JP2022085989A - Spinning machine - Google Patents

Abstract

To provide a spinning machine that can adequately process a thread on a package side with a simple configuration when the thread is divided on upstream side in a thread traveling direction on a thread storage device in the thread traveling direction.SOLUTION: A spinning machine has a thread feeding device 23, a winding device 21, a thread storage device 17, a detection device 81, and a capture device 83. The thread storage device 17 has a thread storage roller 41 that winds and stores a spun thread 7 from the thread feeding device 23. The detection device 81 is disposed on downstream side in a thread traveling direction with respect to the thread storage roller 41 and detects a thread end 7t of the spun thread 7 on a package 9 side when the spun thread 7 is divided on upstream side in the thread traveling direction of the thread storage device 17. The capture device 83 captures the thread end 7t of the spun thread 7 on the package 9 side on downstream side of the thread storage device 17. Based on the detection result of the detection device 81, winding of the spun thread 7 on the package 9 side stops at a position at which the thread end 7t of the spun thread 7 on the package 9 side can be captured by the capture device 83.SELECTED DRAWING: Figure 1

Description

The present invention relates to a spinning machine.

Conventionally, a spinning machine including a yarn feeding device, a winding device, and a yarn storage device has been known. Patent Documents 1 and 2, respectively, disclose this type of spinning machine.

The spinning machine of Patent Document 1 includes a draft device and an air spinning device (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 installed on the downstream side of the spinning device (a part of the yarn feeding device) in the yarn traveling direction, and the spun yarn can be temporarily stored by winding the spun yarn around the outer peripheral surface and rotating it. .. This spinning machine includes a travel detection sensor arranged on the downstream side of the yarn storage roller in the yarn travel direction. The travel detection sensor can detect at least one of whether the spun yarn is traveling on the yarn path or stopped traveling on the downstream side of the yarn storage roller.

The spinning machine of Patent Document 2 includes a draft device, an air spinning device (yarn feeding device), a winding device for generating a package, and a yarn storage device. The yarn storage roller included in the yarn storage device can be temporarily stored by winding the yarn sent from the air spinning device (a part of the yarn feeding device). This spinning machine includes a first suction device arranged on the downstream side of the yarn storage roller in the yarn traveling direction. The first suction device removes the split yarn remaining in the yarn storage roller when the yarn is split between the yarn storage device and the take-up device (on the downstream side in the yarn travel direction from the yarn storage device) in the yarn travel direction. In order to remove it, the downstream end of the split yarn is sucked.

Japanese Unexamined Patent Publication No. 2013-067891 Japanese Unexamined Patent Publication No. 2019-108629

In the configurations of Patent Documents 1 and 2, when the yarn is broken on the upstream side in the yarn traveling direction from the yarn storage device, a part of the yarn on the winding device side can be wound on the package by the winding device. However, according to this configuration, the yarn on the winding device side (thread on the package side) may not be properly processed. For example, if the thread end of the thread on the package side is completely wound around the package, the thread end may not be properly pulled out from the package.

An object of the present invention is to provide a spinning machine capable of appropriately processing yarn on the package side with a simple configuration when yarn breakage occurs on the upstream side of the yarn storage device in the yarn traveling direction. To do.

Means and effects to solve problems

From the viewpoint of the present invention, a spinning machine having the following configuration is provided. That is, this spinning machine includes a yarn feeding device, a winding device, a yarn storage device, a detection device, and a catching device. The yarn feeder can supply yarn. The take-up device winds the yarn supplied from the yarn feeder to form a package. The yarn storage device is arranged in the middle of a yarn traveling path formed between the yarn feeding device and the winding device. The detection device detects the yarn end of the yarn on the package side when the yarn is split on the upstream side in the yarn traveling direction with respect to the yarn storage device. The catching device catches the yarn end of the yarn on the package side on the downstream side of the yarn storage device. The yarn storage device has a thread storage roller that winds up and stores threads from the thread feeding device. The detection device is located on the downstream side in the thread traveling direction with respect to the thread storage roller, the end portion on the downstream side in the thread traveling direction with respect to the outer peripheral surface of the thread storage roller, and the end portion on the downstream side in the thread traveling direction with respect to the axial center portion of the thread storage roller. When a suction port capable of sucking the thread to be unwound from the thread storage roller is provided, it is provided in the vicinity of the suction port. Based on the detection result of the detection device, the winding of the yarn on the package side is stopped so that the yarn end of the yarn on the package side is stopped at a position where the yarn on the package side can be captured by the capture device.

As a result, by detecting the position of the thread end of the thread on the package side by the detection device, the rotation of the package can be easily stopped in a state where the thread end of the thread on the package side can be captured by the capture device. Therefore, when the yarn is split on the upstream side in the yarn traveling direction of the yarn storage device, the yarn on the package side can be processed with a simple configuration.

In the spinning machine, the detection device is preferably a sensor arranged on the downstream side in the yarn traveling direction with respect to the yarn storage roller.

As a result, it is possible to detect that the yarn end of the yarn on the package side has reached the downstream side of the yarn storage roller.

In the spinning machine, the sensor is preferably a reflective sensor.

As a result, the thread end of the thread on the package side can be easily detected.

In the spinning machine, it is preferable that the capturing device includes air soccer that generates a suction flow by supplying compressed air.

As a result, the yarn can be strongly sucked in the capture device by the air flow generated by injecting air. Therefore, when the package is reversed due to the unwinding of the thread from the package, it is possible to prevent the reverse winding in which the thread on the package side is wound in the direction opposite to the original direction with respect to the package.

The spinning machine may have the following configuration. That is, the detection device is a sensor facing the end portion on the downstream side in the yarn traveling direction from the axial central portion of the yarn storage roller. The spinning machine regulates the yarn path of the yarn unwound from the yarn storage roller included in the yarn traveling path at a timing before the sensor detects the yarn end of the yarn on the package side. Further regulatory measures will be provided.

In this case, the thread end can be detected by the sensor while the thread traveling path of the thread on the package side is stabilized. Therefore, the thread end of the thread on the package side can be reliably detected.

In the spinning machine, the detection device can also be configured as a line sensor.

In this case, the thread end of the thread on the package side can be reliably detected.

The spinning machine preferably has the following configuration. That is, the spinning machine includes a first injection device. The first injection device is arranged on the side opposite to the capture device with a part of the thread traveling path interposed therebetween, and injects air into the capture device.

As a result, the air injected from the first injection device can guide the thread end of the thread on the package side toward the capture device. Therefore, the thread end can be reliably captured by the capture device.

The spinning machine preferably has the following configuration. That is, the spinning machine includes a guide member. The guide member is arranged on the downstream side of the yarn storage roller and guides the yarn to be wound on the package. The detection device is arranged on the downstream side of the guide member.

As a result, the thread traveling path is stabilized by the guide member, and when the thread is broken, the thread end of the thread on the package side is separated from the thread traveling path, so that the thread end is reliably detected by the detection device. Can be detected.

The spinning machine preferably has the following configuration. That is, this spinning machine is equipped with a yarn splicing device. The thread splicing device performs a thread splicing process for splicing a thread on the thread feeding device side and a thread on the package side when the thread is divided on the upstream side in the thread traveling direction from the thread storage device. The detection device is arranged between the guide member and the thread splicing device in the thread traveling direction.

As a result, the yarn end of the yarn on the package side can be satisfactorily detected by the detection device at a position suitable for the yarn splicing operation by the yarn splicing device in the yarn traveling direction.

The spinning machine preferably has the following configuration. That is, this spinning machine includes a second injection device. The second injection device injects air so as to guide the thread end of the thread on the package side toward the capture device when the thread is broken on the downstream side in the thread traveling direction from the thread storage device. do.

As a result, even if the thread end of the thread on the package side is located on the downstream side of the capture device, the thread on the package side can be pulled out from the package and captured by the capture device.

The spinning machine preferably has the following configuration. That is, this spinning machine includes a yarn monitoring device capable of detecting yarn defects contained in the yarn supplied from the yarn feeder. When the yarn monitoring device detects a yarn defect, the yarn is split on the upstream side in the yarn traveling direction with respect to the yarn storage device. The take-up device reverses the take-up direction of the package so that the take-up device catches the yarn of the length required for removing the yarn defect among the yarns on the package side. Rotate in the direction.

