JP2002096970A - Device and method for manufacturing yarn package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and method for manufacturing a yarn package capable of forming a tail bunch with the desired number of turns and preventing troubles such as the failure to obtain the yarn length needed for a yarn terminating process, the unreeling of the tail bunch formed at the end of the bobbin, which may occur if the tail bunch hangs down from a winding bobbin, and the failure to perform a smooth yarn terminating process because of entanglement of the yarn in a conveying truck or a yarn terminating process device. SOLUTION: The device for manufacturing a yarn package includes a yarn winding means for winding a yarn around a bobbin; a tail bunch forming means which regulates traversing-in of the yarn wound around the bobbin; and a means for controlling the tail bunch, which is formed when the yarn is shifted from a full bobbin to another empty bobbin, to the desired number of turns, starting from the time when the yarn is captured in a slit or a yarn capturing part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for manufacturing a turret type yarn package in which a plurality of bobbin holders are sequentially switched to wind a yarn continuously, and more particularly, a slit groove is provided at an end. When the yarn is switched by a yarn package manufacturing apparatus having a bobbin or a yarn catching portion formed by a joining portion where end surfaces of a short bobbin and a short bobbin for yarn switching come into contact with each other, the slit groove or the yarn is used. The present invention relates to an apparatus and a method for manufacturing a yarn package in which a yarn is captured by a capturing section to form a tail bunch.

[0002]

2. Description of the Related Art Generally, a synthetic fiber yarn spun from a spinning machine is wound by, for example, an automatic turret type yarn winding machine as shown in FIG.

The automatic turret type winder described above has a plurality of bobbin holders 2 rotatably mounted thereon, and a turret board 4 rotatably mounted on the machine frame 1 and a yarn emptied from a full bobbin. A yarn switching mechanism provided on the turret board 4 so as to be located between a full bobbin and an empty bobbin in order to regulate the yarn path at a position where the yarn is not traversed by a traverse guide (not shown) when switching to the bobbin. 9, a traverse device 5 installed below the bobbin holder 2, or a contact pressure roller 6 for applying a predetermined surface pressure by contacting a yarn wound on the bobbin 3, and a traverse device 5 or a contact pressure. A tail bunch forming mechanism 11 for forming a tail bunch at a predetermined position on the bobbin 3 provided below the roller 6;
And a thread hooking mechanism 10 for hooking a thread on an empty bobbin.

In the above-described yarn switching mechanism 9, the turret board 4 is rotated, the yarn is moved off from the traverse guide by a yarn moving guide (not shown), and the yarn moved to the bobbin end is moved to the tail bunch forming position. A yarn path regulation guide (not shown) for regulation is provided.

The tail bunch forming mechanism 11 moves the yarn removed from the traverse guide to the bobbin end,
A yarn pulling guide for guiding the yarn to the tail bunch forming position, and a yarn guided to the tail bunch forming position by the yarn pulling guide run on a vertical line of a slit groove (not shown) formed at the end of the empty bobbin. Guide (not shown) for guiding the traverse guide, and a traverse-in regulating guide (not shown) for regulating the yarn with a yarn path on a vertical line of the slit groove so that the yarn is not caught by the traverse guide and traversed. Z). In addition,
The projecting / retracting operation of the traverse-in restriction guide uses an air actuator as a driving source.

The yarn hooking mechanism 10 makes the yarn running between the yarn path regulating guide and the traverse-in regulating guide contact the peripheral surface of the rotating empty bobbin, and catches the yarn in the slit groove. (Not shown), and an arm 23 for rotating the threading guide between a standby position and a threading operation position. Generally, an air actuator is used as a rotation drive source of the arm 23.

The tail bunch is formed on the bobbin 3 for a predetermined period of time by a timer which is started when the operation of the thread hooking mechanism 10 (rotation of the arm 23) is started. By releasing the restriction, the yarn is captured by the traverse guide while forming a transfer tail on the bobbin 3,
The winding of the yarn onto the empty bobbin is started.

