spinning machine

Abstract

A yarn storage device (23) is provided in a yarn path formed between a spinning device (22) and a take-up device (25). In a take-up interruption operation, a yarn (5) is applied with tension by a thread hanging member (53) while the yarn (5) remains on a yarn storage roller (51), and the yarn (5) is traversed by a traversing device (73) at a traverse width (W2) that is shorter than before the start of the take-up interruption operation.

Description

TECHNICAL FIELD

[0001] The present application relates to a spinning machine. BACKGROUND

[0002] Conventionally, there has been known a spinning machine that interrupts spinning and take-up of a yarn in a case where a yarn defect is detected in the spun yarn. Japanese Patent Application Publication No. 2016-016957 discloses such a spinning machine.

[0003] The spinning machine of Japanese Patent Application Publication No. 2016-016957 has a yarn supply portion, a yarn storage device, and a take-up portion. The spinning machine stops rotation of a package when take-up of a yarn is interrupted, after the yarn is broken and before the yarn end is taken up to the package.

[0004] In Japanese Patent Application Publication No. 2016-016957, it is intended to address reduction in productivity caused by failure of a capture guide device that captures a yarn end of a package to capture the yarn end through other means. Thus, Japanese Patent Application Publication No. 2016-016957 does not constitute a configuration that makes it easy for the capture guide device to capture the yarn end. SUMMARY

[0005] An object of the present application is to easily capture a yarn end of a yarn on a package side in a case where a break of the yarn occurs.

[0006] According to the present application, there is provided a spinning machine having the following configuration. That is, the spinning machine has a plurality of spinning units. Each of the spinning units has a spinning device, a take-up device, and a yarn storage device. The spinning device generates a yarn by spinning a fiber bundle and supplies the yarn. The take-up device takes up the yarn supplied from the spinning device while traversing the yarn to form a package. The yarn storage device is disposed in a yarn travel path formed between the spinning device and the take-up device. The yarn storage device has a yarn storage roller and a yarn hanging member. The yarn storage roller winds the yarn on an outer periphery to store the yarn. The yarn hanging member is configured to be rotatable and applies tension to the yarn unwound from the yarn storage roller by hooking the yarn. The take-up device of each of the spinning units has a package rotation device and a traversing device. The package rotation device independently drives the package to rotate for each of the spinning units. The traversing device independently drives the yarn wound on the package to traverse for each of the spinning units. In a take-up interruption operation of the take-up device, when take-up stop control of the take-up of the package is performed by stopping the spinning of the spinning device, the yarn is connected between the yarn storage roller and the package, and tension is applied to the yarn by the yarn hanging member, and the yarn is traversed by the traversing device at a traverse width that is shorter than before the start of the take-up interruption operation.

[0007] Thus, the position of the yarn end of the yarn on the package side can be restricted to a region corresponding to the shortened let-off width, in a state where the rotation of the package is stopped. Thus, the capturing of the yarn end can be easily performed after the rotation of the package is stopped. Further, after the spinning is stopped, the yarn is subjected to the let-off with the shortened let-off width, and thus the quality of the portion of the package that is wound during this period can be maintained to the same degree as before the spinning is stopped. Thus, the quality of the package can also be improved. Further, by winding the yarn on the yarn accumulation roller, a time difference based on the amount of accumulation of the yarn occurs from when the spinning is stopped until the yarn end on the package side is wound on the package, and thus the time for shortening the let-off width can be ensured.

[0008] In one embodiment, it is preferable that the shortened let-off width be 1 / 2 or less of the maximum let-off width set in the winding operation at the time of spinning. Further, it is preferable that the shortened let-off width be 10 mm or less.

[0009] Thus, the capturing of the yarn end becomes easy.

[0010] In one embodiment, it is preferable that the let-off device start the shortening of the let-off width at the same time as or immediately after the spinning of the spinning device is stopped, in the winding interruption operation.

[0011] Thus, the shortening of the let-off width can be performed on the yarn of a certain length.

[0012] In one embodiment, it is preferable that the let-off device start the shortening of the let-off width at the timing when the amount of accumulation of the yarn on the above-mentioned yarn accumulation roller becomes a predetermined amount or less, after the spinning of the spinning device is stopped, in the winding interruption operation.

[0013] Thus, the influence of the shortening of the let-off width on the shape of the package can be reduced.

[0014] In one embodiment, it is preferable that the spinning machine be provided with a yarn accumulation amount sensor that detects the amount of accumulation of the yarn on the yarn accumulation roller.

[0015] Thus, the shortening of the let-off width can be performed at the correct timing based on the detection result of the yarn accumulation amount sensor.

[0016] In one embodiment, it is preferable that the shortening of the above-mentioned let-off width be performed together with the deceleration of the rotation speed of the package, in the winding interruption operation.

[0017] If the rotation speed of the package is decelerated, there is a tendency that the tension of the yarn between the yarn accumulation roller and the package becomes unstable. Thus, assuming that the cross direction width does not change, it is estimated that the yarn will be wound at the position of the winding width from the package. However, as described above, by performing the shortening of the cross direction width and the deceleration of the rotation speed of the package, it is possible to effectively prevent the yarn from being wound at the position of the winding width from the package. Thus, it is possible to improve the quality of the package.

[0018] In one embodiment, preferably, in the package winding interruption operation, the cross direction speed of the cross direction device is decelerated in conjunction with the deceleration of the rotation speed of the package.

[0019] Thus, it is possible to prevent the winding angle of the yarn wound by the package from sharply changing due to the deceleration of the rotation speed of the package.

[0020] In one embodiment, preferably, the above-described package winding device, in the package winding interruption operation, stops the rotation of the package so that the yarn end of the yarn on the package side is located on the surface of the package.

[0021] Thus, it is possible to easily capture the yarn end located on the surface of the package.

[0022] In one embodiment, preferably, the following configuration is employed. That is, the spinning machine is provided with a joint device and a capture guide device. The joint device performs the joint of the yarn on the spinning device side and the yarn on the package side when the yarn is broken between the spinning device and the package winding device. The capture guide device is capable of capturing the yarn on the package side and guiding it to the joint device when the yarn is broken between the spinning device and the package winding device. The package winding device is provided with a creel capable of holding a bobbin for winding the yarn into a package. The width of the front end of the capture guide device is smaller than the width of the creel in the cross direction of the cross direction device. For example, the width of the front end of the capture guide device can be set to be 1 / 2 or less of the width of the creel.

[0023] Thus, it is possible to achieve the downsizing of the capture guide device.

[0024] In one embodiment, preferably, the spinning machine is provided with a capture device provided with respect to the yarn travel path, which captures the yarn on the package side when the yarn is broken between the spinning device and the package winding device, and the capture device captures the yarn on the downstream side in the yarn travel direction from the yarn accumulation device and on the upstream side in the yarn travel direction from the package winding device.

[0025] Thus, it is possible to capture the yarn on the package side by a device with a simple configuration.

[0026] In one embodiment, preferably, in the take-up interruption operation, it is determined whether the yarn on the package side can be caught by the catching device, and in the case where the yarn on the package side cannot be caught by the catching device, the yarn on the package side is caught by the catching guide device, and the shortening of the traversing width is started before the determination of whether the yarn on the package side can be caught by the catching device.

