Automatic winder

Abstract

To improve suction force of yarns of an upper suction part.SOLUTION: An automatic winder 100, 100' includes a winding unit 1 that winds yarns supplied from a yarn supplying bobbin B to form a package, end providing devices 39a, 39b that pull out yarn ends of the yarn supplying bobbin B, and a suction source 9 that sucks a chamber 7. The end providing devices 39a, 39b have upper suction parts 391a, 391b that suck and pull out yarns end at the upper part of the yarn supplying bobbin B, lower suction parts 392a, 392b that suck yarn ends pulled out by the upper suction parts 391a, 391b at the lower part of the yarn supplying bobbin B and suck them into an upper opening of the yarn supplying bobbin B, upper connecting pipes 394a, 394b that connect the chamber 7 and the upper suction parts 391a, 391b, and a lower connecting pipe 396 that connects the chamber 7 and the lower suction parts 392a, 392b. The upper connecting pipes 394a and 394b do not have any branches that generate suction force at positions other than the upper suction parts 391a, 391b.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to an automatic winder that winds a yarn to form a package.

Background Art

[0002] Conventionally, an automatic winder for forming a yarn package has been known. The automatic winder includes a winding unit that winds the yarn supplied from a supply bobbin to form a package, and a thread leading-out device that pulls out a yarn end from the supply bobbin to prepare for winding. The thread leading-out device has an upper suction part that sucks the yarn end at the upper part of the supply bobbin to pull out the yarn end at the upper part of the supply bobbin, and a lower suction part that sucks the yarn end pulled out by the upper suction part at the lower part of the supply bobbin and sucks it into the upper opening of the supply bobbin (the opening at the upper end of the bobbin tube of the supply bobbin) (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The above automatic winder has a chamber connected to the thread leading-out device and a suction source that applies a suction force to the thread leading-out device by sucking the chamber. In the conventional thread leading-out device, the upper suction part and the lower suction part shared one pipe connected to the chamber. Further, other devices may be connected to this one pipe. For this reason, a sufficient suction force of the yarn is not generated particularly in the upper suction part, and the success rate of sucking (thread leading-out) the yarn end from the upper part of the supply bobbin may be low.

[0005] An object of the present invention is to improve the suction force of the yarn in the upper suction part that pulls out the yarn end from the supply bobbin.

Means for Solving the Problem

[0006] The following describes a plurality of aspects as means for solving the problem. These aspects can be arbitrarily combined as necessary. An automatic winder according to one aspect of the present invention includes a winding unit, a thread outlet device, a chamber, and a suction source. The winding unit winds the thread supplied from a supply bobbin to form a package. The thread outlet device pulls out the thread end of the supply bobbin. The chamber is connected to the thread outlet device. The suction source sucks the chamber.

[0007] The thread outlet device has an upper suction part, a lower suction part, an upper connecting pipe, and a lower connecting pipe. The upper suction part sucks and pulls out the thread end above the supply bobbin. The lower suction part sucks the thread end pulled out by the upper suction part at the lower part of the supply bobbin and sucks it into the upper opening of the supply bobbin. The upper connecting pipe connects the chamber and the upper suction part. The lower connecting pipe connects the chamber and the lower suction part. Further, the upper connecting pipe does not have a branch that generates a suction force at a location other than the upper suction part.

[0008] In the thread outlet device of the above automatic winder, a pipe (upper connecting pipe) connecting the upper suction part and the chamber and a pipe (lower connecting pipe) connecting the lower suction part and the chamber are provided independently and individually. Further, the upper connecting pipe has no branch and does not generate a suction force on other devices. With this configuration, no gas inflow from devices other than the upper suction part occurs in the pipe (upper connecting pipe) to which the upper suction part is connected. Since no gas inflow from other than the upper suction part occurs in the pipe to which the upper suction part is connected, the suction force of the thread of the upper suction part can be improved. As a result, the success rate of pulling out the thread end from the supply bobbin can be improved.

[0009] In the above automatic winder, the upper connecting pipe may have at least one bent portion. In this case, the bending angle of the bent portion may be less than 90 degrees. Thereby, the resistance of the gas flow in the upper connecting pipe can be reduced, so that the suction force by the upper connecting pipe can be improved. By improving the suction force by the upper connecting pipe, the suction force of the yarn of the upper suction portion can be improved.

[0010] In the above automatic winder, the bending angle of the bent portion may be 60 degrees or less. Thereby, the suction force by the upper connecting pipe can be further improved.

