Yarn winding machine

Abstract

The invention provides a yarn winding machine. The spinning machine (1) is provided with a yarn suction nozzle (27) with a first catching part (33), and a suction device (13) with a function of blowing air onto a yarn (Y2) to catch the yarn (Y2), and if a specified number of yarn joining actions are carried out in a state in which a suction air flow by a blower (55) is no longer generated in a first suction pipeline (51) and a second suction pipeline (52), the suction device (13) sucks the yarn (Y2). The trolley controller (32) waits the yarn joining trolley (3) at a working position relative to the spinning unit (2) if the yarn joining trolley (3) is in a working state, and if the first suction pipeline (51) and the second suction pipeline (52) are in a state of generating suction air flow by the air blower (55) again, the thread ends are collected by the collection box (58) through the first suction pipeline (51) and the second suction pipeline (52).

Description

Technical Field

[0001] The present invention relates to a yarn winding machine. Background Art

[0002] A yarn winding machine includes: a plurality of winding units each having a yarn feeding device for feeding yarn and a winding device for winding the yarn fed from the yarn feeding device to form a package; a yarn splicing device for splicing a first yarn from the yarn feeding device and a second yarn of the package from the winding device; a first catching device for guiding the first yarn to the yarn splicing device; a second catching device for guiding the second yarn to the yarn splicing device; a suction pipeline connected to the first catching device and the second catching device; a blower for generating a suction air flow in the suction pipeline; and a recovery unit for recovering the yarn ends generated by the yarn splicing operation via the suction pipeline (for example, refer to Japanese Unexamined Patent Application Publication No. 2015-183338). The first catching device and the second catching device catch the yarn by the suction air flow of the connected suction pipeline.

[0003] In a yarn winding machine, it is necessary to periodically perform a recovery operation of removing the yarn ends recovered by the recovery unit or a cleaning operation of the recovery unit. When performing various operations, for example, the door of the housing accommodating the recovery unit is opened. When the door is opened, since the pressure inside the recovery unit becomes atmospheric pressure, a state where no suction air flow is generated in the suction pipeline connected to the recovery unit is formed. As a result, the suction force of the first catching device and the second catching device connected to the suction pipeline decreases. In a yarn winding machine, generally, when performing various operations in the yarn winding machine, the yarn splicing operation using the first catching device and the second catching device is not performed. However, there is also a case where various operations are performed during the yarn splicing operation. In this case, since the suction force of the first catching device and the second catching device decreases during the yarn splicing operation, the yarn splicing operation can no longer be performed.

[0004] In addition, after the yarn splicing operation, the yarn ends generated by the yarn splicing operation are recovered by the recovery unit via the suction pipeline. However, if the yarn splicing operation is performed in a state where no suction air flow is generated in the suction pipeline and a large amount of yarn ends accumulate in the suction pipeline, adverse conditions such as the suction pipeline being blocked by the yarn ends may occur. Summary of the Invention

[0005] An object of one aspect of the present invention is to provide a yarn winding machine that can avoid adverse conditions related to the yarn splicing operation even when the yarn splicing operation is performed in a state where no suction air flow is generated in the suction pipeline.

[0006] A yarn winding machine according to one aspect of the present invention includes: a plurality of winding units, each of the plurality of winding units having a yarn feeding device for feeding yarn and a winding device for winding the yarn fed from the yarn feeding device to form a package; a yarn splicing device for splicing a first yarn from the yarn feeding device and a second yarn of the package from the winding device; a first catching device for guiding the first yarn to the yarn splicing device, the first catching device having a first catching portion for sucking and catching the yarn end of the first yarn by jetting compressed air; a second catching device for guiding the second yarn to the yarn splicing device, the second catching device having a second catching portion for sucking and catching the yarn end of the second yarn by jetting compressed air or having a function of blowing compressed air onto the second yarn to catch the second yarn; a suction pipeline connected to the first catching device and the second catching device; a blower for generating a suction air flow in the suction pipeline; a recovery portion for recovering the yarn ends generated by the yarn splicing operation via the suction pipeline; a carriage having the first catching device and configured to be movable along the arrangement direction of the plurality of winding units; and a control portion for controlling the operation of the carriage. If a specified number of yarn splicing operations are performed in a state where no suction air flow based on the blower is generated in the suction pipeline, the control portion causes the carriage to standby at the working position relative to the winding unit. If a state where a suction air flow based on the blower is generated again in the suction pipeline is reached, the yarn ends are recovered by the recovery portion via the suction pipeline.

[0007] In the yarn winding machine according to one aspect of the present invention, the first catching device has a first catching portion. The first catching portion sucks and simultaneously catches the yarn end of the first yarn by jetting compressed air. Thus, even in a state where no suction air flow based on the blower is generated in the suction pipeline, the first catching device can catch the first yarn and guide it to the yarn splicing device. The second catching device has at least one of a second catching portion and a function of blowing air onto the second yarn to catch the second yarn. Thus, even in a state where no suction air flow based on the blower is generated in the suction pipeline, the second catching device can catch the second yarn and guide it to the yarn splicing device. Therefore, in the yarn winding machine, even in a state where a cleaning operation of the recovery portion or the like is performed during the yarn splicing operation and no suction air flow based on the blower is generated in the suction pipeline, compressed air acts on the first yarn and the second yarn. Therefore, the yarn splicing operation can be performed. Thus, failure of the yarn splicing operation can be avoided in the yarn winding machine.

[0008] In addition, in a yarn winding machine, if a splicing operation is performed a specified number of times in a state where no suction air flow based on the blower is generated in the suction pipeline, the carriage is made to standby at the working position relative to the winding unit. In this way, in the yarn winding machine, the number of times of performing the splicing operation in a state where no suction air flow based on the blower is generated in the suction pipeline is limited to below the specified number. Therefore, there is no concern that a large amount of yarn ends generated by the splicing operation accumulate in the suction pipeline. Therefore, in the yarn winding machine, if the state becomes such that the suction air flow based on the blower is generated again in the suction pipeline, the yarn ends are recovered by the recovery unit through the suction pipeline, and the situation where the suction pipeline is blocked by the yarn ends does not occur. Therefore, in the yarn winding machine, even when the splicing operation is performed in a state where no suction air flow is generated in the suction pipeline, it is possible to avoid occurrence of defects related to the splicing operation.

[0009] In one embodiment, it may also be that the yarn winding machine is provided with a cutting device that cuts the yarn guided to the splicing device by the first catching device and the second catching device. The yarn ends of the yarn cut by the cutting device in a state where no suction air flow based on the blower is generated in the suction pipeline stay in the suction pipeline at the recovery position relative to the winding unit where the yarn ends are generated. If the state becomes such that the suction air flow based on the blower is generated again in the suction pipeline, the staying yarn ends are recovered by the recovery unit. In this structure, if the state becomes such that the suction air flow based on the blower is generated again in the suction pipeline, the yarn ends generated by the cutting of the yarn by the cutting device are automatically recovered by the recovery unit. Therefore, it is possible to avoid occurrence of defects such as the suction pipeline being blocked by the yarn ends.

[0010] In one embodiment, it may also be that if the splicing operation is performed a specified number of times in the same winding unit in a state where no suction air flow based on the blower is generated in the suction pipeline, the control unit makes the carriage standby at the working position relative to the winding unit. In this structure, even after no suction air flow based on the blower is generated in the suction pipeline, the splicing operation can be performed a specified number of times on one winding unit.

[0011] In one embodiment, the specified number may also be one. In this structure, since the carriage stands by when the splicing operation is performed once, it is possible to avoid the yarn ends accumulating in the suction pipeline.

