JP2778288B2 - Threading method of elastic yarn in core yarn spinning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of threading an elastic yarn in a core yarn spinning device.

[0002]

2. Description of the Related Art The present applicant has previously developed an air spinning apparatus for producing a bound yarn by providing a spinning nozzle for twisting a drafted fiber bundle by a swirling airflow of compressed air downstream of a drafting device for each weight. Subsequently, a core yarn spinning device for manufacturing a core yarn using an elastic yarn as a core yarn was developed by improving the air spinning device.

[0003] This core yarn spinning device is provided with a supply device of an elastic yarn on each weight, and supplies the elastic yarn together with the fiber bundle drafted by the draft device from the front roller of the draft device to the spinning nozzle and twists the yarn. A core yarn is obtained in which the elastic yarn is used as the core yarn, the outside of which is wrapped with the fibers of the fiber bundle, and a part of the fiber is wound around the surface.

[0004]

In the above-described core yarn spinning device, when the thread end of the elastic yarn is inserted from the front roller of the draft device to the spinning nozzle, the elastic yarn has elasticity. It is difficult to introduce the yarn end of the elastic yarn directly from the roller, which has been a very difficult operation.

Accordingly, an object of the present invention is to provide a method of threading an elastic yarn in a core yarn spinning apparatus that can easily thread an elastic yarn.

[0006]

In order to achieve the above object, the present invention provides a core yarn having an elastic yarn as a core yarn by supplying an elastic yarn together with a drafted fiber bundle from a front roller of a draft device to a spinning nozzle. In the method of threading an elastic yarn in a spinning device to be manufactured, the yarn end on the spinning side is
After the yarn end of the elastic yarn is inserted into the spinning nozzle while the inside of the spinning nozzle is sucked by the suction nozzle leading to the yarn joining portion from the exit of the skewer, the middle of the elastic yarn is hung on the front roller. It is characterized by.

[0007]

[ Function ] When threading an elastic thread,
While the inside of the spinning nozzle is being sucked by the spinning nozzle, the yarn end of the elastic yarn is inserted into the spinning nozzle. Thus without it pulled out from the spinning nozzle elastic yarn due to its own elasticity, Sa
With the large suction force of the suction nozzle, the thread passes through the spinning nozzle.
It suggested that, then by multiplying the middle of the elastic yarn to the front rollers of the drafting device, resulting in yarn end of the elastic yarn is made from the front roller to the threading state in the spinning nozzle. this
At this time, tension is applied in the middle of the elastic yarn,
The tension ensures that the elastic yarn is centered on the front roller.
Elastic yarn, which can be positioned and thereby the core yarn
Is positioned exactly in the center of the core yarn and the surrounding fibers
It can be prevented from protruding.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

1 to 3, reference numeral 1 denotes a weight (spinning unit) of a plurality of spinning devices arranged in parallel, and a sliver 4 supplied via a guide 3 from a rear can 2 to the upper portion of each weight 1. A draft device 6 for aligning with a predetermined fiber bundle 5 is provided.

The draft device 6 is mainly composed of a back roller 7, an apron 8 and a front roller 9 which are paired up and down.
The apron and the front roller) are cantilevered.

Downstream of the draft device 6, there is provided a spinning nozzle 13 for twisting the fiber bundle by a swirling airflow of compressed air. An elastic yarn 11 to be described later is supplied from the front roller 9 of the draft device 6 to the spinning nozzle 13 together with the drafted fiber bundle 5 and twisted to form the core yarn 1.
2 is manufactured.

A delivery roller 14 for the manufactured core yarn 12 is provided downstream of the spinning nozzle 13, and a winding section 16 for winding the core yarn 12 fed from the delivery roller 14 into a package 15 is provided below the front surface of the weight 1. Have been. A slab catcher 17 is provided between the delivery roller 14 and the winding section 16 to detect a yarn defect such as a yarn unevenness of the core yarn 12 fed, and a signal from the slab catcher 17 causes the back of the draft device 6 to return. The driving of the roller 7 is stopped, and the cutter 25 disposed between the spinning nozzle 13 and the delivery roller 14 operates to cut the core yarn 12. Accordingly, when a yarn break occurs, the fiber bundles 5 downstream of the back roller 7 are torn off from the back roller 7 because the components other than the back roller 7 are driven, and the suction provided in the vicinity of the cutter 25 is cut off. The suction is removed from the mouth 26.

