JP2020203780A - Thread winding device and bunch forming method - Google Patents

Abstract

To form a bunch winding on a winding tube of a package to make it easier for an operator to find and pull out a thread end.SOLUTION: There is provided a thread winding device in which a winding control unit performs bunch formation control of winding a thread around a winding tube by moving the thread from within a range of a traverse width to the outside of the range at a preset bunch forming twill angle after a thread length measuring unit finishes winding the thread of a required length. The bunch forming twill angle is larger than a winding twill angle.SELECTED DRAWING: Figure 7

Description

The present invention mainly relates to a thread winding device that winds a thread while traversing it.

Conventionally, there has been known a thread winding device in which a winding bobbin is rotatably supported by a cradle and the thread is wound around the outer peripheral surface of the bobbin while being wound to form a package. In some of these types of yarn winders, as shown in Patent Document 1, the yarn guides of the equipment in charge are rotated in the same direction as during the winding process in the standard production of yarn, and the standard on the bobbin. There is a configuration in which the end of the thread is deposited on the outer tube of the standard thread package profile by laterally moving it to the outside of the thread package profile.

The yarn winder disclosed in Patent Document 1 rotates the yarn in the same direction as during the winding process in the standard production of yarn, and then moves the yarn guide of the apparatus in charge of the yarn in the profile of the package. It is deposited on the outer tube.

In this way, the spool winder may control the thread to be deposited on the tube outside the profile of the package.

Japanese Unexamined Patent Publication No. 2018-080057

By the way, in a cone-wound package or the like, an inclination is formed on the small diameter side of the package, so when trying to deposit the yarn on the take-up pipe on the small diameter side, the standard production of the yarn is as shown in FIG. When the operation of moving the guide of the yarn is executed continuously with the winding process in, the bunch formation is performed at the same winding speed and twill angle as the winding process in the standard production of yarn. At this time, if the twill angle is not sufficiently taken, the thread will move to the outside of the take-up tube with the same force and move to the outside of the profile of the package, but the position further exceeds the width of the take-up tube. Will move to. As a result, the thread falls off between the small diameter side support arm that supports the small diameter side of the take-up tube and the take-up tube, and when the take-up tube is removed from the support arm, a ring-shaped thread mass attached to the package is formed. turn into. This lump may cause problems such as threads being pulled out from the package in the package transportation process and the drawn threads being entangled.

The present invention has been made in view of the above circumstances, and an object of the present invention is to ensure that threads are deposited on a winding tube by changing the twill angle by a predetermined winding control.

The problem to be solved by the present invention is as described above, and next, the means for solving this problem and its effect will be described.

From the viewpoint of the present invention, a thread winding device having the following configuration is provided. That is,
The thread winding device is wound by a thread feeding section in which a thread feeding bobbin is supported, a winding section in which a thread drawn from the thread feeding section is wound around a winding tube to form a package, and a winding section. A thread length measuring section that counts the length of the thread taken, and a thread twill bobbin that is provided in the winding section and reciprocates with a traverse width set in the rotation axis direction of the package to guide the thread. A take-up control unit that controls the yarn twill swing portion so that the yarn is wound at a set take-up twill angle, and the take-up control unit has a length required by the yarn length measuring unit. After winding the yarn, the bunch forming control is executed by moving the yarn from within the range of the traverse width to outside the range of the traverse width at a preset bunch forming twill angle to wind the yarn around the take-up pipe. The forming twill angle is larger than the winding twill angle.

In the bunch formation control, the thread is moved from within the range of the traverse width to outside the range at the bunch forming twill angle larger than the winding twill angle, so that when the thread falls from the surface of the package to the take-up tube. The trajectory of the thread is close to a straight line. By dropping the thread from the surface of the package onto the take-up tube on a trajectory close to a straight line in this way, the thread moves to a position that exceeds the width of the take-up tube due to excessive force, and the small diameter of the take-up tube. It is possible to prevent the thread from falling off between the small diameter side support arm that supports the side and the take-up pipe.

In the thread winding device, the thread twill swinging portion includes a thread hooking portion on which the thread is hung and a thread hooking portion.
It is a traverse arm member having a rod-shaped main body portion to which a thread hook portion is attached to one end and a drive source is attached to the other end.

Since the thread is guided by an arm-type traverse member, the angle of the twill can be changed freely. Thereby, the optimum bunch forming twill angle can be set according to the yarn type and the like, and the yarn can be moved from within the range of the traverse width to outside the range.

The thread winding device further includes a thread cutting unit for cutting the thread and a thread splicing device for connecting the thread when the thread is cut, and the winding control unit is connected to the package from the thread length measuring unit. After receiving the notification that the yarn of the required length has been wound, the yarn cutting portion cuts the yarn, the rotation of the package by the winding portion is stopped, and then the yarn is cut by the yarn splicing device. It is characterized in that a thread splicing operation for connecting the warp threads is executed, and then the bunch formation control is executed.

