Spinning machine and spinning method

Abstract

In the case where the yarn is broken on the upstream side of the yarn storage device in the yarn travel direction, the yarn remaining on the yarn storage roller can be properly handled by a simple structure. The yarn storage device (17) is provided with a suction device (49). In the case where the yarn (7) is broken on the upstream side of the yarn storage device in the yarn travel direction, the suction device restrains the yarn end (7t) of the yarn on the package side with respect to the upstream end region of the yarn storage roller (41) by causing air to act on the yarn end of the yarn on the package (9) side. After the yarn is broken, the suction device causes the action of the air on the yarn, rotates the package in the direction of winding the yarn, that is, the forward direction, by the winding device (21), and causes the yarn remaining on the yarn storage roller to be unwound from the yarn storage roller. The rotation of the package in the forward direction is stopped at a point in time before the yarn end of the yarn on the package side departs from the yarn storage roller and is wound on the package.

Description

Technical Field

[0001] This invention relates to spinning machines and spinning methods. Background Technology

[0002] Previously, spinning machines equipped with a yarn feeding device, a winding device, and a yarn storage device were known. Patent Document 1 discloses a spinning frame as such a spinning machine.

[0003] In the spinning frame of Patent Document 1, a yarn storage roller is provided in the yarn storage device. By winding yarn around the outer peripheral surface of the yarn storage roller, the yarn can be temporarily stored. A suction device is provided downstream of the yarn storage roller. When a yarn breakage occurs downstream of the yarn storage device, the yarn remaining in the yarn storage roller is attracted and removed by the suction device.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2014-125349

[0005] However, the structure disclosed in Patent Document 1 is merely as follows: when a yarn breakage occurs on the downstream side of the yarn storage device, the yarn remaining in the yarn storage roller is removed. Summary of the Invention

[0006] The purpose of this invention is to enable the proper handling of yarn remaining on the yarn storage rollers through a simple structure after the yarn breaks on the upstream side of the yarn storage device in the yarn direction.

[0007] According to a first aspect of the present invention, a spinning machine with the following structure is provided. That is, the spinning machine includes a yarn feeding device, a winding device, and a yarn storage device. The yarn feeding device is capable of supplying yarn. The winding device winds the yarn supplied from the yarn feeding device to form a package. The yarn storage device is disposed midway along the yarn path formed between the yarn feeding device and the winding device. The yarn storage device has a yarn storage roller and a yarn actuating portion. The yarn storage roller winds and stores the yarn supplied from the yarn feeding device. When the yarn on the upstream side of the yarn in the yarn path is broken, the yarn actuating portion constrains the yarn end on the package side relative to the upstream end region of the yarn storage roller by applying air to the yarn end of the package side. After the yarn breaks, the yarn action section acts on the yarn through air, and the winding device rotates the package in the direction of winding the yarn, i.e., the forward rotation direction, causing the yarn remaining on the yarn accumulation roller to unwind from the yarn accumulation roller. The forward rotation of the package stops at the point before the yarn end on the package side leaves the yarn accumulation roller and begins to wind into the package.

[0008] In this specification, the case where the yarn working part constrains the yarn end of the yarn on the package side includes the case where the device completely constrains the end of the yarn and the case where the device constrains the vicinity of the end of the yarn.

[0009] Therefore, after the yarn on the upstream side of the yarn storage device in the yarn feeding direction is broken, the yarn on the package side can be properly handled with a simple structure. Air can be used to reliably restrain the yarn ends on the package side.

[0010] In the aforementioned spinning machine, the following structure is preferred: The spinning machine includes a reversing valve and a control device. The reversing valve switches between generating and stopping the airflow passing through the yarn action section. The control device controls the reversing valve.

[0011] Therefore, since airflow can be generated in the yarn working part only when needed, energy saving can be achieved.

[0012] In the aforementioned spinning machine, the following structure is preferred: The yarn working part is a suction device. This suction device has a suction port opposite to the yarn accumulation roller, and uses the suction port to attract the yarn end remaining on the yarn accumulation roller.

[0013] Therefore, by attracting the yarn ends remaining on the yarn accumulation rollers, the behavior of the yarn can be stabilized. As a result, the yarn ends will not tangle with the yarn, thus facilitating the unwinding of the yarn remaining on the yarn accumulation rollers.

[0014] In the aforementioned spinning machine, the following structure is preferred: the yarn storage device includes a yarn guiding portion, which is positioned upstream of the uppermost portion of the outer periphery of the yarn wound around the yarn storage roller. Yarn supplied from the yarn feeding device is guided via the yarn guiding portion to the uppermost portion of the yarn storage roller. The suction port is positioned facing the yarn guiding portion.

[0015] Therefore, the yarn end remaining on the yarn accumulation roller can be reliably attracted through the suction port of the suction device.

[0016] In the aforementioned spinning machine, the following structure is preferred: The yarn accumulating roller accumulates yarn by rotating in the direction of winding the yarn from upstream, i.e., the forward rotation direction. When the yarn breaks off on the upstream side in the yarn feeding direction relative to the yarn accumulating device, the forward rotation of both the package and the yarn accumulating roller stops. After both the package and the yarn accumulating roller stop rotating in the forward direction, the yarn accumulating roller rotates in the reverse direction.

[0017] Therefore, by rotating the yarn accumulation roller in the reverse direction, the yarn end remaining on the yarn accumulation roller is unwound upstream. As a result, the yarn end can be more effectively attracted through the suction port of the suction device.

[0018] In the aforementioned spinning machine, it is preferable that the yarn accumulation roller rotates in the forward direction after the yarn accumulation roller has rotated in the reverse direction.

[0019] Therefore, by rotating the yarn accumulation roller in the forward direction while the yarn is being drawn in by the suction port, a tightening effect is generated on the yarn accumulation roller caused by the continuous yarn between the package and the yarn accumulation roller, allowing the remaining yarn on the yarn accumulation roller to be neatly arranged. Thus, the remaining yarn on the yarn accumulation roller can be smoothly unwound from the yarn accumulation roller.

[0020] In the aforementioned spinning machine, it is preferable that the amount of rotation of the yarn accumulation roller when it rotates in the reverse direction is less than the amount of rotation when it rotates in the reverse direction.

[0021] Therefore, it is possible to prevent the yarn end attracted by the suction port of the suction device from disengaging from the suction port when the yarn accumulation roller rotates in the reverse direction and when the yarn accumulation roller rotates in the forward direction. Thus, the restraining effect formed by the suction device can continue.

[0022] In the aforementioned spinning machine, the yarn action section can also be a jetting device that sprays air around the yarn accumulation roller.

[0023] Therefore, the behavior of this part of the yarn can be substantially stabilized by the jetting of air forming the jetting device.

[0024] In the aforementioned spinning machine, the following structure is preferred: The yarn storage device includes a yarn-holding member and a yarn-removing member. The yarn-holding member rotates relative to the yarn storage roller. The yarn-holding member hooks the yarn pulled from the yarn storage roller. The yarn-removing member performs a yarn-removing action at a first time point, after the yarn end on the package side leaves the yarn storage roller, thus removing the yarn path from the yarn-holding member.

[0025] Therefore, even if the yarn end on the package side becomes entangled in the yarn hanging member when it leaves the yarn storage roller, the yarn removal member can remove the yarn end from the yarn hanging member.

[0026] In the aforementioned spinning machine, the following structure is preferred: The yarn removal member is configured to perform the yarn removal operation at a second time point different from the first time point. The first amount of movement of the yarn removal member related to the yarn removal operation performed at the first time point is different from the second amount of movement of the yarn removal member related to the yarn removal operation performed at the second time point.

[0027] Therefore, even if the yarn end on the package side becomes entangled in the yarn hanging member when it leaves the yarn storage roller, the yarn end can be reliably removed from the yarn hanging member by a different yarn removal action.

[0028] In the above-described spinning machine, it is preferable that the above-described yarn feeding device, the above-described winding device, and the above-described yarn storage device are each provided in a plurality of spinning units.

[0029] Therefore, the above-mentioned yarn feeding device, winding device and yarn storage device can be easily utilized.

[0030] In the aforementioned spinning machine, it is preferable that each of the plurality of spinning units has a drive unit for the aforementioned winding device.

[0031] Therefore, it is possible to control the winding device to be driven and stopped independently for each spinning unit.

[0032] In the aforementioned spinning machine, the following structure is preferred: In each of the plurality of spinning units, the yarn storage device includes a yarn holding member and a yarn removal member. The yarn holding member rotates relative to the yarn storage roller and hooks the yarn pulled out from the yarn storage roller. The yarn removal member removes the yarn by removing the yarn path from the yarn holding member after the yarn end on the package side leaves the yarn storage roller. Each of the plurality of spinning units includes a drive unit for the yarn removal member.

[0033] Therefore, unlike in the past, it is possible to control the yarn removal lever to operate independently for each spinning unit.

[0034] According to a second aspect of the present invention, a spinning method is provided. This spinning method is performed by a spinning machine equipped with a yarn feeding device, a winding device, and a yarn storage device. The yarn feeding device is capable of supplying yarn. The winding device winds the yarn supplied from the yarn feeding device to form a package. The yarn storage device is disposed midway along the yarn path formed between the yarn feeding device and the winding device. The yarn storage device has a yarn storage roller and a yarn actuating section. The yarn storage roller winds and stores the yarn supplied from the yarn feeding device. When the yarn on the upstream side of the yarn path relative to the yarn storage device breaks, the yarn actuating section constrains the yarn end on the package side relative to the upstream end region of the yarn storage roller by applying air to the yarn end of the package side. After the yarn breaks, the yarn action section applies air to the yarn, and the winding device rotates the package in the direction of winding the yarn, i.e., the forward rotation direction, causing the yarn remaining on the yarn accumulation roller to unwind from the yarn accumulation roller. The forward rotation of the package stops at the point before the yarn end on the package side leaves the yarn accumulation roller and begins to wind into the package.

[0035] Therefore, after the yarn on the upstream side of the yarn storage device in the yarn direction is broken, the yarn on the package side can be properly processed. Attached Figure Description

[0036] Figure 1 This is a side view showing the structure of the spinning unit of a spinning machine according to an embodiment of the present invention.

[0037] Figure 2 This is the control block diagram of the spinning unit.

[0038] Figure 3 This is a diagram showing the positional relationship between the yarn storage roller and the suction device of the yarn storage device.