[0027] Thus, it is first determined whether the yarn on the package side can be caught by the catching device, whereby the operation cycle time of the joint can be improved. Further, even in the case where the yarn on the package side cannot be caught by the catching device, the yarn end of the yarn wound on the package with the shortened traversing width is caught by the catching guide device, whereby the quality of the package can be improved as described above. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a front view showing the overall configuration of a spinning machine according to one embodiment of the present application.

[0029] Figure 2 is a side view showing a spinning unit of the spinning machine.

[0030] Figure 3 is a side view showing a state where a breakage of spun yarn has occurred in the spinning unit.

[0031] Figure 4 is a side view showing a state where the yarn end of the spun yarn on the package side is separated from the yarn storage roller and the rotation of the package is stopped.

[0032] Figure 5 is a front view showing the traversing width of the traversing device that traverses the spun yarn in the state of Figure 3

[0033] is a side view showing a state where the spun yarn on the package side is caught by the suction nozzle of the joint trolley and the spun yarn on the spinning device side is caught by the suction tube, and both are guided to the joint device from the state of Figure 6 Figure 4 is a side view showing a state where the spun yarn on the package side is caught by the suction nozzle of the joint trolley and the spun yarn on the spinning device side is caught by the suction tube, and both are guided to the joint device from the state of

[0034] Figure 7 is a side view showing a state where the spun yarn on the package side is caught by the suction nozzle of the joint trolley and the spun yarn on the spinning device side is caught by the suction tube, and both are guided to the joint device from the state of

[0035] Figure 8 is a side view showing a spinning unit of a spinning machine according to a modified example.

[0036] Figure 9 is a side view showing a state where the spun yarn on the package side is caught by the suction nozzle of the joint trolley and the spun yarn on the spinning device side is caught by the suction tube, and both are guided to the joint device from the state of DETAILED DESCRIPTION

[0037] A spinning machine (yarn winding machine) 1 of one embodiment of the present application will be described with reference to the drawings. In the following description, "upstream side" and "downstream side" refer to the upstream side and the downstream side, respectively, of the traveling direction (yarn traveling direction) of a spun yarn (yarn) 5, sliver 4a, or fiber bundle 4b at the time of winding of the spun yarn 5.

[0038] As shown in Figure 1 , the spinning machine 1 is provided with a blow box 111, a control box 112, a plurality of spinning units 2, and a joint trolley (work trolley) 80. The plurality of spinning units 2 are arranged in a prescribed direction. Each spinning unit 2 (spinning machine 1) performs spinning using a spinning device 22 or the like described later. In the present embodiment, the spinning machine 1 is configured as an air-jet spinning machine.

[0039] A blower 113 or the like that functions as a suction source is arranged in the blow box 111.

[0040] A central control device 115, a display portion 116, and an operation portion 117 are arranged in the control box 112.

[0041] The central control device 115 centrally manages and controls each portion of the spinning machine 1. The central control device 115 is connected to a unit control portion (control portion) 15 provided in each spinning unit 2 as shown in Figure 2 . In the present embodiment, each spinning unit 2 is provided with the unit control portion 15, but one unit control portion 15 can be shared by a prescribed number (for example, 2 or 4) of spinning units 2.

[0042] The display portion 116 can display the contents of the settings of the spinning unit 2 and / or information related to the state of each spinning unit 2, and the like. An operator operates the operation portion 117 in order to perform the settings of the spinning machine 1 and / or in order to perform the selection of the information displayed by the display portion 116. The display portion 116 and the operation portion 117 can be constituted by a touch panel display.

[0043] As shown in Figure 2 , each spinning unit 2 is provided with a draft device 21, a spinning device (yarn supply device) 22, a yarn storage device 23, and a winding device 25. These devices are arranged in the traveling direction of the spun yarn 5 or the like in order from the upstream side toward the downstream side.

[0044] The joint trolley 80 is provided so as to be movable with respect to each spinning unit 2. One joint trolley 80 is provided for the plurality of spinning units 2. One joint trolley 80 is illustrated in Figure 1 , but the spinning machine 1 can be provided with a plurality of joint trolleys 80.

[0045] The draft device 21 is provided at an upper portion of the spinning unit 2 (the spinning machine 1). The draft device 21 is provided with a plurality of pairs of draft rollers. Each pair of draft rollers is composed of two draft rollers.

[0046] Specifically, the draft device 21 is provided with four pairs of draft rollers. The four pairs of draft rollers are, in order from an upstream side toward a downstream side, a rear pair of rollers 41, a third pair of rollers 42, an intermediate pair of rollers 43, and a front pair of rollers 44. A godet 45 is provided on each draft roller of the intermediate pair of rollers 43.

[0047] The four pairs of draft rollers each have a driving roller and a driven roller that face each other. For the four pairs of draft rollers, a driving source such as a motor that is not shown is provided on each driving roller. Each driving roller is rotationally driven by the driving source with the axis of the driving roller as the center. The driven roller of each pair of draft rollers is provided so as to be able to rotate with the axis of the driven roller as the center via a bearing or the like that is not shown.

[0048] The draft device 21 carries the sliver 4a supplied from the sliver supply portion 20 by sandwiching the sliver 4a between the draft rollers (between the driving roller and the driven roller) of each pair of draft rollers, thereby stretching (drafting) the sliver 4a to a prescribed fiber amount (or thickness) to generate a fiber bundle 4b. The fiber bundle 4b generated by the draft device 21 is supplied to the spinning device 22.

[0049] The sliver supply portion 20 is disposed on the upstream side of the draft device 21. A container that accommodates the sliver 4a, that is, a bobbin is disposed in the sliver supply portion 20.

[0050] The spinning device 22 is configured as an air jet spinning device in the present embodiment. The spinning device 22 imparts a twist-back air flow to the fiber bundle 4b (the drafted sliver 4a) generated by the draft device 21, thereby twisting to generate a yarn 5. The spinning device 22 is disposed on the downstream side of the draft device 21.

[0051] In the spinning unit 2 (the spinning machine 1), a yarn supply device composed of the spinning device 22 supplies the yarn 5. The yarn 5 generated by the yarn supply device travels from the yarn supply device toward a take-up device 25, and is taken up by the take-up device 25. A yarn path through which the yarn 5 travels is formed between the yarn supply device and the take-up device 25.

[0052] A yarn accumulation device 23 draws out the yarn 5 generated by the spinning device 22 from the spinning device 22 and temporarily accumulates the yarn 5. The yarn accumulation device 23 is disposed in the yarn path formed between the yarn supply device and the take-up device 25. Specifically, the yarn accumulation device 23 is disposed at a position on the downstream side from the spinning device 22.

[0053] The yarn accumulation device 23 is provided with a yarn accumulation roller 51, an electric motor 52, a thread hanging member 53, a thread guide 54, and a yarn accumulation amount detection sensor (yarn accumulation amount sensor) 56.

[0054] The yarn accumulation roller 51 is rotationally driven by an electric motor 52. The yarn accumulation roller 51 temporarily accumulates the spun yarn 5 wound on the outer peripheral surface thereof. The yarn accumulation roller 51 is able to draw the spun yarn 5 from the spinning device 22 at a predetermined speed by rotating at a predetermined rotational speed in a state in which the spun yarn 5 is wound on the outer peripheral surface.

