JPH0441725A - Method for spinning and winding yarn in spinning frame - Google Patents

Abstract

PURPOSE:To prevent end face drop (caused by yarn slackness between a package and a cutter), etc., at the package end face by providing a time lag between a yarn breakage signal due to a yarn defect signal with a slub catcher installed between a spinning part and a winding part and a package rotation stop signal. CONSTITUTION:A time lag is provided between a yarn breakage signal for a cutter 14 on a yarn defect signal with a slub catcher 3 located between a spinning part 2 and a winding part 4 and a package rotation stop signal for a friction roller driving motor 21, and the broken end on the side of the package is wholly wound onto a package 19.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a method for spinning and winding yarn in a spinning machine.

[Conventional technique 1m In spinning 1111, the slab catcher detects defects in the yarn, transmits a signal from the slab catcher to the cutter to cut the yarn, and at the same time transmits a package rotation stop signal to the winding device to remove the package. As soon as it leaves the friction roller, its rotation is stopped by the brake, and the yarn splicing is performed by the yarn m device, but during this time the yarn
Since the chain yarn is continuously spun from the beginning, the yarn becomes slack, so the slack portion of the chain yarn is suctioned and held in a suction vibrator called a slack tube. However, when the slab catcher detects a defect in the yarn and the cutter cuts the yarn, the yarn between the cutter and the package may become slack, causing so-called end-face drop at the end of the package. When the slab catcher detects a defect in the yarn again, the rotation of the package is stopped again while the yarn is still being sucked into the slack tube, and as a result, the system stops running. Phenomena such as thread remaining and changing the zero point of the slab catch V were observed. [Problem to be solved by 'R Ming 1] The present invention solves the problem that when the slab catcher detects a defect in the yarn and the cutter cuts the yarn, so-called end-face drop occurs in the yarn between the cutter and the badge, or the yarn When the slab catcher detects a defect in the yarn again immediately after splicing is completed, the rotation of the package is stopped while the yarn remains in the slab catcher, and the yarn is spun so that the zero point of the slab catcher does not change. The purpose is to learn how to [Means for Solving the Problems] A spinning machine including a spinning section that spins a spun yarn, and a winding section that winds up the spun yarn from the spinning section to form a package. A slab catcher installed between the winding unit detects a defective part of the yarn and issues a yarn cut signal to the cutter, and then sends a package rotation stop signal with a time difference from the yarn cut signal to the winder. emit to the device.

[For production]

Even after the yarn defect detection signal from the slab catcher is transmitted to the cutter and the yarn is cut, the package continues to rotate and stops rotating after winding all the yarn ends on the package side into the package. This prevents the rotation of the bagge from stopping with the thread remaining in the bag.