[0039] Figure 4 It is a diagram showing the rotational state of the roll and yarn storage rollers.

[0040] Figure 5 This is a perspective view illustrating the detection and capture devices.

[0041] Explanation of reference numerals in the attached figures

[0042] 7...spinning (yarn); 9...carrying; 17...yarn storage device; 21...winding device; 23...yarn feeding device; 41...yarn storage roller; 45...spindle wing (yarn hanging component); 49...suction device (yarn action part); 51...yarn removal rod (yarn removal component); 71...suction port; 79...yarn inlet part. Detailed Implementation

[0043] Reference Figure 1 and Figure 2 A spinning machine according to one embodiment of the present invention will be described. In the following description, "upstream" and "downstream" refer to the upstream and downstream directions of the yarn (specifically, yarn sliver 3, fiber bundle 5, spinning 7) in the direction of travel (yarn direction), respectively.

[0044] The spinning machine has at least one spinning unit 1 and a machine control device (illustrated). The machine control device manages one or more spinning units 1. The spinning unit 1 conveys the fiber bundle 5 downstream in the yarn feeding direction through the drafting device 11, and spins the fiber bundle 5 from the drafting device 11 to generate yarn 7 through the spinning device 13, and winds the yarn 7 through the winding device 21 to form a package 9. Figure 5 The diagram shows a cylindrical roll 9, but the spinning machine can also be configured such that the spinning yarn 7 is wound into a conical roll 9.

[0045] like Figure 1 As shown, a spinning unit 1 includes a drafting device 11, a spinning device 13, a yarn monitoring device 15, a yarn storage device 17, a yarn splicing device 19, and a winding device 21. The drafting device 11, the spinning device 13, the yarn monitoring device 15, the yarn storage device 17, the yarn splicing device 19, and the winding device 21 are arranged sequentially from the upstream side to the downstream side in the yarn feeding direction.

[0046] like Figure 2 As shown, the aforementioned devices included in the spinning unit 1 are controlled by a unit controller (control device) 25 installed in the spinning unit 1. Alternatively, at least one of the multiple devices included in the spinning unit 1 may be controlled by a machine control device. Furthermore, one unit controller may be provided for each specified number of spinning units 1.

[0047] The drafting device 11 generates fiber bundles 5 by stretching (drafting) the yarn 3 supplied by a sliver can (not shown). The drafting device 11 holds the yarn 3 between a plurality of drafting rollers and a plurality of opposing rollers, and rotates the drafting rollers in the drafting direction to transport the yarn 3 downstream and stretch it to a predetermined amount (or thickness) of fiber to generate fiber bundles 5.

[0048] The drafting device 11 includes a rear roller 31, a third roller 33, an intermediate roller 35, and a front roller 37 as multiple drafting rollers. These rollers 31, 33, 35, and 37 are arranged sequentially from the upstream side to the downstream side. A rubber belt 39 is wound around the intermediate roller 35. Each drafting roller is driven to rotate at a predetermined rotational speed.

[0049] A spinning device 13 is provided downstream of the front roller 37 of the drafting device 11. The spinning device 13 twists the fiber bundle 5 supplied by the drafting device 11 to generate yarn 7. In this embodiment, the spinning device 13 is an air-type spinning device that uses a swirling airflow to twist the fiber bundle 5.

[0050] In spinning unit 1 (spinning machine), drafting device 11 and spinning device 13 constitute a yarn feeding device 23 capable of supplying yarn 7. The yarn 7 generated in the yarn feeding device 23 travels from the yarn feeding device 23 toward the winding device 21. A yarn path (yarn travel path) is formed between the yarn feeding device 23 and the winding device 21 for the yarn 7 to travel.

[0051] A yarn monitoring device 15 is provided downstream of the spinning unit 13. The yarn monitoring device 15 monitors the presence and quality of the spun yarn 7 (such as the presence or absence of fineness and / or foreign matter). The yarn monitoring device 15 uses a transmissive light sensor for non-contact monitoring. When the yarn monitoring device 15 detects a yarn defect in the spun yarn 7 (e.g., an abnormal area in the fineness of the spun yarn 7), it sends a yarn defect detection signal to the unit controller 25.

[0052] Upon receiving a yarn defect detection signal, the unit controller 25 stops spinning in the spinning device 13, thereby cutting off the yarn 7. That is, the yarn 7 is disconnected. When stopping spinning in the spinning device 13, the unit controller 25 also stops the drafting action performed by the drafting device 11. Furthermore, simultaneously with the cutting of the yarn 7, or at a predetermined time point after the cutting of the yarn 7, the unit controller 25 stops the winding action performed by the winding device 21 and the pulling action performed by the yarn storage device 17.

[0053] The yarn monitoring device 15 is not limited to a transmissive optical sensor; for example, an electrostatic capacitive sensor can also be used to monitor the presence and quality of the spinning yarn 7. Alternatively, instead of stopping spinning and cutting the spinning yarn 7, a structure can be adopted in which the spinning yarn 7 is cut using a cutting device located near the yarn monitoring device 15.

[0054] A yarn storage device 17 is provided downstream of the yarn monitoring device 15 (i.e., downstream of the spinning device 13). The yarn storage device 17 is positioned midway along the yarn path (yarn feeding path) formed between the yarn feeding device 23 and the winding device 21. The yarn storage device 17 includes a yarn storage roller 41, a yarn storage motor 43, a spindle (yarn hanging member) 45, a yarn detection sensor 47, a suction device (yarn action part) 49, and a yarn removal bar (yarn removal member) 51.

[0055] The yarn storage roller 41 is capable of winding and storing the yarn 7 supplied by the yarn feeding device 23. The yarn 7 is stored in a state of being wound around the outer peripheral surface of the yarn storage roller 41. The yarn storage roller 41 is rotated in either the forward or reverse direction by the yarn storage motor 43. In this embodiment, since a known output roller pair is not provided between the spinning device 13 and the yarn storage device 17, the yarn storage device 17 performs the pulling action of pulling the yarn 7 out of the spinning device 13. However, an output roller pair may be provided between the spinning device 13 and the yarn storage device 17.

[0056] The yarn storage motor 43 can also be configured as an electric motor capable of both forward and reverse rotation. The yarn storage motor 43 rotates in the forward direction, causing the yarn storage roller 41 to rotate in the forward direction. The yarn storage motor 43 also rotates in the reverse direction, causing the yarn storage roller 41 to rotate in the reverse direction. The yarn storage motor 43 rotates the yarn storage roller 41 in the forward direction to perform a pull-out action during normal spinning operation of the spinning unit 1.

[0057] A spindle 45 is mounted on the downstream end (front end) of the yarn storage roller 41. The spindle 45 is configured to contact the yarn 7 drawn from the yarn storage roller 41. The spindle 45 is supported so as to be able to rotate relative to the yarn storage roller 41. A permanent magnet is mounted on either the spindle 45 or the yarn storage roller 41, and a hysteresis material is mounted on the other. Through these magnetic units, a torque is generated that resists the relative rotation of the spindle 45 relative to the yarn storage roller 41. Therefore, when the spindle 45 is hooked with the yarn 7, only when a force such as the aforementioned torque is applied to the spindle 45 (i.e., when the yarn 7 is subjected to a predetermined tension or more), the spindle 45 rotates relative to the yarn storage roller 41, and the yarn 7 wound on the yarn storage roller 41 can be unwound. On the other hand, when no force to overcome the torque is applied to the spindle 45, the yarn accumulation roller 41 and the spindle 45 rotate together, and the yarn 7 is accumulated in the yarn accumulation roller 41.

[0058] Thus, the yarn storage device 17 operates such that if the tension of the downstream spinning yarn 7 increases, it unwinds the yarn 7; if the tension of the downstream spinning yarn 7 decreases (the yarn 7 wants to slack off), it stops unwinding the yarn 7. Therefore, the yarn storage device 17 can eliminate slack in the yarn 7 and apply appropriate tension to it. Furthermore, the spindle wing 45 operates as described above to absorb tension fluctuations in the yarn 7 applied between the yarn storage device 17 and the winding device 21, thereby preventing these tension fluctuations from affecting the yarn 7 between the spinning device 13 and the yarn storage device 17.

[0059] Alternatively, the yarn storage device 17 may not have such a magnetic unit, but instead has an electromagnet instead of a permanent magnet. Or, the yarn storage device 17 may not have a magnetic unit, but instead has a motor that drives the spindle 45 to rotate.

[0060] The yarn detection sensor 47 is a sensor that detects the amount of yarn stored on the yarn storage roller 41. The yarn detection sensor 47 is configured to detect the spinning 7 at a predetermined position on the yarn storage roller 41. By detecting whether there is yarn 7 at that predetermined position, the yarn detection sensor 47 can detect whether the amount of yarn stored is above a predetermined amount. When the spinning 7 is wound onto the package 9, the unit controller 25 controls the rotation speed of the winding drum 63 of the winding device 21 based on the detection result of the yarn detection sensor 47, adjusting the amount of yarn stored on the yarn storage roller 41 to a predetermined range.

[0061] The suction device 49 is arranged laterally to the yarn storage roller 41 in a direction intersecting the axial direction of the yarn storage roller 41. The suction device 49 has a hollow tube 73. The suction device 49 is connected to the suction source 75, which serves as a negative pressure source, and can generate a suction airflow within the tube 73. When the spinning 7 is disconnected on the upstream side of the yarn storage device 17 in the yarn feeding direction (between the yarn feeding device 23 and the yarn storage device 17), the suction device 49 generates a suction airflow around the yarn storage roller 41. Thus, the suction device 49 can attract and capture the portion of the spinning 7 on the package 9 side that is upstream of the yarn storage roller 41.

[0062] The yarn removal lever 51 is positioned near the yarn storage roller 41. The yarn removal lever 51 is capable of removing yarn from the spinning 7 (yarn path) from the spindle 45. The yarn removal lever 51 is movably positioned so as to be able to move between a standby position and a yarn removal position. Figure 1 The diagram shows the yarn removal lever 51 in the standby position, and the arrows indicate the direction of movement of the yarn removal lever 51 from the standby position to the yarn removal position. During its movement from the standby position to the yarn removal position, the yarn removal lever 51 passes through a space downstream of the yarn storage roller 41. If there is yarn 7 hooked onto the spindle 45 at this time, the yarn removal lever 51 is activated to remove the yarn 7 from the spindle 45.

