JP2016102269A - Yarn winder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yarn winder which can prevent a part exposing core yarn from mixing into a package.SOLUTION: A spinning unit 2 comprises a draft unit 6, an air spinning unit 7, a core yarn feeding unit 200, a winding unit 13, a splicer 26 and a suction mouse 28. When the suction mouse 28 performs tension thread guard action, the winding unit 13 performs first looseness action of loosing spun yarn Y having core yarn C from a package P by reversing the package P. After the suction mouse 28 finishes the tension thread guard action and before the splicer 26 starts knotting action, the winding unit 13 performs second looseness action of loosing the spun yarn Y from the package P by reversing the package P. When a reverse rotation mechanism 33 performs the second looseness action, the suction mouse 28 sucks up the spun yarn Y from the package P.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a yarn winding machine.

  As a conventional yarn winding machine, a yarn feeding device that supplies a yarn having a core yarn, a winding device that winds the yarn around a package, a yarn from the yarn feeding device and a yarn from the package when the yarn is cut, 2. Description of the Related Art A yarn winding machine including a yarn joining device that performs a yarn joining operation to join the yarn is known (see, for example, Patent Document 1). Such a yarn winding machine may include a yarn guiding device that performs a yarn guiding operation for guiding the yarn from the package to the yarn joining device.

Japanese Patent Application Laid-Open No. 11-200165

  However, in the above-described yarn winding machine, a portion where the core yarn is exposed may be mixed into the yarn wound around the package.

  An object of this invention is to provide the yarn winding machine which can prevent that the part which the core yarn exposed exposed mixes in a package.

  The yarn winding machine of the present invention includes a yarn feeding device that supplies a yarn having a core yarn, a winding device that winds the yarn around the package by rotating the package forward, and a yarn feeding device when the yarn is cut. A yarn joining device that performs the yarn joining operation to join the yarn from the package and the yarn from the package, and a yarn guiding device that performs the yarn guiding operation to guide the yarn from the package to the yarn joining device when the yarn is cut And the winding device performs a first unwinding operation for reversely rotating the package and unwinding the yarn from the package when the yarn guiding device is performing the yarn guiding operation. After the guide operation is finished, before the yarn joining device starts the yarn joining operation, a second unwinding operation is performed in which the package is reversely rotated to unwind the yarn from the package. During the second unwinding operation, the yarn from the package is sucked.

  In the yarn winding machine, when the yarn is cut, the yarn guiding device performs a guiding operation for guiding the yarn from the package to the yarn joining device, and then the yarn joining device sends the yarn from the yarn feeding device. And a yarn splicing operation for joining the yarn from the package. In the guiding operation for guiding the yarn from the package to the yarn splicing device, the core yarn is likely to be exposed when a high tension is applied to the yarn from the package. However, in the yarn winding machine, after the yarn guiding operation is completed and before the yarn joining operation is started, a second unwinding operation is performed by the winding device to reversely rotate the package to unwind the yarn from the package. Further, during the second unwinding operation, the yarn from the package is sucked by the yarn guide device. Thereby, for example, even if the core yarn is exposed during the yarn guiding operation, the exposed portion of the core yarn is sucked by the yarn guiding device. Therefore, it is possible to prevent the portion where the core yarn is exposed from being mixed into the package.

  The yarn winding machine of the present invention performs a yarn moving operation for moving a yarn from a package after the yarn guiding device has finished the yarn guiding operation and before the winding device starts the second unwinding operation. May be further provided. Accordingly, the yarn from the package can be moved to a desired position before the yarn joining operation, so that the yarn joining operation can be more reliably performed.

  In the yarn winding machine of the present invention, the yarn moving device may move the yarn from the package toward the center of the package winding width by the yarn moving operation. Thereby, the yarn splicing operation can be more reliably performed.

  In the yarn winding machine of the present invention, the winding device may stop the reverse rotation of the package between the first unwinding operation and the second unwinding operation. Thereby, in the second unwinding operation, the package can be reliably reversely rotated by a desired reverse rotation amount.

  In the yarn winding machine of the present invention, the length of the yarn unwound by the winding device by the second unwinding operation may be equal to or longer than the length of the yarn from the winding device to the yarn joining device. As a result, it is possible to reliably recover a portion where the core yarn may be exposed.

  The yarn winding machine of the present invention may further include a setting unit that sets a time for performing the second unwinding operation. Thereby, the length of the yarn unwound by the second unwinding operation can be adjusted.

