JP2019104596A - Yarn winding machine and yarn winding method - Google Patents

Abstract

To provide a yarn winding machine and a yarn winding method capable of quickly reducing the increased storage amount in a yarn storage device before a start of winding of a package in a winding device.SOLUTION: A spinning machine 1 is provided with: an air spinning device 4 for generating a yarn Y with airflow; a winding device 20 for winding the yarn Y generated by the air spinning device 4 to form a package P; a yarn storage device 6 arranged between the air spinning device 4 and the winding device 20 to temporarily store the yarn Y sent out from the air spinning device 4 and send the yarn Y to the winding device 20; a motor 28 for driving a drum 23 for rotating the package P in the winding device 20; and a control unit 90 which controls the motor 28 to execute, after a start of winding of the package P, a storage amount reduction control C for accelerating the rotation speed of the motor 28 until reaching a first specified speed V2 which is equal to or higher than a storage amount decrease speed V1 capable of reducing the storage amount of the yarn storage device 6.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a yarn winding machine and a yarn winding method.

  In a yarn winding process of a spinning machine (yarn winding machine), control of winding tension is performed using a yarn storage device. For example, Patent Document 1 discloses a spinning machine (air spinning) in which a yarn generated by a spinning device is stored in a yarn storage device (a yarn slack removing device) to take up slack of the yarn while taking up as a package by a winding device. Apparatus) is disclosed. In this spinning machine, when it is detected that the slack removal amount (storage amount) of the yarn storage device is smaller than a predetermined amount, the package is separated from the rotating drum to reduce the winding speed and increase the slack removal amount.

Unexamined-Japanese-Patent No. 2004-277949

  In a yarn winding machine provided with such a yarn storage device, it is preferable to keep the storage amount of the yarn storage device as constant as possible and keep the tension constant. In particular, at the start of winding of the winding device after the yarn has been cut or after the bobbin has been replaced, the storage amount of the yarn in the yarn storage device increases, so there is a demand to reduce the storage amount as fast as possible. is there.

  Therefore, an object of the present invention is to provide a yarn winding machine and a yarn winding method capable of rapidly reducing the storage amount of the yarn storage device which has increased before the start of winding of a package in the winding device. .

  A yarn winding machine according to the present invention comprises an air spinning device for producing a yarn by an air flow, a winding device for winding a yarn produced by the air spinning device to form a package, an air spinning device and a winding device A yarn storage device disposed between the two and temporarily storing the yarn delivered from the pneumatic spinning device and delivering it to the take-up device, a drive unit for rotating the package in the take-up device, and a drive unit , Storage volume reduction control that accelerates the rotational speed of the drive unit to a first specified speed that is equal to or higher than the storage volume reduction rate that can reduce the storage volume of yarn in the yarn storage device after winding of the package starts. And a control unit to execute.

  In the yarn winding machine of this configuration, since the storage amount reduction control is executed by controlling the drive unit, the storage amount increased when the package rotation in the winding device is started can be reduced rapidly.

  In the yarn winding machine according to the present invention, the drive unit may rotate only one package. In other words, in the yarn winding machine according to the present invention, one drive unit is provided for each winding device. In the yarn winding machine of this configuration, since rotation of one package is controlled by one drive unit, storage amount reduction control can be executed more precisely.

  In the yarn winding machine according to the present invention, the winding device has a roller that rotates in contact with the outer peripheral surface of the package during winding of the package, and the control unit makes the roller and the package contact with each other. Storage reduction control may be performed. In the yarn winding machine of this configuration, since the contact pressure always acts on the yarn wound on the package, it is possible to produce a package without unevenness in tension.

  The yarn winding machine according to the present invention further includes a yarn joining device for joining the yarn produced by the pneumatic spinning device and the yarn wound by the winding device, and the control unit terminates the yarn joining operation in the yarn joining device. At the same time or after the end, storage volume reduction control may be performed. The increased storage amount can be rapidly reduced by stopping the winding of the winding device for the yarn joining operation.

  In the storage volume reduction control of the yarn winding machine according to the present invention, after accelerating the rotational speed of the drive unit to the first specified speed, the drive unit may be controlled to maintain the first specified speed. . Even if acceleration of the rotational speed of the drive unit is continued, even if the rotational speed is reduced, the response speed of the drive unit or the like may cause the drive unit not to be decelerated before the storage amount is exhausted. In the yarn winding machine of this configuration, since the acceleration is limited at a predetermined speed, it is possible to prevent the storage amount from being lost.

  In the storage volume reduction control of the yarn winding machine according to the present invention, after accelerating the rotational speed of the drive unit to the first specified speed, the storage volume of the yarn in the yarn storage device can be maintained at a certain range. The rotational speed of the drive unit may be decelerated until the second predetermined speed is reached. In this configuration, after rapidly reducing the amount of storage that has increased when the rotation of the winding device is stopped, it is possible to reduce the amount of fluctuation in the amount of storage. As a result, since the tension of the yarn in the package is kept constant, the quality of the package can be improved.

  The yarn winding machine according to the present invention further includes a first detection unit that detects the storage amount of yarn stored in the yarn storage device, and the control unit stores the storage amount based on the detection of the yarn in the first detection unit. The storage amount reduction control may be ended when it is determined that the amount has become equal to or less than the predetermined amount. In this configuration, the storage amount reduction control can be ended at an appropriate timing, and thereafter, the fluctuation of the storage amount can be suppressed. As a result, the tension of the yarn in the package can be easily maintained constant, and the quality of the package can be improved. Furthermore, it can be reliably avoided that the storage amount is lost.