[0008]

In such a conventional tail bunch forming method, the timing at which the yarn is caught in the slit groove is assumed and desired from the winding speed of the yarn and the operating speed of the yarn hooking mechanism. The timer is set so that the tail bunch has a number of turns.For example, when a recycle bobbin is used, the slit groove is widened by using the recycle bobbin several times, and the catching property of the yarn is deteriorated. In some cases, the capture timing of the camera is delayed, and the number of turns of the tail bunch may be reduced. Therefore, it is necessary to adjust a timer that is set sequentially to an optimum value.

Further, if a driving loss due to running out of grease or the like occurs in the components around the yarn hooking mechanism of the yarn winding machine due to long-time operation, the yarn hooking timing on the bobbin by the yarn hooking guide is a predetermined time. In some cases, there is a problem that a tail bunch having a desired number of turns cannot be obtained because the speed becomes slower than that.

On the other hand, when manufacturing a yarn package using synthetic fiber yarns, a yarn winding machine is used to manufacture the yarn package in consideration of the convenience of drawing and using the yarn in a customer or in a subsequent process. After winding, the so-called yarn end processing for fixing the yarn end portions on the surface layer side and the inner layer side of the wound body at a predetermined position is performed. Due to the rationalization of production, automation by processing equipment has been promoted from conventional manual work by skilled workers.

If the number of turns of the tail bunch of the yarn package is small when processing is performed by such an automatic processing apparatus, the yarn length required for yarn end processing cannot be obtained, or FIG.
If the number of windings of the tail bunch is large as shown in the figure, the tail bunch hanging from the take-up bobbin during the transportation of the production process may be entangled with other yarn packages or carriages, preventing normal processing, resulting in yarn end processing. Success rate may decrease.

As described above, in the method of setting the bunch timer and forming the tail bunch by assuming in advance the timing at which the slit groove catches the yarn at the time of yarn switching, the assumed yarn hooking timing and the yarn at the actual slit groove are used. It is difficult to adjust the number of turns of the tail bunch with high accuracy due to a shift in the capture timing.

[0013] An object of the present invention is to provide an automatic turret type yarn package manufacturing apparatus, which is superior in the yarn trapping performance of a slit groove or a thread provided on a bobbin used for winding a yarn. Regardless of the change over time of the hooking mechanism, a tail bunch having a desired constant number of turns can be formed, and the number of turns of the tail bunch is small, so that the yarn length required for yarn end processing cannot be obtained, or the tail bunch cannot be obtained. Due to the large number of turns, the tail bunch hangs down from the winding bobbin during the transportation of the production process, and the tail bunch formed at the end of the bobbin is not unwound due to being entangled with another yarn package, And a yarn package manufacturing apparatus capable of preventing a trouble that the yarn end processing cannot be performed smoothly due to entanglement with the yarn end processing apparatus. It is to provide a manufacturing method.

[0014]

To solve the above-mentioned problems, the present invention adopts the following constitution. (1) The yarn is captured by a slit groove provided on the bobbin or a yarn catching portion formed by a joining portion where the end surfaces of the bobbin and the yarn switching bobbin abut against each other, and the yarn is continuously wound. A yarn package manufacturing apparatus for hanging a yarn on a bobbin, a tail bunch forming means for regulating traverse-in of the yarn hung on the bobbin, and a full bobbin winding the yarn. A thread bunch formed at the time of switching from the bobbin to the empty bobbin, the thread bunch is provided with a means for controlling the number of windings to a desired number based on the time when the yarn is caught by the slit groove or the yarn catching portion. manufacturing device.

(2) A yarn winding tension detecting means for detecting a tension change occurring at the moment when the yarn is captured by the slit groove or the yarn capturing portion. Manufacturing equipment for yarn packages.

(3) The yarn package manufacturing apparatus according to (2), further comprising means for comparing a tension waveform obtained by the yarn winding tension detecting means with a predetermined threshold value. .