  In the yarn winding machine of the present invention, the yarn joining device brings the yarn joining unit that joins the yarn from the yarn feeding device and the yarn from the package, and the yarn from the yarn feeding device and the yarn from the package to the yarn joining unit. And a winding device, after the yarn guiding device finishes the yarn guiding operation, before the yarn feeding unit brings the yarn from the yarn feeding device and the yarn from the package into the yarn joining portion. The second unpacking operation may be performed. Thereby, a thread | yarn can be spliced in the state from which the part which the core thread exposed was removed.

  In the yarn winding machine of the present invention, the yarn supplying device includes a core yarn supplying device that supplies the core yarn, a draft device that drafts the fiber bundle, and air that generates a yarn by twisting the fiber bundle using the core yarn as a core. And a spinning device. Thereby, the thread | yarn which has a core thread | yarn can be produced | generated appropriately.

  The yarn winding machine according to the present invention causes the yarn guide device to suck the yarn from the package when the winding device performs the second unwinding operation and the winding device performs the second unwinding operation. You may further provide the control part which performs control. As a result, the second unwinding operation and the operation of causing the yarn guiding device to suck the yarn can be reliably performed.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the yarn winding machine which can prevent that the part which exposed the core yarn mixes in a package.

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 of the spinning machine of FIG. 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 during the yarn moving operation. It is a side view of the spinning unit during the second unwinding operation. It is a side view of the spinning unit during the yarn splicing operation.

  Hereinafter, 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, a spinning machine (yarn winding machine) 1 includes a plurality of spinning units 2, a yarn joining cart 3, a doffing cart (not shown), a first end frame 4, and a second end. And a frame 5. The plurality of spinning units 2 are arranged in a line. Each spinning unit 2 generates a spun yarn (yarn) Y and winds it on a package P. When the spun yarn Y is cut by a certain spinning unit 2 or the spun yarn Y is cut for some reason, the yarn splicing cart 3 performs a yarn splicing operation on the spinning unit 2. The doffing cart doffs the package P and supplies a new bobbin B to the spinning unit 2 when the package P is full in a spinning unit 2. The first end frame 4 accommodates a collection device for collecting fiber waste and yarn waste generated in the spinning unit 2.

  The second end frame 5 is configured to adjust the air pressure of the compressed air (air) supplied to the spinning machine 1 to supply air to each part of the spinning machine 1 and to supply power to each part of the spinning unit 2. A drive motor or the like is stored. The second end frame 5 is provided with a machine control device (setting unit) 41, a display screen 42, and input keys 43. The machine control device 41 centrally manages and controls each part of the spinning machine 1. The display screen 42 can display information related to the setting contents and / or status of the spinning unit 2. When the operator performs an appropriate operation using the input key 43, the setting operation of the spinning unit 2 can be performed.

  In the following description, in the travel path of the sliver S, the fiber bundle F (see FIG. 2) and the spun yarn Y, the side on which the sliver S is supplied is referred to as the upstream side, and the side on which the spun yarn Y is wound is referred to as the downstream side. . The side on which the spun yarn Y travels with respect to the yarn joining cart 3 is referred to as a front side, and the opposite side is referred to as a rear side. In the present embodiment, a work passage (not shown) extending in the arrangement direction of the plurality of spinning units 2 is provided on the front side of the spinning machine 1. The operator can operate and monitor each spinning unit 2 from the work path.

  As shown in FIGS. 1 and 2, each spinning unit 2 includes a draft device (yarn supply device) 6 and a core yarn supply device (yarn supply device) 200 in order from the upstream side in the traveling direction of the spun yarn Y. An air spinning device (yarn supplying device) 7, a yarn monitoring device 8, a tension sensor 9, a yarn accumulating device 11, a waxing device 12, and a winding device 13 are provided. A unit controller (control unit) 10 is provided for each predetermined number of spinning units 2 and controls the operation of the spinning units 2.

  The draft device 6 drafts a sliver (fiber bundle) S. The draft device 6 includes a back roller pair 14, a third roller pair 15, a middle roller pair 16, and a front roller pair 17 in order from the upstream side in the traveling direction of the sliver S. Each roller pair 14, 15, 16 and 17 has a bottom roller and a top roller. The bottom roller is rotationally driven by a drive motor provided in the second end frame 5 or a drive motor provided in each spinning unit 2. An apron belt 18 a is provided for the bottom roller of the middle roller pair 16. An apron belt 18 b is provided for the top roller of the middle roller pair 16.

