JP2017071865A - Spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spinning machine capable of reducing yarn waste quantity by preventing spun yarn from being unnecessarily removed.SOLUTION: A spinning machine includes: a draft device 7; an air spinning device 9; a yarn storage roller 21; a yarn removing device 65; and a unit controller. The draft device 7 is capable of operating in one of a first mode in which a spinning resumption operation is performed so that a draft ratio is different from that during a normal spinning operation time and a second mode in which the spinning resumption operation is performed so that the draft ratio becomes the same as that during the normal spinning operation. The yarn storage roller 21 rotates in a state that spun yarn 10 is wound around the surrounding and is stored. The yarn removing device 65 is capable of removing the spun yarn 10 stored in the yarn storage roller 21. The unit controller is capable of changing the length of the spun yarn 10 removed from the yarn storage roller 21 by the yarn removing device 65 depending on whether the draft device 7 operates in the first mode or the second mode after finishing the spinning resumption operation.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a configuration of a spinning machine that includes a yarn accumulating roller and performs spinning while repeatedly stopping and restarting spinning as necessary.

  2. Description of the Related Art Conventionally, in a spinning machine that performs spinning using an air flow after drafting a fiber bundle, a configuration that includes means for storing generated spun yarn is known. Patent Document 1 and Patent Document 2 disclose this type of spinning machine.

  The spinning machine of Patent Document 1 includes a yarn accumulating roller provided between an upstream spinning device and a downstream winding device, and is generated at the time of resuming spinning by a yarn removing lever provided in the vicinity of the yarn accumulating roller. The spun yarn can be removed from the yarn accumulating roller. The spun yarn removed from the yarn accumulating roller is discarded through a suction pipe for guiding the spun yarn from the spinning device to the yarn joining device. According to Patent Document 1, it is possible to prevent the yarn with unstable quality from being mixed into the package wound by the winding device with this configuration.

  The spinning machine disclosed in Patent Document 2 includes a slack tube for temporarily storing the yarn discharged from the spinning member that has been spun during the yarn splicing operation by the yarn splicing carriage. The spinning machine of Patent Document 2 is configured such that the draft ratio in the draft device can be changed between when spinning is resumed and when spinning is normal. Patent Document 2 assumes that, with this configuration, the yarn can be reliably generated when the spinning is resumed, and the success rate of the yarn joining by the yarn joining device can be improved.

JP 2010-180007 A JP 2003-278035 A

  The above-mentioned Patent Document 1 does not mention specific control of the yarn removal operation by the yarn removal lever. The spinning machine of Patent Document 2 does not include a yarn accumulating roller and a yarn removing lever. Therefore, when a spun yarn different from normal is generated by the spinning resumption operation, it is difficult to remove such spun yarn with an appropriate length. As a result, for example, normal spun yarn is also removed, and the amount of yarn waste may increase.

  An object of the present invention is to prevent the spun yarn generated by the spinning resuming operation from being removed more than necessary and to reduce the amount of yarn waste.

Means and effects for solving the problems

  According to a first aspect of the present invention, a spinning machine includes a draft device, an air spinning device, a yarn accumulating roller, a yarn removing device, and a control unit. The draft device drafts a fiber bundle. The air spinning device generates a spun yarn by twisting the fiber bundle drafted by the draft device by an air flow by a spinning resuming operation and a normal spinning operation performed after the spinning resuming operation. The yarn storage roller rotates in a state where the spun yarn is wound around and stored. The yarn removing device removes the spun yarn stored in the yarn storage roller. The controller can change the length of the spun yarn that the yarn removing device removes from the yarn accumulating roller according to a draft ratio during the spinning resumption operation.

  Thus, depending on whether the draft ratio during the spinning resumption operation is different from or the same as the draft ratio during the normal spinning operation, the yarn removing device removes the spun yarn of an appropriate length from the yarn accumulating roller. Can do.

  The spinning machine preferably has the following configuration. The draft device has a first mode in which the fiber bundle is drafted at different draft ratios during the spinning resumption operation and the normal spinning operation, and at the same draft ratio during the spinning resumption operation and during the normal spinning operation. The fiber bundle is drafted in any of the second mode in which the fiber bundle is drafted. The control unit determines whether the yarn removing device removes the yarn accumulating roller from the yarn accumulating roller after the spinning resuming operation, depending on whether the draft device is drafting the fiber bundle in the first mode or the second mode. Control is made to change the length of the spun yarn to be removed.

  Thereby, the operation | movement which changes the length of the spun yarn which a yarn removal apparatus removes from a yarn storage roller according to the draft ratio at the time of a spinning resumption operation | movement can be implement | achieved by simple control.

  The spinning machine preferably has the following configuration. The spinning machine further includes a yarn hooking member. The yarn hooking member is rotatably provided with respect to the yarn accumulating roller, and can guide the spun yarn. The yarn removing device includes a yarn removing member. The yarn removing member can perform a yarn removing operation to remove the spun yarn from the yarn hooking member by moving. The control unit can change an operation time length during which the yarn removing member performs the yarn removing operation depending on whether the draft device is operating in the first mode or the second mode.

  Thereby, the length of the spun yarn to be removed can be easily changed by changing the operation time length of the yarn removing member.

  In the spinning machine, the control unit is configured such that the operation time length of the yarn removing member when the first mode is executed is equal to the operation time length of the yarn removing member when the second mode is executed. It is preferable to control the yarn removal operation so as to be longer than the operation time length.

  Thereby, when the first mode is executed, the spun yarn can be removed longer, and when the second mode is executed, the spun yarn can be removed shorter. As a result, the amount of yarn waste when the second mode is executed can be reduced.

  According to the second aspect of the present invention, the spinning machine includes a draft device, an air spinning device, a yarn accumulating roller, a yarn hooking member, a yarn removing member, a yarn removing device, and a control unit. . The draft device performs a draft for stretching the fiber bundle. The pneumatic spinning device performs spinning to generate a spun yarn by twisting the fiber bundle drafted by the draft device by an air flow. The yarn accumulating roller winds and stores the spun yarn around it by rotating. The yarn hooking member is rotatably provided with respect to the yarn accumulating roller, and can guide the spun yarn. The yarn removing member can perform a yarn removing operation for removing the spun yarn from the yarn hooking member. The yarn removing device includes a yarn removing member having a suction port for sucking and capturing the spun yarn. The control unit controls the thread removing member. The thread removal member is movable to a thread removal position that is a position when the thread removal operation is performed, and a retracted position that is retracted from the thread removal position. The control unit can change a length of time that the thread removing member is located at the thread removing position.

  As a result, the spun yarn having an appropriate length can be removed from the yarn accumulating roller by changing the length of time that the yarn removing member is located at the yarn removing position.

  The spinning machine preferably has the following configuration. When the thickness of the spun yarn generated by the pneumatic spinning device during the normal spinning operation is the first thickness, the draft device is configured such that the thickness of the fiber bundle supplied to the pneumatic spinning device is the normal spinning. The fiber bundle is drafted in the first mode so that it becomes thicker during the spinning resumption operation than during the operation. When the thickness of the spun yarn generated by the pneumatic spinning device during the normal spinning operation is a second thickness that is thicker than the first thickness, the drafting device takes the fiber bundle in the second mode. Draft.

  Thus, even when a thin spun yarn is generated during the normal spinning operation, the spun yarn is reliably generated by making the draft ratio during the spinning resumption operation different from the draft ratio during the normal spinning operation.