[0063] In this embodiment, the yarn removal lever 51 is configured as a single spindle driven type. That is, the yarn removal lever 51 is provided in each spinning unit 1, and each yarn removal lever 51 has a separate drive unit (motor or cylinder, etc.). Therefore, the yarn removal lever 51 can operate independently relative to the yarn removal levers 51 of other spinning units 1.

[0064] A guide member (guide component) 55 is provided downstream of the yarn accumulation roller 41 to guide the yarn 7 wound on the package 9. The guide member 55 can restrict the path of the yarn 7 at a position downstream of the yarn accumulation roller 41. The guide member 55 is, for example, a U-shaped portion formed as a plate-like member fixed relative to the spinning unit 1 or a circular portion with a partial notch.

[0065] A yarn splicing device 19 is provided downstream of the guide member 55 (i.e., downstream of the yarn storage device 17). When the yarn 7 is disconnected between the yarn feeding device 23 and the winding device 21 in the yarn feeding direction, the yarn splicing device 19 performs a splicing process to connect the yarn 7 from the yarn feeding device 23 with the yarn 7 from the package 9. In this embodiment, the yarn splicing device 19 is a connecting device that twists the yarn ends together by a swirling airflow generated by air. Furthermore, instead of a connecting device, a mechanical yarn break connector, for example, can be used as the yarn splicing device 19.

[0066] A guiding device 57 is provided in the spinning unit 1. When the spinning 7 is disconnected upstream of the yarn storage device 17, the guiding device 57 guides the yarn 7 from the yarn feeding device 23 to the yarn receiving device 19. The guiding device 57 is supported at one end along its long side and is rotatable, capable of rotating vertically. The guiding device 57 has a hollow member and is connected to a suction source 75. The guiding device 57 can generate a suction airflow at the suction port 59 located at its other end along its long side. By rotating downwards, the guiding device 57 can capture the yarn end of the spinning 7 from the yarn feeding device 23 using the suction port 59. After capturing the yarn end of the spinning 7 from the yarn feeding device 23, the guiding device 57 rotates upwards to guide the yarn end towards the yarn receiving device 19.

[0067] The yarn end of the spun yarn 7 from the yarn feeding device 23 is guided towards the yarn splicing device 19 via the guiding device 57. As described later, the spun yarn 7 from the package 9 is guided to the yarn splicing device 19 after being captured by the capturing device 83. In this state, the yarn splicing device 19 is driven to perform a splicing process, connecting the spun yarn 7 from the yarn feeding device 23 with the spun yarn 7 from the package 9. Thus, even if the spun yarn 7 breaks off upstream of the yarn storage device 17, the spinning unit 1 can restart the stopped spinning process and perform a splicing process, rewinding the spun yarn 7 from the yarn feeding device 23 onto the package 9.

[0068] A winding device 21 is provided downstream of the yarn storage device 17 (downstream of the yarn receiving device 19 in this embodiment). The winding device 21 winds the yarn 7 supplied from the yarn feeding device 23 to form a package 9. In this embodiment, the winding device 21 is positioned higher than the upstream end of the drafting device 11 in the height direction of the spinning unit 1. Thus, the spinning unit 1 has a layout in which the yarn path extends from bottom to top. The winding device 21 includes a rocker arm 61 and a winding drum 63.

[0069] The cradle arm 61 supports the winding tube 67 used for winding the yarn 7 so that it can rotate. The cradle arm 61 can rotate with its root as the center of rotation. Thus, in the winding device 21, even if the diameter of the package 9 increases due to the yarn 7 being wound on the winding tube 67, the winding of the yarn 7 can continue appropriately.

[0070] For the winding drum 63, the winding drum drive motor (not shown) is controlled by the unit controller 25 and rotates when it is in contact with the outer peripheral surface of the winding tube 67 or the package 9. A (not shown) transverse groove is formed on the outer peripheral surface of the winding drum 63, through which the yarn 7 can be transversely moved at a predetermined width. Thus, the winding device 21 causes the yarn 7 to be wound onto the winding tube 67 while transversely moving, thereby forming the package 9.

[0071] In this embodiment, the winding device 21 is configured as a single spindle driven type. That is, each winding device 21 provided in each spinning unit 1 has a separate drive unit (winding drum drive motor), thereby configuring it to rotate the winding drum 63, and in turn, rotate the package 9. The winding device 21 can independently change the rotation operation of the package 9 relative to the winding devices 21 of other spinning units 1.

[0072] In the winding device 21, it is also possible to replace the structure of the winding drum 63 with the lateral groove with a known structure that has a winding drum without the lateral groove and a lateral guide that is set independently of the winding drum and moves back and forth.

[0073] Next, refer to Figure 3 and Figure 4 The processing of the spinning 7 on the package 9 side after the spinning 7 is disconnected between the yarn feeding device 23 and the yarn storage device 17 will be explained.

[0074] During normal spinning by the spinning unit 1, the package 9 of the winding device 21 and the yarn accumulation roller 41 of the yarn accumulation device 17 rotate in predetermined directions. In the following description, the predetermined direction in which the package 9 rotates is referred to as the forward rotation direction, and the predetermined direction in which the yarn accumulation roller 41 rotates is referred to as the forward rotation direction.

[0075] In spinning unit 1, there is a situation where, while the yarn 7 is supplied from the yarn feeding device 23 and the package 9 rotates in the forward direction, the yarn 7 is cut off based on the monitoring results of the yarn monitoring device 15, as described above. In this case, the yarn 7 is disconnected between the yarn feeding device 23 and the yarn storage device 17 in the yarn feeding direction. In this embodiment, the yarn 7 is cut off by stopping the supply operation of the yarn feeding device 23. Furthermore, the pull-out operation of the yarn storage device 17 and the winding operation of the winding device 21 stop immediately or stop after a predetermined time.

[0076] At the moment when spinning 7 breaks, such as Figure 1 As shown by the double-dotted line, the yarn end 7t of the spinning 7 on the package 9 side is located between the yarn feeding device 23 and the yarn storage device 17. In this embodiment, the yarn end 7t is pre-captured by the suction device 49 of the yarn storage device 17 (see reference). Figure 3 (Ref. 7c) In this state, by performing the winding action formed by the winding device 21 at a slower speed than before the spinning 7 is disconnected, the remaining spinning 7 on the yarn accumulation roller 41 is unwound from the yarn accumulation roller 41 toward the winding device 21. The operation of the suction device 49 at this time will be described later.

[0077] The spinning process 7 involves unwinding from the yarn storage roller 41, and the unwinding of the spinning yarn 7 from the yarn storage roller 41 is finally completed. If the spinning yarn 7 is completely unwound from the yarn storage roller 41, its end leaves the yarn storage roller 41 and is immediately captured by the capturing device 83. The change in the yarn path accompanying the capture of the spinning yarn 7 by the capturing device 83 is detected by the detection device 81. Furthermore, details of the capturing device 83 and the detection device 81 will be described later.

[0078] If the detection device 81 does not detect the detected yarn 7, the unit controller 25 stops the rotation of the package 9 formed by the winding device 21 in the forward direction. As a result, the yarn end 7t of the yarn 7 on the package 9 side can be positioned downstream of the yarn storage device 17 and upstream of the winding device 21.

[0079] Therefore, after the spinning 7 is disconnected between the yarn feeding device 23 and the yarn storage device 17 in the yarn feeding direction, the spinning 7 on the package 9 side can be properly processed with a simple structure. In this embodiment, yarn defects contained in the spinning 7 on the package 9 side can be removed from the spinning 7 by the capturing device 83. The position where the yarn end 7t of the spinning 7 on the package 9 side is captured by the capturing device 83 is not particularly limited, and can be any position between the yarn storage device 17 and the winding device 21 in the yarn feeding direction.

[0080] Next, the suction device 49 will be described in detail. When the spinning 7 is disconnected between the yarn storage device 17 and the yarn feeding device 23, the drafting operation of the drafting device 11 is immediately stopped. Linked to the cessation of the drafting operation, the pulling-out operation of the yarn storage device 17 and the winding operation of the winding device 21 are immediately stopped or stop after a predetermined time. Therefore, with the yarn end 7t of the spinning 7 on the package 9 side positioned upstream of the yarn storage roller 41, the spinning 7 on the package 9 side stops while connected to the yarn storage device 17. Then, the package 9 formed by the winding device 21 is rotated in the forward direction at a lower speed than before the disconnection, and the spinning 7 is unwound downstream from the yarn storage roller 41. During this unwinding operation, the yarn end 7t upstream of the yarn storage roller 41 is attracted and captured by the suction device 49.

[0081] Specifically, the unit controller 25 causes the suction device 49 to generate a suction airflow and to draw and capture the yarn end 7t located upstream of the yarn accumulation roller 41 from the suction port 71. Thus, the yarn 7 is constrained relative to the upstream end region of the yarn accumulation roller 41, preventing path changes of the yarn 7 immediately upstream of the yarn accumulation roller 41 while all the yarn 7 remaining on the yarn accumulation roller 41 is unwound to the downstream side. In other words, the suction device 49 restricts the behavior of the yarn end 7t of the yarn 7 to prevent it from becoming free, maintaining the position of the yarn 7.

[0082] like Figure 3 As shown, the suction device 49 includes a tube 73. The tube 73 has a suction port 71 at one end along its long side and is connected to a suction source 75 at the other end along its long side. The suction port 71 faces the yarn storage roller 41. A first valve (reversing valve) 77 is provided midway along the long side of the tube 73. The opening and closing of the first valve 77 is controlled by the unit controller 25. By controlling the opening of the first valve 77, a suction airflow can be generated in the tube 73 of the suction device 49. By controlling the closing of the first valve 77, the suction airflow in the tube 73 can be stopped. When a suction airflow is generated, a suction force acts on the outer peripheral surface of the yarn storage roller 41, drawing the yarn 7 wound around the outer peripheral surface (the yarn 7 remaining on the yarn storage roller 41) from the suction port 71. By drawing the yarn 7 from the suction port 71 into the interior of the tube 73, the yarn 7 can be constrained to a certain position relative to the yarn storage roller 41. The attraction source 75 is provided, for example, at the end of the spinning machine and is shared in multiple spinning units 1.

[0083] The suction port 71 is configured to face the yarn inlet portion 79 of the yarn storage device 17. The yarn inlet portion 79 is the area on the outer peripheral surface of the yarn storage roller 41 located immediately in front of where the spinning 7 substantially begins to wind.