[0011] In the above automatic winder, the chamber may include a first chamber connected to the winding unit. Further, the suction source may include a first suction source that suctions the first chamber. In this case, the upper connecting pipe and the lower connecting pipe may be connected to the first chamber. Thereby, the chamber and the suction source can be made common between the winding unit and the pay-out device.

[0012] In the above automatic winder, the chamber may include a first chamber connected to the winding unit and a second chamber independent of the first chamber. Further, the suction source may include a second suction source that suctions the second chamber. In this case, the upper connecting pipe and the lower connecting pipe may be connected to the second chamber. Thereby, the chamber and the suction source can be made independent between the winding unit and the pay-out device.

[0013] In the above automatic winder, a plurality of pay-out devices may be provided. In this case, the upper connecting pipe of one pay-out device may be provided independently of the upper connecting pipes of other pay-out devices. Thereby, in each of the plurality of pay-out devices, the suction force of the yarn of the upper suction portion can be improved.

[0014] In the above automatic winder, the lower connecting pipe may be common to a plurality of pay-out devices. Thereby, the number of pipes can be reduced.

Advantages of the Invention

[0015] The thread suction force of the upper suction part that draws out the thread end from the yarn supply bobbin can be improved, and the success rate of drawing out the thread end from the yarn supply bobbin can be improved.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0017] 1. First Embodiment (1) Automatic winder Using FIG. 1, the automatic winder 100 will be described. FIG. 1 is a schematic plan view of the automatic winder 100. The automatic winder 100 includes a winding unit 1, a bobbin processing device 3, a bobbin supply device 5, a chamber 7, and a suction source 9.

[0018] The winding unit 1 is provided on one end side of the bobbin processing device 3. The winding unit 1 is a device that rewinds the thread wound around the yarn supply bobbin B onto the winding tube to form a thread product package. The winding unit 1 is, for example, a device that forms a package by rotating the winding tube and winding the thread of the yarn supply bobbin B onto the winding tube while traversing the thread with a traversing arm, or a device that forms a package by rotating the winding tube and winding the thread of the yarn supply bobbin B onto the winding tube while traversing the thread with a drum provided with a traversing groove.

[0019] The automatic winder 100 includes a plurality of winding units 1. The number of winding units 1 installed in the automatic winder 100 can be arbitrary.

[0020] As shown in Fig. 1, on the base 11 provided at the lower part of the winding unit 1, there are formed a supply path 13 for transporting the supply bobbin B from the bobbin processing device 3 to the winding unit 1, and a recovery path 15 for transporting the empty bobbin EB discharged from each winding unit 1 to the bobbin processing device 3. The supply path 13 and the recovery path 15 are composed of, for example, a belt conveyor or the like.

[0021] In addition, the transportation of the bobbins (supply bobbin B, empty bobbin EB) in the base 11 and the bobbin processing device 3 is carried out by the tray Tr with the bobbin inserted being transported by a belt conveyor or the like provided on the transportation path.

[0022] The bobbin processing device 3 is a device that extracts the empty bobbin EB without yarn wound thereon from the tray Tr, which has been transported by the recovery path 15 of the winding unit 1, attaches the supply bobbin B with yarn wound thereon to the tray Tr, and supplies the supply bobbin B to the supply path 13 of the winding unit 1.

[0023] The bobbin supply device 5 is provided on the other end side (the end opposite to the end where the winding unit 1 is provided) of the bobbin processing device 3, and is a device that supplies the supply bobbin B to the bobbin processing device 3.

[0024] The chamber 7 is a hollow member that extends in the arrangement direction of the plurality of winding units 1 on the back of the plurality of winding units 1. The suction source 9 is connected to the chamber 7 at one end of the chamber 7. The suction source 9 sucks the internal space of the chamber 7 to create a negative pressure. The suction source 9 is, for example, a blower.

[0025] The winding unit 1 is connected to the first side surface 71 of the chamber 7. Also, on the second side surface 73 on the other end side (the end opposite to the end where the suction source 9 is connected) of the chamber 7, the first bunch unwinding device 35a, the first outlet device 39a, the second bunch unwinding device 35b, and the second outlet device 39b of the bobbin processing device 3 are connected. The winding unit 1, the first bunch unwinding device 35a, the first outlet device 39a, the second bunch unwinding device 35b, and the second outlet device 39b are supplied with the suction force of the yarn by the suction source 9 via the chamber 7.