  The core yarn supply device 200 unwinds the core yarn C from the core yarn package CP and supplies the core yarn C to the pneumatic spinning device 7. The core yarn supply device 200 includes a package support unit 50, a core yarn supply unit 51, and a core yarn guide unit 52. The package support unit 50 supports the core yarn package CP in a state where the center line of the core yarn package CP formed by winding the core yarn C around the core yarn bobbin CB extends horizontally and in the front-rear direction. The core yarn supply unit 51 unwinds from the core yarn package CP and applies tension to the core yarn C guided through the guide roller 53. The core yarn guide 52 guides the core yarn C supplied from the core yarn supply unit 51 between the middle roller pair 18 and the front roller pair 19 of the draft device 6. As a result, the core yarn supply device 200 supplies the core yarn C to the pneumatic spinning device 7.

  The pneumatic spinning device 7 uses the core yarn C supplied from the core yarn supply device 200 as a core, twists the fiber bundle F drafted by the draft device 6 by a swirling air flow, and the spun yarn Y having the core yarn C. Is generated. More specifically (however, illustration is omitted), the pneumatic spinning device 7 includes a spinning chamber, a fiber guide portion, a swirling air flow generation nozzle, and a hollow guide shaft body. The fiber guide unit guides the core yarn C supplied from the upstream core yarn supply device 200 and the fiber bundle F supplied from the draft device 6 into the spinning chamber. The swirling air flow generating nozzle is disposed around a path along which the core yarn C and the fiber bundle F travel, and generates a swirling air flow in the spinning chamber. By this swirling air flow, the fiber ends of the plurality of fibers constituting the fiber bundle F are reversed and swirled. The hollow guide shaft body guides the spun yarn Y from the spinning chamber to the outside of the pneumatic spinning device 7.

  The yarn monitoring device 8 monitors the information of the spun yarn Y that travels between the pneumatic spinning device 7 and the yarn storage device 11, and detects the presence or absence of a yarn defect based on the monitored information. When the yarn monitoring device 8 detects a yarn defect, the yarn monitoring device 8 transmits a yarn defect detection signal to the unit controller 10. The yarn monitoring device 8 detects, for example, abnormal thickness of the spun yarn Y, foreign matter contained in the spun yarn Y, and / or exposure of the core yarn C as the yarn defect. The yarn monitoring device 8 also detects yarn breakage and the like. The tension sensor 9 measures the tension of the traveling spun yarn Y between the pneumatic spinning device 7 and the yarn accumulating device 11, and transmits a tension measurement signal to the unit controller 10. When the unit controller 10 determines that there is an abnormality based on the detection result of the yarn monitoring device 8 and / or the tension sensor 9, the spinning yarn Y is cut in the spinning unit 2. Specifically, the supply of air to the pneumatic spinning device 7 is stopped, and the generation of the spun yarn Y is interrupted, whereby the spun yarn Y is cut. Alternatively, the spun yarn Y may be cut by a separately provided cutter.

  The waxing device 12 applies wax to the spun yarn Y between the yarn storage device 11 and the winding device 13.

  The yarn storage device 11 takes the slack of the spun yarn Y between the pneumatic spinning device 7 and the winding device 13. The yarn storage device 11 has a function of stably pulling the spun yarn Y from the air spinning device 7, and retains the spun yarn Y sent from the air spinning device 7 at the time of yarn splicing operation by the yarn splicing cart 3, etc. It has a function of preventing loosening and a function of preventing fluctuations in the tension of the spun yarn Y downstream of the yarn accumulating device 11 from being transmitted to the pneumatic spinning device 7.

  The winding device 13 rotates the package P forward and winds the spun yarn Y around the bobbin B or the package P. The winding device 13 includes a cradle arm 21, a winding drum 22, a traverse guide 23, and a reverse rotation mechanism 33. The cradle arm 21 supports the bobbin B so as to be rotatable. The cradle arm 21 is swingably supported by a support shaft 24 and brings the surface of the bobbin B or the surface of the package P into contact with the surface of the winding drum 22 with an appropriate pressure. A drive motor (not shown) provided on the second end frame 5 drives the winding drums 22 of the plurality of spinning units 2 all at once. Thereby, in each spinning unit 2, the bobbin B or the package P is rotated in the winding direction.

  The traverse guide 23 of each spinning unit 2 is provided on a shaft 25 shared by a plurality of spinning units 2. The traverse guide 23 traverses the spun yarn Y with a predetermined width with respect to the rotating bobbin B or package P by the drive motor of the second end frame 5 reciprocatingly driving the shaft 25 in the direction of the rotation axis of the winding drum 22. . When the cradle arm 21 is moved by an air cylinder (not shown) so that the package P is separated from the winding drum 22, the reverse rotation mechanism 33 appropriately moves the surface of the reverse rotation roller 33 a to the surface of the package P. The package P is rotated in reverse by contacting with pressure. The reverse rotation mechanism 33 is mounted on the yarn splicing cart 3.