[0012] In one embodiment, it is also possible that the second capturing device is provided in each of the plurality of winding units and has a function of blowing air onto the second yarn to capture the second yarn. In a state where no suction air flow is generated in the suction pipeline, when a yarn splicing operation is performed in one winding unit, the second yarn is captured by the second capturing device in other winding units that require the yarn splicing operation. In this structure, when the carriage is located at other winding units that require the yarn splicing operation, the second yarn has already been captured by the second capturing device. Therefore, the yarn splicing operation can be efficiently performed.

[0013] In one embodiment, it is also possible that when a state is reached where a suction air flow based on the blower is generated again in the suction pipeline, a feeding operation of feeding the yarn end into the suction pipeline is performed in the first capturing device and the second capturing device. In this structure, it is possible to prevent the yarn end from remaining in the first capturing device and the second capturing device.

[0014] In one embodiment, it is also possible that the yarn winding machine includes: a detection device that detects defects in the yarn; and a reverse rotation device that rotates the package in the direction opposite to the winding direction. In a state where no suction air flow based on the blower is generated in the suction pipeline, when the length of the defect in the yarn detected by the detection device is longer than a specified length, the reverse rotation device rotates the package by a rotation amount smaller than the rotation amount required to remove the defect in the opposite direction and then stops the rotation of the package. In a state where no suction air flow based on the blower is generated in the suction pipeline, if the package is rotated in the opposite direction to completely remove a so-called long defect, there is a risk that the yarn end will be wound around the suction pipeline. Therefore, in the above structure, the rotation of the package is stopped after rotating the package by a rotation amount smaller than the rotation amount required to remove the defect in the opposite direction. As a result, in a state where no suction air flow based on the blower is generated in the suction pipeline, not all of the long defect enters the suction pipeline. Therefore, it is possible to avoid problems such as the yarn end being entangled in the suction pipeline.

[0015] In one embodiment, it is also possible that an operation unit is provided, which switches between a first state in which a suction air flow based on the blower is generated in the suction pipeline and a second state in which no suction air flow based on the blower is generated in the suction pipeline. If an operation to switch to the second state is performed in the operation unit, the suction air flow immediately stops being generated in the suction pipeline. In this structure, since the first state and the second state can be immediately switched, there is no time required for the transition between the first state and the second state. Therefore, it is possible to shorten the standby time of the operator for the state switch.

[0016] According to one aspect of the present invention, even when the yarn splicing operation is performed in a state where no suction air flow is generated in the suction pipeline, it is possible to avoid the occurrence of defects related to the yarn splicing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a front view of a spinning machine as an embodiment.

[0018] Figure 2 is Figure 1 a side view of the spinning unit included in the spinning machine.

[0019] Figure 3 is a diagram showing the structure of the first catching part.

[0020] Figure 4 (A) of is a schematic structural diagram of the suction air flow supply mechanism. Figure 4 (B) of is a top view showing the rod provided in the first suction pipeline. Figure 4 (C) of is a cross-sectional view showing the gate provided in the first suction pipeline.

[0021] Figure 5 is a diagram for explaining the yarn splicing operation.

[0022] Figure 6 is a diagram for explaining the yarn splicing operation. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Hereinafter, the embodiments will be described in detail with reference to the drawings. In addition, in the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and repeated description is omitted. "Upstream" and "downstream" refer to upstream and downstream in the traveling direction of the yarn during spinning. The dimensional ratios in the drawings do not necessarily match the dimensional ratios described.

[0024] As Figure 1 shown, a spinning machine (yarn winding machine) 1 includes a main frame 2A, a first end frame 4, a second end frame 5, a yarn splicing carriage (carriage) 3, a doffing carriage (not shown), and a suction air flow supply mechanism 50. The first end frame 4, the main frame 2A, and the second end frame 5 are arranged in one direction. On the main frame 2A, a plurality of spinning units (winding units) 2 that generate a yarn Y and wind it into a package P, and a first suction pipeline 51 and a second suction pipeline 52, etc., which are part of the suction air flow supply mechanism 50 described later, are arranged. On the main frame 2A, the plurality of spinning units 2 are arranged in one direction.

[0025] A part of the first suction pipeline 51, a part of the second suction pipeline 52, a blower 55, a recovery box 58, etc. are arranged on the first end frame 4. The first end frame 4 is arranged at one end of the arrangement direction of the plurality of spinning units 2.

[0026] The air pressure regulating section, drive motor, etc. are accommodated in the second end frame 5. The air pressure regulating section is provided to regulate the air pressure of the compressed air (air) supplied from an air pressure feeding device (not shown) disposed in the fiber factory where the spinning machine 1 is installed and supply the air to various parts of the spinning machine 1. The drive motor is provided to supply power to various parts of the spinning unit 2.

[0027] A machine controller (control section) 15 and an input device 18 are provided in the second end frame 5. The machine controller 15 centrally manages and controls various parts of the spinning machine 1. The machine controller 15 has an input / output interface for signal input / output with the outside, a ROM (Read Only Memory) that stores programs and information for processing, a storage section such as a RAM (Random Access Memory) that temporarily stores data, a CPU (Central Processing Unit), a communication circuit, etc. The machine controller 15 stores the input data in the RAM based on the signal output from the CPU, loads the program stored in the ROM into the RAM, and executes the program loaded into the RAM, thereby performing various processes.

[0028] The input device 18 has a display screen 16 and input keys 17. The display screen 16 can display information related to at least any one of the setting content and state of the spinning unit 2. An operator can perform the setting operation of the spinning unit 2 by appropriately operating the input keys 17. When the display screen 16 is constituted by a touch panel display, the display screen 16 and the input keys 17 are integrally constituted. In the input device 18, the spinning conditions in the air spinning device 7 can be set via the display screen 16 or the input keys 17. The spinning conditions include the type of yarn, the thickness of the yarn, the spinning speed, etc. The machine controller 15 controls various parts of the spinning machine 1 based on such spinning conditions.

[0029] As Figure 1 and Figure 2 shown, each spinning unit 2 successively includes a drafting device 6, an air spinning device (yarn feeding device) 7, a yarn monitoring device (detection device) 8, a tension sensor 9, a yarn storage device 11, a waxing device 12, a suction device (second catching device) 13, and a winding device 14 in the traveling direction of the yarn Y from the upstream side. The drafting device 6, the air spinning device 7, the yarn monitoring device 8, the tension sensor 9, the yarn storage device 11, the waxing device 12, the suction device 13, and the winding device 14 are fixed to the main frame 2A. Unit controllers (control sections) 10 are provided for every prescribed number of spinning units 2 and control the operations of the spinning units 2. In addition, the unit controller 10 may be provided in each spinning unit 2.

[0030] The drafting device 6 drafts the sliver S. The drafting device 6 successively has a back roller pair, a third roller pair, an intermediate roller pair, and a front roller pair in the traveling direction of the sliver S from the upstream side. Each roller pair has a bottom roller and a top roller. The bottom roller is rotationally driven by a drive motor (not shown) provided on the second end frame 5 or a drive motor (not shown) provided on each drafting device 6.