(4) The intersection point where the steeply changed tension waveform and the threshold cross each other is defined as the moment when the yarn is captured by the slit groove or the yarn capturing portion, and the intersection is used as a base point to form a tail bunch having a desired number of windings. 4. The yarn package manufacturing apparatus according to claim 3, further comprising a tail bunch winding number control means for releasing the traverse-in regulation of the yarn by the tail bunch forming means after a predetermined time has elapsed.

(5) A method for manufacturing a yarn package, comprising using the yarn package manufacturing apparatus according to any one of (1) to (4).

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The yarn package manufacturing apparatus according to the present invention, as described in (1) above, has a slit in which a bobbin is provided, or a bobbin and a bobbin for thread switching in which the end faces of the bobbin are in contact with each other. In a yarn package manufacturing apparatus of an automatic switching type that captures a yarn in a yarn catching section formed by a section and continuously winds the yarn, a yarn hooking means for hanging the yarn on a bobbin; Tail bunch forming means for regulating the traverse-in of the hooked yarn is provided, and a tail bunch formed when the yarn is switched from a full bobbin to an empty bobbin is provided with a desired base point when the yarn is captured by the slit. It is characterized by comprising means for controlling the number of turns.

The yarn package manufacturing apparatus according to the present invention, as described in (2) above, detects a change in tension generated at the moment when the yarn is captured by the slit groove or the yarn capturing portion. Is preferably provided.

Further, as described in the item (3), the yarn package manufacturing apparatus of the present invention compares the tension waveform obtained by the yarn winding tension detecting unit with a predetermined threshold value. It is preferable to have.

Further, as described in the above (4), the yarn package manufacturing apparatus of the present invention sets the intersection where the steeply changed tension waveform intersects the threshold with the slit groove or the yarn catching portion. After the predetermined time for forming the tail bunch having the desired number of turns with the intersection as a base point at the moment of capture, the tail bunch winding number control means for releasing the traverse-in regulation of the yarn by the tail bunch forming means is provided. Is preferred.

Further, the method for manufacturing a yarn package according to the present invention includes the steps (1) to (4) described in (5).
A method for manufacturing a yarn package using the yarn package manufacturing apparatus according to any one of the above.

According to the present invention, a timer for forming a tail bunch based on a moment when a slit groove on a bobbin or a yarn catching portion catches a yarn is started and a desired number of turns is formed. This is preferable because it can be realized only by adding a simple circuit.

Also, according to the present invention, the traverse-in restriction guide performs ON / OFF operation at the time set by the timer,
By combining the conventional control means for forming the tail bunch, even if the timing at which the yarn according to the present invention is caught in the slit groove cannot be detected, the conventional control means can traverse in after a certain period of time. Since the regulation guide is turned off, it is preferable in that a thread switching failure in which a tail bunch is continuously formed at the end of the bobbin can be suppressed.

Hereinafter, the present invention will be described in more detail based on an embodiment shown in the drawings. FIG. 1 is a configuration diagram showing an example of a manufacturing apparatus for carrying out the yarn package manufacturing method of the present invention, and FIGS. 3 to 7 are schematic diagrams showing an example of a yarn switching operation.

In FIG. 1, a pair of bobbin holders 2 are rotatably mounted on a turret board 4 rotatably supported by a machine frame 1 by a rotating shaft 8 using a motor 7 as a drive source. 3 are tightened. The bobbin holder 2 has a winding position on the lower side and a standby position on the upper side.

Below the bobbin holder 2 at the lower winding position, there is provided a frame which rises and lowers in the vertical direction. The frame is provided with a contact pressure roller 6 and a traverse device 5 which are rotatably mounted. ing. A traverse fulcrum guide 39 serving as a feed fulcrum of the yarn and a tension meter 12 for detecting the tension of the wound yarn are provided therebelow, and a change in the tension during winding is constantly monitored. . In the present embodiment, the tension meter 12 is configured to have the effect of the traverse fulcrum guide 39, but it is needless to say that the tension meter 12 and the traverse fulcrum guide 39 may have different configurations.