[0055] The thread hooking member 53 is able to hook the spun yarn 5. The thread hooking member 53 guides the spun yarn 5 to the outer peripheral surface of the yarn accumulation roller 51 by rotating integrally with the yarn accumulation roller 51 in a state in which the spun yarn 5 is hooked.

[0056] The thread guide 54 is disposed on the downstream side of the yarn accumulation roller 51. The thread guide 54 restricts the track of the spun yarn 5 traversed by the rotating thread hooking member 53, and stably guides the spun yarn 5 in the yarn path in which the spun yarn 5 travels on the downstream side (the take-up device 25 side) of the thread guide 54.

[0057] The yarn accumulation amount detection sensor 56 is able to detect the yarn accumulation amount of the yarn accumulation roller 51. The yarn accumulation amount detection sensor 56 is disposed to face an appropriate position of the outer peripheral surface of the yarn accumulation roller 51. The yarn accumulation amount detection sensor 56 detects the presence or absence of the spun yarn 5 at the position. The yarn accumulation amount detection sensor 56 transmits the detected detection signal to the unit control section 15. The unit control section 15 is able to detect whether or not the yarn accumulation amount is a predetermined amount or more on the basis of the detection signal.

[0058] The yarn accumulation device 23 is able to temporarily accumulate the spun yarn 5 on the outer peripheral surface of the yarn accumulation roller 51, and thus functions as a kind of buffer for the spun yarn 5. Thus, it is possible to eliminate an undesirable situation (for example, slackening of the spun yarn 5, etc.) caused by the fact that the spinning speed of the spinning device 22 and the take-up speed (the traveling speed of the spun yarn 5 wound on the package 7 described later) become inconsistent for some reason.

[0059] The yarn monitoring device 47 is provided between the spinning device 22 and the yarn accumulation device 23. The yarn monitoring device 47 detects the state of the spun yarn 5 on the upstream side (the supply device side) of the yarn accumulation device 23. The spun yarn 5 generated by the spinning device 22 passes through the yarn monitoring device 47 before being accumulated by the yarn accumulation device 23.

[0060] The yarn monitoring device 47 detects the quality of the traveling fine yarn 5 by a light sensor, and detects a yarn defect included in the fine yarn 5. As the yarn defect, for example, an abnormality in thickness of the fine yarn 5 and / or a foreign matter included in the fine yarn 5 are included. The yarn monitoring device 47 transmits a yarn defect detection signal to the unit control section 15 in a case where a yarn defect of the fine yarn 5 is detected. The yarn monitoring device 47 can monitor the quality of the fine yarn 5 using a sensor of an electrostatic capacitance type, for example, instead of the light sensor. The yarn monitoring device 47 can be configured to detect an abnormality in tension of the fine yarn 5 instead of or on the basis of these yarn defects.

[0061] In order to maintain the yarn quality, it is preferable to remove the yarn defect and the abnormal portion. The unit control section 15 determines whether or not to cut the fine yarn 5 on the basis of the detection result of the yarn monitoring device 47. The cutting of the fine yarn 5 is realized by the control of the unit control section 15 in such a manner that the spinning of the spinning device 22 is stopped. The cutting of the fine yarn 5 can also be realized by stopping the drafting of the drafting device 21 (for example, the rotation of the back roller pair 41). In either case where the spinning of the spinning device 22 is stopped or where the supply of the fiber bundle from the drafting device 21 to the spinning device 22 is stopped, the spinning of the spinning device 22 is substantially interrupted. The spinning unit 2 can be provided with a cutter, and the unit control section 15 performs the cutting of the fine yarn 5 by the cutter. In a case where the fine yarn 5 is cut by the cutter, the unit control section 15 also performs the control in such a manner that the spinning of the spinning device 22 is substantially interrupted.

[0062] The take-up device 25 takes up the fine yarn 5 after the yarn accumulation device 23 to form a package 7. The take-up device 25 is disposed at a position on the downstream side of the yarn accumulation device 23.

[0063] The take-up device 25 is provided with a creel 71, a package rotation device 72, and a traversing device 73.

[0064] The creel 71 is provided with a pair of creel arms 74. The creel 71 can support a bobbin 7a (further, a package 7) for taking up the fine yarn 5 between the pair of creel arms 74 so as to be rotatable. The creel arms 74 can rotate about a fulcrum 75.

[0065] The package rotation device 72 is provided with a take-up drum 76 and a drum drive motor 77. The take-up drum 76 can be in contact with the outer peripheral surface of the bobbin 7a or the package 7. The output shaft of the drum drive motor 77 is linked to the take-up drum 76 through an appropriate mechanism. The take-up drum 76 is driven by the drum drive motor 77, whereby the package 7 can be rotated in a take-up direction. The drum drive motor 77 is configured to be able to rotate in both directions. Thus, the package 7 can also be rotated in a direction opposite to the take-up direction.

[0066] The traverse device 73 includes a yarn guide 78 and a traverse drive motor 79. The yarn guide 78 is capable of hooking the yarn 5 wound on the package 7. The yarn guide 78 is capable of reciprocating in the winding width direction of the package 7. The output shaft of the traverse drive motor 79 is connected to the yarn guide 78 via a suitable unit (e.g., a belt). With the yarn 5 held on the yarn guide 78, the yarn 5 wound on the package 7 can be traversely moved by reciprocatingly driving the yarn guide 78 by the traverse drive motor 79.

[0067] The take-up device 25 reciprocates the yarn guide 78 of the traverse device 73 while rotating the take-up roller 76 of the package rotation device 72. Thus, the take-up device 25 takes the yarn 5 into the package 7 while traversing the yarn 5.

[0068] In this embodiment, each spinning unit 2 is provided with a separate roller drive motor 77. Furthermore, each spinning unit 2 is provided with a separate traverse drive motor 79. Therefore, the take-up roller 76 and the yarn guide 78 can operate independently of the take-up roller 76 and the yarn guide 78 of the other spinning units 2.

[0069] like Figure 1 As shown, a track 101 is provided on the spinning machine 1. The track 101 is configured to extend along the direction in which the plurality of spinning units 2 are arranged. A splicing carriage 80 is configured to travel on the track 101. Thus, the splicing carriage 80 can move relative to the plurality of spinning units 2. The splicing carriage 80 travels to the working position corresponding to the spinning unit 2 that has produced the broken yarn 5, and performs splicing processing in that spinning unit 2.

[0070] The connector trolley 80 includes traveling wheels 81, connector device 82, suction pipe 83, suction nozzle (capture guide device) 84, and trolley control unit 85.

[0071] The traveling wheels 81 are configured to be driven to rotate via a drive mechanism (e.g., a motor) that is not shown in the figure. Driven by the traveling wheels 81, the jointing trolley 80 can travel relative to the multiple spinning units 2 respectively.

[0072] The suction tube 83 is a component with a tubular portion. An opening is formed at the front end 88 of the suction tube 83. The suction tube 83 is connected to a suitable suction source (e.g., a blower 113). Thus, the front end 88 of the suction tube 83 can generate a suction airflow. The suction tube 83 is supported so that it can rotate. By rotating the suction tube 83, the front end 88 can be moved to a position close to the spinning device 22 (capturing position) or a retracted position (standby position). In the event of a break in the yarn 5, the suction tube 83 can draw in the yarn 5 on the side of the spinning device 22 for capture at a position close to the spinning device 22.