On the other hand, above the draft device 6, the elastic yarn 1
One supply device 10 is provided, and the elastic yarn 11 supplied from the supply device 10 is introduced into the spinning nozzle 13 together with the fiber bundle 5 from the front roller 9. The supply device 10 is provided with a common drive shaft 19 which is wound around the juxtaposed weights 1 and is driven to rotate by one motor 18. The drive shaft 19 drives a package 20 of the elastic yarn 11. Rotary roller 2
1 is attached to each weight.

The package 20 of the elastic yarn 11 has a horizontal shaft 2.
2 is rotatably supported by a cradle arm 23 which is attached to the upper roller 2 so as to be able to freely ascend.
Touches the top and receives rotation. A stopper 24 for stopping the rotation of the package 20 when the core yarn 12 breaks is provided between the rotating roller 21 and the package 20 so as to be freely inserted and removed.

The stopper 24 is rotatably supported by a support shaft 27, and the tip of the stopper 24 is inserted and removed between the rotating roller 21 and the package 20 by the rotation. The stopper 24 preferably has a shape inserted between the rotating roller 21 and the package 20 without contact with the rotating roller 21.

A spring 28 for urging the stopper 24 in the insertion direction is connected to the stopper 24. The stopper 24 is normally held against the spring 28 in a state where the stopper 24 is removed from between the rotary roller 21 and the package 20. A solenoid 29 that is turned off by a signal from the slab catcher 17 and inserts the stopper 24 between the rotating roller 21 and the package 20 is connected.

When the solenoid 29 is turned off and the stopper 24 is inserted between the rotating roller 21 and the package 20, the electromagnet 29 constituting the solenoid 29 is turned off.
Since the a and the suction plate 29b are greatly separated from each other, even if the solenoid 29 is turned on, the stopper 24 cannot be removed from between the rotary roller 21 and the package 20 by the electromagnetic force.
The stopper 24 is provided with the rotating roller 21 and the package 2.
A manual operation lever 30 for pulling out from between 0 and 0 is attached.

Reference numeral 31 denotes a yarn guide for guiding the elastic yarn 11 unwound from the package 20 to the front roller 9, and the presence or absence of the elastic yarn 11 fed to the yarn path downstream of the yarn guide 31. And a clamper 33 that grips the elastic yarn 11 when the core yarn 12 breaks. Sensor 3
Reference numeral 2 denotes an optical sensor or the like. The driving of the back roller 7 of the draft device 6 is stopped in the same manner as the signal from the slab catcher 17 by the signal of no elastic yarn from the sensor 32, and the spinning nozzle 13 and the delivery roller 14 The core 25 is cut by operating the cutter 25 disposed therebetween.

The clamper 33 includes a fixed piece 33a and a shaft 34.
The movable piece 33b is rotatably supported by the movable piece 33b. One end of the movable piece 33b is connected to the stopper 24 via a link 35, and is movable with the fixed piece 33a in conjunction with the operation of the stopper 24 in the insertion direction. The elastic yarn 11 is gripped between the piece 33b.

The frame 1a of the weight 1 of the spinning device is formed to have a C-shaped cross section with an open front surface, and a yarn joining carriage 39 is provided so as to run along rails 37 and 38 in an internal space continuous in the longitudinal direction. ing. The yarn splicing cart 39 is rotated from the standby position A to the exit position of the spinning nozzle 13 indicated by a two-dot chain line in FIG. A suction nozzle 41 for guiding the end to the yarn joining portion 40;
, And sucks the yarn end on the take-up side.
The suction mouths 42 which guide the yarn ends to the yarn joining portion 40 by returning to the yarn splicing portion 40 are provided so as to be pivotable.