  The spinning machine preferably has the following configuration. When the thickness of the spun yarn generated by the pneumatic spinning device during the normal spinning operation is the second thickness, the draft device drafts the fiber bundle in the second mode. When the thickness of the spun yarn generated by the pneumatic spinning device during the normal spinning operation is a third thickness larger than the second thickness, the draft device is supplied to the pneumatic spinning device. The fiber bundle is drafted in the first mode so that the thickness of the fiber bundle becomes thinner during the spinning resumption operation than during the normal spinning operation.

  Thus, even when a thick spun yarn is generated during the normal spinning operation, the spun yarn is reliably generated by making the draft ratio during the spinning resumption operation different from the draft ratio during the normal spinning operation.

  The spinning machine preferably has the following configuration. The control unit controls the yarn removing device to remove the spun yarn over a first time length when a spinning speed at which the pneumatic spinning device generates the spun yarn is faster than a predetermined speed. The control unit controls the yarn removing device to remove the spun yarn over a second time length longer than the first time length when the spinning speed is slower than the predetermined speed.

  Thereby, when the spinning speed is high, the time for removing the spun yarn can be shortened, and when the spinning speed is slow, the time for removing the spun yarn can be lengthened. As a result, even if the spinning speed is different, an appropriate amount of spun yarn can be removed during the spinning resumption operation.

  The spinning machine preferably has the following configuration. The spinning machine includes a winding device and a yarn joining device. The winding device winds the spun yarn around a package. The yarn splicing device includes a yarn end of the spun yarn from the air spinning device and a spinning from the winding device at a position between the pneumatic spinning device and the winding device in the traveling direction of the spun yarn. Join the yarn end to the yarn end. The yarn removing device sucks the spun yarn removed from the yarn accumulating roller, removes at least the spun yarn generated by the pneumatic spinning device during the spinning resuming operation of the draft device, and transfers it to the yarn joining device. invite.

  As a result, the spun yarn generated from the fiber bundle drafted at a draft ratio different from that during the normal spinning operation is removed from the spun yarn generated by the normal spinning and then spliced to wind the spun yarn around the package. Since it can be taken, a high-quality package can be formed. Since the spun yarn as described above is removed by the yarn removing device, the configuration of the spinning machine can be simplified.

  In the spinning machine, it is preferable that the spun yarn is directly pulled out from the pneumatic spinning device by the yarn accumulating roller.

  Accordingly, the spun yarn can be stored while being pulled out from the pneumatic spinning device with a stable tension.

  The spinning machine preferably further includes a setting unit that sets at least one of the thickness and spinning speed of the spun yarn generated by the pneumatic spinning device.

  Accordingly, the spun yarn having an appropriate length can be removed by a simple operation in the setting unit in accordance with the draft ratio during the spinning resuming operation.

1 is a front view showing an overall configuration of a spinning machine according to an embodiment of the present invention. The longitudinal cross-sectional view of a spinning machine. The block diagram which concerns on control of a spinning machine. The longitudinal cross-sectional view which shows a mode that spinning was restarted and the upper yarn and the lower yarn were each captured by the suction nozzle and the suction mouse. The longitudinal cross-sectional view of a thread | yarn storage apparatus. The perspective view of a thread | yarn storage apparatus. The longitudinal cross-sectional view which shows a mode immediately after starting winding of the spun yarn by a yarn storage roller. The longitudinal cross-sectional view which shows a mode that the spun yarn is stored by the yarn storage roller. The longitudinal cross-sectional view which shows a mode that the spun yarn with unstable quality is removed from the yarn storage roller.

  Next, a spinning machine (spinning machine) according to an embodiment of the present invention will be described with reference to the drawings. In this specification, the terms “upstream” and “downstream” mean upstream and downstream in the traveling direction of the fiber bundle 8 and the spun yarn 10 during spinning.

  A spinning machine 1 as a spinning machine shown in FIG. 1 includes a large number of spinning units 2 arranged in parallel, a yarn splicing carriage 3, a prime mover box 5, and a blower box 80.

  Each spinning unit 2 includes a draft device 7, an air spinning device 9, a yarn storage device 12, and a winding device 13 as main components in order from upstream to downstream. The spinning machine 1 includes a frame 6 to which a draft device 7, an air spinning device 9, a yarn storage device 12, a winding device 13, and the like are attached. In the spinning machine 1, the fiber bundle 8 sent from the draft device 7 is spun by the air spinning device 9, whereby a spun yarn 10 is generated. The spun yarn 10 sent out from the air spinning device 9 passes through a yarn quality monitoring device 52 described later, and is temporarily stored in the yarn storage device 12. Thereafter, the spun yarn 10 is wound by the winding device 13 to form a package 45.

  The draft device 7 performs drafting by drawing the sliver 15 into the fiber bundle 8. As shown in FIG. 2, the draft device 7 includes four roller pairs: a back roller pair 16, a third roller pair 17, an apron belt 18 around which a middle roller pair 19 and a front roller pair 20 are wound. .

  The bottom roller of the middle roller pair 19 and the bottom roller of the front roller pair 20 are connected to a common electric motor in the plurality of spinning units 2 so that the plurality of spinning units 2 are always driven at the same rotational speed. It is configured. The bottom roller of the back roller pair 16 and the bottom roller of the third roller pair 17 are driven by an electric motor disposed in each spinning unit 2, and the rotation speed is controlled independently for each spinning unit 2. The drive, stop, and rotation speed of the electric motor that drives the back roller pair 16 and the third roller pair 17 are controlled by a unit controller (control unit) 60 shown in FIG.

  In each spinning unit 2, the draft ratio of the draft device 7 is changed by changing the rotation speed of the electric motor that drives the back roller pair 16 and the third roller pair 17 according to the situation, and is sent to the pneumatic spinning device 9. The thickness of the resulting fiber bundle 8 (and hence the thickness of the spun yarn 10 spun by the pneumatic spinning device 9) can be changed. In the spinning machine 1 of the present embodiment, an operator operates an input unit (setting unit) 32 of a machine control device 30 (to be described later) to input information on the thickness of the spun yarn 10, whereby the draft ratio of the draft device 7 is set. Can be changed. The “draft ratio” is a ratio of the amount of fibers or the number of fibers of the fiber bundle 8 before and after being processed by the draft device 7.

  The pneumatic spinning device 9 includes a spinning chamber, a fiber guide, a swirling air flow generating nozzle, and a hollow guide shaft. The fiber guide unit guides the fiber bundle 8 supplied from the draft device 7 into the spinning chamber. The swirling airflow generating nozzle is arranged around the path along which the fiber bundle 8 travels. When air is injected from the swirling air flow generating nozzle, a swirling air flow is generated in the spinning chamber. By this swirling air flow, the fiber ends of the plurality of fibers constituting the fiber bundle 8 are reversed and swirled. The hollow guide shaft body guides the spun yarn 10 from the spinning chamber to the outside of the pneumatic spinning device 9. The air spinning device 9 injects air from a swirling air flow generating nozzle during a normal spinning operation described later. The pneumatic spinning device 9 includes an auxiliary nozzle that opens to a yarn passage inside the hollow guide shaft body. The air spinning device 9 starts the production of the spun yarn 10 by drawing the fiber bundle 8 into the spinning chamber by injecting air from the swirling air flow generation nozzle and the auxiliary nozzle during the spinning resumption operation described later.