[0073] The suction nozzle 84 is a member having a tubular portion. An opening is formed at a front end 89 of the suction nozzle 84. The suction nozzle 84 is connected to an appropriate suction source (e.g., a blower 113). Thus, the opening of the front end 89 of the suction nozzle 84 can be caused to draw in air. The suction nozzle 84 is supported so as to be rotatable. By rotating the suction nozzle 84, the opening of the front end 89 can be caused to approach or retreat from the take-up device 25. In the case where a breakage of the spun yarn 5 occurs, the suction nozzle 84 can capture the spun yarn 5 on the take-up device 25 side (the package 7 side) from the front end 89 at a position where the take-up device 25 is approached.

[0074] By rotating the suction pipe 83 to one side, the front end 88 moves in a direction approaching the spinning device 22, and in this state, the end of the spun yarn 5 is captured. Thereafter, the suction pipe 83 is rotated to the other side. Thus, the front end 88 of the suction pipe 83 moves in a direction away from the spinning device 22.

[0075] By rotating the suction nozzle 84 to one side, the front end 89 moves in a direction approaching the take-up device 25, and in this state, the spun yarn 5 is captured. Thereafter, the suction nozzle 84 is rotated to the other side. Thus, the front end 89 of the suction nozzle 84 moves in a direction away from the take-up device 25.

[0076] After the breakage of the spun yarn 5 occurs, the joint device 82 performs a joint of the spun yarn 5 on the spinning device 22 side captured by the suction pipe 83 and the spun yarn 5 on the package 7 side captured by the suction nozzle 84. In the present embodiment, the joint device 82 is a splicing device that splices the ends of the yarns to each other using a twist-back air flow. The joint device 82 is not limited to the above-described splicing device, and can be, for example, a mechanical knotter or the like.

[0077] The trolley control section 85 is configured as a known computer having a CPU, a ROM, a RAM, and the like, which are not shown. The trolley control section 85 controls the joint processing performed by the joint trolley 80 by controlling the operations of the respective sections provided in the joint trolley 80.

[0078] The joint trolley 80 normally stands by at an appropriate position on the track 101. When a breakage of the spun yarn 5 occurs in a certain spinning unit 2, the joint trolley 80 moves to the spinning unit 2 where the breakage of the spun yarn 5 occurs.

[0079] Next, the operations of the respective sections at the time of jointing when the spinning is interrupted due to the breakage of the spun yarn 5 in the state shown in Figure 2 In this process, the take-up device 25 performs a take-up interruption operation of stopping the rotation of the package 7. Hereinafter, the case where the spun yarn 5 is cut based on the detection result of the yarn monitoring device 47 will be described as an example.

[0080] First, the unit control section 15 stops the yarn feeding of the yarn feeding device (spinning device 22) based on the yarn defect detection signal inputted from the yarn monitoring device 47. By the stop of the yarn feeding of the yarn feeding device, the spun yarn 5 is cut. Thus, as shown in FIG. 8, the breakage of the spun yarn 5 is generated. The yarn defect detected by the yarn monitoring device 47 is contained in the spun yarn 5 on the package 7 side. Figure 3

[0081] The unit control section 15 sends the joint request signal to the trolley control section 85 at an appropriate timing after the yarn monitoring device 47 detects the yarn defect. The trolley control section 85, which receives the joint request signal, makes the joint trolley 80 travel to and stop after the subject spinning unit 2 where the breakage of the spun yarn 5 is generated.

[0082] At the timing when the yarn monitoring device 47 detects the yarn defect and the spinning device 22 interrupts the spinning, Figure 3 Generally, the package 7 rotates at high speed. The spun yarn 5 is pulled out from the yarn storage roller 51 in accordance with the rotation of the package 7, and the yarn storage amount of the yarn storage roller 51 gradually decreases. When the yarn storage amount becomes zero, the yarn end of the spun yarn 5 on the package 7 side is detached from the yarn storage roller 51. By further continuing the rotation of the package 7, the yarn end reaches the package 7.

[0083] In the present embodiment, the control is performed so that the rotation in the winding direction of the package 7 is stopped substantially simultaneously with the yarn end of the spun yarn 5 on the package 7 side coming into contact with the outer peripheral surface of the package 7. In the present embodiment, the control is performed so that the rotation in the winding direction of the package 7 is stopped substantially simultaneously with the yarn end of the spun yarn 5 on the package 7 side coming into contact with the outer peripheral surface of the package 7. Figure 4 A state where the rotation of the package 7 is stopped is shown in FIG. 9. Thus, the head of the yarn end of the spun yarn 5 on the package 7 side to be wound on the outer peripheral surface of the package 7 can be almost eliminated, and thus the yarn end is easily detached from the spun yarn 5 on the outer peripheral surface of the package 7. Therefore, the yarn end can be easily caught by the suction nozzle 84 thereafter.

[0084] Further, by the above-described control, the position of the yarn end of the spun yarn 5 on the package 7 side can be made substantially constant in the circumferential direction of the package 7 at the timing when the rotation of the package 7 is stopped. Therefore, by making the front end 89 of the suction nozzle 84 accurately approach a prescribed position of the outer peripheral surface of the package 7, the yarn end of the spun yarn 5 on the package 7 side can be caught. Thus, the following two points can be achieved. The first point is that the package 7 does not need to be reversely rotated in order to make the suction flow of the suction nozzle 84 act on the entire outer peripheral surface of the package 7, and thus the catching of the spun yarn 5 on the package 7 side can be achieved in a short time. The second point is that the opening of the front end 89 of the suction nozzle 84 in the rotation direction of the package 7 can be reduced.

[0085] In addition, in the spinning unit 2 of the present embodiment, the winding device 25 is located at the lower end portion of the yarn path, and thus the rotation of the package 7 can be stopped at a timing when the yarn end of the spun yarn 5 on the package 7 side reaches a little ahead of the package 7. In this case, after the rotation of the package 7 is stopped, the yarn end of the spun yarn 5 on the package 7 falls down to the outer peripheral surface of the package 7 or the vicinity thereof due to the gravity.​

[0086] As described above, the yarn accumulation device 23 is provided with the yarn accumulation amount detection sensor 56 for detecting the yarn accumulation amount of the yarn accumulation roller 51. Therefore, based on the timing at which the yarn accumulation amount detection sensor 56 detects that the yarn accumulation amount of the yarn accumulation roller 51 becomes below the prescribed amount, the timing at which the yarn end of the spun yarn 5 on the package 7 side reaches the package 7 can be calculated according to the rotational speed of the package 7 or the like. Alternatively, the timing at which the yarn end of the spun yarn 5 on the package 7 side reaches the package 7 can be set to be a prescribed time after the timing at which the yarn accumulation amount detection sensor 56 detects that the yarn accumulation amount of the yarn accumulation roller 51 becomes below the prescribed amount.

[0087] In the present embodiment, after the spinning device 22 interrupts spinning and before the spun yarn 5 on the package 7 side is completely wound on the package 7, control is performed to decelerate the rotation of the package 7. The timing at which the deceleration is started can be simultaneous with the interruption of spinning by the spinning device 22, or can be after a prescribed time has elapsed from the interruption of spinning. By decelerating the rotational speed of the package 7 to some extent in advance, the rotation of the package 7 can be easily stopped at the accurate timing at which the yarn end of the spun yarn 5 on the package 7 side reaches the package 7.