[0084] The yarn inlet section 79 will be described in detail. The yarn storage roller 41 has a cylindrical storage section 41a, and the spun yarn 7 is wound in a spiral shape on the storage section 41a. Figure 3 In the diagram, the storage section 41a is shown as a cylinder with a constant outer diameter, but it can also be configured as a cone shape with an outer diameter that decreases in stages or linearly as it moves downstream. As the package 9 rotates in the forward direction to wind the spinning yarn 7, the spinning yarn 7 travels downstream in a spiral path within the storage section 41a of the yarn storage roller 41. The axis of the yarn storage roller 41 is aligned with the spiral axis on which the spinning yarn 7 is wound. At one end of the axis of the yarn storage roller 41, corresponding to the upstream side of the spiral, a tapered section 41b is formed on the yarn storage roller 41. This tapered section 41b corresponds to the yarn inlet section 79.

[0085] The yarn inlet section 79 is located in the upstream end region of the yarn storage roller 41. Therefore, the yarn 7 captured by the suction port 71 of the suction device 49 is constrained in a state located near the upstream end region of the yarn storage roller 41.

[0086] Hereinafter, the axial upstream side of the yarn storage roller 41 refers to the upstream side of the aforementioned spiral in that axial direction, and the axial downstream side refers to the downstream side of the spiral in that axial direction.

[0087] The tapered portion 41b is formed into a generally conical shape with a diameter larger than that of the storage portion 41a. The diameter of the tapered portion 41b decreases as it approaches the storage portion 41a, and becomes equal to the diameter of the storage portion 41a at the portion where it connects with the storage portion 41a.

[0088] The yarn inlet section 79 is located on the axial upstream side of the yarn storage roller 41, where the yarn inlet section 7 is arranged and wound on the storage section 41a. Figure 3 The yarn 7 from the upstream side of the yarn feeding direction is given tension due to the rotation of the yarn accumulation roller 41, and is guided towards the upstream part 80 while contacting and being guided with the yarn inlet part 79 (conical part 41b) as needed.

[0089] By guiding the spinning yarn 7 to a predetermined position while rotating the yarn accumulation roller 41, the previously wound yarn 7 in the accumulation section 41a is pressed down by the subsequently wound yarn 7 and moved little by little towards the axial downstream side. As a result, the yarn 7 can be accumulated in the accumulation section 41a in a neatly arranged state.

[0090] Reference Figure 4The timing diagram is used to specifically explain the rotation control of the yarn storage roller 41 and the package 9 when the spinning 7 is disconnected at the upstream side of the yarn storage roller 41. Time point t0 is the time point when the spinning 7 is disconnected. When the spinning 7 is disconnected, the unit controller 25 stops the rotation of the package 9 and the yarn storage roller 41 in the forward direction at time point t1, which is a predetermined time elapsed from time point t0. Specifically, the unit controller 25 stops the drive of the winding drum drive motor and the drive of the yarn storage motor 43. The yarn end 7t of the spinning 7 on the package 9 side is wound on the yarn storage roller 41 due to the rotation of the yarn storage roller 41 in the forward direction before stopping at time point t1. At time point t1, the yarn end 7t of the spinning 7 on the package 9 side is located near the upstream portion 80.

[0091] Subsequently, the unit controller 25 maintains the state of stopping the rotation of the package 9 at time t2, and begins the reverse rotation of the yarn accumulation roller 41. The unit controller 25 controls the opening of the first valve 77 at time t2 or slightly earlier. This generates a suction flow in the suction device 49. The reverse rotation of the yarn accumulation roller 41 continues until time t3.

[0092] As the yarn accumulation roller 41 rotates in the reverse direction, the yarn end 7t of the spinning 7 on the package 9 side is attracted by the suction device 49. Simultaneously, the spinning 7 unwinds upstream from the yarn accumulation roller 41. As described above, the suction port 71 of the suction device 49 is configured to face the yarn inlet portion 79. Therefore, during the reverse rotation of the yarn accumulation roller 41, the yarn end 7t located near the upstream portion 80 is easily attracted by the suction port 71. Figure 3 In the figure, reference numeral 7c indicates the yarn end 7t that is being sucked in by the suction device 49.

[0093] At time point t3, when the yarn storage roller 41 has rotated a predetermined amount in the reverse direction, the unit controller 25 stops the rotation in the reverse direction.

[0094] At time t3, the same time as the stop of rotation in the reverse direction, the yarn accumulation roller 41 begins to rotate in the forward direction. The forward rotation of the yarn accumulation roller 41 continues until time t4. Alternatively, the forward rotation may begin after a predetermined time has elapsed after the stop of rotation in the reverse direction.

[0095] As the yarn accumulation roller 41 rotates in the forward direction from time point t3 to time point t4, a portion of the yarn 7 that was once sucked in by the suction device 49 is pulled out and wound around the yarn accumulation roller 41. The suction port 71 of the suction device 49 faces the yarn inlet portion 79; therefore, as the yarn accumulation roller 41 rotates in the forward direction, the yarn 7 pulled out from the suction device 49 is naturally guided from the yarn inlet portion 79 towards the uppermost portion 80. Thus, the yarn 7 can be well arranged in the accumulation section 41a.

[0096] From time point t3 to time point t4, the yarn accumulation roller 41 rotates only slightly in the forward direction. Specifically, the amount of rotation in this forward direction is less than the amount of rotation in the reverse direction of the yarn accumulation roller 41 after the spinning 7 is broken. Therefore, at this moment, the yarn end 7c of the spinning 7 on the package 9 side is not fully pulled out from the suction device 49. In other words, at time point t4, the yarn end 7c remains inside the suction device 49. That is, at this moment, the yarn end 7c does not protrude from the suction port 71.

[0097] The portion of the spinning yarn 7 is pulled out from the suction device 49 as the yarn accumulation roller 41 rotates in the forward direction, but the suction device 49 acts as a suction airflow to counteract this pulling out direction. Therefore, the suction device 49 also functions as a resisting element that provides resistance to the spinning yarn 7 traveling in the direction of winding around the yarn accumulation roller 41.

[0098] After the yarn accumulation roller 41 stops rotating in the forward direction at time t4, the package 9 begins rotating in the forward direction at time t5. As a result, the spinning yarn 7 is pulled towards the package 9 side, and thus, the spinning yarn 7 is unwound from the yarn accumulation roller 41 to the downstream side. At this time, the yarn end 7c on the upstream side is sucked in by the suction device 49, thus preventing the yarn end 7c from tangling with the unwound spinning yarn 7. Therefore, the unwinding of the spinning yarn 7 from the yarn accumulation roller 41 proceeds smoothly.

[0099] As the package 9 rotates in the forward direction, almost simultaneously with the complete unwinding of the spinning yarn 7 from the yarn storage roller 41, the yarn end 7c begins to be pulled out from the suction device 49. Finally, the yarn end 7c of the spinning yarn 7 on the package 9 side detaches from the suction device 49 and moves downstream of the yarn storage device 17. Subsequently, the unit controller 25 controls the closure of the first valve 77. Thus, the suction flow of the suction device 49 stops.

[0100] The significance of controlling the rotation of the yarn storage roller 41 in the reverse and forward directions, as shown from time point t2 to time point t4, will be explained below.

[0101] The yarn 7 is generated by twisting by the spinning device 13. Therefore, when the yarn 7 is broken, the portion near the yarn end 7t tends to deform in a certain direction due to the influence of the twisting torque.

[0102] At time t1, the yarn end 7t is as follows: Figure 3 As shown by reference numeral 7a in the attached drawing, the yarn end 7a becomes free near the upstream portion 80. Due to the aforementioned torque, the free yarn end 7a is highly likely to come into contact with the remaining yarn 7 wound in the storage portion 41a, as shown by reference numeral 7b in the attached drawing.

[0103] If the yarn end 7t, as shown by reference numeral 7b, becomes entangled on the spinning yarn 7 wound on the yarn storage roller 41, it becomes a cause of tension variation and / or yarn breakage. Alternatively, the following situation exists: the yarn 7 on the yarn storage roller 41 becomes entangled and detaches in one go, resulting in an unwinding error where the spinning yarn 7 is unwound from the yarn storage roller 41.

[0104] As a method to prevent the yarn end 7a from tangling with the spinning yarn 7 wound on the yarn storage roller 41, centrifugal force can be used to make the yarn end 7a swing. Therefore, during the unwinding process of pulling the spinning yarn 7 downstream from the yarn storage roller 41, the yarn storage roller 41 can be rotated in the forward direction at a certain speed. However, if the yarn storage roller 41 is rotated when the spinning yarn 7 from the yarn storage roller 41 is unwound downstream, it will cause an unexpected change in the twist strength of the spinning yarn 7 between the yarn storage roller 41 and the winding device 21.

[0105] In this embodiment, firstly, the yarn storage roller 41 is rotated in the reverse direction, causing the suction device 49 to capture the free yarn end 7a. As a result, the yarn end 7a is removed from the yarn storage roller 41, as indicated by reference numeral 7c. Then, while continuing the suction of the spun yarn 7 formed by the suction device 49, the yarn storage roller 41 is rotated slightly in the forward direction. This eliminates any slack in the spun yarn 7 between the suction device 49 and the yarn storage roller 41, resulting in the spun yarn 7 being guided from the suction port 71 through the yarn inlet portion 79 to the upstream portion 80. Furthermore, the forward rotation of the yarn storage roller 41 provides a sealing effect on the outer periphery of the spun yarn 7 relative to the yarn storage roller 41.

[0106] Based on the above, the yarn 7 wound on the yarn storage roller 41 is regularly arranged on the storage section 41a. Therefore, by rotating the package 9 in the forward direction while the rotation of the yarn storage roller 41 is stopped, the yarn 7 can be unwound from the yarn storage roller 41 in a neat spiral and conveyed downstream. After the last turn of the yarn 7 is unwound from the yarn storage roller 41 (or almost simultaneously), the yarn end 7c disengages from the suction port 71 of the suction device 49. Therefore, tangling of the yarn end 7t can be reliably prevented.

[0107] In this embodiment, the yarn tip 7t of the spinning 7 is constrained by causing the suction flow formed by the suction device 49 to act relative to the spinning 7. Since an airflow is used for constraint, the vicinity of the unstable yarn tip 7t can be flexibly constrained. In addition, the yarn tip 7t of the spinning 7 can be easily controlled by the airflow.

