Spinning machinery

Abstract

The present invention provides a spinning machine that can properly process the yarn on the package side by a simple structure when the yarn on the upstream side of the yarn storage device in the yarn travel direction is broken. The spinning machine includes a yarn feeding device (23), a winding device (21), a yarn storage device (17), a detection device (81), a catching device (83) and a first injection device (97). The yarn storage device has a yarn storage roller (41) for storing the spun yarn (7) from the yarn feeding device. When the spun yarn on the upstream side of the yarn storage device in the yarn travel direction is broken, the detection device detects the yarn end (7t) of the spun yarn on the package (9) side. The catching device catches the yarn end of the spun yarn on the package side on the downstream side of the yarn storage device. The first injection device injects air toward the catching device. Based on the detection result of the detection device, the winding of the spun yarn on the package side is stopped so that the yarn end of the spun yarn on the package side stops at a position where it can be caught by the catching device.

Description

Technical Field

[0001] The present invention relates to spinning machinery. Background Art

[0002] Conventionally, there is known a spinning machine including a yarn feeding device, a winding device, and a yarn storage device. Patent Documents 1 and 2 disclose such a spinning machine, respectively.

[0003] The spinning machine disclosed in Patent Document 1 includes a drafting device and an air-spinning machine (yarn feeding device), a winding device for forming a package, and a yarn storage device having a yarn storage roller. The yarn storage roller is located downstream of the spinning device (part of the yarn feeding device) in the direction of yarn travel, and temporarily stores the spun yarn by winding the spun yarn around its outer circumference and rotating. The spinning machine includes a progress detection sensor located downstream of the yarn storage roller in the direction of yarn travel. The progress detection sensor is capable of detecting at least one of whether the spun yarn is traveling in a yarn path or whether it has stopped traveling, downstream of the yarn storage roller.

[0004] The spinning machine of Patent Document 2 includes a drafting device and an air-spinning machine (yarn feeding device), a winding device for generating a package, and a yarn storage device. The yarn storage device includes a yarn storage roller that can temporarily store the yarn fed from the air-spinning machine (a part of the yarn feeding device) by winding it. The spinning machine includes a first suction device that is arranged downstream of the yarn storage roller in the direction of yarn travel. When the yarn breaks between the yarn storage device and the winding device in the direction of yarn travel (on the downstream side of the yarn storage device in the direction of yarn travel), the first suction device sucks the downstream end of the broken yarn in order to remove the broken yarn remaining on the yarn storage roller.

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2013-067891

[0006] Patent Document 2: Japanese Patent Application Laid-Open No. 2019-108629

[0007] In the configurations of Patent Documents 1 and 2, if the yarn breaks upstream of the yarn storage device in the direction of yarn travel, a portion of the yarn on the winding device side can be wound into a package by the winding device. However, this configuration may not allow for proper handling of the yarn on the winding device side (the yarn on the package side). For example, if the yarn end of the yarn on the package side is completely wound into the package, it may be impossible to properly pull the yarn end out of the package. Summary of the Invention

[0008] An object of the present invention is to provide a spinning machine that can appropriately handle the yarn on the package side with a simple structure when the yarn breaks upstream of a yarn storage device in the yarn traveling direction.

[0009] According to aspects of the present invention, a spinning machine having the following structure is provided. Specifically, the spinning machine includes a yarn feeding device, a winding device, a yarn storage device, a detection device, a catching device, and a first jet 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 a yarn travel path formed between the yarn feeding device and the winding device. The yarn storage device includes a yarn storage roller that winds and stores the yarn supplied from the yarn feeding device. When the yarn breaks upstream of the yarn storage device in the yarn travel direction, the detection device detects the yarn end of the package. The catching device catches the yarn end of the package downstream of the yarn storage device. The first jet device sprays air toward the catching device. Based on the detection result of the detection device, the winding of the yarn on the package is stopped so that the yarn end of the package stops at a position where it can be caught by the catching device.

[0010] In this specification, the detection device detecting the yarn end of the package includes detecting the yarn end at a completely ended portion and detecting a yarn region near the yarn end portion.

[0011] Thus, the detection device detects the yarn end of the package-side yarn, making it easier for the package to stop rotating at a position where the yarn end of the package-side yarn can be captured by the capture device. Therefore, if the yarn breaks upstream of the yarn storage device in the direction of yarn travel, the package-side yarn can be handled with a simple structure. By injecting air from the first injection device, the yarn end of the package-side yarn can be guided toward the capture device. Consequently, the yarn end can be reliably captured by the capture device.

[0012] In the above spinning machine, it is preferable that the detection device is a sensor arranged to detect the outer peripheral surface of the yarn storage roller.

[0013] Thus, the winding of the yarn on the package side can be stopped at an appropriate timing.

[0014] In the above spinning machine, preferably, the sensor is a reflection type sensor.

[0015] Thus, the yarn end of the yarn on the package side can be easily detected.

[0016] The spinning machine may also have the following configuration: the detection device is a sensor configured to detect a region downstream of the yarn storage roller in the yarn traveling direction. The spinning machine further includes a limiting unit. The limiting unit limits a yarn path of the yarn unwound from the yarn storage roller, included in the yarn traveling path, at a time before the sensor detects the yarn end of the package-side yarn.

[0017] In this case, the sensor can detect the yarn end while the yarn traveling path of the package yarn is stable. Therefore, the yarn end of the package yarn can be reliably detected.

[0018] In the above spinning machine, the detection device can be configured as a line sensor.

[0019] In this case, the yarn end of the yarn on the package side can be reliably detected.

[0020] In the above spinning machine, the catching device preferably includes an air suction device that generates a suction flow by supplying compressed air.

[0021] Thus, the air flow generated by the air jet can strongly attract the yarn in the catching device. Therefore, when the package is rotated in the reverse direction to unwind the yarn from the package, the yarn on the package side can be prevented from being wound back in the opposite direction relative to the package.

[0022] In the above spinning machine, the first injection device is preferably arranged on the opposite side of the catching device across a portion of the yarn travelling path.

[0023] Thus, the yarn end can be reliably caught by the catching device.

[0024] The spinning machine preferably has the following structure: the catching device includes a cylindrical tube having a catching opening formed at a front end, the catching opening being fixed, and the tube being connected to a suction source.

[0025] This makes it possible to achieve a simple structure of the capturing device.

[0026] The spinning machine preferably has the following configuration: Specifically, the spinning machine includes a guide member and a yarn detection sensor. The guide member is disposed downstream of the yarn storage roller and guides the yarn wound into the package. The yarn detection sensor is disposed downstream of the guide member and detects the yarn wound into the package.

[0027] Thus, the yarn can be reliably detected on the downstream side of the guide member.

[0028] The spinning machine preferably has the following structure: that is, the spinning machine includes a connecting device that connects the yarn on the yarn feeding device side and the yarn on the package side when the yarn is disconnected upstream of the yarn storage device in the yarn traveling direction.

[0029] Thus, even if the yarn is broken on the upstream side of the yarn storage device in the yarn travelling direction, the yarn connection process can be performed to resume the winding of the package.

[0030] In the spinning machine, the catching device is preferably arranged between the yarn storage device and the yarn connecting device in the yarn travelling direction, and is preferably arranged closer to the yarn storage device than the winding device in the yarn travelling direction.

[0031] Thus, if the yarn breaks on the upstream side of the yarn storage device in the direction of yarn travel, the yarn on the package side can be easily caught by the catching device located near the yarn storage device. In addition, since the yarn on the package side is caught by the catching device between the yarn storage device and the splicing device, the caught yarn on the package side can be smoothly spliced ​​by the splicing device.

[0032] The spinning machine preferably has the following configuration: that is, the spinning machine includes a second injection device that injects air to guide the yarn end of the yarn on the package side toward the catching device when the yarn breaks downstream of the yarn storage device in the yarn traveling direction.

[0033] Thus, even if the yarn end of the package-side yarn is located downstream of the catching device, the package-side yarn can be pulled out from the package and caught by the catching device.

[0034] The spinning machine preferably has the following configuration. Specifically, the spinning machine includes a yarn monitoring device capable of detecting yarn defects contained in the yarn supplied from the yarn feeding device. If the yarn monitoring device detects a yarn defect, the yarn is cut upstream of the yarn storage device in the yarn travel direction. After the yarn on the package side is captured by the capture device, the winding device rotates the package in a direction opposite to the winding direction of the package, so that the capture device removes a length of yarn required to remove the yarn defect from the captured yarn.

[0035] Thus, the yarn defect detected by the yarn monitoring device can be reliably removed by the catching device. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a side view showing the structure of a spinning unit included in a spinning machine according to one embodiment of the present invention.

[0037] Figure 2 It is the control block diagram of the textile unit.

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

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

[0040] Figure 5 It is a perspective view illustrating a detection device and a capture device.

[0041] Description of reference numerals:

[0042] 1…spinning unit; 7…spinning yarn (yarn); 9…package; 17…yarn storage device; 19…wiring device; 21…winding device; 23…yarn feeding device; 55…guide (guide component); 81…detection device; 83…capturing device; 87…suction device; 97…first injection device; 105…second injection device. DETAILED DESCRIPTION

[0043] Reference Figure 1 as well as Figure 2 In the following description, "upstream" and "downstream" refer to upstream and downstream, respectively, in the running direction (yarn running direction) of the yarn (specifically, the sliver 3, the fiber bundle 5, and the spun yarn 7).

