JP2016050054A - Yarn winding device and textile machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yarn winding device capable of starting rotation of a rotor properly while stabilizing tension of a yarn wound around the rotor in a yarn storage part after completion of yarn piecing work.SOLUTION: A winder unit 2 comprises a yarn feeding part 7, a yarn storage part 5, a package formation part 8, a yarn piecing device 14, a tension application part 12, and a control part 25. The yarn storage part 5 winds a yarn 20 fed by the yarn feeding part 7 around a yarn storage roller 32 and stores the yarn. The package formation part 8 draws and winds the yarn 20 from the yarn storage part 5, and forms a package 30. When the yarn 20 is segmented between the yarn feeding part 7 and the yarn storage part 5, the yarn piecing device 14 pieces the yarns together. The tension application part 12 is located between the yarn feeding part 7 and the yarn storage part 5, and applies tension to the yarn 20. The control part 25 controls the yarn storage roller 32 to rotate from a stop state while changing acceleration in a take-up direction of the yarn storage roller 32 after the completion of the yarn piecing work by the yarn piecing device 14.SELECTED DRAWING: Figure 2

Description

  The present invention mainly relates to a yarn winding device including a yarn storage unit and a tension applying unit.

  2. Description of the Related Art Conventionally, there is known a yarn winding device that unwinds a yarn from a yarn supplying bobbin, temporarily stores the yarn in a yarn storage unit, and winds the stored yarn by a package forming unit to form a package. This yarn winding device has a yarn joining device arranged between the yarn supplying bobbin and the yarn accumulating portion, and when the yarn is cut or broken when the yarn is unwound from the yarn supplying bobbin. Is configured so that yarn splicing can be performed by the yarn splicing device. In this yarn winding device, even when the yarn joining is performed by the yarn joining device, the package forming unit winds the yarn stored in the yarn storing unit, so that the yarn winding operation can be continued without stopping. It is possible to do.

  Patent Document 1 discloses an automatic winder winding unit in which a yarn unwound from a yarn supplying bobbin is temporarily stored in an accumulator having a rotatable drum, and the yarn stored in the accumulator is wound into a package.

  In the winding unit of Patent Document 1, for example, a gate type tensioner is provided to apply a predetermined tension to the traveling yarn. In Patent Document 1, it is assumed that a constant tension is applied to a yarn by a tensioner, whereby the yarn can be neatly wound and stored in an accumulator.

International Publication No. 2012/127939

  In the yarn winding device as shown in Patent Document 1, when the yarn joining needs to be performed by the yarn joining device, it is necessary to stop or reversely rotate the drum of the yarn storage unit. On the other hand, also during this time, the yarn in the yarn accumulating portion is pulled out and wound by the package forming portion, so that the yarn accumulating amount in the yarn accumulating portion decreases during the yarn joining operation. Therefore, immediately after the yarn splicing operation is completed, the yarn storage amount of the yarn storage portion is small. Since it is not known when it will be necessary to perform the yarn joining operation next, it is necessary to quickly recover the yarn storage amount reduced by the yarn joining operation.

  However, if the drum of the yarn storage section that has stopped is suddenly started to rotate, the yarn from the yarn supply bobbin to the yarn storage section will be stretched with a strong momentum. The tensor will be repelled by the yarn and behaved violently. As a result, the yarn tension may become unstable. In an extreme case, the yarn is cut at the portion of the tensioner, and the yarn joining operation by the yarn joining device is required again, and the yarn storage amount is further reduced, and the efficiency of the winding operation is reduced. It was lowered.

  The present invention has been made in view of the above circumstances. The purpose of the present invention is to appropriately rotate the rotating body while stabilizing the tension of the yarn wound around the rotating body in the yarn storage section after the end of the yarn joining operation. It is to provide a configuration that can be launched.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to a first aspect of the present invention, a yarn winding device having the following configuration is provided. That is, the yarn winding device includes a yarn supplying unit, a yarn accumulating unit, a package forming unit, a yarn joining device, a tension applying unit, and a control unit. The yarn supplying section supplies yarn. The yarn storage unit winds and stores the yarn of the yarn supplying unit by rotating the rotating body in the winding direction. The package forming unit draws a yarn from the yarn storage unit and winds the drawn yarn to form a package. When the yarn is split between the yarn supplying unit and the yarn storing unit, the yarn joining device connects the divided yarn on the yarn supplying unit side and the yarn on the yarn storing unit side. The tension applying unit is disposed between the yarn supplying unit and the yarn accumulating unit, contacts the yarn supplied from the yarn supplying unit, and applies tension to the yarn. The control unit controls the rotation of the rotating body. The controller is configured to stop the rotating body by acceleration change control for controlling the rotation of the rotating body so as to change the acceleration in the winding direction of the rotating body after completion of the yarn joining operation by the yarn joining device. To the winding direction.

  As a result, after the yarn splicing operation is completed, it is possible to start rotating the rotating body in a stopped state while stabilizing the tension of the yarn wound around the rotating body in relation to the tension applying unit.

  The yarn winding device preferably has the following configuration. In other words, after the yarn splicing operation is completed, the control unit rotates the rotating body in the winding direction with a first acceleration, and then rotates the rotating body in the winding direction with a second acceleration. The acceleration in the first acceleration is smaller than the acceleration in the second acceleration.

  As a result, the rotating body is accelerated with a small acceleration immediately after the end of the yarn joining, so that it is possible to prevent the tension applying portion from being suddenly stretched between the yarn supplying portion and the yarn accumulating portion. On the other hand, after the tension of the yarn is stabilized, the rotation of the rotating body is accelerated with a large acceleration, so that the yarn storage amount of the yarn storage portion can be quickly recovered.

  In the yarn winding device, it is preferable that the acceleration of the first acceleration and the acceleration of the second acceleration are constant.

  As a result, since the parameters are simplified, it is easy to set and manage the acceleration of the first acceleration and the acceleration of the second acceleration.

  The yarn winding device may have the following configuration. That is, the acceleration of the first acceleration increases linearly up to the acceleration of the second acceleration with time. The acceleration of the second acceleration is constant.