[0108] Compared to structures that constrain the yarn 7 by contacting one or more components (e.g., the plate-shaped guide described later) with the yarn 7, structures that use airflow to constrain the yarn end 7t of the yarn 7, as in this embodiment, have the advantage that dirt such as fiber debris is less likely to adhere.

[0109] In this embodiment, the first valve 77 is controlled by the unit controller 25 to open only when the spinning 7 is disconnected upstream of the yarn storage device 17. However, the first valve 77 can also be opened at times other than those described above. Alternatively, the first valve 77 can be omitted, and the suction device 49 can always generate a suction flow. The suction device 49 can be used not only for restraining the yarn end 7t when the spinning 7 is disconnected upstream of the yarn storage device 17, but also for other purposes.

[0110] Alternatively, a plate-shaped guide for guiding the spinning 7 can be disposed separately from the suction device 49, upstream of the yarn accumulation roller 41 and downstream of the yarn monitoring device 15. This plate-shaped guide can, for example, be constructed from a plate-shaped component. The plate-shaped guide guides the spinning 7 to the yarn inlet portion 79 of the yarn accumulation roller 41 by contacting the spinning 7.

[0111] When the spinning 7 is partially disconnected, for example, on the spinning device 13, the behavior of the yarn end 7t on the package 9 side of the spinning 7 becomes unstable. The plate-shaped portion of the plate-shaped guide prevents this yarn end 7t from moving irregularly toward the yarn storage roller 41 side. This restriction prevents, for example, the yarn end 7t of the spinning 7 from becoming entangled with the spindle wing 45. Figure 4 As shown, after the spinning 7 is disconnected, the yarn accumulation roller 41 continues to rotate in the forward direction. At this time, the plate-shaped guide causes the yarn end 7t in the spinning 7 on the package 9 side to pass through the plate-shaped guide and be wound onto the yarn accumulation roller 41.

[0112] The plate-shaped guide contacts the spinning yarn 7 for guidance. Therefore, when the spinning yarn 7 breaks off upstream of the yarn storage device 17, and the yarn storage roller 41 rotates in the positive direction to wind the spinning yarn 7 as described above, the plate-shaped guide provides resistance against the movement of the spinning yarn 7. As a result, since tension is applied to the spinning yarn 7 between the yarn storage roller 41 and the plate-shaped guide, the spinning yarn 7 is stably guided to the yarn guide portion 79. Therefore, the yarn end 7t of the spinning yarn 7 is neatly wound around the yarn storage roller 41.

[0113] The plate-shaped guide can also be positioned near the outer periphery of the yarn storage roller 41.

[0114] Next, regarding Figure 1 The control related to the operation of the yarn removal lever 51 shown will be explained.

[0115] In this embodiment, the yarn removal rod 51 performs a yarn removal operation when the spinning 7 finishes unwinding from the yarn accumulation roller 41. Hereinafter, this yarn removal operation may be referred to as the first yarn removal operation. The timing of the first yarn removal operation is after the point at which the yarn end 7t of the spinning 7 leaves the yarn accumulation roller 41. The timing of the first yarn removal operation may be referred to as the first time point.

[0116] The first yarn removal operation will be described in detail. The unit controller 25 controls the winding device 21 so that the rotation of the package 9 stops when it is determined that the unwinding of the spinning 7 from the yarn storage roller 41 has ended. At approximately the same time that the rotation of the package 9 stops, the unit controller 25 controls the yarn storage device 17 so that the yarn removal lever 51 moves from the standby position to the yarn removal position.

[0117] After the yarn 7 wound on the yarn storage roller 41 has just been completely unwound, the yarn end 7t of the yarn 7 on the package 9 side passes near the spindle 45 and moves downstream while leaving the yarn storage roller 41. During this process, there is a possibility that the free yarn end 7t or its nearby portion may come into contact with the spindle 45 and become entangled. In this embodiment, in this case, by performing the first yarn removal operation described above, the yarn end 7t or its nearby portion can be removed from the spindle 45. Furthermore, the timing of the movement of the yarn removal rod 51 is not particularly limited, and can be any time as long as it is before the yarn splicing device 19 performs the splicing.

[0118] The first yarn removal action is not necessarily required. For example, a sensor can be provided to detect whether the spinning yarn 7 is entangled with the spindle 45, and the first yarn removal action can be performed only if the sensor detects entanglement of the spinning yarn 7. Alternatively, the first yarn removal action can be omitted. Furthermore, in this embodiment, the first yarn removal action is performed at the point when it is assumed that the spinning yarn 7 has completely unwound from the yarn accumulation roller 41, without knowing whether the spinning yarn 7 has actually unwound from the yarn accumulation roller 41.

[0119] The travel distance (first action amount) of the yarn removal lever 51 when performing the first yarn removal action is different from the travel distance (second action amount) of the yarn removal lever 51 when performing the second yarn removal action (described later) in other cases. In other words, the yarn removal position of the spindle 45 is different in the two cases.

[0120] In other cases, such as during a series of yarn-receiving actions after the spinning 7 has broken, the yarn 7 from the feeding device 23 is guided to the yarn-receiving device 19 by the guiding device 57. At this time, the yarn 7 guided by the guiding device 57 hooks onto the rotating spindle 45, and the winding of the yarn 7 onto the yarn storage roller 41 begins. After a predetermined amount (length) of the yarn 7 is wound onto the yarn storage roller 41, the unit controller 25 moves the yarn removal lever 51 from the standby position to the yarn removal position. Hereinafter, this yarn removal action may be referred to as the second yarn removal action. Thus, the yarn 7 can be removed from the spindle 45, and the guiding device 57 draws away the yarn 7 wound onto the yarn storage roller 41 at the start of spinning. Afterward, the yarn removal lever 51 returns to the standby position, thereby hooking the yarn 7 onto the spindle 45 and winding it onto the yarn storage roller 41. Subsequently, the yarn 7 is joined to the yarn 7 already prepared by the catcher 83 on the package 9 side via the yarn splicing device 19. Hereinafter, the point in time at which the second yarn removal operation is performed may be referred to as the second time point. The second time point differs from the first time point described above.

[0121] Compared to the case where the yarn 7 contacts the middle of the spinning process, entanglement between the spindle 45 and the spinning 7 is more likely to occur when the spindle 45 contacts the free yarn end 7t. Therefore, in this embodiment, the first action amount is set to be greater than the second action amount. In other words, the yarn removal position in the case of the first yarn removal action is a position away from the spindle 45, compared to the yarn removal position in the case of the second yarn removal action. Thus, even if the yarn end 7t is entangled in the spindle 45, the yarn end 7t can be reliably removed from the spindle 45 by the yarn removal rod 51.

[0122] Next, the treatment of the yarn end of the spinning 7 on the package 9 side after the spinning 7 is disconnected between the yarn feeding device 23 and the yarn storage device 17 and after the spinning 7 is unwound from the yarn storage roller 41 will be described.

[0123] like Figure 5 As shown, the spinning unit 1 includes a detection device 81 capable of detecting the yarn end 7t of the spun yarn 7 on the package 9 side. The detection device 81 can detect the yarn end 7t located between the yarn storage device 17 and the winding device 21 after unwinding from the yarn storage roller 41. In this embodiment, the detection device 81 is a sensor disposed downstream of the yarn storage roller 41 in the yarn travel direction. The detection device 81 is disposed closer to the yarn storage device 17 than the winding device 21 in the yarn travel direction.

[0124] In this embodiment, the detection device (sensor) 81 is an optical reflective sensor. The structure of the detection device 81 is arbitrary; for example, the detection device 81 can also be a capacitive proximity sensor or a transmissive sensor.

[0125] The detection device 81 is positioned downstream of the guide member 55. Specifically, the detection device 81 is positioned between the guide member 55 and the yarn receiving device 19 in the yarn feeding direction. The detection device 81 is located near the guide member 55. The guide member 55 guides the path of the spinning 7 near the detection device 81.

[0126] With the spinning 7 wound on the yarn storage roller 41, and with the spinning 7 taut between the guide 55 and the winding device 21, the spinning 7 moves along... Figure 5 The double-dotted line indicates the existence of the spinning path 7 (part of the yarn path) 111. The detection device 81 is configured to face an appropriate position on the spinning path 7 111 to detect whether spinning 7 is present at that position.

[0127] Therefore, when the spinning 7 is in a continuous state between the yarn feeding device 23 and the winding device 21, the spinning 7 exists along the path 111, and thus the detection device 81 detects the presence of the spinning 7. After the spinning 7 is disconnected, when the yarn end 7t of the spinning 7 on the package 9 side is downstream of the detection device 81, the detection device 81 does not detect the spinning 7.

[0128] Even when the yarn end 7t of the spinning 7 on the package 9 side is upstream of the detection device 81, the detection device 81 does not detect the spinning 7 if the spinning 7 is not wound on the yarn accumulation roller 41. This is because the spinning 7, unable to maintain tension, leaves the path 111 and is sucked in by the capturing device 83 (described later). Thus, the detection device 81 detects almost the same thing as whether the spinning 7 exists in the path 111 of the spinning 7 and whether the yarn end 7t exists between the yarn accumulation roller 41 and the winding device 21.

[0129] Furthermore, the detection device 81 can be configured at a position where the spinning 7 is stable. For example, the detection device 81 can be configured at any position opposite the yarn accumulation roller 41 and downstream of the axial center of the yarn accumulation roller 41, or it can be configured near the suction device 49 (adjacent to the yarn accumulation roller 41 in a direction intersecting the axial direction of the yarn accumulation roller 41). Additionally, the yarn end 7t of the spinning 7 on the package 9 side detected by the detection device 81 does not only refer to the portion where the spinning 7 is completely finished, but also includes that portion and its surrounding area.

[0130] Spinning unit 1 has a capturing device 83 for capturing the spun yarn 7 located downstream of yarn storage roller 41. The capturing device 83 is arranged between yarn storage device 17 and winding device 21 in the yarn travel direction. In this embodiment, as... Figure 1 As shown, the capturing device 83 is positioned in the yarn feeding direction between the yarn storage device 17 and the yarn receiving device 19, and near the detection device 81. The capturing device 83 is positioned closer to the yarn storage device 17 in the yarn feeding direction than the winding device 21.

