JPS6052062B2 - Thread knotting method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a yarn tying method, in particular, to the tail yarns (also referred to as transfer tails or picktails) of yarn packages that come and go when each yarn package is continuously processed in fiber manufacturing, processing, etc. Concerning ways to connect people of Japanese ancestry.

Conventionally, such thread tying has been carried out by simple manual tying or automatic thread splicing using various knotters, but with all of the conventional methods, the knot becomes large and the manufactured and processed yarn becomes too large. The knot had to be eliminated as an abnormality.

During the drawing, stretching or false twisting process of synthetic fibers such as polyester and polyamide, the yarn may break during processing or have abnormal yarn quality in the continuous part where the tail yarns of the yarn packages before and after are tied together. For example,
There is a problem in that the knots become stained and cannot be treated in the same way as normal threads.

In particular, in the friction method that has recently been adopted in the processing of synthetic fibers, the yarn rolls on the surface of a friction body (disk, pusher, belt, etc.) that rotates at a constant speed. Since the number of false twists, that is, the number of rotations of the yarn, is greatly influenced by the diameter of the yarn, this causes problems such as slipping at the knot and not imparting the knot. Not only that, but the quality of the yarn in the vicinity becomes abnormal. Therefore, when using such processed yarn,
When fabricated into woven or knitted fabrics, the knots become a defect and become a major industrial problem. The present invention has been devised in view of this problem and provides a thread tying method in which the knot is made smaller and the knotted portion can be handled in the same manner as normal thread.

In other words, in order to continuously process the front and rear multifilament packages, the present invention provides a method for connecting the tail threads of the front and rear packages to the Japanese line.
The margin for the Japanese thread or tail thread of the package was divided into two groups of single threads and tied together to form a first thread loop, and the space for the threads or tail threads of the other packages was divided into two groups of single threads. The method is characterized in that one group of single yarns is passed through the first yarn loop and tied with another group of single yarns to form a second yarn loop, thereby tying the tail threads of the preceding and following packages to the Japanese line. .

This will be explained below with reference to the drawings.

1 and 2 are explanatory diagrams of the thread tying procedure of the present invention.

First, first divide the yarn end Y1 of the tail yarn of the previous package or the opening yarn of the subsequent package into two groups of single yarns Yll.
, Yl2 and tie them together to form the first thread ring R1.
form. In this case, any method can be used to tie the single yarn groups Yll and Yl2, but it is preferable to tighten the knots by tightening the yarn loop. Next, the yarn end Y2 of the opening yarn of the next package or the tail yarn of the previous package is similarly made into two single yarn groups Y2l, Y2.

After passing the single yarn group Y2l through the first yarn ring R1,
The single yarn groups Y2l and Y22 are tied together to form a second yarn loop R2, and the yarn tying is completed. At this time, it is desirable that the knots N1 and N2 of the thread rings Rl and R2 do not overlap at the junction C of the thread rings R1 and R2. Preferably, the distance between the junction point C and each knot Nl, N2 is 2 m/7 TL or more. Also, each knot Nl, N2
It is necessary to make the yarn end as small as possible. When the tied yarns are subjected to processing in this way, as shown in Fig. 3, due to the tension during processing, the joints between the yarns Yl and Y2 are caused by the engagement C of the yarn loops by the split single yarn groups. , since the knots Nl and N2 of each thread ring are made by tying together a group of divided single yarns, the number of knots is reduced by half compared to a knot made by simply tying together multifilaments Y1 and Y2.

As mentioned above, it is desirable that the yarn ends at knots N1 and N2 of each single yarn group are as small as possible, but cutting with scissors has a limit, and in the case of thermoplastic fibers such as polyester fibers, the knots must be heated. By heat shrinking or melting, the yarn end can be compacted and the knot can be made even smaller. Furthermore, if each package is made of undrawn synthetic fiber yarn, each end yarn and tail yarn portion may be cold-stretched once and then tied together, thereby increasing the strength of the knot and making it possible to further reduce the size of the knot. As described above, when tying multifilament packages together, the present invention divides each opening thread and tail thread to form thread loops and then splices them together, so that the knots are small and the knots during thread processing are It is said that various troubles caused by this can be resolved.

[Brief explanation of drawings]

FIGS. 1 and 2 are explanatory diagrams of the procedure for tying the thread according to the present invention, and FIG. 3 is an explanatory diagram of the knotted portion in the processing state.

Claims (1)

[Scope of Claims] 1. In order to continuously process the front and rear multifilament packages, when tying the tail threads and the tail threads of the front and rear packages, the thread ends of the tail threads or tail threads of the packages are divided into two single yarn groups. This is tied to form a first yarn loop, and one single yarn group obtained by dividing the end of the tail yarn or end yarn of another package into two single yarn groups is passed through the first yarn loop and the other A thread tying method characterized by tying the tail threads and the opening threads of the front and rear packages so as to form a second thread loop by tying together the single thread groups. 2. Claim 1, in which the joining point of the two thread loops and the position of the knot of each single thread group of the opening thread and/or tail thread are shifted.
Thread knotting method described in section.