In the thread winding device, after receiving a notification that a thread of a length required for the package has been wound, the thread is cut at the thread cutting portion, and the rotation of the package by the winding portion is stopped. Bunch formation control is executed after the bunch formation is performed. By temporarily stopping the rotation of the package in this way, the movement of the thread in the winding direction is eliminated, and a bunch forming twill angle larger than the winding twill angle can be easily realized. Further, since the yarn is cut when the yarn of the required length is wound in the package, it is possible to prevent the extra yarn from being wound in the package.

In the thread winding device, the winding control unit causes the winding unit to start winding the package between the time when the thread splicing operation is executed and the time when the bunch formation control is executed. It is characterized in that a thread hooking operation for hooking the connected threads on the thread hooking portion of the traverse arm member is executed, and the winding of the package by the winding portion is stopped.

In the thread winding device, it is necessary to rotate the package in the winding direction in order to hook the thread on the thread hooking portion of the traverse arm member. However, after the thread is hooked on the thread hooking portion, the package is further loaded. Since the winding is stopped, a bunch forming twill angle larger than the winding twill angle can be surely realized.

In the thread winding device, the winding control unit uses a preset bunch forming twill angle in the bunch forming control in a state where the winding of the package by the winding unit is stopped. It is characterized in that the yarn is moved from within the range of the traverse width to outside the range. Further, in the thread winding device, the bunch forming twill angle is formed on the surface of the package at the center position of the package in the traverse width direction and the contact roller that supports the package and assists the winding of the thread. It is characterized in that the angle is formed by moving the nipped thread out of the traverse width range at the thread hooking portion.

In the thread winding device, the thread is moved from within the range of the traverse width to outside the range by the bunch forming twill angle set in advance while the winding of the package is stopped. The surface of the package is nipped by the contact roller. By moving the yarn from within the range of the traverse width to outside the range in this state, it is possible to surely realize a bunch forming twill angle larger than the winding twill angle.

In the thread winding device, the package wound by the winding unit is a cone-shaped package, and the winding control unit has a small diameter side of the cone-shaped package on the thread twill swinging portion in the bunch formation control. It is characterized by guiding the thread outside the traverse width of. Further, even if the yarn is moved with the yarn nipped as described above, the yarn is supplied from the yarn feeding bobbin, so that the yarn does not break due to the increase in tension.

In this bunch formation control, the bunch is surely formed even on the small diameter side of the cone-shaped package in which the thread is likely to move to a position exceeding the width of the take-up pipe due to excessive force. Can be done.

In the thread winding device, the winding control unit guides the thread to the outside of the traverse width on the small diameter side of the cone-shaped package in the bunch formation control, and guides the thread to the outside of the traverse width on the small diameter side of the cone-shaped package. After a predetermined thread length is wound on the take-up pipe, the thread twill swing portion is further formed on the thread twill swing portion from the outside of the traverse width on the small diameter side of the cone-shaped package toward the center of the traverse width. It is characterized in that the thread end centering control for guiding the thread is performed.

In this bunch formation control, after a predetermined yarn length is wound on the winding pipe on the small diameter side of the package, the traverse width is further formed on the thread twill swing portion from outside the traverse width on the small diameter side of the cone-shaped package. The thread is guided to the thread twill swinging portion toward the center of the thread. As a result, the thread end portion can be wound around the surface of the package. By wrapping the thread end around the surface of the package, the thread end becomes free and it is possible to prevent the occurrence of a problem of unraveling and dragging in the transport process or the like.

The take-up control unit is characterized in that the yarn cutting unit cuts the yarn at the same time as or after the completion of the centering control of the yarn end.

By keeping the length of the yarn wound around the center of the package to the minimum necessary in the yarn end centering control, the operator can easily find and pull out the yarn end.

In the bunch formation control, the take-up control unit guides the thread out of the traverse width on the small diameter side of the cone-shaped package to the thread twill swing part, and a predetermined thread is placed on the take-up pipe on the small diameter side of the package. It is characterized in that the package is rotated at any number of rotations from 1.75 rotations to 2.25 rotations when the length is wound up.

By rotating at the above-mentioned number of rotations, the thread extending from the take-up tube to the surface of the package is formed at an angle of 90 degrees or less. The crossover yarn formed in this way has the effect of improving work efficiency because it can be easily picked up when the operator picks up the yarn by picking it up with a finger in a subsequent process. Further, when the operator picks up the thread by pinching the bunch formed on the take-up pipe, the bunch can be easily removed and picked up as long as the number of bunch windings is about 2 turns.

A bunch forming method for forming a bunch on the take-up tube of a package in which a thread is wound.
The first step of winding the length required for the package, the second step of causing the cutter to cut the thread and at the same time stopping the winding of the package, and the third step of connecting the cut threads.
The fourth step of engaging the thread with the thread hooking part of the traverse arm member while rotating the package in the thread winding direction, and stopping the thread hooking part of the traverse arm member at the center position in the traverse width direction, and further winding the package. The fifth step to stop the rotation in the direction and
It is characterized by comprising a sixth step of moving the thread hook portion of the traverse arm member supplemented with the thread to a bunch forming position outside the standard traverse width for winding the thread on the surface of the package.