As shown in FIG. 8, the tension meter 12 detects the force due to the thread tension applied to the active lever 43 via the traversing guide A41 by traversing the thread 46, but also detects the force due to mechanical vibration. Since they are detected together, the output includes a noise component.

For this reason, a dummy lever 42 provided with a traverse guide D40 that receives only mechanical vibration without contacting the yarn 46 is separately provided, and a strain gauge A45 attached to the active lever 43 and a dummy lever 42 attached to the dummy lever 42. By taking the differential of the output of the strain gauge D44,
The noise component due to the mechanical vibration is canceled, and only the force due to the yarn tension is detected.

As shown in FIG. 3, the traverse fulcrum guide 39
Is traversed left and right by a traverse guide (not shown), and is wound on the bobbin 3 at the winding position (see FIG. 2).
It will be rolled up as.

When the bobbin 3 at the winding position is full, the turret board 4 is rotated by 180 ° by a driving device (not shown), so that the full bobbin is moved to the upper standby position, and the upper bobbin is standby. The empty bobbin moved to the lower winding position. When the bobbin position is exchanged in this way,
The yarn being wound on the upper full bobbin contacts the side surface of the partition plate 16 in the middle while the traverse fulcrum guide 3
9 to form a thread path.

At a certain timing while the turret board 4 is rotating, the yarn pulling guide 18 which has been waiting below the traverse area by the traverse guide below the winding position moves laterally as shown in FIG. When the thread enters the traverse area, the thread fed with the traversing fulcrum guide 39 as a fulcrum is hooked and removed from the traverse area, and at the position where the horizontal movement of the thread pulling guide 18 is completed, the thread is threaded as shown in FIG. It is deposited in the route guide 20. During this time, the traverse-in restricting means 19 for restricting the yarn from traversing in when guided to the yarn hooking position is protruded by the air actuator.

When the yarn moving guide 18 starts to traverse to return to the standby position as shown in FIG.
The yarn held at 0 is guided to the end of the empty bobbin, that is, to the yarn hooking position on the vertical line of the slit groove 24. However, since the traverse-in restricting means 19 protrudes, the yarn is traversed at this timing. Never go in.

Next, as shown in FIG.
Starts operating, and the yarn on the vertical line of the slit groove 24 on the bobbin 3 comes into contact with the peripheral surface of the rotating bobbin 3 by the yarn hooking guide 21 and is pressed against the slit groove 24.
And the yarn switching is completed. The number of turns of the tail bunch formed by this is set on the assumption that the thread hooking timing by the thread hooking mechanism 10 and the time-up timing of the bunch timer match. Threading mechanism 1 from various factors such as
It is difficult to match the threading timing by 0 with the time-up timing of the bunch timer.

As described above, when the yarn hooking timing of the yarn hooking mechanism 10 does not coincide with the time-up timing of the bunch timer, and when the time-up timing of the bunch timer is earlier than the yarn hooking timing, the traverse-in restricting means 19 is operated earlier than a predetermined time. The number of turns of the tail bunch formed due to the retreat is reduced. On the other hand, in the opposite case, the number of turns of the tail bunch formed because the traverse-in regulating means 19 regulates the yarn at the threading position longer than a predetermined length is increased. For example, when the winding speed of the yarn winding machine is 5000 m / min and the bobbin diameter is φ = 90 mm, even if these timings fluctuate by only 50 msec, when the number of turns of the tail bunch is set to be about 15 laps, it is formed. Would be.