[0044] The spinning machine has at least one spinning unit 1 and a machine control device (not shown). The machine control device manages one or more spinning units 1. The spinning unit 1 transports the fiber bundle 5 to the downstream side of the yarn travel direction through the drafting device 11, and the spinning device 13 spins the fiber bundle 5 sent from the drafting device 11 to form a spun yarn 7, which is then wound by the winding device 21 to form a package 9. Figure 5 The middle figure shows a cylindrical package 9, but the spinning machine may be configured so that the spun yarn 7 is wound into a conical package 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 connecting 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 connecting device 19, and the winding device 21 are arranged in this order from the upstream side to the downstream side in the yarn running direction.

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

[0047] The drafting device 11 stretches (drafts) the sliver 3 supplied from a can (not shown) or the like to produce a fiber bundle 5. The drafting device 11 sandwiches the sliver 3 between a plurality of drafting rollers and a plurality of opposing rollers facing the slivers 3, rotates the drafting rollers in the drafting direction, and conveys the sliver 3 downstream, stretching the sliver 3 to a predetermined fiber amount (or thickness), thereby producing a fiber bundle 5.

[0048] The drafting device 11 includes a rear roller 31, side rollers 33, an intermediate roller 35, and a front roller 37 as a plurality of drafting rollers. These rollers 31, 33, 35, and 37 are arranged in order from upstream to downstream. A rubber apron 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 from the drafting device 11 to produce spun yarn 7. In this embodiment, an air-type spinning device that twists the fiber bundle 5 using a swirling airflow is employed as the spinning device 13.

[0050] In the spinning unit 1 (spinning machine), the drafting device 11 and the spinning device 13 constitute a yarn feeding device 23 capable of supplying the spun yarn 7. The spun yarn 7 produced by the yarn feeding device 23 travels from the yarn feeding device 23 toward the winding device 21. A yarn channel (yarn traveling path) is formed between the yarn feeding device 23 and the winding device 21, through which the spun yarn 7 travels.

[0051] A yarn monitoring device 15 is provided downstream of the spinning device 13. The yarn monitoring device 15 monitors the presence and quality (thickness and / or presence of foreign matter) of the spun yarn 7. The yarn monitoring device 15 performs non-contact monitoring using a transmissive optical sensor. If the yarn monitoring device 15 detects a yarn defect in the spun yarn 7 (e.g., an abnormality in the thickness of the spun yarn 7), it transmits 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 the spun yarn 7. The unit controller 25 stops the drafting operation of the drafting device 11 when stopping spinning in the spinning device 13. Furthermore, simultaneously with the cutting of the spun yarn 7, or after a predetermined time has passed since the spun yarn 7 was cut, the unit controller 25 stops the winding operation of the winding device 21 and the pulling operation of the yarn storage device 17.

[0053] The yarn monitoring device 15 is not limited to a transmissive optical sensor, and may also use a capacitance sensor to monitor the presence and quality of the spun yarn 7. Instead of stopping spinning to cut the spun yarn 7, a cutting device provided near the yarn monitoring device 15 may be used to cut the spun yarn 7.

[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 travel 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 flyer (yarn hooking member) 45, a yarn detection sensor 47, a suction device (yarn action unit) 49, and a yarn tail removal lever (yarn tail removal member) 51.

[0055] The yarn storage roller 41 is capable of winding and storing the spun yarn 7 supplied from the yarn feeding device 23. The spun yarn 7 is stored while being wound around the outer circumference of the yarn storage roller 41. The yarn storage roller 41 is rotated in the forward or reverse direction by a yarn storage motor 43. In this embodiment, since a conventional pair of feed rollers is not provided between the spinning device 13 and the yarn storage device 17, the yarn storage device 17 performs the pulling operation to pull the spun yarn 7 from the spinning device 13.

[0056] The yarn storage motor 43 is configured as a forward and reverse-rotating electric motor. 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 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 yarn pulling operation during normal spinning in the spinning unit 1.

[0057] The flyer 45 is mounted on the downstream end (front end) of the yarn storage roller 41. The flyer 45 is configured to be in contact with the spun yarn 7 pulled out from the yarn storage roller 41. The flyer 45 is supported so as to be rotatable relative to the yarn storage roller 41. A permanent magnet is mounted on either the flyer 45 or the yarn storage roller 41, and a hysteresis material is mounted on the other. The magnetic device generates a torque that overcomes the relative rotation of the flyer 45 relative to the yarn storage roller 41. Therefore, in a state where the spun yarn 7 is hung on the flyer 45, only when a force that overcomes the torque is applied to the flyer 45 (i.e., when a tension greater than a specified value is hung on the spun yarn 7), the flyer 45 can rotate relative to the yarn storage roller 41, thereby unwinding the spun yarn 7 wound on the yarn storage roller 41. On the other hand, in a state where the force that overcomes the torque is not hung on the flyer 45, the yarn storage roller 41 and the flyer 45 rotate as a whole, and the spun yarn 7 is stored on the yarn storage roller 41.

[0058] In this manner, the yarn storage device 17 operates to unwind the yarn 7 when the tension of the downstream yarn 7 increases, and to stop unwinding the yarn 7 when the tension of the downstream yarn 7 decreases (so that the yarn 7 slackens). Thus, the yarn storage device 17 can eliminate slack in the yarn 7 and apply appropriate tension to the yarn 7. Furthermore, since the flyer 45 operates to absorb fluctuations in the tension of the yarn 7 between the yarn storage device 17 and the winding device 21 as described above, this tension fluctuation can be prevented from affecting the yarn 7 between the spinning device 13 and the yarn storage device 17.

[0059] The yarn storage device 17 may not include such a magnetic device but may include an electromagnet instead of a permanent magnet. Alternatively, the yarn storage device 17 may not include a magnetic device but may include a motor for rotationally driving the flyer 45.

[0060] The yarn detection sensor 47 is a sensor that detects the amount of yarn stored in the yarn storage roller 41. The yarn detection sensor 47 is configured to detect the spun yarn 7 at a predetermined position on the yarn storage roller 41. By detecting the presence of the spun yarn 7 at this predetermined position, it can determine whether the amount of yarn stored is at least a predetermined amount. The yarn detection sensor 47 can be, for example, an optical reflective sensor, an electrostatic capacitive proximity sensor, or a transmissive sensor. When the spun yarn 7 is wound into the package 9, the unit controller 25 controls the rotational speed of the winding drum 63 of the winding device 21 based on the detection results of the yarn detection sensor 47, adjusting the rotational speed so that the amount of yarn stored in the yarn storage roller 41 is within a predetermined range.

[0061] The suction device 49 is positioned laterally of the yarn storage roller 41, in a direction intersecting the axial direction of the yarn storage roller 41. The suction device 49 includes a hollow tube 73. The suction device 49 is connected to a suction source (not shown) serving as a negative pressure source, and is capable of generating a suction airflow within the tube 73. If the spun yarn 7 breaks upstream of the yarn storage device 17 in the yarn traveling 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. This allows the suction device 49 to suck and capture the portion of the spun yarn 7 on the package 9 side that is upstream of the yarn storage roller 41.

[0062] The yarn removing lever 51 is arranged near the yarn storage roller 41. The yarn removing lever 51 can remove the spun yarn 7 (yarn traveling path) from the flyer 45. The yarn removing lever 51 is movable between a standby position and a yarn removing position. Figure 1The figure shows the yarn removing lever 51 in the standby position, and the arrow indicates the direction of movement of the yarn removing lever 51 from the standby position to the yarn removing position. During its movement from the standby position to the yarn removing position, the yarn removing lever 51 passes through the space downstream of the yarn storage roller 41. At this time, if the yarn 7 is caught on the flyer 45, the yarn removing lever 51 acts on the yarn 7, removing the yarn 7 from the flyer 45.

[0063] In this embodiment, the yarn removing lever 51 is a single-hammer driven type. That is, the yarn removing lever 51 is provided in each spinning unit 1, and a separate driving unit (motor or cylinder, etc.) is provided for each yarn removing lever 51. Therefore, the yarn removing lever 51 can operate independently of the yarn removing levers 51 of other spinning units 1.

[0064] A guide (guide member) 55 is provided downstream of the yarn storage roller 41 to guide the spun yarn 7 wound into the package 9. The guide 55 can regulate the path of the spun yarn 7 at a position downstream of the yarn storage roller 41. The guide 55 is, for example, a U-shaped portion or a partially cut-out circular portion formed on a plate-shaped member fixed to the spinning unit 1.

[0065] A splicing device 19 is provided downstream of the guide 55 (i.e., downstream of the yarn storage device 17). When the spun yarn 7 is disconnected between the yarn feeding device 23 and the winding device 21 in the yarn travel direction, the splicing device 19 connects the spun yarn 7 from the yarn feeding device 23 with the spun yarn 7 from the package 9. In this embodiment, the splicing device 19 is a splicing device that uses a swirling airflow to twist the yarn ends together. Alternatively, a mechanical knotter, for example, may be used as the splicing device 19.