It is a bunch forming method, further comprising a seventh step of moving a thread hook portion of a traverse arm member from a bunch forming position outside a standard traverse width to a package center having a standard traverse width.

When forming a bunch by the above method, since the thread is moved from within the range of the traverse width to outside the range at the bunch forming twill angle larger than the winding twill angle, the thread is transferred from the surface of the package to the take-up tube. The trajectory of the thread when the water chestnut falls is close to a straight line. By dropping the thread from the surface of the package onto the take-up tube on a trajectory close to a straight line in this way, the thread moves to a position that exceeds the width of the take-up tube due to excessive force, and the small diameter of the take-up tube. It is possible to prevent the thread from falling off between the small diameter side support arm that supports the side and the take-up pipe.

The front view of the automatic winder which concerns on one Embodiment of this invention. Front view and block diagram of the winder unit. Schematic side view of the traverse device. Schematic front view of the traverse device. Schematic front view of the traverse device. Conventional bunch formation. Schematic front view of the traverse device. At the start of bunch formation control. Schematic front view of the traverse device. During bunch formation in bunch formation control. Schematic front view of the traverse device. At the start of thread end centering control. Schematic front view of the traverse device. At the end of thread end centering control. At the end of bunch formation control. Flow chart of bunch formation control and thread end centering control. Detailed flowchart of bunch formation control. Detailed flowchart of thread end centering control.

Next, an embodiment of the invention will be described. First, the overall configuration of the automatic winder (thread take-up device) 1 of the present embodiment will be described with reference to FIG. FIG. 1 is a front view of an automatic winder 1 according to an embodiment of the present invention. In the present specification, the terms "upstream" and "downstream" mean upstream and downstream in the traveling direction of the yarn at the time of winding the yarn.

As shown in FIG. 1, the automatic winder (thread winding device) 1 includes a plurality of winder units 10 arranged side by side, an automatic ball lifting device 80, and a machine stand control device 90 as main configurations. ..

Each winder unit 10 is configured so that the yarn 20 unwound from the yarn feeding bobbin 21 can be wound while traversing to form a package 30.

When the package 30 is full in each winder unit 10, the automatic ball lifting device 80 travels to the position of the winder unit 10, collects the full package 30, and can supply an empty bobbin. It is configured as follows.

The machine stand control device 90 includes an operation unit 91 and a display unit 92 as main configurations. The operation unit 91 can make settings for each winder unit 10 by the operator inputting a predetermined set value or selecting an appropriate control method. The display unit 92 is configured to be able to display the winding status of the thread 20 of each winder unit 10, the content of the trouble that has occurred, and the like.

Next, the detailed configuration of the winder unit 10 will be described with reference to FIG. FIG. 2 is a front view and a block diagram of the winder unit.

As shown in FIG. 2, each winder unit 10 includes a take-up unit main body 16 and a unit control unit 50.

The unit control unit 50 includes, for example, a CPU and a ROM. A program for controlling each configuration of the winding unit main body 16 is stored in the ROM. The CPU executes the program stored in this ROM. Further, the unit control unit 50 includes a calculation unit 71, a twill angle pattern storage unit 72, and a winding control unit 73. The detailed configurations of these will be described later.

The winding unit main body 16 unwinds the yarn in the thread traveling path between the yarn feeding bobbin 21 and the winding bobbin (winding pipe) 22 in order from the yarn feeding portion 100 side on which the yarn feeding bobbin 21 is supported. The bobbin assist device 12, the tension applying device 13, the splicer device (thread splicing device) 14, the thread length detection sensor (thread length measuring unit) 61, the clearer (thread quality measuring device) 15, and the winding unit 17. , Are arranged.

In the thread unwinding assisting device 12, the thread 20 unwound from the thread feeding bobbin 21 is swung around to bring the regulating member 40 into contact with the balloon formed on the upper part of the thread feeding bobbin 21, and the balloon is brought into an appropriate size. This is for assisting the unwinding of the thread 20 by controlling the thread 20 to. A sensor (not shown) for detecting the chase portion of the thread feeding bobbin 21 is provided in the vicinity of the regulating member 40, and when this sensor detects a descent of the chase portion, the regulating member 40 is subjected to the detection. For example, it can be lowered by an air cylinder (not shown).

The tension applying device 13 applies a predetermined tension to the running thread 20. As the tension applying device 13, for example, a gate type device in which movable comb teeth 37 are arranged with respect to fixed comb teeth 36 can be used. The comb teeth 37 on the movable side can be rotated by, for example, a solenoid 38 configured in a rotary manner so that the comb teeth are in an meshed state or an released state. The tension applying device 13 can apply a constant tension to the wound yarn 20 to improve the quality of the package 30. In addition to the gate type, for example, a disc type can be adopted as the tension applying device 13.