  In this case, since the acceleration immediately after the rotation of the rotating body is started (immediately after the start of the first acceleration) can be suppressed, the tension applying portion can be prevented from being ramped up. Further, since the acceleration does not change discontinuously when shifting from the first acceleration to the second acceleration, it is possible to prevent the yarn tension from becoming unstable as the acceleration is switched.

  In the yarn winding device, it is preferable that the control unit controls the rotating body to rotate at the target speed after the rotating speed of the rotating body reaches a preset target speed.

  Thereby, after the said rotary body reaches | attains target speed, it will rotate at a fixed speed, Therefore Speed control can be simplified. Moreover, the control of the yarn storage amount of the yarn storage unit is also simplified.

  In the yarn winding device, it is preferable that the rotating body has a cylindrical portion that winds and stores the yarn around a circumferential surface.

  Accordingly, since the length of the yarn wound around the rotating body can be easily calculated from the diameter of the cylindrical portion, the tension applied to the yarn with the acceleration of the rotating body can be easily calculated. Therefore, in the first acceleration and the second acceleration, it is possible to simplify the control of the tension applied to the yarn by the tension applying unit.

  The yarn winding device preferably includes a setting unit that allows an operator to set at least one of the acceleration of the first acceleration and the acceleration of the second acceleration.

  As a result, even if the type of yarn wound around the yarn winding device and the winding condition are variously changed, the operator can easily cope with the acceleration of the rotating body that is suitable for the situation.

  According to the 2nd viewpoint of this invention, the textile machine of the following structures is provided. That is, this textile machine includes a plurality of the yarn winding devices. The textile machine includes a collective setting unit that allows an operator to collectively set at least one of the acceleration of the first acceleration and the acceleration of the second acceleration for the plurality of yarn winding devices.

  Thereby, the setting of the acceleration of the rotating body can be easily performed for a large number of yarn winding devices provided in the textile machine. Therefore, the operation burden on the operator can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS The simplified front view which shows the whole structure of an automatic winder provided with the winder unit which concerns on one Embodiment of this invention. The schematic side view of a winder unit. The enlarged view which shows the structure of the periphery of a thread | yarn storage apparatus in detail. The graph explaining control of the rotational speed of a thread | yarn storage roller. The graph explaining control of the rotational speed of the thread | yarn storage roller in a modification.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing an overall configuration of an automatic winder 1 including a winder unit 2 according to the present embodiment.

  An automatic winder (textile machine) 1 shown in FIG. 1 includes a plurality of winder units (yarn winding devices) 2 arranged side by side, a machine base control device (collective setting unit) 3, a doffing device 4, and an unillustrated And a blower box.

  The winder unit 2 mainly includes a yarn supplying unit 7, a yarn storing unit 5, and a package forming unit 8. The winder unit 2 unwinds the yarn (spun yarn) 20 of the yarn supplying bobbin 21 supplied to the yarn supplying unit 7, temporarily stores the unwound yarn 20 in the yarn storing unit 5, and then forms a package. The package 30 is formed by being wound around the take-up bobbin 22 by the portion 8.

  The machine base control device 3 is configured as a microcomputer and includes a display 65 and an input key 66. The machine base control device 3 is configured to be communicable with each winder unit 2. An operator of the automatic winder 1 can manage a plurality of winder units 2 in a centralized manner by appropriately operating the machine control device 3.

  The doffing device 4 travels to the position of the winder unit 2 when the package 30 becomes full in the winder unit 2 (a state in which a predetermined amount of yarn 20 is wound), and the package 30 is full. And an empty take-up bobbin 22 is set. The operation of the doffing device 4 is controlled by the machine control device 3.

  Next, the configuration of the winder unit 2 will be described with reference to FIG. FIG. 2 is a schematic side view of the winder unit 2.

  As described above, the winder unit 2 includes the yarn supplying unit 7, the yarn accumulating unit 5, and the package forming unit 8.

  FIG. 2 shows a state of the winder unit 2 during normal winding. Here, “at the time of normal winding” is a state in which the yarn 20 is continuous between the yarn supplying bobbin 21 and the package 30, and the yarn 20 is unwound from the yarn supplying bobbin 21 and the package 30. Is a state in which the yarn 20 is wound up. Further, in the following description, “upstream side” and “downstream side” refer to an upstream side and a downstream side when viewed in the traveling direction of the yarn 20 during normal winding.

  The yarn supplying section 7 can hold a yarn supplying bobbin 21 for supplying the yarn 20 in a substantially upright state, and can unwind and supply the yarn 20 from the yarn supplying bobbin 21. The yarn supplying section 7 is disposed on the front side of the winder unit 2 by discharging the empty yarn supplying bobbin 21 when all the yarns 20 are unwound from the set yarn supplying bobbin 21. The magazine-type bobbin supply device 26 is configured to receive new yarn supply bobbins 21. In FIG. 1, the bobbin supply device 26 is not shown for easy understanding of the yarn traveling path from the yarn supplying unit 7 to the package forming unit 8.

  As shown in FIG. 2, the yarn storage unit 5 is disposed between the yarn supplying unit 7 and the package forming unit 8 and temporarily stores the yarn 20 supplied from the yarn supplying unit 7, and then the package forming unit. 8 is configured so as to be supplied to 8. The yarn storage unit 5 includes a yarn storage roller (rotary body) 32 around which the yarn 20 can be wound, and a roller drive motor 33 that rotationally drives the yarn storage roller 32.

  The roller drive motor 33 can rotate the yarn accumulating roller 32 in a direction in which the yarn 20 from the yarn supplying unit 7 is wound, and can also rotate in the opposite direction. In the following description, regarding the rotation of the yarn accumulating roller 32, the rotation in the direction of winding the yarn 20 from the yarn supplying unit 7 may be referred to as normal rotation, and the rotation in the opposite direction may be referred to as reverse rotation.