  In the yarn winding machine according to the present invention, the control unit may control the drive unit to increase the yarn storage amount in the yarn storage device later than the second prescribed speed after the storage amount reduction control ends. First control that accelerates to the second specified speed after decelerating the rotational speed of the drive unit until it reaches the third specified speed below the possible storage increase speed, and the stored quantity decreases faster than the second specified speed A second control may be repeatedly performed to accelerate the rotational speed of the drive unit to a fourth specified speed that is equal to or higher than the speed and then reduce the speed to the second specified speed. In the yarn winding machine of this configuration, the storage amount can be maintained in a certain range.

  The yarn winding machine according to the present invention further includes a second detection unit that detects the storage amount of yarn stored in the yarn storage device, and the control unit stores the storage amount based on the detection of the yarn in the second detection unit. If it is determined that the second predetermined amount is reached, the rotational speed of the drive unit is accelerated until the second predetermined speed is reached, and the storage amount is smaller than the second predetermined amount based on the detection of the yarn in the second detection unit If it is determined that the amount is less than the fixed amount, the rotational speed of the drive unit may be reduced to the second specified speed. In this configuration, since the rotational speed of the drive unit is accelerated or decelerated to the second prescribed speed at an appropriate timing, it is possible to suppress the fluctuation of the storage amount.

  In the first control of the yarn winding machine according to the present invention, the rotational speed of the drive unit is decelerated until the preset lower limit speed value is reached, and in the second control, the drive is driven until the preset upper limit speed value is reached. The rotational speed of the part may be accelerated. In this configuration, it is possible to prevent the storage amount from increasing excessively and to prevent the storage amount from being lost.

  In the yarn winding machine according to the present invention, the control unit may execute at least one of the deceleration of the rotational speed of the drive unit in the first control and the acceleration of the rotational speed of the drive unit in the second control in stages. . When the deceleration in the first control and the acceleration in the second control are performed linearly without being performed stepwise, the speed difference before and after the deceleration and before and after the acceleration may be too large. In this case, the package may slip relative to the roller, and the storage amount may not be accurately controlled. In the yarn winding machine of this configuration, the deceleration in the first control or the acceleration in the second control is performed stepwise, so the occurrence of the slip as described above can be avoided and the storage amount can be accurately controlled.

  In the yarn winding machine according to the present invention, the change of the rotational speed of the drive unit from the speed decelerated in the first control or the speed accelerated in the second control to the second specified speed is performed not linearly but linearly. May be In the yarn winding machine of this configuration, after the execution of the first control or the second control, the state of control of the drive unit is rapidly shifted to a state in which the fluctuation amount of the storage amount decreases, so the fluctuation of the storage amount is suppressed be able to.

  In the yarn winding machine according to the present invention, the first prescribed speed in the storage amount reduction control may be constant regardless of the size of the diameter of the package. In other words, the drive unit may have a torque that can rotate the package at the first predetermined speed even if the diameter of the package is increased. In the yarn winding machine of this configuration, the storage amount of the yarn storage device can be reduced by simple control.

  The yarn winding machine according to the present invention further includes a drafting device for drafting a fiber bundle supplied to the pneumatic spinning device, and the pneumatic spinning device includes a fiber guiding portion for guiding the fiber bundle sent out from the drafting device; It may have a spinning chamber in which the fibers of the fiber bundle guided from the section are swirled by a swirling flow, and a hollow guide shaft body for guiding the fiber swirled in the spinning chamber to the outside. In this configuration, the yarn may be continuously delivered before the start of winding of the package in the winding device, and the storage amount of the yarn storage device may increase. However, even in this case, the increased storage amount Can be reduced quickly.

  A yarn winding method according to the present invention includes an air spinning device that generates a yarn by an air flow, a winding device that winds a yarn generated by the air spinning device to form a package, an air spinning device, and a winding device. And a yarn storage device for temporarily storing the yarn delivered from the pneumatic spinning device and delivering it to the winding device, and a drive unit for rotating the package in the winding device. A yarn winding method to be carried out, wherein the drive section reaches a first prescribed speed that is equal to or higher than the storage volume reduction rate at which the yarn storage volume in the yarn storage device can be reduced after the start of package winding. Accelerate the rotation speed of

  According to this yarn winding method, similarly to the above-described yarn winding machine, it is possible to rapidly reduce the storage amount of the yarn storage device which has increased before the start of winding of the package in the winding device.

  According to the present invention, it is possible to rapidly reduce the storage amount of the yarn storage device which has increased before the start of winding of the package in the winding device.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic block diagram which showed the structure of the spinning machine which is one Embodiment. It is sectional drawing of the pneumatic spinning device of FIG. It is a functional block diagram of the pneumatic spinning device of FIG. It is a figure which shows the rotational speed of the motor controlled by the control part of FIG.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements will be denoted by the same reference symbols, without redundant description.

  As shown in FIG. 1, the spinning machine (yarn winding machine) 1 includes a plurality of spinning units (yarn winding units) 2 and a control unit 90. The plurality of spinning units 2 are arranged in a line. Each spinning unit 2 drafts a sliver (fiber bundle) S to generate a fiber bundle F, twists the fiber bundle F by a swirling flow of air to generate a yarn Y, and winds the yarn Y on a bobbin B Package P is formed. The control unit 90 controls the operation of the spinning machine 1.