As a result, the yarn defect detected by the yarn monitoring device can be reliably removed by the capture device.

The side view which shows the structure of the spinning unit provided in the spinning machine which concerns on one Embodiment of this invention. Control block diagram of the spinning unit. The figure which shows the positional relationship between a thread storage roller and a suction device in a thread storage device. The figure which shows the rotation state of a package and a thread storage roller. The perspective view explaining the detection device and the capture device.

A spinning machine according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. In the following description, "upstream" and "downstream" mean upstream and downstream in the traveling direction (thread traveling direction) of the yarn (specifically, the sliver 3, the fiber bundle 5, and the spun yarn 7), respectively. ..

The spinning machine includes at least one spinning unit 1 and a machine stand control device (not shown). The machine stand controller manages one or more spinning units 1. The spinning unit 1 sends the fiber bundle 5 to the downstream side in the yarn traveling direction by the draft device 11, and the fiber bundle 5 sent from the draft device 11 is spun by the spinning device 13 to generate the spun yarn 7, and the spun yarn is produced. 7 is wound by the winding device 21 to form the package 9. Although the cylindrical package 9 is shown in FIG. 5, the spinning machine may be configured such that the spinning yarn 7 is wound around the conical package 9.

As shown in FIG. 1, one spinning unit 1 includes a draft device 11, a spinning device 13, a thread monitoring device 15, a thread storage device 17, a thread splicing device 19, and a winding device 21. .. The draft device 11, the spinning device 13, the thread monitoring device 15, the thread storage device 17, the thread splicing device 19, and the winding device 21 are arranged in order from the upstream side to the downstream side in the thread traveling direction.

As shown in FIG. 2, the above-mentioned device and the like included in the spinning unit 1 are controlled by the unit controller (control device) 25 provided in the spinning unit 1. At least one of the plurality of devices included in the spinning unit 1 may be controlled by the machine base control device. Further, one unit controller may be provided for each of a predetermined number of spinning units 1.

The draft device 11 generates the fiber bundle 5 by stretching (drafting) the sliver 3 supplied from Kens or the like in the figure. The draft device 11 rotates the draft roller in the draft direction while sandwiching the sliver 3 between the plurality of draft rollers and the plurality of opposing rollers facing them, and conveys the sliver 3 to the downstream side. , Stretching to a predetermined fiber amount (or thickness) to generate a fiber bundle 5.

The draft device 11 includes a back roller 31, a third roller 33, a middle roller 35, and a front roller 37 as a plurality of draft rollers. These rollers 31, 33, 35, and 37 are arranged in order from the upstream side to the downstream side. A rubber apron belt 39 is wrapped around the middle roller 35. Each draft roller is rotationally driven at a predetermined rotational speed.

A spinning device 13 is provided on the downstream side of the front roller 37 of the draft device 11. The spinning device 13 twists the fiber bundle 5 supplied from the draft device 11 to generate a spun yarn (yarn) 7. In the present embodiment, as the spinning device 13, a pneumatic spinning device that twists the fiber bundle 5 by using a swirling air flow is adopted.

In the spinning unit 1 (spinning machine), the draft device 11 and the spinning device 13 constitute a yarn feeding device 23 capable of supplying the spun yarn 7. The spun yarn 7 generated by the yarn feeder 23 runs from the yarn feeder 23 toward the winding device 21. A yarn path (thread traveling path) on which the spun yarn 7 travels is formed between the yarn feeding device 23 and the winding device 21.

A yarn monitoring device 15 is provided on the downstream side of the spinning device 13. The yarn monitoring device 15 monitors the presence / absence and quality (thickness and / or presence / absence of foreign matter, etc.) of the spun yarn 7. In the thread monitoring device 15, non-contact monitoring is performed by a transmissive optical sensor. When the yarn monitoring device 15 detects a yarn defect of the spun yarn 7 (for example, a portion having an abnormality in the thickness of the spun yarn 7), the yarn monitoring device 15 transmits a yarn defect detection signal to the unit controller 25.

When the unit controller 25 receives the yarn defect detection signal, the unit controller 25 cuts the spun yarn 7 by stopping the spinning in the spinning apparatus 13. When the spinning in the spinning device 13 is stopped, the unit controller 25 stops the draft operation by the draft device 11 and also stops the winding operation by the winding device 21 and the drawing operation by the yarn storage device 17.

The yarn monitoring device 15 is not limited to the transmission type optical sensor, and for example, a capacitance type sensor may be used to monitor the presence / absence and quality of the spun yarn 7. Instead of the configuration in which spinning is stopped and the spun yarn 7 is cut, a configuration in which the spun yarn 7 is cut by a cutting device provided in the vicinity of the yarn monitoring device 15 may be adopted.

A yarn storage device 17 is provided on the downstream side of the yarn monitoring device 15 (that is, on the downstream side of the spinning device 13). The yarn storage device 17 is arranged in the middle of a thread path (thread traveling path) formed between the thread feeding device 23 and the winding device 21. The thread storage device 17 includes a thread storage roller 41, a thread storage motor 43, a fryer (thread hooking member) 45, a thread detection sensor 47, a suction device (thread action unit) 49, and a thread removal lever (thread removal member). ) 51 is provided.

The yarn storage roller 41 can wind and store the spun yarn 7 supplied from the yarn feeder 23. The spun yarn 7 is stored in a state of being wound around the outer peripheral surface of the yarn storage roller 41. The yarn storage roller 41 is rotated forward or reverse by the thread storage motor 43. In the present embodiment, since the known delivery roller pair is not provided between the spinning device 13 and the yarn storage device 17, the thread storage device 17 carries out a drawing operation of pulling out the spun yarn 7 from the spinning device 13.

The yarn storage motor 43 is configured as an electric motor capable of forward and reverse rotation. The yarn storage motor 43 rotates in the normal direction to rotate the thread storage roller 41 in the normal direction. The thread storage motor 43 reverses the thread storage roller 41 by reversing. The yarn storage motor 43 rotates the yarn storage roller 41 in the normal direction so that the drawing operation is performed during normal spinning in the spinning unit 1.

The fryer 45 is attached to the downstream end (tip) of the yarn storage roller 41. The fryer 45 is provided so as to be in contact with the spun yarn 7 drawn from the yarn storage roller 41. The fryer 45 is supported so as to be rotatable relative to the yarn storage roller 41. A permanent magnet is attached to either the fryer 45 or the thread storage roller 41, and a magnetic hysteresis material is attached to the other. By these magnetic means, a torque is generated to resist the relative rotation of the fryer 45 with respect to the yarn storage roller 41. Therefore, only when a force for overcoming the above torque is applied to the fryer 45 in a state where the spun yarn 7 is applied to the fryer 45 (that is, when a tension equal to or higher than a predetermined value is applied to the spun yarn 7). The fryer 45 rotates relative to the yarn storage roller 41 and can unwind the spun yarn 7 wound around the yarn storage roller 41. On the other hand, when the force for overcoming this torque is not applied to the fryer 45, the yarn storage roller 41 and the fryer 45 rotate integrally, and the spun yarn 7 is stored in the yarn storage roller 41.

In this way, the yarn storage device 17 unwinds the spun yarn 7 when the tension of the spun yarn 7 on the downstream side increases, and the tension of the spun yarn 7 on the downstream side decreases (the spun yarn 7 is about to loosen). It operates to stop the unwinding of the spun yarn 7. As a result, the yarn storage device 17 can eliminate the slack in the spun yarn 7 and apply an appropriate tension to the spun yarn 7. Further, as described above, the fryer 45 operates so as to absorb the fluctuation of the tension applied to the spinning yarn 7 between the yarn storage device 17 and the winding device 21, so that the fluctuation of the tension is transmitted from the spinning device 13. It is possible to prevent the spun yarn 7 up to the yarn storage device 17 from being affected.