  The package forming unit 8 includes a cradle 23 configured to be capable of mounting the winding bobbin 22, and a traverse drum 24 that traverses the yarn 20 and drives the winding bobbin 22.

  The traverse drum 24 is disposed opposite to the take-up bobbin 22, and the take-up bobbin 22 is driven to rotate by rotating the traverse drum 24 with an electric motor (not shown). As a result, the yarn 20 stored in the yarn storage unit 5 can be unwound and pulled out, and wound on the winding bobbin 22. Further, a traverse groove (not shown) is formed on the outer peripheral surface of the traverse drum 24, and the traverse (traverse) of the yarn 20 with a predetermined width can be performed by the traverse groove. With the above configuration, the yarn 30 can be wound around the winding bobbin 22 while being traversed to form a package 30 having a predetermined length and a predetermined shape.

  The winder unit 2 includes various devices in a yarn traveling path from the yarn supplying unit 7 to the package forming unit 8 via the yarn storage unit 5. More specifically, in the yarn traveling path, the unwinding assisting device 10, the lower yarn blowing portion 11, the tension applying portion 12, and the upper portion are arranged in order from the yarn supplying portion 7 side to the yarn storing portion 5 side. A yarn catching unit 13, a yarn joining device 14, a yarn trap 15, a cutter 16, a clearer (yarn defect detecting device) 17, and an upper yarn drawing unit 48 are arranged.

  The unwinding assisting device 10 brings the movable member 40 into contact with the balloon formed on the upper portion of the yarn supplying bobbin 21 by swinging the yarn 20 to be unwound from the yarn supplying bobbin 21 so that the size of the balloon is appropriately set. By controlling this, the unwinding of the yarn 20 is assisted.

  The lower thread blower 11 is an air soccer device disposed immediately downstream of the unwinding assisting device 10 so that the lower thread on the yarn feeding bobbin 21 side can be blown up to the yarn joining device 14 side by compressed air. It is configured. With this configuration, when the yarn 20 is split between the yarn supplying bobbin 21 and the yarn accumulating portion 5, the yarn 20 on the yarn supplying bobbin 21 side is blown up by the lower yarn blowing portion 11 and the yarn joining device 14 ( The yarn trap 15) can be guided.

  The tension applying unit 12 applies a predetermined tension to the traveling yarn 20. The tension applying unit 12 of the present embodiment is configured as a gate type in which movable comb teeth are arranged with respect to fixed comb teeth, and the yarn 20 travels in a state where the comb teeth are in contact with the yarn 20 (comb A predetermined resistance is applied by running the thread 20 between the teeth). The movable comb teeth are configured to be movable by, for example, a solenoid so that the meshing state between the comb teeth can be adjusted, whereby the tension applied to the yarn 20 can be adjusted. However, the configuration of the tension applying unit 12 is not limited to this, and may be, for example, a disk-type tension applying device.

  The upper thread catcher 13 is disposed immediately upstream of the yarn joining device 14. The upper yarn catching portion 13 is connected to a negative pressure source (not shown), and can generate a suction air flow at the time of yarn joining to suck and catch the yarn 20 on the yarn storage portion 5 side.

  The yarn joining device 14 detects when the clearer 17 detects a yarn defect and cuts the yarn 20 with the cutter 16, when the yarn 20 being unwound from the yarn feeding bobbin 21 is broken, or when the yarn feeding bobbin 21 is turned off. When the yarn 20 between the yarn supplying bobbin 21 and the yarn storage unit 5 is divided, such as when replacing the yarn, the yarn 20 on the yarn supplying bobbin 21 side and the yarn storage unit 5 side The yarn 20 is spliced together. As such a yarn splicing device 14, a device using a fluid such as compressed air or a mechanical device can be used.

  The yarn trap 15 is disposed upstream of the cutter 16 and immediately downstream of the yarn joining device 14. The yarn trap 15 is configured as a cylindrical member connected to a negative pressure source (not shown), and is provided close to the traveling path of the yarn 20. With this configuration, when the yarn 20 is split between the yarn feeding bobbin 21 and the yarn storage unit 5, the yarn 20 on the yarn feeding bobbin 21 side blown up by the lower yarn blowing portion 11 is moved by the yarn trap 15. Can be captured by aspiration.

  The clearer 17 is configured to detect yarn defects such as slabs and foreign matter contamination by monitoring the thickness of the yarn 20 and the like. When the clearer 17 detects a yarn defect, the clearer 17 transmits a yarn defect detection signal to a control unit 25 (described later) that controls the winder unit 2. A cutter 16 for immediately cutting the yarn 20 in accordance with the yarn defect detection signal is disposed in the vicinity of the clearer 17.

  The upper yarn drawing portion 48 is an air soccer device arranged immediately upstream of the yarn storage portion 5 so that the upper yarn on the yarn storage portion 5 side can be blown down to the yarn joining device 14 side by compressed air. It is configured. More specifically, the upper thread drawing portion 48 is formed with an outlet for the thread 20, and a thread guide member 60, which is a curved cylindrical member, is provided so as to be close to the outlet. Yes. Openings are formed at both ends of the yarn guide member 60 in the longitudinal direction. The yarn guide member 60 is disposed such that an opening on one end side thereof is opposed to the air outlet of the upper yarn drawing portion 48 and an opening on the other end side is opposed to the upper yarn catching portion 13. In addition, a guide path that connects openings at both ends so as to bypass the yarn joining device 14 and the like is formed inside the yarn guide member 60.

  With this configuration, when the yarn 20 is in a divided state between the yarn feeding bobbin 21 and the yarn storage unit 5, the upper yarn drawing unit 48 moves the yarn 20 on the yarn storage unit 5 side to the guide path of the yarn guide member 60. The upper thread catching section 13 catches the upper thread catching section 13 and draws it out. Since the thread guide member 60 is formed with a not-shown penetrating slit over its entire length, the thread 20 is pulled from the inside of the thread guide member 60 in a state where the thread 20 is captured by the upper thread capturing portion 13. Can be pulled out. As described above, the yarn 20 on the yarn storage portion 5 side can be blown down by the upper yarn drawing portion 48 and guided to the yarn joining device 14 (upper yarn catching portion 13).