  The control unit 90 is configured of, for example, a machine control device and a plurality of unit controllers. The machine control device is a host controller of a plurality of unit controllers. Each unit controller is provided for each predetermined number (one or more) of spinning units 2 and controls the operation of each spinning unit 2. The details of the control in the control unit 90 will be described in detail later.

  Hereinafter, the upstream side in the traveling direction of the sliver S, the fiber bundle F, and the yarn Y is referred to as "upstream side", and the downstream side in the traveling direction is referred to as "downstream side". One side (for example, the work passage side) in the horizontal direction perpendicular to the arrangement direction of the plurality of spinning units 2 is referred to as "front side", and the other side in the horizontal direction is referred to as "rear side". The upper side in the vertical direction is called "upper side", and the lower side in the vertical direction is called "lower side".

  Each spinning unit 2 is wound sequentially with a draft device 3, an air spinning device 4, a yarn monitoring device 5, a yarn storage device (drawer) 6, a yarn joining device 7, from the upstream side toward the downstream side. And a removing device 20. Furthermore, each spinning unit 2 is provided with a first catching and guiding device 8 and a second catching and guiding device 9. As an example, the traveling directions of the sliver S, the fiber bundle F, and the yarn Y from the draft device 3 to the yarn storage device 6 are directions from the front side to the rear side, and are inclined upward with respect to the horizontal direction. The traveling direction of the yarn Y from the yarn storage device 6 to the winding device 20 is a direction from the lower side to the upper side, and is inclined forward with respect to the vertical direction. In each spinning unit 2, the traveling direction of the yarn Y is switched in the yarn storage device 6.

  The drafting device 3 drafts the sliver S to generate a fiber bundle F, and supplies the fiber bundle F to the pneumatic spinning device 4. The draft device 3 has a back roller pair 31, a third roller pair 32, a middle roller pair 33, and a front roller pair 34 in order from the upstream side to the downstream side. An apron belt 35 is stretched around each roller constituting the middle roller pair 33.

  The air spinning device 4 twists the fiber bundle F from the drafting device 3 by a swirling flow to produce a yarn Y. More specifically, the air spinning device 4 has a nozzle block 40 and a hollow guide shaft 50, as shown in FIG. In the nozzle block 40, a swirling flow acts on the fiber bundle F while the fiber bundle F fed from the draft device 3 is guided to the inside. The twisted fiber bundle F passes through the hollow guide shaft 50 and is delivered to the outside. The generation and stop of the swirling flow are controlled by a unit controller.

  The nozzle block 40 has a fiber guide portion 41 and a swirl flow generation portion 42. The fiber guide portion 41 and the swirl flow generation portion 42 may be integrally formed. The fiber guide portion 41 is provided with a guide hole 41 a for guiding the fiber bundle F fed from the draft device 3. The end of the guide hole 41 a on the draft device 3 side is the inlet 41 b of the sliver S. The spinning flow generating unit 42 is provided with a spinning chamber 43 and a plurality of first nozzles 44. In the spinning chamber 43, the tip 45a of the needle 45 held by the fiber guiding portion 41 is located.

  In the spinning chamber 43, the rear end of the fiber of the fiber bundle F introduced through the guide hole 41a is swirled by the swirling flow. In order to generate a swirling flow in the spinning chamber 43, air is jetted from the plurality of first nozzles 44 into the spinning chamber 43. The swirl flow generation unit 42 is provided with an opening 42 a so as to be continuous with the spinning chamber 43. The opening 42a is formed in a truncated cone shape which is tapered toward the upstream side. The needle 45 prevents the twist of the fiber bundle F from being transmitted to the upstream side of the pneumatic spinning device 4. The needle 45 may be omitted, and the downstream end of the fiber guide 41 may have the function of the needle 45.

  The upstream end portion 50a of the hollow guide shaft body 50 is formed in a truncated cone shape which is tapered toward the upstream side, and is disposed in the opening 42a with a gap. The flange-like cap 57 attached to the hollow guide shaft 50 contacts the frame-like holder 46 that supports the nozzle block 40, whereby the hollow guide shaft 50 is positioned with respect to the spinning chamber 43. The air jetted from the plurality of first nozzles 44 into the spinning chamber 43 passes through the gap formed between the upstream end 50 a of the hollow guide shaft 50 and the opening 42 a of the swirling flow generating unit 42. It flows into the decompression chamber 47 provided in the holder 46, and is discharged together with the fiber that has not become the yarn Y.

  The hollow guide shaft body 50 is provided with a passage 51 and a plurality of second nozzles 54. The passage 51 guides the yarn Y (fibers rotated in the spinning chamber 43) to the outside. At the start (resumption) of the generation of the yarn Y, air is jetted from the plurality of second nozzles 54 into the passage 51. The passage 51 extends along the central axis of the hollow guide shaft 50 and is formed to extend from the inlet 52 toward the outlet 53. Each second nozzle 54 is supplied with air via the air supply passage 56 and the air flow passage 55.

  As shown in FIG. 1, the yarn monitoring device 5 monitors the information of the traveling yarn Y, and detects the presence or absence of a yarn defect based on the monitored information. When the yarn monitoring device 5 detects a yarn defect, the yarn monitoring device 5 transmits a yarn defect detection signal to the control unit 90. When the yarn defect detection signal is received, the control unit 90 stops the operation of the draft device 3 and the pneumatic spinning device 4 so that the supply of the yarn Y is interrupted in order to cut the yarn Y. For example, the yarn monitoring device 5 may be provided with a cutter, and the yarn Y may be cut by operating the cutter.