[0088] When the control to decelerate the rotational speed of the package 7 is performed, the tension of the spun yarn 5 between the yarn accumulation roller 51 and the package 7 sometimes becomes unstable. Therefore, the position at which the spun yarn 5 is guided toward the outer peripheral surface of the package 7 by the guide 78 easily becomes unstable.

[0089] Therefore, it is preferable to shorten the traverse width to avoid the spun yarn 5 being wound at a position deviating from the winding width of the package 7 (hereinafter referred to as end face drop).

[0090] Therefore, the unit control section 15 can also perform control so that the traverse width of the traversing device 73 is narrower than usual in conjunction with the deceleration control of the rotation of the package 7. The traverse width can be shortened discontinuously, or can be slowly shortened over time. The shortening of the traverse width can also be started before the deceleration of the rotation of the package 7.

[0091] After the spun yarn 5 on the package 7 side is separated from the yarn accumulation roller 51 and the thread hanging member 53, the tension of the spun yarn 5 disappears, and therefore it is difficult to guide the position of the spun yarn 5 on the package 7 side by the guide 78. Thus, the shortening of the traverse width of the traversing device 73 is preferably substantially completed before the yarn end of the spun yarn 5 on the package 7 side is separated from the yarn accumulation roller 51. In the configuration of the present embodiment, in the case where a break in the spun yarn 5 occurs, if the spun yarn 5 of a certain length is wound on the yarn accumulation roller 51, it is easy to secure the time for shortening the traverse width.

[0092] In the present embodiment, the yarn accumulation device 23 is provided with the yarn accumulation amount detection sensor 56 for detecting the yarn accumulation amount of the yarn accumulation roller 51. Therefore, based on the timing at which the yarn accumulation amount detection sensor 56 detects that the yarn accumulation amount of the yarn accumulation roller 51 becomes below the prescribed amount, the timing at which the yarn end of the spun yarn 5 on the package 7 side reaches the package 7 can be calculated according to the rotational speed of the package 7 or the like. Alternatively, the timing at which the yarn end of the spun yarn 5 on the package 7 side reaches the package 7 can be set to be a prescribed time after the timing at which the yarn accumulation amount detection sensor 56 detects that the yarn accumulation amount of the yarn accumulation roller 51 becomes below the prescribed amount. Figure 5The usual traverse width W1 and the shortened traverse width W2 are shown in FIG. 1. The traverse width W1 at the time of spinning is determined based on the package winding width set by the operation section 117 described above. In Figure 5 In FIG. 1, the traverse width W1 is shown as one width, and the traverse width W2 is also shown as one width. However, the traverse widths W1 and W2 can also vary within a certain range. For example, the traverse device 73 can also perform a creep control that causes the traverse width W1 to pulsate. Alternatively, the traverse device 73 can also narrow the traverse width W1 in conjunction with the take-up of the package 7. Further, the traverse device 73 can also reciprocate the guide 78 in a manner that narrows the traverse width W2.

[0093] The traverse of the spun yarn 5 with the shortened traverse width W2 is continued until the rotation in the take-up direction of the package 7 stops. Thereby, the position of the yarn end of the spun yarn 5 on the package 7 side is less likely to deviate in the winding width direction. Thus, thereafter, the yarn end can be easily captured by the suction nozzle 84. In addition, in the case where the yarn end is captured by the suction nozzle 84, the yarn end can be easily guided to the yarn end detector 48. Figure 5 In FIG. 1, the center of the traverse width W2 is shown as coinciding with the center of the traverse width W1, but these centers do not necessarily have to coincide. In other words, the traverse width W2 can also be biased to be formed in a manner that approaches either end of the package 7.

[0094] The traverse of the spun yarn 5 with the shortened traverse width W2 can also be ended before the rotation in the take-up direction of the package 7 stops. In this case, the package 7 is caused to move away from the take-up drum 76 before a prescribed time at which the rotation in the take-up direction of the package 7 stops, and the spun yarn 5 is removed from the guide 78. As a result, on the yarn layer in which the spun yarn 5 is wound with the shortened traverse width W2, a yarn layer (ribbon winding) in which the traverse width is further shortened is formed. The method of removing the spun yarn 5 from the guide 78 is not limited to the example described above.

[0095] The shortened traverse width W2 is preferably 1 / 2 or less of the maximum width of the traverse width W1. Further, the shortened traverse width W2 is preferably 10 mm or less. Assuming that the spun yarn 5 sometimes enters the inside of the spun yarn 5 before winding 1 turn is completed in the case where the traverse is not performed at all. Even with a small reciprocating stroke of 10 mm or less, such a phenomenon can be prevented by performing the traverse.

[0096] Either one of the following is performed: the traverse width W1 is switched to the traverse width W2 based on the detection of a yarn defect by the yarn monitoring device 47, the detection of the breakage of the spun yarn 5 by the yarn monitoring device 47 or the like, the detection of the yarn accumulation amount of the yarn accumulation roller 51 becoming a prescribed amount or less by the yarn accumulation amount detection sensor 56, and the elapse of a prescribed time after the detection of the yarn accumulation amount of the yarn accumulation roller 51 becoming a prescribed amount or less by the yarn accumulation amount detection sensor 56.

[0097] As described above, the present application is not limited to the above-described embodiment.Figure 1 As shown, the width W3 of the front end 89 of the suction nozzle 84 is formed to be large so as to be able to cause the suction air flow to act on the entire winding width of the package 7. However, as described above, by limiting the position of the yarn end of the spun yarn 5 on the package 7 side, there is room to shorten the width W3 of the front end 89 of the suction nozzle 84. For example, the width W3 of the front end 89 of the suction nozzle 84 can be made smaller than the width W4 of the creel 71. Further, the width W3 of the front end 89 of the suction nozzle 84 can be set to be 1 / 2 or less of the width W4 of the creel 71.

[0098] Thus, in the case where the traverse width is shortened, it is sufficient to cause the suction air flow to act only on a portion corresponding to the shortened traverse width W2. Thus, downsizing of the suction nozzle 84 can be achieved. Further, since the suction port of the front end 89 can be downsized, energy saving of the suction source can be achieved.

[0099] The unit control section 15 controls so as to decelerate the traverse speed of the traverse device 73 in conjunction with the deceleration control of the rotation of the package 7 compared to normal. That is, control is performed so as to make the change in the winding angle of the spun yarn 5 by the package 7 smaller. Further, the traverse speed is, for example, the speed from one end of the traverse width toward the other end. By decelerating the traverse speed, for example, the maximum speed of the traverse speed can be reduced, the acceleration can be reduced, or the deceleration can be increased. That is, the time for the guide 78 to move from one end of the traverse width to the other end becomes longer.

[0100] After that, the unit control section 15 determines whether the joining trolley 80 has reached the spinning unit 2, and stands by until the joining trolley 80 reaches the spinning unit 2 in the case where the joining trolley 80 has not reached the spinning unit 2. Figure 4 A state where the joining trolley 80 has reached is shown in FIG. 8.

[0101] The joining trolley 80, when reaching the operating position of the spinning unit 2, causes the suction nozzle 84 to approach the take-up device 25 as shown by the alternate long and short dash line in FIG. 9. Figure 6 By this, the suction nozzle 84 can catch the spun yarn 5 on the package 7 side.