  Next, a configuration for controlling the winder unit 2 will be described.

  As shown in FIG. 2, each winder unit 2 includes a control unit 25. The control unit 25 includes hardware such as a CPU, ROM, and RAM (not shown), and software such as a control program is stored in the RAM. The hardware and software cooperate to control each configuration of the winder unit 2.

  Specifically, the control unit 25 drives the roller drive motor 33 to rotate the yarn storage roller 32 in the forward direction, and unwinds the yarn 20 from the yarn supply bobbin 21 set in the yarn supply unit 7 to thereby provide the yarn storage unit. 5 so as to be stored. At this time, the control unit 25 controls the unwinding assisting device 10 to assist the unwinding of the yarn 20, and also controls the tension applying unit 12 to apply an appropriate tension to the yarn 20. The control unit 25 controls an electric motor (not shown) that drives the traverse drum 24 to control the yarn 20 to be wound around the winding bobbin 22 to form the package 30.

  In the course of the yarn winding operation, the control unit 25 changes the speed at which the roller drive motor 33 rotates the yarn storage roller 32 in the forward direction so that a certain amount of yarn 20 is stored in the yarn storage unit 5. Control is performed (details will be described later). Further, when a yarn defect detection signal is input from the clearer 17, the control unit 25 controls the cutter 16 to operate.

  In addition, when the yarn 20 is divided between the yarn supplying unit 7 and the yarn accumulating unit 5, the control unit 25 performs the lower yarn blowing unit 11, the yarn trap 15, the upper yarn drawing unit 48, and the upper yarn catching unit. The portion 13 and the yarn joining device 14 are appropriately controlled to join the yarn 20 on the yarn feeding portion 7 side and the yarn 20 on the yarn storage portion 5 side.

  The control unit 25 included in each winder unit 2 is configured to be able to communicate with the machine base control device 3. As a result, the operations of the plurality of winder units 2 can be centrally managed in the machine control device 3.

  Next, the yarn splicing operation in the automatic winder 1 (winder unit 2) of the present embodiment will be described.

  That is, the yarn 20 on the yarn storage unit 5 side and the yarn 20 on the yarn supply bobbin 21 side are in a divided state due to yarn breakage, cutting of the yarn 20 with the cutter 16, or replacement of the yarn supply bobbin 21. Sometimes, the yarn joining operation by the yarn joining device 14 is performed.

  This will be specifically described below. The control unit 25 first blows up the yarn 20 on the yarn feeding bobbin 21 side upward by the lower yarn blowing portion 11. The yarn 20 blown up is sucked and captured by the yarn trap 15. Thereby, the yarn 20 on the yarn feeding bobbin 21 side can be guided to the yarn joining device 14.

  Before and after this, the control unit 25 blows off the yarn 20 stored in the yarn storage unit 5 by the upper yarn drawing unit 48 while rotating the yarn storage roller 32 of the yarn storage unit 5 in the reverse direction. The yarn 20 is fed along the yarn guide member 60 and is sucked and caught by the upper yarn catching portion 13. Thereby, the yarn 20 on the yarn storage section 5 side can be guided to the yarn joining device 14. The control unit 25 stops the reverse rotation of the yarn storage roller 32 when the yarn on the yarn storage unit 5 side is introduced into the yarn joining device 14.

  In this state, the control unit 25 operates the yarn joining device 14 to connect the yarn 20 on the yarn feeding bobbin 21 side and the yarn 20 on the yarn storage unit 5 side. When the yarn splicing operation is completed, the control unit 25 resumes the winding of the yarn around the yarn accumulating unit 5 by resuming the normal rotation of the yarn accumulating roller 32.

  Even when the yarn 20 between the yarn feeding bobbin 21 and the yarn storage unit 5 is in a divided state as described above, the winding of the yarn 20 around the package 30 in the package forming unit 8 is interrupted. Can continue without. That is, in the automatic winder 1 of the present embodiment, as described above, the yarn storage unit 5 is interposed between the yarn supply unit 7 and the package forming unit 8, and a certain amount of yarn 20 is placed on the yarn storage unit 5. Reserved. The package forming unit 8 is configured to wind up the yarn 20 stored on the yarn storage unit 5. Therefore, even if the supply of the yarn 20 from the yarn supplying bobbin 21 is interrupted for some reason (for example, when the yarn joining operation is performed), the winding of the yarn 20 around the package 30 can be continued. it can.

  Thus, since the winding operation in the package forming unit 8 is not interrupted by the yarn joining operation or the like, the package 30 can be generated at high speed and stably. Further, since the yarn accumulating portion 5 is interposed between the yarn supplying bobbin 21 and the package forming portion 8, the package formation is not affected by the tension variation when the yarn 20 is unwound from the yarn supplying bobbin 21. Winding at the part 8 can be performed.

  Next, with reference to FIG. 3, the yarn storage unit 5 of the present embodiment will be described. FIG. 3 is an enlarged view showing a detailed configuration around the yarn storage unit 5.

  As described above, the yarn storage unit 5 includes the yarn storage roller 32 and the roller drive motor 33.

  The yarn storage roller 32 is formed as a substantially cylindrical member, and is configured so that the yarn 20 can be stored by winding the yarn 20 around the outer peripheral surface thereof. The roller drive motor 33 can rotationally drive the yarn accumulating roller 32 around its axis. Hereinafter, the end of the yarn accumulating roller 32 on the side where the roller drive motor 33 is disposed may be referred to as a base end, and the opposite end may be referred to as a front end.

  As shown in FIG. 3, a taper-like proximal end side taper portion 32 a whose diameter increases toward the end portion is formed at the proximal end portion of the yarn accumulating roller 32. On the other hand, a tapered tip side taper portion 32 b whose diameter increases toward the end portion is formed at the tip portion of the yarn accumulating roller 32. A cylindrical portion 32c, which is a portion (a portion having a substantially constant diameter) formed in a cylindrical shape, is disposed between the proximal side tapered portion 32a and the distal end side tapered portion 32b. By forming the taper portion in this manner, the yarn 20 is prevented from slipping from the end portion of the yarn accumulating roller 32.

