JP2014088638A - Yarn winder and yarn winding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yarn winder and a yarn winding method which can join yarn appropriately.SOLUTION: A spinning machine 1 comprises: a draft device 6 and a spinning device 7 supplying yarn Y; a winding device 13 rotating a package P positively and winding up the yarn Y to the package P; a splicer 26 joining the yarn Y of the spinning device 7 side and the yarn Y of the winding device 13 side when the yarn Y is cut; a suction pipe 27 and a suction mouth 28 guiding the yarn Y of the spinning device 7 side and the yarn Y of the winding device 13 side to the splicer 26 when the yarn Y is cut; and a unit controller controlling negative rotation of the package P after the suction pipe 27 and the suction mouth 28 finish the guiding of the yarn Y and before the splicer 26 begins the joining of the yarn Y.

Description

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

  As a conventional yarn winding machine, when the yarn is cut (including when the yarn is cut to remove the yarn defect and when the yarn is unexpectedly cut), the supply side yarn and the winding side One having a yarn splicing device that joins the other yarn is known (see, for example, Patent Document 1).

JP 2007-284812 A

  In the above-described yarn winding machine, if the rotation of the package is stopped after guiding the yarn on the winding side to the yarn joining device, the yarn on the winding side is broken during the yarn joining operation by the yarn joining device. In some cases, the splicing of the yarn on the supply side and the yarn on the winding side may fail.

  Accordingly, an object of the present invention is to provide a yarn winding machine and a yarn winding method capable of appropriately joining yarns.

  The yarn winding machine of the present invention includes a yarn feeding device that supplies yarn, a winding device that winds the yarn around the package by rotating the package forward, and a yarn and winding on the yarn feeding device side when the yarn is cut. A yarn joining device that performs a yarn joining operation for joining the yarn on the take-up device side, and a yarn guiding operation that guides the yarn on the yarn feeding device side and the yarn on the winding device side to the yarn joining device when the yarn is cut And a control unit that performs control to reversely rotate the package after the yarn guiding device ends the yarn guiding operation and before the yarn joining device starts the yarn joining operation.

  In the yarn winding machine of the present invention, when the yarn is cut (including when the yarn is cut to remove the yarn defect and when the yarn is unexpectedly cut), the yarn guide device performs the yarn guiding operation. After finishing, the package is rotated in reverse before the yarn joining device starts the yarn joining operation. Thereby, since the tension of the yarn on the winding device side is loosened, it is possible to prevent the yarn on the winding device side from being broken or causing a problem in the yarn splicing. Therefore, according to the yarn winding machine of the present invention, the yarn can be appropriately spliced.

  The yarn winding machine further includes a reverse rotation mechanism that reversely rotates the package, and the control unit reversely rotates the package after the yarn guide device finishes the yarn guide operation and before the yarn joining device starts the yarn joining operation. You may control a reverse rotation mechanism so that it may make. Alternatively, the control unit may control the winding device so as to reversely rotate the package after the yarn guiding device ends the yarn guiding operation and before the yarn joining device starts the yarn joining operation. With either configuration, the package can be appropriately rotated in the reverse direction.

  The control unit reversely rotates the package while the yarn guide device is performing the yarn guide operation, and after the yarn guide device finishes the yarn guide operation, before the yarn joining device starts the yarn joining operation, the package Alternatively, the reverse rotation of the package may be temporarily stopped and then the package may be reversely rotated again. According to this configuration, since the reverse rotation of the package is temporarily stopped, the control of the reverse rotation speed and / or the reverse rotation amount when the package is reversely rotated again can be facilitated.

  The control unit may adjust at least one of the reverse rotation speed and the reverse rotation amount of the package when performing control to reversely rotate the package. According to this configuration, it is possible to appropriately loosen the yarn tension on the winding device side according to the diameter of the package, the type of yarn, the yarn count, and the like.

  The yarn feeding device may include a draft device that drafts the fiber bundle and a spinning device that generates a yarn by twisting the fiber bundle. According to this configuration, high-quality yarn can be supplied efficiently.

  The spinning device may be an air spinning device that generates yarn by twisting a fiber bundle by a swirling flow of air. According to this configuration, higher quality yarn can be supplied more efficiently.