  A yarn storage device 12 is disposed downstream of the pneumatic spinning device 9. The yarn accumulating device 12 applies a predetermined tension to the spun yarn 10 to pull out the spun yarn 10 from the air spinning device 9, and the spun yarn 10 sent from the air spinning device 9 at the time of yarn splicing by the yarn splicing carriage 3 or the like. It has a function of preventing slackness and a function of adjusting the tension so that fluctuations in tension from the winding device 13 are not transmitted to the pneumatic spinning device 9. As shown in FIG. 2, the yarn storage device 12 includes a yarn storage roller 21, a yarn hooking member 22, an upstream guide 23, an electric motor 25, a downstream guide 26, a yarn storage amount sensor 27, and a yarn. A release lever (thread removal member) 28.

  The yarn hooking member 22 is configured to be able to guide (hang) the spun yarn 10, and rotates the spun yarn 10 on the outer circumferential surface of the yarn accumulating roller 21 by rotating the spun yarn 10 in a guided state. It is configured to be able to guide.

  The yarn storage roller 21 is configured so that the spun yarn 10 can be wound around and stored on the outer peripheral surface thereof. The yarn accumulating roller 21 is rotationally driven by the electric motor 25 at a constant rotational speed. The spun yarn 10 guided to the outer peripheral surface of the yarn accumulating roller 21 by the yarn hooking member 22 is wound around the outer peripheral surface of the yarn accumulating roller 21 as the yarn accumulating roller 21 rotates, and is upstream of the yarn accumulating device 12. The spun yarn 10 is pulled. Thereby, the spun yarn 10 can be continuously pulled out from the pneumatic spinning device 9.

  As pointed out in Patent Document 1 above, a spinning machine that performs pneumatic spinning is also known to include a delivery roller for drawing spun yarn from the pneumatic spinning device on the downstream side of the pneumatic spinning device and the upstream side of the storage roller. It has been. In the configuration of Patent Document 1, a nip roller is disposed so as to face the delivery roller. When the delivery roller is rotationally driven in a state where the yarn is nipped between the delivery roller and the nip roller, the spun yarn is drawn out from the pneumatic spinning device. The spinning machine 1 of the present embodiment is configured such that the spun yarn 10 is directly pulled out from the pneumatic spinning device 9 by the yarn accumulating roller 21 without using the delivery roller as described above.

  In the configuration in which the spun yarn 10 is pulled out from the pneumatic spinning device 9 by the yarn accumulating roller 21 as in the present embodiment, the force for pulling out the spun yarn 10 from the pneumatic spinning device 9 is applied to the yarn accumulating roller 21 by a predetermined amount (for example, 10 turns). ) Is stable. When the contact area between the yarn accumulating roller 21 and the spun yarn 10 is increased, slipping or the like hardly occurs between the yarn accumulating roller 21 and the spun yarn 10. The spun yarn 10 can be pulled out from the pneumatic spinning device 9 at a stable speed by rotating the yarn accumulating roller 21 in a state where a predetermined amount or more of the spun yarn 10 is wound on the yarn accumulating roller 21. As described above, in the spinning machine 1 of the present embodiment, the spun yarn 10 can be pulled out with a stable tension and speed by the yarn accumulating device 12, so that the spun yarn 10 with uniform quality can be produced. The above-mentioned predetermined amount (yarn storage amount in which the force that pulls the spun yarn 10 is stable without slipping) may be referred to as “required minimum storage amount” in the following description.

  The yarn storage amount sensor 27 is configured as a non-contact type sensor, for example, and detects whether the storage amount of the spun yarn 10 stored on the yarn storage roller 21 is greater than or less than a predetermined amount. To do. The yarn storage amount sensor 27 transmits the detection result to the unit controller 60.

  The upstream guide 23 is disposed slightly upstream of the yarn accumulating roller 21. The upstream guide 23 appropriately guides the spun yarn 10 to the outer peripheral surface of the yarn accumulating roller 21, and the twist of the spun yarn 10 propagated from the pneumatic spinning device 9 is on the downstream side of the upstream guide 23. Prevent transmission.

  The downstream guide 26 is disposed slightly downstream of the yarn accumulating roller 21. The downstream guide 26 regulates the trajectory of the spun yarn 10 that is swung around by the rotating yarn hooking member 22, stabilizes the traveling path of the spun yarn 10 on the downstream side of the yarn accumulating roller 21, and guides the spun yarn 10.

  The yarn removing lever 28 is disposed on the upstream side of the downstream guide 26 in the vicinity of the downstream end portion of the yarn accumulating roller 21. The thread release lever 28 is configured to be swingable about a swing shaft 28b.

  A yarn quality monitoring device 52 is provided at a position between the air spinning device 9 and the yarn accumulating device 12 on the front side of the frame 6 of the spinning machine 1. The spun yarn 10 generated by the pneumatic spinning device 9 passes through the yarn quality monitoring device 52 before being wound by the yarn storage device 12. The yarn quality monitoring device 52 monitors the thickness of the traveling spun yarn 10 and transmits a yarn defect detection signal to the unit controller 60 when a yarn defect in the spun yarn 10 is detected.

  As shown in FIGS. 1 and 2, the yarn joining cart 3 includes a splicer (yarn joining device) 43, a suction nozzle (yarn removing member) 44, a suction mouth 46, a push-up arm 47, and a pneumatic cylinder 49. It is equipped with. When a yarn breakage or yarn cut occurs in a spinning unit 2, the yarn splicing carriage 3 travels on the rail 41 fixed to the frame 6 to the spinning unit 2, stops, and performs yarn splicing.

  As shown in FIG. 4, the suction nozzle 44 is configured as an elongated member that can rotate in the vertical direction about an axis, and a suction port is formed at the tip thereof. The suction nozzle 44 is configured so that the yarn end (upper yarn) fed from the pneumatic spinning device 9 can be captured while sucked from the suction port and guided to the splicer 43. The suction mouse 46 is pivotable in the vertical direction around the axis so that the yarn end (lower yarn) can be sucked and captured from the package 45 supported by the winding device 13 and guided to the splicer 43. It is configured. Although a detailed configuration of the splicer 43 is omitted, the splicer 43 is configured to splice the upper yarn and the lower yarn by twisting the yarn ends together by a swirling air flow.

  The push-up arm 47 is disposed at a tip portion of a pneumatic cylinder 49 as an actuator. By driving the pneumatic cylinder 49, the push-up arm 47 moves to the upper advanced position. As a result, the push-up arm 47 pushes up the thread removal lever 28, and the thread removal lever 28 is moved to the raised position as shown in FIG.

  The winding device 13 includes a cradle arm 71, a winding drum 72, and a traverse device 75. The cradle arm 71 is supported so as to be swingable around the support shaft 70. The cradle arm 71 can rotatably support a bobbin 48 for winding the spun yarn 10. The winding drum 72 is configured to be able to be driven in contact with the outer peripheral surface of the package 45 formed by winding the spun yarn 10 around the bobbin 48 or the bobbin 48. The traverse device 75 includes a traverse guide 76 that can guide the spun yarn 10. By driving the winding drum 72 by an electric motor (not shown) while reciprocating the traverse guide 76 by a driving means (not shown), the package 45 can be rotated and the spun yarn 10 can be wound while traversing. The drive of each component constituting the winding device 13 (drive of a lift cylinder described later for swinging the cradle arm 71) is controlled by a unit controller 60.