  The yarn storage device 6 is disposed between the pneumatic spinning device 4 and the winding device 20, and includes a yarn storage roller 61 and a yarn hooking member 62. The yarn storage device 6 temporarily stores the yarn Y delivered from the pneumatic spinning device 4 around the yarn storage roller 61 and supplies the yarn Y to the winding device 20.

  The yarn storage roller 61 is rotated by an electric motor (not shown). The yarn hooking member 62 is attached to the downstream end of the yarn storage roller 61 and is rotatable relative to the yarn storage roller 61. A magnetic force acts on the yarn hooking member 62 to resist relative rotation with respect to the yarn storage roller 61. Therefore, in a state in which the yarn Y does not have tension above a predetermined level, the yarn hooking member 62 rotates integrally with the yarn storage roller 61, and the yarn Y is wound (stored) on the yarn storage roller 61. In a state in which a tension greater than a predetermined level is generated in the yarn Y, the yarn hooking member 62 rotates relative to the yarn storage roller 61, and the yarn Y is unwound from the yarn storage roller 61. By storing the yarn Y in this manner, the yarn storage device 6 stably pulls out the yarn Y from the pneumatic spinning device 4 while absorbing fluctuations in tension generated in the yarn Y on the downstream side of the yarn storage device 6.

  A first guide 63 is disposed upstream of the yarn storage device 6. The first guide 63 guides the yarn Y traveling to the yarn storage device 6 from the upstream side. The first guide 63 is movable, and draws the yarn Y from the pneumatic spinning device 4 to the yarn storage device 6 when yarn splicing is performed. On the downstream side of the yarn storage device 6, a second guide 64, a third guide 65, and a fourth guide 66 are disposed. The second guide 64 and the third guide 65 guide the yarn Y traveling downstream from the yarn storage device 6. The second guide 64 is movable and can guide the yarn Y to the third guide. The fourth guide 66 is movable, and hangs the yarn Y on the yarn hooking member 62 or removes the yarn Y from the yarn hooking member 62.

  The yarn joining device 7 performs yarn joining to join the yarn Y from the pneumatic spinning device 4 and the yarn Y from the package P after the yarn Y is cut or the yarn Y is broken for some reason. The yarn joining device 7 is a splicer device that twists yarn ends together by a swirling flow. However, the yarn joining device 7 may be a mechanical knotter or the like. The first capture and guide device 8 and the second capture and guide device 9 are each pivotable about the proximal end portion. The first catching and guiding device 8 is rotated downward when yarn joining is performed, thereby capturing the yarn Y from the pneumatic spinning device 4 by the suction air flow, and then rotating upward. The yarn Y from the pneumatic spinning device 4 is guided to the yarn joining device 7. The second catching and guiding device 9 is rotated upward when the yarn joining is performed, thereby catching the yarn Y from the package P by the suction air flow, and then rotating downward. The yarn Y from P is guided to the yarn joining device 7.

  The winding device 20 winds the yarn Y drawn by the yarn storage device 6 around a bobbin B to form a package P. The winding device 20 includes a drum (roller) 23, a pair of bobbin holders 21, a cradle 24, and a motor (drive unit) 28 that rotates the drum 23. In the present embodiment, one motor 28 rotates only one package P. That is, one motor 28 rotates only one drum 23. In the spinning machine 1, one motor 28 is provided in each spinning unit 2. A fifth guide 26 is disposed upstream of the winding device 20. The fifth guide 26 guides the yarn Y traveling to the drum 23 from the upstream side.

  The drum 23 contacts the bobbin B and rotates the bobbin B. In a state where the yarn Y is wound around the bobbin B, the drum 23 rotates in contact with the outer peripheral surface of the package P to rotate the package P. A groove (not shown) is formed on the surface of the drum 23. Thereby, when the yarn Y is wound around the bobbin B, the yarn Y is traversed. The traverse groove may not be formed on the surface of the drum 23, and the yarn Y may be traversed when the yarn Y is wound around the bobbin B by a traverse device provided separately.

  The cradle 24 absorbs the increase in the diameter of the package P accompanying the winding of the yarn Y on the bobbin B by pivoting about the pivot axis L2. The cradle 24 is provided with a pair of bobbin holders 21 and rotatably holds both ends of the bobbin B.

  The yarn detection sensor (first detection unit and second detection unit) 67 detects the storage amount of the yarn Y stored in the yarn storage device 6. The yarn detection sensor 67 sets the lower limit storage amount (the first predetermined amount and the second predetermined amount), which is the lower limit value of the appropriate storage amount, and the upper limit storage amount (the third predetermined amount), which is the upper limit of the appropriate storage amount. It can be detected. The yarn detection sensor 67 is disposed to face the outer peripheral surface of the yarn storage roller 61.

  The control unit 90 is an electronic control unit having a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), and the like. The control unit 90 loads a program stored in the ROM into the RAM and executes the control by the CPU to execute various controls. For example, as shown in FIG. 3, the control unit 90 mainly uses the information input from the yarn detection sensor 67 and uses the motor 28 of the winding device 20, the draft device 3, and the pneumatic spinning device 4. By controlling the yarn joining device 7, storage amount reduction control C is performed to rapidly reduce the storage amount of the yarn storage device 6 that has increased after the winding of the package P in the winding device 20 is started.