  The yarn winding machine may further include a plurality of yarn winding units provided with a yarn feeding device and a winding device, and one or a plurality of yarn joining carts provided with a yarn joining device and a yarn guiding device. . According to this configuration, the yarn winding unit and the yarn guiding device can be shared by a plurality of yarn winding units, and the structure of the yarn winding unit can be simplified.

  The yarn winding method of the present invention is a yarn winding method for winding a yarn around the package by rotating the package forward while supplying the yarn, and when the yarn is cut, the yarn on the supply side and the winding side are wound. A first step of performing a yarn guiding operation for guiding the yarn on the supply side and the yarn on the winding side to the yarn joining device that performs the yarn joining operation for joining the yarn; and after completing the yarn guiding operation, A second step of rotating the package in reverse before starting the yarn splicing operation. According to the yarn winding method of the present invention, it is possible to appropriately join yarns as in the above-described yarn winding machine.

  According to the present invention, it is possible to provide a yarn winding machine and a yarn winding method capable of appropriately joining yarns.

1 is a front view of a spinning machine that is a yarn winding machine according to an embodiment of the present invention. It is a side view of the spinning unit which is the yarn winding unit of one embodiment of the present invention. 5 is a timing chart showing the operation of the spinning unit from the middle of the yarn guiding operation to the end of the yarn joining operation. It is a side view of the spinning unit at the time of yarn cutting. It is a side view of the spinning unit during the yarn guiding operation. It is a side view of the spinning unit at the end of the yarn guiding operation. It is a side view of the spinning unit at the time of package reverse rotation. It is a side view of the spinning unit during the yarn splicing operation.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the same or an equivalent part, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 1, the spinning machine (yarn winding machine) 1 includes a plurality of spinning units (yarn winding units) 2, a yarn splicing carriage 3, a blower box 4, and a prime mover box 5. . Each spinning unit 2 generates the yarn Y and winds it on the package P. The yarn joining cart 3 travels between a plurality of spinning units 2 arranged in a line. The blower box 4 accommodates an air supply source and the like for generating a suction flow and a swirling flow in each part of the spinning unit 2. The prime mover box 5 accommodates a prime mover for supplying power to each part of the spinning unit 2. Each spinning unit 2 is provided with a unit controller (control unit) 10. The unit controller 10 controls the operation of the spinning unit 2 while communicating with a host controller (host controller) (not shown).

  As shown in FIGS. 1 and 2, each spinning unit 2 includes, in order from the upstream side, a drafting device (yarn feeding device) 6, a spinning device (yarn feeding device) 7, a yarn clearer 8, and a tension sensor 9. And a yarn storage device 11, a waxing device 12, and a winding device 13. Each device is directly or indirectly supported by the frame 19 so that the upstream side is the upper side (that is, the downstream side is the lower side). In the present embodiment, in the path along which the yarn Y travels (that is, the yarn path), the side where the yarn Y is generated is referred to as the upstream side, and the side where the yarn Y is wound is referred to as the downstream side.

  The draft device 6 is a device that stretches the sliver S to generate a fiber bundle F (that is, the fiber bundle F is a draft). The draft device 6 includes a back roller pair 14, a third roller pair 15, a middle roller pair 17 on which an apron belt 16 is hung, and a front roller pair 18. The bottom rollers of each of the roller pairs 14, 15, 17, 18 are driven at different rotational speeds by power from the prime mover box 5 or an electric motor (not shown) provided for each spinning unit 2. As a result, the draft device 6 draws the sliver S supplied from the upstream side to generate the fiber bundle F and supplies it to the spinning device 7 on the downstream side.

  The spinning device 7 is an air spinning device that generates a yarn Y by twisting the fiber bundle F by a swirling flow of air. More specifically (however, illustration is omitted), the spinning device 7 includes a spinning chamber, a fiber guide portion, a swirl flow generating nozzle, and a hollow guide shaft body. The fiber guide unit guides the fiber bundle F supplied from the upstream draft device 6 into the spinning chamber. The swirl flow generating nozzle is disposed around a path along which the fiber bundle F travels, and generates a swirl flow in the spinning chamber. By this swirl flow, the fiber ends of the fiber bundle F guided into the spinning chamber are reversed and swirled. The hollow guide shaft body guides the spun yarn Y from the spinning chamber to the outside of the spinning device 7.