[0102] In this state, the spinning unit 2 rotates the package 7 in the opposite direction by the take-up device 25. The opposite direction rotation of the package 7 is continued until the portion containing the yarn defect in the spun yarn 5 on the package 7 side is all sucked by the suction nozzle 84. The spun yarn 5 wound in the shortened traverse width W2 is sometimes all unwound from the package 7 by this opposite direction rotation, and sometimes a part remains in the package 7.

[0103] After that, the suction nozzle 84 retreats from the take-up device 25. As a result, the spun yarn 5 on the package 7 side is guided to the joining device 82. Until this time, the reverse rotation of the package 7 is stopped.

[0104] The case where the nozzle 84 fails to catch the thread 5 for some reason is also taken into consideration. In this case, the unit control section 15 preferably performs control to make the package 7 alternately perform reverse rotation at a small angle and forward rotation. Thereby, the success rate of the catching of the thread 5 can be improved. For example, whether the nozzle 84 has caught the thread 5 can be determined by detecting the thread 5 inside the nozzle 84 by a sensor.

[0105] The trolley control section 85 controls the joint trolley 80 to move the suction pipe 83 to a position where the thread 5 on the spinning device 22 side can be caught as shown by the one-dot chain line in FIG. 6. Almost at the same time, the unit control section 15 makes the thread supply device restart the supply of the thread 5. Figure 6

[0106] The trolley control section 85 guides the thread 5 on the spinning device 22 side caught by the suction pipe 83 to the lower joint device 82 as shown by the solid line in FIG. 7. In conjunction therewith, the thread 5 pulled out from the spinning device 22 is hooked by the hank member 53, and the thread 5 is wound on the yarn accumulation roller 51 by the rotating hank member 53 as shown by the two-dot chain line in FIG. 7. Figure 6 Figure 5

[0107] The accumulation amount of the thread 5 on the yarn accumulation roller 51 increases to a certain extent at a timing shown by the one-dot chain line in FIG. 8, the trolley control section 85 makes the joint device 82 act, and performs the joint of the thread 5 on the take-up device 25 side attracted by the nozzle 84 and the thread 5 on the spinning device 22 side. In the joint, the thread 5 is continuously supplied from the thread supply device, but the thread 5 is accumulated by the yarn accumulation device 23. Figure 7

[0108] In the joint, the excess thread 5 is cut in the joint device 82. By this cutting, the portion of the thread 5 on the package 7 side where the yarn defect detected by the yarn monitoring device 47 is cut out. The excess thread 5 cut is sucked into the suction pipe 83 or the nozzle 84 and discarded.

[0109] Almost at the same time when the joint ends, the take-up device 25 starts to be driven, and the take-up device 25 restarts the winding of the package 7. Thus, the spinning unit 2 returns to the normal state shown in FIG. 1. Figure 2

[0110] ​​​​​Also considered is a case where, although the excess spun yarn 5 is cut in the joint device 82, the joint cannot be performed due to some reason resulting in a joint error. In this case, the unit control section 15 rotates the package 7 in the take-up direction, thereby bringing the yarn end of the spun yarn 5 on the package 7 side to the package 7. As with the above, it is preferable to control so as to stop the rotation of the package 7 in the take-up direction at substantially the same time or slightly before the timing at which the spun yarn 5 on the package 7 side comes into contact with the outer peripheral surface of the yarn end package 7. Further, it is preferable to cause the spun yarn 5 taken up to the package 7 to traverse at a narrower traverse width W2 than usual by the traverse device 73. Thereafter, the capturing of the yarn end of the spun yarn 5 by the nozzle 84, the inversion of the package 7, and the guiding of the spun yarn 5 by the nozzle 84 toward the joint device 82 are performed again.

[0111] The joint error can be detected by a monitoring sensor provided to the joint trolley 80. The monitoring sensor is provided to the immediately downstream side of the joint device 82. In order to guide the spun yarn 5 to the monitoring sensor, a yarn moving device, which is omitted from the illustration, that actively moves the spun yarn 5 can also be provided to the joint trolley 80. The yarn moving device can be configured as, for example, a nozzle device that blows pressurized air to the spun yarn 5 to move it. Thereby, the monitoring sensor can detect the joint error as early as possible.

[0112] As explained above, the spinning machine 1 of the present embodiment is provided with a plurality of spinning units 2. Each of the spinning units 2 is provided with a spinning device 22, a take-up device 25, and a yarn storage device 23. The spinning device 22 can generate the spun yarn 5 by spinning the fiber bundle 4b and supply the spun yarn 5. The take-up device 25 takes up the spun yarn 5 supplied from the spinning device 22 while traversing it to form the package 7. The yarn storage device 23 is disposed midway through the yarn travel path formed between the spinning device 22 and the take-up device 25. The yarn storage device 23 is provided with a yarn storage roller 51 and a yarn hanging member 53. The yarn storage roller 51 can wind the spun yarn 5 on the outer periphery to store it. The yarn hanging member 53 is configured to be rotatable and applies tension to the spun yarn 5 by hooking the spun yarn 5 unwound from the yarn storage roller 51. The take-up device 25 of each of the spinning units 2 is provided with a package rotation device 72 and a traverse device 73. The package rotation device 72 is driven independently for each of the spinning units 2 to rotate the package 7. The traverse device 73 is driven independently for each of the spinning units 2 to traverse the spun yarn 5 wound to the package 7. In the take-up interruption operation of the take-up device 25, the spinning of the spinning device 22 is stopped, and when the take-up stop control of the package 7 is performed, the spun yarn 5 is connected between the yarn storage roller 51 and the package 7, and the spun yarn 5 is traversed by the traverse device 73 at a traverse width W2 that is shorter than before the start of the take-up interruption operation while tension is applied to the spun yarn 5 by the yarn hanging member 53.

[0113] Thus, in the state where the rotation of the package 7 is stopped, it is possible to restrict the position of the yarn end of the spun yarn 5 on the package 7 side to a region corresponding to the shortened cross direction width W2. Thus, it is possible to easily perform the capture of the yarn end after the rotation of the package 7 is stopped. Further, during the cross winding of the spun yarn 5 with the shortened cross direction width W2 after the spinning is stopped, the tension is applied to the spun yarn 5 by the thread catching member 53, and thus the quality of the portion wound during this period can also be maintained to the same degree as before the spinning is stopped. Thus, it is also possible to improve the quality of the package 7.

[0114] In the spinning machine 1 of the present embodiment, the shortened cross direction width W2 can be set to be 1 / 2 or less of the maximum width with which the cross winding device 73 can cross wind the spun yarn 5. Further, the shortened cross direction width W2 can be set to be 10 mm or less.

[0115] Thus, the capture of the yarn end becomes easy.

[0116] In the spinning machine 1 of the present embodiment, in the winding interruption operation of the winding device 25, the cross winding device 73 can start the shortening of the cross direction width at the same time as or immediately after the spinning device 22 stops the spinning.

[0117] Thus, it is possible to perform the shortening of the cross direction width for a certain length of the spun yarn 5.

[0118] In the winding interruption operation of the winding device 25, the cross winding device 73 can also start the shortening of the cross direction width at the timing when the amount of yarn accumulation of the yarn accumulation roller 51 becomes the prescribed amount or less after the spinning device 22 stops the spinning.

[0119] In this case, it is possible to reduce the influence of the shortening of the cross direction width on the shape of the package 7.