Next, the storage amount reduction control C executed by the control unit 90 will be described in detail with reference to FIG. The definitions of the second prescribed speed V0, the storage volume decrease rate V1, and the storage volume increase rate V3 described here are as follows.
Second prescribed speed V0: Rotational speed of the motor 28 predetermined as a speed at which fluctuation of the storage amount of the yarn storage device 6 can be suppressed Decreasing amount of storage amount V1: Faster than the second prescribed speed V0, the yarn storage device 6 Rotation speed of the motor 28 predetermined as the speed capable of reducing the amount of storage of the storage amount increase rate V3: the storage amount of the yarn storage device 6 can be increased later than the second prescribed speed V0 Speed of the motor 28 which is predetermined as a proper speed

  As shown in FIG. 4, the control unit 90 controls the motor 28 so that the motor 28 reaches the first specified speed V2 immediately after the start of winding of the package P, which is the speed at which the storage amount decreases V1 or more. Storage reduction control C for accelerating the rotational speed of The control unit 90 executes the storage amount reduction control C simultaneously with or after the end of the yarn joining operation in the yarn joining device 7. The storage amount reduction control C may also be executed at the start of winding after the empty bobbin B is set in the winding device 20 by the doffing device (not shown). The control unit 90 executes the storage amount reduction control C in a state where the drum 23 and the package P are in contact with each other. The first specified speed V2 in the storage amount reduction control C is constant regardless of the size of the diameter of the package P. That is, the motor 28 has such a torque that the package P can be rotated at the first predetermined speed V2 even if the diameter of the package P is increased.

  The control unit 90 controls the motor 28 to maintain the first predetermined velocity V2 after accelerating to the first predetermined velocity V2. When the controller 90 determines that the storage amount has become equal to or less than the lower limit storage amount based on the detection of the yarn Y in the yarn detection sensor 67, the controller 28 decelerates the motor 28 from the first prescribed velocity V2 to the second prescribed velocity V0. Control is performed to end the storage amount reduction control C. The change from the first specified speed V2 to the second specified speed V0 is performed not linearly but linearly.

  After controlling the motor 28 to execute the storage amount reduction control C, the control unit 90 executes a storage amount maintenance control C0 for controlling the rotational speed of the motor 28 so as to maintain the second prescribed speed V0. After finishing the storage amount reduction control C and executing the storage amount maintenance control C0, the control unit 90 controls the motor 28 to perform storage amount convergence control that repeats the first control C11 and the second control C12 shown below. Execute C1.

  The first control C11 rotates the motor 28 until the third prescribed speed V4 (in the present embodiment, the stored quantity increase speed V3 and the third prescribed speed V4 are the same speed), which is a speed equal to or less than the stored quantity increase speed V3. After decelerating the speed, if it is determined that the storage amount is equal to or more than the upper limit storage amount based on the detection of the yarn Y by the yarn detection sensor 67, the control of accelerating the rotational speed of the motor 28 to the second prescribed speed V0 is there. The control unit 90 executes the deceleration of the rotational speed of the motor 28 in the first control C11 in a stepwise manner until the storage amount becomes equal to or more than the lower limit storage amount. Stepwise deceleration of the rotational speed of the motor 28 in the first control C11 is executed until reaching the third specified speed V4 which is a preset lower limit speed value. In other words, in the first control C11, when the rotational speed of the motor 28 reaches the third specified speed V4, the third specified speed V4 is maintained. The acceleration of the rotational speed of the motor 28 from the third specified speed V4 decelerated in the first control C11 to the second specified speed V0 is performed not linearly but linearly.

  The second control C12 accelerates the rotational speed of the motor 28 until the fourth prescribed speed V5 (in the present embodiment, the stored quantity decreasing speed V1 and the fourth prescribed speed V5 are the same speed) equal to or higher than the stored quantity decreasing speed V1. Thereafter, based on the detection of the yarn Y by the yarn detection sensor 67, when it is determined that the storage amount has become equal to or less than the lower limit storage amount, control is performed to reduce the speed to the second specified speed V0. Although the fourth specified speed V5 is set to the same speed as the storage volume decreasing speed V1 in the present embodiment, the fourth specified speed V5 is the same as the first specified speed V2, or the first specified speed. It may be set to a speed faster than V2.

  The control unit 90 executes acceleration of the rotational speed of the motor 28 in the second control C12 in a stepwise manner until the storage amount becomes equal to or less than the lower limit storage amount. Stepwise acceleration of the rotational speed of the motor 28 in the second control C12 is performed until reaching a fourth specified speed V5 which is a preset upper limit speed value. In other words, in the second control C12, when the rotational speed of the motor 28 reaches the fourth specified speed V5, the fourth specified speed V5 is maintained. The change of the rotational speed of the motor 28 from the fourth specified speed V5 accelerated in the second control C12 to the second specified speed V0 is performed not stepwise but linearly.

  The control unit 90 controls the motor 28 to execute the storage amount maintenance control C0 between the storage amount reduction control C and the storage amount convergence control C1, but this storage amount maintenance control C0 is omitted. It is also good. The control unit 90 controls the motor 28 to execute the storage amount maintenance control C0 between the first control C11 and the second control C12. However, the storage amount maintenance control C0 may be omitted.

  When the storage amount maintenance control C0 is executed between the storage amount reduction control C and the storage amount convergence control C1, it is preferable to set the time as short as possible. That is, it is preferable that the transition from the storage amount reduction control C to the first control C11 in the storage amount convergence control C1 be performed as soon as possible. Thereby, even when the second prescribed speed V0 is faster than the delivery speed of the yarn Y of the air spinning device 4, the first control C11 is started, and the storage amount of the yarn Y is increased. It is possible to suppress the storage amount from becoming zero. As a result, it can be avoided that the storage amount becomes zero and the spinning unit 2 stops. The transition from the first control C11 to the second control C12 in the storage amount convergence control C1 may not be performed promptly as described above. The excessive storage amount of the yarn storage device 6 is because there are few disadvantages compared to the storage amount becoming zero.

