JPH07138824A - Method for ending yarn and yarn ending device therefor - Google Patents

Abstract

PURPOSE:To provide a method for ending yarn and a yarn ending device capable of clearly distinguishing a pieced up section formed by an ending part after knitting. CONSTITUTION:In ending by making one tail 34 longer among both ends occurring in yarn ending, this method for ending yarn is carried out while sucking at least the longer tail 34 in a suction nozzle 72 in a period from before to after operation of a yarn piecing nozzle 60. Therefore, the ending device is equipped with a pair of cutters 63 and 70 for cutting tails of two yarns at both sides of the yarn piecing nozzle 60 into which the two yarns are arranged and conducted and distance L2 of one cutter 70 to the piecing nozzle 60 is longer than distance L1 of the other cutter 63 to the piecing nozzle 60. The device is equipped with a nozzle 72 for sucking the yarn end cut by the other cutter 70 and the longer tail is kept in a state stretched by the piecing nozzle during operation to surely form the independent tail without being entangled in twisting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn splicing method and a yarn splicing device for yarns sampled from a synthetic fiber package processed by a draw false twisting machine or the like, which can clearly discriminate the yarn splicing portion. .

[0002]

2. Description of the Related Art For example, a drawing false twisting machine receives a yarn supply package from a spinning factory, performs a drawing false twisting process, and winds it into a synthetic fiber package. The doffing of this synthetic fiber package is automatically performed by an auto doffer. This auto doffer cuts the yarn being wound, sucks the yarn end, transfers the synthetic fiber package to the package carrier equipped around the draw false twisting machine, and installs the empty paper tube instead. , Thread hooking and bunch winding. The synthetic fiber package transferred to the package carrier is automatically conveyed to the drive end of the draw false twisting machine, and transferred to a pin track or the like prepared in advance by the transfer device.

The synthetic fiber package thus transferred to the pin track is transported to a predetermined place, and then shipped through an inspection process and a packing process.

By the way, the processing degree of the synthetic fiber package after the drawing false twisting machine is not always uniform, and a synthetic fiber package in which untwisted portions and the like frequently occur due to differences in mechanical conditions and setting conditions of each weight. May be included. The appearance of this untwisted portion often appears in a fixed cycle, and the presence and extent of the untwisted portion can be clearly seen when the cloth is used.

Therefore, a certain amount of yarn is taken from each synthetic fiber package, and the yarns are spliced one by one to form a continuous yarn, which is subjected to test knitting by a tubular knitting machine, and a large number of untwisted portions are produced by this trial knitting fabric. A check is made for the presence of defective packages.

[0006]

However, when the yarns collected from a large number of synthetic fiber packages are spliced and test knitted, the division of each package is judged by the splicing of the yarns. However, the seam of threads appears only at one point on the surface of the cloth, and it is difficult to distinguish them, and it takes time to identify the defective package.

The present invention has been made in view of the above problems of the prior art, and an object thereof is, for example, a yarn in which a seam formed by a yarn splicing portion after knitting can be clearly discriminated. It is to provide a yarn splicing method and a yarn splicing device.

[0008]

[Means for Solving the Problems] A yarn splicing method for solving the above-mentioned problems is a method of splicing tails at both ends generated during splicing.
In this method, when one of the tails is lengthened and introduced into the yarn splicing nozzle for splicing, the yarn splicing is performed while sucking at least a long tail from before the operation of the yarn splicing nozzle to after the suction of the yarn splicing nozzle.

A yarn splicing device therefor is provided on both sides of a yarn splicing nozzle into which two yarns are aligned and introduced.
A yarn splicing device provided with a pair of cutters for cutting a tail of two yarns, wherein the distance to the yarn splicing nozzle of one cutter is longer than the distance to the yarn splicing nozzle of the other cutter. The apparatus is provided with a suction nozzle for sucking the yarn end cut by the cutter.

[0010]

When the tail is lengthened, it is the same as the length of the yarn splicing portion. When a cloth or the like is used, the yarn splicing portion appears as a seam of the line and can be seen at a glance. In order to make a yarn splicing device that lengthens one tail in this way, you only have to separate one of the cutters that cuts the tail, and keep the long tail pulled by the suction nozzle while the yarn splicing nozzle is operating. In this way, an independent tail is surely formed without being caught in the twist.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a yarn splicing method and a yarn splicing device of the present invention. FIGS. 1 (a) and 1 (b) are diagrams showing a yarn splicing step, and FIG. 1 (c) shows a yarn splicing portion. FIG.