[0131] When the spinning 7 breaks off upstream of the yarn storage device 17 in the yarn direction, the capturing device 83 attracts and captures the yarn end 7t of the spinning 7 on the package 9 side. Alternatively, when attracting and capturing the yarn end 7t, the capturing device 83 may not first attract the portion of the spinning 7 that has completely ended. In other words, it is also possible that the capturing device 83 first attracts the portion of the spinning 7 that is close to the yarn end 7t, and continues to attract, resulting in the attraction of the yarn end 7t.

[0132] The capture device 83 includes a tube 85. In this embodiment, the capture device 83 also includes an air intake device 87, which generates an air intake flow by being supplied with compressed air.

[0133] The tube 85 has a cylindrical shape. The tube 85 is connected to an attraction source 75, which serves as a negative pressure source. Therefore, the capturing device 83 can generate an attraction airflow inside the tube 85. An air suction device 87 is provided at one end of the tube 85 along its long side. The air suction device 87 has a capturing opening 89 for attracting the yarn end 7t of the spun yarn 7 on the package 9 side. The capturing opening 89 is configured to face the yarn path formed between the yarn storage device 17 and the winding device 21. Figure 5 The yarn path 111 of the spinning unit 7 is opened. Furthermore, the relative position of the capturing opening 89 with respect to the yarn path is not particularly limited; it can be located downstream of the yarn accumulation roller 41 and near the yarn path. In this embodiment, the capturing opening 89 is fixedly provided in the spinning unit 1.

[0134] Compressed air generated by compressed air source 91 is supplied to the suction device 87. The suction device 87 releases compressed air from a nozzle (not shown), and the capture opening 89 can generate an additional suction airflow in addition to the suction airflow generated by the suction source 75. A second valve 93 is provided midway through the compressed air supply path connecting the suction device 87 to the compressed air source 91. The second valve 93 is a solenoid valve used to switch whether compressed air is supplied to the suction device 87. The opening and closing of the second valve 93 is controlled by the unit controller 25. By controlling the opening of the second valve 93, a suction airflow is generated in the suction device 87 (capture device 83); by controlling the closing of the second valve 93, the suction airflow of the suction device 87 stops.

[0135] Thus, in this embodiment, the capturing device 83 is configured to include an air suction device 87. Therefore, in the capturing device 83, the airflow generated by the jet air creates a strong suction airflow through the capturing opening 89, attracting and reliably holding the yarn end 7t of the yarn 7 on the package 9 side. The capturing device 83 only needs to be able to capture the yarn end 7t of the yarn 7 on the package 9 side with a sufficiently strong suction force; it may not necessarily include an air suction device 87.

[0136] The timing at which the suction device 87 operates to capture the yarn end 7t of the yarn 7 on the package 9 side is not particularly limited. For example, the unit controller 25 may activate the suction device 87 at the point when it determines that the amount of yarn 7 remaining on the yarn accumulation roller 41 is less than a predetermined amount. The determination of the amount of yarn 7 remaining on the yarn accumulation roller 41 can be based on the detection result of the yarn detection sensor 47.

[0137] In this embodiment, when the yarn 7 on the package 9 side is wound onto the package 9, the rotation of the package 9 is controlled by the unit controller 25. Specifically, as described above, by rotating the package 9 in the forward direction, the yarn 7 (the yarn 7 on the package 9 side) is unwound from the yarn storage roller 41 downstream. After the yarn tip 7t of the yarn 7 just leaves the yarn storage roller 41 due to the unwinding of the yarn 7 from the yarn storage roller 41, the yarn tip 7t of the yarn 7 is captured by the capturing device 83. As a result, if the detection device 81 does not detect the yarn 7, the unit controller 25 stops the rotation of the package 9 in the forward direction. With this control, the rotation of the package 9 in the forward direction can be stopped before the yarn tip 7t is completely wound onto the package 9.

[0138] The package 9 then temporarily rotates in the reverse direction. As a result, a portion of the yarn 7 unwinds from the package 9 and is drawn into the capturing device 83. The yarn 7 drawn into the capturing device 83 is discarded during the splicing process by the splicing device 19. The amount by which the package 9 rotates in the reverse direction is adjusted based on the length of the yarn defect contained in the yarn 7 detected by the yarn monitoring device 15. Therefore, when the yarn defect contained in the yarn 7 on the package 9 side is short, by reducing the amount of rotation in the reverse direction of the package 9, the length of the yarn 7 drawn away by the capturing device 83 can be shortened, thus reducing the amount of discarded yarn 7.

[0139] When the package 9 is temporarily rotated in the reverse direction, assuming that the attraction force of the capturing device 83 is insufficient, the yarn 7 on the package 9 side may not unwind and may adhere to the surface of the package 9. If the package 9 is rotated in the reverse direction in this state, the yarn 7 will produce reverse winding, winding in the opposite direction to the normal direction. Reverse winding becomes the cause of failure of the yarn splicing process formed by the splicing device 19 and a reduction in the quality of the package 9. However, in this embodiment, by activating the suction device 87 in the capturing device 83, the yarn 7 can be strongly attracted and pulled from the capturing opening 89. As a result, reverse winding can be prevented.

[0140] In this embodiment, a first jetting device 97 is provided downstream of the yarn storage roller 41. The first jetting device 97 is positioned opposite the capturing device 83 (capturing opening 89) across the spinning path 111 of the yarn 7. In other words, the first jetting device 97 and the capturing device 83 (capturing opening 89) are arranged in a straight line. Therefore, the first jetting device 97 can jet air towards the capturing device 83 (capturing opening 89). The air jetted from the first jetting device 97 is directed towards the capturing opening 89 of the capturing device 83. Figure 5 The flow follows the direction of arrow 99. This blows the portion near the yarn end 7t of the yarn 7 on the package 9 side toward the capturing opening 89, thus enabling more reliable capture of the yarn end 7t formed by the capturing device 83. The timing of the first injection device 97's injection is not particularly limited. This timing could be, for example, the moment when the yarn detection sensor 47 has not detected the yarn 7, i.e., the moment when the yarn 7 is about to disappear from the yarn accumulation roller 41, or the moment when the capturing device 83 activates the suction device 87.

[0141] Compressed air generated by compressed air source 101 is supplied to the first injection device 97. The first injection device 97 injects the compressed air from the injection hole toward the path 111 of the spinning 7 (the capture opening 89 of the capture device 83). A third valve 103 is provided midway in the compressed air supply path connecting the first injection device 97 to the compressed air source 101. The third valve 103 is a solenoid valve used to switch whether compressed air is supplied to the first injection device 97. The opening and closing of the third valve 103 is controlled by the unit controller 25. By controlling the opening of the third valve 103, compressed air is injected into the first injection device 97; by controlling the closing of the third valve 103, the injection of compressed air stops. Alternatively, the spinning unit 1 may be configured to supply compressed air from a single compressed air source without separately providing compressed air sources 101 and 91.

[0142] In this embodiment, such as Figure 1 As shown, a second jetting device 105 is provided downstream of the first jetting device 97. The second jetting device 105 is fixedly installed on the spinning unit 1 or the work trolley (not shown). When the spinning 7 breaks off between the yarn storage device 17 and the winding device 21 in the yarn feeding direction, the second jetting device 105 jets compressed air to guide the yarn end 7t of the spinning 7 on the package 9 side toward the capturing device 83. The second jetting device 105 can be configured in the same way as the first jetting device 97. Thus, when the spinning 7 breaks off downstream of the yarn storage device 17 in the yarn feeding direction due to reasons such as failure of yarn splicing in the splicing device 19, by rotating the package 9 in the reverse direction and jetting compressed air from the second jetting device 105, the capturing device 83 can capture the yarn end 7t of the spinning 7 on the package 9 side. As a result, the yarn end 7t of the spinning 7 is guided to a position where it can be spliced ​​by the splicing device 19. Therefore, the spinning 7 on the package 9 side can be processed with a simple structure. Simultaneously or almost simultaneously with the start of compressed air injection from the second injection device 105, the package 9 is rotated in the reverse direction by the winding device 21. Alternatively, the second injection device 105 can be omitted.

[0143] As explained above, the spinning unit 1 of the spinning machine in this embodiment includes a yarn feeding device 23, a winding device 21, and a yarn storage device 17. The yarn feeding device 23 can supply yarn 7. The winding device 21 winds the yarn 7 supplied from the yarn feeding device 23 to form a package 9. The yarn storage device 17 is disposed midway in the yarn path (yarn travel path) formed between the yarn feeding device 23 and the winding device 21. The yarn storage device 17 has a yarn storage roller 41 and a suction device 49. The yarn storage roller 41 winds and stores the yarn 7 supplied from the yarn feeding device 23. When the yarn 7 is disconnected upstream of the yarn storage device 17 in the yarn travel direction, the suction device 49 constrains the yarn end 7t of the yarn 7 on the package 9 side relative to the upstream end region of the yarn storage roller 41 by applying air to the yarn end 7t of the yarn 7 on the package 9 side. After the spinning 7 is broken, the suction device 49 exerts an air-forming force on the spinning 7, and the winding device 21 rotates the package 9 in the direction of winding the spinning 7, that is, in the forward direction. Figure 4 At time point t5 or below, the remaining yarn 7 on the yarn accumulation roller 41 is unwound from the yarn accumulation roller 41. At the time point 7t of the yarn end 7 on the package 9 side before leaving the yarn accumulation roller 41 and being wound onto the package 9, the rotation of the package 9 in the forward direction continuing from time point t5 stops.

[0144] Therefore, after the yarn 7 is disconnected on the upstream side of the yarn storage device 17 in the yarn carrying direction, the yarn 7 on the package 9 side can be properly handled with a simple structure. The yarn end 7t of the yarn 7 on the package 9 side can be reliably constrained by air.

[0145] The spinning machine of this embodiment includes a first valve 77 and a unit controller 25. The first valve 77 switches between the generation and cessation of the airflow formed by the suction device 49. The unit controller 25 controls the first valve 77.

[0146] Therefore, the suction device 49 can generate airflow only when needed, thus achieving energy savings.

[0147] In the spinning machine of this embodiment, when the spinning 7 is disconnected on the upstream side of the yarn storage device 17 in the yarn carrying direction, the suction device 49 operates to constrain the yarn end 7t (7a) of the spinning 7 on the package 9 side relative to the upstream end region of the yarn storage roller 41. The suction device 49 has a suction port 71 opposite to the yarn storage roller 41, and uses the suction port 71 to attract the yarn end 7t (7a) of the spinning 7 remaining on the yarn storage roller 41.