  The prime mover box 5 includes a machine base control device 30. The machine control device 30 controls the plurality of spinning units 2. The machine control device 30 includes a display unit 31 and an input unit 32. The display unit 31 is configured, for example, as a liquid crystal display, and displays information on the operating status and / or yarn quality of each spinning unit 2 by an appropriate operation of the operator. The input unit 32 includes a plurality of input keys, and accepts appropriate instructions from the operator to the spinning units 2, settings of various conditions, and the like.

  The blower box 80 is disposed on one end side in the direction in which the spinning units 2 are arranged in the spinning machine 1 and on the side opposite to the prime mover box 5. Inside the blower box 80, an air supply source for generating a suction air flow and a swirling air flow necessary for the winding operation of each spinning unit 2 is installed.

  Next, the detailed configuration of the yarn storage device 12 will be described with reference to FIGS. 5 and 6.

  The yarn accumulating roller 21 is a roller member made of a material having at least an outer peripheral surface having wear resistance, and is fixed to the motor shaft 25 a of the electric motor 25. The outer peripheral surface 21a of the yarn accumulating roller 21 has a proximal end side tapered portion 21b in order from the proximal end toward the distal end, assuming that the side having the yarn hooking member 22 is the distal end and the side on which the electric motor 25 is disposed is the proximal end. And a cylindrical portion 21c and a tip side tapered portion 21d.

  The cylindrical portion 21c is configured to have a shape in which the tip side is slightly narrowed, and is formed so as to be continuous with no step with respect to the tapered portions 21b and 21d on both sides. Instead of this, the cylindrical portion 21c may have a shape whose diameter is constant from the proximal end side to the distal end side, for example. The dimension of the cylindrical portion 21c is appropriately determined so that the spun yarn 10 having a length equal to or longer than the necessary minimum storage amount can be stored. The yarn storage amount sensor 27 is provided to face the cylindrical portion 21c.

  The proximal end side taper portion 21b and the distal end side taper portion 21d are each configured to have a gentle taper shape with the end face side being the larger diameter side. The proximal-side taper portion 21b smoothly moves the supplied spun yarn 10 from the large diameter portion toward the small diameter portion to reach the cylindrical portion 21c, so that the spun yarn 10 is wound around the surface of the cylindrical portion 21c in an orderly manner. It is configured to be attached. The tip side taper portion 21d prevents the loop-out phenomenon in which the spun yarn 10 wound around the cylindrical portion 21c is pulled out at a time. However, the tip side taper portion 21d may be omitted.

  The driving and stopping of the electric motor 25 is controlled by the unit controller 60. Thereby, the unit controller 60 can control the driving of the yarn accumulating roller 21 and the like. During normal winding, the unit controller 60 drives the yarn storage roller 21 to rotate at a constant speed in the rotation direction during normal winding. Thereby, the spun yarn 10 is wound around the yarn accumulating roller 21 at a constant speed, and the spun yarn 10 is pulled out from the pneumatic spinning device 9 at a constant speed by being pulled by the wound spun yarn 10.

  The yarn hooking member 22 is disposed on the tip side of the yarn accumulating roller 21. The rotation axes of the yarn hooking member 22 and the yarn accumulating roller 21 coincide with each other. The yarn hooking member 22 includes a flyer shaft 33 and a fryer 38 fixed to the tip thereof.

  The flyer shaft 33 is supported so as to be rotatable relative to the yarn accumulating roller 21. A permanent magnet is attached to either the flyer shaft 33 or the yarn accumulating roller 21, and a magnetic hysteresis material is attached to the other. By these magnetic means, torque is generated against the yarn hooking member 22 rotating relative to the yarn accumulating roller 21. By this resistance torque, the yarn hooking member 22 rotates following the rotation of the yarn accumulating roller 21, and as a result, the yarn accumulating roller 21 and the yarn hooking member 22 can rotate integrally. When a force that overcomes this resistance torque is applied to the yarn hooking member 22, the yarn hooking member 22 rotates relative to the yarn accumulating roller 21.

  The flyer 38 is appropriately curved toward the outer peripheral surface 21 a of the yarn accumulating roller 21 and is configured to be able to guide the spun yarn 10. The spun yarn 10 is guided to the outer peripheral surface 21 a of the yarn accumulating roller 21 by rotating the flyer 38 in a state where the yarn is not wound around the yarn accumulating roller 21. As a result, the spun yarn 10 starts to be wound around the yarn accumulating roller 21.

  Next, the appearance of the spun yarn 10 wound around the yarn accumulating roller 21 will be described. The spun yarn 10 that has passed through the upstream guide 23 is guided from the proximal end side tapered portion 21b to the outer peripheral surface 21a, and is wound around the cylindrical portion 21c a plurality of times. The spun yarn 10 drawn from the front end side of the outer peripheral surface 21 a passes through the flyer 38 and then is sent downstream through the downstream guide 26.

  As described above, the yarn storage device 12 includes the yarn removal lever 28. As shown in FIG. 6, the thread removal lever 28 is formed as a substantially L-shaped member having an elongated contact surface 28 a disposed horizontally. The base of the thread removal lever 28 is supported by a swing shaft 28b, and the thread release lever 28 swings (moves) up and down between the raised position and the lowered position about the swing shaft 28b. It is configured to be possible. When the yarn removal lever 28 is in the lowered position (retracted position, for example, the position shown in FIG. 2), the yarn removal lever 28 does not contact the yarn path of the spun yarn 10. When the yarn removal lever 28 is in the raised position (yarn removal position, for example, the position shown in FIG. 9), the contact surface 28 a pushes up the spun yarn 10, whereby the spun yarn 10 is detached from the fryer 38. The thread release lever 28 is normally held at the lowered position by being biased by a spring member (not shown). When the pneumatic cylinder 49 of the yarn splicing carriage 3 is driven, the yarn removing lever 28 is pushed by the push-up arm 47 and moves to the raised position.

  By moving the yarn release lever 28 to the raised position, the spun yarn 10 can be removed from the yarn hooking member 22 and the spun yarn 10 can be unwound from the yarn accumulating roller 21. If the yarn release lever 28 is held in the raised position while the spun yarn 10 is not wound around the yarn accumulating roller 21, the flyer 38 can be prevented from contacting the spun yarn 10, and the spun yarn 10 can be It is not wound around the storage roller 21.

  Next, a configuration for removing an unnecessary portion of the spun yarn 10 stored in the yarn storage device 12 will be described.

  As described above, the yarn removal lever 28 can remove the spun yarn 10 from the yarn hooking member 22 when the pneumatic cylinder 49 provided in the yarn splicing carriage 3 is driven and pushed up to the raised position by the push-up arm 47. This prevents the flyer 38 from coming into contact with the spun yarn 10 and prevents the spun yarn 10 from being wound around the yarn accumulating roller 21. The suction nozzle 44 can suck the spun yarn 10 by the suction air flow generated from the blower box 80. The suction nozzle 44 is connected to a not-illustrated dust box installed in the blower box 80 in order to discard the yarn waste through an appropriate pipe. In the present embodiment, the yarn removing device 65 that removes the unnecessary spun yarn 10 is configured by a combination of the yarn removing lever 28 provided in the yarn storage device 12 and the suction nozzle 44 provided in the yarn joining cart 3. Has been.

  Next, the operation of the yarn removing device 65 removing the spun yarn 10 stored in the yarn storage device 12 will be specifically described.