The splicer device 14 (thread splicing device) is used when the clearer 15 detects a thread defect and cuts the thread 20 with the cutter (thread cutting portion) 39, or when the thread breaks during unwinding from the thread feeding bobbin 21. Etc., the bobbin thread on the feed bobbin 21 side and the upper thread on the package 30 side are spliced together. As the thread splicing device for splicing the upper thread and the bobbin thread, a mechanical type or a device using a fluid such as compressed air can be used.

The thread length detection sensor (thread length measuring unit) 61 is a device that detects the thread length of the thread 20 wound around the package 30 in a non-contact manner. The yarn length detection sensor 61 is configured to detect the amount of fluff of the yarn 20, calculate the amount of movement of the yarn 20, and detect the yarn length. Specifically, the thread length detection sensor 61 includes a plurality of optical fluff detection units including a light receiving element and a light source along the thread traveling direction. Then, the running length of the yarn 20 is detected based on the change in the output signal of the fluff detection unit at different positions in the yarn running direction.

The clearer 15 includes a clearer head 49 in which a sensor (not shown) for detecting the thickness of the thread 20 is arranged, and an analyzer 53 that processes a thread thickness signal from the sensor. The clearer 15 is configured to detect a thread defect such as a slab by monitoring a thread thickness signal from the sensor. A cutter 39 for immediately cutting the yarn 20 when the clearer 15 detects a yarn defect is provided in the vicinity of the clearer head 49. The analyzer 53 may be provided in the unit control unit 50.

On the lower and upper sides of the splicer device 14, the bobbin thread guide pipe 25 that captures the bobbin thread on the thread feeding bobbin 21 side and guides it to the splicer device 14, and the splicer device 14 that captures the upper thread on the package 30 side. A needle thread guide pipe 26 for guiding the needle is provided. Further, the bobbin thread guide pipe 25 and the needle thread guide pipe 26 are configured to be rotatable about the shafts 33 and 35, respectively. A suction port 32 is formed at the tip of the bobbin thread guide pipe 25, and a suction mouse 34 is provided at the tip of the needle thread guide pipe 26. An appropriate negative pressure source is connected to the bobbin thread guide pipe 25 and the needle thread guide pipe 26, respectively, and a suction flow is generated in the suction port 32 and the suction mouse 34 to connect the thread ends of the needle thread and the bobbin thread. It is configured to be able to suck and capture.

The take-up unit main body 16 has a cradle 23 that detachably supports the take-up bobbin (winding tube) 22 and a contact roller that is driven and rotatable in contact with the peripheral surface of the take-up bobbin 22 or the peripheral surface of the package 30. 29 and. Further, the winding unit main body 16 is provided with an arm-type traverse device 27 in the vicinity of the cradle 23 for traversing the thread 20 to the surface of the package 30, and the traverse device 27 traverses the thread 20 to the package 30. It is configured so that the thread 20 can be wound up.

The winding unit 17 includes a cradle 23, a package drive motor (package drive unit) 41, and a traverse device (thread twill vibration unit) 27 as main configurations.

The cradle 23 includes a small diameter side support arm 23a that supports the small diameter side of the cone-shaped (tapered) winding bobbin 22 and a large diameter side support arm 23b that supports the large diameter side of the winding bobbin 22. Have. The cradle 23 is configured to rotatably support the cone-shaped winding bobbin 22 by gripping the cone-shaped winding bobbin 22 by the small-diameter side support arm 23a and the large-diameter side support arm 23b. ing.

The cradle 23 is configured to be rotatable around a rotation shaft 48, and the cradle 23 rotates as the yarn layer diameter of the package 30 increases as the yarn 20 is wound around the winding bobbin 22. It is configured to be absorbed by. That is, even if the yarn layer diameter of the package 30 changes due to the winding of the yarn 20, the surface of the package 30 can be appropriately brought into contact with the contact roller 29. Further, the cradle 23 and the traverse device 27 are configured so that the cone-shaped package 30 can be formed as shown in FIG. 2 by winding the thread 20 around the cone-shaped winding bobbin 22.

A package drive motor 41 composed of a servomotor is attached to the cradle 23, and the take-up bobbin 22 is rotationally driven by the package drive motor 41 to drive the surface of the take-up bobbin 22 (or the package 30). The thread 20 is wound around the surface of the thread 20). When the take-up bobbin 22 is supported by the cradle 23, the motor shaft of the package drive motor 41 is connected to the take-up bobbin 22 so as not to rotate relative to each other (so-called direct drive method). The operation of the package drive motor 41 is controlled by the unit control unit 50. A package drive motor control unit independent of the unit control unit 50 may be provided, and the operation of the package drive motor 41 may be controlled by the package drive motor control unit.

Next, the traverse device 27 will be described. The traverse device 27 includes a traverse arm member 28, a traverse arm drive motor (twill swing drive unit) 45, and a thread guide member 52 as main configurations. 3 and 4 are a schematic side view and a front view of the traverse device 27.