[0148] Therefore, by attracting the yarn end 7t (7a) of the spinning 7 remaining on the yarn accumulation roller 41, the behavior of the spinning 7 can be stabilized. As a result, the yarn end 7t will not become entangled on the spinning 7, and thus, the unwinding of the spinning 7 remaining on the yarn accumulation roller 41 can be easily performed.

[0149] In the spinning machine of this embodiment, the yarn collecting roller 41 of the yarn collecting device 17 has a yarn guiding portion 79, which is disposed upstream of the upstream portion 80 where the yarn 7 is wound around the outer periphery of the yarn collecting roller 41. The yarn 7 supplied from the yarn feeding device 23 is guided towards the upstream portion 80 of the yarn collecting roller 41 via the yarn guiding portion 79. The suction port 71 of the suction device 49 is configured to face the yarn guiding portion 79.

[0150] Therefore, the yarn end 7t (7a) of the spinning 7 remaining on the yarn storage roller 41 can be reliably attracted by the suction port 71 of the suction device 49.

[0151] In the spinning machine of this embodiment, the yarn accumulation roller 41 accumulates the spun yarn 7 by rotating in the direction of winding the yarn 7 from upstream, i.e., the forward rotation direction. When the yarn 7 is disconnected on the upstream side of the yarn accumulation device 17 in the yarn feeding direction, the forward rotation of both the package 9 and the yarn accumulation roller 41 stops. After the forward rotation of both the package 9 and the yarn accumulation roller 41 stops, the yarn accumulation roller 41 rotates in the reverse direction.

[0152] As a result, the yarn end 7t (7a) of the spinning 7 remaining in the yarn accumulation roller 41 is unwound upstream by the reverse rotation of the yarn accumulation roller 41. Therefore, the yarn end 7t can be attracted more effectively by the suction port 71 of the suction device 49.

[0153] In the spinning machine of this embodiment, after the yarn accumulation roller 41 rotates in the reverse direction, the yarn accumulation roller 41 rotates in the forward direction.

[0154] Therefore, by having the spinning 7 attracted by the suction port 71, the yarn accumulation roller 41 rotates in the forward direction, thereby generating a winding effect of the continuous spinning 7 between the package 9 and the yarn accumulation roller 41 towards the yarn accumulation roller 41, which enables the remaining spinning 7 on the yarn accumulation roller 41 to be neatly arranged. Thus, the remaining spinning 7 on the yarn accumulation roller 41 can be smoothly unwound from the yarn accumulation roller 41.

[0155] In the spinning machine of this embodiment, the amount of rotation of the yarn accumulation roller 41 when it rotates in the reverse direction is less than the amount of rotation when it rotates in the reverse direction.

[0156] Therefore, it is possible to prevent the yarn end 7t (7c) attracted by the suction port 71 of the suction device 49 when the yarn accumulation roller 41 rotates in the reverse direction from dislodging from the suction port 71 when the yarn accumulation roller 41 rotates in the forward direction. Thus, the effect formed by the suction device 49 can continue.

[0157] In the spinning machine of this embodiment, the yarn storage device 17 has a spindle 45 and a yarn removal lever 51. The spindle 45 rotates relative to the yarn storage roller 41. The yarn 7 pulled out from the yarn storage roller 41 is hooked on the spindle 45. The yarn removal lever 51 removes the yarn path from the spindle 45 at a time point after the yarn end 7t of the yarn 7 (the yarn 7 on the package 9 side) leaves the yarn storage roller 41, i.e., at the first time point.

[0158] Therefore, even if the yarn end 7t of the spinning 7 from the yarn storage roller 41 is entangled in the spindle wing 45 when it leaves the yarn storage roller 41, the yarn end 7t can be removed from the spindle wing 45 by the yarn removal rod 51.

[0159] In the spinning machine of this embodiment, the yarn removal lever 51 is configured to perform a yarn removal operation at a second time point different from the first time point. The first amount of movement of the yarn removal lever 51 related to the yarn removal operation performed at the first time point is different from the second amount of movement of the yarn removal lever 51 related to the yarn removal operation performed at the second time point.

[0160] Therefore, even if the yarn end 7t of the spinning 7 from the yarn storage roller 41 becomes entangled in the spindle 45 when it leaves the yarn storage roller 41, the yarn end 7t can be reliably removed from the spindle 45 by a different yarn removal action.

[0161] In the spinning machine of this embodiment, the yarn feeding device 23, the winding device 21, and the yarn storage device 17 are respectively provided in multiple spinning units 1.

[0162] Therefore, the yarn feeding device 23, the winding device 21 and the yarn storage device 17 can be easily utilized.

[0163] In the spinning machine of this embodiment, each of the multiple spinning units 1 includes a drive unit for the winding device 21. When the winding device 21 includes a winding drum 63 with a traverse groove, the drive unit is a winding drum drive motor. When the winding device 21 includes a winding drum without a traverse groove and a traverse guide that is independently arranged with the winding drum and reciprocates, the drive unit is a winding drum drive motor and a traverse guide drive motor.

[0164] Therefore, it is possible to control the winding device 21 to be driven and stopped independently for each spinning unit 1.

[0165] In the spinning machine of this embodiment, each of the plurality of spinning units 1 has a drive portion of the yarn removal rod 51.

[0166] Therefore, unlike in the past, it is possible to control the yarn removal lever 51 to operate independently for each spinning unit 1.

[0167] The spinning method of this embodiment is performed by a spinning unit 1 equipped with a yarn feeding device 23, a winding device 21, and a yarn storage device 17. The yarn feeding device 23 can supply yarn 7. The winding device 21 winds the yarn 7 supplied from the yarn feeding device 23 to form a package 9. The yarn storage device 17 is disposed in the middle of the yarn path (yarn travel path) formed between the yarn feeding device 23 and the winding device 21. The spinning machine described above spins yarn while rotating the package 9 in the direction of winding the yarn 7, that is, in the forward rotation direction. The yarn storage device 17 has a yarn storage roller 41 and a suction device 49. The yarn storage roller 41 can wind and store the yarn 7 supplied from the yarn feeding device 23. When the spinning 7 breaks off upstream of the yarn storage device 17 in the yarn direction, the suction device 49 applies air to the yarn end 7t of the spinning 7 on the package 9 side, thereby constraining the yarn end 7t of the spinning 7 on the upstream end region of the yarn storage roller 41. After the spinning 7 breaks off, the suction device 49 applies air to the spinning 7, and the winding device 21 rotates the package 9 in the forward direction. Figure 4 After time point t5, the remaining yarn 7 on the yarn storage roller 41 is unwound from the yarn storage roller 41. At the time point before the yarn end 7t of the yarn 7 on the package 9 side leaves the yarn storage roller 41 and is wound into the package 9, the rotation of the package 9 in the forward direction continuing from time point t5 stops.

[0168] Therefore, after the yarn 7 on the upstream side of the yarn storage device 17 is disconnected in the yarn direction, the yarn 7 on the package 9 side can be properly processed.

[0169] The preferred embodiments of the present invention have been described above, but the above structure can be modified, for example, as follows. The above embodiments and the following variations can be appropriately combined.

[0170] Alternatively, instead of the suction device 49, a jetting device (yarn action part) can be provided that jets air around the yarn storage roller 41. This jetting device can also be configured to jet air around the circumference of the yarn storage roller 41. This jetting device can also be configured to, for example, jet air in the tangential direction of the aforementioned uppermost portion 80 of the yarn storage roller 41. The air jetting direction is... Figure 3The direction of the suction airflow at the suction port 71 shown can be the same or different. The portion of the spinning 7 on the package 9 side upstream of the yarn storage roller 41 is blown away along the jet flow. Therefore, it is possible to prevent the free yarn end 7a from contacting the spinning 7 already wound on the storage portion 41a. In this way, the jetting device can substantially constrain the spinning 7. By jetting air from the jetting device, it is also possible to provide resistance to the spinning 7 traveling in the direction of being wound on the yarn storage roller 41. Similar to the suction device 49, a first valve 77 can be provided between the compressed air source and the opening of the jetting device, and the opening and closing of this first valve 77 can be controlled by the unit controller 25.

[0171] Alternatively, a suitable clamping device (yarn action part) can be provided instead of the suction device 49, configured to clamp the yarn end 7t of the yarn 7 on the side of the package 9. The yarn 7 can also be clamped between a pair of arms or between a pair of rollers. By clamping the yarn 7, the clamping device can restrain the yarn 7 from moving. For example, by providing a vibration damper on the roller shaft, resistance to the yarn 7 traveling in the direction of being wound on the yarn storage roller 41 can also be provided.

[0172] When the roller pair is configured as the yarn working part, the roller pair can also perform the pulling action of pulling the spun yarn 7 from the spinning device 13. In this case, the yarn storage roller 41 stores the spun yarn 7 pulled out by the roller pair.

[0173] Alternatively, a brush or comb (yarn action part) for hooking the spinning yarn 7 can be provided instead of the suction device 49. By hooking the spinning yarn 7 to the brush or the like, the spinning yarn 7 can be restrained from moving.

[0174] When the spinning unit 1 is equipped with a jetting device, roller pair, brush, or comb as the yarn action part, the rotation of the yarn storage roller 41 for attracting the yarn 7 to the suction port 71 of the suction device 49 in the reverse direction can be omitted. In this case, after the spinning 7 is disconnected, the operation of the yarn action part can be maintained without stopping the rotation of the yarn storage roller 41 and / or the rotation of the package 9.

[0175] The detection device 81 can also be a sensor disposed at an end of the yarn storage roller 41 downstream of its axial center in the yarn-feeding direction, opposite to the outer peripheral surface of the yarn storage roller 41. The sensor is positioned opposite the roller surface of the yarn storage roller 41 downstream of its axial center. Alternatively, if the spinning unit 1 has a limiting mechanism that restricts the yarn path of the spun yarn 7 traveling from the yarn storage roller 41 via the spindle 45, the limiting mechanism can restrict the yarn path. The limiting mechanism can be, for example, a component disposed near the spindle 45 that can stop the rotation of the spindle 45 of the yarn storage device 17. By limiting the yarn path, the sensor can reliably detect the yarn end 7t.

[0176] The detection device 81 can also be a linear sensor. The linear sensor is positioned adjacent to the yarn storage roller 41 along its axial direction. The linear sensor faces the outer peripheral surface of the storage portion 41a. The linear sensor includes multiple detection elements arranged in a direction parallel to the axial direction of the yarn storage roller 41. The linear sensor is configured to detect a region downstream of the axial center of the yarn storage roller 41 in the yarn-carrying direction. If none of the detection elements detect the spinning 7, it can be determined that the yarn end 7t has passed the outer peripheral surface of the yarn storage roller 41.