  An upper thread drawing portion 48 is disposed in the vicinity of the boundary portion between the proximal end side tapered portion 32a and the cylindrical portion 32c of the yarn accumulating roller 32. The upper thread drawing portion 48 is configured as a cylindrical member, and during normal winding, the yarn 20 on the yarn feeding bobbin 21 side passes through the inside of the upper yarn drawing portion 48 and the surface of the yarn accumulating roller 32. It is designed to be pulled out toward

  The yarn storage unit 5 rotates the yarn storage roller 32 forward in a state in which the yarn 20 is wound around the yarn storage roller 32, so that the yarn storage unit 5 is upstream of the yarn storage unit 5 (on the yarn feeding bobbin 21 side). Tension can be applied. Thereby, the yarn 20 can be unwound from the yarn supplying bobbin 21 and the yarn 20 can be wound around the surface of the yarn accumulating roller 32. As shown in FIG. 3, the yarn 20 is guided to the boundary portion between the proximal side taper portion 32a and the cylindrical portion 32c, so that the yarn 20 has a yarn layer on the distal end side from the proximal end side of the cylindrical portion 32c. It winds around sequentially while pushing away. As a result, the yarn 20 on the yarn accumulating roller 32 (on the cylindrical portion 32c) is pushed by the newly wound yarn 20, and is sequentially fed toward the tip end side on the surface of the cylindrical portion 32c. In this way, on the outer peripheral surface of the yarn accumulating roller 32, the yarn 20 is spirally aligned and wound regularly from the base end side.

  The thread 20 wound around the cylindrical portion 32c is eventually drawn to the downstream side (the tip portion side, the package forming portion 8 side) in a direction along the axial direction at a position in the axial direction of the cylindrical portion 32c. Here, when the yarn 20 is drawn out as described above, the yarn 20 passes through a drawing guide 37 arranged on an extension of the central axis of the yarn accumulating roller 32. In this way, by configuring the yarn 20 to be drawn out on the extension line of the central axis of the yarn storage roller 32, the yarn 20 can be drawn from the yarn storage roller 32 regardless of the rotation state of the yarn storage roller 32. it can. That is, the package forming unit 8 unwinds the yarn 20 from the yarn storage roller 32 into the package 30 regardless of whether the rotation direction of the yarn storage roller 32 is normal or reverse, and the rotation stops. Can be wound up.

  In the present embodiment, a rubber band (elastic ring member, drawn yarn guide member) 32d is hung on the yarn accumulating roller 32. The rubber band 32d is formed in an O-ring shape, and is disposed at a boundary portion between the cylindrical portion 32c and the tip side taper portion 32b. The yarn 20 passes between the rubber band 32d and the surface of the yarn storage roller 32, and is drawn out from the yarn storage roller 32. Since the tip side taper portion 32 b is formed on the yarn storage roller 32, the rubber band 32 d is not moved by the yarn 20 and falls off the yarn storage roller 32.

  With the above configuration, an appropriate tension is applied to the yarn 20 unwound from the yarn accumulating roller 32 by tightening the rubber band 32d against the yarn accumulating roller 32. Therefore, the formation of a balloon due to the swinging of the yarn 20 can be suppressed. At the same time, the unwinding of the yarn 20 can be stabilized. Further, since the lump of yarn 20 can be unwound and unwound, a phenomenon (sluffing) in which the yarn 20 on the yarn accumulating roller 32 becomes a lump and comes off at once can be prevented.

  Next, control of the storage amount of the yarn 20 in the yarn storage unit 5 will be described.

  In the vicinity of the yarn accumulating roller 32, a lower limit sensor 35 for detecting that the yarn 20 on the yarn accumulating roller 32 has become less than a predetermined lower limit amount and an upper limit sensor for detecting that the yarn 20 has exceeded a predetermined upper limit amount. (Yarn detection sensor) 36 is disposed. The lower limit sensor 35 and the upper limit sensor 36 can be configured as optical sensors, for example. The detection results of the lower limit sensor 35 and the upper limit sensor 36 are output to the control unit 25.

  When the controller 25 detects that the yarn on the yarn accumulating roller 32 has become less than the lower limit, the controller 25 appropriately controls the roller drive motor 33 to increase the rotational speed of the yarn accumulating roller 32. Thereby, the speed at which the yarn 20 is wound around the yarn accumulating roller 32 increases. On the other hand, during normal winding, the rotational speed of the traverse drum 24 is substantially constant, so the speed at which the yarn 20 on the yarn accumulating roller 32 is unwound toward the package 30 is substantially constant. The controller 25 controls the roller drive motor 33 so that the speed at which the yarn 20 is wound around the yarn storage roller 32 is larger than the speed at which the yarn 20 is unwound from the yarn storage roller 32. Thus, the storage amount of the yarn 20 on the yarn storage roller 32 can be gradually increased.

  On the other hand, when the controller 25 detects that the yarn on the yarn accumulating roller 32 has exceeded the upper limit, the controller 25 appropriately controls the roller drive motor 33 to reduce the rotational speed of the yarn accumulating roller 32. Thereby, the speed at which the yarn 20 is wound around the yarn accumulating roller 32 is reduced. The control unit 25 controls the roller drive motor 33 so that the speed at which the yarn 20 is wound around the yarn storage roller 32 is smaller than the speed at which the yarn 20 is unwound from the yarn storage roller 32. Thus, the amount of the yarn 20 on the yarn accumulating roller 32 can be gradually reduced. By the control as described above, the storage amount of the yarn 20 on the yarn storage roller 32 can be maintained to be equal to or more than the lower limit amount and less than the upper limit amount.

  Next, the operation of the yarn storage unit 5 after the yarn joining operation by the yarn joining device 14 is completed will be described.

  As described above, when the split yarn 20 is spliced by the splicing device 14, the control unit 25 resumes normal rotation of the yarn accumulating roller 32, whereby the yarn 20 to the yarn accumulating unit 5 is resumed. Resume winding.