The traverse arm member 28 is configured as an elongated arm that is configured to be rotatable around a support shaft. A thread hook portion 11 is connected to the tip of the traverse arm member 28. The thread hook portion 11 is formed in a hook shape so that the thread 20 can be engaged with the thread hook portion 11. On the other hand, the base end side of the traverse arm member 28 is fixed to the drive shaft 45a of the traverse arm drive motor 45. The traverse arm drive motor 45 is for driving the traverse arm member 28, and is composed of a servo motor. As the servo motor, an appropriate motor such as a brushless DC motor, a stepping motor, or a voice coil motor can be used.

The traverse device 27 drives the traverse arm drive motor 45 in a state where the thread 20 is engaged with the thread hook portion 11 to reciprocate the traverse arm member 28 as shown by the arrow in FIG. The portion 11 is reciprocated left and right (in the winding width direction of the package 30), and the thread 20 is traversed to the package surface in the left and right direction. As a result, the thread 20 is wound around the winding bobbin 22 while being twilled to a predetermined winding width at a predetermined speed, and a thread layer formed on the outer peripheral surface of the winding bobbin 22 is formed at a desired density. be able to.

The operation of the traverse arm drive motor 45 is controlled by the take-up control unit 73. However, the operation of the traverse arm drive motor 45 may be controlled by the unit control unit 50, or may be controlled by providing a dedicated twill swing control unit. Further, a thread guide member 52 is arranged on the upstream side in the thread traveling direction with respect to the thread hooking portion 11. The thread guide member 52 can catch the thread 20 by the thread hooking portion 11 by bending the thread path of the thread 20 on the upstream side of the thread guide member 52 toward the contact roller 29. It is for guiding you so that you can do it.

Further, as shown in FIG. 3, the drive shaft 45a of the twill arm drive motor 45 is upstream of the thread guide member 52 when viewed in the direction of a straight line connecting one end side and the other end side of the traverse stroke. It is arranged so that the angle is close to parallel to the thread path of the thread 20 on the side (the extension line of the drive shaft 45a and the thread path of the thread 20 form an acute angle). Further, when viewed in the direction of a straight line connecting one end side and the other end side of the traverse stroke, the virtual line connecting the base end portion of the traverse arm member 28 and the thread hook portion 11 is more than the thread guide member 52. It is arranged so as to be substantially orthogonal to the extension line of the thread path of the thread 20 on the upstream side. Here, the thread path of the thread 20 is substantially perpendicular to the installation surface of the winder unit 10 (horizontal plane in the case of the present embodiment). Therefore, in the automatic winder 1 of the present embodiment, the thread hooking portion 11 is configured to reciprocate in a plane substantially parallel to the installation surface of the winder unit 10 (horizontal plane in the case of the present embodiment).

Next, the process performed when the automatic winder 1 completes the winding of the package 30 will be described with reference to FIGS. 4 to 9. FIG. 5 is a schematic diagram for explaining bunch formation that has been conventionally performed. FIG. 6 is a schematic diagram for explaining the start time of bunch formation control in the present invention. FIG. 7 is a schematic view for explaining a state in which the bunch formation control in the present invention is activated to form a bunch. FIG. 8 is a schematic view for explaining the start time of the thread end centering control in the present invention. FIG. 9 is a schematic view for explaining the end time of the thread end centering control in the present invention.

The winding control unit 73 of the automatic winder unit 10 of the present invention calculates the length of the yarn wound as the package 30 based on the yarn length detected by the yarn length detection sensor 61. When the calculated yarn length reaches the length required for the package 30 (full winding length), the take-up control unit 73 causes the cutter 39 to cut the yarn, and at the same time sends a stop signal to the package drive motor 41. This will stop the winding of the package 30.

The bunch formation control can set the execution ON / OFF in advance, and when the execution is OFF, the bunch formation control lifts the package 30 that has reached the full winding length and winds the thread. Winding of a new package is restarted by setting the unwound winding tube 22.

When the execution of the bunch formation control is ON, the bunch formation is executed for the package 30 that has reached the full winding length. Hereinafter, the bunch formation control of the present invention will be described with reference to the schematic views and flowcharts of FIGS. 6 to 12.

This will be described based on the flowchart of FIG. As described above, the winding control unit 73 of the automatic winder unit 10 of the present invention winds the yarn until the yarn length calculated by the yarn length detection sensor 61 reaches the length required for the package 30 (full winding length). Continue the work (FIGS. 10, S1, S2).

When the calculated yarn length detected by the yarn length detection sensor 61 reaches the length (full winding length) required for the package 30 (S2, YES), the take-up control unit 73 puts the yarn in the cutter 39. The winding of the package 30 is stopped by disconnecting (S3) and simultaneously sending a stop signal to the package drive motor 41 (S4).

When the execution of the bunch formation control is ON (S201, YES), the bunch formation is executed for the package 30 that has reached the full winding length.
In the bunch formation control, first, the thread splicing for connecting the cut threads is executed (S5), and then the bunch formation control is executed (S6). The details of bunch formation control will be described later.

After the bunch formation control (S6) is executed, ON / OFF of the thread end centering control (S7) execution is confirmed (S202). ON / OFF of the execution of the thread end centering control (S7) can be set in advance.