  FIG. 2 shows a normal state in the spinning unit 2 where the pneumatic spinning device 9 generates the spun yarn 10 and winds it on the package 45 by the winding device 13. In this state, the unit controller 60 controls the sliver 15 to be drafted by the draft device 7 and supplied to the pneumatic spinning device 9, and performs spinning by the pneumatic spinning device 9 to generate the spun yarn 10. Control. Hereinafter, the operation of the draft device 7 in the normal state shown in FIG. 2 may be referred to as a normal spinning operation.

  As will be described later, the draft ratio of the draft device 7 during the normal spinning operation depends on the thickness set by the input unit 32 of the machine control device 30 as the thickness of the spun yarn 10 generated during the normal spinning operation. Determined. The spun yarn 10 delivered from the pneumatic spinning device 9 passes through the yarn quality monitoring device 52 and is inspected for the presence or absence of yarn defects. Thereafter, the spun yarn 10 is sent to the yarn storage device 12.

  The unit controller 60 controls the thread removal lever 28 to be held at the lowered position in the normal state shown in FIG. Accordingly, the spun yarn 10 is temporarily stored in the yarn storage roller 21 while being guided by the yarn hooking member 22. The storage amount of the spun yarn 10 in the yarn storage roller 21 is appropriately adjusted by appropriately controlling the winding speed of the package 45 in the winding device 13. The spun yarn 10 unwound from the yarn accumulating roller 21 is wound around the package 45 by the winding device 13.

  When the yarn quality monitoring device 52 detects that the spun yarn 10 has a yarn defect, the yarn quality monitoring device 52 transmits a yarn defect detection signal to the unit controller 60. Upon receipt of the yarn defect detection signal, the unit controller 60 cuts the spun yarn 10 by stopping spinning by the pneumatic spinning device 9 and further stops the operation of the draft device 7 and the like. After the spinning is stopped, the unit controller 60 performs control so that the spun yarn 10 is removed from the yarn accumulating roller 21 by rotating or reversing the yarn accumulating roller 21. As a result, the spun yarn 10 is not stored in the yarn storage roller 21 at all.

  Thereafter, the unit controller 60 sends a control signal to the yarn splicing carriage 3 to travel to the spinning unit 2. Thereafter, the unit controller 60 drives the draft device 7 and the air spinning device 9 again. Hereinafter, the operation of the draft device 7 at this time may be referred to as a spinning resuming operation.

  During the normal spinning operation, the spinning unit 2 generates the spun yarn 10 having the thickness set by the input unit 32. During the spinning resumption operation, the spinning unit 2 generates the middle yarn (for example, 30 yarn) of the spun yarn 10 regardless of the setting in the input unit 32 for the reason described later. Therefore, for example, when the input unit 32 is set to generate the spun yarn 10 of the fine count, the draft ratio of the draft device 7 is set to the draft ratio corresponding to the fine count during the normal spinning operation. On the other hand, during the spinning resuming operation, the draft ratio of the draft device 7 is changed to a predetermined draft ratio, and the middle (specifically, 30th) spun yarn 10 is generated ( First mode). On the other hand, when the input unit 32 is set to generate the middle yarn (30 yarn), the draft ratio of the draft device 7 is medium during both the normal spinning operation and the spinning resumption operation. A draft ratio corresponding to the count is set (second mode). Details of the control of the draft ratio will be described later.

  After the spinning resumption operation is started, the yarn end (upper yarn) of the spun yarn 10 delivered from the pneumatic spinning device 9 is sucked and captured by the suction nozzle 44 rotated upward as shown in FIG. The Thereafter, the suction nozzle 44 is rotated downward, and the upper thread is guided to the splicer 43 as shown in FIG. Accordingly, the spun yarn 10 drawn out from the air spinning device 9 is hung on the yarn hooking member 22 as shown in FIG. 7, and the spun yarn 10 is rotated by the rotating yarn hooking member 22 as shown in FIG. It is rolled up by 21.

  At substantially the same time (may be before or after), the unit controller 60 reverses the package 45 by a reversing device (not shown) and unwinds the lower thread from the package 45, as shown in FIG. The lower thread is sucked and captured by the suction mouse 46 rotated downward. Thereafter, the suction mouse 46 is rotated upward as shown in FIG. 7, and the lower thread is guided to the splicer 43.

  When a predetermined time elapses after the spun yarn 10 starts to be wound around the yarn accumulating roller 21 and the spun yarn 10 having a length longer than the necessary minimum accumulated amount is stored in the yarn accumulating roller 21, the unit controller 60 The draft device 7 is controlled so that the fiber bundle 8 is drafted at the draft ratio during the spinning operation. That is, in the draft device 7, the above-described spinning resuming operation is completed and switched to the normal spinning operation. Thereby, normal spinning by the air spinning device 9 is started. At this time, since the spun yarn 10 having a length longer than the necessary minimum reserving amount is wound around the yarn accumulating roller 21, the spun yarn 10 is pulled out from the pneumatic spinning device 9 with a stable tension and speed. Therefore, stable spinning is performed in the pneumatic spinning device 9.

  Even if the spun yarn 10 of the normal quality starts to be generated as described above in the pneumatic spinning device 9, the spun yarn 10 having a thickness different from the normal generated by the spinning resumption operation is provided in the yarn storage roller 21, or However, the spun yarn 10 having the same thickness as usual (generated before the spun yarn 10 having the minimum necessary storage amount is wound around the yarn storage roller 21) is unstable. Therefore, the unit controller 60 controls the yarn removal lever 28 to move to the raised position as shown in FIG. 9 immediately before switching to the normal spinning operation. As a result, the spun yarn 10 wound around the yarn accumulating roller 21 is unwound from the yarn accumulating roller 21, sucked by the suction nozzle 44, and discarded. As described above, in the present embodiment, the spun yarn 10 generated during the spinning resumption operation is removed by the suction nozzle 44 that guides the upper yarn to the splicer 43, so that the configuration of the spinning machine 1 can be simplified. .

  After all the spun yarn 10 to be removed is unwound from the yarn accumulating roller 21, the unit controller 60 controls the yarn removing lever 28 to move to the lowered position as shown in FIG. As a result, the spun yarn 10 comes into contact with the yarn hooking member 22, and the storage amount of the spun yarn 10 in the yarn storage roller 21 increases.

  Thereafter, the upper thread and the lower thread are spliced by the splicer 43. Thereafter, the normal state shown in FIG. 2 is restored, and the winding of the spun yarn 10 around the package 45 is resumed.

  Next, control of the draft ratio in the draft device 7 and control of the yarn removal lever 28 related to the control will be described in detail.

  In the spinning machine 1 of the present embodiment, the fiber bundle 8 drafted at a predetermined draft ratio is pneumatically spun from the draft device 7 so that the middle yarn (for example, 30 yarn) spun yarn 10 is generated during the spinning resumption operation. It supplies to the apparatus 9, and it is comprised so that the spun yarn 10 may be produced | generated reliably. Specifically, if the amount of fibers supplied to the air spinning device 9 is too small, it is difficult to obtain sufficient fiber bundling, and the spun yarn 10 has a strength that can withstand the generated spun yarn 10 being sent downstream. Is not provided, the generation of the spun yarn 10 may fail. If the amount of fibers supplied to the air spinning device 9 is too large, the fibers may be clogged in the opening (inlet) of the air spinning device 9 and the production of the spun yarn 10 may fail. Therefore, in the spinning machine 1 of the present embodiment, the draft ratio in the draft device 7 is controlled by the unit controller 60 so that the pneumatic spinning device 9 generates the medium-number spun yarn 10 during the spinning resumption operation.