  The yarn clearer 8 detects a yarn defect of the traveling yarn Y between the spinning device 7 and the yarn storage device 11. The yarn clearer 8 is configured to detect, for example, an abnormal thickness of the yarn Y and / or foreign matter contained in the yarn Y as yarn defects. The tension sensor 9 measures the tension of the traveling yarn Y between the spinning device 7 and the yarn storage device 11. The waxing device 12 applies wax to the traveling yarn Y between the yarn storage device 11 and the winding device 13.

  The yarn storage device 11 stores the traveling yarn Y between the spinning device 7 and the winding device 13. The yarn storage device 11 has a function of stably pulling out the yarn Y from the spinning device 7, a function of preventing the yarn Y from being loosened by retaining the yarn Y fed from the spinning device 7 during a yarn splicing operation, and winding It has the function of adjusting the tension of the yarn Y on the apparatus 13 side to prevent the fluctuation of the tension of the yarn Y on the winding apparatus 13 side from being transmitted to the spinning apparatus 7 side.

  The winding device 13 is a device that forms a full package P by rotating the package P forward and winding the yarn Y around the package P. The winding device 13 includes a cradle arm 21, a winding drum 22, and a traverse device 23. The cradle arm 21 is rotatably supported by a support shaft 24. The cradle arm 21 brings the surface of the bobbin B and the package P (that is, the bobbin B around which the yarn Y is wound) into contact with the surface of the winding drum 22 with an appropriate pressure. The winding drum 22 is driven by a driving source (not shown) provided in common to the plurality of spinning units 2 to rotate the package P in contact with the winding drum 22 in the forward direction. The traverse device 23 is driven through a shaft 25 shared by the plurality of spinning units 2 and traverses the yarn Y with a predetermined width with respect to the positively rotating package P.

  The yarn joining cart 3 travels between a plurality of spinning units 2 arranged in a row in order to join the yarn Y cut in each spinning unit 2. A splicer (yarn joining device) 26, a suction pipe (yarn guiding device) 27, a suction mouse (yarn guiding device) 28 and a reverse rotation mechanism 29 are arranged on the yarn joining cart 3. In the yarn splicing carriage 3, the suction pipe 27 is rotatably supported by a support shaft 31, and the suction mouth 28 is rotatably supported by a support shaft 32.

  When the yarn Y is cut, the splicer 26 performs a yarn joining operation for joining the yarn Y on the spinning device 7 side and the yarn Y on the winding device 13 side. The suction pipe 27 sucks and captures the yarn end of the yarn Y on the spinning device 7 side when the yarn Y is cut, and guides the yarn Y on the spinning device 7 side to the splicer 26. When the yarn Y is cut, the suction mouse 28 sucks and captures the yarn end of the yarn Y on the winding device 13 side and guides the yarn Y on the winding device 13 side to the splicer 26. That is, the suction pipe 27 and the suction mouth 28 perform a yarn guiding operation for guiding the yarn Y on the spinning device 7 side and the yarn Y on the winding device 13 side to the splicer 26 when the yarn Y is cut. The reverse rotation mechanism 29 causes the surface of the reverse rotation roller 29a to contact the surface of the package P with an appropriate pressure when the cradle arm 21 is rotated so that the package P is separated from the winding drum 22. The package P is reversely rotated.

  Next, the operation of the spinning unit 2 when the yarn Y is cut (the yarn winding method performed in the spinning unit 2) will be described with reference to the timing chart of FIG. When the yarn Y is cut, the yarn Y may be cut to remove the yarn defect, or the yarn Y may be cut unexpectedly.

  When the yarn Y is cut in order to remove the yarn defect, the unit controller 10 determines that the yarn Y has been cut by performing control for cutting the yarn Y by itself. In more detail, when the unit controller 10 receives the yarn defect detection signal from the yarn clearer 8 when the yarn Y is generated and wound on the package P, the unit controller 10 and the spinning device 6 cut the yarn Y to cut the yarn Y. The operation of the device 7 is stopped. At this time, the unit controller 10 determines that the yarn Y has been cut. On the other hand, when the yarn Y is unexpectedly cut, the unit controller 10 determines that the yarn Y has been cut based on a yarn detection signal transmitted from a yarn traveling sensor (not shown) provided at a predetermined position on the yarn path. to decide. Also in this case, the unit controller 10 stops the operations of the draft device 6 and the spinning device 7.