In FIG. 1 (a), YD is a lower thread,
YU is the upper thread. Then, the yarn joining device 19 has a first upper thread shifting lever 61, a suction nozzle 71, a lower thread cutter 63, a second upper thread shifting lever 64, and an upper thread clamp 65 on the upstream side of the yarn joining nozzle 60. And the first bobbin thread shifting lever 66 on the downstream side of the yarn splicing nozzle 60,
The suction nozzle 72, the second lower thread shifting lever 68, the lower thread clamp 69, and the upper thread cutter 70 are arranged in this order.

In particular, the positions of the upper and lower cutters 63, 64 are different, and the distance L2 to the yarn splicing nozzle 60 of the upper thread cutter 69 is longer than the distance L1 to the yarn splicing nozzle 60 of the lower thread cutter 63. There is. The ratio of L1 and L2 is 1: 2 or more, preferably about 1: 3.

Next, a yarn joining method using the yarn joining device 19 will be described. In FIG. 1A, the upper thread YU and the lower thread Y
D is aligned with each other and the tail is extended vertically, and is pushed into the yarn splicing nozzle 60 by the second upper thread shifting lever 64 and the second lower thread shifting lever 68, and the upper thread YU and the lower thread YD are respectively clamped to the upper clamp 65. It is held by the lower clamp 69, and the tails of the upper thread Y1 and the lower thread Y2 are cut by the lower thread cutter 63 and the upper thread cutter 70, respectively. Before this cutting, the suction nozzles 71 and 72 have been operated, so that not only the longer tail 34 that has been cut but also the shorter tail has been sucked.
1,72 is sucked and pulled.

In FIG. 1B, most of the tails of the bobbin thread YU cut by the second upper thread pulling lever 64 and the second bobbin thread pulling lever 68 pushed further are cut.
Although the tail of the cut upper yarn YD is drawn into 0, the tail 34 is kept pulled by the suction nozzle 71 as shown in the drawing, although the tail of the cut upper yarn YD is drawn into the yarn splicing nozzle 60. Next, after pressing the yarn with the first upper thread shifting lever 61 and the first lower thread shifting lever 66, the splicing nozzle 60
Compressed air is blown into the inside, and the tails are entangled and twisted together to complete the yarn splicing.

Until the yarn splicing is completed, the suction nozzles 71 and 72 continue to operate, and it is possible to prevent the tail 34, which is particularly long, from being spoiled due to the influence of twisting by the yarn splicing nozzle 60. . Then, when the operation of the suction nozzle 71 is stopped and released from the state of FIG. 1B, the independent tail 34 remains in the downstream of the yarn splicing portion 32 as shown in FIG. 1C.

A development view of a cloth obtained by sequentially sampling the yarn having the tail 34 from a large number of packages, splicing the yarn and knitting the yarn will be described with reference to FIG.

[0018] For example, when sampling yarns from 10 packages are spliced and knitted, a continuous sample cloth 33 divided into 10 sections is formed. The presence or absence of a yarn defect is inspected by comparing the sample cloth 33 of 10 sections, in which the standard section 36 and the collar section 35 follow the 10 sections, with the standard section 36. Then, the sampling cloth 33 having a defect
In order to identify the number of the standard part 36 and the group of sampling cloths 33 of 10 sections, the color part 3
5 is inserted.

Even so, it is extremely difficult to distinguish the sampling cloths 33 from each other by the degree to which the yarn splicing portion becomes a point and expands. However, if the tail is knitted while having a long yarn splicing portion, the yarn splicing portion becomes conspicuous as a line like the seam 37, and the number of a defective package such as untwisted yarn can be specified easily and quickly. In addition, a defective package can be identified in correspondence with an ID such as a bar code on a peg tray on which the package from which the yarn is collected is placed, and the defective package can be automatically identified and discharged at the inspection station. .

Next, an example of a package conveying line in which the above yarn joining device is incorporated will be described with reference to FIG.
The figure (a) is a front view and the figure (b) is a top view.
In FIG. 3A, a surface yarn unwinding station S1 and a sampling station S2 are provided in the middle of the conveying line 1.
And a yarn knotting station S3 are arranged in that order.
Package P at each station S1, S2, S3
Stopper 6 so that tray 3 with inserted
a, 6b and 6c are provided so as to be projectable.

The surface yarn unwinding station S1 has a rotating device 12 and a suction mouth 13 as a first suction means.
And a movable first thread hooking lever 14 as a lifting means.
A fixed second yarn hooking lever 15, a suction pipe 16 as a second suction means, a cutter 17, and a yarn pulling lever 18 are provided. A yarn splicing device 19 is provided at the sampling station S2. Further, the yarns spliced by the yarn splicing device 19 are adapted to be taken in by a predetermined length by a drawing means on the side of various inspection devices.