  When the spun yarn Y is cut in a certain spinning unit 2 or the spun yarn Y is cut for some reason, the yarn splicing cart 3 travels to the spinning unit 2 and performs a yarn splicing operation. The yarn joining cart 3 includes a splicer (yarn joining device) 26, a suction pipe 27, a suction mouth (yarn guide device) 28, and a yarn moving device 34.

  The suction pipe 27 is rotatably supported by the support shaft 31, and guides the spun yarn Y from the pneumatic spinning device 7 to the splicer 26 while sucking it. The suction mouth 28 is rotatably supported by the support shaft 32 and performs a yarn guiding operation for guiding the spun yarn Y from the winding device 13 to the splicer 26 while sucking it.

  The yarn moving device 34 performs a yarn moving operation for moving the spun yarn Y from the winding device 13 guided to the splicer 26 by the yarn guiding operation toward the center of the winding width of the package P. Specifically, the yarn moving device 34 has a pair of yarn guide members (not shown) that can be opened and closed. During the yarn guiding operation, the pair of yarn guide members are held in an open state. That is, the two yarn guide members are held at positions separated from each other, and are located on both sides of the spun yarn Y from the winding device 13. When the yarn guide operation is completed, the pair of yarn guide members are driven to the closed state, and the spun yarn Y is moved toward the center of the winding width of the package P.

  The splicer 26 performs a splicing operation for splicing the spun yarn Y from the guided pneumatic spinning device 7 and the spun yarn Y from the package P. The splicer 26 is positioned with respect to the central region of the winding width of the package P. The splicer 26 includes a splicer head (yarn joining portion) 26a and a yarn gathering lever (yarn gathering portion) 26b. In the present embodiment, the splicer head 26a is provided so as to be able to advance and retract with respect to the yarn path. The splicer head 26a is held at a standby position away from the yarn path when the yarn splicing operation is not performed. In order to perform the yarn splicing operation, after the splicer head 26a moves forward, the yarn shifting lever 26b moves the spun yarn Y from the pneumatic spinning device 7 and the spun yarn Y from the package P to the splicer head 26a. The splicer head 26a joins the two spun yarns Y brought together by compressed air.

  Next, the operation of the spinning unit 2 when the spun yarn Y is cut will be described with reference to the timing chart of FIG. The timing chart of FIG. 3 shows the timing at which the unit controller 10 transmits a control signal to each device.

  When the spun yarn Y is cut, the spun yarn Y may be cut to remove a yarn defect, or the spun yarn Y may be cut unexpectedly. When the spun yarn Y is cut to remove the yarn defect, the unit controller 10 determines that the spun yarn Y has been cut by performing control for cutting the spun yarn Y by itself. More specifically, when the unit controller 10 receives a yarn defect detection signal from the yarn monitoring device 8 when the spun yarn Y is generated and wound on the package P, the unit controller 10 draws the draft device to cut the spun yarn Y. 6 and the operation of the pneumatic spinning device 7 are stopped. At this time, the unit controller 10 determines that the spun yarn Y has been cut. On the other hand, when the spun yarn Y is unexpectedly cut, the unit controller 10 is based on a yarn detection signal transmitted from a yarn travel sensor (not shown) provided at a predetermined position on the travel path of the spun yarn Y. It is determined that the spun yarn Y has been cut. Also in this case, the unit controller 10 stops the operations of the draft device 6 and the air spinning device 7.

  When the unit controller 10 determines that the spun yarn Y is cut, the cradle arm 21 is rotated after the spun yarn Y from the package P is wound around 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 a control signal indicating the spinning unit 2 that has been determined that the spun yarn Y has been cut to the yarn joining cart 3. Thereby, the yarn joining cart 3 travels to the spinning unit 2 and stops.

  Subsequently, as shown in FIG. 5, the unit controller 10 rotates the suction pipe 27 to the downstream side of the pneumatic spinning device 7 and generates a suction flow in the suction pipe 27. At this time, since the unit controller 10 restarts the operations of the draft device 6 and the pneumatic spinning device 7, the suction pipe 27 takes the spun yarn Y from the pneumatic spinning device 7 into the suction path (not shown) of the suction pipe 27. (That is, the suction pipe 27 captures the spun yarn Y). Subsequently, the unit controller 10 rotates the suction pipe 27 toward the splicer 26. Accordingly, the suction pipe 27 guides the spun yarn Y from the pneumatic spinning device 7 to the splicer 26 while sucking the spun yarn Y.