[0026] (2) Bobbin processing device Hereinafter, the bobbin processing device 3 will be described in detail. The bobbin processing device 3 has a tray conveyance line 30. The tray conveyance line 30 serves as a conveyance means for the supply bobbin B and the empty bobbin EB, and conveys them while mounted on the tray Tr. The tray conveyance line 30 is connected to the supply path 13 and the recovery path 15 of the winding unit 1.

[0027] The tray Tr on which the supply bobbin B is mounted is supplied to the winding unit 1 by the tray conveyance line 30 of the bobbin processing device 3 and the supply path 13 of the winding unit 1. On the other hand, the tray Tr on which the empty bobbin EB is mounted is returned to the bobbin processing device 3 from the winding unit 1 by the recovery path 15 of the winding unit 1 and the tray conveyance line 30 of the bobbin processing device 3.

[0028] The tray conveyance line 30 has a guide path and a belt conveyor disposed below the guide path. The tray Tr is placed on the belt conveyor and conveyed along the guide path. This configuration is the same for the above supply path 13 and recovery path 15. Positioning of the tray Tr moving on the tray conveyance line 30 to each device is performed by a stopper. Therefore, the drive of the belt conveyor of the tray conveyance line 30 basically does not stop.

[0029] The tray conveyance line 30 has a main conveyance line 30a and a return conveyance line 30b. The main conveyance line 30a is a path that conveys the empty bobbin EB discharged from the winding unit 1, replaces the empty bobbin EB with the supply bobbin B on the way, and conveys it toward the winding unit 1. The main conveyance line 30a is generally formed in a U shape. Here, the start end portion of the main conveyance line 30a is connected to the end end portion of the recovery path 15, and the end end portion of the main conveyance line 30a is connected to the start end portion of the supply path 13.

[0030] The return conveyance line 30b is, for example, a path for reprocessing the yarn supply bobbin B that has failed in the doffing process. The return conveyance line 30b is a bypass path that connects the terminal end and the starting end of the main conveyance line 30a.

[0031] In the bobbin processing device 3, a bobbin extraction device 31 and a yarn supply bobbin supply device 33 are arranged along the main conveyance line 30a.

[0032] The bobbin extraction device 31 is a device that extracts and recovers the empty bobbin EB from the tray Tr. The yarn supply bobbin supply device 33 is a device that mounts the yarn supply bobbin B on the tray Tr in a substantially upright state. The yarn supply bobbin B is supplied to the yarn supply bobbin supply device 33 from the bobbin supply device 5.

[0033] The yarn supply bobbin supply device 33 includes a bobbin loading device, a parts feeder, a bobbin sorting device, and a pair of bobbin shoots. The yarn supply bobbin supply device 33 can supply the yarn supply bobbin B to the tray Tr at two locations by the bobbin sorting device and the pair of bobbin shoots. Each bobbin shoot drops the bobbin so as to be inserted into the tray Tr. The bobbin shoot is composed of, for example, each split piece obtained by axially bisecting a cylindrical member such as a square pipe body or a conical cylindrical body.

[0034] In the main conveyance line 30a, downstream of the yarn supply bobbin supply device 33 in the conveyance direction, a first bunch unwinding device 35a, a first yarn end processing device 37a, and a first doffing device 39a are arranged. In the return conveyance line 30b, a second bunch unwinding device 35b, a second yarn end processing device 37b, and a second doffing device 39b are arranged. That is, the bobbin processing device 3 is provided with a plurality (two) of bunch unwinding devices, yarn end processing devices, and doffing devices.

[0035] The first bunch unwinding device 35a and the second bunch unwinding device 35b suck and cut the bottom bunch yarn wound around the lower part of the yarn supply bobbin B. The first bunch unwinding device 35a and the second bunch unwinding device 35b rotate the tray Tr on which the yarn supply bobbin B is placed to release the bottom bunch yarn, suck the released bottom bunch yarn into the housing, and cut the bottom bunch yarn sucked into the housing with a rotary cutter.

[0036] The first yarn end processing device 37a and the second yarn end processing device 37b are devices that peel off the back-wound yarn wound around the surface of the yarn layer of the yarn supply bobbin B and remove the end yarn side thereof. The first yarn outlet device 39a and the second yarn outlet device 39b are devices that dissociate and pull out the yarn end from the surface of the yarn supply bobbin B and insert the pulled-out yarn end into the inside of the bobbin tube from the top of the bobbin tube.