The yarn storage device 17 may include an electromagnet instead of a permanent magnet instead of such a magnetic means. Alternatively, the yarn storage device 17 may include a motor for rotationally driving the fryer 45 without providing magnetic means.

The thread detection sensor 47 is a sensor that detects the amount of thread stored in the thread storage roller 41. The yarn detection sensor 47 is provided so as to be able to detect the spun yarn 7 at a predetermined position of the yarn storage roller 41, and by detecting the presence or absence of the spun yarn 7 at the predetermined position, the yarn storage amount is equal to or more than the predetermined amount. It is possible to detect whether or not it is. When the spun yarn 7 is wound around the package 9, the unit controller 25 controls the rotation speed of the winding drum 63 of the winding device 21 according to the detection result of the yarn detection sensor 47, and the yarn storage roller 41. Adjust so that the amount of yarn stored in the yarn is within the specified range (value).

The suction device 49 is arranged on the side of the thread storage roller 41 in a direction intersecting the axial direction of the thread storage roller 41. The suction device 49 includes a hollow pipe 73. The suction device 49 is connected to a suction source (not shown) as a negative pressure source, and can generate a suction air flow in the pipe 73. The suction device 49 is provided around the yarn storage roller 41 when the spun yarn 7 is split (between the yarn feeder 23 and the yarn storage device 17) on the upstream side of the yarn storage device 17 in the yarn traveling direction. Generates a suction air flow. As a result, the suction device 49 can suck and capture the portion of the spun yarn 7 on the package 9 side on the upstream side of the yarn storage roller 41.

The thread removing lever 51 is arranged in the vicinity of the thread storage roller 41. The thread removing lever 51 can perform a thread removing operation for removing the spun yarn 7 (yarn traveling path) from the fryer 45. The thread removing lever 51 is movably provided so as to be able to move between the standby position and the thread removing position. FIG. 1 shows a state in which the thread removing lever 51 is in the standby position, and an arrow indicates a moving direction when the thread removing lever 51 moves from the standby position to the thread removing position. The thread removing lever 51 passes through the space on the downstream side of the thread storage roller 41 in the process of moving from the standby position to the thread removing position. At this time, if there is a spun yarn 7 caught in the fryer 45, the yarn removing lever 51 acts on the spun yarn 7 and the spun yarn 7 is disengaged from the fryer 45.

In the present embodiment, the thread removing lever 51 is configured to be a single weight drive type. That is, the thread removing lever 51 is provided in each spinning unit 1, and a single driving unit (motor, air cylinder, etc.) is provided for each thread removing lever 51. Therefore, the thread removing lever 51 can operate independently of the thread removing lever 51 of the other spinning unit 1.

A guide (guide member) 55 for guiding the spun yarn 7 wound around the package 9 is provided on the downstream side of the yarn storage roller 41. 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 formed on a plate-shaped member fixedly provided to the spinning unit 1 or a round portion in which a part thereof is cut off.

A thread splicing device 19 is provided on the downstream side of the guide 55 (that is, on the downstream side of the thread storage device 17). In the yarn splicing device 19, when the spun yarn 7 is split between the yarn feeder 23 and the winding device 21 in the yarn traveling direction, the spun yarn 7 from the yarn feeder 23 and the spun yarn from the package 9 are spun. 7 and the thread splicing process to splice are performed. In the present embodiment, the yarn splicing device 19 is a splicer device that twists yarn ends together by a swirling air flow generated by air. As the thread splicing device 19, for example, a mechanical notter or the like can be adopted instead of the splicer device.

The spinning unit 1 is provided with a guide device 57. The guide device 57 guides the spun yarn 7 from the yarn feeder 23 to the yarn splicing device 19 when the spun yarn 7 is divided on the upstream side of the yarn storage device 17. The guide device 57 is rotatably supported at one end in the longitudinal direction thereof, and can be rotated 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 can generate a suction air flow at the suction port 59 provided at the other end in the longitudinal direction thereof. By rotating the guide device 57 downward, the yarn end of the spun yarn 7 from the yarn feeder 23 can be captured by the suction port 59. The guide device 57 can guide the yarn end to the yarn joint device 19 by catching the yarn end of the spun yarn 7 from the yarn feeder 23 and then rotating upward.

The guide device 57 guides the yarn end of the spun yarn 7 from the yarn feeder 23 to the yarn splicing device 19. As will be described later, the spun yarn 7 from the package 9 is captured by the trapping device 83 and guided to the yarn splicing device 19. In this state, by driving the yarn splicing device 19, the yarn splicing process is performed so that the spun yarn 7 from the yarn feeder 23 and the spun yarn 7 from the package 9 are connected. As a result, even when the spun yarn 7 is divided on the upstream side of the yarn storage device 17, the spinning unit 1 restarts the stopped spinning to perform the yarn splicing process, and the yarn feeding device 23 is used to perform the yarn splicing process. The spun yarn 7 can be rewound into the package 9.

A take-up device 21 is provided on the downstream side of the thread storage device 17 (downstream side of the thread splicing device 19 in this embodiment). The take-up device 21 winds the spun yarn 7 supplied from the yarn feeder 23 to form the package 9. In the present embodiment, the take-up device 21 is provided at a position higher than the upstream end of the draft device 11 in the height direction of the spinning unit 1. As described above, the spinning unit 1 has a layout in which the yarn path extends from the bottom to the top. The take-up device 21 includes a cradle arm 61 and a take-up drum 63.

The cradle arm 61 can rotatably support the take-up pipe 67 for winding the spun yarn 7. The cradle arm 61 is rotatable around its root portion. As a result, in the winding device 21, even if the diameter of the package 9 becomes large due to the spinning yarn 7 being wound around the winding pipe 67, the winding of the spinning yarn 7 can be appropriately continued.

The take-up drum 63 rotates in a state where the take-up drum drive motor (not shown) is controlled by the unit controller 25 and is in contact with the outer peripheral surface of the take-up pipe 67 or the package 9. A twill groove (not shown) is formed on the outer peripheral surface of the take-up drum 63, and the spun yarn 7 can be traversed with a predetermined width by the twill groove. As a result, the take-up device 21 can take up the spun yarn 7 around the take-up pipe 67 while traversing it to form the package 9.

In the present embodiment, the winding device 21 is configured as a single weight drive type. That is, the take-up device 21 provided in each spinning unit 1 has a single drive unit (wind-up drum drive motor), and is configured to rotate the take-up drum 63 and thus the package 9. .. The take-up device 21 can independently change the rotational operation of the package 9 with respect to the take-up device 21 of the other spinning unit 1.

Next, with reference to FIGS. 3 and 4, the processing of the spun yarn 7 on the package 9 side, which is performed when the spun yarn 7 is divided between the yarn feeder 23 and the yarn storage device 17, will be described. ..

When spinning by the spinning unit 1 is normally performed, the package 9 in the take-up device 21 and the yarn storage roller 41 of the yarn storage device 17 rotate in predetermined directions, respectively. In the following description, the direction in which the package 9 rotates at this time is defined as the normal rotation direction, and the package 9 may rotate in the normal direction. Further, at this time, the direction in which the thread storage roller 41 rotates is set as the normal rotation direction, and the thread storage roller 41 may rotate in the normal direction.

In the spinning unit 1, when the spinning yarn 7 is supplied from the yarn feeding device 23 and the package 9 is rotating in the normal direction, the spinning yarn 7 may be cut according to the monitoring result of the yarn monitoring device 15 as described above. be. In this case, the spun yarn 7 is divided between the yarn feeding device 23 and the yarn storage device 17 in the yarn traveling direction. Then, in the present embodiment, the supply operation of the yarn feeding device 23, the drawing operation of the yarn storage device 17, and the winding operation of the winding device 21 are immediately stopped.

When such a split of the spun yarn 7 occurs, as shown by a chain line in FIG. 1, the yarn end 7t of the spun yarn 7 on the package 9 side is located between the yarn feeder 23 and the yarn storage device 17. .. In the present embodiment, the yarn end 7t is captured in advance by the suction device 49 of the yarn storage device 17 (see reference numeral 7c in FIG. 3), and in this state, the winding operation by the winding device 21 is performed on the spinning yarn 7. By performing the operation at a slower speed than before the splitting, the spun yarn 7 remaining in the yarn storage roller 41 is unwound from the yarn storage roller 41 to the winding device 21 side. The operation of the suction device 49 at this time will be described later.