[0066] The spinning unit 1 is provided with a guide device 57. When the spun yarn 7 is disconnected upstream of the yarn storage device 17, the guide device 57 guides the spun yarn 7 from the yarn feeding device 23 to the wiring device 19. The guide device 57 is supported so as to be rotatable at one end in the longitudinal direction thereof and is rotatable in the vertical direction. The guide device 57 includes a hollow member and is connected to a suction source (not shown). The guide device 57 is capable of generating a suction airflow at a suction port 59 provided at the other end in the longitudinal direction thereof. By rotating downward, the guide device 57 is capable of capturing the yarn end of the spun yarn 7 from the yarn feeding device 23 through the suction port 59. After capturing the yarn end of the spun yarn 7 from the yarn feeding device 23, the guide device 57 is capable of rotating upward to guide the yarn end to the wiring device 19.

[0067] The yarn end of the spun yarn 7 from the yarn feeding device 23 is guided to the splicing device 19 by the guide device 57. As will be described later, the spun yarn 7 from the package 9 is caught by the catching device 83 and guided to the splicing device 19. In this state, the splicing device 19 is driven to perform splicing so that the spun yarn 7 from the yarn feeding device 23 is connected to the spun yarn 7 from the package 9. Thus, even if the spun yarn 7 becomes disconnected upstream of the yarn storage device 17, the spinning unit 1 can resume the stopped spinning, perform splicing, and wind the spun yarn 7 from the yarn feeding device 23 around the package 9 again.

[0068] A winding device 21 is provided downstream of the yarn storage device 17 (in this embodiment, downstream of the yarn connection device 19). The winding device 21 winds the spun yarn 7 supplied from the yarn feeding device 23 into 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. This arrangement provides a spinning unit 1 with a yarn path extending from bottom to top. The winding device 21 includes a rocker arm 61 and a winding drum 63.

[0069] The rocker arm 61 rotatably supports the winding tube 67 for winding the spun yarn 7. The rocker arm 61 is rotatable with its base as the center of rotation. Thus, in the winding device 21, even if the diameter of the package 9 increases due to the spun yarn 7 being wound around the winding tube 67, the winding of the spun yarn 7 can be continued appropriately.

[0070] The winding drum 63's drive motor (not shown) is controlled by the unit controller 25, causing the winding drum 63 to rotate while in contact with the outer circumference of the winding tube 67 or the package 9. Traverse grooves (not shown) are formed on the outer circumference of the winding drum 63. These grooves allow the spun yarn 7 to move laterally to a predetermined width. Thus, the winding device 21 can wind the spun yarn 7 around the winding tube 67 to form the package 9 while moving the spun yarn 7 laterally.

[0071] In this embodiment, the winding device 21 is a single-hammer drive type. Specifically, the winding device 21 provided in each spinning unit 1 has a separate drive unit (winding drum drive motor), which rotates the winding drum 63 and, in turn, the package 9. The winding device 21 can independently change the rotational motion of the package 9 relative to the winding devices 21 of other spinning units 1.

[0072] Instead of the winding drum 63 having the traverse groove, the winding device 21 may have a known structure including a winding drum without the traverse groove and a lateral guide provided independently of the winding drum and reciprocating.

[0073] Next, refer to Figure 3 as well as Figure 4The following describes how the spun yarn 7 on the package 9 side is handled when the spun yarn 7 is disconnected between the yarn feeding device 23 and the yarn storage device 17.

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

[0075] In the spinning unit 1, when the spun yarn 7 is supplied from the yarn feeding device 23 and the package 9 rotates in the forward direction, the spun yarn 7 may be cut according to the monitoring results of the yarn monitoring device 15 as described above. In this case, the spun yarn 7 is disconnected between the yarn feeding device 23 and the yarn storage device 17 in the yarn traveling direction. In this embodiment, the supply operation of the yarn feeding device 23 is stopped, thereby cutting the spun yarn 7. Then, the withdrawal operation of the yarn storage device 17 and the winding operation of the winding device 21 are stopped immediately or after a predetermined time.

[0076] At the time point when the spun yarn 7 is broken, such as at Figure 1 As shown by the dotted line, the yarn end 7t of the spun yarn 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 FIG. Figure 3 In this state, the winding device 21 performs a winding operation at a slower speed than before the spun yarn 7 is broken, thereby unwinding the spun yarn 7 remaining on the storage roller 41 from the storage roller 41 to the winding device 21. The operation of the suction device 49 at this time will be described later.

[0077] The spun yarn 7 is unwound from the yarn storage roller 41, and the unwinding of the spun yarn 7 from the yarn storage roller 41 is completed. When the spun yarn 7 is completely unwound from the yarn storage roller 41, its end portion leaves the yarn storage roller 41 and is caught by the catching device 83 shortly thereafter. The change in the yarn path associated with the catching of the spun yarn 7 by the catching device 83 is detected by the detection device 81. The catching device 83 and the detection device 81 will be described in detail later.

[0078] When the detection device 81 no longer detects the spun yarn 7, the unit controller 25 stops the forward rotation of the package 9 by the winding device 21. As a result, the yarn end 7t of the spun 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] Thus, if the spun yarn 7 is disconnected between the yarn feeding device 23 and the yarn storage device 17 in the yarn traveling direction, the spun yarn 7 on the package 9 side can be appropriately processed with a simple structure. In this embodiment, yarn defects contained in the spun yarn 7 on the package 9 side can be removed from the spun yarn 7 by the catching device 83. The position where the yarn end 7t of the spun yarn 7 on the package 9 side is caught by the catching device 83 is not particularly limited and may be any position between the yarn storage device 17 and the winding device 21 in the yarn traveling direction.

[0080] Next, the suction device 49 will be described in detail. If the spun yarn 7 is disconnected between the yarn storage device 17 and the yarn feeding device 23, the drafting operation of the drafting device 11 immediately stops. In conjunction with the cessation of the drafting operation, the withdrawal operation of the yarn storage device 17 and the winding operation of the take-up device 21 are stopped immediately or after a predetermined time. Therefore, with the yarn end 7t of the spun yarn 7 on the package 9 side positioned upstream of the yarn storage roller 41, the spun yarn 7 on the package 9 side stops while connected between the package 9 and the yarn storage device 17. The package 9 then resumes winding at a lower speed than before the disconnection due to forward rotation of the take-up device 21, and the spun yarn 7 is unwound downstream from the yarn storage roller 41. During this unwinding operation, the yarn end 7t on the upstream side of the yarn storage roller 41 is sucked and captured by the suction device 49.

[0081] Specifically, the unit controller 25 generates a suction airflow in the suction device 49, causing it to suck and capture the yarn end 7t located upstream of the yarn storage roller 41 through the suction port 71. This guides the spun yarn 7 until all the remaining spun yarn 7 on the yarn storage roller 41 is unwound downstream, while maintaining the path of the spun yarn 7 immediately upstream of the yarn storage roller 41. In other words, the suction device 49 restricts the movement of the yarn end 7t of the spun yarn 7 so that it does not become free, thereby maintaining the position of the spun yarn 7.

[0082] like Figure 3 As shown, the suction device 49 has a tube 73. The tube 73 has a suction port 71 at one end in the longitudinal direction and is connected to a suction source 75 at the other end in the longitudinal direction. The suction port 71 faces the yarn storage roller 41. A first valve 77 is provided in the middle of the tube 73 in the longitudinal direction. The opening and closing of the first valve 77 is controlled by the unit controller 25. By controlling to open the first valve 77, a suction airflow can be generated in the tube 73 of the suction device 49. By controlling to close the first valve 77, the suction airflow of the tube 73 can be stopped. If a suction airflow is generated, suction acts on the outer peripheral surface of the yarn storage roller 41, and the spun yarn 7 wound on the outer peripheral surface (the spun yarn 7 remaining on the yarn storage roller 41) is sucked from the suction port 71. The suction source 75 is, for example, provided at the end of the machine frame of the spinning machine and is shared by a plurality of spinning units 1.

[0083] The suction port 71 is arranged to face a yarn introduction portion 79 of the yarn storage device 17. The yarn introduction portion 79 is a region of the outer peripheral surface of the yarn storage roller 41 immediately before a position where the spun yarn 7 substantially starts to be wound.

[0084] The yarn introduction portion 79 will be described in detail. The yarn storage roller 41 has a cylindrical storage portion 41a, and the spun yarn 7 is spirally wound in the storage portion 41a. Figure 3 In the figure, the storage portion 41a is shown as a cylindrical shape with a constant outer diameter, but it can also be configured as a tapered shape with an outer diameter that gradually or linearly decreases as it approaches the downstream end. As the package 9 rotates in the forward direction and winds the spun yarn 7, the spun yarn 7 travels in a spiral path from upstream to downstream in the storage portion 41a of the yarn storage roller 41. The axis of the yarn storage roller 41 coincides with the axis of the spiral around which the spun yarn 7 is wound. A tapered portion 41b is formed on the yarn storage roller 41 at each end of the axis corresponding to the upstream side of the spiral. This tapered portion 41b corresponds to the yarn introduction portion 79.