[0031] The air spinning device 7 twists the fiber bundle F drafted by the drafting device 6 by means of a swirling flow of air to generate a yarn Y. The air spinning device 7 supplies the generated yarn Y downstream. More specifically (not shown), the air spinning device 7 has a spinning chamber, a fiber guiding portion, a swirling air flow generating nozzle, and a hollow guiding shaft body. The fiber guiding portion guides the fiber bundle F supplied from the upstream drafting device 6 into the spinning chamber. The swirling air flow generating nozzle is arranged around the path along which the fiber bundle F travels. A swirling air flow is generated in the spinning chamber by jetting air from the swirling air flow generating nozzle. By means of this swirling air flow, the respective fiber ends of the multiple fibers constituting the fiber bundle F reverse and swirl. The hollow guiding shaft body guides the yarn Y from inside the spinning chamber to the outside of the air spinning device 7.

[0032] The yarn monitoring device 8 monitors the state of the traveling yarn Y between the air spinning device 7 and the yarn storage device 11. The yarn monitoring device 8 monitors the state of the traveling yarn Y and detects the presence or absence of a yarn defect based on the monitored information. When the yarn monitoring device 8 detects a yarn defect, it sends a yarn defect detection signal to the unit controller 10. When the unit controller 10 receives the yarn defect detection signal from the yarn monitoring device 8, it cuts off the yarn Y by stopping the operation of the air spinning device 7. The cutting of the yarn Y can also be achieved by stopping the drafting (rotation of the back roller pair) based on the drafting device 6.

[0033] The tension sensor 9 measures the tension of the traveling yarn Y between the air spinning device 7 and the yarn storage device 11 and sends a measurement signal to the unit controller 10.

[0034] The yarn storage device 11 stores the yarn Y between the air spinning device 7 and the winding device 14. The yarn storage device 11 has the functions of: stably drawing out the yarn Y from the air spinning device 7; retaining the yarn Y sent out from the air spinning device 7 to prevent the yarn Y from slackening during the yarn splicing operation of the yarn splicing carriage 3, etc.; and adjusting the tension of the yarn Y on the winding device 14 side to prevent the change in the tension of the yarn Y on the winding device 14 side from being transmitted to the air spinning device 7 side. The yarn storage device 11 includes a yarn storage roller 11A, a yarn hanging member 11B, and a storage amount sensor (not shown).

[0035] The waxing device 12 waxes the yarn Y between the yarn storage device 11 and the winding device 14.

[0036] When the yarn Y is broken between the air spinning device 7 and the winding device 14, the suction device 13 sucks the yarn Y2 on the bobbin P side. The suction device 13 is provided between the yarn storage device 11 and the winding device 14. In the present embodiment, the suction device 13 is fixedly provided on the main frame 2A. The suction device 13 may also be provided in a movable manner. For example, the suction device 13 may be configured to be movable in a direction approaching and retracting with respect to the yarn path. When the splicing cart 3 operates on the spinning unit 2, the suction device 13 is located upstream of the splicing device 26 provided in the splicing cart 3. When the yarn Y is broken, the suction device 13 can capture the yarn Y2 on the winding device 14 side, that is, the bobbin P side, upstream of the splicing device 26.

[0037] The suction device 13 includes a suction portion 19, a gate 20 for switching the connection with a first suction pipeline 51 (described later) (presence or absence of suction in the suction portion 19), a jet portion 21, and a yarn capture detection sensor 22. A suction port 19A is provided in the suction portion 19. The suction portion 19 is connected to the first suction pipeline 51. The opening and closing operation of the gate 20 is controlled by the unit controller 10.

[0038] The jet portion 21 jets compressed air toward the suction portion 19. The jet portion 21 is arranged at a position where it can jet compressed air toward the suction port 19A of the suction portion 19. The jet portion 21 jets compressed air onto the path of the yarn Y, blows the compressed air onto the yarn Y, and thus presses the yarn Y into the suction portion 19. By jetting compressed air from the jet portion 21, a delivery force different from the suction force of the suction air flow generated in the first suction pipeline 51 acts on the suction device 13. The jet portion 21 is connected to a compressed air source (not shown). The supply of compressed air from the jet portion 21 is controlled by the unit controller 10.

[0039] The yarn capture detection sensor 22 is arranged on the immediate downstream side of the suction portion 19 (suction port 19A) of the suction device 13. The yarn capture detection sensor 22 can detect whether the suction device 13 successfully captures the yarn Y2 on the bobbin P side. The yarn capture detection sensor 22 detects whether there is a yarn Y2 on the immediate downstream side of the suction device 13 and sends a detection signal to the unit controller 10. The unit controller 10 can detect whether the capture by the suction device 13 is successful based on the detection signal from the yarn capture detection sensor 22. The yarn capture detection sensor 22 may also be provided inside the suction portion 19.

[0040] The winding device 14 winds the yarn Y around the bobbin B to form a package P. The winding device 14 has a cradle arm 23, a winding cylinder 24, and a traverse guide 25. The cradle arm 23 supports the bobbin B rotatably. The cradle arm 23 is supported by a support shaft 23A swingably. When the bobbin B (package P) is rotated in the winding direction (forward rotation), the cradle arm 23 brings the surface of the bobbin B or the surface of the package P into contact with the surface of the winding cylinder 24 with appropriate pressure. The drive motors provided on the second end frame 5 drive the winding cylinders 24 of the plurality of spinning units 2 together. Thereby, in each spinning unit 2, the bobbin B or the package P is rotated in the winding direction.

[0041] The traverse guides 25 of the respective spinning units 2 are provided on a shaft shared by the plurality of spinning units 2. By reciprocally driving the shaft in the rotation axis direction of the winding cylinder 24 by the drive motor of the second end frame 5, the traverse guide 25 causes the yarn Y to traverse relative to the rotating bobbin B or package P by a specified amplitude.

[0042] When the yarn Y is cut or the yarn Y breaks for some reason in one spinning unit 2, the yarn splicing carriage 3 performs a yarn splicing operation on that spinning unit 2. For example, a plurality of yarn splicing carriages 3 are provided in the spinning machine 1. The yarn splicing carriage 3 is provided so as to be movable relative to the plurality of spinning units 2 and moves along the arrangement direction of the spinning units 2 ( Figure 1 the left - right direction in the figure). The yarn splicing carriage 3 can move to the working position (the position where the yarn splicing operation is performed) relative to each of the plurality of spinning units 2.

[0043] The yarn splicing carriage 3 has a yarn splicing device 26, a suction nozzle (first capturing device) 27, a suction port (second capturing device) 28, a reverse device 29, and a carriage controller (control unit) 32.

[0044] When the yarn Y is in a broken state between the air spinning device 7 and the winding device 14, the yarn splicing device 26 performs a yarn splicing operation for making the yarn Y into a continuous state. The yarn splicing device 26 includes a clamping device (not shown), a cutter (cutting device) 26A, and a yarn gathering rod (not shown). The yarn splicing device 26 retracts the yarn (first yarn) Y1 captured by the suction nozzle 27 (refer to Figure 6 ) by operating the yarn gathering rod, and holds and cuts it using the clamping device and the cutter 26A. The yarn splicing device 26 retracts the yarn (second yarn) Y2 captured by the attracting device 13 or the suction port 28 (refer to Figure 6 ) by operating the yarn gathering rod, and holds and cuts it using the clamping device and the cutter 26A.

[0045] The yarn splicing device 26 splices the yarn Y2 on the winding device 14 side after cutting and the yarn Y1 on the air spinning device 7 side after cutting. The yarn splicing device 26 is a splicer using compressed air or a knotter that mechanically connects the yarns Y to each other. In the present embodiment, a splicer will be described as an example. In the present embodiment, the yarn splicing device 26 can move in a direction approaching the path of the traveling yarn Y (to the left in the example of Figure 2 or in a direction away from it (to the right in the example of Figure 2 ). The yarn splicing device 26 may also be arranged in such a way that it cannot approach / retreat relative to the path of the yarn Y.