  The thickness of the spun yarn 10 generated by the pneumatic spinning device 9 during normal spinning operation (in other words, the draft ratio at which the draft device 7 stretches the fiber bundle 8) is set by the operator appropriately operating the input unit 32. Can do. When it is set to generate a yarn 10 that is thinner or thicker than the middle yarn during the normal spinning operation, the draft device 7 drafts the fiber bundle 8 at a draft ratio different from that during the normal spinning operation. To be controlled (first mode). When it is set to generate the middle number of spun yarns 10 during the normal spinning operation, the draft device 7 drafts the fiber bundle 8 at the same draft ratio during both the normal spinning operation and the spinning resuming operation. (Second mode).

  In the first mode described above, since the thickness of the spun yarn 10 generated during the spinning resumption operation is different from that during the normal spinning operation, the portion of the spun yarn 10 having a different thickness is reliably removed and the winding device 13 Resume winding. Thereby, the quality of the spun yarn 10 wound around the package 45 can be kept constant. In the second mode, the thickness of the spun yarn 10 is the same during the spinning resumption operation and during the normal spinning operation, so the portion where the spun yarn 10 should be removed may be shorter than in the first mode.

  In the spinning machine 1 according to the present embodiment, the length of the spun yarn 10 that the yarn removing device 65 removes from the yarn accumulating roller 21 depends on whether the draft device 7 is operated in the first mode or the second mode. It is configured to be changeable. Specifically, when the draft device 7 operates in the second mode, the unit controller 60 removes the spun yarn 10 that the yarn removing device 65 removes from the yarn storage roller 21 as compared to the case where the draft device 7 operates in the first mode. Reduce the length of. That is, when the spinning yarn 10 has the same thickness during the spinning resumption operation and during the normal spinning operation, a spun yarn 10 having a thickness different from that during the normal spinning operation is generated during the spinning resumption operation. As compared with the above, the length of the spun yarn 10 which is unwound and removed from the yarn accumulating roller 21 is shortened. As a result, the spun yarn 10 can be prevented from being removed more than necessary, and the amount of yarn waste generated can be reduced. Since the time required for removing the spun yarn 10 can also be reduced, the cycle time can be shortened.

  In the present embodiment, the change in the length of the spun yarn 10 to be removed from the yarn accumulating roller 21 is realized by changing the length of time that the yarn removal lever 28 is positioned at the raised position. The unit controller 60 can control the length of time for which the yarn removal lever 28 is in the raised position. In this way, by changing the length of time that the yarn removing lever 28 is located at the raised position (in other words, the length of time for removing the yarn that is the time when the yarn removing lever 28 performs the yarn removing operation), The change of the length of the spun yarn 10 removed from the yarn accumulating roller 21 can be realized by simple control.

  As described above, the spinning machine 1 according to this embodiment includes the draft device 7, the air spinning device 9, the yarn accumulating roller 21, the yarn removing device 65, and the unit controller 60. The draft device 7 drafts the fiber bundle 8. The air spinning device 9 generates a spun yarn 10 by twisting the fiber bundle 8 drafted by the draft device 7 by an air flow by the spinning resuming operation and the normal spinning operation performed after the spinning resuming operation. The yarn storage roller 21 rotates in a state where the spun yarn 10 is wound around and stored. The yarn removing device 65 removes the spun yarn 10 stored in the yarn storage roller 21. The unit controller 60 can change the length of the spun yarn 10 that the yarn removing device 65 removes from the yarn accumulating roller 21 in accordance with the draft ratio during the spinning resumption operation.

  As a result, the yarn removing device 65 removes the spun yarn 10 of an appropriate length from the yarn accumulating roller 21 depending on whether the draft ratio during the spinning resumption operation is different from or the same as the draft ratio during the normal spinning operation. Can be removed. For example, when the draft ratio during the spinning resumption operation is the same as the draft ratio during the normal spinning operation, the need to remove the spun yarn 10 by the yarn removing device 65 is reduced. Therefore, by changing the length of the spun yarn 10 to be removed according to the situation as described above, the spun yarn 10 is not removed more than necessary, and the amount of yarn waste can be reduced.

  In the spinning machine 1 of the present embodiment, the draft device 7 includes a first mode in which the fiber bundle 8 is drafted at different draft ratios during the spinning resumption operation and the normal spinning operation, and during the spinning resumption operation and the normal spinning operation. And the second mode in which the fiber bundle 8 is drafted at the same draft ratio. The unit controller 60 performs spinning that the yarn removing device 65 removes from the yarn accumulating roller 21 after the end of the spinning resumption operation depending on whether the draft device 7 is drafting the fiber bundle 8 in the first mode or the second mode. Control is performed to change the length of the yarn 10.

  Thereby, the operation | movement which changes the length of the spun yarn 10 which the yarn removal apparatus 65 removes from the yarn storage roller 21 according to the draft ratio at the time of a spinning resumption operation | movement is realizable by simple control.

  The spinning machine 1 according to the present embodiment further includes a yarn hooking member 22. The yarn hooking member 22 is rotatably provided with respect to the yarn accumulating roller 21 and can guide the spun yarn 10. The yarn removing device 65 includes a yarn removing lever 28. The yarn removing lever 28 can perform a yarn removing operation to remove the spun yarn 10 from the yarn hooking member 22 by moving. The unit controller 60 can change the operating time length for the yarn removing lever 28 to perform the yarn removing operation depending on whether the draft device 7 is operating in the first mode or the second mode.

  Thereby, the length of the spun yarn 10 to be removed can be easily changed by changing the operating time length of the yarn removing lever 28.

  In the spinning machine 1 of the present embodiment, the unit controller 60 determines that the operation time length of the yarn removal lever 28 when the first mode is executed is the operation time of the yarn removal lever 28 when the second mode is executed. It is possible to control the yarn removing operation so as to be longer than the time length.

  As a result, when the first mode is executed, the spun yarn 10 can be removed longer, and when the second mode is executed, the spun yarn 10 can be removed shorter. As a result, the amount of yarn waste when the second mode is executed can be reduced.

  The spinning machine 1 of the present embodiment includes a draft device 7, an air spinning device 9, a yarn accumulating roller 21, a yarn hooking member 22, a yarn removing lever 28, a yarn removing device 65, and a unit controller 60. Prepare. The draft device 7 performs a draft for stretching the fiber bundle 8. The pneumatic spinning device 9 performs spinning to produce a spun yarn 10 by twisting the fiber bundle 8 drafted by the draft device 7 by an air flow. The yarn storage roller 21 rotates and stores the spun yarn 10 wound around it. The yarn hooking member 22 is rotatably provided with respect to the yarn accumulating roller 21 and can guide the spun yarn 10. The yarn removing lever 28 can perform a yarn removing operation for removing the spun yarn 10 from the yarn hooking member 22. The yarn removing device 65 includes a suction nozzle 44 having a suction port for sucking and capturing the spun yarn 10. The unit controller 60 controls the thread removal lever 28. The thread removal lever 28 is movable to a raised position that is a position when performing a thread removal operation and a lowered position that is retracted from the raised position. The unit controller 60 can change the length of time that the thread removal lever 28 is located at the raised position.