[0085] Hereinafter, the axially upstream side of the yarn storage roller 41 refers to the upstream side of the spiral in the axial direction, and the axially downstream side refers to the downstream side of the spiral in the axial direction.

[0086] The tapered portion 41b is formed into a substantially conical shape with a diameter larger than that of the reservoir 41a. The diameter of the tapered portion 41b decreases as it approaches the reservoir 41a, and becomes equal to the diameter of the reservoir 41a at the portion connected to the reservoir 41a.

[0087] The yarn introduction portion 79 is arranged on the axially upstream side of the yarn storage roller 41 (at the position of the uppermost portion 80 where the spun yarn 7 is arranged and wound in the storage portion 41a). Figure 3 The spun yarn 7 from the upstream side in the yarn traveling direction is given tension by the rotation of the yarn storage roller 41 and guided to the most upstream portion 80 while being in contact with the yarn introduction portion 79 (tapered portion 41b) as needed.

[0088] By rotating the storage roller 41 while guiding the spun yarn 7 to a fixed position, the spun yarn 7 wound earlier in the storage section 41a is pressed by the subsequently wound spun yarn 7 and gradually moves axially downstream. As a result, the spun yarn 7 can be stored in the storage section 41a in an aligned state.

[0089] Reference Figure 4The timing chart specifically illustrates the rotation control of the yarn storage roller 41 and the package 9 when the spun yarn 7 breaks on the upstream side of the yarn storage roller 41. Time t0 is the time when the spun yarn 7 breaks. When the spun yarn 7 breaks, at time t1 after a predetermined time has passed from time t0, the unit controller 25 stops the forward rotation of the package 9 and the forward rotation of the yarn storage roller 41. Specifically, the unit controller 25 stops the driving of the winding drum drive motor and the driving of the yarn storage motor 43. The yarn end 7t of the spun yarn 7 on the package 9 side is wound around the yarn storage roller 41 by the forward rotation of the yarn storage roller 41 before the stop at time t1. At the time point of time t1, the yarn end 7t of the spun yarn 7 on the package 9 side is located near the most upstream portion 80.

[0090] Thereafter, at time t2, the unit controller 25 starts the reverse rotation of the yarn storage roller 41 while maintaining the state of stopping the rotation of the package 9. The reverse rotation of the yarn storage roller 41 continues until time t3.

[0091] As the yarn storage roller 41 rotates in the reverse direction, the yarn end 7t of the spun yarn 7 on the package 9 side is sucked by the suction device 49. Along with this, the spun yarn 7 is unwound from the yarn storage roller 41 to the upstream side. As described above, the suction port 71 of the suction device 49 is arranged to be opposite to the yarn introduction portion 79. Therefore, during the process of rotating the yarn storage roller 41 in the reverse direction, the yarn end 7t located near the most upstream portion 80 is easily sucked by the suction port 71. Figure 3 In FIG. 1 , the yarn end 7t in a state of being sucked into the suction device 49 is indicated by reference numeral 7c.

[0092] At time t3 when the yarn storage roller 41 is rotated in the reverse direction by a predetermined amount, the unit controller 25 stops the rotation in the reverse direction.

[0093] At the same time t3 as the reverse rotation stops, the yarn storage roller 41 starts rotating in the forward direction. The forward rotation of the yarn storage roller 41 continues until time t4. The forward rotation may also be started a predetermined time after the reverse rotation stops.

[0094] As the yarn storage roller 41 rotates in the forward direction from time t3 to time t4, a portion of the spun yarn 7 temporarily sucked into the suction device 49 is drawn out and wound around the yarn storage roller 41. Since the suction port 71 of the suction device 49 faces the yarn introduction portion 79, the spun yarn 7 drawn out from the suction device 49 is naturally guided from the yarn introduction portion 79 to the most upstream portion 80 as the yarn storage roller 41 rotates in the forward direction. Therefore, the spun yarn 7 can be well aligned in the storage portion 41a.

[0095] From time t3 to time t4, the yarn storage 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 of the yarn storage roller 41 in the reverse direction after the spun yarn 7 is broken. Therefore, at this point in time, the yarn end 7c of the spun yarn 7 on the package 9 side is not completely pulled out of the suction device 49. In other words, at time t4, the yarn end 7c remains inside the suction device 49. In other words, at this point in time, the yarn end 7c has not yet emerged from the suction port 71.

[0096] Although a portion of the spun yarn 7 is drawn out from the suction device 49 as the yarn storage roller 41 rotates in the forward direction, the suction device 49 applies a suction airflow in a direction that overcomes the direction of the drawn-out yarn. Therefore, the suction device 49 also functions as a resistance applying section, applying resistance against the yarn 7 advancing in the direction toward being wound around the yarn storage roller 41.

[0097] After the yarn storage 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 spun yarn 7 is pulled toward the package 9, and the spun yarn 7 is unwound downstream from the yarn storage roller 41. At this time, the upstream yarn end 7c is sucked into the suction device 49, preventing the yarn end 7c from becoming entangled in the unwound spun yarn 7. Consequently, the spun yarn 7 can be unwound smoothly from the yarn storage roller 41.

[0098] As the package 9 rotates in the forward direction, the yarn end 7c begins to be pulled out from the suction device 49 almost simultaneously with the complete unwinding of the spun yarn 7 from the yarn storage roller 41. As a result, the yarn end 7c of the spun yarn 7 on the package 9 side is pulled out from the suction device 49 and moves to the downstream side of the yarn storage device 17.

[0099] The significance of the control for rotating the yarn storage roller 41 in the reverse rotation direction and the forward rotation direction as shown at time t2 to t4 will be described below.

[0100] The spun yarn 7 is twisted and produced by the spinning device 13. Therefore, when the spun yarn 7 is broken, the portion near the yarn end 7t tends to deform in a constant direction due to the influence of the twisting torque.

[0101] At time t1, if Figure 3 As shown by reference numeral 7a, the yarn end 7t becomes free near the uppermost portion 80. Due to the influence of the torque, the free yarn end 7a is likely to contact the spun yarn 7 remaining wound in the storage portion 41a as shown by reference numeral 7b.

[0102] If the yarn end 7t in the state shown by reference numeral 7b becomes entangled with the spun yarn 7 wound on the yarn storage roller 41, it may cause tension fluctuation and / or yarn breakage. Alternatively, the spun yarn 7 on the yarn storage roller 41 may become entangled and clump together and fall off, causing slippage, which may cause the spun yarn 7 to be unwound from the yarn storage roller 41 to be erroneously wound.

[0103] As a method of preventing the yarn end 7a from becoming entangled with the spun yarn 7 wound on the storage roller 41, it is also conceivable to cause the yarn end 7a to dance using centrifugal force. Therefore, the storage roller 41 may be rotated in the forward direction at a certain speed while the spun yarn 7 is being pulled downstream from the storage roller 41 for unwinding. However, rotating the storage roller 41 while unwinding the spun yarn 7 from the storage roller 41 downstream may cause undesirable changes in the twist strength of the spun yarn 7 between the storage roller 41 and the winding device 21.

[0104] To address this issue, in this embodiment, the yarn storage roller 41 is first rotated in the counter-rotating direction, causing the suction device 49 to capture the free yarn end 7a. As a result, the yarn end 7a is released from the yarn storage roller 41, as indicated by reference numeral 7c. Subsequently, while the suction device 49 continues to attract the spun yarn 7, the yarn storage roller 41 is slightly rotated in the forward direction. This eliminates any slack in the spun yarn 7 between the suction device 49 and the yarn storage roller 41, allowing the spun yarn 7 to be guided from the suction port 71 through the yarn introduction portion 79 to the most upstream portion 80. Furthermore, the forward rotation of the yarn storage roller 41 exerts a tightening effect on the outer circumferential surface of the yarn storage roller 41.

[0105] As described above, the spun yarn 7 wound on the yarn storage roller 41 is regularly arranged in the storage portion 41a. Therefore, by rotating the package 9 in the forward direction while the yarn storage roller 41 is stopped, the spun yarn 7 can be unwound from the yarn storage roller 41 in a neat spiral and fed downstream. After (or almost simultaneously with) the last roll of spun yarn 7 is unwound from the yarn storage roller 41, the yarn end 7c is removed from the suction port 71 of the suction device 49. This reliably prevents the yarn end 7t from becoming entangled.

[0106] Next, explain Figure 1 The control related to the operation of the yarn tail removing lever 51 is shown.

[0107] In this embodiment, when the unwinding of the spun yarn 7 from the yarn storage roller 41 is completed, the yarn removing lever 51 performs a yarn removing operation. Hereinafter, this yarn removing operation may be referred to as a first yarn removing operation. The timing of the first yarn removing operation is later than the timing at which the yarn end 7t of the spun yarn 7 leaves the yarn storage roller 41. The timing of the first yarn removing operation may be referred to as a first timing.

[0108] The first yarn removal operation will be described in detail. When the unit controller 25 determines that the unwinding of the spun yarn 7 from the yarn storage roller 41 is complete, it controls the winding device 21 to stop the rotation of the package 9. At approximately the same time as the rotation of the package 9 stops, the unit controller 25 controls the yarn storage device 17 to move the yarn removal lever 51 from the standby position to the yarn removal position.