[0046] The yarn suction nozzle 27 is supported by a support shaft 27a so as to be rotatable, captures the yarn Y on the air spinning device 7 side and guides it to the yarn splicing device 26. The yarn suction nozzle 27 sucks the yarn Y supplied from the air spinning device 7 when capturing the yarn Y. The suction air flow during suction in the yarn suction nozzle 27 is supplied from the second suction pipeline 52. The yarn suction nozzle 27 is arranged to be movable to a standby position, a first yarn capture position for capturing the yarn Y supplied from the air spinning device 7, and a first yarn guiding position for guiding the yarn Y to the yarn splicing device 26. The standby position and the first yarn guiding position may also be the same position. The movement (rotation) of the yarn suction nozzle 27 is controlled by the carriage controller 32.

[0047] As Figure 3 shown, the yarn suction nozzle 27 has a first capture portion 33. The first capture portion 33 is provided at the tip of the yarn suction nozzle 27. The first capture portion 33 attracts and simultaneously captures the yarn end of the yarn Y1 by jetting compressed air. The first capture portion 33 has a nozzle member 34. The nozzle member 34 is configured in a cylindrical shape, and an inhalation passage 35 with a circular cross-section is formed inside it. One end of the inhalation passage 35 is connected to a suction port 34A formed on the top surface of the nozzle member 34.

[0048] The inhalation passage 35 is configured as a stepped passage, and has a small-diameter portion 35A formed in a portion close to the suction port 34A and a large-diameter portion 35B connected to the small-diameter portion 35A. The flow cross-sectional area of the large-diameter portion 35B is larger than that of the small-diameter portion 35A. Inside the nozzle member 34, annular first air chambers 36A and second air chambers 36B are respectively formed so as to surround the inhalation passage 35. A compressed air pipe 39A is connected to the first air chamber 36A. A compressed air pipe 39B is connected to the second air chamber 36B. Compressed air can be supplied from a compressed air source (not shown) to the first air chamber 36A and the second air chamber 36B.

[0049] A jet nozzle (introduction nozzle) 37 for injecting compressed air into the suction passage 35 is connected to the first air chamber 36A. The jet nozzle 37 is formed as an annular nozzle with a triangular cross-section, and its cross-sectional profile is tapered as it approaches the inner suction passage 35. The tip of the jet nozzle 37 is formed as a jet outlet on the inner wall of the suction passage 35 (large-diameter portion 35B). The jet nozzle 37 is configured to be able to eject compressed air from this jet outlet into the suction passage 35.

[0050] The jet outlet of the jet nozzle 37 is formed in an annular shape, and air is ejected over the entire circumference of the jet nozzle 37. The jet nozzle 37 is appropriately inclined and arranged so as to be able to form an inclined air flow toward the base end side of the yarn suction nozzle 27. In this structure, by injecting compressed air from the first air chamber 36A into the suction passage 35 at high speed via the jet nozzle 37, a pressure drop (jet effect) can be generated by the well-known Venturi effect, and an attracting air flow toward the base end side of the yarn suction nozzle 27 can act on the suction port 34A.

[0051] A plurality of twisting nozzles 38 for injecting compressed air into the suction passage 35 are connected to the second air chamber 36B. The twisting nozzles 38 are arranged at equal intervals around the suction passage 35, and jet outlets are respectively formed on the inner wall of the suction passage 35. In addition, for the convenience of explanation using a cross-sectional view, in Figure 3 it is depicted that the twisting nozzles 38 extend in the radial direction, but the actual orientation of the twisting nozzles 38 is in the tangential direction of the circular suction passage 35.

[0052] In the first catching portion 33, by injecting compressed air from the second air chamber 36B into the suction passage 35 via the twisting nozzles 38, a swirling air flow is generated in the suction passage 35. The yarn Y1 introduced into the suction passage 35 of the first catching portion 33 is twisted under the action of the swirling air flow generated in the portion of the twisting nozzles 38 and is introduced toward the base portion side of the yarn suction nozzle 27.

[0053] When the yarn splicing operation starts, compressed air is supplied from the compressed air pipes 39A and 39B, a swirling air flow is generated in the suction passage 35, and the first catching portion 33 attracts and catches the yarn Y1. When the yarn suction nozzle 27 guides the yarn Y1 to the yarn splicing device 26, the first catching portion 33 stops supplying compressed air from the compressed air pipes 39A and 39B.

[0054] As Figure 2As shown, the yarn suction port 28 is supported by a support shaft 28a in a rotatable manner, approaches the winding device 14 to capture the yarn Y on the winding device 14 side, and moves away from the winding device 14 to guide the captured yarn Y to the yarn splicing device 26. The suction air flow during suction in the yarn suction port 28 is supplied from the second suction pipeline 52. The yarn suction port 28 is configured to be movable to a standby position, a second yarn capture position for capturing the yarn Y from the winding device 14, and a second yarn guiding position for guiding the yarn Y to the yarn splicing device 26. The standby position and the second yarn guiding position may be the same position. The movement (rotation) of the yarn suction port 28 is controlled by the carriage controller 32. The yarn suction port 28 has a second capture portion 40. The second capture portion 40 is provided at the tip of the yarn suction port 28. The second capture portion 40 sucks and simultaneously captures the yarn end of the yarn Y2 by jetting compressed air.

[0055] The suction air flow is supplied to the splicing carriage 3 via a second suction pipeline 52 provided in the range from the first end frame 4 to the main frame 2A. A plurality of supply ports 52a are formed on the second suction pipeline 52. Each supply port 52a is formed at a position corresponding to each spinning unit 2 in the second suction pipeline 52 for supplying the suction air flow to the splicing carriage 3. A plurality of gates (not shown) are provided on the second suction pipeline 52 corresponding to the respective supply ports 52a. The gates open and close the respective supply ports 52a according to the contact of the tip 41a of the carriage side pipeline 41 provided on the splicing carriage 3. That is, the gates open and close the respective supply ports 52a in linkage with the movement of the splicing carriage 3. In a state where the splicing carriage 3 stops at the working position, the corresponding supply port 52a is not closed by the gate, and the yarn suction nozzle 27 and the yarn suction port 28 of the splicing carriage 3 are connected to the second suction pipeline 52 via the carriage side pipeline 41.

[0056] The reversing device 29 reverses the package P of the winding device 14. The reversing device 29 has a support arm 30 and a reversing roller 31. One end of the support arm 30 is connected to a support shaft. Thus, the support arm 30 is configured to be swingable about the support shaft. The support arm 30 moves to a retracted position where the reversing roller 31 does not contact the package P and a contact position where the reversing roller 31 contacts the package P by a driving portion (not shown) such as a motor. The swing of the support arm 30 is controlled by the carriage controller 32.

[0057] The reversing roller 31 is provided at the other end of the support arm 30. The reversing roller 31 rotates (reverses) the package P in the direction opposite to the winding direction, i.e., the unwinding direction. When rotating the package P in the unwinding direction, the cradle arm 23 separates (raises) the surface of the package P from the surface of the winding cylinder 24, and the splicing carriage 3 brings the reversing roller 31 into contact with the surface of the package P. Thus, the package P that the reversing roller 31 can contact can be rotated in the unwinding direction. The rotation of the reversing roller 31 is controlled by the carriage controller 32.

[0058] The carriage controller 32 uniformly controls the operations of the yarn splicing carriage 3. The carriage controller 32 has an input / output interface for signal input / output with the outside, a ROM that stores programs and information for processing, a storage section such as a RAM for temporarily storing data, a CPU, a communication circuit, etc. The carriage controller 32 stores input data in the RAM based on the signal output by the CPU, loads the program stored in the ROM into the RAM, and executes the program loaded into the RAM, thereby performing various processes. The carriage controller 32 can communicate with the unit controller 10 and the machine frame controller 15.