In FIG. 3A, the package P is stopped at a predetermined position of the surface yarn unwinding station S1 by the stopper 6a. Then, the rotating device 12 lifts the package P as indicated by an arrow 95, and further rotates the package P as indicated by an arrow 96. Next, the suction mouth 13 turns toward the package P as indicated by the chain double-dashed line in FIG. The sensor 13d detects the package P, the turning of the mouse 13 is stopped, and a desired distance ε is secured.
Then, the suction mouth 13 sucks the yarn end. When the yarn end is sucked, the package P is rotating,
The yarn end is unwound and traverses up and down. And FIG.
1 (a) is locked in the recess 13b, the locked thread is detected by the sensor 13c, and the suction mouth 13 is moved to the position shown in FIG.
Retreat to the solid line position in (b). And the package P
A thread portion 82 from the to the opening 13a is formed.

Then, the first thread hooking lever 14 moves the thread portion 8
Hook 2 to go up. The first thread hooking lever 14 is inclined so as to fall in the raised position, and the hooked thread portion 82
Is transferred to the fixed second thread hooking lever 15. While sliding down the slope of the second thread hooking lever 15, the cutter 17
Operates to cut the yarn portion 82, and the yarn end reaching the package is sucked by the suction pipe 16. If this suction is performed for 2.5 seconds, for example, a yarn of about 25 m is unwound at high speed,
It becomes a regular thread.

When the yarn from the package P becomes regular, the yarn shifting lever 18 turns 180 ° to bring the yarn to the center line of the yarn splicing device 19. At the same time, the package P is moving to the sampling station S1 of FIG. Then, the upper yarn remaining in the yarn joining device 19 and the lower yarn from the package P are joined together. Then, the yarn of the desired length is drawn into the trial knitting machine through the fixed guide 20. In particular, the tail of the sampled yarn on the downstream side of the yarn splicing portion is long, and the seam becomes conspicuous when it is formed into a cloth. Then, the package P which has been sampled is sent to the yarn knotting station S3, and the yarn end cut by the yarn splicing device 19 is conveyed to the yarn knotting device 30 by the suction mouth 21 which rotates as shown by an arrow 97, and The desired knot 31 is formed by rotating and reciprocating the knotting device 30 as indicated by arrow 98.

At this sampling station S1,
Not only the sequential yarn splicing of the packages P sent on the transport line 1, but also the package P2 in which the standard yarn for comparison is wound and the package P3 in which the colored yarn for separating is wound.
It can be switched to. Therefore, the yarn splicing device 1
9, a relay pipe 22 and a shifter 23 are provided. Also during this switching, the yarn splicing device of FIG. 1 forms a long tail downstream of the yarn splicing portion so that it becomes conspicuous when the fabric is formed.

[0026]

According to the yarn splicing method and device of the present invention, the arrangement of a pair of cutters on both sides of the yarn splicing nozzle is changed, and a suction nozzle is provided on the longer tail to pull the yarn splicing during splicing. Keeping the above state, lengthening one tail of the yarn splicing part, preferably the tail downstream in the yarn running direction, and knitting the long tail together, the yarn splicing part appears as a seam of the line, and the yarn splicing part is obvious. To understand
The cloth can be easily classified for each package, and defective packages can be identified quickly and reliably.

[Brief description of drawings]

FIG. 1 is a diagram showing a yarn splicing method and a yarn splicing device of the present invention.

FIG. 2 is a development view of a fabric test-knitted at a yarn splicing portion according to the method of the present invention.

FIG. 3 is a front view of a main part of a synthetic fiber conveying line in which the device of the present invention is incorporated.

[Explanation of symbols]

 32 thread splicing part 33, 34 tail 59 thread splicing device 60 thread splicing nozzle 63 bobbin thread cutter 70 upper thread cutter 71, 72 suction nozzle L1 distance between splicing nozzle and bobbin cutter L2 thread splicing nozzle and upper thread cutter distance

Claims (2)

[Claims] 1. A nozzle for sucking in at least a long tail before and after the yarn splicing nozzle is actuated when one of the tails produced during yarn splicing is lengthened and introduced into the yarn splicing nozzle. A yarn splicing method, wherein yarn splicing is performed while suctioning inside. 2. A yarn splicing device in which a pair of cutters for cutting tails of two yarns are provided on both sides of a yarn splicing nozzle into which two yarns are aligned and introduced, and one cutter. The yarn splicing device is characterized in that the distance to the yarn splicing nozzle is longer than the distance to the yarn splicing nozzle of the other cutter, and a suction nozzle for sucking the yarn end cut by the other cutter is provided.