On the other hand, in the present embodiment, the yarn winding direction at the time of yarn switching by the automatic turret type yarn winding machine is generally opposite to the rotation direction of the empty bobbin.
Paying attention to the fact that the tension of the yarn is relaxed at the moment of catching in the yarn, the yarn is detected from the signal of the tension waveform obtained by the tension meter 12 which detects the winding tension of the yarn already mounted on the winding device. A moment when the tension is sharply relaxed by the slit being caught in the slit groove 24, that is, the timing at which the tail bunch starts to be wound on the bobbin 3 is detected by providing a simple tension detection circuit 13, and the tail bunch is adjusted to a desired number of windings based on the detected timing. To control. Hereinafter, a method of detecting a steep change in tension that occurs when the yarn is captured will be described with reference to FIGS. 9 and 10.

As shown in FIG. 9, the tension signal 28 output from the tension meter 12 mounted on the winding device is transmitted to the tension detection circuit 13, and the high-pass filter 35 filters low-frequency components. , Are output as a high-pass processing signal 29. Here, by performing high-pass processing on the tension signal 28, only a steep tension change that occurs when the yarn enters the slit groove provided on the bobbin or the yarn catching portion is detected, and other gentle tension changes are detected. Since it can be eliminated, it is possible to accurately detect the timing at which the yarn is captured.

Next, the filtered high-pass processed signal 2
9 is input to a comparator 36 and compared with a separately determined threshold 30 to detect an intersection 31 between the high-pass processing signal 29 and the threshold 30 shown in FIG.

Thereafter, the signal at which the intersection 31 is detected is shaped by a waveform shaper 38 and output as a yarn catching signal 32.

Next, when the yarn catching signal 32 is inputted to the traverse-in control circuit 38, the traverse-in control circuit 38 measures a time Td35 required for forming a desired tail bunch set by the tail bunch setting device 14.

After a lapse of time Td35, the traverse-in control circuit 38 turns off the traverse-in restriction signal 33, and the traverse-in restriction guide 19 retreats as shown in FIG. The traverse guide rotating in the traverse area catches the yarn and starts winding the yarn around the empty bobbin.

Accordingly, in this embodiment, the slit groove 24 on the empty bobbin side at the time of yarn switching catches the yarn, and the starting point of the winding of the yarn on the bobbin 3 can be recognized to set the number of turns of the tail bunch. Therefore, even in the case of a bobbin such as a recycled bobbin in which the yarn catching performance of the slit groove 24 is reduced, or in a case where the yarn hooking timing is delayed due to a drive loss of the yarn hooking mechanism 10 of the yarn winding machine, the tail bunch can be used. A tail bunch having a constant number of turns can be formed stably without variation in the number of turns.

When it is not possible to detect the moment when the yarn is caught in the slit groove or the yarn catching section by the tension signal 28, since the conventional control means is combined, the traverse-in after a certain period of time has elapsed. The regulation guide is retracted, and winding of the yarn around the empty bobbin is started. Thus, there is no occurrence of thread switching failure in which the tail bunch is continuously formed at the end of the bobbin because the traverse-in regulating guide does not retreat.

[0045]

According to the present invention, it is possible to obtain a desired value regardless of the superiority or inferiority of the yarn catching performance of the slit groove provided on the bobbin used for winding the yarn and the temporal change of the yarn hooking mechanism. A tail bunch with a fixed number of turns can be formed, so that the number of turns of the tail bunch is small, so that the yarn length required for yarn end treatment cannot be obtained, or the number of turns of the tail bunch is large, so that the tail bunch has a large number of turns. The tail bunch hangs down from the take-up bobbin, and the tail bunch formed at the end of the bobbin is not unwound due to being entangled with another yarn package, or is entangled with the transport trolley or the yarn end processing device, and the yarn end processing is not performed. It is possible to obtain an effect of preventing a problem that the operation cannot be performed smoothly.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an embodiment of a yarn winding machine of the present invention.

FIG. 2 is a schematic view showing one embodiment of a yarn package manufactured by a conventional manufacturing method.

FIG. 3 is a schematic diagram illustrating an example of a yarn switching operation in the yarn winding machine of the present invention.

FIG. 4 is a schematic view showing an example of a yarn switching operation in the yarn winding machine of the present invention.