[0037] The flow of the tray Tr in the above bobbin processing device 3 will be described. When the empty tray Tr reaches a position directly below the bobbin chute of the yarn supply bobbin supply device 33, the yarn supply bobbin B is placed on the empty tray Tr in a substantially upright state.

[0038] Thereafter, the tray Tr is conveyed along the main conveyance line 30a toward the first bunch unwinding device 35a on the downstream side. In the first bunch unwinding device 35a, the bottom bunch yarn formed on the yarn supply bobbin B is removed. The yarn supply bobbin B from which the bottom bunch yarn has been removed is conveyed along the main conveyance line 30a toward the first yarn end processing device 37a. In the first yarn end processing device 37a, the back-wound yarn wound around the surface of the yarn layer of the yarn supply bobbin B is cut, and a tip-side winding portion is formed. The yarn supply bobbin B from which the back-wound yarn has been cut is conveyed along the main conveyance line 30a toward the first yarn outlet device 39a. In the first yarn outlet device 39a, the tip-side winding portion is sucked upward and inserted into the inside of the bobbin tube of the yarn supply bobbin B.

[0039] The yarn supply bobbin B with the yarn end protruding is conveyed further downstream along the main conveyance line 30a and supplied to the supply path 13. The yarn supply bobbin B is conveyed along the supply path 13 and supplied to any one of the winding units 1. In the winding unit 1, the yarn is unwound from the yarn supply bobbin B, and the unwound yarn is wound up as a package. The tray Tr on which the empty bobbin EB with all the yarn unwound is placed is discharged from the winding unit 1, conveyed along the recovery path 15, and returned to the main conveyance line 30a of the bobbin processing apparatus 3 again. The empty bobbin EB returned to the main conveyance line 30a is conveyed to the bobbin extraction device 31. In the bobbin extraction device 31, the empty bobbin EB placed on the tray Tr is extracted.

[0040] (3) Yarn outlet device Hereinafter, with reference to FIGS. 2 and 3, the above-described first yarn outlet device 39a and second yarn outlet device 39b will be described in detail. FIG. 2 is a diagram showing the configuration of the yarn outlet device. FIG. 3 is a diagram showing the piping from the chamber 7 to the bobbin processing apparatus 3. The first yarn outlet device 39a and the second yarn outlet device 39b are devices for pulling out yarn from the yarn supply bobbin B and supplying it to the winding unit 1. The first yarn outlet device 39a includes a first upper suction portion 391a and a first lower suction portion 392a. The second yarn outlet device 39b includes a second upper suction portion 391b and a second lower suction portion 392b.

[0041] The first upper suction part 391a and the second upper suction part 391b are respectively arranged at positions corresponding to the upper parts of the yarn supply bobbins B stopped by the first yarn outlet device 39a and the second yarn outlet device 39b, and at the upper parts of the yarn supply bobbins B, the yarn ends of the yarn supply bobbins B are sucked and pulled out. A first cutter 393a is provided in the first upper suction part 391a. A second cutter 393b is provided in the second upper suction part 391b. The first cutter 393a and the second cutter 393b respectively cut the yarn sucked by the first upper suction part 391a and the second upper suction part 391b. The first cutter 393a and the second cutter 393b have movable blades that can move. The movable blades move to positions blocking the interiors of the first upper suction part 391a and the second upper suction part 391b, cut the yarn sucked by the first upper suction part 391a and the second upper suction part 391b, and block the suction by the first upper suction part 391a and the second upper suction part 391b.

[0042] The first upper suction part 391a is connected to the second side surface 73 of the chamber 7 by the first upper connecting pipe 394a. The second upper suction part 391b is connected to the second side surface 73 of the chamber 7 by the second upper connecting pipe 394b. Thereby, the first upper suction part 391a is supplied with the suction force of the yarn by the suction source 9 via the first upper connecting pipe 394a and the chamber 7. The second upper suction part 391b is supplied with the suction force of the yarn by the suction source 9 via the second upper connecting pipe 394b and the chamber 7.

[0043] As shown in FIG. 3, the upper connecting pipe connected to the upper suction part of one of the plurality of yarn outlet devices is provided independently of the upper connecting pipe connected to the upper suction part of the other yarn outlet devices. Specifically, in the example shown in FIG. 3, the first upper suction part 391a of the first yarn outlet device 39a is connected to the first upper connecting pipe 394a. On the other hand, the second upper suction part 391b of the second yarn outlet device 39b is connected to a second upper connecting pipe 394b independent of the first upper connecting pipe 394a.

