JPS6324155Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field The present invention relates to a warp knitted fabric having a chain stitch that is extremely difficult to fray from the cut edge, and also has a chain stitch that does not cause the phenomenon of needle breakage caused by sewing machine needles, etc. during sewing. This relates to warp knitted fabrics.

(b) Prior art The ordinary chain stitch in warp knitted fabric is composed of one thread as shown in Fig.
As is well known, there is a problem that it easily frays. In order to solve this problem, the fourth
As shown in the figure, two yarns 41 and 42 are knitted continuously in the same course, and as shown in FIG. Proposed methods include one in which a missing portion 53 of a course is provided and one in which two threads 61 and 62 are knitted alternately in every other course as shown in FIG.

(c) Problems to be solved by the invention However, it is not possible to knit two threads 41 and 42 continuously in the same course at the same time, or to knit one thread 51 at the same time.
is knitted continuously, and the other yarn 52 is knitted with a missing part 53 of one course every required number of courses (see Figs. 4 and 5), in which one loop is knitted into two.
Because of the overlap, it not only gave a rough texture but also required a large amount of yarn, making it unsuitable for use in thin warp-knitted lace fabrics, especially those used in lingerie-related fabrics.

In addition, a structure in which two threads 61 and 62 are knitted alternately every other course (Fig. 6) can avoid the rugged texture of the former, but it is hardly effective against the problem of fraying. I didn't show it. In other words, in chain knitting having this structure, no matter which part is cut, the yarn ends 63 and 64 are extremely short, so the phenomenon that the loops are tightened due to tension on them does not occur, and the fraying progresses. However, once the fraying has progressed considerably, if one of the two threads is actively pulled, the loop will tighten and fraying can be prevented.
In this case, when two threads are pulled simultaneously,
It becomes impossible to prevent fraying. In other words, even if two threads are pulled at the same time, the tension is concentrated on one thread, tightening the loop, and preventing fraying. In order to prevent this, there must be a difference in length between the two threads. However, since the yarn length of one loop is extremely short especially in fine gauge thin warp knitted lace fabric, in a chain stitch structure in which the threads are knitted alternately every other course, there is a difference in the length of the two frayed ends. The lengths are almost the same, the tensile force is evenly divided between the two threads, and the alternately woven loops easily become unraveled one after another. Furthermore, one of the factors that promotes this phenomenon is that the above-mentioned chain stitch has a structure in which a loop is formed for one course and then the next course is not knitted. is absorbed into the loop portion 66 and the loop itself becomes loose, which is a major cause of fraying. Moreover, since the unknitted part 65 is short by only one course while using two threads, it is difficult for the loop part 66 and the unknitted part to separate, and when sewing these, the sewing machine needle It was also impossible to prevent the phenomenon in which the two threads 61 and 62 were cut at once.

The present invention was developed in view of the fact that the above-mentioned problems existed even in chain stitch using two threads in the prior art. It provides knitted fabrics.

(d) Means to solve the problem In other words, as shown in Figure 1, two threads 11, 1
When knitting one chain stitch using 2, it is a warp knitted fabric having a chain stitch in which two yarns 11 and 12 are alternately knitted every required plurality of courses.

To explain this according to an example, one yarn 11 is now knitted in three courses. During this time, the other yarn 12 is not knitted in three courses. Next, the other yarn 12 is knitted in three courses, and during this time, the one yarn 11 is not knitted in three courses. This is repeated to knit a chain stitch. It goes without saying that every 3 courses may be every 2 courses, or every 4 courses, etc., and the number of courses within one thread may be 4 courses, 2 courses, 3 courses, 2 courses, etc. It goes without saying that it is okay to change freely.

(e) Effect If knitting is performed as described above, even if two threads are knitted alternately, each thread will always have at least several loops in succession, so the loops will not loosen and the main chain will be formed. The editing becomes detailed and solid.
Moreover, since the non-knitted part 15 is appropriately long, it is easily separated from the knitted part 16, and the problem of the sewing machine needle cutting two threads at once during sewing is almost eliminated. In addition, even if any part of the main chain stitch is cut, the unknitted part 13 and the continuously knitted part 14 each have appropriate lengths, so either one of them will be cut in some way. The probability of being pulled due to contact or the like increases, and fraying can be prevented at the initial stage of cutting. Furthermore, both 13, 14
Even when the yarn is pulled simultaneously, there is a time margin for the loop in the continuously knitted portion 14 to be released, and during that time, the unknitted portion 13 does not form a loop. The tensile force is directly concentrated, which tightens the loop and prevents it from fraying.

Also, as shown in Figure 2, one thread 21 is always
If a structure is adopted in which the required number of courses of one yarn 21 is always greater than the required number of courses of the other yarn 22, as in the case where the other yarn 22 is always knitted together two courses at a time, the fraying phenomenon will occur. When fraying occurs, as the fraying progresses, there will be a difference in the length of the fray, and the longer the fray is, the more likely it will be pulled, making it possible to prevent fraying more reliably. Even if the two yarn ends 23 and 24 are pulled at the same time, as the fraying progresses, the difference in length between the two yarn ends 23 and 24 increases, and the tensile force concentrates on the shorter one, causing the fray to continue. It can be prevented.

It goes without saying that the present invention does not care about the type of stitches, such as open stitches or closed stitches, the knitting yarn used, the knitting device, etc.

(f) Effects of the invention By using this invention for warp knitted fabrics (particularly thin warp knitted lace fabrics such as those related to lingerie), there is no fraying phenomenon from the cutting area, so it can be cut into any shape, and the fabric can be cut into any shape. In addition, it has become possible to prevent fraying due to needle breakage caused by sewing machine needles, etc., or fraying due to damage due to use, and in particular, it has become possible to prevent fraying due to washing by consumers. Therefore, the product value has been greatly improved.

The effects of this invention, which has made it possible to provide durable, delicate, and extremely elegant materials, in this field are immeasurable.

[Brief explanation of drawings]

FIGS. 1 and 2 are actual views of an embodiment of the present invention, and FIGS. 3, 4, 5, and 6 are actual views of the conventional system.

Claims (1)

[Claims for Utility Model Registration] 1. A chain stitch in which two yarns 11 and 12 are knitted alternately at every required number of courses when knitting one chain stitch using two threads. A warp knitted fabric characterized by having 2. The warp knitted fabric according to claim 1, wherein the required number of courses of one yarn 21 is always greater than the number of courses required of the other yarn 22.