FIG. 5 is a schematic diagram showing an example of a yarn switching operation in the yarn winding machine of the present invention.

FIG. 6 is a schematic view showing an example of a yarn switching operation in the yarn winding machine of the present invention.

FIG. 7 is a schematic diagram showing an example of a yarn switching operation in the yarn winding machine of the present invention.

FIG. 8 is a schematic view showing an embodiment of a tension meter mounted on the yarn winding machine of the present invention.

FIG. 9 is a block diagram showing an example of a control circuit for detecting a tension waveform signal in the yarn winding machine of the present invention, forming a tail bunch having a desired number of windings, and performing processing up to driving a traverse-in regulating guide. FIG.

FIG. 10 is an explanatory diagram showing a result obtained by passing a tension waveform output from a tension meter through a high-pass filter and comparing with a threshold to detect a moment when a yarn is caught in a slit groove.

[Explanation of symbols]

 1: machine frame 2: bobbin holder 3: bobbin 4: turret board 5: traverse device 6: contact pressure roller 7: electric motor 8: rotating shaft 9: thread switching mechanism 10: thread hooking mechanism 11: tail bunch forming mechanism 12: tension meter 13 : Tension detection circuit 14: Tail bunch setting device 15: Winding layer 16: Partition plate 17: Traverse guide plate 18: Thread guide 19: Traverse in guide 20: Thread guide 22: Thread guide 22: Thread guide 22 23: Arm 24: Slit groove 25: Tail bunch 26: Transfer tail 27: Surface bunch 28: Tension signal 29: High pass processing signal 30: Threshold 31: Intersection 32: Yarn catching signal 33: Traverse-in regulation signal 34: Td: Tail bunch Forming timer 35: High-pass filter 36: Comparator 37: Waveform shaper 38: traverse-in control circuit 39: traverse fulcrum guide 40: traverse guide D 41: traverse guide A 42: dummy lever 43: active lever 44: strain gauge D 45: strain gauge A 46: thread

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mamoru Kosuge 1st exit of Yahagi-cho, Okazaki City, Aichi Prefecture Toray Co., Ltd. Inside the Okazaki Plant (72) Inventor Junya Fujino 1st exit of Yahagi-cho, Okazaki City, Aichi Prefecture Toray Corp. F-term in Okazaki factory of formula company (reference) 3F056 EA01 EB01

Claims (5)

[Claims] The yarn is caught by a slit groove provided on a bobbin or a yarn catching portion formed by a joining portion where end faces of the bobbin and a yarn switching bobbin come into contact with each other, and the yarn is continuously wound. A yarn package manufacturing apparatus for hanging a yarn on a bobbin, a tail bunch forming means for regulating traverse-in of the yarn hung on the bobbin, and a full bobbin winding the yarn. A thread bunch formed at the time of switching from the bobbin to the empty bobbin, the thread bunch is provided with a means for controlling the number of windings to a desired number based on the time when the yarn is caught by the slit groove or the yarn catching portion. manufacturing device. 2. The yarn according to claim 1, further comprising a yarn winding tension detecting means for detecting a tension change occurring at a moment when the yarn is captured by the slit groove or the yarn capturing portion. Article package manufacturing equipment. 3. The yarn package manufacturing apparatus according to claim 2, further comprising means for comparing a tension waveform obtained by said yarn winding tension detecting means with a predetermined threshold value. 4. An intersection at which the steeply changed tension waveform and the threshold cross each other is defined as the moment when the yarn is caught by the slit groove or the yarn catching portion, and the intersection is used as a base point to form a tail bunch having a desired number of windings. After a predetermined time,
4. The yarn package manufacturing apparatus according to claim 3, further comprising a tail bunch winding number control means for releasing the traverse-in restriction of the yarn by the tail bunch forming means. 5. A method for manufacturing a yarn package, comprising using the apparatus for manufacturing a yarn package according to claim 1.