[0109] Shortly after the spun yarn 7 wound on the yarn storage roller 41 is completely unwound, the yarn end 7t of the spun yarn 7 on the package 9 side passes downstream near the flyer 45 while remaining free from the yarn storage roller 41. During this process, the free yarn end 7t or a portion thereof may come into contact with the flyer 45 and become entangled. In this embodiment, the yarn end 7t or a portion thereof may be removed from the flyer 45 at this time by performing the first yarn tail removal operation described above. The timing of moving the yarn tail removal lever 51 is not particularly limited and may be any time before the yarn is connected by the connecting device 19.

[0110] The first yarn removal operation is not necessarily required. For example, a sensor that detects when the spun yarn 7 is not entangled may be provided on the flyer 45, and the first yarn removal operation may be performed only when the sensor detects that the spun yarn 7 is entangled. Alternatively, the first yarn removal operation may be omitted. Furthermore, in this embodiment, the first yarn removal operation is performed assuming that the spun yarn 7 has been completely unwound from the yarn storage roller 41, and it is unclear whether the spun yarn 7 has actually been unwound from the yarn storage roller 41.

[0111] The stroke (first movement amount) of the yarn removing lever 51 when performing the first yarn removing operation is different from the stroke (second movement amount) of the yarn removing lever 51 when performing the second yarn removing operation described later. In other words, the yarn removing position relative to the flyer 45 is different in these two cases.

[0112] Another example involves, for example, the case where the yarn 7 from the yarn feeding device 23 is guided to the yarn splicing device 19 by the guide device 57 during a series of splicing operations after the yarn 7 is disconnected. At this point, the yarn 7 guided by the guide device 57 is hooked onto the rotating flyer 45 and begins to be wound onto the yarn storage roller 41. After a predetermined amount (length) of yarn 7 is wound onto the yarn storage roller 41, the unit controller 25 moves the yarn tail removal lever 51 from the standby position to the yarn tail removal position. This yarn tail removal operation is hereinafter referred to as the second yarn tail removal operation. This allows the yarn 7 to be removed from the flyer 45, and the yarn 7 wound onto the yarn storage roller 41 at the start of spinning is removed by suction by the guide device 57. Subsequently, the yarn tail removal lever 51 returns to the standby position again, hooking the yarn 7 onto the flyer 45 and winding onto the yarn storage roller 41. This yarn 7 is then spliced ​​together with the yarn 7 on the package 9 side, which has been prepared by the catching device 83, by the yarn splicing device 19. Hereinafter, the time when the second yarn removing operation is performed may be referred to as the second time. The second time is different from the first time described above.

[0113] When the flyer 45 contacts the vicinity of the free yarn end 7t, the flyer 45 and the spun yarn 7 are more likely to become entangled than when it contacts the midway portion of the spun yarn 7. Therefore, in this embodiment, the first movement amount is set to be larger than the second movement amount. In other words, the yarn removal position during the first yarn removal operation is located farther from the flyer 45 than the yarn removal position during the second yarn removal operation. Thus, even if the yarn end 7t becomes entangled with the flyer 45, the yarn removal lever 51 can reliably remove the yarn end 7t from the flyer 45.

[0114] Next, when the spun yarn 7 is disconnected between the yarn feeding device 23 and the yarn storage device 17, processing of the yarn end of the spun yarn 7 on the package 9 side after the spun yarn 7 is unwound from the yarn storage roller 41 will be described.

[0115] like Figure 5 As shown, the spinning unit 1 is equipped with 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 is capable of detecting the yarn end 7t located between the yarn storage device 17 and the winding device 21 after being unwound from the yarn storage roller 41. In this embodiment, the detection device 81 is a sensor located downstream of the yarn storage roller 41 in the yarn traveling direction. The detection device 81 is located closer to the yarn storage device 17 than to the winding device 21 in the yarn traveling direction.

[0116] 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 may be an electrostatic capacitance proximity sensor or a transmission sensor.

[0117] The detection device 81 is arranged downstream of the guide 55. Specifically, the detection device 81 is arranged between the guide 55 and the yarn splicing device 19 in the yarn running direction. The detection device 81 is arranged near the guide 55. The guide 55 guides the path of the spun yarn 7 near the detection device 81.

[0118] In a state where the spun yarn 7 is wound around the yarn storage roller 41, when the spun yarn 7 is pulled between the guide 55 and the winding device 21, the spun yarn 7 moves along the winding roller 41. Figure 5 The detection device 81 is arranged to face an appropriate position of the path 111 of the spun yarn 7 and detects whether the spun yarn 7 is located at this position.

[0119] Therefore, when the spun yarn 7 is in a continuous state between the yarn feeding device 23 and the winding device 21, the detection device 81 detects the presence of the spun yarn 7 because the spun yarn 7 is positioned along the path 111. When the yarn end 7t of the spun yarn 7 on the package 9 side is located downstream of the detection device 81 after the spun yarn 7 is broken, the detection device 81 does not detect the spun yarn 7.

[0120] Even if the yarn end 7t of the spun yarn 7 on the package 9 side is located upstream of the detection device 81, the detection device 81 does not detect the spun yarn 7 unless the spun yarn 7 is wound around the yarn storage roller 41. This is because the spun yarn 7, unable to maintain tension, deviates from the yarn path 111 and is sucked into the catching device 83, described later. Thus, the detection device 81 detecting whether the spun yarn 7 is located on the yarn path 111 is essentially the same as detecting whether the yarn end 7t is located between the yarn storage roller 41 and the winding device 21.

[0121] Furthermore, the detection device 81 can be positioned at a position where the movement of the spun yarn 7 is stable. For example, the detection device 81 can be positioned anywhere in the region downstream of the axial center of the storage roller 41, which is opposed to the storage roller 41, or can be positioned near the suction device 49 (a position adjacent to the storage roller 41 in a direction intersecting the axial direction of the storage roller 41). Furthermore, the yarn end 7t of the spun yarn 7 on the package 9 side detected by the detection device 81 does not refer only to the portion of the spun yarn 7 where the yarn 7 has completely terminated, but also includes the portion and the surrounding area.

[0122] The spinning unit 1 is provided with a catching device 83 for catching the spun yarn 7 on the downstream side of the yarn storage device 17 (yarn storage roller 41). The catching device 83 is arranged between the yarn storage device 17 and the winding device 21 in the yarn traveling direction. Figure 1As shown, the catching device 83 is arranged near the detecting device 81 between the yarn storage device 17 and the winding device 19 in the yarn running direction. The catching device 83 is arranged near the yarn storage device 17 relative to the winding device 21 in the yarn running direction.

[0123] When the spun yarn 7 breaks upstream of the yarn storage device 17 in the yarn traveling direction, the catching device 83 sucks and catches the yarn end 7t of the spun yarn 7 on the package 9 side. When sucking and catching the yarn end 7t, the catching device 83 may not initially suck the completely ended portion of the spun yarn 7.

[0124] The capturing device 83 includes a tube 85. In the present embodiment, the capturing device 83 further includes an air suction device 87 that generates a suction airflow by supplying compressed air.

[0125] The tube 85 has a cylindrical shape. The tube 85 is connected to the suction source 75 as a negative pressure source. Therefore, the capture device 83 can generate a suction airflow inside the tube 85. An air suction device 87 is provided at one end portion in the longitudinal direction of the tube 85. The air suction device 87 has a capture opening 89 for sucking the yarn end 7t of the spun yarn 7 on the package 9 side. The capture opening 89 is configured to face the yarn channel ( Figure 5 The catching opening 89 is an opening in the path 111 of the spun yarn 7. In addition, the relative position of the catching opening 89 with respect to the yarn channel is not particularly limited, as long as it is located near the yarn channel on the downstream side of the yarn storage roller 41. In the present embodiment, the catching opening 89 is fixedly provided in the textile unit 1. Specifically, the spinning machine includes a frame (not shown) for mounting the textile unit 1, etc. The tube 85 is fixed to the frame. Instead of being directly fixed to the frame, the tube 85 can be indirectly fixed to the frame via other components. Thus, a fixed structure of the catching opening 89 can be achieved.

[0126] Compressed air generated by the compressed air source 91 is supplied to the air intake device 87. Compressed air is released from the ejection hole (not shown) by the air intake device 87, so that not only the suction airflow generated by the suction source 75 but also an additional suction airflow can be generated at the capture opening 89. A second valve 93 is provided in the middle of the compressed air supply path connecting the air intake device 87 and the compressed air source 91. The second valve 93 is an electromagnetic valve for switching whether compressed air is supplied to the air intake device 87. The opening and closing of the second valve 93 is controlled by the unit controller 25. By controlling to open the second valve 93, a suction airflow is generated in the air intake device 87 (capture device 83), and by controlling to close the second valve 93, the suction airflow in the air intake device 87 is stopped.

[0127] Thus, in this embodiment, the catching device 83 is configured to include the air suction device 87. Thus, the flow of air generated by the jetted air in the catching device 83 generates a strong suction airflow at the catching opening 89, thereby sucking in and reliably holding the yarn end 7t of the spun yarn 7 on the package 9 side. The catching device 83 is not necessarily required to include the air suction device 87, and may not necessarily include the air suction device 87, as long as it can capture the yarn end 7t of the spun yarn 7 on the package 9 side with a sufficiently strong suction force.