The unwinding of the spun yarn 7 from the yarn storage roller 41 proceeds, and eventually the unwinding of the spun yarn 7 from the yarn storage roller 41 is completed. When all the spun yarn 7 is unwound from the yarn storage roller 41, its end is separated from the yarn storage roller 41 and immediately after that, it is captured by the capture device 83, and the change in the yarn path accompanying this is detected by the detection device 81. Will be done. The details of the capture device 83 and the detection device 81 will be described later.

When the detection device 81 stops detecting the spun yarn 7, the unit controller 25 stops the forward rotation of the package 9 by the take-up device 21. As a result, the yarn end 7t of the spun yarn 7 on the package 9 side can be positioned on the downstream side of the yarn storage device 17 and on the upstream side of the winding device 21.

As a result, when the spun yarn 7 is split 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 configuration. In the present embodiment, the yarn defect contained in the spun yarn 7 on the package 9 side can be removed from the spun yarn 7 by the trapping device 83. The position of the yarn end 7t of the spun yarn 7 on the package 9 side 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.

Next, the suction device 49 will be described in detail. When the spun yarn 7 is split between the yarn storage device 17 and the yarn feeder 23, the supply operation of the yarn feeder 23, the withdrawal operation of the yarn storage device 17, and the winding operation of the take-up device 21 are immediately performed. Stop. Therefore, the spun yarn 7 on the package 9 side is connected between the package 9 and the yarn storage device 17 in a state where the yarn end 7t of the spun yarn 7 on the package 9 side is arranged on the upstream side of the yarn storage roller 41. Stop in the state. Subsequently, the normal rotation of the package 9 by the take-up device 21 is restarted at a lower speed than before the split, and the spun yarn 7 is unwound from the yarn storage roller 41 to the downstream side. In the process of this unwinding operation, the thread end 7t on the upstream side of the thread storage roller 41 is sucked and captured by the suction device 49.

Specifically, the unit controller 25 generates a suction air flow in the suction device 49, and causes the suction device 49 to suck and capture the thread end 7t located on the upstream side of the thread storage roller 41 from the suction port 71. As a result, the spun yarn 7 does not change the path of the spun yarn 7 immediately upstream of the yarn storage roller 41 until all the spun yarn 7 remaining in the yarn storage roller 41 is unwound to the downstream side. Will be guided. In other words, the suction device 49 limits the behavior so that the yarn end 7t of the spun yarn 7 is not in a free state, and holds the position of the spun yarn 7.

As shown in FIG. 3, the suction device 49 includes a pipe 73. The pipe 73 has a suction port 71 at one end in the longitudinal direction and is connected to the suction source 75 at the other end in the longitudinal direction. The suction port 71 is directed to the thread storage roller 41. A first valve 77 is provided in the middle of the pipe 73 in the longitudinal direction. The opening and closing of the first valve 77 is controlled by the unit controller 25. By controlling the opening and closing of the first valve 77, the suction air flow can be generated or stopped in the pipe 73 of the suction device 49. When a suction air flow is generated, a suction force acts on the outer peripheral surface of the yarn storage roller 41, and the spun yarn 7 wound around the outer peripheral surface (spun yarn 7 remaining in the yarn storage roller 41) is sucked from the suction port 71. Will be done. The suction source 75 is provided, for example, at the end of the machine base of the spinning machine and is shared by a plurality of spinning units 1.

The suction port 71 is arranged so as to face the thread introduction portion 79 of the thread storage device 17. The yarn introduction portion 79 is a region of the outer peripheral surface of the yarn storage roller 41 located immediately before the spun yarn 7 is substantially started to be wound.

The thread 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 around the storage portion 41a. In FIG. 3, the storage portion 41a is shown in a cylindrical shape having a constant outer diameter, but may be configured to have a tapered shape in which the outer diameter gradually or linearly decreases toward the downstream side. .. As the package 9 rotates in the normal direction and winds up 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 spiral axis around which the spun yarn 7 is wound. A tapered portion 41b is formed on the yarn storage roller 41 at the end corresponding to the upstream side of the spiral among both ends of the shaft of the thread storage roller 41. The tapered portion 41b corresponds to the thread introduction portion 79.

Hereinafter, the axial upstream side of the thread storage roller 41 means the upstream side of the spiral in the axial direction, and the axial downstream side means the downstream side of the spiral in the axial direction.

The tapered portion 41b is formed in a substantially conical shape having a diameter larger than that of the storage portion 41a. The diameter of the tapered portion 41b becomes smaller as it approaches the storage portion 41a, and becomes equal to the diameter of the storage portion 41a at the portion connected to the storage portion 41a.

The yarn introduction portion 79 is arranged on the axially upstream side (lower in FIG. 3) of the yarn storage roller 41 with respect to the most upstream portion 80 in which the spun yarn 7 is wound while being aligned in the storage portion 41a. The spun yarn 7 from the upstream side in the yarn traveling direction is tensioned by the rotation of the yarn storage roller 41, and is guided by contacting the yarn introduction portion 79 (tapered portion 41b) as necessary, while the most upstream portion 80. Is guided by.

By rotating the yarn storage roller 41 while guiding the spun yarn 7 to a certain place, the spun yarn 7 wound in advance in the storage portion 41a is pushed by the spun yarn 7 to be wound subsequently, and is downstream in the axial direction. Move to the side little by little. As a result, the spun yarns 7 can be stored in the storage unit 41a in an orderly arrangement.

With reference to the timing chart of FIG. 4, the rotation control of the yarn storage roller 41 and the package 9 when the spun yarn 7 is split on the upstream side of the yarn storage roller 41 will be specifically described. When the split of the spun yarn 7 occurs, the unit controller 25 stops the normal rotation of the package 9 and the normal rotation of the yarn storage roller 41 at the timing t1. Specifically, the unit controller 25 stops the drive of the take-up drum drive motor and the drive of the yarn storage motor 43. The yarn end 7t of the spun yarn 7 on the package 9 side is taken up by the yarn storage roller 41 by the normal rotation of the yarn storage roller 41 before stopping at the timing t1. At the time of timing t1, the yarn end 7t of the spun yarn 7 on the package 9 side is located near the most upstream portion 80.

After that, the unit controller 25 starts the reversal of the thread storage roller 41 at the timing t2 while maintaining the state in which the rotation of the package 9 is stopped. The reversal of the thread storage roller 41 is continued until the timing t3.

By reversing the yarn storage roller 41, the yarn end 7t of the spun yarn 7 on the package 9 side is sucked into 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 so as to face the thread introduction portion 79. Therefore, in the process of reversing the thread storage roller 41, the thread end 7t located near the most upstream portion 80 is likely to be sucked into the suction port 71. In FIG. 3, the thread end 7t in a state of being sucked into the suction device 49 is indicated by reference numeral 7c.

The unit controller 25 stops the reversal at the timing t3 in which the thread storage roller 41 is reversed by a predetermined rotation amount.

The yarn storage roller 41 starts normal rotation at the same timing t3 as the stop of reverse rotation. The forward rotation of the yarn storage roller 41 is continued until the timing t4. The normal rotation may be started after a predetermined time has elapsed after the reverse rotation is stopped.

By the normal rotation of the yarn storage roller 41 from the timing t3 to the timing t4, a part of the spun yarn 7 once sucked into the suction device 49 is pulled 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 from the suction device 49 naturally reaches the most upstream portion from the yarn introduction portion 79 as the yarn storage roller 41 rotates forward. Guided to 80. Therefore, the spun yarn 7 can be well aligned in the reservoir 41a.

From timing t3 to timing t4, the yarn storage roller 41 rotates slightly forward. Specifically, the amount of forward rotation is smaller than the amount of reversal of the yarn storage roller 41 after the spun yarn 7 is divided. Therefore, at this point, the yarn end 7c of the spun yarn 7 on the package 9 side is not completely pulled out from the suction device 49. In other words, at the time of timing t4, the thread end 7c remains inside the suction device 49. That is, at this point, the thread end 7c does not come out from the suction port 71.