[0059] The carriage controller 32 controls the yarn splicing operation performed by the yarn splicing carriage 3 and the movement of the yarn splicing carriage 3. The carriage controller 32 is connected to the unit controller 10. At an appropriate timing after the yarn monitoring device 8 of a certain spinning unit 2 detects a yarn defect, the unit controller 10 sends a yarn splicing request signal to the machine frame controller 15. The machine frame controller 15 that receives the yarn splicing request signal sends a control signal to the carriage controller 32. Thereby, the yarn splicing carriage 3 can perform a yarn splicing operation on the spinning unit 2 that has sent the yarn splicing request signal.

[0060] The differential use of the suction device 13 and the yarn suction port 28 in the case of performing a yarn splicing operation in the spinning machine 1 will be described. In the present embodiment, there are two types of yarn splicing operations: "fixed capture yarn splicing" and "moving capture yarn splicing", and the suction device 13 and the yarn suction port 28 are selected in an either-or manner. The machine frame controller 15 determines which of the fixed capture yarn splicing and the moving capture yarn splicing to perform based on various factors in the case of interrupting spinning.

[0061] In the fixed capture yarn splicing operation, the yarn Y2 on the winding device 14 side is captured by the suction device 13, and the yarn splicing is performed by the yarn splicing device 26. In the moving capture yarn splicing operation, the yarn Y2 on the winding device 14 side is captured by the yarn suction port 28, and the yarn suction port 28 guides the yarn Y2 so that the yarn splicing device 26 can take in the yarn Y2, and then the yarn splicing is performed by the yarn splicing device 26.

[0062] In either the fixed capture yarn splicing or the moving capture yarn splicing operation, the yarn Y1 on the air spinning device 7 side is captured by the yarn suction nozzle 27, and the yarn suction nozzle 27 guides the yarn Y1 so that the yarn splicing device 26 can take in the yarn Y1.

[0063] For example, consider the case where the yarn monitoring device 8 detects a yarn defect and the yarn Y is cut to remove the yarn defect. Assume that in the case of performing fixed capture yarn splicing, it is necessary to stop the rotation of the package P in a state where the yarn end of the yarn Y on the package P side is captured by the suction device 13. When the yarn retention amount of the yarn retention roller 11A at the time of detecting the yarn defect is equal to or more than a specified amount, it is determined to perform fixed capture yarn splicing.

[0064] When the amount of yarn retained by the yarn retaining roller 11A is less than the specified amount, the attracting device 13 is too late to catch the yarn Y, and the yarn end will pass through the attracting device 13 due to the rotation until the package P actually stops. In this case, the machine controller 15 determines to perform a moving catch and splice. When the yarn Y is cut at a position downstream of the attracting device 13 due to abnormal tension or the like generated during the winding of the package P, the machine controller 15 also determines to perform a moving catch and splice.

[0065] The above description is an example of the judgment on which of the fixed catch and splice and the moving catch and splice to perform, and the judgment can also be made based on other criteria.

[0066] When the package P becomes full in a certain spinning unit 2, the doffing carriage doffs the package P and supplies a new yarn bobbin B to the spinning unit 2.

[0067] As Figure 1 and Figure 4 shown in (A) of, the suction air flow supply mechanism 50 supplies a suction air flow to the attracting device 13 provided in the spinning unit 2, and the suction nozzles 27 and the suction ports 28 provided in the splicing carriage 3. The suction air flow supply mechanism 50 includes a first suction pipeline 51, a second suction pipeline 52, a blower 55, and a recovery box (recovery unit) 58.

[0068] The attracting devices 13 of a plurality of spinning units 2 are connected to the first suction pipeline 51. The first suction pipeline 51 extends in the arrangement direction of the spinning units 2. The first suction pipeline 51 is, for example, a square pipe member with a quadrilateral inner cross-section. The suction nozzles 27 and the suction ports 28 are connected to the second suction pipeline 52. The second suction pipeline 52 extends in the arrangement direction of the spinning units 2. The second suction pipeline 52 is, for example, a square pipe member with a quadrilateral inner cross-section. In the present embodiment, the end portion (the portion on the blower 55 side) of the second suction pipeline 52 converges with the end portion (the portion on the blower 55 side) of the first suction pipeline 51.

[0069] The blower 55 generates a suction air flow. The blower 55 is driven by a blower motor 55M. The blower 55 is connected to one end portion of the first suction pipeline 51 and one end portion of the second suction pipeline 52 via the recovery box 58. The suction port 55A of the blower 55 is connected to the first suction pipeline 51 and the second suction pipeline 52. The blower 55 causes a suction air flow to be generated in the first suction pipeline 51 and the second suction pipeline 52. The discharge port 55B of the blower 55 is connected to a sub-pipeline (not shown).

[0070] The recovery box 58 uses a filter (not shown) to recover lint from the suction airflow flowing from the suction device 13 through the first suction duct 51, and from the suction airflow flowing from the yarn suction nozzle 27 and the yarn suction port 28 of the yarn splicing carriage 3 through the second suction duct 52. The recovery box 58 is provided with an openable and closable door 59. The recovered lint is stored in the recovery box 58 and removed by a worker through the door 59 under specified conditions. Furthermore, the recovery box 58 is provided with a static pressure sensor 58A for detecting the static pressure of the suction airflow within the recovery box 58.

[0071] like Figure 4 As shown in (B), in this embodiment, a lever (operating portion) 57 is provided on the outer surface of the end portion of the first suction duct 51 (the portion closer to the recovery box 58 than the confluence position of the second suction duct 52). The lever 57 is rotatably supported by a support shaft 57A that passes through the first suction duct 51. A plate-shaped gate 57B is installed on the portion of the support shaft 57A that is located inside the first suction duct 51. Thus, when the operator rotates the lever 57, the gate 57B rotates in conjunction with it, allowing or prohibiting the circulation of the suction air flow relative to the first suction duct 51 and the second suction duct 52.

[0072] The lever 57 functions as a switching unit for switching the suction air flow mode relative to the first suction duct 51 and the second suction duct 52 to a circulation mode (first state) or a stop mode (second state). The circulation mode is a mode for allowing the suction air flow to circulate relative to the first suction duct 51 and the second suction duct 52. Figure 4 As shown in (C), in the circulation mode, the gate 57B is configured to be parallel to the circulation direction of the suction air flow in the first suction duct 51, and the gate 57B allows the suction air flow to circulate relative to the first suction duct 51. The stop mode is a mode for stopping the circulation of the suction air flow relative to the first suction duct 51 and the second suction duct 52. In the stop mode, the gate 57B is configured to be perpendicular to the circulation direction of the suction air flow in the first suction duct 51, and the gate 57B immediately prohibits the suction air flow from circulating relative to the first suction duct 51. That is, in the stop mode, the suction air flow is no longer generated in the first suction duct 51 immediately. Immediately means approximately simultaneously with the operation of the lever 57.

[0073] A proximity sensor 57C is provided in the first suction line 51 to detect the movement of the rod 57 or the movement of at least a portion of the portion that moves in conjunction with the rod 57. The proximity sensor 57C detects a first rod movement and a second rod movement of the rod 57. The first rod movement is the movement of the rod 57 when the rod 57 is switched from the circulation mode to the stop mode. The second rod movement is the movement of the rod 57 when the rod 57 is switched from the stop mode to the circulation mode. The proximity sensor 57C is configured to detect the first rod movement at a position where the rod 57 has rotated approximately 10° when the rod 57 is switched from the circulation mode to the stop mode.