  Here, while the yarn joining operation by the yarn joining device 14 is being performed, the yarn accumulating roller 32 of the yarn accumulating unit 5 stops or reversely rotates as described above. On the other hand, in the package forming unit 8, the winding of the yarn 20 is continued as usual. Therefore, when the yarn joining operation by the yarn joining device 14 is performed, the storage amount of the yarn 20 in the yarn storage unit 5 is reduced.

  If the storage amount of the yarn 20 in the yarn storage unit 5 is small, the storage amount is reduced when the yarn 20 is cut again or when the clearer 17 detects the yarn defect and cuts the yarn 20 with the cutter 16. There is a possibility that the winding of the yarn 20 at the package forming unit 8 cannot be continued due to zero. Therefore, immediately after the yarn joining operation by the yarn joining device 14 is completed, it is preferable to rotate the yarn accumulating roller 32 as fast as possible from the viewpoint of quickly recovering the yarn accumulating amount.

  However, if the rising speed at which the yarn accumulating roller 32 rotates forward becomes too sharp, the upstream yarn 20 will be abruptly stretched, so that the movable comb teeth that are in contact with the yarn 20 in the tension applying section 12 It may be repelled by the yarn 20 and behaved violently. Such ramping of the tension applying unit 12 causes the tension of the yarn 20 wound around the yarn accumulating roller 32 to become unstable. Further, if the tension applying portion 12 is extremely violated as described above, the yarn 20 may be cut, and another yarn joining operation may be required.

  Therefore, in the winder unit 2 of the present embodiment, the control unit 25 performs two-stage acceleration control as shown in the graph of FIG. FIG. 4 shows the relationship between the time from the end of the yarn splicing operation and the rotational speed and rotational acceleration of the yarn accumulating roller 32.

  Details will be described below. The control unit 25 controls the roller drive motor 33 so that the yarn accumulating roller 32 starts rotating at a predetermined small acceleration immediately after the yarn joining operation is completed. In the following description, acceleration based on this small acceleration may be referred to as first acceleration.

  The controller 25 controls the roller drive motor 33 to increase the rotation acceleration of the yarn accumulating roller 32 after performing the first acceleration for a predetermined time. In the following description, acceleration after switching to large acceleration may be referred to as second acceleration.

  The controller 25 continues the second acceleration while monitoring the rotational speed of the yarn accumulating roller 32. When the rotational speed of the yarn accumulating roller 32 reaches a predetermined target speed, the controller 25 stops the acceleration of the yarn accumulating roller 32. Shift to control of yarn storage amount. The target speed is a speed for gradually increasing the storage amount of the yarn 20 on the yarn storage roller 32 as described above, and is set in the control unit 25 in advance.

  As described above, the control unit 25 performs the first acceleration with a small acceleration and the second acceleration with a large acceleration in order to rotate the yarn storage roller 32 in a stopped state at a predetermined target speed. Thus, the roller drive motor 33 is controlled. By such control for changing the acceleration (acceleration change control), it is possible to achieve both the prevention of the tension applying portion 12 from being ramped and the quick recovery of the yarn storage amount in the yarn storage portion 5.

  In the present embodiment, as shown in the graph of FIG. 4, the acceleration in the first acceleration and the acceleration in the second acceleration are constant. Accordingly, since the parameters are simplified, setting and control relating to the speed of the yarn accumulating roller 32 can be simplified.

  Here, the yarn storage roller 32 has a cylindrical portion 32c having a substantially constant diameter, and the yarn 20 is wound around the cylindrical portion 32c and stored. Accordingly, the length of the yarn 20 wound around the cylindrical portion 32c can be easily calculated from the diameter of the cylindrical portion 32c. Furthermore, in this embodiment, the speed of the yarn accumulating roller 32 is controlled so as to increase linearly (in a linear function). Therefore, it is possible to relatively easily estimate the increasing / decreasing tendency of the tension of the yarn 20 when the yarn accumulating roller 32 winds up while accelerating the rotation. Therefore, the tension applied to the yarn 20 by the tension applying unit 12 can be easily controlled.

  In the upper graph of FIG. 4, in addition to the speed change of the yarn accumulating roller 32 after the end of the yarn splicing operation, the tension value (target tension value) that is the control target of the tension applying unit 12 and the actual measurement are measured. A change in the measured tension value (measured tension value) is also shown.

  According to this graph, the measured tension value is low immediately after the acceleration of the yarn accumulating roller 32, but from the time when the first acceleration is finished, the tension applying unit 12 adjusts the measured tension value so as to be close to the target tension value. It can be seen that the control is stable. In addition, immediately after the yarn splicing is completed and the yarn accumulating roller 32 starts accelerating, the measured tension value does not show an unstable behavior such that the measured tension value becomes zero or vigorously swings upward. It has changed moderately. Therefore, it can be seen that the tension applying portion 12 can be prevented from being ramped up.

  In the above example, when the elapsed time from the start of the first acceleration reaches a predetermined time, the first acceleration is shifted to the second acceleration. However, the conditions for switching from the first acceleration to the second acceleration can be variously determined. For example, the rotational speed of the yarn accumulating roller 32 has reached a constant speed, and the meshing teeth of the tension applying unit 12 are engaged. The control value indicating the degree can satisfy a predetermined condition, the tension measurement value detected by a tension measurement unit (not shown) provided in the winder unit 2 can satisfy the predetermined condition, and the like.

  The acceleration of the first acceleration and the acceleration of the second acceleration are stored in the storage unit 25a included in the control unit 25 as part of the winding condition parameters. In addition, the control unit 25 includes a setting unit 25b for allowing the operator to set the acceleration stored in the storage unit 25a. More specifically, when the operator operates a setting key (not shown) provided in the winder unit 2 and inputs the above two accelerations, for example, in the form of numerical values, the setting unit 25b stores the setting unit 25b. Update the set acceleration values. Therefore, the acceleration can be set flexibly according to the type of the yarn 20 and the like, and appropriate acceleration control can be performed.