  Next, the operation and effect of the spinning machine 1 of the embodiment described above will be described. In the spinning machine 1 of the above embodiment, the storage amount reduction control C is executed by controlling the motor 28 that drives the drum 23 that rotates the package P. Therefore, before the start of winding of the package P in the winding device 20 The storage amount of the increased yarn storage device 6 can be rapidly reduced.

  In the spinning machine 1 of the above embodiment, one motor 28 is provided for each of the winding devices 20 provided in each of the plurality of spinning units 2. As a result, since the rotation of one package P is controlled by one motor 28, it is possible to execute the winding control in the package P more precisely.

  In the spinning machine 1 of the above embodiment, the control unit 90 executes the storage amount reduction control C in a state where the drum 23 and the package P are in contact with each other. For this reason, since a contact pressure always acts on the yarn Y wound around the package P, it is possible to generate a good quality package P without unevenness in tension.

  In the spinning machine 1 of the above embodiment, the control unit 90 executes the stored amount reduction control C simultaneously with or after the end of the yarn joining operation in the yarn joining device 7, so the winding device 20 for the yarn joining operation. By stopping the winding of the yarn, it is possible to rapidly reduce the increased storage amount of the yarn storage device 6.

  In the storage amount reduction control C of the spinning machine 1 of the above embodiment, as shown in FIG. 4, after the rotational speed of the motor 28 is accelerated to the first specified speed V2, the first specified speed V2 is maintained The motor 28 is controlled to do this. Therefore, the response speed of the motor 28 or the like is the cause, and the problem that sufficient deceleration can not be performed before the storage amount of the yarn Y disappears is resolved. As a result, it can be avoided that the storage amount is lost.

  In the spinning machine 1 of the above embodiment, when the control unit 90 determines that the storage amount has become equal to or less than the lower limit storage amount based on the detection of the yarn Y by the yarn detection sensor 67, the storage amount reduction control C ends. . Thereby, the storage amount reduction control C is ended at an appropriate timing, and thereafter, the fluctuation of the storage amount of the yarn storage device 6 can be suppressed. As a result, the tension of the yarn Y in the package P can be easily maintained constant, and the quality of the package P can be improved. Furthermore, it is possible to reliably avoid the loss of the storage amount in the yarn storage device 6.

  If the take-up speed of the yarn Y in the take-up device 20 and the delivery speed at which the pneumatic spinning device 4 supplies the yarn Y can be matched, the storage amount of the yarn storage device 6 can be made constant. For this reason, in the spinning machine 1 of the above embodiment, the delivery of the yarn Y sent from the pneumatic spinning device 4 is a second prescribed speed V0 predetermined as the speed at which the fluctuation of the storage amount of the yarn storage device 6 can be suppressed. I try to match the speed. However, a speed difference occurs between the second prescribed speed V0 and the delivery speed, since a speed difference occurs due to various conditions between the driving speed of the motor 28 and the actual winding speed of the package P. There is. In such a case, even if the storage amount maintenance control C0 for controlling the rotational speed of the motor 28 to the second prescribed speed V0 is executed, the storage amount of the yarn storage device 6 can not be maintained within a certain range. . The control unit 90 of the spinning machine 1 according to the embodiment controls the motor 28 to execute the storage amount convergence control C1 that repeats the first control C11 and the second control C12 described above. Even if there is a speed difference between the delivery speed, the storage amount can be maintained in a certain range.

  In the spinning machine 1 of the above-described embodiment, the control unit 90 accelerates or decelerates the rotational speed of the motor 28 based on the detection of the lower limit storage amount and the upper limit storage amount by the yarn detection sensor 67. As a result, since acceleration or deceleration is performed to the second prescribed speed V0 at an appropriate timing, it is possible to suppress the fluctuation of the storage amount of the yarn storage device 6.

  In the first control C11 and the second control C12 of the spinning machine 1 of the above embodiment, the rotational speed of the motor 28 is limited only to the lower limit speed value or the upper limit speed value set in advance so that the rotational speed of the motor 28 is decelerated or accelerated. . As a result, it is possible to prevent the storage amount of the yarn storage device 6 from excessively increasing, and to avoid the loss of the storage amount of the yarn storage device 6.

  In the spinning machine 1 of the above-described embodiment, the control unit 90 executes the deceleration or acceleration of the rotational speed of the motor 28 in the first control C11 and the second control C12 in stages. As a result, the occurrence of a slip between the package P and the drum 23 is avoided in the winding device 20, so the storage amount in the yarn storage device 6 is accurately controlled. Note that this stepwise control is not essential, and may be performed linearly.

  In the spinning machine 1 of the above embodiment, the rotational speed of the motor 28 from the fourth specified speed V5 accelerated in the second control C12 to the third specified speed V4 decelerated in the first control C11 to the second specified speed V0 The change is performed not linearly but linearly. As a result, the variation of the storage amount of the yarn storage device 6 is rapidly shifted to a state in which the variation amount of the storage amount of the yarn storage device 6 decreases, so that the variation of the storage amount of the yarn storage device 6 can be suppressed.