[0044] In this way, since a plurality of upper suction parts do not share one upper connection pipe, that is, the first upper suction part 391a and the second upper suction part 391b do not share one upper connection pipe, the first upper suction part 391a and the second upper suction part 391b can "monopolize" the suction force generated by the first upper connection pipe 394a and the second upper connection pipe 394b respectively, so that a large suction force at the yarn end can be generated.

[0045] Also, the first upper connection pipe 394a and the second upper connection pipe 394b are structured such that they do not generate a suction force at locations other than the first upper suction part 391a and the second upper suction part 391b respectively. Specifically, the first upper connection pipe 394a and the second upper connection pipe 394b do not have a branch pipe for sucking other locations. In this way, since the first upper connection pipe 394a and the second upper connection pipe 394b do not share one suction pipe with other devices or the like, the first upper suction part 391a and the second upper suction part 391b can "monopolize" the suction force generated by the first upper connection pipe 394a and the second upper connection pipe 394b respectively, so that a large suction force at the yarn end can be generated.

[0046] The first upper connection pipe 394a and the second upper connection pipe 394b have at least one bending part 395a to 395d. Specifically, the first upper connection pipe 394a has two bending parts 395a and 395b. The second upper connection pipe 394b has two bending parts 395c and 395d.

[0047] As shown in FIG. 3, at least one of the bending parts 395a to 395d has a bending angle θ smaller than 90 degrees and a gentle bend. The bending angle θ of the bending parts 395a to 395d with a gentle bend is preferably 60 degrees or less, more preferably in the range of 40 degrees to 60 degrees, and even more preferably 45 degrees.

[0048] Since the bending angles θ of the bending portions 395a to 395d are the angles as described above, the resistance to the gas flow that generates suction force in the first upper connecting pipe 394a and the second upper connecting pipe 394b can be reduced, so that the suction force by the first upper connecting pipe 394a and the second upper connecting pipe 394b can be improved. By improving the suction force by the first upper connecting pipe 394a and the second upper connecting pipe 394b, the suction force of the yarn of the first upper suction portion 391a and the second upper suction portion 391b connected thereto can be improved.

[0049] As described above, the first upper connecting pipe 394a and the second upper connecting pipe 394b are provided independently for each of the first upper suction portion 391a and the second upper suction portion 391b, and do not have a branch that generates a suction force at other locations other than the first upper suction portion 391a and the second upper suction portion 391b. Since the bending of the bending portions 395a to 395d is loose, due to these synergistic effects, a very large suction force can be generated in the first upper connecting pipe 394a and the second upper connecting pipe 394b. As a result, the suction force of the yarn of the first upper suction portion 391a connected to the first upper connecting pipe 394a and the second upper suction portion 391b connected to the second upper connecting pipe 394b can be made very large, and the success rate of pulling out the yarn end from the yarn supply bobbin B can be greatly improved.

[0050] The first lower suction portion 392a is provided so as to face the first upper suction portion 391a below the tray conveyance line 30. The second lower suction portion 392b is provided so as to face the second upper suction portion 391b below the return conveyance line 30b. When the yarn supply bobbin B reaches the position of the first yarn outlet device 39a, the first lower suction portion 392a sucks the yarn end drawn by the first upper suction portion 391a below the yarn supply bobbin B and sucks it inside the upper opening (the top opening of the bobbin tube) of the yarn supply bobbin B. When the yarn supply bobbin B reaches the position of the second yarn outlet device 39b, the second lower suction portion 392b sucks the yarn end drawn by the second upper suction portion 391b below the yarn supply bobbin B and sucks it inside the upper opening of the yarn supply bobbin B.

[0051] Specifically, as shown in FIG. 2, when the yarn supply bobbin B is at the position of the first yarn outlet device 39a, the tray Tr on which the yarn supply bobbin B is placed is disposed directly above the first lower suction portion 392a. Thereby, the first lower suction portion 392a generates a suction force at the upper opening of the yarn supply bobbin B through an air flow path perforated so as to penetrate the central portion of the tray Tr by its suction force. When the first upper suction portion 391a sucks the yarn end, the first cutter 393a cuts the yarn end and stops the suction of the first upper suction portion 391a, the yarn end sucked by the first upper suction portion 391a drops, and is sucked into the upper opening of the yarn supply bobbin B by the suction force generated at the upper opening of the yarn supply bobbin B by the first lower suction portion 392a.