  When the unit controller 10 determines that the yarn Y has been cut, the cradle arm 21 is rotated after the yarn Y on the winding device 13 side is wound on the package P, as shown in FIG. A brake mechanism (not shown) provided at 21 is operated. Thereby, the forward rotation of the package P is stopped in a state where the package P is separated from the winding drum 22. Subsequently, the unit controller 10 transmits to the yarn joining cart 3 a control signal indicating the spinning unit 2 that has been determined that the yarn Y has been cut. Thereby, the yarn joining cart 3 travels to the front of the spinning unit 2 and stops.

  Subsequently, as shown in FIG. 5, the suction pipe 27 rotates to the downstream side of the spinning device 7 to generate a suction flow. At this time, since the unit controller 10 restarts the operations of the draft device 6 and the spinning device 7, the suction pipe 27 can capture the yarn end of the generated yarn Y while sucking it. Subsequently, the suction pipe 27 is rotated to a predetermined position before the original position (standby position), and a yarn guiding operation for guiding the yarn Y on the spinning device 7 side to the splicer 26 is performed.

  On the other hand, as shown in FIG. 5, the suction mouth 28 rotates to the vicinity of the surface of the package P to generate a suction flow. At this time, the reverse rotation mechanism 29 makes the reverse rotation roller 29a contact the package P and reversely rotates the package P at the first reverse rotation speed V1 (period until T1 in FIG. 3). The yarn end of the yarn Y that has been unwound from can be captured while being sucked. Subsequently, the suction mouse 28 rotates to a predetermined position before the original position (standby position), and performs a yarn guiding operation for guiding the yarn Y on the winding device 13 side to the splicer 26. When the suction mouse 28 performs the yarn guiding operation, the reverse rotation mechanism 29 reversely rotates the package P at the second reverse rotation speed V2 lower than the first reverse rotation speed V1 (from T2 to T3 in FIG. 3). period). As described above, the unit controller 10 performs control to reversely rotate the package P when the suction mouse 28 is performing the yarn guiding operation (first step).

  When the yarn guiding operation of the suction mouse 28 is completed, as shown in FIG. 6, the reverse rotation mechanism 29 temporarily stops the reverse rotation of the package P (period from T4 to T5 in FIG. 3). Subsequently, as shown in FIG. 7, the reverse rotation mechanism 29 reversely rotates the package P again at the third reverse rotation speed V3 lower than the second reverse rotation speed V2 (period from T6 to T7 in FIG. 3). ). Thus, after the suction mouse 28 finishes the yarn guiding operation, the unit controller 10 temporarily stops the reverse rotation of the package P and then reverses the package P again before the splicer 26 starts the yarn splicing operation. Control to rotate is performed (second step).

  Subsequently, as shown in FIG. 8, when the reverse rotation mechanism 29 stops the reverse rotation of the package P again, the splicer 26 performs a yarn splicing operation (period from T8 to T11 in FIG. 3). More specifically, when the splicer 26 moves a predetermined amount to the yarn path side, the splicer lever 26a is operated to draw the yarn Y on the spinning device 7 side and the yarn Y on the winding device 13 side (FIG. 3 from T8 to T9). When drawing is completed (at time T9 in FIG. 3), the splicer 26 cuts the yarn Y on the spinning device 7 side and the yarn Y on the winding device 13 side at predetermined positions, and spins by the action of air swirling flow. The yarn end of the yarn Y on the device 7 side and the yarn end of the yarn Y on the winding device 13 side are spliced (period from T9 to T10 in FIG. 3). When the piecing is completed (at time T10 in FIG. 3), the splicer 26 operates the yarn feeding lever 26a to release the drawing of the yarn Y that has been spliced (period from T10 to T11 in FIG. 3). .