  Further, the two accelerations described above can be set collectively for a large number of winder units 2. Specifically, the operator causes the setting screen to be displayed on the display 65 by operating the input key 66 of the machine base control device 3, and sets the above two accelerations in numerical values. As a result, the machine control device 3 communicates with the control units 25 included in all the winder units 2 and updates the two acceleration setting values stored in the storage unit 25a to the values input by the operator. Let Thereby, an operator's operation burden can be reduced effectively.

  As described above, the winder unit 2 of the present embodiment includes the yarn supplying unit 7, the yarn accumulating unit 5, the package forming unit 8, the yarn joining device 14, the tension applying unit 12, and the control unit 25. . The yarn supplying unit 7 supplies the yarn 20. The yarn storage unit 5 winds and stores the yarn 20 of the yarn supply unit 7 by rotating the yarn storage roller 32 forward. The package forming unit 8 draws the yarn 20 from the yarn storage unit 5 and winds the drawn yarn 20 to form the package forming unit 8. When the yarn 20 is divided between the yarn supply unit 7 and the yarn storage unit 5, the yarn joining device 14 includes the divided yarn 20 on the yarn supply unit 7 side, and the yarn 20 on the yarn storage unit 5 side. , Connect. The tension applying unit 12 is disposed between the yarn supplying unit 7 and the yarn accumulating unit 5 and contacts the yarn 20 supplied from the yarn supplying unit 7 to apply tension to the yarn 20. The control unit 25 controls the rotation of the yarn accumulating roller 32. The control unit 25 controls the yarn storage roller 32 by acceleration change control for controlling the rotation of the yarn storage roller 32 so that the acceleration of the normal rotation of the yarn storage roller 32 is changed after completion of the yarn joining operation by the yarn joining device 14. Rotate forward from the stopped state.

  Thereby, after the yarn splicing operation is completed, the yarn storage roller 32 in the stopped state can be started to rotate while stabilizing the tension of the yarn 20 wound around the yarn storage roller 32 in relation to the tension applying unit 12. .

  In the winder unit 2 of the present embodiment, the control unit 25 rotates the yarn accumulating roller 32 forward at the first acceleration after the yarn joining operation by the yarn joining device 14 is completed, and then performs the positive rotation at the second acceleration. Rotate. The acceleration in the first acceleration is smaller than the acceleration in the second acceleration.

  As a result, the yarn accumulating roller 32 is accelerated with a small acceleration immediately after the end of the yarn joining, so that it is possible to prevent the tension applying portion 12 from being violently stretched by the yarn 20 on the upstream side. On the other hand, after the tension of the upstream yarn 20 is stabilized, the rotation of the yarn storage roller 32 is accelerated with a large acceleration, so that the yarn storage amount of the yarn storage portion 5 can be quickly recovered.

  Further, in the winder unit 2 of the present embodiment, the acceleration of the first acceleration and the acceleration of the second acceleration are respectively constant.

  As a result, the parameters become simple, and the acceleration and acceleration in the first acceleration and the acceleration in the second acceleration can be easily set and managed by an operator, for example.

  In the winder unit 2 of the present embodiment, the control unit 25 controls the yarn storage roller 32 to rotate at the target speed after the rotation speed of the yarn storage roller 32 reaches the preset target speed. To do.

  Thereby, speed control of the yarn accumulating roller 32 can be simplified. In addition, since the yarn storage unit 5 can easily balance the speed at which the yarn 20 is wound from the yarn supply unit 7 and the speed at which the yarn 20 of the yarn storage unit 5 is pulled out by the package forming unit 8, Control of the storage amount of the yarn 20 in the storage unit 5 is simplified.

  Further, in the winder unit 2 of the present embodiment, the yarn storage roller 32 has a cylindrical portion 32c that winds and stores the yarn 20 on the peripheral surface.

  Thereby, since the length of the yarn 20 wound around the yarn storage roller 32 can be easily calculated from the diameter of the cylindrical portion 32c, the tension applied to the yarn 20 as the yarn storage roller 32 is accelerated can be easily calculated. Therefore, it is possible to simplify the control of the tension applied to the yarn 20 by the tension applying unit 12 in the first acceleration and the second acceleration.

  Further, the winder unit 2 of the present embodiment includes a setting unit 25b that allows an operator to set the acceleration of the first acceleration and the acceleration of the second acceleration.

  Thereby, even if the type and winding conditions of the yarn to be wound in the winder unit 2 are variously changed, the operator can easily cope with the acceleration by setting the acceleration of the yarn storage roller 32 suitable for the situation. .

  The automatic winder 1 according to the present embodiment includes a plurality of winder units 2. The automatic winder 1 includes a machine control device 3 that allows an operator to set the acceleration of the first acceleration and the acceleration of the second acceleration in a batch for a plurality of winder units 2.

  Thereby, the acceleration of the yarn accumulating roller 32 can be easily set for a large number of winder units 2 provided in the automatic winder 1. Therefore, the operation burden on the operator can be reduced.

  Next, a modification of the above embodiment 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.

  That is, in the above-described embodiment (FIG. 4), stepwise acceleration is performed with the acceleration of the first acceleration and the acceleration of the second acceleration being constant. On the other hand, in the present modification, as shown in FIG. 5, in the first acceleration, the acceleration is increased linearly from zero to the acceleration of the second acceleration, while the acceleration of the second acceleration is Control to be constant.

  In the configuration of the present modification, acceleration of the yarn accumulating roller 32 immediately after the yarn splicing operation is completed can be suppressed as compared with the above embodiment. Accordingly, it is possible to reliably prevent the tension applying portion 12 from being ramped up. In addition, since the transition from the acceleration of the first acceleration to the acceleration of the second acceleration becomes smooth, instability of the tension can be prevented.

  As described above, in the winder unit of the present modification, the acceleration of the first acceleration increases linearly up to the acceleration of the second acceleration with time. The acceleration of the second acceleration is constant.