  On the other hand, as shown in FIG. 5, the unit controller 10 brings the reverse rotation roller 33a of the reverse rotation mechanism 33 into contact with the package P and rotates the reverse rotation roller 33a (period until T1 in FIG. 3). . Thereby, the package P is driven by the reverse rotation roller 33a by the frictional force with the reverse rotation roller 33a to start reverse rotation. Subsequently, the unit controller 10 rotates the suction mouse 28 to the vicinity of the surface of the package P and generates a suction flow in the suction mouse 28 (at time T1 in FIG. 3). As a result, the suction mouse 28 sucks the yarn end of the spun yarn Y from the package P unwound from the package P and takes the spun yarn Y into a suction path (not shown) of the suction mouse 28 (ie, The suction mouse 28 captures the spun yarn Y).

  Subsequently, the unit controller 10 rotates the suction mouse 28 toward the splicer 26 while continuing the generation of the suction flow of the suction mouse 28 (period from T1 to T2 in FIG. 3). Thus, the suction mouse 28 guides the spun yarn Y from the package P to the splicer 26 while sucking the spun yarn Y from the package P. In this way, the suction mouse 28 performs a yarn guiding operation for guiding the spun yarn Y from the package P to the splicer 26 while sucking it.

  The unit controller 10 causes the reverse rotation mechanism 33 to continue the rotation of the reverse rotation roller 33a when the suction mouse 28 is performing the yarn guiding operation. As a result, the reverse rotation roller 33a reversely rotates the package P to unwind the spun yarn Y from the package P. In this way, the reverse rotation mechanism 33 (winding device 13) is the first solution for reversely rotating the package P and unwinding the spun yarn Y from the package P when the suction mouse 28 is performing the yarn guiding operation. A dredging operation is performed (period from T1 to T2 in FIG. 3).

  After the suction mouse 28 finishes the yarn guiding operation, as shown in FIG. 6, the unit controller 10 stops the rotation of the reverse rotation roller 33a (period from T3 to T6 in FIG. 3). Thereby, the reverse rotation of the package P is stopped. Thus, the reverse rotation mechanism 33 (winding device 13) stops the reverse rotation of the package P between the first unwinding operation and the second unwinding operation described later.

  After the suction mouse 28 finishes the yarn guiding operation, the unit controller 10 causes the yarn moving device 34 to perform the yarn moving operation (period from T4 to T5 in FIG. 3). Thereby, the spun yarn Y from the package P is moved toward the center of the winding width of the package P. Thus, the yarn moving device 34 moves the spun yarn Y from the package P after the suction mouse 28 finishes the yarn guiding operation and before the reverse rotation mechanism 33 starts the second unwinding operation. Perform the action.

  After the yarn moving device 34 finishes the yarn moving operation, as shown in FIG. 7, the unit controller 10 starts the rotation of the reverse rotation roller 33a again. As a result, the reverse rotation roller 33a reversely rotates the package P to unwind the spun yarn Y from the package P. As described above, the reverse rotation mechanism 33 (winding device 13) is configured so that the splicer 26 is operated after the suction mouse 28 finishes the yarn guiding operation (more specifically, after the yarn moving device 34 finishes the yarn moving operation). Before starting the yarn splicing operation (more specifically, before the yarn shifting lever 26b moves the spun yarn Y from the pneumatic spinning device 7 and the spun yarn Y from the package P to the splicer head 26a), the package P The second unwinding operation for unwinding the spun yarn Y from the package P by performing reverse rotation is performed.

  The unit controller 10 continues the generation of the suction flow of the suction mouth 28 when the reverse rotation mechanism 33 is performing the second unwinding operation. As a result, the suction mouse 28 sucks the spun yarn Y from the package P and takes the spun yarn Y into the suction path of the suction mouse 28 when the reverse rotation mechanism 33 performs the second unwinding operation. be able to. For this reason, even if the core yarn C of the spun yarn Y from the package P is exposed by the yarn guiding operation performed by the suction mouse 28 and / or the yarn moving operation performed by the yarn moving device 34, the spun yarn Y Is sucked into the suction path of the suction mouse 28.

