JPH0598523A - Method for cutting high-tenacity yarn in apparatus for spinning - Google Patents

Abstract

PURPOSE:To prevent a top roller of a delivery roller from being damaged by stopping the feed of a sliver and stretch-breaking yarn when a yarn defect is sensed with a slub catcher. CONSTITUTION:When a defect of spun yarn (Y) is sensed with a stub catcher 9, the rotation of a back roller 1 and the third roller 2 is stopped. A sliver (S) is stretch-broken between the third roller and a middle roller 3 rotating at a higher speed than that of the third roller at the same time as the stop of the feed of the sliver. Thereby, a top roller of a delivery roller 8 can be prevented from being streakily damaged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of cutting high strength yarn in a spinning device.

[0002]

2. Description of the Related Art An example of a conventional spinning device is shown in FIG.
The spinning device is provided with a four-wire draft device 5 including a back roller 1, a third roller 2, a middle roller 3 on which an apron band is mounted, and a front roller 4, and an air spinning nozzle 6 and a downstream side of the front roller 4 are provided. A yarn guide 7 and a delivery roller 8 are arranged, and a slab catcher 9 and a winding device 10 for detecting a defect of the yarn sent out from the delivery roller 8 are arranged on the downstream side thereof, and the yarn outlet of the air spinning nozzle 6 is provided. Is provided with a dust collector 11 having a nip type yarn cutter (not shown) inside.

Now, the sliver S drawn from a can (not shown) is supplied to the back roller 1 through the trumpet guide 12, and the third roller 2, the middle roller 3, and the like.
After being drafted through the front roller 4, it is twisted by an air spinning nozzle 6 to form a yarn Y, which is taken up by a winding device 10 through a dust collector 11, a yarn guide 7, a delivery roller 8 and a slab catcher 9. , The package 13 is formed.

At this time, when defects such as yarn unevenness are recognized in the yarn Y spun by the slab catcher 9, a detection signal is transmitted to the controller 14, and the controller 14 immediately causes the nip type yarn cutter in the dust collector 11 to operate. A signal is transmitted to cut the yarn Y and the operation of the draft device 5 is stopped.

However, when the yarn to be spun out is a thick yarn or a yarn having strong fiber strength such as Kepler, the yarn is not cut well by the nip type yarn cutter, the yarn is nipped at the yarn cutter portion, and is delivered by the delivery roller 8. Due to being pulled, a problem that the rubber-made top roller (nip roller) 8a of the delivery roller 8 is scratched in a streak shape was recognized.

[0006]

DISCLOSURE OF THE INVENTION The present invention provides a method for cutting high-strength yarn, which does not scratch the top roller of the delivery roller when cutting yarn of strong yarn strength such as thick count yarn and Kepler. The purpose is to get.

[0007]

When a yarn defect is detected by a slab catcher, the draft roller on the upstream side of the draft device is immediately stopped to stop the sliver supply,
The yarn is draft-cut with a roller adjacent to the downstream side.

[0008]

[Function] The top roller of the delivery roller is completely prevented from being scratched.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

The basic structure of the spinning device for carrying out the method of the present invention is no different from the conventional spinning device. Therefore, the same parts as those of the spinning device for carrying out the present invention shown in FIG. 1 and the conventional spinning device shown in FIG. 2 are designated by the same reference numerals.

That is, the spinning device for carrying out the method of the present invention is
A four-wire draft device 5 including a back roller 1, a third roller 2, a middle roller 3 mounted with an apron band, and a front roller 4 is provided, and an air spinning nozzle 6, a yarn guide 7, and a delivery roller are provided downstream of the front roller 4. 8
And a slab catcher 9 and a winding device 10 for detecting a defect of the yarn sent from the delivery roller 8 are arranged on the downstream side, and a dust collector 11 is provided at the yarn outlet of the air spinning nozzle 6. Has been. The back roller 1 and the third roller 2 are the back bottom roller 1
a and the third bottom roller 2a and a gear 16 with a clutch attached to the drive shaft 15 rotate through a timing belt 17, but the rotation speed of the third roller 2 is the rotation speed of the back roller 1. It goes without saying that the sliver S is drafted at a higher speed.

Therefore, the sliver S pulled out from the can (not shown) is supplied to the back roller 1 via the trumpet guide 12, drafted via the third roller 2, the middle roller 3 and the front roller 4, and then air. The yarn Y is formed by being twisted by the spinning nozzle 6, and wound on the winding device 10 via the dust collector 11, the yarn guide 7, the delivery roller 8 and the slab catcher 9 to be packaged.
Form 13.

However, in the present invention, when a defect such as a yarn unevenness is recognized in the yarn Y spun by the slab catcher 9, a detection signal is transmitted to the controller 14, and the controller 14 immediately causes the clutch on the drive shaft 12 to rotate. A signal is transmitted to the attached gear 16, the clutch is disengaged, the rotation of the back roller 1 and the third roller 2 is stopped, and the supply of the sliver S is stopped. As a result, the sliver S in which the fibers are still aligned is Since the draft cutting is performed between the middle roller 3 and the middle roller 3 rotating at a higher speed than that, it is possible to prevent the top roller (nip roller) 8a of the delivery roller 8 from being damaged.

In the above embodiment, the spinning device equipped with the four-wire draft device 5 has been described as an example, but the present invention is not limited to this, and it is needless to say that it is a three-wire type or a five-wire type. Needless to say, the present invention can be easily carried out for a spinning device equipped with a draft device, and in carrying out the method of the present invention, a nip type cutter is provided in the dust collector 11 provided at the yarn outlet of the air spinning nozzle 6. You don't have to
When the spinning device is used not only for spinning high-strength yarn, which is the object of the present invention, but also for spinning ordinary spun yarn, the nip-type cutter may be arranged without any problem.

Further, in the above embodiment, when the slab catcher 9 detects the defect of the yarn, the back roller 1 and the third roller 2 are stopped, and the sliver S is drawn between the third roller 2 and the middle roller 3. Although it has been described as extending and cutting, the timing belt 17 is mounted between the clutch-equipped gear 16 attached to the drive shaft 15 and the back roller 1, so that only the back roller 1 can be stopped, and the back roller 1 and the third roller can be stopped. Needless to say, the sliver S may be draft-cut with the roller 2.

[0016]

As described above in detail, in the method for cutting high strength yarn in the spinning device of the present invention, when the yarn defect is detected by the slab catcher, the draft roller on the upstream side of the draft device is immediately stopped. Since the supply of the sliver is stopped and the yarn is draft-cut with the roller adjacent to the downstream side of the sliver, the yarn is not cut by the nip type yarn cutter as in the past, and the yarn is nipped at the yarn cutter part. Since it is pulled by the delivery roller, it is possible to completely prevent the phenomenon that the rubber-made top roller (nip roller) of the delivery roller is streaked.

[Brief description of drawings]

FIG. 1 is a perspective view of a spinning device for carrying out the method of the present invention.

FIG. 2 is a perspective view of a spinning device that carries out a conventional yarn cutting method.

[Explanation of symbols]

 1a Back bottom roller 2a Third bottom roller 8 Delivery roller 8a Top roller (nip roller) 9 Slab catcher 11 Dust collector 14 Controller 15 Drive shaft 16 Gear with clutch 17 Timing belt

Claims (1)

[Claims] 1. When a slab catcher detects a yarn defect, the draft roller on the upstream side of the draft device is immediately stopped to stop the supply of the sliver, and the yarn is fed between the sliver and an adjacent roller. A method for cutting high-strength yarn in a spinning device that performs draft cutting.