  Accordingly, the spun yarn 10 having an appropriate length can be removed from the yarn accumulating roller 21 by changing the length of time during which the yarn removing lever 28 is located at the raised position. As a result, the amount of yarn waste can be reduced with simple control.

  In the spinning machine 1 of the present embodiment, when the thickness of the spun yarn 10 generated by the pneumatic spinning device 9 during normal spinning operation is fine (for example, 40th, first thickness), the draft device 7 The fiber bundle 8 is drafted in the first mode so that the thickness of the fiber bundle 8 supplied to the spinning device 9 becomes thicker during the spinning resumption operation than during the normal spinning operation. When the thickness of the spun yarn 10 generated by the pneumatic spinning device 9 during normal spinning operation is medium (that is, the second thickness larger than the first thickness), the draft device 7 performs the fiber bundle in the second mode. Draft 8

  Thus, even when the thin spun yarn 10 is generated during the normal spinning operation, the spun yarn 10 is reliably generated by making the draft ratio during the spinning resumption operation different from the draft ratio during the normal spinning operation. start.

  In the spinning machine 1 of the present embodiment, when the thickness of the spun yarn 10 generated by the pneumatic spinning device 9 during the normal spinning operation is medium (second thickness), the draft device 7 performs the fiber operation in the second mode. Draft the bundle 8. When the thickness of the spun yarn 10 generated by the pneumatic spinning device 9 during the normal spinning operation is thick (that is, the third thickness larger than the second thickness), the draft device 7 supplies the pneumatic spinning device 9 The fiber bundle 8 is drafted in the first mode so that the thickness of the fiber bundle 8 is thinner during the spinning resumption operation than during the normal spinning operation. Specifically, in this case, for example, the first mode is executed by driving the draft device 7 so that the rotation speed of the back roller pair 16 is lower during the spinning resumption operation than during the normal spinning operation.

  Thus, even when the thick spun yarn 10 is generated during the normal spinning operation, the spun yarn 10 is reliably generated by making the draft ratio during the spinning resumption operation different from the draft ratio during the normal spinning operation. start.

  The spinning machine 1 according to the present embodiment includes a winding device 13 and a splicer 43. The winding device 13 winds the spun yarn 10 around the package 45. The splicer 43 is disposed at a position between the air spinning device 9 and the winding device 13 in the traveling direction of the spun yarn 10 and from the yarn end of the spun yarn 10 (upper yarn) from the air spinning device 9 and the winding device 13. The spun yarn 10 (bottom yarn) is spliced to the yarn end. The yarn removing device 65 sucks the spun yarn 10 removed from the yarn accumulating roller 21 and removes at least the spun yarn 10 generated by the air spinning device 9 when the draft device 7 resumes spinning. The yarn removing device 65 sucks and captures the spun yarn 10 from the pneumatic spinning device 9 and guides it to the splicer 43 during the spinning resumption operation.

  As a result, the spun yarn 10 generated from the fiber bundle 8 drafted at a draft ratio different from that during the normal spinning operation is removed from the spun yarn 10 generated by the normal spinning operation, and then splicing is performed. Since 10 can be wound up, a high-quality package 45 can be formed. Moreover, since the spun yarn 10 as described above is removed by the yarn removing device 65, the configuration of the spinning machine 1 can be simplified.

  The spinning machine 1 according to the present embodiment directly draws the spun yarn 10 from the pneumatic spinning device 9 by the yarn accumulating roller 21.

  As a result, the spun yarn 10 can be stored while being pulled out from the pneumatic spinning device 9 with a stable tension. “Directly pulling out” means that there is no other configuration between the pneumatic spinning device 9 and the yarn accumulating roller 21 such as a delivery roller and a nip roller that draws the spun yarn 10 from the pneumatic spinning device 9.

  The spinning machine 1 according to the present embodiment further includes an input unit 32. The input unit 32 can set the thickness of the spun yarn 10 generated by the pneumatic spinning device 9 and / or the spinning speed for generating the spun yarn 10 from the pneumatic spinning device 9.

  As a result, the spun yarn 10 having an appropriate length can be removed according to the draft ratio during the spinning resumption operation only by a simple operation at the input unit 32.

  Next, a modified example of the present invention will be described. In the description of this modification, the same or similar members as those in the above-described embodiment may be denoted by the same reference numerals in the drawings, and description thereof may be omitted.

  In this modification, according to the spinning speed set by the input unit 32, the operating time length of the yarn removing operation by the yarn removing lever 28 is changed in conjunction with the set spinning speed (thread removing operation). The unit controller 60 controls the operation of the yarn removing lever 28 so that the operation time length of the yarn is approximately inversely proportional to the spinning speed. In other words, even in the same first mode, when the spinning speed of the pneumatic spinning device 9 exceeds the predetermined speed, the unit controller 60 performs the yarn removal operation of the yarn removal lever 28 for a short time (first time length) during the spinning restart operation. If the speed falls below the predetermined speed, the unit controller 60 controls the yarn removing operation to be performed for a long time (second time length longer than the first time length). The unit controller 60 performs the same control in the second mode. With this control, even if the spinning speed of the pneumatic spinning device 9 is different, an appropriate amount of the spun yarn 10 can be removed during the spinning resuming operation.

  In the spinning machine 1 of the present modification, the unit controller 60 removes the spun yarn 10 over the first time length when the spinning speed at which the pneumatic spinning device 9 generates the spun yarn 10 is faster than a predetermined speed. The yarn removing device 65 is controlled. When the spinning speed is slower than the predetermined speed, the unit controller 60 controls the yarn removing device 65 so as to remove the spun yarn 10 over a second time length longer than the first time length.

  Thereby, when the spinning speed is high, the time for removing the spun yarn 10 can be shortened, and when the spinning speed is slow, the time for removing the spun yarn 10 can be lengthened. As a result, even if the spinning speed is different, a certain amount of spun yarn 10 can be removed during the spinning resumption operation.

  The preferred embodiment of the present invention has been described above, but the above configuration can be modified as follows, for example.

  The draft ratio of the draft device 7 at the time of the spinning resumption operation is not limited to the draft ratio for generating the spun yarn 10 corresponding to the middle count as in the above embodiment, but the configuration of the pneumatic spinning device 9 and the like It can be changed as appropriate in consideration.

  In the above embodiment, the middle roller pair 19 and the front roller pair 20 of the draft device 7 are driven by an electric motor common to the plurality of spinning units 2. Therefore, the draft ratio of the draft device 7 is changed by changing the rotational speeds of the back roller pair 16 and the third roller pair 17. However, the middle roller pair 19 and the front roller pair 20 can also be configured to be driven independently for each spinning unit 2. In this case, the draft ratio of the draft device 7 can be changed by changing the rotation speed of the middle roller pair 19 and / or the front roller pair 20.

  In the above modification, the unit controller 60 controls the operation time length of the yarn removing operation by the yarn removing lever 28 according to both the draft ratio and the spinning speed. However, the unit controller 60 may control the operation time length of the yarn removing operation according to the spinning speed regardless of the draft ratio. Further, the operation time length of the yarn removing operation may be controlled according to another parameter that is neither the draft ratio nor the spinning speed.

  In the embodiment and the modification described above, each device constituting the spinning unit 2 such as the draft device 7 and the air spinning device 9 is controlled by the unit controller 60 provided in each spinning unit 2. The unit controller 60 may be provided for each predetermined number of spinning units 2. Further, some or all of the devices may be controlled by the machine control device 30. The yarn splicing cart 3 may be provided with a cart control unit, and each device of the yarn splicing cart 3 may be controlled by the cart control unit that receives the control signal from the unit controller 60 or the machine control device 30.