  The length of the spun yarn Y unwound by the second unwinding operation is equal to or longer than the length of the spun yarn Y extending from the winding device 13 to the splicer 26. More specifically, the length of the spun yarn Y extends from the separation point between the outer peripheral surface of the package P and the spun yarn Y unwound from the outer peripheral surface to the point where the splicer head 26a performs the yarn splicing operation. It is more than the length of. The length of the spun yarn Y can be changed by the operator. Specifically, the operator selects a desired condition by using the input key 43 from among a plurality of “time for performing the second unraveling operation” displayed on the display screen 42. The selected condition is set (stored) in the machine base control device 41. For example, when the operator sets the time for performing the second unwinding operation to be long, the time for rotating the package P in the reverse direction becomes long, so the length of the spun yarn Y unwound from the package P also becomes long. When the time for performing the second unwinding operation is set to be short, the time for reversely rotating the package P is shortened, so the length of the spun yarn Y unwound from the package P is also shortened. The unit controller 10 rotates the reverse rotation roller 33a at a constant speed regardless of which condition is selected. However, the rotational speed of the reverse rotation roller 33a may be varied according to the diameter of the package P.

  Subsequently, as shown in FIG. 8, the unit controller 10 stops the rotation of the reverse rotation mechanism 33 (time point T <b> 7 in FIG. 3). Thereby, the reverse rotation of the package P is stopped. Subsequently, the unit controller 10 stops the suction flow of the suction mouse 28 (at time T8 in FIG. 3). As a result, the spun yarn Y from the package P is no longer taken into the suction path of the suction mouse 28.

  Subsequently, the unit controller 10 causes the splicer 26 to perform a yarn splicing operation (period from T9 to T12 in FIG. 3). More specifically, the unit controller 10 first moves the splicer head 26a forward, and then operates the yarn moving lever 26b. Thereby, the spun yarn Y from the air spinning device 7 and the spun yarn Y from the package P are attracted to the splicer head 26a (period from T9 to T10 in FIG. 3). When the drawing of the spun yarn Y is completed (at time T10 in FIG. 3), the unit controller 10 causes the splicer 26 to cut the two spun yarns Y at predetermined positions, and the two spun yarns by the action of the swirling air flow. The yarn end of the yarn Y is spliced (period from T10 to T11 in FIG. 3). When the yarn splicing is completed (at time T11 in FIG. 3), the unit controller 10 operates the yarn shifting lever 26b to release the drawing of the spun yarn Y that has been spliced (from T11 to T12 in FIG. 3). period).

  When the splicing operation of the splicer 26 is completed (at time T12 in FIG. 3), the unit controller 10 returns the suction pipe 27, the suction mouth 28, the reverse rotation mechanism 33, and the original position of the yarn splicing carriage 3 to the original position. The yarn moving device 34 is operated. Subsequently, the unit controller 10 rotates the cradle arm 21 to the position shown in FIG. 2 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 1, when the spun yarn Y is cut, the suction mouse 28 performs the guiding operation for guiding the spun yarn Y from the package P to the splicer 26, and then the splicer 26. As a result, the yarn splicing operation for joining the spun yarn Y from the pneumatic spinning device 7 and the spun yarn Y from the package P is performed. In the guiding operation for guiding the spun yarn Y from the package P to the splicer 26, if a high tension is applied to the spun yarn Y from the package P, the risk of exposing the core yarn C increases. However, in the spinning machine 1, the second unwinding operation of unwinding the spun yarn Y from the package P by reversely rotating the package P by the winding device 13 after the yarn guiding operation is completed and before the yarn splicing operation is started. Is done. Further, the spun yarn Y from the package P is sucked by the suction mouse 28 during the second unwinding operation. Thereby, for example, even if the core yarn C is exposed during the yarn guiding operation, the exposed portion of the core yarn C is sucked by the suction mouse 28. Therefore, it is possible to prevent the portion where the core yarn C is exposed from being mixed into the package P.

  The spinning machine 1 includes a yarn moving device 34. Thereby, the spun yarn Y from the package P can be moved to a desired position before the yarn splicing operation. More specifically, the yarn moving device 34 moves the spun yarn Y from the package P toward the center of the winding width of the package P. Thereby, the yarn splicing operation can be more reliably performed.

  The reverse rotation mechanism 33 stops the reverse rotation of the package P between the first unwinding operation and the second unwinding operation. Thereby, the second unwinding operation can be performed after resetting the accumulation of the reverse rotation amount by the first unwinding operation. For this reason, in the second unwinding operation, the package P can be reliably reversely rotated by a desired reverse rotation amount. Further, since the reverse rotation of the package P is stopped during the yarn moving operation, rubbing by the yarn moving device 34 from the package P to the spun yarn Y can be reduced.