[0128] The timing for activating the air suction device 87 so that the catching device 83 can catch the yarn end 7t of the spun yarn 7 on the package 9 side is not particularly limited. For example, the unit controller 25 may activate the air suction device 87 when it is determined that the amount of the spun yarn 7 remaining in the yarn storage roller 41 is less than a predetermined amount. The amount of the spun yarn 7 remaining in the yarn storage roller 41 can be determined based on the detection result of the yarn detection sensor 47.

[0129] In this embodiment, when the spun 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, the rotation of the package 9 in the forward direction is controlled as follows. As described above, the spun yarn 7 (the spun yarn 7 on the package 9 side) is unwound from the yarn storage roller 41 toward the downstream side. Shortly after the yarn end 7t of the spun yarn 7 is separated from the yarn storage roller 41 by unwinding the spun yarn 7 from the yarn storage roller 41, the yarn end 7t of the spun yarn 7 is captured by the capture device 83. As a result, when the detection device 81 no longer detects the spun yarn 7, the unit controller 25 stops the forward rotation of the package 9. This control allows the forward rotation of the package 9 to be stopped before the yarn end 7t is completely wound onto the package 9.

[0130] The package 9 then temporarily rotates in the reverse direction. This causes a portion of the spun yarn 7 to be unwound from the package 9 and drawn into the catching device 83. The spun yarn 7 drawn into the catching device 83 is discarded during the process of being connected by the connecting device 19. The degree to which the package 9 is rotated in the reverse direction is adjusted according to the length of the yarn defect in the spun yarn 7 detected by the yarn monitoring device 15. Therefore, if the yarn defect in the spun yarn 7 on the package 9 side is shorter, reducing the amount of package 9 rotation in the reverse direction shortens the length of the spun yarn 7 that is removed by the catching device 83, thereby reducing the amount of discarded spun yarn 7.

[0131] When the package 9 is temporarily rotated in the reverse direction, if the suction force of the catching device 83 is insufficient, the spun yarn 7 on the package 9 side may not be unwound and may not be separated from the surface of the package 9, causing it to stick. If the package 9 is rotated in the reverse direction in this state, the spun yarn 7 may be reversed, causing it to be wound in the direction opposite to the normal direction. This reverse winding may cause the yarn 7 to fail in the threading process of the threading device 19 and degrade the quality of the package 9. However, in this embodiment, by activating the air suction device 87 in the catching device 83, the spun yarn 7 can be strongly sucked and pulled through the catching opening 89. As a result, the occurrence of reverse winding can be prevented.

[0132] In this embodiment, a first jet device 97 is provided on the downstream side of the yarn storage roller 41. The first jet device 97 is arranged at a position opposite to the catching device 83 (catching opening 89) in a manner that separates the path 111 of the spun yarn 7. In other words, the first jet device 97 and the catching device 83 (catching opening 89) are provided on a straight line. Therefore, the first jet device 97 can spray air toward the catching device 83 (catching opening 89). The air sprayed from the first jet device 97 is directed toward the catching opening 89 of the catching device 83. Figure 5 The air flows in the direction of arrow 99. As a result, the portion near the yarn end 7t of the spun yarn 7 on the package 9 side is blown toward the catching opening 89, allowing the catching device 83 to more reliably catch the yarn end 7t. The timing of the first jetting device 97 jetting is not particularly limited. This timing may be, for example, when the yarn detecting sensor 47 no longer detects the spun yarn 7, that is, when the spun yarn 7 is about to disappear from the yarn storage roller 41, or when the catching device 83 activates the air suction device 87.

[0133] Compressed air generated by a 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 yarn path (the catching opening 89 of the catching device 83). A third valve 103 is provided midway in the compressed air supply path connecting the first injection device 97 and the compressed air source 101. The third valve 103 is a solenoid valve for switching 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 to open the third valve 103, compressed air is injected into the first injection device 97, and by controlling to close the third valve 103, the injection of compressed air is stopped. Alternatively, the compressed air source 101 and the compressed air source 91 are not provided separately, and the spinning unit 1 can be configured to supply compressed air from a single compressed air source.

[0134] In this embodiment, if Figure 1As shown, a second injection device 105 is provided downstream of the first injection device 97. The second injection device 105 is fixedly mounted on the spinning unit 1 or a work cart (not shown). If the spun yarn 7 breaks between the yarn storage device 17 and the winding device 21 in the yarn traveling direction, the second injection device 105 injects compressed air to guide the yarn end 7t of the spun yarn 7 on the package 9 side toward the catching device 83. The second injection device 105 can be configured similarly to the first injection device 97. Therefore, if the spun yarn 7 breaks downstream of the yarn storage device 17 in the yarn traveling direction due to reasons such as a connection failure in the connection device 19, the package 9 is rotated in the reverse direction and compressed air is injected from the second injection device 105, allowing the catching device 83 to catch the yarn end 7t of the spun yarn 7 on the package 9 side. As a result, the yarn end 7t of the spun yarn 7 is guided to a position where it can be connected by the connection device 19. Therefore, the spun yarn 7 on the package 9 side can be processed with a simple structure. The package 9 is rotated in the reverse direction by the winding device 21 simultaneously or substantially simultaneously with the start of the injection of compressed air from the second injection device 105. The second injection device 105 may be omitted.

[0135] As described above, the spinning machine of this embodiment includes a spinning unit 1 that includes a yarn feeding device 23, a winding device 21, a yarn storage device 17, a detection device 81, a catching device 83, and a first injection device 97. The yarn feeding device 23 can supply spun yarn 7. The winding device 21 winds the spun yarn 7 supplied from the yarn feeding device 23 into a package 9. The yarn storage device 17 is arranged midway in the yarn passage (yarn travel path) formed between the yarn feeding device 23 and the winding device 21. The yarn storage device 17 includes a yarn storage roller 41 that winds and stores the spun yarn 7 supplied from the yarn feeding device 23. The detection device 81 detects the yarn end 7t of the spun yarn 7 on the package 9 side when the spun yarn 7 breaks upstream of the yarn storage device 17 in the yarn travel direction. The catching device 83 catches the yarn end of the yarn on the package 9 side downstream of the yarn storage device 17 (yarn storage roller 41). The first injection device 97 injects air toward the catching device 83. The winding of the spun yarn 7 into the package 9 is stopped based on the detection result of the detection device 81 so that the yarn end 7t of the spun yarn 7 on the package 9 can be stopped at a position where it can be caught by the catching device 83.

[0136] Thus, the yarn end 7t of the spun yarn 7 on the package 9 side is detected by the detection device 81, making it easier for the package 9 to stop rotating at a position where the yarn end 7t of the spun yarn 7 on the package 9 side can be captured by the catching device 83. Therefore, if the spun yarn 7 breaks upstream of the yarn storage device 17 in the yarn traveling direction, the spun yarn 7 on the package 9 side can be handled with a simple structure. The air injected from the first injection device 97 guides the yarn end 7t of the spun yarn 7 on the package 9 side toward the catching device 83. Therefore, the yarn end 7t can be reliably captured by the catching device 83.

[0137] In the spinning machine of the present embodiment, the detection device 81 is a sensor arranged on the downstream side of the yarn storage roller 41 in the yarn travelling direction.

[0138] Thus, it is possible to detect that the yarn end 7t of the spun yarn 7 on the package 9 side has reached the downstream side of the yarn storage roller 41.

[0139] In the spinning machine of the present embodiment, the sensor serving as the detection device 81 is a reflection type sensor.

[0140] Thus, the yarn end 7t of the spun yarn 7 on the package 9 side can be easily detected.

[0141] In the spinning machine of the present embodiment, the catching device 83 is configured to include an air suction device 87 that generates a suction flow by supplying compressed air.

[0142] Thus, the air flow generated by the air jet can strongly attract the spun yarn 7 in the catching device 83. Therefore, when the package 9 is rotated in the reverse direction to unwind the spun yarn 7 from the package 9, the spun yarn 7 on the package 9 side can be prevented from being wound back in the direction opposite to the original direction relative to the package 9.

[0143] In the spinning machine of the present embodiment, the first injection device 97 is arranged on the opposite side to the catching device 83 across the path 111 of the spun yarn 7 which is a part of the yarn travelling path.

[0144] Thus, the catching device 83 can reliably catch the yarn end 7t.

[0145] In the spinning machine of this embodiment, the catching device 83 includes a cylindrical tube 85 having a catching opening 89 formed at the front end. The catching opening 89 is fixedly provided. The tube 85 is connected to a suction source.

[0146] This makes it possible to achieve a simple structure of the capturing device 83 .

[0147] The spinning machine of this embodiment includes a guide 55. The guide 55 is arranged downstream of the yarn storage roller 41 and guides the spun yarn 7 wound into the package 9. The detection device 81 is arranged downstream of the guide 55 and detects the spun yarn 7 wound into the package 9.

[0148] Thus, since the guide 55 stabilizes the yarn travelling path, the detection device 81 can reliably detect the spun yarn 7 on the downstream side of the yarn storage roller 41.