A part of the spun yarn 7 is drawn out from the suction device 49 with the normal rotation of the yarn storage roller 41, and the suction device 49 acts on a suction air flow in a direction opposed to this drawing. Therefore, the suction device 49 also functions as a resistance-imparting unit that imparts a resistance force against the running of the spun yarn 7 in the direction of being wound by the yarn storage roller 41.

After the yarn storage roller 41 stops the normal rotation at the timing t4, the package 9 starts the normal rotation at the timing t5. As a result, since the spun yarn 7 is pulled toward the package 9, the spun yarn 7 is unwound from the yarn storage roller 41 to the downstream side. At this time, since the yarn end 7c on the upstream side is sucked into the suction device 49, the yarn end 7c is prevented from being entangled with the spun yarn 7 to be unwound. Therefore, the unwinding of the spun yarn 7 from the yarn storage roller 41 is smoothly performed.

In the process of normal rotation of the package 9, the yarn end 7c starts to be pulled out from the suction device 49 almost at the same time when all the spun yarns 7 are unwound from the yarn storage roller 41. Eventually, the yarn end 7c of the spun yarn 7 on the package 9 side comes out of the suction device 49 and moves to the downstream side of the yarn storage device 17.

Hereinafter, the significance of controlling the reversal and normal rotation of the yarn storage roller 41 as shown in timings t2 to t4 will be described.

The spun yarn 7 is produced by twisting with a spinning device 13. Therefore, when the spun yarn 7 is divided, the portion near the yarn end 7t tends to be deformed in a certain direction due to the influence of the twisting torque.

At the time of timing t1, the thread end 7t is in a free state in the vicinity of the above-mentioned most upstream portion 80, as shown by reference numeral 7a in FIG. The free yarn end 7a is likely to come into contact with the spun yarn 7 remaining wound around the reservoir 41a as indicated by reference numeral 7b due to the influence of the above torque.

If the spun yarn 7 wound around the yarn storage roller 41 is entangled with the yarn end 7t in the state indicated by the reference numeral 7b, it causes tension fluctuation and / or yarn breakage. Alternatively, sluffing may occur in which the spun yarn 7 on the yarn storage roller 41 is entangled and becomes a lump and comes off at once, and an error in unwinding the spun yarn 7 from the yarn storage roller 41 may occur.

As one method of preventing the yarn end 7a from being entangled with the spun yarn 7 wound around the yarn storage roller 41, it is conceivable to swing the yarn end 7a by centrifugal force. For this purpose, the yarn storage roller 41 may be rotated forward at a certain speed in the process of pulling the spun yarn 7 downstream from the yarn storage roller 41 and unwinding. However, when the yarn storage roller 41 is rotated when the spun yarn 7 from the yarn storage roller 41 is unwound to the downstream side, the twist strength of the spun yarn 7 is strong between the yarn storage roller 41 and the winding device 21. In addition, unintended changes will occur.

In this respect, in the present embodiment, first, the thread storage roller 41 is reversed so that the free thread end 7a is captured by the suction device 49. As a result, the yarn end 7a is separated from the yarn storage roller 41 as indicated by the reference numeral 7c. After that, the yarn storage roller 41 is slightly rotated forward while continuing the suction of the spun yarn 7 by the suction device 49. As a result, the slack of the spun yarn 7 between the suction device 49 and the yarn storage roller 41 is eliminated, and the spun yarn 7 is guided from the suction port 71 to the most upstream portion 80 via the yarn introduction portion 79. Become. Further, the normal rotation of the yarn storage roller 41 exerts a winding action of the spun yarn 7 on the outer peripheral surface of the yarn storage roller 41.

As described above, the spun yarn 7 wound around the yarn storage roller 41 is regularly aligned in the storage unit 41a. Therefore, by rotating the package 9 in the normal direction while the rotation of the yarn storage roller 41 is stopped, the spun yarn 7 can be unwound one by one in a beautiful spiral shape and sent to the downstream side. After the last roll of the spun yarn 7 is unwound from the yarn storage roller 41 (or almost at the same time), the yarn end 7c is removed from the suction port 71 of the suction device 49. Therefore, it is possible to reliably prevent the thread end 7t from being entangled.

Next, the control regarding the operation of the thread removing lever 51 shown in FIG. 1 will be described.

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

The first thread removing operation will be specifically described. The unit controller 25 controls the take-up device 21 so that the rotation of the package 9 is stopped when it is determined that the unwinding of the spun yarn 7 from the yarn storage roller 41 is completed. At substantially the same timing as the rotation of the package 9 is stopped, the unit controller 25 controls the thread storage device 17 so as to move the thread removal lever 51 from the standby position to the thread removal position.

Immediately after the spun yarn 7 wound around the yarn storage roller 41 is completely unwound, the yarn end 7t of the spun yarn 7 on the package 9 side passes near the fryer 45 while being away from the yarn storage roller 41. Pass downstream. In this process, the free thread end 7t or a portion in the vicinity thereof may come into contact with the fryer 45 and become entangled. In the present embodiment, even in this case, the thread end 7t or a portion in the vicinity thereof can be removed from the fryer 45 by performing the above-mentioned first thread removing operation. The movement timing of the thread removing lever 51 is not particularly limited, and may be any timing before the thread splicing is performed by the thread splicing device 19.

It is not always necessary to perform the first thread removing operation. For example, the fryer 45 may be provided with a sensor for detecting that the spun yarn 7 is not entangled, and the first yarn removing operation may be performed only when the sensor detects the entanglement of the spun yarn 7. Alternatively, the first thread removing operation may be omitted. In the present embodiment, the first yarn removal operation is performed at the timing when it is assumed that the spun yarn 7 is completely unwound from the yarn storage roller 41, and the spun yarn 7 is actually unwound from the yarn storage roller 41. It is unknown if it has been done.

The operation stroke (first operation amount) when the thread removing lever 51 performs the first thread removing operation is the operation stroke (second operation) when the thread removing lever 51 performs the second thread removing operation described later in other cases. Amount) is different. In other words, the thread removal position with respect to the fryer 45 is different in both cases.

The other case is, for example, a case where the spun yarn 7 from the yarn feeder 23 is guided to the yarn splicing device 19 by the guide device 57 in a series of yarn splicing operations after the spun yarn 7 is divided. At this time, the spun yarn 7 guided by the guide device 57 is hooked on the rotating fryer 45, and the winding of the spun yarn 7 around the yarn storage roller 41 starts. After a predetermined amount (length) of the spun yarn 7 is wound around the yarn storage roller 41, the unit controller 25 moves the yarn removing lever 51 from the standby position to the yarn removing position. Hereinafter, this thread removing operation may be referred to as a second thread removing operation. As a result, the spun yarn 7 can be removed from the fryer 45, and the spun yarn 7 wound around the yarn storage roller 41 at the start of spinning can be sucked and removed by the guide device 57. After that, when the yarn removing lever 51 returns to the standby position again, the spun yarn 7 is hooked on the fryer 45 and wound around the yarn storage roller 41. After that, the spun yarn 7 and the spun yarn 7 on the package 9 side already prepared by the capture device 83 are spliced by the yarn splicing device 19. Hereinafter, the timing at which the second thread removing operation is performed may be referred to as a second timing. The second timing is different from the first timing described above.

When the fryer 45 is in contact with the vicinity of the free yarn end 7t, the fryer 45 and the spun yarn 7 are more likely to be entangled than when the fryer 45 is in contact with the middle portion of the spun yarn 7. Therefore, in the present embodiment, the first operation amount is set to be larger than the second operation amount. In other words, the thread removing position in the case of the first thread removing operation is a position farther from the fryer 45 than the thread removing position in the case of the second thread removing operation. As a result, even if the thread end 7t is entangled with the fryer 45, the thread end 7t can be reliably removed from the fryer 45 by the thread removing lever 51.

Next, when the spun yarn 7 is split between the yarn feeder 23 and the yarn storage device 17, the spun yarn 7 on the package 9 side is performed after the spun yarn 7 is unwound from the yarn storage roller 41. The processing of the thread end will be described.