[0074] Next, the operation of the spinning machine 1 will be described. The yarn joining operation using the suction device 13 of the spinning unit 2 and the suction nozzle 27 of the yarn joining carriage 3 will be described as an example. Furthermore, the case where a yarn defect is detected and the yarn Y is cut will be described.

[0075] If the yarn monitoring device 8 detects a yarn defect during the winding process of the yarn Y, it transmits a yarn defect detection signal to the unit controller 10. Upon receiving the yarn defect detection signal, the unit controller 10 stops the supply of air to the air spinning device 7, interrupting the production of the yarn Y and cutting the yarn Y. The yarn defect detected by the yarn monitoring device 8 is contained in the yarn Y2 on the package P side.

[0076] Next, the unit controller 10 performs deceleration control of the rotation of the package P. Furthermore, the unit controller 10 decelerates the rotation of the yarn pooling roller 11A of the yarn pooling device 11. The deceleration of the rotation of the yarn pooling roller 11A is preferably performed simultaneously with the deceleration of the rotation of the package P, but may be performed later than the deceleration of the rotation of the package P.

[0077] As the winding device 14 proceeds, the yarn Y remaining on the yarn accumulation roller 11A of the yarn accumulation device 11 is drawn out, and the amount of the yarn Y accumulated on the yarn accumulation roller 11A decreases. Figure 5 As shown, the unit controller 10 opens the gate 20 of the suction device 13 at a predetermined timing and activates the jet portion 21 of the suction device 13, thereby starting suction of the yarn Y2 by the suction device 13. The unit controller 10 stops winding by the winding device 14 substantially simultaneously with the start of suction by the suction device 13.

[0078] The unit controller 10 sends a yarn splicing request signal to the machine controller 15 at an appropriate time. Upon receiving the yarn splicing request signal, the machine controller 15 sends a control signal to the carriage controller 32. The carriage controller 32 then causes the yarn splicing carriage 3 to move to the spinning unit 2 that sent the yarn splicing request signal and stops the yarn splicing carriage 3 at its operating position relative to the spinning unit 2.

[0079] The unit controller 10 detects whether the capture of the attracting device 13 is successful based on the detection signal from the yarn capture detection sensor 22. It is possible that, when the successful capture of the attracting device 13 is detected, the carriage controller 32 operates the reversing device 29 to cause the attracting device 13 to attract the yarn Y2 of the length required to remove the yarn defect.

[0080] In addition, the carriage controller 32 rotates the yarn suction nozzle 27 to position the first capture portion 33 between the air spinning device 7 and the yarn storage device 11. An attracting air flow is generated at the first capture portion 33 of the yarn suction nozzle 27 substantially simultaneously with the rotational movement of the yarn suction nozzle 27, and air is ejected from the air spinning device 7. When air is ejected from the air spinning device 7, the yarn end of the yarn Y1 is sent out of the air spinning device 7 by the air pressure. Thus, the yarn suction nozzle 27 can capture the yarn Y1.

[0081] As Figure 6 shown, when the yarn suction nozzle 27 captures the yarn Y1, the unit controller 10 rotates the yarn suction nozzle 27 downward while continuing the attraction, thereby guiding the yarn Y1 to the yarn splicing device 26 while pulling it out from the air spinning device 7. When the guiding of the yarn Y1 to the yarn splicing device 26 is completed, the yarn Y1 between the air spinning device 7 and the yarn suction nozzle 27 engages with the yarn hanging member 11B of the yarn storage device 11, and the winding of the yarn Y1 around the yarn storage roller 11A starts. After that, the unit controller 10 stops the ejection of air from the twisting nozzle 38.

[0082] After that, the unit controller 10 starts the yarn splicing based on the yarn splicing device 26. The yarn splicing device 26 takes in the yarn Y1 and the yarn Y2 by operating the yarn gathering rod. In addition, the yarn splicing device 26 cuts a part of the yarn Y1 and a part of the yarn Y2 using the cutter 26A. The cut yarn ends are recovered by the recovery box 58 via the first suction pipeline 51 and the second suction pipeline 52. After the cutting by the cutter 26A, the yarn splicing device 26 splices the yarn Y1 and the yarn Y2. Thus, the yarn splicing operation is completed. When the yarn splicing operation is completed, the unit controller 10 restarts the winding of the yarn Y in the winding device 14.

[0083] In the spinning machine 1, during the execution of the above yarn splicing operation, if the yarn splicing operation is executed a specified number of times in a state where the suction air flow based on the blower 55 no longer occurs in the first suction pipeline 51 and the second suction pipeline 52, the carriage controller 32 causes the yarn splicing carriage 3 to standby at the working position relative to the spinning unit 2. When the static pressure value as the detection result of the static pressure sensor 58A is equal to or lower than a specified value, or when the state of the spinning machine 1 becomes the stop mode by the operation of the lever 57 (when the action of the lever 57 is detected by the proximity sensor 57C), the machine controller 15 determines that it is a state where the suction air flow based on the blower 55 no longer occurs in the first suction pipeline 51 and the second suction pipeline 52.

[0084] In the present embodiment, if a yarn splicing carriage 3 executes a yarn splicing operation on a spinning unit 2 once, the yarn splicing carriage 3 is caused to standby at the working position relative to the spinning unit 2. That is, in the present embodiment, the specified number of times is once. The specified number of times is a number that can be arbitrarily set. In the present embodiment, the spinning machine 1 is provided with a plurality of yarn splicing carriages 3. As the specified number of times, different numbers can be set for each yarn splicing carriage 3, or the same number can be set. When a plurality of times (for example, three times) are set as the specified number of times, if a yarn splicing carriage 3 executes a plurality of yarn splicing operations on a spinning unit 2 (the same spinning unit 2), the yarn splicing carriage 3 is caused to standby at the working position relative to the spinning unit 2.

[0085] The so-called execution of the yarn splicing operation means that a series of operations until the yarn splicing is completed are executed by capturing the yarn Y by using the suction device 13 and the yarn suction nozzle 27 and guiding it to the yarn splicing device 26, and performing yarn splicing by using the yarn splicing device 26. For example, the failure of the suction device 13 to capture the yarn Y1 is not counted as a yarn splicing operation. That is, for example, even if the suction device 13 fails to capture the yarn Y1 twice, the specified number of times is not two. In other words, when the suction device 13 fails to capture the yarn Y1 twice and the next capture is successful and yarn splicing is performed, the specified number of times is counted as one. In addition, it may be that when the capture failure of the suction device 13 or the yarn suction nozzle 27 continues for three times, for example, the yarn splicing operation is stopped and this situation is notified.

[0086] The yarn ends generated due to the execution of the yarn splicing operation remain in the first suction pipeline 51 and the second suction pipeline 52. In the spinning machine 1, if the state where the suction air flow based on the blower 55 is generated again in the first suction pipeline 51 and the second suction pipeline 52 is reached, the yarn ends are recovered by the recovery box 58 via the first suction pipeline 51 and the second suction pipeline 52.

[0087] In addition, in the spinning machine 1, when the state is such that the suction air flow based on the blower 55 no longer occurs in the first suction pipe 51 and the second suction pipe 52, if a piecing operation is required in a spinning unit 2 other than the spinning unit 2 that is the object of the piecing operation (the spinning unit 2 where the piecing carriage 3 is not located at the working position), the yarn Y2 is captured by the suction device 13 in the other spinning unit 2. In this case, in the spinning machine 1, when the state is such that the suction air flow based on the blower 55 occurs again in the first suction pipe 51 and the second suction pipe 52, the piecing carriage 3 travels to the other spinning unit 2 and the piecing operation is performed in this spinning unit 2.

