JPS6043140B2 - Improvements in textile stitching - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to textile stitches or improvements thereto, and one object thereof is to provide an improved stitch for sewing together two or more pieces of material.

Although the present invention has particular application for sewing textile materials, it is not limited to textiles. The present invention is useful for sewing knitted fabrics, such as when sewing sleeves of knitted fabrics to make pullovers, jumpers, cardigans, etc., and for sewing these garments or pleated edges. It is particularly suitable and convenient for attaching collars. Such garments, particularly those of knitted fabrics, may be made depending on the finish of the material at the time of knitting, i.e. by adding or removing additional stitches to form the garment. It will be appreciated that, alternatively, it can be made by knitting the material into strips of cloth, then cutting the material into the desired shape and sewing the edges of each strip.

When cutting knitted fabric material into the desired shape and sewing each edge,
It will be appreciated that the edges to be sewn are rough edges, that is, they are messy and uneven and are not edges.

When suturing such edges, considerable difficulty may be encountered in effectively suturing all the threads that make up the material to the adjacent pieces of material. For example, it will be appreciated that when one of the loops in the rough edges of a knitted fabric material is captured by a thread and sewn to another piece of fabric, the possibility arises that a particular thread becomes unraveled. Conventionally, therefore, the rough edges of the knitted material are sufficiently sewn together to allow the individual loops of knitted material to rest on the points of a chainstitch sewing machine, and then each of the threads is conveniently sewn into a single thread. It was customary to use chain stitch stitching.

British Patent No. 1016531/2/3 describes details of a single chain chain chain stitch sewing machine. The chain stitch sewing machine is an improvement over the chain stitch sewing machine that was conventionally known at the time the above patent was filed.

The specification of this patent describes the application of a single chain stitch to stitch two or more pieces of fabric. However, the purpose of the present invention is to apply multiple stitches to sufficiently stitch all the threads and loops of the loosely knitted fabric, thus eliminating the possibility of unraveling or unraveling of the fabric. do.

According to the invention, the material comprises at least one first chain link stitch arranged near the seam edge of the material and at least one second chain link stitch extending beyond the seam edge; A double chain link stitch is a stitch in which the loop of the second chain stitch pierces the suture material at a position further away from the suture edge than the position where the first chain link stitch pierces the material. A stitch is provided for suturing two or more pieces of material, the edges being sutured "adjacent", characterized by being present on the loop and the sutured edges.

The present invention provides at least four types of chain loops that can be formed by a chain stitch sewing machine having a needle with a hook and a hook closing latch so that the needle threads the fabric from one side to the other. Thread is fed to the hook during side piercing, and when the needle is withdrawn from the fabric, the latch covers the hook to allow the thread to be pulled from the fabric.

The needle is then moved relative to the fabric so that it pierces the fabric again at an adjacent point, and another loop is similarly pulled out of the fabric, as the second loop is pulled out and the first The loop is removed from the needle. Because,
This is because the new loop is retained in the latched hook and can be pulled through the old loop. According to the invention, four needles can be provided, each with a thread, the first of which is located close to the edge to be sutured, and the second of which is located further away from this edge. so that the pair of chain loops are positioned one above the other in close proximity to the edge. A second pair of chain loops is then formed which pierces the fabric of the two first mentioned chain loops, with one needle forming the first of the latter chain loops and piercing the fabric first. , and then extended beyond the fabric in a subsequent advancement step, such that the chain loop has a thread portion captured within the fabric and extending beyond the fabric. The second needle again loops two types of chain loops one after another to form an overlock chain loop, and the second needle that forms the overlock chain loop passes over the first overcast chain loop. and has threads extending beyond at least one of the first-mentioned chain loops. Therefore, according to the present invention, the stitch consists of four types of chain link stitches,
The first one is located adjacent to the edge to be sewn and the second one is located further apart from said edge so that the first and second chain link stitches are placed above and below the edge. , third and fourth chain link stitches penetrate into the material further apart from said edge to be sewn than the first and second chain link stitches, and said third and fourth chain link loops pierce the fabric and extend beyond the stitched edge, such that the chain loop has a portion of thread that extends beyond the stitched edge and extends beyond the threads forming the first and second chain link stitches; An edge-to-edge stitch is provided in which the four-chain link stitch extends beyond the third chain link stitch.

The number of overlock chain loops in the latter two types is 2 as mentioned at the beginning.
Half the number of chain loops that pierce the fabric as seed chain loops.

This is because each time the dial rotates one space, the needle makes a chain loop, and the overlock needle first pierces the fabric and then extends beyond the fabric, so this overlock needle creates the chain loop mentioned earlier. Pierce the fabric half the number of times to form a loop. Therefore, if the first-mentioned needle forms a chain loop each time it passes through the fabric, the overlock needle will form half the chain loops that penetrate the fabric and half of the chain loops that go beyond the fabric. Probably. It will be appreciated that, according to the present invention, the operator no longer needs to place the fabric over the points of the chainstitch sewing machine and engage the knitted loops of the fabric to each point.