[0149] The spinning machine of this embodiment includes a connecting device 19. When the spun yarn 7 upstream of the yarn storage device 17 in the yarn traveling direction is disconnected, the connecting device 19 connects the spun yarn 7 on the yarn feeding device 23 side and the spun yarn 7 on the package 9 side.

[0150] Thus, even if the spun yarn 7 is broken upstream of the yarn storage device 17 in the yarn travelling direction, the yarn connection process can be performed and the winding of the package 9 can be resumed.

[0151] In the spinning machine of this embodiment, the catching device 83 is arranged between the yarn storage device 17 and the yarn connecting device 19 in the yarn travelling direction. The catching device 83 is arranged closer to the yarn storage device 17 than the winding device 21 in the yarn travelling direction.

[0152] Therefore, if the spun yarn 7 on the upstream side of the yarn storage device 17 in the yarn traveling direction is broken, the spun yarn 7 on the package 9 side can be easily caught by the catching device 83 located near the yarn storage device 17. In addition, since the spun yarn 7 on the package 9 side is caught by the catching device 83 between the yarn storage device 17 and the splicing device 19, the caught spun yarn 7 on the package 9 side can be smoothly spliced ​​by the splicing device 19.

[0153] The spinning machine of this embodiment includes a second injection device 105. When the spun yarn 7 breaks downstream of the yarn storage device 17 in the yarn traveling direction, the second injection device 105 injects air so as to guide the yarn end 7t of the spun yarn 7 on the package 9 side toward the catching device 83. The second injection device 105 is arranged near the winding device 21 and upstream of the winding device 21. The injection hole of the second injection device 105 is provided so as to correspond to the catching position of the catching device 83.

[0154] Thus, even if the yarn end 7t of the spun yarn 7 on the package 9 side is located downstream of the catching device 83 , the spun yarn 7 on the package 9 side can be pulled out from the package 9 and caught by the catching device 83 .

[0155] The spinning machine of this embodiment includes a yarn monitoring device 15 capable of detecting yarn defects in the spun yarn 7 supplied from the yarn feeding device 23. When the yarn monitoring device 15 detects a yarn defect, the spun yarn 7 is cut upstream of the yarn storage device 17 in the yarn traveling direction. After the spun yarn 7 on the package 9 side is caught by the catching device 83, the winding device 21 rotates the package 9 in a direction opposite to the winding direction of the package 9 so that the catching device 83 removes the spun yarn 7 by a length required to remove the yarn defect from the caught spun yarn 7.

[0156] Thus, the yarn defect detected by the yarn monitoring device 15 can be reliably removed by the catching device 83.

[0157] While the preferred embodiment of the present invention has been described above, the above configuration can be modified, for example, as follows. The above embodiment and the following modifications can be combined as appropriate.

[0158] Alternatively, a jetting device (yarn acting portion) for jetting air around the yarn storage roller 41 may be provided in place of the suction device 49. For example, the jetting device may be configured to jet air in the tangential direction of the yarn storage roller 41 in the uppermost portion 80. The jetting direction of the air may be different from the direction of the yarn storage roller 41. Figure 3 The directions of the suction airflows in the suction port 71 shown are consistent, but they can also be different. The portion of the spun yarn 7 on the package 9 side, upstream of the yarn storage roller 41, is blown along the jet flow. This prevents the free yarn end 7a from coming into contact with the spun yarn 7 wound in the storage portion 41a. While the jet device is gentler than the suction device 49, it can still effectively guide the spun yarn 7. The jet of air from the jet device also creates resistance, hindering the yarn 7 from traveling in the direction of being wound onto the yarn storage roller 41.

[0159] Alternatively, a suitable clamping device (yarn action portion) configured to clamp the yarn end 7t of the spun yarn 7 on the package 9 side may be provided in place of the suction device 49. The spun yarn 7 may be clamped between a pair of arms or a pair of rollers. The clamping device can restrain the spun yarn 7 by clamping it, preventing it from moving. For example, by providing a damper on the roller shaft, resistance can be applied to prevent the spun yarn 7 from moving in the direction of being wound onto the yarn storage roller 41.

[0160] When a roller pair is provided instead of the suction device 49, the roller pair can also perform the pulling operation of pulling out the spun yarn 7 from the spinning device 13. At this time, the yarn storage roller 41 stores the spun yarn 7 pulled out by the roller pair.

[0161] A brush or comb teeth (yarn action portion) for hooking the spun yarn 7 may be provided instead of the suction device 49. By hooking the spun yarn 7 on the brush or the like, the spun yarn 7 can be restrained and prevented from moving.

[0162] When the spinning unit 1 includes a jet device, a roller pair, a brush, or comb teeth as described above as a yarn acting portion, the rotation of the yarn storage roller 41 in the reverse direction for causing the suction port 71 of the suction device 49 to suck the spun yarn 7 may be omitted. In this case, after the spun yarn 7 is cut, the rotation of the yarn storage roller 41 and / or the rotation of the package 7 may not be temporarily stopped in conjunction with the operation of the yarn acting component.

[0163] The detection device 81 may also be a sensor that is provided at an end portion of the yarn storage roller 41 that is downstream of the axial center portion in the yarn travel direction relative to the outer peripheral surface of the yarn storage roller 41 and is configured to be opposite to the end portion. The sensor is configured at a position that is opposite to the roller surface of the yarn storage roller 41 that is downstream of the axial center portion in the yarn travel direction. In a case where the spinning unit 1 is provided with a restriction unit that restricts the yarn path of the spun yarn 7 that travels from the yarn storage roller 41 via the flyer 45, the yarn path may be restricted by the restriction unit earlier than the time when the sensor is assumed to detect the yarn end 7t. The restriction unit may also be, for example, a component that is provided near the flyer 45 and that is capable of stopping the rotation of the flyer 45 of the yarn storage device 17. By restricting the yarn path by the restriction unit, the yarn end 7t can be stably detected by the sensor.

[0164] The detection device 81 can also be a sensor which is arranged in an area of ​​the yarn storage roller 41 that is upstream of the axial center part in the yarn travel direction (for example, the end part on the upstream side of the yarn travel direction in the storage part 41a) relative to the outer peripheral surface of the yarn storage roller 41 and is configured to be opposite to the outer peripheral surface of the yarn storage roller 41.

[0165] The yarn detecting sensor 47 for detecting the amount of yarn stored in the yarn storage roller 41 may also serve as the detecting device 81. As described above, the yarn detecting sensor 47 detects whether the amount of yarn stored in the yarn storage roller 41 is greater than a predetermined amount. Figure 3 As shown, consider the case where the spun yarn 7 is broken on the upstream side of the yarn storage device 17 in the yarn running direction. On the upstream side of the yarn storage roller 41 in the yarn running direction, for example, when the length of the spun yarn 7 sucked into the suction device 49 is small, the yarn detection sensor 47 detects the amount of stored yarn and the end of the spun yarn 7 (such as Figure 3 The area of ​​the spun yarn 7 near the top (shown by reference numeral 7c) is substantially the same.

[0166] The detection device 81 may also be a line sensor. The line sensor is positioned adjacent to the yarn storage roller 41 along the axial direction of the yarn storage roller 41. The line sensor faces the outer peripheral surface of the storage portion 41a. The line sensor includes a plurality of detection elements arranged in a direction parallel to the axial direction of the yarn storage roller 41. The line sensor is configured to detect a position encompassed by an area of ​​the yarn storage roller 41 that is downstream of the axial center in the direction of yarn travel. If all detection elements do not detect the spun yarn 7, it can be determined that the yarn end 7t has passed through the outer peripheral surface of the yarn storage roller 41.

[0167] The line sensor serving as the detection device 81 may also be configured to detect a position within the storage portion 41a of the yarn storage roller 41, encompassing an area upstream of the axial center in the yarn traveling direction. In this configuration, the line sensor can detect the amount of yarn stored in the yarn storage roller 41. As in the configuration described above where the yarn detecting sensor 47 also serves as the detection device 81, the line sensor detects the amount of yarn stored and essentially detects the area of ​​the spun yarn 7 near the end of the spun yarn 7.

[0168] The detection device 81 may be a sensor provided near the suction port 71 of the suction device 49. When the spun 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 the sensor near the suction port 71, the yarn end 7t (7c) can be stably detected.

[0169] When the detection device 81 is provided, for example, to face the outer peripheral surface of the yarn storage roller 41, the detection device 81 may be omitted. Figure 5 The sensor at the position of reference numeral 81 can be used as a yarn detection sensor for detecting the spun yarn 7 for other appropriate purposes unless otherwise omitted.

[0170] In the above embodiment, when the yarn monitoring device 15 detects a yarn defect, spinning in the spinning device 13 is stopped and the spun yarn 7 is cut. Alternatively, the spun yarn 7 may be cut by a cutter provided upstream of the yarn storage device 17.

[0171] When there are multiple spinning units 1, instead of providing a wiring device 19 in each spinning unit 1, a wiring carriage can be provided that can move relative to the multiple spinning units 1 and stop at a working position relative to the spinning unit 1 as needed to perform wiring.