【Example】

An example in which the method of the present invention is applied to a pneumatic spinning equipment will be described below. Reference numeral 1 denotes a fixed U-shaped cross-sectional frame, with an air spinning unit (hereinafter referred to as spinning section) 2 on the top, a slab catch v3 on the front, a winding section 4, and a yarn between the slab catcher 3 and the winding section 4. A tensor device 15 for bending the path is provided, and a trolley 8 on which an automatic yarn splicing device 7 is mounted is installed inside by a guide rail 6 so as to be movable in the longitudinal direction of the frame (in the direction perpendicular to the plane of the paper in FIG. 1). The spinning section includes back rollers 9. Middle roller 10. It consists of a draft part 12 consisting of a front roller 11, an air spinning nozzle 13, a cutter 14, a delivery roller 15, and a suction pipe 16 for fluff or the like. The winding unit 4 uses a cradle 18 rotatably supported on a shaft 17 to move the package 19 onto a friction roller 20.
The friction roller 20 is supported by a bearing so as to be rotatable independently for each weight, and is connected to a variable speed drive motor 21. The automatic yarn splicer HIf7 includes a suction vibrator 22 for suctioning the yarn end on the sending side and a suction mouse 2 for suctioning the yarn end on the winding side.
3. Suction vibe 22. It is composed of a blower 24 that generates a suction air flow to a suction mouth 23, and a thread splicing member 25 such as a splicer that uses a knock or air jet. Reference numeral 26 denotes a suction vibrator, generally called a slack tube, which suctions and pulls the yarn to the right in FIG. As shown in FIG. 2, the tip is opened between the delivery roller 14 and the slab catch v3, and the base thereof is connected to a suction HIF (not shown) via the suction main pipe 27, so that the inside of the slab catch v3 is generates suction force. Therefore, the yarn Y spun from the sliver S via the spinning section 2
is wound up into a package 19 supported by a cradle 18 via a slab catch t3 and a tensor device 5,
In the method of the present invention, when the slab catcher 3 detects a yarn defect and issues a yarn cutting signal to the cutter 14, the signal from the slab catcher 3 to stop the rotation of the package 19 is not transmitted to the winding section 4 at the same time. After the thread cutting signal is issued to the cutter 14, a rotation stop signal for the package 19 is transmitted to the winding section 4 at a slight interval. That is, now, when the slab catcher 3 detects a yarn defective part,
As shown in Fig. 3, the thread running signal FW is cut off, and the relay RA
1 opens. When relay RA1 opens, switch RA1. is opened, the solenoid SO□ of the driving charge of the spinning section 2 is deenergized and spinning of yarn is stopped, and at the same time the switch RA is opened.
i-2 is closed, the coil of the delay timer TR is energized, and after a predetermined time has elapsed, the contacts of the switch TR3 are closed, and the solenoid S03 holding the cradle 18 of the winding section 4 is deenergized. The cradle 18 swings and separates the package 19 from the friction roller 20, so that the package 19 stops rotating. As a result, the yarn defect detection signal from the slab catch v3 is transmitted to the cutter 14, and even after the yarn is cut, the package 19 continues to rotate, winds up all the cut yarn ends on the package side into the package 19, and then wraps the yarn again. Suppose that immediately after the splicing is completed and the operation is restarted, while the slack yarn Y' is still present in the slack tube 26, the slab catch 173 detects a yarn defect again and the cutter 14 operates to cut the yarn. However, since the pan cage 19 continues to rotate, all of the cut yarn ends on the package 19 side, including the slack yarn Y' portion that was suctioned and held in the slack tube 26, are wound up into the package 19. The rotation of the package 19 does not stop with the yarn remaining in the slab catcher 3. And slab catch 1-
The defective part of the yarn detected by the yarn Y is cut by the cutter 14 and is temporarily wound into the package 19, but the cart 8 that has cut the automatic yarn splicing device 7 stops in front of the spinning unit and splices the yarn. When the knock 2
It is cut during thread splicing in step 5 and removed by suction into a suction mouth. It should be noted that the object of the present invention can be sufficiently achieved by issuing a signal to stop the rotation of the package 19 to the winding section 4 approximately 1 to 3 seconds after the slab catcher 3 issues a thread cutting signal to the cutter. It was done.

【Effect of the invention】

As described above in detail, the present invention provides a spinning machine including a spinning section that spins a spun yarn, and a winding section that winds up the spun yarn from the spinning section to form a package. A slab catcher installed between the winder and the winding unit detects a defective part of the yarn and issues a yarn cutting signal to the cutter, and then sends a package rotation stop signal with a time difference from the system cutting signal. Since the yarn defect detection signal from the slab catcher is transmitted to the cutter, the package continues to rotate even after the yarn is cut, and all cut yarn ends on the package side are wound up into the package. This eliminates the possibility of so-called end-face falling at the end face of the package due to slack in the yarn, and even when there is still loose yarn in the slab cutter 1-b immediately after yarn splicing is completed and operation is restarted. Even if the slab catch detects a yarn defect again and the cutter operates to cut the yarn, the package continues to rotate, so all cut yarn ends on the package side, including the loose yarn, are wound into the package. The rotation of the package will not stop with yarn remaining in the slab catcher and the zero point of the slab catch r will not change. The yarn is suction-grabbed by the machine, unwound from the package, cut when spliced by knocking, and removed by suction into the suction mouth, so defective yarns are not left in the pan cage, greatly contributing to improved product quality. .

[Brief explanation of drawings]

FIG. 1 is a sectional side view of an air spinning machine for carrying out the method of the present invention, and FIG. 2 is a spinning section of the same machine. A schematic side view between the winding sections and FIG. 3 is a signal circuit diagram. 2...Spinning department, 3...Slab catcher. 4... Winding section, 7... Automatic yarn splicing device. 8...Dolly, 19...Package. 20... Noriction roller. 26...Slack tube. Y... Thread, Y'... Loose thread S... Sliver. Patent applicant Mura EBm Machine Co., Ltd. Agent Patent attorney Katsu Ohno Agent Patent attorney Rei Ohno

Claims (1)

[Claims] 1. In a spinning machine equipped with a spinning section that spins spun yarn, and a winding section that winds up the spun yarn from this spinning section to form a package, there is a space between the spinning section and the winding section. The provided slab catcher detects a defective part of the yarn, issues a yarn cutting signal to the cutter, and then issues a package rotation stop signal to the winding device with a time difference from the yarn cutting signal. A method for spinning and winding yarn in a spinning machine.