[0177] The detection device 81 can also be a sensor located near the suction port 71 of the suction device 49. If the yarn 7 is completely unwound from the yarn storage roller 41, the yarn end 7c is pulled out from the suction port 71. Therefore, by arranging a sensor near the suction port 71, the yarn end 7t (7c) can be detected reliably.

[0178] In the above embodiment, when the yarn monitoring device 15 detects a yarn defect, spinning in the spinning device 13 stops, thereby cutting the yarn 7. Alternatively, the yarn 7 can be cut by a cutter located upstream of the yarn storage device 17.

[0179] In the case of having multiple spinning units 1, a structure with a yarn receiving trolley can be used instead of the structure in which a yarn receiving device 19 is provided in each spinning unit 1. The yarn receiving trolley can travel relative to multiple spinning units 1 and stop at the working position relative to the spinning unit 1 as needed to perform yarn receiving.

[0180] In the above embodiment, the spinning unit 1 has a layout in which the yarn path formed between the yarn feeding device 23 and the winding device 21 extends from bottom to top. However, the present invention can also be applied to spinning units 1 with a layout in which the yarn path extends from top to bottom.

[0181] In the above embodiments, the spinning machine is an air spinning machine (air jet spinning machine), but it can also be an air-jet spinning machine.

[0182] In the above embodiment, the yarn end 7t of the spun yarn 7 unwound from the yarn accumulation roller 41 is captured by the capturing device 83. However, the spinning unit 1 may not have the capturing device 83, and each device may be controlled to stop the yarn end 7t at any position between the yarn accumulation roller 41 and the package 9.

[0183] If the capture device 83 is not provided, the first spray device 97 and / or the detection device 81 may be omitted. Even if the capture device 83 is provided, the first spray device 97 may be omitted.

[0184] In the above embodiment, after the yarn end 7t of the spinning 7 is attracted and captured by the suction device 49, the yarn accumulation roller 41 is rotated in the forward direction, but this forward rotation may not be performed.

[0185] In the above embodiment, the yarn 7 on the package 9 side is joined with the yarn 7 supplied from the yarn feeding device 23 via the yarn splicing device 19. However, it is also possible for the disconnected yarn 7 to become continuous again using a known splicing method.

[0186] As can be seen from the foregoing teachings, the present invention can take many modifications and variations. Therefore, it should be understood that the present invention can be practiced in ways other than those described in this specification within the scope of the appended claims.

Claims

1. A spinning machine, comprising: A yarn feeding device that supplies yarn; A winding device for winding yarn supplied from the yarn feeding device to form a package; and A yarn storage device is disposed midway along the yarn path formed between the yarn feeding device and the winding device. The spinning machine is characterized in that... The yarn storage device has: A yarn accumulation roller that winds and accumulates the yarn supplied from the yarn feeding device; and The yarn action section, when the yarn breaks on the upstream side in the yarn feeding direction relative to the yarn storage device, constrains the yarn end on the package side relative to the upstream end region of the yarn storage roller by applying air to the yarn end of the package side. After the yarn breaks, the yarn action part acts on the yarn through air, and the winding device rotates the package in the direction of winding the yarn, i.e., the clockwise direction, causing the yarn remaining on the yarn storage roller to unwind from the yarn storage roller. At the point in time before the yarn end on the package side leaves the yarn storage roller and is wound onto the package, the forward rotation of the package stops. The working part of the yarn is an attraction device. The suction device has a suction port opposite to the yarn accumulation roller, and uses the suction port to attract the yarn ends of the yarn remaining on the yarn accumulation roller. The yarn storage roller stores yarn by rotating in the direction of winding the yarn from upstream, i.e., in the forward rotation direction. When the yarn breaks on the upstream side of the yarn feeding direction relative to the yarn storage device, the rotation in the forward direction of both the package and the yarn storage roller stops. After the package and the yarn storage rollers stop rotating in the forward direction, the yarn storage rollers rotate in the reverse direction.

2. The spinning machine according to claim 1, characterized in that, have: A reversing valve that switches between generating and stopping the airflow passing through the yarn actuating part; and A control device that controls the reversing valve.

3. The spinning machine according to claim 1, characterized in that, The yarn storage device includes a yarn guiding portion, which is located upstream of the outermost portion of the yarn wound around the outer peripheral surface of the yarn storage roller. The yarn supplied from the yarn feeding device is guided via the yarn inlet portion to the uppermost portion of the yarn storage roller. The suction port is configured to face the yarn inlet portion.

4. The spinning machine according to claim 2, characterized in that, The yarn storage device includes a yarn guiding portion, which is located upstream of the outermost portion of the yarn wound around the outer peripheral surface of the yarn storage roller. The yarn supplied from the yarn feeding device is guided via the yarn inlet portion to the uppermost portion of the yarn storage roller. The suction port is configured to face the yarn inlet portion.

5. The spinning machine according to claim 1, characterized in that, After the yarn accumulation roller rotates in the reverse direction, the yarn accumulation roller rotates in the forward direction.

6. The spinning machine according to claim 2, characterized in that, After the yarn accumulation roller rotates in the reverse direction, the yarn accumulation roller rotates in the forward direction.

7. The spinning machine according to claim 3, characterized in that, After the yarn accumulation roller rotates in the reverse direction, the yarn accumulation roller rotates in the forward direction.

8. The spinning machine according to claim 4, characterized in that, After the yarn accumulation roller rotates in the reverse direction, the yarn accumulation roller rotates in the forward direction.

9. The spinning machine according to claim 5, characterized in that, Compared to the amount of rotation when the yarn accumulation roller rotates in the reverse direction, the amount of rotation when the yarn accumulation roller rotates in the forward direction after rotating in the reverse direction is less.

10. The spinning machine according to claim 6, characterized in that, Compared to the amount of rotation when the yarn accumulation roller rotates in the reverse direction, the amount of rotation when the yarn accumulation roller rotates in the forward direction after rotating in the reverse direction is less.

11. The spinning machine according to claim 7, characterized in that, Compared to the amount of rotation when the yarn accumulation roller rotates in the reverse direction, the amount of rotation when the yarn accumulation roller rotates in the forward direction after rotating in the reverse direction is less.

12. The spinning machine according to claim 8, characterized in that, Compared to the amount of rotation when the yarn accumulation roller rotates in the reverse direction, the amount of rotation when the yarn accumulation roller rotates in the forward direction after rotating in the reverse direction is less.

13. The spinning machine according to claim 1, characterized in that, The yarn working part is a jetting device that sprays air around the yarn storage roller.

14. The spinning machine according to any one of claims 1 to 13, characterized in that, The yarn storage device has: A yarn-hanging component, which rotates relative to the yarn-collecting roller and hooks the yarn pulled out from the yarn-collecting roller; and The yarn removal component performs a yarn removal action at the first time point, after the yarn end on the package side leaves the yarn accumulation roller, which is the first time point, to remove the yarn path from the yarn hanging component.

15. The spinning machine according to claim 14, characterized in that, The yarn removal component is configured to perform the yarn removal action at a second time point, different from the first time point. The first action amount of the yarn removal member associated with the yarn removal action performed at the first time point is different from the second action amount of the yarn removal member associated with the yarn removal action performed at the second time point.

16. The spinning machine according to any one of claims 1 to 13 and 15, characterized in that, The yarn feeding device, the winding device, and the yarn storage device are respectively located in multiple spinning units.

17. The spinning machine according to claim 14, characterized in that, The yarn feeding device, the winding device, and the yarn storage device are respectively located in multiple spinning units.

18. The spinning machine according to claim 16, characterized in that, Each of the plurality of spinning units has a drive unit of the winding device.

19. The spinning machine according to claim 17, characterized in that, Each of the plurality of spinning units has a drive unit of the winding device.

20. The spinning machine according to claim 16, characterized in that, In each of the plurality of spinning units, the yarn storage device includes: A yarn-hanging component, which rotates relative to the yarn-collecting roller and hooks the yarn pulled out from the yarn-collecting roller; and The yarn removal component performs a yarn removal action to remove the yarn path from the yarn holding component after the yarn end on the package side leaves the yarn accumulation roller. Each of the plurality of spinning units has a drive portion of the yarn removal component.

21. The spinning machine according to any one of claims 17 to 19, characterized in that, In each of the plurality of spinning units, the yarn storage device includes: A yarn-hanging component, which rotates relative to the yarn-collecting roller and hooks the yarn pulled out from the yarn-collecting roller; and The yarn removal component performs a yarn removal action to remove the yarn path from the yarn holding component after the yarn end on the package side leaves the yarn accumulation roller. Each of the plurality of spinning units has a drive portion of the yarn removal component.

22. A spinning method, performed by a spinning machine, The spinning machine includes: A yarn feeding device that supplies yarn; A winding device for winding yarn supplied from the yarn feeding device to form a package; and A yarn storage device is disposed midway along the yarn path formed between the yarn feeding device and the winding device. The spinning method is characterized in that... The yarn storage device has: A yarn accumulation roller that winds and accumulates the yarn supplied from the yarn feeding device; and The yarn action section, when the yarn breaks on the upstream side in the yarn feeding direction relative to the yarn storage device, constrains the yarn end on the package side relative to the upstream end region of the yarn storage roller by applying air to the yarn end of the package side. After the yarn breaks, the yarn action section applies air to the yarn, and the winding device rotates the package in the direction of winding the yarn, i.e., the forward rotation direction, causing the yarn remaining on the yarn storage roller to unwind from the yarn storage roller. At the point in time before the yarn end on the package side leaves the yarn storage roller and is wound onto the package, the forward rotation of the package stops. The working part of the yarn is an attraction device. The suction device has a suction port opposite to the yarn accumulation roller, and uses the suction port to attract the yarn ends of the yarn remaining on the yarn accumulation roller. The yarn storage roller stores yarn by rotating in the direction of winding the yarn from upstream, i.e., in the forward rotation direction. When the yarn breaks on the upstream side of the yarn feeding direction relative to the yarn storage device, the rotation in the forward direction of both the package and the yarn storage roller stops. After the package and the yarn storage rollers stop rotating in the forward direction, the yarn storage rollers rotate in the reverse direction.

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