A cam 4 for driving the suction nozzle 41 and the suction mouth 42 is provided on the yarn joining carriage 39.
3. A cam motor M for driving the cam 43, a blower for generating suction, and the like are provided. Yotei trolley 39
Is provided with a nozzle detection sensor 44 for detecting when the suction nozzle 41 moves from the origin position A to the exit position of the spinning nozzle 13, and one cycle for detecting one rotation of the cam 43. An end detection sensor 45 is provided. Further, the yarn joining cart 39 is provided with a fixed position detection sensor 46 for detecting that it has stopped at the fixed position of the weight 1 and a push button type operation switch PB for starting the yarn joining operation (not shown). ). While the cam 43 makes one rotation, the operation of the suction mouth 42 is completed first, and then the operation of the suction nozzle 41 is completed.

Next, the operation of the core yarn spinning device and the method of threading the elastic yarn will be described. The package 20 is driven in the direction of unwinding the elastic yarn 11 by the rotating roller 21, and the unwound elastic yarn 11 is given a predetermined tension by the speed difference between the front roller 9 and the rotating roller 21, and the fiber bundle after drafting is 5 is introduced from the front roller 9 to the spinning nozzle 13 and twisted. The core yarn 12 thus manufactured is fed to a winding unit 16 via a delivery roller 14 and wound on a package 15.

In this operating state, the slab catcher 17
Detects the yarn defect of the core yarn 12, the cutter 25 is operated by this signal to cut the core yarn 12, and the back roller 7 of the draft device 6 is stopped,
The stopper 24 of the elastic yarn supply device 10 is rotated by the force of the spring 28 when the solenoid 29 is turned off.
And the package 20. Further, the movable piece 33b of the clamper 33 closes with respect to the fixed piece 33a in conjunction with the operation of the stopper 24, and grips the elastic thread 11.

On the other hand, when the back roller 7 stops, the fiber bundle 5 downstream of the back roller 7 is torn off from the back roller 7,
The elastic yarn 11 downstream from the clamper 33 is torn off from the clamper 33 by the gripping of the clamper 33, and both of the elastic yarns 11 are sucked and removed from the suction port 26.

In this way, the weight 1 becomes a weight that needs to be spliced, and the yarn splicing truck 39 moves to the weight 1 that needs to be spliced by a yarn splicing request signal (a signal from the slab catcher 17) issued from the weight 1. And automatic operation is interrupted.

FIG. 4 shows a sequence circuit for carrying out this operation.
, The relay coil R1 is excited, the relay contact R1 is closed, and the
The self-holding is performed until the yarn joining operation of the cycle is completed (the relay contact R5 is opened). Further, the yarn joining cart 39 stops at a fixed position with respect to the weight 1 requiring the yarn joining, and the fixed position detection sensor 46 detects this and emits a signal, so that the relay coil R2 is excited and the relay contact R2 is closed and is held by itself until one cycle of the yarn joining operation is completed.

Even when the yarn joining vehicle 39 stops at the weight 1 that requires yarn joining, the yarn joining operation is not started because the relay contact R3 for exciting the relay coil MC of the cam motor M is open. Therefore, when the operation switch PB is turned on, the relay coil R3 is excited, the relay contact R3 is closed, and the suction nozzle 41 moves to the outlet of the spinning nozzle 13 (the relay contact R4 is opened), or
Since the self-holding is performed until the yarn joining operation of the cycle is completed, the relay coil MC of the cam motor M is excited during that time, the relay contact MC is closed, and the cam motor M rotates. First, the suction mouse 4 is rotated by the rotation of the cam motor M.
2 moves from the origin position B to the vicinity of the package 15, and after sucking the yarn end on the winding side, returns to the origin position B. Then, the suction nozzle 41 moves from the origin position A to the exit position C of the spinning nozzle 13. When this is detected by the nozzle detection sensor 44, the relay coil R4 is excited and its relay contact (b contact) R4 is opened, so that self-holding is released and the relay coil R3 is de-energized, and the relay of the cam motor M is turned off. The coil MC is also de-energized, and the cam motor M stops. As a result, the suction nozzle 41 stops at the outlet position C of the spinning nozzle 13 and enters a state in which the inside of the spinning nozzle 13 is sucked.