When the thread end centering control (S7) is ON (S202, YES), the thread end centering control (S7) is executed. The details of the thread end centering control will be described later. After the yarn end centering control (S7) is completed, the take-up control unit 73 causes the cutter 39 to cut the yarn, and at the same time, sends a stop signal to the package drive motor 41 to stop the take-up of the package 30.

The spool winding device 1 of the present embodiment can make the following settings for the winding control unit 73. Whether or not bunch formation control is performed when the calculated yarn length reaches the length (full winding length) required for the package 30 (S201). Presence / absence of thread end centering control after bunch formation control (S202). Whether or not the package rotates when the thread hook portion 11 of the traverse arm member 28 is moved to the bunch formation position at the start of the bunch formation control (S6).
Bunch formation rotation speed. The number of central winding rotations during centering control (S7).

Next, the bunch formation control will be described in detail with reference to the flowchart of FIG.
When the bunch forming control is started, the take-up control unit 73 first applies the bunch forming tension necessary for bunch forming to the yarn 20 by the tension applying device 13 (S11).
Next, the take-up control unit 73 executes a thread hooking operation, and engages the thread 20 with the thread hook portion 11 of the traverse arm member 28 while rotating the package 30 in the thread winding direction (S12).

When the package rotation stop when moving the thread hook portion 11 of the traverse arm member 28 to the bunch formation position is set to be present at the start of the bunch formation control (S6) (S13, YES), the take-up control unit 73 traverses. The thread hooking portion 11 of the arm member 28 is stopped at the center position in the traverse width direction (S14), and the rotation of the package 30 in the thread winding direction is stopped.

Next, the take-up control unit 73 moves the thread hook portion 11 of the traverse arm member 28 to a bunch forming position outside the standard traverse width for winding the thread on the surface of the package 30 (S16, FIG. 6). At this time, the thread is nipped into the surface of the package 30 at the center position of the package 30 and the contact roller 29 that supports the package 30 and assists in winding the thread, and in that state, the thread is hooked on the thread hooking portion. At 11, it is moved to the outside of the traverse width range. Even if the yarn is moved with the yarn nipped as described above, the new yarn is supplied from the yarn feeding bobbin, so that the yarn does not break due to the increase in tension.

The bunch forming twill angle θ2 formed by the above operation becomes a larger angle than the winding twill angle θ at the time of normal winding. By forming such a large bunch forming twill angle θ2 and moving the thread from the center of the package 30 to the outside of the standard traverse width, the thread when the thread falls from the surface of the package 30 onto the take-up tube 22. The orbit of is close to a straight line. A thread is dropped from the surface of the package 30 onto the take-up pipe 22 on a trajectory close to a straight line (a trajectory along the radial direction of the package). As a result, the thread moves to a position that exceeds the width of the take-up tube 22 due to excessive force, and the thread is between the small-diameter side support arm 23a that supports the small-diameter side of the take-up tube 22 and the take-up tube 22. Can be prevented from falling off. In the prior art, the twill angle indicates the angle of the yarn formed by traversing while winding the yarn by the package 30, but the bunch forming twill angle θ2 of the present invention is the package stopped as described above. It is a concept including the angle of the thread formed when the thread nipped in the surface of the 30 and the contact roller 29 is moved to the outside of the traverse width range by the thread hooking portion 11.

The take-up control unit 73 moves the thread hook portion 11 of the traverse arm member 28 to a bunch forming position outside the standard traverse width for winding the thread on the surface of the package 30, and then sets a preset bunch. The package 30 is rotated at the forming speed (S17). This rotation forms a bunch 300 on the take-up tube 22. After driving the package 30 a predetermined number of rotations (S18, YES), the take-up control unit 73 ends the bunch formation control (S6) and shifts to the next step.

The take-up control unit 73 confirms whether or not the yarn end centering control (S7) is performed after the bunch formation control (S6). When the thread end centering control (S7) is set to be enabled (S202, YES), the thread hook portion 11 of the traverse arm member 28 is moved from the bunch forming position outside the standard traverse width to the standard traverse width. It is moved to the package center, which is the center of the above, and stopped (S21, FIG. 8, FIG. 9). At this time, since the package 30 is rotating at the bunch forming speed in S17, the central bunch 400 is formed in the center of the package 30. The thread hooking portion 11 of the traverse arm member 28 is stopped at the package center, but after the thread is completely wound up, the traverse arm member 28 is retracted to one end side in the package width direction.

The take-up control unit 73 moves the thread hook portion 11 of the traverse arm member 28 to the package center, further drives the package 30 a predetermined number of rotations (S22, YES), and then ends the bunch formation control (S6). .. After the bunch formation control (S6) is completed, the take-up control unit 73 causes the cutter 39 to cut the thread (S8), and at the same time sends a stop signal to the package drive motor 41 to stop the take-up of the package 30 (S8). ).