  When the yarn splicing operation of the splicer 26 is completed (at time T11 in FIG. 3), the unit controller 10 returns the suction pipe 27, the suction mouth 28, and the reverse rotation so as to return to the original position (standby position) of the yarn splicing carriage 3. The roller 29a is operated. Subsequently, as shown in FIG. 2, the unit controller 10 rotates the cradle arm 21 to bring the package P into contact with the winding drum 22, and resumes winding by the winding device 13.

  As described above, in the spinning machine unit 2, when the yarn Y is cut, after the suction pipe 27 and the suction mouth 28 complete the yarn guiding operation, before the splicer 26 starts the yarn splicing operation, the package P is rotated in reverse. Thereby, since the tension of the yarn Y on the winding device 13 side is loosened, it is possible to prevent the yarn Y on the winding device 13 side from being stretched out or causing a malfunction in the yarn splicing. Therefore, according to the spinning machine 1, the yarn can be appropriately spliced.

  In the spinning unit 2, when the suction pipe 27 and the suction mouth 28 are performing the yarn guiding operation, the package P is reversely rotated, and after the suction pipe 27 and the suction mouth 28 have completed the yarn guiding operation, the splicer 26 is Before starting the yarn splicing operation, the reverse rotation of the package P is temporarily stopped, and then the package P is reversely rotated again. Thus, by temporarily stopping the reverse rotation of the package P, it is possible to facilitate control of the reverse rotation speed and / or the reverse rotation amount when the package P is reversely rotated again.

  In the spinning unit 2, after the suction pipe 27 and the suction mouth 28 finish the yarn guiding operation, before the splicer 26 starts the yarn splicing operation, when the package P is rotated in the reverse direction, the unit controller 10 At least one of the reverse rotation speed and the reverse rotation amount can be adjusted. Thereby, the tension of the yarn Y on the winding device 13 side can be loosened appropriately according to the diameter of the package P, the type of the yarn Y, the yarn Y count, and the like.

  As a specific example, the following adjustment is performed for the reverse rotation speed. The stronger the suction force of the suction mouth 28 is, the easier it is for the yarn Y to be stretched out, so that the reverse rotation speed is increased. Since the yarn Y that is less likely to be stretched is more easily stretched, the reverse rotation speed is increased. As the yarn Y is more twisted, the reverse rotation speed is slowed because the twist (the yarn Y is shrunk and the yarn Y is spirally wound with some fibers of the yarn Y as the core) is more likely to occur. The thinner the yarn Y, the easier it is to tear the yarn Y, so the reverse rotation speed is increased. The reverse rotation amount is adjusted as follows. As the diameter of the package P increases, the amount of reverse rotation is increased in order to ensure reverse rotation. Since the yarn Y that is less likely to be stretched is more easily stretched, the amount of reverse rotation is increased. As the yarn Y is more strongly twisted, the yarn Y is more easily entangled when loosened, and therefore the reverse rotation amount is reduced. The thinner the yarn Y, the easier it is to tear the yarn Y, so the amount of reverse rotation is increased.

  Since the unit controller 10 stores information indicating the type of the yarn Y to be wound, the reverse rotation speed and reverse rotation of the package P are determined based on the stored information indicating the type of the yarn Y. At least one of the amounts can be adjusted. Information indicating the type of yarn Y to be wound may be input in advance to the unit controller 10 by the operator. The unit controller 10 detects the number of rotations of the front roller pair 18 of the draft device 6, the detection result of the number of rotations of the front roller pair 18, information from the start of winding of one package P, and information indicating the type of yarn Y Based on the diameter of the bobbin B and the traverse speed, the diameter of the package P can be calculated. However, a sensor capable of detecting the diameter of the package P may be provided separately.

  In the spinning unit 2, a yarn feeding device that supplies the yarn Y is configured by a draft device 6 and a spinning device 7. Moreover, the spinning device 7 is an air spinning device that generates a yarn Y by twisting the fiber bundle F by a swirling flow of air. Thereby, the high quality thread | yarn Y can be supplied efficiently.