As shown in FIG. 5, the spinning unit 1 is provided with a detection device 81 capable of detecting the yarn end 7t of the spinning yarn 7 on the package 9 side. The detection device 81 can detect the yarn end 7t located between the yarn storage device 17 and the winding device 21 after being unwound from the yarn storage roller 41. In the present embodiment, the detection device 81 is a sensor arranged on the downstream side of the yarn storage roller 41 in the yarn traveling direction. The detection device 81 is arranged closer to the yarn storage device 17 than the take-up device 21 in the yarn traveling direction.

The detection device (sensor) 81 is an optical reflection type sensor in the present embodiment. The configuration of the detection device 81 is arbitrary, and for example, the detection device 81 may be a capacitance type proximity sensor or a transmission type sensor.

The detection device 81 is arranged on the downstream side of the guide 55. Specifically, the detection device 81 is arranged between the guide 55 and the thread splicing device 19 in the thread traveling direction. The detection device 81 is arranged in the vicinity of the guide 55. The guide 55 guides the path of the spun yarn 7 in the vicinity of the detection device 81.

When the spun yarn 7 is stretched between the guide 55 and the take-up device 21 in a state where the spun yarn 7 is wound around the yarn storage roller 41, the spun yarn 7 is spun as shown by a chain wire in FIG. It is located along the path (a part of the thread traveling path) 111 of the thread 7. The detection device 81 is arranged so as to face an appropriate position of the path 111 of the spun yarn 7, and detects whether or not the spun yarn 7 is present at the position.

Therefore, when the spun yarn 7 is in a continuous state between the yarn feeding device 23 and the winding device 21, it is located along the path 111 of the spun yarn 7, so that the detection device 81 indicates that the spun yarn 7 is present. To detect. If the yarn end 7t of the spun yarn 7 on the package 9 side is on the downstream side of the detection device 81 after the split of the spun yarn 7 occurs, the detection device 81 does not detect the spun yarn 7.

Even when the yarn end 7t of the spun yarn 7 on the package 9 side is on the upstream side of the detection device 81, if the spun yarn 7 is not wound around the yarn storage roller 41, the spun yarn 7 whose tension cannot be maintained is a path. The detection device 81 does not detect the spun yarn 7 because it deviates from the 111 and is sucked into the capture device 83 described later. In this way, the detection device 81 for detecting whether or not the spun yarn 7 is present in the path 111 of the spun yarn 7 indicates whether or not there is a yarn end 7t between the yarn storage roller 41 and the winding device 21. It is almost the same as detecting.

The detection device 81 may be arranged at a position where the movement of the spun yarn 7 is stable. The detection device 81 may be arranged, for example, at a position facing the thread storage roller 41 and at any position in a region downstream of the axial center portion of the thread storage roller 41, or the suction device 49. It may be arranged in the vicinity of (a position adjacent to the thread storage roller 41 in a direction intersecting the axial direction of the thread storage roller 41). Further, 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 spun yarn 7 completely ends, but refers to this portion and a region in the vicinity thereof. It includes.

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 thread storage device 17 and the winding device 21 in the thread traveling direction. In the present embodiment, as shown in FIG. 1, the catching device 83 is arranged between the thread storage device 17 and the thread splicing device 19 in the thread traveling direction, and is arranged in the vicinity of the detection device 81. The catching device 83 is arranged closer to the yarn storage device 17 than the winding device 21 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 the spun yarn 7 is split on the upstream side in the yarn traveling direction from the yarn storage device 17. When the catching device 83 sucks and catches the yarn end 7t, it is not necessary to first suck the portion where the spun yarn 7 completely ends with respect to the yarn end 7t.

The capture device 83 includes a pipe 85. In the present embodiment, the capture device 83 further includes an air soccer 87 that generates a suction air flow by supplying compressed air.

The pipe 85 has a tubular shape. The pipe 85 is connected to a suction source (not shown) as a negative pressure source. Therefore, the capture device 83 can generate a suction air flow inside the pipe 85. An air soccer 87 is provided at one end of the pipe 85 in the longitudinal direction. The air soccer 87 has a catching opening 89 for sucking the yarn end 7t of the spun yarn 7 on the package 9 side. The catching opening 89 is arranged so as to open toward the yarn path (path 111 of the spun yarn 7 in FIG. 5) formed between the yarn storage device 17 and the take-up device 21. The relative position of the catching opening 89 with respect to the thread path is not particularly limited, and may be any as long as it is on the downstream side of the thread storage roller 41 and in the vicinity of the thread path. In the present embodiment, the capture opening 89 is fixedly provided in the spinning unit 1.

The compressed air generated by the compressed air source 91 is supplied to the air soccer 87. By discharging the compressed air from the injection hole shown in the figure, the air soccer 87 can generate an additional suction air flow in the capturing opening 89 in addition to the suction air flow by the negative pressure source. A second valve 93 is provided in the middle of the compressed air supply path connecting the air soccer 87 and the compressed air source 91. The second valve 93 is a solenoid valve for switching whether or not compressed air is supplied to the air soccer 87. The opening and closing of the second valve 93 is controlled by the unit controller 25. By controlling the opening and closing of the second valve 93, the generation and stop of the suction air flow in the air soccer 87 (capture device 83) are switched.

As described above, in the present embodiment, the catching device 83 includes the air soccer 87. As a result, in the capture device 83, a strong suction air flow is generated in the capture opening 89 by the air flow generated by the injection of air, and the yarn end 7t of the spun yarn 7 on the package 9 side is sucked. Can be reliably held. The catching device 83 may not necessarily include the air soccer 87 as long as it can catch the yarn end 7t of the spun yarn 7 on the package 9 side with a sufficient suction force.

The timing at which the catching device 83 operates the air soccer 87 to 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 operate the air soccer 87 at the timing when it is determined that the amount of the spun yarn 7 remaining in the yarn storage roller 41 is less than the predetermined amount. The amount of spun yarn 7 remaining in the yarn storage roller 41 can be determined based on the detection result of the yarn detection sensor 47.

In the present embodiment, when the yarn end 7t of the spun yarn 7 is wound around the package 9, the rotation of the package 9 is controlled by the unit controller 25. Specifically, it is as follows. As described above, the spun yarn 7 (spun yarn 7 on the package 9 side) is unwound from the yarn storage roller 41 to the downstream side by the normal rotation of the package 9. Immediately after the timing at which the yarn end 7t of the spun yarn 7 is separated from the yarn storage roller 41 due to the unwinding of the spun yarn 7 from the yarn storage roller 41, the yarn end 7t of the spun yarn 7 is captured by the catching device 83. As a result, when the detection device 81 stops detecting the spun yarn 7, the unit controller 25 stops the normal rotation of the package 9. By this control, the normal rotation of the package 9 can be stopped before the yarn end 7t is completely wound by the package 9.

Package 9 is then temporarily reversed. As a result, a part of the spun yarn 7 is unwound from the package 9 and sucked into the catching device 83. The spun yarn 7 sucked into the catching device 83 is discarded in the process of performing the yarn splicing in the yarn splicing device 19. How much the package 9 is reversed is adjusted according to the length of the yarn defect contained in the spun yarn 7 detected by the yarn monitoring device 15. As a result, when the yarn defect contained in the spun yarn 7 on the package 9 side is short, the length of the spun yarn 7 sucked and removed by the capture device 83 can be shortened by reducing the reversal amount of the package 9. This makes it possible to reduce the amount of spun yarn 7 that is discarded.

When the package 9 is temporarily reversed, if the suction force of the capture device 83 is insufficient, the spun yarn 7 on the package 9 side is not unwound and sticks to the surface of the package 9 without separating. There is. When the package 9 is reversed in this state, reverse winding occurs in which the spun yarn 7 is wound in the direction opposite to the normal direction. Reverse winding causes a failure in the yarn splicing process by the yarn splicing device 19 and a deterioration in the quality of the package 9. However, in the present embodiment, by operating the air soccer 87 in the catching device 83, the spun yarn 7 can be strongly sucked and pulled from the catching opening 89. As a result, it is possible to prevent the occurrence of reverse winding.