In the present embodiment, the number of rotations is used as a reference in the condition determination of (S18) and (S22), but the number of rotations does not have to be an integer value. For example, a fraction may be included such as 2 times + 1/4 rotation (2.25 rotations). When the bunch 300 actually formed in the bunch formation control (S6) is formed from 1 rotation + 3/4 rotation (1.75 rotation) to 2 rotation + 1/4 rotation (2.25 rotation), it is formed from the surface of the package 30. The thread extending over the take-up tube 22 and the thread extending from the take-up tube 22 to the surface of the package 30 are formed at an angle of 90 degrees or less. The crossover yarn formed in this way has the effect of improving work efficiency because it can be easily picked up when the operator picks up the yarn by picking it up with a finger in a subsequent process. Further, when the operator picks up the thread by pinching the bunch 300 formed on the take-up pipe 22, the bunch can be easily removed and picked up as long as the number of bunch windings is about 2 turns. Furthermore, it can be controlled not by the number of rotations but by the rotation angle. When controlling by the rotation angle, the above range is 630 degrees to 810 degrees.

The rotation time of the package 30 can be used as a reference instead of the rotation speed described above. Further, since the bunch formation control (S6) and the thread end centering control (S7) can be individually switched to be executed or not, for example, the bunch 300 can be placed on the take-up pipe 22 on the small diameter side by the bunch formation control (S6). It is also possible to form the ball, end the process there, and move to the next step, the ball-lifting step.

According to the present invention, in the bunch formation control (S6), the yarn is moved from within the range of the traverse width to outside the range at the bunch forming twill angle θ2 larger than the winding twill angle θ. When the thread falls from the surface to the take-up tube 22, the trajectory of the thread becomes a shape close to a straight line. By dropping the thread from the surface of the package 30 onto the take-up tube 22 on a trajectory close to a straight line in this way, the thread moves to a position that exceeds the width of the take-up tube 22 due to excessive force, and the take-up tube 22 is used. It is possible to prevent the thread from falling off between the small diameter side support arm 23a that supports the small diameter side of the pipe 22 and the take-up pipe 22.

Since the thread is guided by the traverse arm member 28, the twill angle can be freely changed. As a result, the optimum bunch forming twill angle θ2 can be set according to the yarn type and the like, and the yarn can be moved from within the range of the traverse width to outside the range.

In the thread winding device, after receiving a notification that a thread of a required length has been wound around the package 30, the thread is cut at the thread cutting portion, and the package 30 is rotated by the winding portion. Bunch formation control is executed after stopping. By temporarily stopping the rotation of the package 30 in this way, the movement of the thread in the winding direction is eliminated, and a bunch forming twill angle θ2 larger than the winding twill angle can be easily realized.

In the thread winding device, the package 30 needs to be rotated in the winding direction in order to hook the thread on the thread hooking portion 11 of the traverse arm member. However, after hooking the thread on the thread hooking portion 11, Further, since the winding of the package 30 is stopped, the bunch forming twill angle θ2 larger than the winding twill angle can be surely realized.

In the thread winding device, the thread is moved from within the range of the traverse width to outside the range by the bunch forming twill angle θ2 set in advance while the winding of the package 30 is stopped. The thread is nipped from the surface of the package 30 by the contact roller 29. By moving the yarn from within the range of the traverse width to outside the range in this state, it is possible to reliably realize a bunch forming twill angle θ2 larger than the winding twill angle.

In this bunch formation control, the bunch is surely formed even on the small diameter side of the cone-shaped package 30 in which the thread is likely to move to a position exceeding the width of the take-up pipe 22 due to excessive force. Can be done.

In this bunch formation control, after a predetermined yarn length is wound on the winding pipe 22 on the small diameter side of the package 30, the thread twill swing portion is further outside the traverse width on the small diameter side of the cone-shaped package 30. The thread is guided to the thread twill swinging portion from the center toward the center of the traverse width. As a result, the thread end portion can be wound around the center of the package 30. By wrapping the yarn end around the surface of the package 30, the yarn end becomes free and it is possible to prevent the occurrence of a problem of unraveling and dragging in the transport process or the like.

By keeping the length of the thread wound around the center of the package 30 to the minimum necessary in the thread end centering control (S7), the operator can easily find and pull out the thread end.

The present invention is very effective in forming the bunch 300 on the small diameter side of the cone-shaped package 30, but is not limited thereto. It is also effective when forming the bunch 300 on the small diameter side of the cone-shaped package 30 and when forming the bunch 300 on the cheese package 30 in which the thread layers are wound in parallel.

Further, the present invention can be applied not only to an automatic winder but also to other yarn winding devices such as a rewinding machine and a spinning machine (for example, an air spinning machine and an open-end spinning machine).