  In the spinning machine 1, the draft device 6, the spinning device 7, and the winding device 13 are provided in each of the plurality of spinning units 2, and the splicer 26, the suction pipe 27, and the suction mouth 28 are disposed between the plurality of spinning units 2. It is provided in the traveling yarn joining cart 3. Thereby, since the splicer 26, the suction pipe 27, and the suction mouth 28 are shared by the plurality of spinning units 2, the structure of the spinning unit 2 can be simplified. Note that a plurality of yarn splicing carts 3 may be provided in one spinning machine 1 according to the number of spinning units 2.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example, in the above-described embodiment, each device is arranged so that the yarn Y supplied on the upper side is wound on the lower side in the machine height direction. However, in the yarn winding unit and the yarn winding machine of the present invention, Each device may be arranged so that the spun yarn supplied on the lower side is wound on the upper side. In the traveling direction of the yarn Y, the tension sensor 9 may be disposed on the upstream side of the yarn clearer 8. The unit controller 10 may be provided not for each spinning unit 2 but for each of a plurality of spinning units 2. Some or all of the control described as the control performed by the unit controller 10 may be performed by another controller such as a host controller.

  In the above embodiment, the brake mechanism provided in the cradle arm 21 is used to stop the forward rotation of the package P. However, the package stop mechanism provided in the yarn joining cart 3 may be used. In that case, first, in the spinning unit 2, the cradle arm 21 is rotated and the package P is separated from the winding drum 22. At this time, the package P continues to rotate forward with inertia. Subsequently, the yarn joining cart 3 travels to the front of the spinning unit 2 and stops. Then, the yarn joining cart 3 rotates the package stopping mechanism to contact the package P, and stops the normal rotation of the package P.

  In the above embodiment, the unit controller 10 controls the yarn joining cart 3, but a cart controller (cart control unit) provided separately from the unit controller 10 may control the yarn joining cart 3. In that case, first, a yarn joining request signal is transmitted from the unit controller 10 to the host controller. The host controller that has received the yarn joining request signal instructs the cart controller to perform the yarn joining operation in the spinning unit 2 having the unit controller 10 that has transmitted the yarn joining request signal. Thereby, the cart controller controls the suction pipe 27, the suction mouth 28, the splicer 26, and the like so as to perform the yarn splicing operation in the spinning unit 2.

  In the above embodiment, the yarn storage device 11 has a function of drawing the yarn Y from the spinning device 7. However, in the yarn winding unit and the yarn winding machine of the present invention, the delivery roller and the nip roller are supplied from the yarn supplying device that supplies the yarn. The thread may be withdrawn. In the above embodiment, the cutting of the yarn Y at the time of detecting the yarn defect is performed by stopping the swirling flow in the spinning device 7, but in the yarn winding unit and the yarn winding machine of the present invention, the yarn at the time of detecting the yarn defect is detected. Cutting may be performed by a cutter.

  In the above embodiment, the yarn supplying device for supplying the yarn Y is constituted by the draft device 6 and the spinning device 7. However, the yarn winding unit and the yarn winding machine of the present invention receive the yarn from the bobbin around which the yarn is wound. Other yarn feeding devices such as a yarn feeding device configured to supply may be applied.

  When the spinning device is an air spinning device, the spinning device is held by the fiber guide and protrudes into the spinning chamber in order to prevent the twist of the fiber bundle from being transmitted to the upstream side of the spinning device. The needle may be further provided. The spinning device may be one that prevents the twist of the fiber bundle from being transmitted to the upstream side of the spinning device by the downstream end portion of the fiber guide portion instead of such a needle. The spinning device may include a pair of air jet nozzles that twist in opposite directions.

  In the above embodiment, the bottom roller of the draft device 6 and the traverse mechanism of the traverse device 23 are driven by the power from the motor box 5 (that is, common to a plurality of spinning units 2), but each part of the spinning unit 2 ( For example, the drafting device 6, the spinning device 7, the winding device 13, etc.) may be driven independently for each spinning unit 2.

  In the above embodiment, after the suction pipe 27 and the suction mouth 28 finish the yarn guiding operation, the unit controller 10 rotates the reverse rotation mechanism 29 so as to reversely rotate the package P before the splicer 26 starts the yarn splicing operation. However, the present invention is not limited to this. When the winding device 13 is driven independently for each spinning unit 2, after the suction pipe 27 and the suction mouth 28 finish the yarn guiding operation, before the splicer 26 starts the yarn splicing operation, the package P The unit controller 10 may control the winding device 13 so as to reversely rotate. In any configuration, the package P can be appropriately rotated in the reverse direction.