[0088] When the state is such that the suction air flow based on the blower 55 occurs again in the first suction pipe 51 and the second suction pipe 52, the carriage controller 32 performs a sending operation of sending the yarn end out to the second suction pipe 52 in the suction nozzle 27 (the first capturing portion 33). Specifically, the piecing carriage 3 sprays compressed air in the suction nozzle 27 regardless of the piecing operation while maintaining the stop at the stopped working position. As a result, even if there is a yarn end remaining in the suction nozzle 27, the yarn end is blown into the second suction pipe 52. When the static pressure value as the detection result of the static pressure sensor 58A is greater than a specified value, or when the state of the spinning machine 1 becomes the circulation mode by the operation of the lever 57 (when the operation of the lever 57 is not detected by the proximity sensor 57C), the machine controller 15 determines that the state is such that the suction air flow based on the blower 55 occurs again in the first suction pipe 51 and the second suction pipe 52.

[0089] When the state is such that the suction air flow based on the blower 55 occurs again in the first suction pipe 51 and the second suction pipe 52, the unit controller 10 operates the ejection portion 21 of the suction device 13 to send the yarn end out to the first suction pipe 51. The sending operation can be performed in both the suction nozzle 27 and the suction device 13, or can be performed only in either one of them.

[0090] In the state where the suction air flow based on the blower 55 no longer occurs in the first suction pipe 51 and the second suction pipe 52, when the length of the defect of the yarn Y detected by the yarn monitoring device 8 is longer than a specified length, the reversing device 29 rotates the package P by a rotation amount smaller than the rotation amount of the package P in the reverse direction required to remove the defect, and then stops the rotation of the package P. The specified length can be appropriately set. The carriage controller 32 obtains the length of the yarn defect based on the detection result of the yarn monitoring device 8.

[0091] In the spinning machine 1, when the suction air flow based on the blower 55 no longer occurs in the first suction pipeline 51 and the second suction pipeline 52, and when the length of the defect of the yarn Y detected by the yarn monitoring device 8 is longer than the specified length, the yarn splicing operation is not performed. In the spinning machine 1, when the state is such that the suction air flow based on the blower 55 occurs again in the first suction pipeline 51 and the second suction pipeline 52, the carriage controller 32 controls the reversing device 29 to reverse the package P by the amount of rotation of the package P required to remove the defect, and the yarn splicing operation is performed.

[0092] As described above, in the spinning machine 1 of the present embodiment, the yarn suction nozzle 27 has the first catching portion 33. The first catching portion 33 sucks and simultaneously catches the yarn end of the yarn Y1 by jetting compressed air. Thus, even when the suction air flow based on the blower 55 no longer occurs in the second suction pipeline 52, the yarn suction nozzle 27 can catch the yarn Y1 and guide it to the yarn splicing device 26. The yarn suction port 28 has the second catching portion 40. In addition, the suction device 13 has the jetting portion 21. Thus, even when the suction air flow based on the blower 55 no longer occurs in the first suction pipeline 51 and the second suction pipeline 52, the yarn suction port 28 and the suction device 13 can catch the yarn Y2 and guide it to the yarn splicing device 26. Therefore, in the spinning machine 1, even when the cleaning operation of the collection box 58 is performed during the yarn splicing operation and the suction air flow based on the blower 55 no longer occurs in the first suction pipeline 51 and the second suction pipeline 52, the compressed air acts on the yarn Y1 and the yarn Y2. Therefore, the yarn splicing operation can be performed. Thus, the failure of the yarn splicing operation can be avoided in the spinning machine 1.

[0093] In addition, in the spinning machine 1, when the yarn splicing operation is performed a specified number of times in the state where the suction air flow based on the blower 55 no longer occurs in the first suction pipeline 51 and the second suction pipeline 52, the yarn splicing carriage 3 is made to standby at the working position relative to the spinning unit 2. Thus, in the spinning machine 1, the number of times of performing the yarn splicing operation in the state where the suction air flow based on the blower 55 no longer occurs in the first suction pipeline 51 and the second suction pipeline 52 is limited to less than the specified number of times. Therefore, there is no concern that a large amount of yarn ends generated by the yarn splicing operation accumulate in the first suction pipeline 51 and the second suction pipeline 52. Therefore, in the spinning machine 1, when the state is such that the suction air flow based on the blower 55 occurs again in the first suction pipeline 51 and the second suction pipeline 52, the yarn ends are recovered by the collection box 58 via the first suction pipeline 51 and the second suction pipeline 52, and the yarn ends do not block the first suction pipeline 51 and the second suction pipeline 52. Therefore, in the spinning machine 1, even when the yarn splicing operation is performed in the state where the suction air flow is not generated in the first suction pipeline 51 and the second suction pipeline 52, the occurrence of adverse conditions related to the yarn splicing operation can be avoided.

[0094] In the spinning machine 1 of the present embodiment, the ends of the yarns Y1 and Y2 cut by the cutter 26A of the yarn splicing device 26 stay in the first suction pipeline 51 and the second suction pipeline 52 at the recovery position relative to the spinning unit 2 where the ends are generated, in a state where the suction air flow based on the blower 55 no longer occurs in the first suction pipeline 51 and the second suction pipeline 52. In the spinning machine 1, when the suction air flow based on the blower 55 is generated again in the first suction pipeline 51 and the second suction pipeline 52, the staying ends are recovered by the recovery box 58. In this structure, when the suction air flow based on the blower 55 is generated again in the first suction pipeline 51 and the second suction pipeline 52, the ends generated by the cutting of the yarns Y1 and Y2 by the cutter 26A are automatically recovered by the recovery box 58. Therefore, it is possible to avoid the occurrence of problems such as the clogging of the first suction pipeline 51 and the second suction pipeline 52 by the ends.

[0095] In the spinning machine 1 of the present embodiment, the plurality of spinning units 2 each include a suction device 13. In the spinning machine 1, in a state where the suction air flow does not occur in the first suction pipeline 51 and the second suction pipeline 52, when the yarn splicing operation is performed in one spinning unit 2, the yarn Y2 is captured by the suction device 13 in the other spinning units 2 that require the yarn splicing operation. In this structure, when the yarn splicing cart 3 is located at the other spinning units 2 that require the yarn splicing operation, the yarn Y2 has already been captured by the suction device 13. Therefore, the yarn splicing operation can be efficiently performed.

[0096] In the spinning machine 1 of the present embodiment, when the suction air flow based on the blower 55 is generated again in the first suction pipeline 51 and the second suction pipeline 52, a sending operation for sending the ends to the first suction pipeline 51 and the second suction pipeline 52 is performed in the yarn suction nozzle 27, the yarn suction port 28, and the suction device 13. In this structure, it is possible to avoid the ends remaining in the yarn suction nozzle 27, the yarn suction port 28, and the suction device 13.