[0120] The spinning machine 1 of the present embodiment is provided with a yarn accumulation amount detection sensor 56 that detects the amount of yarn accumulation of the yarn accumulation roller 51.

[0121] Thus, it is possible to perform the shortening of the cross direction width at the correct timing based on the detection result of the yarn accumulation amount detection sensor 56.

[0122] In the spinning machine 1 of the present embodiment, in the winding interruption operation of the winding device 25, the shortening of the cross direction width of the cross winding device 73 is performed together with the deceleration of the rotation speed of the package 7.

[0123] If the rotation speed of the package 7 is decelerated, there is a tendency that the tension of the yarn 5 between the yarn depositing roller 51 and the package 7 becomes unstable. Thus, assuming that the traverse width does not change, end face shedding is estimated to occur. However, as described above, by performing the shortening of the traverse width and the deceleration of the rotation speed of the package 7, the yarn 5 can be effectively prevented from being wound at a position deviated from the winding width of the package 7. Thus, the quality of the package 7 can be improved.

[0124] In the spinning machine 1 of the present embodiment, in the winding interruption operation of the winding device 25, the traverse speed of the traversing device 73 is decelerated in conjunction with the deceleration of the rotation speed of the package 7.

[0125] Thus, the winding angle of the yarn 5 of the package 7 can be prevented from sharply changing due to the deceleration of the rotation speed of the package 7.

[0126] In the spinning machine 1 of the present embodiment, in the winding interruption operation of the winding device 25, the winding device 25 stops the rotation of the package 7 so that the yarn end of the yarn 5 on the package 7 side is located on the surface of the package 7.

[0127] Thus, the yarn end located on the surface of the package 7 can be easily captured.

[0128] The spinning machine 1 of the present embodiment is provided with a joining device 82 and a suction nozzle 84. The joining device 82 performs joining of the yarn 5 on the spinning device 22 side and the yarn 5 on the package 7 side when the yarn 5 is broken between the spinning device 22 and the winding device 25. The suction nozzle 84 can capture the yarn 5 on the package 7 side and guide it to the joining device 82 when the yarn 5 is broken between the spinning device 22 and the winding device 25. The winding device 25 is provided with a creel 71 that can hold a bobbin 7a for winding the yarn 5 into the package 7. By the above-described shortening of the traverse width, the width W3 of the front end 89 of the suction nozzle 84 can be miniaturized in the traverse direction of the traversing device 73, for example, to be smaller than the width W4 of the creel 71 (W3 < W4). For example, the width W3 of the front end 89 of the suction nozzle 84 can be set to be 1 / 2 or less of the width W4 of the creel 71 (W3 ≤ W4 / 2).

[0129] Thus, miniaturization of the suction nozzle 84 can be achieved.

[0130] Next, a modification of the above-described embodiment will be described. In the description of the present modification, the same reference numerals are sometimes attached to the same or similar components as those of the above-described embodiment, and the description thereof will be omitted.

[0131] In the present modification, the winding interruption operation of the winding device 25 is performed in conjunction with the deceleration of the rotation speed of the package 7. Figure 8The spinning machine of the present modification example is provided with the suction device (catching device) 24 in each spinning unit 2. The spinning machine is capable of catching the spun yarn 5 on the package 7 side by the suction device 24 in the case where the spun yarn 5 is broken between the spinning device 22 and the yarn accumulation roller 51 due to interruption of spinning.

[0132] The suction device 24 is capable of sucking the spun yarn 5 on the package 7 side in the case where the spun yarn 5 is broken between the spinning device 22 and the take-up device 25. The suction device 24 is provided between the yarn accumulation device 23 and the take-up device 25. In the present modification example, the suction device 24 is fixedly provided, but can be provided so as to be slightly movable. For example, the suction device 24 can be provided so as to be movable in a direction of slightly approaching or retreating with respect to the yarn path. In other words, the suction device 24 is provided so as not to move like the suction nozzle 84.

[0133] The suction device 24 is provided with a suction pipe 61. A suction port 62 is formed at a front end (one end in the longitudinal direction) of the suction pipe 61. The suction port 62 is opened toward the aforementioned intermediate portion of the yarn path of the spinning unit 2. The suction pipe 61 is connected to a suction source such as a blower 113 via a pipe or the like. Thereby, a suction air flow is capable of being generated in the suction port 62 (inside the suction pipe 61). Unlike the suction nozzle 84, the suction pipe 61 is fixedly provided to the spinning unit 2. Thus, the position of the suction port 62 is constant.

[0134] The suction device 24 is provided with a shutter 63. The state of the suction device 24 is changed between a suction state and a suction stop state by the shutter 63. The shutter 63 is, for example, disposed between the suction port 62 and a portion of the suction device 24 that is located on a downstream side of the suction port 62 in the direction of air flow. The shutter 63 can be constituted by, for example, an opening and closing mechanism having a plate-like member. The shutter 63 is capable of being opened and closed by control of the unit control section 15. By opening the shutter 63 only when necessary, energy saving of the spinning machine 1 is capable of being achieved. In addition, the shutter 63 can also be omitted from the suction device 24.

[0135] The suction device 24 is located on an upstream side of the splicing device 82 provided to the joint trolley 80 when the joint trolley 80 is performing work on the spinning unit 2. The suction device 24 is capable of catching the spun yarn 5 on the take-up device 25 side, in other words, the package 7 side, on an upstream side of the splicing device 82 in the case where breakage of the spun yarn 5 occurs.

[0136] In the present modification example, the spun yarn 5 on the package 7 side is also capable of being caught by the suction nozzle 84 of the joint trolley 80. The unit control section 15 is capable of appropriately selecting which of the suction device 24 and the suction nozzle 84 to use to catch the spun yarn 5 on the package 7 side. Thus, in the present modification example, as to splicing in the case where breakage of the spun yarn 5 occurs, flexible action is capable of being performed compared to the aforementioned embodiment.

[0137] In Figure 8 Fig. 10, the state immediately after the breakage of the spun yarn 5 is shown. In the case where the spun yarn 5 on the side of the package 7 is caught by the suction device 24, the unit control section 15 continues the rotation of the package 7 at an appropriate speed. The spun yarn 5 is pulled out from the yarn accumulation roller 51 in accordance with the rotation of the package 7, and the yarn accumulation amount gradually decreases.

[0138] The unit control section 15 opens the closed gate 63 at a timing slightly before the spun yarn 5 is detached from the yarn accumulation device 23, and causes the suction device 24 to start suction. This timing can be set, for example, to a timing at which the yarn accumulation amount detection sensor 56 detects that the accumulation amount of the spun yarn 5 becomes a prescribed amount or less, and continues winding for a prescribed time.

[0139] Thereafter, in the process in which the spun yarn 5 on the side of the package 7 is wound on the package 7, at a timing at which the yarn end of this spun yarn 5 is located in a region that can be caught by the suction device 24, the unit control section 15 causes the winding of the winding device 25 to stop. The stop timing of the winding of the winding device 25 can be set, for example, to a timing that is almost the same as a timing at which the yarn end of the spun yarn 5 remaining on the yarn accumulation roller 51 departs from the yarn accumulation roller 51 and is detached from the guide 54.