[0172] In the above embodiment, the spinning unit 1 has a configuration in which the yarn passage formed between the yarn feeding device 23 and the winding device 21 is arranged to extend from bottom to top. However, the present invention can also be applied to a spinning unit 1 having a configuration in which the yarn passage extends from top to bottom.

[0173] In the above-described embodiment, the spinning machine is an air spinning machine (jet spinning machine), but it may also be an open-end spinning machine.

[0174] In the above embodiment, the spun yarn 7 on the package 9 side can be spliced ​​with the spun yarn 7 supplied from the yarn feeding device 23 via the splicing device 19. However, the disconnected spun yarn 7 can be connected again by a known splicing method.

[0175] In view of the above teachings, it will be apparent that the present invention may take many modified and altered forms. Therefore, it should be understood that within the scope of the appended claims, the present invention may be practiced otherwise than as described herein.

Claims

1. A spinning machine, characterized in that: have: a yarn feeding device capable of supplying yarn; a winding device for winding the yarn supplied from the yarn feeding device into a package; a yarn storage device disposed midway along a yarn travel path formed between the yarn feeding device and the winding device, and including a yarn storage roller for winding and storing the yarn supplied from the yarn feeding device; a detection device for detecting a yarn end of the yarn on the package side when the yarn is broken on the upstream side of the yarn storage device in the yarn traveling direction; a catching device for catching a yarn end of the yarn on the package side at a downstream side of the yarn storage device; as well as a first spraying device that sprays air toward the capturing device; The winding of the yarn on the package side is stopped based on the detection result of the detection device so that the yarn end of the yarn on the package side stops at a position where it can be caught by the catching device. The spinning machine includes a connecting device for connecting the yarn on the yarn feeding device side and the yarn on the package side caught by the catching device when the yarn is disconnected on the upstream side of the yarn storage device in the yarn traveling direction.

2. The spinning machine according to claim 1, characterized in that The detection device is a sensor configured to detect the outer peripheral surface of the yarn storage roller.

3. The spinning machine according to claim 2, characterized in that: The sensor is a reflective sensor.

4. The spinning machine according to claim 2, characterized in that: The detection device is a sensor configured to detect a downstream area of ​​the yarn storage roller in the yarn traveling direction. The spinning machine further includes a restriction unit configured to restrict a yarn path of the yarn unwound from the yarn storage roller included in the yarn travelling path before the sensor detects the yarn end of the package-side yarn.

5. The spinning machine according to claim 3, characterized in that: The detection device is a sensor configured to detect a downstream area of ​​the yarn storage roller in the yarn traveling direction. The spinning machine further includes a restriction unit configured to restrict a yarn path of the yarn unwound from the yarn storage roller included in the yarn travelling path before the sensor detects the yarn end of the package-side yarn.

6. The spinning machine according to claim 2, characterized in that: The detection device is a line sensor.

7. The spinning machine according to any one of claims 1 to 6, characterized in that: The capturing device is configured to include an air suction device that generates a suction flow by supplying compressed air.

8. The spinning machine according to any one of claims 1 to 6, characterized in that The first jetting device is arranged on the opposite side to the catching device across a portion of the yarn travelling path.

9. The spinning machine according to claim 7, characterized in that: The first jetting device is arranged on the opposite side to the catching device across a portion of the yarn travelling path.

10. The spinning machine according to any one of claims 1 to 6 and 9, characterized in that: The capturing device includes a cylindrical tube having a capturing opening formed at the front end. The capture opening is fixedly arranged. The tube is connected to a suction source.

11. The spinning machine according to claim 7, characterized in that: The capturing device includes a cylindrical tube having a capturing opening formed at the front end. The capture opening is fixedly arranged. The tube is connected to a suction source.

12. The spinning machine according to claim 8, characterized in that The capturing device includes a cylindrical tube having a capturing opening formed at the front end. The capture opening is fixedly arranged. The tube is connected to a suction source.

13. The spinning machine according to any one of claims 1 to 6, 9, 11, and 12, wherein: have: a guide member disposed downstream of the yarn storage roller and configured to guide the yarn wound into the package; and The yarn detecting sensor is arranged downstream of the guide member and detects the yarn wound into the package.

14. The spinning machine according to claim 7, wherein: have: a guide member disposed downstream of the yarn storage roller and configured to guide the yarn wound into the package; and The yarn detecting sensor is arranged downstream of the guide member and detects the yarn wound into the package.

15. The spinning machine according to claim 8, wherein: have: a guide member disposed downstream of the yarn storage roller and configured to guide the yarn wound into the package; and The yarn detecting sensor is arranged downstream of the guide member and detects the yarn wound into the package.

16. The spinning machine according to claim 10, wherein: have: a guide member disposed downstream of the yarn storage roller and configured to guide the yarn wound into the package; and The yarn detecting sensor is arranged downstream of the guide member and detects the yarn wound into the package.

17. The spinning machine according to claim 1, characterized in that The catching device is arranged between the yarn storage device and the yarn connecting device in the yarn travelling direction, and is arranged closer to the yarn storage device than the winding device in the yarn travelling direction.

18. The spinning machine according to any one of claims 1 to 6, 9, 11, 12, and 14 to 17, characterized in that: The spinning machine includes a second injection device configured to inject air to guide a yarn end of the yarn on the package side toward the catching device when the yarn breaks downstream of the yarn storage device in the yarn travelling direction.

19. The spinning machine according to claim 7, characterized in that: The spinning machine includes a second injection device configured to inject air to guide a yarn end of the yarn on the package side toward the catching device when the yarn breaks downstream of the yarn storage device in the yarn travelling direction.

20. The spinning machine according to claim 8, characterized in that The spinning machine includes a second injection device configured to inject air to guide a yarn end of the yarn on the package side toward the catching device when the yarn breaks downstream of the yarn storage device in the yarn travelling direction.

21. The spinning machine according to claim 10, characterized in that The spinning machine includes a second injection device configured to inject air to guide a yarn end of the yarn on the package side toward the catching device when the yarn breaks downstream of the yarn storage device in the yarn travelling direction.

22. The spinning machine according to claim 13, characterized in that The spinning machine includes a second injection device configured to inject air to guide a yarn end of the yarn on the package side toward the catching device when the yarn breaks downstream of the yarn storage device in the yarn travelling direction.

23. The spinning machine according to any one of claims 1 to 6, 9, 11, 12, 14 to 17, and 19 to 22, characterized in that: The spinning machine includes a yarn monitoring device capable of detecting yarn defects included in the yarn supplied from the yarn feeding device. If the yarn monitoring device detects a yarn defect, the yarn is cut at an upstream side of the yarn storage device in the direction of yarn travel. After the yarn on the package side is caught by the catching device, the winding device rotates the package in a direction opposite to the winding direction of the package so that the catching device removes the yarn of a length required for removing the yarn defect from the caught yarn.

24. The spinning machine according to claim 7, characterized in that The spinning machine includes a yarn monitoring device capable of detecting yarn defects included in the yarn supplied from the yarn feeding device. If the yarn monitoring device detects a yarn defect, the yarn is cut at an upstream side of the yarn storage device in the direction of yarn travel. After the yarn on the package side is caught by the catching device, the winding device rotates the package in a direction opposite to the winding direction of the package so that the catching device removes the yarn of a length required for removing the yarn defect from the caught yarn.

25. The spinning machine according to claim 8, characterized in that The spinning machine includes a yarn monitoring device capable of detecting yarn defects included in the yarn supplied from the yarn feeding device. If the yarn monitoring device detects a yarn defect, the yarn is cut at an upstream side of the yarn storage device in the direction of yarn travel. After the yarn on the package side is caught by the catching device, the winding device rotates the package in a direction opposite to the winding direction of the package so that the catching device removes the yarn of a length required for removing the yarn defect from the caught yarn.

26. The spinning machine according to claim 10, characterized in that The spinning machine includes a yarn monitoring device capable of detecting yarn defects included in the yarn supplied from the yarn feeding device. If the yarn monitoring device detects a yarn defect, the yarn is cut at an upstream side of the yarn storage device in the direction of yarn travel. After the yarn on the package side is caught by the catching device, the winding device rotates the package in a direction opposite to the winding direction of the package so that the catching device removes the yarn of a length required for removing the yarn defect from the caught yarn.

27. The spinning machine according to claim 13, characterized in that The spinning machine includes a yarn monitoring device capable of detecting yarn defects included in the yarn supplied from the yarn feeding device. If the yarn monitoring device detects a yarn defect, the yarn is cut at an upstream side of the yarn storage device in the direction of yarn travel. After the yarn on the package side is caught by the catching device, the winding device rotates the package in a direction opposite to the winding direction of the package so that the catching device removes the yarn of a length required for removing the yarn defect from the caught yarn.

28. The spinning machine according to claim 18, characterized in that The spinning machine includes a yarn monitoring device capable of detecting yarn defects included in the yarn supplied from the yarn feeding device. If the yarn monitoring device detects a yarn defect, the yarn is cut at an upstream side of the yarn storage device in the direction of yarn travel. After the yarn on the package side is caught by the catching device, the winding device rotates the package in a direction opposite to the winding direction of the package so that the catching device removes the yarn of a length required for removing the yarn defect from the caught yarn.

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