[0052] When the yarn supply bobbin B is at the position of the second yarn outlet device 39b, the tray Tr on which the yarn supply bobbin B is placed is disposed directly above the second lower suction portion 392b. Thereby, the second lower suction portion 392b generates a suction force at the upper opening of the yarn supply bobbin B through an air flow path perforated so as to penetrate the central portion of the tray Tr by its suction force. When the second upper suction portion 391b sucks the yarn end, the second cutter 393b cuts the yarn end and stops the suction of the second upper suction portion 391b, the yarn end sucked by the second upper suction portion 391b drops, and is sucked into the upper opening of the yarn supply bobbin B by the suction force generated at the upper opening of the yarn supply bobbin B by the second lower suction portion 392b.

[0053] The first lower suction portion 392a is connected to the second side surface 73 of the chamber 7 by a lower connecting pipe 396. Thereby, the first lower suction portion 392a is supplied with the suction force of the yarn through the lower connecting pipe 396 and the chamber 7 by the suction source 9.

[0054] As described above, the first upper suction part 391a does not share the first upper connection pipe 394a with other upper suction parts (the second upper suction part 391b) and other devices. The second upper suction part 391b does not share the second upper connection pipe 394b with other upper suction parts (the first upper suction part 391a) and other devices. On the other hand, the first lower suction part 392a can share the lower connection pipe 396 with other lower suction parts (the second lower suction part 392b). That is, the lower connection pipe 396 is shared by a plurality of yarn outlet devices (the first yarn outlet device 39a and the second yarn outlet device 39b).

[0055] Specifically, as shown in FIG. 3, the first lower suction part 392a of the first yarn outlet device 39a is connected to the end part 396a of the lower connection pipe 396, and the second lower suction part 392b of the second yarn outlet device 39b is connected to the branch part 396b of the lower connection pipe 396. The first upper suction part 391a and the second upper suction part 391b preferably have a large suction force for sucking the yarn end from the yarn supply bobbin B. On the other hand, the first lower suction part 392a and the second lower suction part 392b do not particularly require a large suction force. For this reason, one lower connection pipe 396 can be shared by a plurality of lower suction parts. In this way, by sharing one lower connection pipe by a plurality of lower suction parts, the number of pipes provided in the automatic winder 100 can be reduced.

[0056] As shown in FIG. 3, the first bunch unwinding device 35a and the second bunch unwinding device 35b are connected to the second side surface 73 of the chamber 7 by the connection pipe 41. Thereby, the first bunch unwinding device 35a and the second bunch unwinding device 35b are supplied with the suction force of the yarn by the suction source 9 through the connection pipe 41 and the chamber 7. In this way, a plurality of bunch unwinding devices are connected to one connection pipe 41 and share it. In this way, since the first bunch unwinding device 35a and the second bunch unwinding device 35b do not particularly require a large suction force, one connection pipe 41 can be shared by a plurality of bunch unwinding devices. In this way, by sharing one connection pipe 41 by a plurality of bunch unwinding devices, the number of pipes provided in the automatic winder 100 can be reduced.

[0057] As shown in FIG. 3, in the first yarn outlet device 39a, a first upper connecting pipe 394a connecting the first upper suction part 391a and the chamber 7, and a lower connecting pipe 396 connecting the first lower suction part 392a and the chamber 7 are provided independently and individually. In the second yarn outlet device 39b, a second upper connecting pipe 394b connecting the second upper suction part 391b and the chamber 7, and a lower connecting pipe 396 connecting the second lower suction part 392b and the chamber 7 are provided independently and individually.

[0058] Further, the first upper connecting pipe 394a and the second upper connecting pipe 394b have no branches and do not generate suction force for other devices. With this configuration, no gas inflow from devices other than the upper suction part occurs in the first upper connecting pipe 394a connected to the first upper suction part 391a and the second upper connecting pipe 394b connected to the second upper suction part 391b. Since no gas inflow from other than the upper suction part occurs in the pipe connected to the upper suction part, the suction force of the yarn of the upper suction part can be improved. As a result, the success rate of pulling out the yarn end from the supply bobbin B can be improved.

[0059] 2. Second Embodiment In the above first embodiment, the chamber 7 for generating the suction force of the yarn and the suction source 9 were shared by the winding unit 1 and the bobbin processing device 3. However, it is not limited to this, and the chamber and suction source for the winding unit 1 and the chamber and suction source for the bobbin processing device 3 may be made independent.