After the operator restarts the operation of the weight 1 (rotates the back roller 7), the fiber bundle 5 and the elastic yarn 1
The threading to the spinning nozzle 13 is performed. In particular, the elastic yarn 1
In the case of performing the first threading, the thread end of the elastic thread 11 is pulled out from the clamper 33 and inserted into the spinning nozzle 13 as shown in FIG. Since the inside of the spinning nozzle 13 is sucked by the suction nozzle 41, the yarn end of the elastic yarn 11 is not pulled out from the spinning nozzle 13 by its own elasticity.

Next, the stopper 2 is operated by the operation lever 30.
When the elastic yarn 11 is automatically supplied by pulling the elastic yarn 4 from between the rotating roller 21 and the package 20, the elastic yarn 11 passes through the spinning nozzle 13 and is sucked by the suction force of the suction nozzle 41 . Next, as shown in FIG.
1, that is, the portion from the clamper 33 to the spinning nozzle 13 is manually put on the front roller 9 of the draft device 6 (the elastic yarn is nipped by the front roller pair), whereby the elastic yarn 11 is From 9, the thread is passed through the spinning nozzle 13. Since the upper front roller 9 is cantilevered, the middle of the elastic yarn 11 can be easily hung on the front roller 9 of the draft device 6 and the middle of the elastic yarn 11 is
Because the tension is applied at 1, the elastic thread 11
At the center of the front roller 9.

The threaded elastic yarn 11 is twisted together with the threaded fiber bundle 5 by the spinning nozzle 13 and spun out as a core yarn 12, and when sufficiently sucked into the suction nozzle 41, the operation switch PB is turned on again. When the suction nozzle 41 is turned on until it passes through the nozzle detection sensor 44, the relay coil R3 is excited and the relay contact R
3 and R4 are closed and held by themselves, so that the cam motor M continues to rotate, and the yarn joining operation is performed. When the cam 43 makes one rotation and the one-cycle end detection sensor 45 issues a detection signal, the relay coil R5 is excited and its relay contact (b-contact) R5 is opened, so that the cam motor M stops and one cycle. Upon receiving the detection signal of the end detection sensor 45, the control device (not shown) restarts the automatic operation. As a result, the yarn joining section 40 automatically performs the yarn joining. Then, when the piecing is completed, the piecing carriage 39 automatically moves to the next piecing request weight.

[0031]

In summary, according to the present invention, the suction
Large suction force in the spinning nozzle due to the suction force of the
To ensure that the elastic yarn is inserted into the spinning nozzle.
Elastic thread when it is hung on the front roller
Position in the center of the front roller.
To prevent the elastic yarn from protruding from the surrounding fibers,
High quality core yarn can be manufactured.

[Brief description of the drawings]

FIG. 1 is a front view showing a core yarn spinning device for carrying out the method of the present invention.

FIG. 2 is an enlarged sectional view of FIG.

FIG. 3 is a partial cross-sectional view showing a state in which a suction nozzle of the yarn joining vehicle sucks a yarn end on a spinning side.

FIG. 4 is a diagram showing a sequence circuit for performing a yarn splicing operation.

FIG. 5 is a perspective view for explaining a threading method of an elastic thread.

[Explanation of symbols]

 5 Fiber Bundle 6 Draft Device 9 Front Roller 11 Elastic Yarn 12 Core Yarn 13 Spinning Nozzle

Claims (1)

(57) [Claims] 1. A drafted threading method of the elastic yarn in the spinning device from the front roller is supplied to the spinning nozzle to produce a core yarn for the elastic yarn as a core yarn draft apparatus elastic yarn together with the fiber bundle, spun Spinning side yarn end
After inserting the yarn end of the elastic yarn into the spinning nozzle while sucking the inside of the spinning nozzle by the suction nozzle leading from the nozzle outlet to the yarn joining portion, it is possible to hang the middle of the elastic yarn on the front roller. A method of threading an elastic yarn in a core yarn spinning device.