[0097] In the spinning machine 1 of the present embodiment, when the suction air flow based on the blower 55 no longer occurs in the first suction pipeline 51 and the second suction pipeline 52, and when the length of the defect of the yarn Y detected by the yarn monitoring device 8 is longer than the specified length, the reversing device 29 rotates the package P by a rotation amount smaller than the rotation amount of the package P in the reverse direction required to remove the defect and then stops the rotation of the package P. When the suction air flow based on the blower 55 no longer occurs in the first suction pipeline 51 and the second suction pipeline 52, if the package P is rotated in the reverse direction to remove all the so-called long defects, there is a risk that the yarn ends will be entangled in the first suction pipeline 51 and the second suction pipeline 52. Therefore, in the spinning machine 1, the rotation of the package P is stopped after rotating the package P by a rotation amount smaller than the rotation amount of the package P in the reverse direction required to remove the defect. Thereby, in the spinning machine 1, when the suction air flow based on the blower 55 no longer occurs in the first suction pipeline 51 and the second suction pipeline 52, not all of the long defects enter the first suction pipeline 51 and the second suction pipeline 52. Therefore, it is possible to avoid the occurrence of problems such as the entanglement of the yarn ends in the first suction pipeline 51 and the second suction pipeline 52.

[0098] In the spinning machine 1 of the present embodiment, a rod 57 is provided, and the rod 57 switches between a flow mode in which the suction air flow based on the blower 55 is generated in the first suction pipeline 51 and the second suction pipeline 52, and a stop mode in which the suction air flow based on the blower 55 is not generated in the first suction pipeline 51 and the second suction pipeline 52. If an operation to switch to the stop mode is performed on the rod 57, the suction air flow immediately stops occurring in the first suction pipeline 51 and the second suction pipeline 52. In this structure, since the flow mode and the stop mode can be immediately switched, no time is required for the transition between the flow mode and the stop mode. Therefore, it is possible to shorten the standby time of the operator for the state change.

[0099] 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 the gist thereof.

[0100] In the above embodiment, an example has been described in which each of the plurality of spinning units 2 includes a suction device 13 and the yarn suction port 28 includes a second catching portion 40. However, the spinning machine 1 may include only either the suction device 13 or the yarn suction port 28.

[0101] In the above-described embodiments and modified examples, the following was described as an example: When a state is reached in which an air suction flow based on the blower 55 is again generated in the first suction pipe 51 and the second suction pipe 52, the first catching portion 33 of the yarn suction nozzle 27 is operated to perform the operation of sending out the yarn end in the yarn suction nozzle 27. However, the operation of sending out the yarn end in the yarn suction nozzle 27 may also be performed by a device other than the first catching portion 33. The same applies to the suction device 13 and the yarn suction port 28, and they may also be implemented by devices other than those in the embodiments.

[0102] In the above-described embodiments and modified examples, the yarn splicing device 26 having the cutter 26A was described as an example. However, the cutting device for cutting the yarn Y guided to the yarn splicing device 26 by the yarn suction nozzle 27 and the suction device 13 (yarn suction port 28) may also be provided outside the yarn splicing device 26.

[0103] In the above-described embodiments and modified examples, the winding bobbins 24 and the traverse guides 25 of the plurality of spinning units 2 were driven together as an example. However, each spinning unit 2 may be configured to include a drive unit for driving the winding bobbin 24 and a drive unit for driving the traverse guide 25. In this case, the reversing device 29 of the yarn splicing carriage 3 may also be omitted, and the package P may be rotated in the direction opposite to the winding direction by the winding bobbin 24 (reversing device).

[0104] In the above-described embodiments and modified examples, the case where a plurality of yarn splicing carriages 3 are provided was described as an example. However, it may also be configured to have only one yarn splicing carriage 3.

[0105] In the above-described embodiments and modified examples, the first suction pipe 51 and the second suction pipe 52 sucking the yarn end were described as an example. However, the "yarn end" may also be a concept including flyings.

[0106] In the above-described embodiments and modified examples, as an example of the yarn winding machine, the spinning machine 1 equipped with the air spinning device 7 was described as an example. The yarn winding machine according to one aspect of the present invention is not limited to the above-described spinning machine 1, and may be, for example, an open-end spinning machine or an automatic winding machine.

Claims

1. A yarn winding machine, characterized in that, Comprising: A plurality of winding units, each of the plurality of winding units having a yarn feeding device for feeding yarn and a winding device for winding the yarn fed from the yarn feeding device to form a package; A yarn splicing device that splices a first yarn from the yarn feeding device and a second yarn of the package from the winding device; A first capturing device that guides the first yarn to the yarn splicing device, the first capturing device having a first capturing portion that attracts and captures the yarn end of the first yarn by jetting compressed air; A second capturing device that guides the second yarn to the yarn splicing device, the second capturing device having a second capturing portion that attracts and captures the yarn end of the second yarn by jetting compressed air, or having a function of blowing compressed air onto the second yarn to capture the second yarn; An attracting pipeline that is connected to the first capturing device and the second capturing device; A blower that generates an attracting air flow in the attracting pipeline; A recovery portion that recovers the yarn ends generated due to the yarn splicing operation via the attracting pipeline; A carriage that has the first capturing device and is configured to be movable along the arrangement direction of the plurality of winding units; and A control portion that controls the operation of the carriage, [[ID=!0]]if the yarn splicing operation is performed a specified number of times in a state where the attracting air flow based on the blower no longer occurs in the attracting pipeline, the control portion causes the carriage to standby at the working position relative to the winding unit, if it becomes a state where the attracting air flow based on the blower is generated again in the attracting pipeline, the yarn ends are recovered by the recovery portion via the attracting pipeline.

2. The yarn winding machine according to claim 1, characterized in that it comprises a cutting device that cuts the yarn guided to the yarn splicing device by the first capturing device and the second capturing device, the yarn ends of the yarn cut by the cutting device in a state where the attracting air flow based on the blower no longer occurs in the attracting pipeline remain in the attracting pipeline at the recovery position relative to the winding unit where the yarn ends are generated, if it becomes a state where the attracting air flow based on the blower is generated again in the attracting pipeline, the remaining yarn ends are recovered by the recovery portion.

3. The yarn winding machine according to claim 1 or 2, characterized in that if the yarn splicing operation is performed the specified number of times in the same winding unit in a state where the attracting air flow based on the blower no longer occurs in the attracting pipeline, the control portion causes the carriage to standby at the working position relative to the winding unit.

4. The yarn winding machine according to any one of claims 1 to 3, characterized in that the specified number of times is one time.

5. The yarn winding machine according to any one of claims 1 to 4, characterized in that the second capturing device is provided in each of the plurality of winding units and has a function of blowing compressed air onto the second yarn to capture the second yarn. In a state where the suction air flow is no longer generated in the suction pipeline, when the yarn splicing operation is performed in one of the winding units, the second yarn is captured by the second capturing device in the other winding units where the yarn splicing operation is required.

6. The yarn winding machine according to any one of claims 1 to 5, characterized in that If it becomes a state where the suction air flow based on the blower is generated again in the suction pipeline, a sending operation for sending the yarn end to the suction pipeline is performed in the first capturing device and the second capturing device.

7. The yarn winding machine according to any one of claims 1 to 6, characterized in that It includes: a detection device that detects defects in the yarn; and a reverse device that rotates the package in the direction opposite to the winding direction, In a state where the suction air flow based on the blower is no longer generated in the suction pipeline, when the length of the defect in the yarn detected by the detection device is longer than a specified length, the reverse device rotates the package by a rotation amount smaller than the rotation amount of the package in the reverse direction required to remove the defect and then stops the rotation of the package.

8. The yarn winding machine according to any one of claims 1 to 7, characterized in that It includes an operation unit that switches to a first state in which the suction air flow based on the blower is generated in the suction pipeline and a second state in which the suction air flow based on the blower is not generated in the suction pipeline, If an operation to switch to the second state is performed in the operation unit, the suction air flow is immediately no longer generated in the suction pipeline.

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