  In the above embodiment, after the suction pipe 27 and the suction mouth 28 have finished the yarn guiding operation, before the splicer 26 starts the yarn splicing operation, the reverse rotation of the package P is temporarily stopped, and then the package P is restarted. Although reversely rotated, the present invention is not limited to this. From the time when the suction pipe 27 and the suction mouth 28 perform the yarn guiding operation until the splicer 26 starts the yarn splicing operation, the package P may be continuously rotated in the reverse direction while gradually decreasing the reverse rotation speed.

  In the above embodiment, after the suction pipe 27 and the suction mouth 28 finish the yarn guiding operation, the reverse rotation of the package P before the splicer 26 starts the yarn splicing operation is performed before the yarn Y is drawn by the yarn feeding lever 26a. Although stopped, the present invention is not limited to this. The reverse rotation of the package P may be stopped after the yarn Y is attracted by the yarn gathering lever 26a and before the yarn ends are spliced together by the splicer 26.

  DESCRIPTION OF SYMBOLS 1 ... Spinning machine (yarn winding machine), 2 ... Spinning unit (yarn winding unit), 3 ... Yarn splicing cart, 6 ... Draft device (yarn feeding device), 7 ... Spinning device (yarn feeding device), 10 ... Unit controller (Control unit), 13 ... winding device, 26 ... splicer (yarn splicing device), 27 ... suction pipe (yarn guide device), 28 ... suction mouth (yarn guide device), 29 ... reverse rotation mechanism, F ... fiber bundle , Y ... Yarn, P ... Package.

Claims (9)

A yarn feeder for supplying yarn;
A winding device for rotating the package forward and winding the yarn around the package;
A yarn joining device that performs a yarn joining operation to join the yarn on the yarn feeding device side and the yarn on the winding device side when the yarn is cut;
A yarn guiding device that performs a yarn guiding operation for guiding the yarn on the yarn feeding device side and the yarn on the winding device side to the yarn joining device when the yarn is cut;
A yarn winding machine comprising: a control unit that performs control to reversely rotate the package before the yarn joining device starts the yarn joining operation after the yarn guiding device has finished the yarn guiding operation. A reverse rotation mechanism for reversely rotating the package;
The control unit controls the reverse rotation mechanism so as to reversely rotate the package after the yarn guide device finishes the yarn guide operation and before the yarn joining device starts the yarn joining operation. The yarn winder according to claim 1.   The control unit controls the winding device so as to reversely rotate the package after the yarn guiding device ends the yarn guiding operation and before the yarn joining device starts the yarn joining operation. The yarn winder according to claim 1.   The control unit reversely rotates the package when the yarn guiding device is performing the yarn guiding operation, and after the yarn guiding device has finished the yarn guiding operation, the yarn joining device performs the yarn joining. The yarn winding machine according to any one of claims 1 to 3, wherein control is performed such that the reverse rotation of the package is temporarily stopped before the operation is started, and then the package is reversely rotated again.   The yarn winding machine according to any one of claims 1 to 4, wherein the control unit adjusts at least one of a reverse rotation speed and a reverse rotation amount of the package when performing control to reversely rotate the package.   The yarn winding machine according to any one of claims 1 to 5, wherein the yarn feeding device includes a draft device that drafts a fiber bundle and a spinning device that twists the fiber bundle to generate the yarn. .   The yarn winding machine according to claim 6, wherein the spinning device is an air spinning device that generates the yarn by twisting the fiber bundle by a swirling flow of air. A plurality of yarn winding units provided with the yarn feeding device and the winding device;
The yarn winding machine according to any one of claims 1 to 7, further comprising one or more yarn joining carts provided with the yarn joining device and the yarn guiding device. A yarn winding method for winding the yarn around the package by rotating the package forward while supplying the yarn,
When the yarn is cut, a yarn guide that guides the supply-side yarn and the winding-side yarn to a yarn joining device that performs a yarn-joining operation for joining the supply-side yarn and the winding-side yarn. A first step of performing the operation;
A second step of reversely rotating the package after the yarn guiding operation is completed and before the yarn joining device starts the yarn joining operation.

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