[0060] As shown in FIG. 4, the automatic winder 100' of the second embodiment includes a first chamber 7a, a second chamber 7b, a first suction source 9a, and a second suction source 9b. The first chamber 7a is connected to the first suction source 9a and is connected to the winding unit 1. Thereby, the winding unit 1 is provided with the suction force of the yarn by the first suction source 9a via the first chamber 7a. FIG. 4 is a schematic plan view of the automatic winder 100' of the second embodiment.

[0061] The second chamber 7b is connected to the first upper connecting pipe 394a, the second upper connecting pipe 394b, the lower connecting pipe 396, and the connecting pipe 41 of the bobbin processing device 3. The second suction source 9b is provided inside the second chamber 7b and sucks the second chamber 7b. Thereby, the bobbin processing device 3 is provided with the suction force of the yarn by the second suction source 9b via the second chamber 7b.

[0062] 3. Other Embodiments As described above, an embodiment of the present invention has been described. However, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the gist of the invention. In particular, a plurality of embodiments and modifications described in this specification can be arbitrarily combined as necessary. (A) Instead of connecting the first bunch unwinding device 35a and / or the second bunch unwinding device 35b to the connecting pipe 41, it may be connected to the lower connecting pipe 396. That is, the lower connecting pipe 396 may be shared by (a plurality of) lower suction portions and bunch unwinding devices.

[0063] (B) In the above first embodiment, a plurality of outlet devices were provided in the bobbin processing device 3. However, the present invention is not limited to this, and the above technology can also be applied when one outlet device is provided in the bobbin processing device 3.

[0064] (C) In particular, it is preferable that the first upper connecting pipe 394a and the second upper connecting pipe 394b have as few bending portions 395a to 395d as possible. The first upper connecting pipe 394a and / or the second upper connecting pipe 394b may be a straight pipe without a bending portion.

[0065] 4. Features of the Embodiment The above embodiment can also be described as follows. (1) The automatic winder (e.g., automatic winders 100, 100') includes a winding unit (e.g., winding unit 1), a thread outlet device (e.g., first thread outlet device 39a, second thread outlet device 39b), a chamber (e.g., chamber 7, first chamber 7a, second chamber 7b), and a suction source (e.g., suction source 9, first suction source 9a, second suction source 9b). The winding unit winds the thread supplied from a supply bobbin (e.g., supply bobbin B) to form a package. The thread outlet device pulls out the thread end of the supply bobbin. The chamber is connected to the thread outlet device. The suction source suctions the chamber.

[0066] The thread outlet device has an upper suction part (e.g., first upper suction part 391a, second upper suction part 391b), a lower suction part (e.g., first lower suction part 392a, second lower suction part 392b), an upper connecting pipe (e.g., first upper connecting pipe 394a, second upper connecting pipe 394b), and a lower connecting pipe (e.g., lower connecting pipe 396). The upper suction part suctions and pulls out the thread end above the supply bobbin. The lower suction part suctions the thread end pulled out by the upper suction part at the lower part of the supply bobbin and suctions it to the upper opening of the supply bobbin. The first suction pipe connects the chamber and the upper suction part. The lower connecting pipe connects the chamber and the lower suction part. Also, the upper connecting pipe has no branch that generates a suction force at a location other than the upper suction part.

[0067] In the thread outlet device of the above automatic winder, a pipe (upper connecting pipe) connecting the upper suction part and the chamber and a pipe (lower connecting pipe) connecting the lower suction part and the chamber are provided independently and individually. Also, the upper connecting pipe has no branch and does not generate a suction force on other devices. With this configuration, no gas inflow from devices other than the upper suction part occurs in the pipe (upper connecting pipe) to which the upper suction part is connected. Since no gas inflow from other than the upper suction part occurs in the pipe to which the upper suction part is connected, the suction force of the thread of the upper suction part can be improved. As a result, the success rate of pulling out the thread end from the supply bobbin can be improved.

[0068] (2) In the automatic winder of (1) above, the upper connecting pipe may have at least one bent portion (for example, bent portions 395a to 395d). In this case, the bending angle of the bent portion (for example, bending angle θ) may be less than 90 degrees. Thereby, the resistance of the gas flow in the upper connecting pipe can be reduced, so that the suction force by the upper connecting pipe can be improved. By improving the suction force by the upper connecting pipe, the suction force of the yarn of the upper suction portion can be improved.

[0069] (3) In the automatic winder of (2) above, the bending angle of the bent portion may be 60 degrees or less. Thereby, the suction force by the upper connecting pipe can be further improved.