  In the spinning machine 1 of the above embodiment, even if the motor 28 increases the diameter of the package P, the first specified speed in the storage amount reduction control C becomes constant regardless of the size of the diameter of the package P, The package P has a torque capable of rotating at a first predetermined speed. As a result, it is not necessary to execute take-up control of the package P in consideration of weight and inertia based on the size of the diameter of the package P, and the storage amount of the yarn storage device 6 can be reduced by simple control. .

  The yarn winding method implemented in the spinning machine 1 has a first prescribed speed V2 that is capable of reducing the storage amount of the yarn Y in the yarn storage device 6 after the start of winding of the package P, and the storage amount reduction speed V1 or more. The rotational speed of the motor 28 is accelerated until According to this winding method, the storage amount of the yarn storage device 6 which has been increased before the start of winding of the package P can be rapidly reduced.

  As mentioned above, although one embodiment of the present invention was described, the present invention is not limited to the above-mentioned embodiment.

  In the above embodiment, the winding device 20 has been described as an example in which the bobbin 23 in contact with the drum 23 is driven to rotate as the drum 23 is driven to rotate, but is not limited to this example. B may be driven to rotate, and the drum 23 in contact with the bobbin B may be driven to rotate. That is, the drum 23 may be any drum that rotates in contact with the bobbin B. In this case, the motor 28 drives and rotates the bobbin B.

  In the above embodiment, an example in which the rotation of the drum 23 is controlled to execute the storage amount reduction control C and the storage amount convergence control C1 has been described, but instead of the example, the arrangement direction of the plurality of spinning units 2 A motor (not shown) for driving a reverse rotation roller provided on a work carriage (not shown) movable along the distance. The reverse rotation roller is a roller that rotates the package P in a direction (yarn unwinding direction) opposite to the direction in which the drum 23 is rotated in contact with the package P supported by the winding device 20. The control unit 90 may execute the storage amount reduction control C and the storage amount convergence control C1 by controlling the motor so as to rotate the reverse rotation roller in the direction opposite to the yarn releasing direction. In this case, even if the drums 23 of the plurality of winding devices 20 included in the spinning machine 1 are driven at the same time, the package P is lifted from the drum 23 and the packages are rotated using the reverse rollers of the work carriage. By rotating P, it is possible to execute the storage amount reduction control C and the storage amount convergence control C1 similar to the above embodiment.

  In the above embodiment, the timing at which the storage amount reduction control C decelerates from the first specified speed V2 to the second specified speed V0 is described using an example in which control is performed based on the detection of the yarn Y by the yarn detection sensor 67. However, the present invention is not limited to the example. For example, if the control continuation time from the start of winding of the package P to the timing of the deceleration is set in advance based on the experience value, the same control as in the above embodiment can be performed without providing the yarn detection sensor 67. It will be possible to do. The control continues also in advance with respect to the acceleration from the third specified speed V4 to the second specified speed V0 in the storage amount convergence control C1, and the deceleration from the fourth specified speed V5 to the second specified speed V0 in the storage amount convergence control C1. If the time is set, the same control as the above embodiment can be performed without providing the yarn detection sensor 67.

  Instead of a configuration in which one yarn detection sensor 67 detects the lower limit storage amount which is the lower limit value of the appropriate storage amount and the upper limit storage amount which is the upper limit value of the appropriate storage amount, for example, the yarn detection sensor 67 Two yarn detection sensors 67 may detect the lower limit storage amount, and the other yarn detection sensor 67 may detect the upper limit storage amount.

  Instead of control in which acceleration and deceleration are repeated based on two thresholds (lower limit storage amount and upper limit storage amount) detected by one or two thread detection sensors 67, for example, one threshold, ie, a predetermined value Acceleration and deceleration may be repeated based on the detection result of the yarn detection sensor 67 that detects whether or not the storage amount is stored. For example, when the yarn detection sensor 67 is provided to detect the lower limit storage amount, the control unit 90 reduces the rotational speed of the motor 28 when the yarn detection sensor 67 no longer detects the yarn Y, and the yarn detection sensor When Y is detected, the rotational speed of the motor 28 is accelerated.

  After accelerating the rotational speed of the motor 28 to the first specified speed V2, the control unit 90 continues to accelerate as it exceeds the first specified speed V2, instead of maintaining the first specified speed V2. It may control to decelerate to V0 to the second specified speed. In this case, it is possible to prevent the storage amount from becoming zero by not significantly exceeding the storage amount decrease rate V1.

  The first specified speed V2 to the second specified speed V0 in the storage amount reduction control C, the third specified speed V4 to the second specified speed V0 in the first control C11, and the fourth specified speed V5 to the second specified in the second control C12 The change of the rotational speed of the motor 28 to the speed V0 may be a control that is performed stepwise, instead of the control that is performed linearly.

  In the spinning unit 2, the traveling direction of the yarn Y is switched in the yarn storage device 6, but the traveling direction of the yarn Y may not be switched in the yarn storage device 6. A delivery roller and a nip roller may be disposed between the pneumatic spinning device 4 and the yarn storage device 6 in order to draw the yarn Y from the pneumatic spinning device 4. The yarn monitoring device 5 may be disposed between the yarn storage device 6 and the winding device 20.