  In the spinning machine 1, the length of the spun yarn Y unwound by the winding device 13 by the second unwinding operation is equal to or longer than the length of the spun yarn Y extending from the winding device 13 to the splicer 26. More specifically, the length of the spun yarn Y extends from the separation point between the outer peripheral surface of the package P and the spun yarn Y unwound from the outer peripheral surface to the point where the splicer head 26a performs the yarn splicing operation. It is more than the length of. Thereby, the part with which the core yarn C may be exposed can be reliably collected.

  The spinning machine 1 includes a machine control device 41 that sets a time for performing the second unwinding operation. Thereby, the length of the spun yarn Y unwound by the second unwinding operation can be adjusted.

  Since the spinning machine 1 includes the core yarn supply device 200, the draft device 6, and the pneumatic spinning device 7, the spun yarn Y having the core yarn C can be appropriately generated.

  Since the spinning machine 1 includes the unit controller 10, the second unwinding operation and the operation of causing the suction mouse to suck the spun yarn Y can be reliably performed.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

  The spinning machine 1 has stopped the reverse rotation of the package P between the first unwinding operation and the second unwinding operation, but without stopping the reverse rotation of the package P, the spinning machine 1 Up to two unwinding operations may be a series of unwinding operations.

  Although the splicer 26 using compressed air is used as the yarn joining device, a knotter or the like that mechanically joins the spun yarn Y may be used. In the embodiment described above, the splicer head 26a can advance and retreat with respect to the yarn path.

  Although the yarn moving device 34 has moved the spun yarn Y toward the center of the winding width of the package P, the yarn moving device 34 may move the spun yarn Y toward a region other than the center depending on the yarn splicing position of the splicer 26. Good.

  In the spinning machine 1, the splicer 26, the suction pipe 27, the suction mouth 28, the reverse rotation mechanism 33, and the yarn moving device 34 are mounted on the yarn joining cart 3, but at least one of these parts is a yarn joining cart. The spinning units 2 may be provided directly without being mounted on the spinning unit 3.

  Although the winding device 13 includes the reverse rotation mechanism 33, the winding drum 22 of each spinning unit 2 may be driven independently without including the reverse rotation mechanism 33. Thereby, when the spun yarn Y of a certain spinning unit 2 is cut, the spun yarn Y can be unwound from the package P by rotating the winding drum 22 of the spinning unit 2 in the reverse direction. In addition, the winding device 13 includes the winding drum 22 and the reverse rotation mechanism 33. However, each winding device may be provided with a drive mechanism that directly rotates the support that supports the bobbin B without including the winding drum 22 and the reverse rotation mechanism 33. Good. In this case, the drive mechanism rotates the package P forward and winds the spun yarn Y around the package P. When the spun yarn Y of a certain spinning unit 2 is cut, the drive mechanism reversely rotates the package P of the spinning unit 2. To unwind the spun yarn Y.

  In the spinning machine 1, the brake mechanism provided in the cradle arm 21 is used to stop the forward rotation of the package P. However, a 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 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 spinning machine 1, the unit controller 10 controls the yarn joining cart 3. However, a cart controller (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 machine control device 41 which is a host controller. The machine control device 41 that has received the yarn joining request signal instructs the carriage 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 spinning machine 1 which is a yarn winding machine according to an embodiment of the present invention has been described. However, the present invention may be applied to other yarn winding machines. For example, the present invention may be applied to an automatic winder configured by arranging a plurality of winding units in parallel. The plurality of winding units wind up the spun yarn unwound from the yarn supply bobbin while traversing to form a package.

  In order to prevent the twist of the fiber bundle F from being transmitted to the upstream side of the air spinning device 7, the pneumatic spinning device 7 further includes a needle that is held by the fiber guide and arranged to protrude into the spinning chamber. May be. The pneumatic spinning device 7 may prevent the twist of the fiber bundle F from being transmitted to the upstream side of the pneumatic spinning device 7 by the downstream end portion of the fiber guide portion instead of such a needle. Good. Further, the pneumatic spinning device 7 may include a pair of air jet nozzles that twist the fiber bundle F in opposite directions instead of the above configuration.

  In the spinning unit 2, the yarn storage device 11 has a function of pulling the spun yarn Y from the air spinning device 7. However, the spun yarn Y may be pulled out from the air spinning device 7 by a delivery roller and a nip roller. When the spun yarn Y is pulled out from the pneumatic spinning device 7 by the delivery roller and the nip roller, a slack tube or a mechanical compensator that absorbs slackness of the spun yarn Y by a suction air flow may be provided instead of the yarn accumulating device 11. .