[0070] (4) In the automatic winder according to any one of (1) to (3) above, the chamber may include a first chamber (for example, chamber 7) connected to the winding unit. Further, the suction source may include a first suction source (for example, suction source 9) that suctions the first chamber. In this case, the upper connecting pipe and the lower connecting pipe may be connected to the first chamber. Thereby, the chamber and the suction source can be made common between the winding unit and the yarn outlet device.

[0071] (5) In the automatic winder according to any one of (1) to (3) above, the chamber may include a first chamber (for example, first chamber 7a) connected to the winding unit and a second chamber (for example, second chamber 7b) independent of the first chamber. Further, the suction source may include a second suction source (for example, second suction source 9b) that suctions the second chamber. In this case, the upper connecting pipe and the lower connecting pipe may be connected to the second chamber. Thereby, the chamber and the suction source can be made independent between the winding unit and the yarn outlet device.

[0072] (6) In the automatic winder according to any one of (1) to (5) above, a plurality of yarn outlet devices may be provided. In this case, the upper connecting pipe of one yarn outlet device may be provided independently of the upper connecting pipes of other yarn outlet devices. Thereby, in each of the plurality of yarn outlet devices, the suction force of the yarn of the upper suction portion can be improved.

[0073] (7) In any of the automatic winders (1) to (6) above, the lower connecting pipe may be shared by a plurality of outlet devices. This can reduce the number of pipes.

Industrial Applicability

[0074] The present invention can be widely applied to an automatic winder that winds yarn to form a package.

Explanation of Signs

[0075] 100, 100’: Automatic winder 1: Winding unit 11: Base 13: Supply path 15: Recovery path 3: Bobbin processing device 30: Tray conveyance line 30a: Main conveyance line 30b: Return conveyance line 31: Bobbin extraction device 33: Feed bobbin supply device 35a: First bunch unwinding device 35b: Second bunch unwinding device 37a: First yarn end processing device 37b: Second yarn end processing device 39a: First outlet device 391a: First upper suction part 392a: First lower suction part 393a: First cutter 394a: First upper connecting pipe 395a, 395b: Bending part 39b: Second outlet device 391b: Second upper suction part 392b: Second lower suction part 393b: Second cutter 394b: Second upper connecting pipe 395c, 395d: Bending part 396: Lower connecting pipe 396a: Terminal part 396b: Branch part 41: Connecting pipe Tr: Tray 5: Bobbin supply device 7: Chamber 7a: First chamber 7b: Second chamber 71: First side 73: Second side 9: Suction source 9a: First suction source 9b: Second suction source B: Yarn supply bobbin EB: Empty bobbin θ: Bending angle

Claims

1. A winding unit that winds the yarn supplied from the supply bobbin to form a package, A yarn outlet device that draws out the yarn end of the supply bobbin, A chamber connected to the yarn outlet device, A suction source that sucks the chamber, Comprising, The yarn outlet device is, An upper suction part that sucks and draws out the yarn end above the supply bobbin, At the lower part of the supply bobbin, a lower suction part that sucks the yarn end drawn out by the upper suction part and sucks it into the upper opening of the supply bobbin, An upper connecting pipe connecting the chamber and the upper suction part, A lower connecting pipe connecting the chamber and the lower suction part, Having, The upper connecting pipe has no branch that generates a suction force at a location other than the upper suction part, Automatic winder.

2. The upper connecting pipe has at least one bent part, The bending angle of the bent part is less than 90 degrees, the automatic winder according to claim 1.

3. The bending angle of the bent part is 60 degrees or less, the automatic winder according to claim 2.

4. The chamber includes a first chamber connected to the winding unit, The suction source includes a first suction source that sucks the first chamber, The upper connecting pipe and the lower connecting pipe are connected to the first chamber, the automatic winder according to any one of claims 1 to 3.

5. The chamber includes a first chamber connected to the winding unit and a second chamber independent of the first chamber, The suction source includes a second suction source that sucks the second chamber, The upper connecting pipe and the lower connecting pipe are connected to the second chamber, the automatic winder according to any one of claims 1 to 3.

6. A plurality of the yarn outlet devices are provided, The upper connecting pipe of one yarn outlet device is provided independently of the upper connecting pipes of other yarn outlet devices, the automatic winder according to any one of claims 1 to 5.

7. The lower connecting pipe is common to a plurality of yarn outlet devices, the automatic winder according to claim 6.

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