air. Therefore, structural simplification is achieved.

[0068] In the winding unit 2 of this embodiment, the flow control unit 13K cuts off the suction air when the second capture unit 13B is in the capture position, and allows suction air to flow when the second capture unit 13B is not in the capture position. In this structure, when the second capture unit 13B is in the capture position, no suction airflow is generated in the first capture unit 13A. Therefore, it is possible to prevent the yarn end of the yarn 20 on the yarn feed tube 21 side from being attracted and captured by the first capture unit 13A.

[0069] The embodiments of the present invention have been described above, but the present invention is not necessarily limited to the above embodiments, and various modifications can be made without departing from its spirit.

[0070] In the above embodiment, the first capturing part 13A and the second capturing part 13B in the capturing device 13 are integrated as an example. However, the first capturing part and the second capturing part can also be independent structures. That is, the first capturing part and the second capturing part can also be configured as separate components.

[0071] In the above embodiment, the capture device 13 is described as having a first connecting portion 13E and a second connecting portion 13F as an example. However, the first capture portion 13A and the second capture portion 13B may also be connected to a single connecting portion.

[0072] Based on the above embodiments, a tension application part may also be provided between the yarn storage device 18 and the waxing device 70.

Claims

1. A yarn winding machine, characterized in that, have: The yarn feeding section supports the yarn feeding tube; A yarn storage device that unwinds yarn from the yarn tube supported on the yarn feeding section and winds the unwound yarn. A package forming section that draws out the yarn stored in the yarn storage device and winds it into a package; A yarn splicing device that splices the yarn on the yarn feeding tube side with the yarn on the yarn storage device side; A blowing section that blows the yarn on the yarn storage device side upstream in the direction of travel of the yarn during winding. The first capturing part guides the yarn to the yarn receiving device by capturing the yarn blown by the blowing part from the yarn storage device side; and The second capturing part captures the yarn on the side of the yarn feed tube and guides the yarn to the yarn splicing device. The second capturing part is configured to swing between a first position and a second position. The first position is the position upstream in the travel direction from the position where the first capturing part captures the yarn on the yarn feeding tube side of the yarn, compared to the position where the first capturing part captures the yarn on the yarn holding device side. The second position is the position where the captured yarn is guided to the yarn receiving device. The first capturing unit and the second capturing unit constitute an integrated capturing device. The capturing device is located upstream of the yarn splicing device in the direction of travel. The capturing device has a main body that is configured as a cylindrical component, and the first capturing part is provided on the side of the main body and is arranged to protrude toward the yarn path side when viewed from the extending direction of the main body.

2. The yarn winding machine according to claim 1, characterized in that, The capturing device also includes: The first connection part connected to the negative pressure source; and The second connection part connected to the negative pressure source A first airflow path for attracting air is formed by the first capturing part and the first connecting part. A second airflow path for attracting air is formed by the second capturing part and the second connecting part. The first airflow path and the second airflow path are independent.

3. The yarn winding machine according to claim 2, characterized in that, The capturing device also includes: A rotating part is provided in a rotatable manner and connected to the second capturing part, thereby causing the second capturing part to rotate; and The drive unit drives the rotating part. The rotating part is provided with a flow control unit, which controls the flow and cut-off of the suction air flowing in the first air flow path between the first capturing part and the first connecting part. The flow control unit controls the flow or cut-off of the suction air based on the rotation position of the rotating part.

4. The yarn winding machine according to claim 3, characterized in that, The flow control unit cuts off the suction air when the second capture unit is in the first position, and allows the suction air to circulate when the second capture unit is not in the first position.

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