  In the spinning machine 1, each device is arranged so that the spun yarn Y supplied on the upper side is wound on the lower side in the height direction of the machine base. However, each device may be arranged so that the spun yarn Y supplied on the lower side is wound on the upper side.

  In the spinning machine 1, at least one of the bottom rollers of the draft device 6 and the traverse guide 23 are driven by power from the second end frame 5 (that is, common to the plurality of spinning units 2). However, each part of the spinning unit 2 (for example, the drafting device 6, the air spinning device 7, the winding device 13, etc.) may be driven independently for each spinning unit 2.

  In the traveling direction of the spun yarn Y, the tension sensor 9 may be arranged on the upstream side of the yarn monitoring device 8. The unit controller 10 may be provided for each spinning unit 2. In the spinning unit 2, the waxing device 12, the tension sensor 9, and the yarn monitoring device 8 may be omitted.

  In FIG. 1, the spinning machine 1 is illustrated so as to wind up the cheese-shaped package P, but it is also possible to wind up the cone-shaped package P. In the case of the cone-shaped package P, slack of the spun yarn Y occurs due to traversing of the spun yarn Y, and the slack can be absorbed by the yarn storage device 11.

  DESCRIPTION OF SYMBOLS 1 ... Spinning machine (yarn winding machine), 2 ... Spinning unit, 6 ... Draft device (yarn feeding device), 7 ... Air spinning device (yarn feeding device), 10 ... Unit controller (control unit), 13 ... Winding device 26 ... Splicer (yarn joining device), 26a ... Splicer head (yarn joining unit), 26b ... Yarn feeding lever (yarn gathering unit), 28 ... Suction mouse (yarn guiding device), 34 ... Yarn moving device, 41 ... Machine base control device (setting unit), 200: core yarn supply device (yarn feeding device), F: fiber bundle, Y: spun yarn (yarn), C: core yarn.

Claims (9)

A yarn supplying device for supplying a yarn having a core yarn;
A winding device for rotating the package forward and winding the yarn around the package;
A yarn joining device for performing a yarn joining operation to join the yarn from the yarn feeding device and the yarn from the package when the yarn is cut;
A yarn guide device that performs a yarn guide operation of guiding the yarn from the package to the yarn joining device while sucking the yarn from the package;
The winding device
When the yarn guide device is performing the yarn guide operation, a first unwinding operation of unwinding the yarn from the package by reversely rotating the package is performed,
A second unwinding operation for unwinding the yarn from the package by reversely rotating the package after the yarn guiding device finishes the yarn guiding operation and before the yarn joining device starts the yarn joining operation. And
The yarn guide device sucks the yarn from the package when the winding device performs the second unwinding operation.   A yarn moving device that performs a yarn moving operation for moving the yarn from the package before the winding device starts the second unwinding operation after the yarn guiding device has finished the yarn guiding operation; The yarn winding machine according to claim 1, further comprising:   The yarn winding machine according to claim 2, wherein the yarn moving device moves the yarn from the package toward the center of the winding width of the package by the yarn moving operation.   The yarn winding machine according to any one of claims 1 to 3, wherein the winding device stops reverse rotation of the package between the first unwinding operation and the second unwinding operation.   The length of the yarn that is unwound by the winding device by the second unwinding operation is equal to or longer than the length of the yarn that reaches the yarn joining device from the winding device. The yarn winding machine according to the item.   The yarn winding machine according to any one of claims 1 to 5, further comprising a setting unit that sets a time for the winding device to perform the second unwinding operation. The yarn joining device includes a yarn joining portion that joins the yarn from the yarn feeding device and the yarn from the package, and the yarn from the yarn feeding device and the yarn from the package to the yarn joining portion. A yarn gathering portion that approaches
The winding device is configured so that, after the yarn guide device has finished the yarn guide operation, the yarn feeder unit before bringing the yarn from the yarn feeder and the yarn from the package to the yarn joining unit. The yarn winding machine according to any one of claims 1 to 6, wherein the second unwinding operation is performed. The yarn feeding device includes:
A core yarn supply device for supplying the core yarn;
A draft device for drafting fiber bundles;
The yarn winding machine according to any one of claims 1 to 7, further comprising: an air spinning device that generates the yarn by twisting the fiber bundle using the core yarn as a core.   Control that causes the yarn guiding device to suck the yarn from the package when the winding device performs the second unwinding operation and also causes the winding device to perform the second unwinding operation. The yarn winding machine according to any one of claims 1 to 8, further comprising a controller for performing the operation.

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