1 Automatic winder (thread take-up device)
10 Winder unit 14 Splicer device (thread splicing device)
17 Winding part 20 Thread 21 Thread feeding bobbin 27 Traverse device 28 Traverse arm member 30 Package 41 Package drive motor (package drive part)
45 Twill swing arm drive motor (Twill swing drive unit)
50 Unit control unit 61 Thread length detection sensor (thread length measurement unit)
71 Calculation unit 72 Twill angle pattern storage unit 73 Winding control unit 100 Thread feeding unit

Claims (14)

The thread feeding part where the thread feeding bobbin is supported and
A winding section in which a thread drawn from the thread feeding section is wound around a winding tube to form a package, and a winding section.
A yarn length measuring unit that counts the length of the yarn wound by the winding unit and a traverse width provided in the winding unit and set in the rotation axis direction of the package reciprocate to guide the yarn. It is provided with a thread twill swinging section and a winding control section that controls the thread twilling section so that the thread is wound at a set winding twill angle.
After the yarn length measuring unit finishes winding the yarn of the required length, the winding control unit moves the yarn from within the range of the traverse width to outside the range with a preset bunch forming twill angle. A thread winding device for executing a bunch forming control for winding a thread around the winding tube, wherein the bunch forming twill angle is larger than the winding twill angle. The thread twill swinging part
The thread hooking part on which the thread is hung and
A rod-shaped main body with a thread hook attached to one end and a drive source attached to the other end.
The thread winding device according to claim 1, further comprising a traverse arm member. The thread cutting part that cuts the thread and
Further equipped with a thread splicing device that connects the thread when the thread is cut,
After receiving the notification from the yarn length measuring unit that the yarn of the length required for the package has been wound, the winding control unit causes the yarn cutting unit to cut the yarn, and the winding unit cuts the yarn. The yarn winding according to claim 1 or 2, wherein after stopping the rotation of the package, a yarn splicing operation for connecting the yarns cut by the yarn splicing device is executed, and then the bunch formation control is executed. Threading device. The take-up control unit causes the take-up unit to start winding the package and connects the connected threads to the traverse arm member between the time when the thread joining operation is executed and the time when the bunch formation control is executed. The thread winding device according to claim 3, wherein the thread hooking operation for hooking the thread hooking portion is executed, and the winding of the package by the winding portion is stopped. In the bunch formation control, the take-up control unit ranges the yarn from the range of the traverse width at a bunch-forming twill angle set in advance in a state where the take-up of the package by the take-up unit is stopped. The thread winding device according to claim 4, wherein the spool is moved to the outside. In the thread winding device, after receiving a notification that a thread of a length required for the package has been wound, the thread is cut at the thread cutting portion, and the rotation of the package by the winding portion is stopped. The thread winding device according to any one of claims 1 to 5, wherein the bunch formation control is executed after the bunch is formed. In the thread winding device, the winding control unit causes the winding unit to start winding the package between the time when the thread splicing operation is executed and the time when the bunch formation control is executed. The thread winding device according to claim 6, wherein a thread hooking operation for hooking the connected threads on the thread hooking portion of the traverse arm member is executed, and the winding of the package by the winding portion is stopped. .. The bunch forming twill angle is a thread nipped in the surface of the package at the center position of the package in the traverse width direction and a contact roller that supports the package and assists in winding the thread at the thread hooking portion. The yarn winding device according to claim 6 or 7, wherein the angle is formed by moving the yarn winding device out of the range of the traverse width. The package wound by the winding unit is a cone-shaped package.
The winding control unit according to any one of claims 1 to 8, wherein the winding control unit guides the thread to the outside of the traverse width on the small diameter side of the cone-shaped package in the bunch formation control. The described thread take-up device. In the bunch formation control, the take-up control unit guides the yarn out of the traverse width on the small diameter side of the cone-shaped package by the thread twill swinging portion, and the predetermined yarn is placed on the take-up pipe on the small diameter side of the package. After the length is wound up, the thread end centering is further guided to the thread twill swinging portion from the outside of the traverse width on the small diameter side of the cone-shaped package toward the center of the traverse width. The thread winding device according to claim 9, wherein the yarn winding device is controlled. The thread winding device according to claim 10, wherein the winding control unit causes the thread cutting unit to cut the thread at the same time as or after the completion of the centering control of the thread end. In the bunch formation control, the take-up control unit guides the yarn out of the traverse width on the small diameter side of the cone-shaped package by the thread twill swinging portion, and a predetermined yarn is placed on the take-up pipe on the small diameter side of the package. The thread winding device according to claim 10 or 11, wherein when the length is wound, the package is rotated at any number of rotations from 1.75 rotations to 2.25 rotations. A bunch forming method for forming a bunch on the take-up pipe of a package in which a thread is wound.
The first process of winding the length required for the package 30 and
The second process, in which the cutter cuts the thread and at the same time stops the winding of the package,
The third process of connecting the cut threads and
The fourth step of engaging the thread with the thread hook of the traverse arm member while rotating the package in the thread winding direction,
The fifth step of stopping the thread hooking portion of the traverse arm member at the center position in the traverse width direction and further stopping the rotation of the package in the thread winding direction.
It is characterized by comprising a sixth step of moving the thread hook portion of the traverse arm member supplemented with the thread to a bunch forming position outside the standard traverse width for winding the thread on the surface of the package. The bunch forming method according to claim 13.
It is further provided with a seventh step of moving the thread hook portion of the traverse arm member from the bunch forming position outside the standard traverse width to the package center having the standard traverse width.

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