In the present embodiment, the first injection device 97 is provided on the downstream side of the yarn storage roller 41. The first injection device 97 is arranged at a position facing the capture device 83 (capture opening 89) so as to sandwich the path 111 of the spun yarn 7. In other words, the first injection device 97 and the capture device 83 (capture opening 89) are provided in a straight line. Therefore, the first injection device 97 can inject air into the capture device 83 (capture opening 89). The air injected from the first injection device 97 flows in the direction of the arrow 99 in FIG. 5 toward the capture opening 89 of the capture device 83. As a result, the portion in the vicinity of the yarn end 7t of the spun yarn 7 on the package 9 side is blown into the capture opening 89, so that the capture device 83 can more reliably capture the yarn end 7t. The timing at which the first injection device 97 injects is not particularly limited. This timing may be, for example, the timing at which the yarn detection sensor 47 no longer detects the spun yarn 7, that is, the timing at which the spun yarn 7 is about to disappear from the yarn storage roller 41, or the capture device 83 operates the air soccer 87. It may be the timing to make it.

The compressed air generated by the 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 thread path (capture opening 89 of the capture device 83). A third valve 103 is provided in the middle of 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 or not compressed air is supplied to the first injection device 97. The opening and closing of the third valve 103 is controlled by the unit controller 25. By controlling the opening and closing of the third valve 103, the execution and stop of the injection of the compressed air in the first injection device 97 are switched. The spinning unit 1 may be configured so that compressed air is supplied from a single compressed air source without separately providing the compressed air source 101 and the compressed air source 91.

In the present embodiment, as shown in FIG. 1, the second injection device 105 is provided on the downstream side of the first injection device 97. The second injection device 105 is fixedly provided on the spinning unit 1 or the work cart shown in the figure. The second injection device 105 captures the yarn end 7t of the spun yarn 7 on the package 9 side when the spun yarn 7 is split between the yarn storage device 17 and the take-up device 21 in the yarn traveling direction. Compressed air is injected so as to guide toward. The second injection device 105 can be configured in the same manner as the first injection device 97. As a result, when the spun yarn 7 is split on the downstream side in the yarn traveling direction from the yarn storage device 17 due to a failure of the yarn splicing in the yarn splicing device 19, the second injection device is used while reversing the package 9. By injecting compressed air from 105, the yarn end 7t of the spun yarn 7 on the package 9 side can be captured by the capture device 83. As a result, the yarn end 7t of the spun yarn 7 is guided to a position where the yarn splicing can be performed by the yarn splicing device 19. Therefore, the spun yarn 7 on the package 9 side can be processed with a simple structure. The package 9 is reversed by the take-up device 21 at the same time as or substantially at the same time as the start of the injection of the compressed air from the second injection device 105.

As described above, the spinning unit 1 included in the spinning machine of the present embodiment includes a yarn feeding device 23, a winding device 21, a yarn storage device 17, a detection device 81, and a capture device 83. .. The yarn feeder 23 can supply the spun yarn 7. The take-up device 21 winds the spun yarn 7 supplied from the yarn feeder 23 to form the package 9. The yarn storage device 17 is arranged in the middle of a thread path (thread traveling path) formed between the thread feeding device 23 and the winding device 21. The yarn storage device 17 has a yarn storage roller 41 that winds up and stores the spun yarn 7 of the yarn feeder 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 is split on the upstream side in the yarn traveling direction from the yarn storage device 17. The detection device 81 is arranged on the downstream side in the yarn traveling direction with respect to the yarn storage roller 41. The catching device 83 catches the thread end of the thread on the package 9 side on the downstream side of the thread storage device 17 (thread storage roller 41). Based on the detection result of the detection device 81, the spun yarn 7 on the package 9 side is wound around the package 9 so that the yarn end 7t of the spun yarn 7 on the package 9 side stops at a position where the yarn end 7t can be captured by the capture device 83. Stops.

As a result, by detecting the position of the yarn end 7t of the spun yarn 7 on the package 9 side by the detection device 81, the rotation of the package 9 in a state where the yarn end 7t of the spun yarn 7 on the package 9 side can be captured by the capture device 83. Can be easily stopped. Therefore, when the spun yarn 7 is divided on the upstream side in the yarn traveling direction from the yarn storage device 17, the spun yarn 7 on the package 9 side can be processed with a simple configuration.

In the spinning machine of the present embodiment, the detection device 81 is a sensor arranged on the downstream side in the yarn traveling direction with respect to the yarn storage roller 41.

Thereby, it can be detected 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.

In the spinning machine of the present embodiment, the sensor, which is the detection device 81, is a reflection type sensor.

As a result, the yarn end 7t of the spun yarn 7 on the package 9 side can be easily detected.

In the spinning machine of the present embodiment, the catching device 83 includes an air soccer 87 that generates a suction flow by being supplied with compressed air.

As a result, the spun yarn 7 can be strongly sucked in the capture device 83 by the air flow generated by injecting air. Therefore, when the package 9 is reversed due to the unwinding of the spun yarn 7 from the package 9, reverse winding occurs in which the spun yarn 7 on the package 9 side is wound in the opposite direction to the package 9. Can be prevented.

The spinning machine of the present embodiment includes a first injection device 97. The first injection device 97 is arranged on the opposite side of the capture device 83 with the path 111 of the spun yarn 7, which is a part of the yarn traveling path, interposed therebetween, and injects air into the capture device 83.

As a result, the air injected from the first injection device 97 can guide the yarn end 7t of the spun yarn 7 on the package 9 side toward the capture device 83. Therefore, the thread end 7t can be reliably captured by the capture device 83.

The spinning machine of the present embodiment includes a guide 55. The guide 55 is arranged on the downstream side of the yarn storage roller 41 and guides the spun yarn 7 wound around the package 9. The detection device 81 is arranged on the downstream side of the guide 55.

As a result, the yarn traveling path is stabilized by the guide 55, and when the spun yarn 7 is split, the yarn end 7t of the spun yarn 7 on the package 9 side is separated from the yarn traveling path. The end 7t can be reliably detected by the detection device 81.

The spinning machine of the present embodiment includes a yarn splicing device 19. The yarn splicing device 19 joins the spun yarn 7 on the yarn feeder 23 side and the spun yarn 7 on the package 9 side when the spun yarn 7 is split on the upstream side in the yarn traveling direction from the yarn storage device 17. Performs thread splicing. The detection device 81 is arranged between the guide 55 and the thread splicing device 19 in the thread traveling direction.

As a result, the yarn end 7t of the spun yarn 7 on the package 9 side can be satisfactorily detected by the detection device 81 at a position suitable for the yarn splicing operation by the yarn splicing device 19 in the yarn traveling direction.

The spinning machine of the present embodiment includes a second injection device 105. The second injection device 105 guides the yarn end 7t of the spun yarn 7 on the package 9 side toward the catching device 83 when the spun yarn 7 is split on the downstream side in the yarn traveling direction from the yarn storage device 17. Inject air like this. The second injection device 105 is located on the downstream side of the take-up device 21 and in the vicinity of the take-up device 21, and the injection hole of the second injection device 105 is located at the capture position by the capture device 83. It is provided to correspond.

As a result, even if the yarn end 7t of the spun yarn 7 on the package 9 side is located downstream of the capture device 83, the spun yarn 7 on the package 9 side can be pulled out from the package 9 and captured by the capture device 83. can.

The spinning machine of the present embodiment includes a yarn monitoring device 15 capable of detecting a yarn defect contained in the spun yarn 7 supplied from the yarn feeder 23. When the yarn monitoring device 15 detects a yarn defect, the spun yarn 7 is split on the upstream side in the yarn traveling direction from the yarn storage device 17. The winding device 21 winds the package 9 in the winding direction of the package 9 so that the spinning yarn 7 of the length required for removing the yarn defect among the spinning yarns 7 on the package 9 side is captured by the capturing device 83. Rotate in the opposite direction.

As a result, the yarn defect detected by the yarn monitoring device 15 can be reliably removed by the capture device 83.