  DESCRIPTION OF SYMBOLS 1 ... Spinning machine, 2 ... Spinning unit, 3 ... Draft apparatus, 4 ... Air spinning apparatus, 5 ... Yarn monitoring apparatus, 6 ... Yarn storage apparatus, 7 ... Yarn joining apparatus, 20 ... Winding apparatus, 23 ... Drum (roller (roller) 28: motor (drive unit) 67: yarn detection sensor (first detection unit and second detection unit) 90: control unit C: storage amount reduction control C0: storage amount maintenance control C1: storage amount Convergence control, C11: first control, C12: second control, V0: second prescribed speed, V1: storage amount decreasing speed, V2: first prescribed speed, V3: storage amount increasing speed, V4: third prescribed speed, V5: 4th specified speed, Y: yarn, P: package.

Claims (15)

An air spinning device that produces yarn by air flow;
A winding device for winding up the yarn produced by the pneumatic spinning device to form a package;
A yarn storage device disposed between the pneumatic spinning device and the winding device, for temporarily storing the yarn fed from the pneumatic spinning device and sending the yarn to the winding device;
A driving unit for rotating the package in the winding device;
The drive unit is controlled to control the drive unit so as to reduce the storage amount of the yarn in the yarn storage device after the start of winding of the package, until the first prescribed speed equal to or higher than the storage amount reduction speed A control unit that executes storage amount reduction control that accelerates the rotational speed of the
A yarn winding machine comprising:   The yarn winding machine according to claim 1, wherein the drive unit rotates only one package. The winding device has a roller that rotates in contact with the outer circumferential surface of the package during winding of the package;
The yarn winding machine according to claim 1, wherein the control unit executes the storage amount reduction control in a state where the roller and the package are in contact with each other. It further comprises a yarn joining device for joining the yarn produced by the pneumatic spinning device and the yarn wound up by the winding device.
The yarn winding machine according to any one of claims 1 to 3, wherein the control unit executes the storage amount reduction control simultaneously with or after completion of a yarn joining operation in the yarn joining device.   5. The storage amount reduction control according to claim 1, wherein the rotational speed of the drive unit is accelerated to the first prescribed speed, and then the drive unit is controlled to maintain the first prescribed speed. The yarn winding machine according to any one of the preceding claims.   The storage amount reduction control is predetermined as a speed capable of maintaining the storage amount of the yarn in the yarn storage device within a predetermined range after accelerating the rotational speed of the drive unit to the first predetermined speed. The yarn winding machine according to any one of claims 1 to 5, wherein the rotational speed of the drive unit is reduced until the second specified speed is reached. It further comprises a first detection unit for detecting the storage amount of the yarn stored in the yarn storage device,
The yarn winding control according to claim 6, wherein the control unit ends the storage amount reduction control when it is determined that the storage amount has become equal to or less than a first predetermined amount based on the detection of the yarn in the first detection unit. Machine.   The control unit controls the drive unit so as to make it possible to increase the storage amount of the yarn in the yarn storage device later than the second prescribed speed after the storage amount reduction control ends. The first control which accelerates to the second prescribed speed after decelerating the rotational speed of the drive unit until the third prescribed speed equal to or less than the quantity increasing speed, and the stored amount faster than the second prescribed speed 8. The yarn winding according to claim 6, wherein a second control of accelerating the rotational speed of the drive unit to a fourth specified speed equal to or more than the reduction speed and then decelerating to the second specified speed is repeatedly performed. Machine. It further comprises a second detection unit for detecting the storage amount of the yarn stored in the yarn storage device,
The control unit accelerates the rotational speed of the drive unit to the second prescribed speed when it determines that the storage amount has become equal to or greater than a second predetermined amount based on the detection of the yarn in the second detection unit. Based on the detection of the yarn in the second detection unit, when it is determined that the storage amount has become equal to or less than a third predetermined amount smaller than the second predetermined amount, the rotational speed of the drive unit is increased until the second prescribed speed is reached. The yarn winding machine according to claim 8, which decelerates.   In the first control, the rotational speed of the drive unit is decelerated until reaching a preset lower limit speed value, and in the second control, the rotational speed of the drive unit reaches a preset upper limit speed value. The yarn winding machine according to claim 8 or 9, wherein is accelerated.   11. The method according to claim 8, wherein the control unit executes at least one of deceleration of rotational speed of the drive unit in the first control and acceleration of rotational speed of the drive unit in the second control in a stepwise manner. The yarn winding machine according to any one of the preceding claims.   The change of the rotational speed of the drive from the speed decelerated in the first control or the speed accelerated in the second control to the second prescribed speed is performed not linearly but linearly. The yarn winding machine according to any one of to 11.   The yarn winding machine according to any one of claims 1 to 12, wherein the first predetermined speed in the storage amount reduction control is constant regardless of the size of the diameter of the package. It further comprises a drafting device for drafting the fiber bundle supplied to the pneumatic spinning device,
The pneumatic spinning device includes a fiber guiding portion for guiding the fiber bundle sent out from the drafting device, a spinning chamber in which fibers of the fiber bundle guided from the fiber guiding portion are swirled by a swirling flow, and the spinning The yarn winding machine according to any one of claims 1 to 12, further comprising: a hollow guide shaft for guiding the fibers pivoted in a chamber to the outside. A pneumatic spinning device that produces yarn by an air flow, a winding device that winds up the yarn produced by the pneumatic spinning device to form a package, and a position between the pneumatic spinning device and the winding device A yarn storage device for temporarily storing the yarn delivered from the pneumatic spinning device and delivering the yarn to the winding device; and a drive unit for rotating the package in the winding device A yarn winding method implemented in
A yarn winding in which the rotational speed of the drive unit is accelerated to a first specified speed that is equal to or higher than a storage amount reduction speed capable of reducing the storage amount of the yarn in the yarn storage device after winding of the package is started. How to take.

Images