  Thereby, the acceleration immediately after the start of the rotation of the yarn accumulating roller 32 (immediately after the start of the first acceleration) can be suppressed, so that the tension applying portion 12 can be prevented from being ramped up. Further, since the acceleration does not change discontinuously when shifting from the first acceleration to the second acceleration, it is possible to prevent the yarn tension from becoming unstable as the acceleration is switched.

  The preferred embodiments and modifications of the present invention have been described above, but the above configuration can be modified as follows, for example.

  In the present embodiment and the modification described above, the yarn accumulating roller 32 that has been stopped after the end of yarn splicing is rotated forward to the target speed by two accelerations having different accelerations. However, for example, the third acceleration may be performed after the second acceleration to realize three-stage acceleration. Further, the acceleration may be in four or more stages.

  In the modified example (FIG. 5), the acceleration in the first acceleration is configured to increase linearly from zero to the acceleration in the second acceleration. However, it may be configured to increase linearly from an acceleration other than zero to the acceleration in the second acceleration. Moreover, you may comprise so that acceleration may increase along a smooth curve instead of a straight line.

  In the above embodiment and the modification, the setting unit 25b included in the control unit 25 can set the acceleration of the first acceleration and the acceleration of the second acceleration. However, only one of the two accelerations may be set. In addition to the two accelerations, for example, a condition for switching from the first acceleration to the second acceleration may be set.

  In the present embodiment and the modification described above, the package forming unit 8 is controlled so as to wind the yarn 20 from the yarn storage unit 5 at a substantially constant speed. However, during the yarn joining operation by the yarn joining device 14, the winding speed of the package forming unit 8 is reduced, and after the yarn joining operation is completed, the package forming unit 8 is interlocked with the rotation of the yarn accumulating roller 32 being accelerated. The structure which accelerates the winding speed of may be sufficient.

  In the winder unit 2 of the present embodiment and the modified example described above, a second tension applying unit is further provided between the package forming unit 8 and the yarn accumulating unit 5, and an appropriate tension is applied to the yarn 20 wound around the package forming unit 8. You may comprise so that it may give.

  In the embodiment and the modification described above, the winder unit 2 is configured to supply the yarn supplying bobbin 21 by the magazine type bobbin supplying device 26. However, it may be changed to a configuration in which the yarn feeding bobbin 21 is supplied to the winder unit 2 by conveying the tray on which the yarn feeding bobbin 21 is set along an appropriate path.

  In the present embodiment and the modification described above, the package forming unit 8 is configured to traverse the yarn 20 by the traverse drum 24. However, a configuration in which the yarn 20 is traversed by an arm-type traverse mechanism may be employed.

  In the present embodiment and the modification described above, when the yarn 20 is divided, the yarn 20 is guided to the yarn joining device 14 by the air flow by the lower yarn blowing portion 11 and the upper yarn drawing portion 48. It is configured. However, the present invention is not limited thereto, and the yarn 20 from the yarn feeding bobbin 21 and the yarn 20 from the yarn accumulating roller 32 may be sucked and captured, and the captured yarn may be guided to the yarn joining device 14 by appropriate driving means. .

  The present invention is not limited to the winder unit 2 of the automatic winder 1, and can also be applied to a yarn winding device (for example, a spinning unit of a spinning machine) of another textile machine provided with a yarn storage unit and a tension applying unit. .

1 Automatic winder (textile machine)
2 Winder unit (yarn winding device)
3. Machine control device (batch setting unit)
DESCRIPTION OF SYMBOLS 5 Yarn storage part 7 Yarn supply part 8 Package formation part 12 Tension provision part 14 Yarn splicing device 20 Yarn (spun yarn)
25 control unit 25b setting unit 32 yarn accumulating roller

Claims (8)

A yarn supplying section for supplying yarn;
A yarn storage unit for winding and storing the yarn of the yarn supplying unit by rotating the rotating body in the winding direction;
A package forming unit that pulls out the yarn from the yarn storage unit and winds the pulled-out yarn to form a package;
A yarn splicing device that connects the divided yarn on the yarn supply unit side and the yarn on the yarn storage unit side when the yarn is divided between the yarn supply unit and the yarn storage unit;
A tension applying unit that is disposed between the yarn supplying unit and the yarn accumulating unit and that contacts the yarn supplied from the yarn supplying unit and applies tension to the yarn;
A control unit for controlling the rotation of the rotating body;
A yarn winding device comprising:
The controller is configured to stop the rotating body by acceleration change control for controlling the rotation of the rotating body so as to change the acceleration in the winding direction of the rotating body after completion of the yarn joining operation by the yarn joining device. A yarn winding device, wherein the yarn winding device is rotated in the winding direction. The yarn winding device according to claim 1,
The control unit, after the end of the yarn splicing operation, rotates the rotating body in the winding direction at a first acceleration, and then rotates in the winding direction at a second acceleration,
The yarn winding device according to claim 1, wherein an acceleration in the first acceleration is smaller than an acceleration in the second acceleration. The yarn winding device according to claim 1 or 2,
The yarn winding device, wherein the acceleration of the first acceleration and the acceleration of the second acceleration are constant. The yarn winding device according to claim 1 or 2,
The acceleration of the first acceleration increases linearly to the acceleration of the second acceleration over time,
The yarn winding device, wherein the acceleration of the second acceleration is constant. The yarn winding device according to claim 3 or 4,
The yarn winding device, wherein the control unit controls the rotating body to rotate at the target speed after the rotating speed reaches a preset target speed. A yarn winding device according to any one of claims 1 to 5,
The rotary body has a cylindrical portion that winds and stores a yarn around a circumferential surface. The yarn winding device according to any one of claims 1 to 6,
A yarn winding device, comprising: a setting unit that allows an operator to set at least one of the acceleration of the first acceleration and the acceleration of the second acceleration. A textile machine comprising a plurality of yarn winding devices according to claim 7,
A textile machine comprising a collective setting unit that allows an operator to collectively set at least one of the acceleration of the first acceleration and the acceleration of the second acceleration for the plurality of yarn winding devices.

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