[0140] As a result, as shown in Figure 9 , the spun yarn 5 on the side of the package 7 can be caught by being sucked in from the suction port 62 by the suction device 24. In Figure 9 , the joint trolley 80 is not shown, but when the joint trolley 80 reaches the spinning unit 2 in this state, the spun yarn 5 on the side of the package 7 held by the suction device 24 becomes a state of facing the joint device 82 of the joint trolley 80.

[0141] The joint trolley 80 catches the spun yarn 5 supplied from the spinning device 22 by the suction pipe 83 and guides it to the joint device 82. This operation is substantially the same as in the above-described embodiment, and thus the description is omitted. Thereafter, the joint device 82 performs the joint of the spun yarn 5 on the side of the winding device 25, which is sucked by the suction device 24, and the spun yarn 5 on the side of the spinning device 22.

[0142] In this modification, as shown in Figure 9 , the rotation of the package 7 is decelerated at an appropriate timing before the rotation of the package 7 is stopped. Thereby, the speed of the yarn end of the spun yarn 5 on the side of the package 7 through the suction port 62 of the suction device 24 becomes low, and thus this spun yarn 5 can be easily caught by the suction device 24. Also, the traverse width is shortened in accordance with the deceleration of the rotation of the package 7. Thereby, the above-described end face drop can be prevented.

[0143] As explained above, the spinning machine 1 of the present modification example is provided with the suction device 24 which is provided with respect to the yarn travel path and which is capable of capturing the spun yarn 5 on the package 7 side when the spun yarn 5 is broken between the spinning device 22 and the take-up device 25. The suction device 24 captures the spun yarn 5 on the downstream side of the yarn storage device 23 in the yarn travel direction and on the upstream side of the take-up device 25 in the yarn travel direction.

[0144] Thus, the spun yarn 5 on the package 7 side can be captured by the simply configured suction device 24.

[0145] In the present modification example, it is preferable that it is first determined whether the spun yarn 5 on the package 7 side can be captured by the suction device 24, and in the case where the spun yarn 5 cannot be captured by the suction device 24, the spun yarn 5 on the package 7 side is captured by the suction nozzle 84. Thus, even in the case where the spun yarn 5 cannot be captured by the suction device 24, the capture of the spun yarn 5 by the suction nozzle 84 can be performed by performing the control of the traverse width, as explained above. In the case where the spinning unit 2 is provided with the suction device 24, the shortening of the traverse width is performed before it is determined whether the spun yarn 5 on the package 7 side can be captured by the suction device 24. This is because, if the shortening of the traverse width is performed after the determination, the yarn end of the spun yarn 5 on the package 7 side can be taken up to the package 7 before the shortening of the traverse width is performed.

[0146] The above explanation has been made on the preferred embodiment and the modification example of the present application, but the above-described configuration can be changed, for example, as follows. The changes can be made individually, or a plurality of changes can be made arbitrarily in combination.

[0147] The shortening of the traverse width can be performed symmetrically with the equal shortening distance on one side and the other side in the traverse direction, or can be performed asymmetrically.

[0148] It is also considered that the position of the yarn end of the spun yarn 5 on the package 7 side in the state where the rotation of the package 7 is stopped is constantly shifted in the circumferential direction of the package 7 with respect to the position of the leading end 89 when the suction nozzle 84 is brought close to the take-up device 25 side. In this case, the take-up device 25 can slightly rotate the package 7 to adjust the position of the yarn end. Figure 4

[0149] A delivery roller which delivers the spun yarn 5 while sandwiching the spun yarn 5 can be provided between the spinning device 22 and the yarn storage roller 51.

[0150] The spinning machine 1 can not be provided with the joining trolley 80, and each spinning unit 2 can be provided with the joining device 82, the suction pipe 83, and the suction nozzle 84. The spinning machine 1 can be a free end spinning machine.​

Claims

1. A spinning machine characterized by comprising a plurality of spinning units, each of the spinning units is provided with: a spinning device that generates a yarn by spinning a fiber bundle and supplies the yarn; a take-up device that takes up the yarn supplied from the spinning device while traversing the yarn to form a package; and a yarn storage device that is disposed in a yarn travel path formed between the spinning device and the take-up device, the yarn storage device is provided with: a yarn storage roller that winds and stores the yarn on an outer periphery; and a yarn hanging member that is configured to be rotatable and applies tension to the yarn unwound from the yarn storage roller by hooking the yarn, the take-up device of each of the spinning units is provided with: a package rotation device that is independently driven for each spinning unit to rotate the package; and a traversing device that is independently driven for each spinning unit to traverse the yarn wound on the package, in a take-up interruption operation in which the take-up of the package is controlled to stop while the spinning of the spinning device is stopped, the yarn is connected between the yarn storage roller and the package, the yarn is applied with tension by the yarn hanging member in this state, and the yarn is traversed at a traverse width that is shorter than before the start of the take-up interruption operation by the traversing device; the traversing device starts the reduction of the traverse width at a timing at which the amount of yarn stored in the yarn storage roller becomes equal to or less than a predetermined amount after the spinning of the spinning device is stopped in the take-up interruption operation.

2. The spinning machine according to claim 1, characterized in that the reduced traverse width is equal to or less than 1 / 2 of a maximum traverse width set in a take-up operation at the time of spinning.

3. The spinning machine according to claim 1, characterized in that the reduced traverse width is equal to or less than 10 mm.

4. The spinning machine according to claim 2, characterized in that the reduced traverse width is equal to or less than 10 mm.

5. The spinning machine according to claim 1, characterized in that the spinning machine is provided with a yarn storage amount sensor that detects the amount of yarn stored in the yarn storage roller.

6. The spinning machine according to any one of claims 1 to 5, characterized in that in the take-up interruption operation, the reduction of the traverse width is performed together with a deceleration of the rotation speed of the package.

7. The spinning machine according to claim 6, characterized in that in the take-up interruption operation, the traversing speed of the traversing device is decelerated in conjunction with the deceleration of the rotation speed of the package.

8. The spinning machine according to any one of claims 1 to 5, characterized in that in the take-up interruption operation, the take-up device stops the rotation of the package so that a yarn end of the yarn on the package side is positioned on the surface of the package.

9. The spinning machine according to any one of claims 1 to 5, characterized in that the spinning machine is provided with: a joint device that performs the joint of the yarn on the spinning device side and the yarn on the package side when the yarn is broken between the spinning device and the take-up device; and a ​ A capture guide that captures the yarn on the package side and guides the yarn to the joint device when the yarn is broken between the spinning device and the winding device, The winding device has a creel that holds a bobbin for winding the yarn into a package, The width of the front end of the capture guide is smaller than the width of the creel in the traverse direction of the traverse device.

10. The spinning machine according to claim 9, wherein The width of the front end of the capture guide is 1 / 2 or less of the width of the creel.

11. The spinning machine according to claim 9, wherein The spinning machine has a capture device that is provided with respect to the yarn travel path and captures the yarn on the package side when the yarn is broken between the spinning device and the winding device, The capture device captures the yarn on the downstream side in the yarn travel direction from the yarn storage device and on the upstream side in the yarn travel direction from the winding device.

12. The spinning machine according to claim 11, wherein In the winding interruption operation, it is determined whether the yarn on the package side can be captured by the capture device, and in the case where the yarn on the package side cannot be captured by the capture device, the yarn on the package side is captured by the capture guide, The shortening of the traverse width is started before it is determined whether the yarn on the package side can be captured by the capture device.

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