  In the embodiment and the modification described above, the lifting arm 47 and the pneumatic cylinder 49 are provided on the yarn joining carriage 3 as means for driving the yarn removing lever 28. For example, each spinning unit 2 drives the yarn removing lever 28. The structure for this may be provided. Instead of the pneumatic cylinder 49, the thread removal lever 28 may be moved by an appropriate structure such as a rack and pinion mechanism or a cam mechanism.

  In the embodiment and the modification described above, the yarn accumulating roller 21 is driven by the magnetic means provided between the yarn accumulating roller 21 and the yarn hooking member 22 to drive the electric motor 25 provided in the yarn accumulating roller 21. 21 and the yarn hooking member 22 are configured to be able to rotate integrally. However, instead of this configuration, each of the yarn accumulating roller 21 and the yarn hooking member 22 may be driven by a dedicated motor.

  In the embodiment and the modification described above, the generation of the spun yarn 10 in the pneumatic spinning device 9 causes the swirling airflow generating nozzle to operate during normal spinning operation, and the swirling airflow generating nozzle and auxiliary nozzle to operate during spinning resuming operation. It is configured. During the normal spinning operation, in addition to the operation of the swirling air flow generating nozzle, the auxiliary nozzle may be configured to operate in a weaker state than during the spinning resumption operation.

  In the embodiment and the modification described above, when the yarn quality monitoring device 52 detects a yarn defect, the spun yarn 10 is cut by stopping the spinning in the pneumatic spinning device 9. You may comprise so that the spun yarn 10 may be cut | disconnected with the cutter provided in this position.

  Although the splicer 43 is provided in the spinning machine 1 as a yarn splicing device in the above embodiment, a knotter may be provided instead of the splicer 43, for example.

1 Spinning machine (spinning machine)
7 Draft device 9 Pneumatic spinning device 10 Spinning yarn 13 Winding device 21 Yarn accumulating roller 22 Yarn hooking member 28 Yarn releasing lever (yarn releasing member)
32 Input section (setting section)
43 Splicer (yarn splicing device)
44 Suction nozzle (thread removal member)
45 package 60 unit controller (control unit)
65 Yarn removal device

Claims (11)

A draft device for drafting fiber bundles;
An air spinning device that generates a spun yarn by twisting the fiber bundle drafted by the draft device by an air flow by a spinning resumption operation and a normal spinning operation performed after the spinning resumption operation;
A yarn storage roller that rotates in a state where the spun yarn is wound around and stored, and
A yarn removing device for removing the spun yarn stored in the yarn storage roller;
A control unit capable of changing the length of the spun yarn that the yarn removing device removes from the yarn accumulating roller according to the draft ratio during the spinning resumption operation;
A spinning machine characterized by comprising: The spinning machine according to claim 1,
The draft device has a first mode in which the fiber bundle is drafted at different draft ratios during the spinning resumption operation and the normal spinning operation, and at the same draft ratio during the spinning resumption operation and during the normal spinning operation. Drafting the fiber bundle in any of a second mode for drafting the fiber bundle;
The control unit determines whether the yarn removing device removes the yarn accumulating roller from the yarn accumulating roller after the spinning resuming operation, depending on whether the draft device is drafting the fiber bundle in the first mode or the second mode. A spinning machine that is controlled to change the length of the spun yarn to be removed. The spinning machine according to claim 2,
A yarn hooking member provided rotatably with respect to the yarn accumulating roller and capable of guiding the spun yarn;
The yarn removing device includes a yarn removing member capable of performing a yarn removing operation by moving the spun yarn from the yarn hooking member by moving,
The control unit is capable of changing an operation time length in which the yarn removing member performs the yarn removing operation depending on whether the draft device is operating in the first mode or the second mode. Spinning machine characterized by The spinning machine according to claim 3, wherein
In the control unit, the operation time length of the thread removal member when the first mode is executed is longer than the operation time length of the thread removal member when the second mode is executed. The spinning machine is characterized by controlling the yarn removing operation as described above. A drafting device for drafting a fiber bundle;
An air spinning device for spinning to produce a spun yarn by twisting the fiber bundle drafted by the draft device by an air flow;
A yarn storage roller that winds and stores the spun yarn around by rotating,
A yarn hooking member provided rotatably with respect to the yarn storage roller and capable of guiding the spun yarn;
A yarn removing device having a yarn removing member capable of performing a yarn removing operation for removing the spun yarn from the yarn hooking member, and a yarn removing member having a suction port for sucking and capturing the spun yarn;
A control unit for controlling the thread removing member;
With
The thread removal member is movable to a thread removal position that is a position when performing the thread removal operation, and a retracted position that is retracted from the thread removal position,
The spinning machine according to claim 1, wherein the control unit is capable of changing a length of time that the yarn removing member is located at the yarn removing position. The spinning machine according to any one of claims 2 to 4,
When the thickness of the spun yarn generated by the pneumatic spinning device during the normal spinning operation is the first thickness, the draft device is configured such that the thickness of the fiber bundle supplied to the pneumatic spinning device is the normal spinning. Draft the fiber bundle in the first mode so that it is thicker at the time of the spinning restart operation than at the time of operation,
When the thickness of the spun yarn generated by the pneumatic spinning device during the normal spinning operation is a second thickness that is thicker than the first thickness, the drafting device takes the fiber bundle in the second mode. A spinning machine characterized by drafting. The spinning machine according to claim 2, 3, 4, or 6,
When the thickness of the spun yarn generated by the pneumatic spinning device during normal spinning operation is the second thickness, the draft device drafts the fiber bundle in the second mode,
When the thickness of the spun yarn generated by the pneumatic spinning device during the normal spinning operation is a third thickness larger than the second thickness, the draft device is supplied to the pneumatic spinning device. A spinning machine characterized in that the fiber bundle is drafted in the first mode so that the thickness of the fiber bundle becomes thinner during the spinning resumption operation than during the normal spinning operation. The spinning machine according to any one of claims 1 to 7,
The controller is
If the spinning speed at which the pneumatic spinning device produces the spun yarn is faster than a predetermined speed, the yarn removing device is controlled to remove the spun yarn over a first time length;
When the spinning speed is slower than the predetermined speed, the spinning machine controls the yarn removing device so as to remove the spun yarn over a second time length longer than the first time length. The spinning machine according to any one of claims 1 to 8,
A winding device for winding the spun yarn around a package;
In the traveling direction of the spun yarn, at a position between the pneumatic spinning device and the winding device, a yarn end of the spun yarn from the pneumatic spinning device and a yarn end of the spun yarn from the winding device A yarn splicing device for splicing,
With
The yarn removing device sucks the spun yarn removed from the yarn accumulating roller, removes at least the spun yarn generated by the pneumatic spinning device during the spinning resuming operation of the draft device, and transfers it to the yarn joining device. A spinning machine characterized by guiding. The spinning machine according to any one of claims 1 to 9,
A spinning machine, wherein the spun yarn is directly pulled out from the pneumatic spinning device by the yarn accumulating roller. The spinning machine according to any one of claims 1 to 10,
The spinning machine further comprising a setting unit that sets at least one of a thickness and a spinning speed of the spun yarn generated by the pneumatic spinning device.

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