Although the preferred embodiment of the present invention has been described above, the above configuration can be changed as follows, for example. The above embodiment and the following modifications can be combined as appropriate.

Instead of the suction device 49, an injection device (thread action unit) that injects air around the thread storage roller 41 may be provided. This injection device may be configured to inject air in the tangential direction of the yarn storage roller 41 in the above-mentioned uppermost stream portion 80, for example. The direction of air injection may be the same as or different from the direction of the suction air flow at the suction port 71 shown in FIG. Of the spun yarn 7 on the package 9 side, the portion upstream of the yarn storage roller 41 is blown along the jet flow. Therefore, the free yarn end 7a can be prevented from coming into contact with the spun yarn 7 already wound around the reservoir 41a. As described above, the injection device is slower than the suction device 49, but can substantially guide the spun yarn 7. By injecting air from the injection device, it is possible to impart a resistance force against the running of the spun yarn 7 in the direction of being wound by the yarn storage roller 41.

Instead of the suction device 49, an appropriate clamping device (yarn acting portion) configured to be able to sandwich the yarn end 7t of the spun yarn 7 on the package 9 side may be provided. The spun yarn 7 may be sandwiched between the arms arranged in a pair, or may be sandwiched between the rollers arranged in a pair. The clamping device can restrain the spun yarn 7 from moving by sandwiching the spun yarn 7. For example, by providing a damper on the shaft of the roller, it is possible to impart a resistance force against the running of the spun yarn 7 in the direction of being wound by the yarn storage roller 41.

When a roller pair is provided instead of the suction device 49, the roller pair may perform a drawing operation of pulling out the spinning yarn 7 from the spinning device 13. In this case, the yarn storage roller 41 stores the spun yarn 7 drawn by the roller pair.

Instead of the suction device 49, a brush or comb teeth (thread acting portion) for hooking the spun yarn 7 may be provided. By hooking the spun yarn 7 on a brush or the like, the spun yarn 7 can be restrained so as not to move.

The detection device 81 is provided at an end portion of the yarn storage roller 41 on the downstream side in the yarn traveling direction with respect to the outer peripheral surface of the yarn storage roller 41, and is arranged so as to face the end portion. It may be. The sensor is arranged at a position facing the roller surface on the downstream side of the yarn running from the axially central portion of the yarn storage roller 41. In this case, the yarn path of the spun yarn 7 traveling from the yarn storage roller 41 via the fryer 45 may be regulated by a regulating means before the timing when the sensor is expected to detect the yarn end 7t. can. The regulating means may be, for example, a member provided in the vicinity of the fryer 45 and capable of stopping the rotation of the fryer 45 of the yarn storage device 17. By regulating the yarn path by the fryer 45, the yarn end 7t can be stably detected by the sensor.

The detection device 81 may be a line sensor. The line sensor is arranged at a position adjacent to the thread storage roller 41 along the axial direction of the thread storage roller 41. The line sensor faces the outer peripheral surface of the storage unit 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 provided so as to be able to detect a position included in the region on the downstream side in the yarn traveling direction from the central portion in the axial direction of the yarn storage roller 41. If all the 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.

The detection device 81 may be a sensor provided in the vicinity of the suction port 71 of the suction device 49. When all the spun yarns 7 are unwound from the yarn storage roller 41, the yarn end 7c is pulled out from the suction port 71. Therefore, by arranging the sensor in the vicinity of the suction port 71, the thread end 7t (7c) can be stably detected.

In the above-described embodiment, when the yarn monitoring device 15 detects a yarn defect, the spinning device 13 stops spinning, thereby cutting the spun yarn 7. Instead of this, the spun yarn 7 may be cut by a cutter provided on the upstream side of the yarn storage device 17.

When a plurality of spinning units 1 are provided, instead of the configuration in which the yarn splicing device 19 is provided in each spinning unit 1, it is possible to run on a plurality of spinning units 1, and if necessary, at a working position with respect to the spinning unit 1. A configuration may be adopted in which a thread splicing carriage is provided to stop and perform thread splicing.

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

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

In the above embodiment, the spun yarn 7 on the package 9 side is spliced with the spun yarn 7 supplied from the yarn feeder 23 by the yarn splicing device 19. However, the split spun yarn 7 may be re-established in a continuous state by a known piecing method.

In view of the above teachings, it is clear that the present invention can take many modified and modified forms. Therefore, it should be understood that the invention may be practiced in ways other than those described herein, within the scope of the appended claims.

1 Spinning unit 7 Spinning yarn (thread)
9 Package 17 Thread storage device 19 Thread splicing device 21 Winding device 23 Thread feeding device 55 Guide (guide member)
81 Detection device 83 Capture device 87 Air soccer 97 First injection device 105 Second injection device

Claims (11)

A yarn feeder that can supply yarn and
A winding device that winds the yarn supplied from the yarn feeding device to form a package, and a winding device.
A yarn storage device arranged in the middle of a yarn traveling path formed between the yarn feeding device and the winding device,
A detection device that detects the 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 that catches the yarn end of the yarn on the package side on the downstream side of the yarn storage device.
Equipped with
The yarn storage device has a thread storage roller that winds up and stores threads from the thread feeding device.
The detection device is located on the downstream side in the thread traveling direction with respect to the thread storage roller, the end portion on the downstream side in the thread traveling direction with respect to the outer peripheral surface of the thread storage roller, and the end portion on the downstream side in the thread traveling direction with respect to the axial center portion of the thread storage roller. If a suction port capable of sucking the thread to be unwound from the thread storage roller is provided, it is provided in the vicinity of the suction port.
Spinning characterized in that the winding of the yarn on the package side is stopped so that the yarn end of the yarn on the package side is stopped at a position where the yarn on the package side can be captured based on the detection result of the detection device. Machine. The spinning machine according to claim 1.
The detection device is a spinning machine characterized by being a sensor arranged on the downstream side in the yarn traveling direction with respect to the yarn storage roller. The spinning machine according to claim 2.
The sensor is a spinning machine characterized by being a reflective sensor. The spinning machine according to any one of claims 1 to 3.
The capturing device is a spinning machine including air soccer that generates a suction flow by being supplied with compressed air. The spinning machine according to any one of claims 1 to 4.
The detection device is a sensor facing the end portion on the downstream side in the yarn traveling direction from the axial central portion of the yarn storage roller.
Further provided with a regulating means for regulating the thread path of the thread unwound from the thread storage roller included in the thread traveling path at a timing before the sensor detects the thread end of the thread on the package side. A spinning machine characterized by that. The spinning machine according to claim 1.
The detection device is a spinning machine characterized by being a line sensor. The spinning machine according to any one of claims 1 to 6.
A spinning machine comprising a first injection device that is arranged on the opposite side of the capture device with a part of the yarn traveling path and injects air into the capture device. The spinning machine according to any one of claims 1 to 7.
It is provided on the downstream side of the yarn storage roller and is provided with a guide member for guiding the yarn to be wound on the package.
The detection device is a spinning machine characterized in that it is arranged on the downstream side of the guide member. The spinning machine according to claim 8.
It is provided with a yarn splicing device that performs a yarn splicing process for splicing a yarn on the yarn feeder side and a yarn on the package side when a yarn is split on the upstream side in the yarn traveling direction from the yarn storage device.
The detection device is a spinning machine characterized in that it is arranged between the guide member and the thread splicing device in the thread traveling direction. The spinning machine according to any one of claims 1 to 9.
It is provided with a second injection device that injects air so as to guide the thread end of the thread on the package side toward the capture device when the thread is broken on the downstream side in the thread traveling direction from the thread storage device. A spinning machine characterized by that. The spinning machine according to any one of claims 1 to 10.
A yarn monitoring device capable of detecting a yarn defect contained in the yarn supplied from the yarn feeder is provided.
When the yarn monitoring device detects a yarn defect, the yarn is split on the upstream side in the yarn traveling direction from the yarn storage device.
The take-up device reverses the take-up direction of the package so that the take-up device catches the thread of the length required for removing the thread defect among the threads on the package side. A spinning machine characterized by rotating in a direction.

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