This is because each loop does not need to be fully captured in a single strand. The formation of loops in the material by providing at least two chain loops located close to each other, one of which is spaced further from the edge of the suture material, and also by providing two overlock chain loops. All possible combinations of placement are obtained, so there is no possibility that any part of any fabric loop will not be captured by one of the four chain loops, so two pieces of fabric are sufficient. is sutured to.
A cutting device is preferably present to remove excess fabric before the overlock chain loop is formed. In the simplest stitch structure of the invention, a type of chain loop is formed by the needle piercing the fabric each time, and an overcast stitch is formed by the needle alternately piercing and crossing the fabric. There is a loop.

The needle forming the overlock chain loop must pierce the fabric on the opposite side of the first mentioned chain loop to the seam edge. Alternatively, two chain loops and one overlock chain loop formed by a needle that pierces the fabric each time, or one that is formed by a needle that pierces the fabric each time.
It is also possible to form a stitch with three threads by means of a seed chain loop and two overlock chain loops.

In all cases, the overlock chain loop must be formed by means of a needle that pierces the fabric on the side remote from the other chain loop to the seam edge. If this condition is not met, the overlock chain loop may pull out of the fabric and unravel. Furthermore, according to the invention, the material to be sewn is positioned on a radially extending point of the chainstitch sewing machine;
The sewing machine has at least two suturing needles, the first needle reciprocating against the material to suture the material by forming a single chain link stitch, and the second needle reciprocating against the material to suture the material by forming a single chain link stitch. forming a chain link stitch with a loop, the loop extending beyond the edge to be sewn and extending beyond the thread forming the first chain link stitch; A method of suturing two or more pieces of material adjacent to each other is provided. In order to further facilitate understanding of the present invention, the present invention will be described below with reference to the accompanying drawings.

Turning first to FIG. 1, a series of simple chain loops A are formed by conventional methods, such as those described in detail in the above-identified patent specification of the applicant.

FIG. 1 shows the formation of the loops without showing any textile material.

The row of loops A is for the edges of the pair of fabrics to be sewn together.
It is located closer to the row of similar strand loops D. Between rows A and D of simple chain loops extend a pair of chain loops, designated B and C. For the purpose of explanation, loop B is shown as a thick line, and loop C is shown as a hollow line. Each of loops B and C is staggered and consists of half the number of loops as the number of le hoops in columns A and D. To form loops B and C, the needle first pierces the fabric and is withdrawn to the initial side, then extends over the top of the fabric, captures the thread again and is pulled back, thus allowing the needle to pass through the fabric. It will be understood that a new loop is formed by passing through the old loop formed when the needle is first pierced and pulled out. As can be seen in detail in Figure 2, loops A and D are attached to a pair of fabrics F.
1 and F2 loops L1 and L2 and L" and L2" are shown being sutured in a substantially conventional manner.

However, although loops A and D are shown one for each of loops L1 and L2 for illustrative purposes, in reality chain loops A and D are randomly arranged with respect to loops L1 or L2 of fabrics F1 and F2. It is understood that this could be the case. Similarly, loops B and C also have each adjacent loop L1
and one loop for L2, but in reality these loops could be randomly placed. Loops B and C are formed such that loop C lies above and captures overlock loop B relative to fabrics F1 and F2, although it was clear that loop C was formed after the formation of loop B. First, all chain loops A are connected to fabrics F1 and F2 by both loops B and C.
is sufficiently fixed and captured by the threads of the and loop C
also captures loop B. This ensures that even if any break occurs in any thread at any time, separation of the fabric at the seam will not occur due to the formation of chain loops. This is because the loops are all captured by each other. FIG. 3 illustrates how two pieces of fabric F1 and F2 are secured by loops A, D and C and B to form a neat seam.

As is clear from this, the rough edges of fabrics F1 and F2 are cut to a uniform height after forming loops A and D and before forming overlock loops C and B. According to the present invention, a secure suture stitch is provided in the sense that it securely sutures the material.

Furthermore, based on the nature of the chain loops, the seam is endowed with elasticity, i.e., an elasticity of 1 (πVe) Retained. Finally, the stitch of the present invention eliminates the need for a skilled person to place the knitted loop onto the point of a chainstitch sewing machine.

A device for forming stitches according to the invention is described in detail in the applicant's UK Patent Application No. 55324/74.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the arrangement of four types of chain loop stitches according to the present invention; Fig. 2 is a perspective view similar to Fig. 1 showing the relationship of chain loops to links of a knitted fabric; 1 is a schematic diagram showing two pieces of fabric sewn together at opposite edges. A, B, C, D...Loop, Fl, F2...Fabric,
Ll, L2, L", L2"...Fabric loop.

Claims (1)

Claims: 1 at least one first chain link stitch disposed near the seam edge of the material and at least one second chain link stitch extending beyond the seam edge; The second chain link stitch is formed by passing through the suture material at a position further away from the suture edge than the position where the first chain link stitch pierces the material, so that the loop of the second chain link stitch becomes the first chain link stitch. A stitch for suturing two or more pieces of material whose edges are sutured adjacent to each other, characterized in that the loop is present on the sutured edges. 2. It has three types of chain link stitches, two of which pass through the fabric to form a single chain link stitch, and the remaining one
2. A suture stitch according to claim 1, wherein the seed is similar to said second chain link stitch and has a suture edge and a loop present on said two single chain link stitches. 3. It has three types of chain link stitches, one of which passes through the material and is the same type as the first chain stitch, and the remaining two are the same type as the second chain stitch and are used for sewing edges. 2. The suture stitch of claim 1, further comprising a loop extending beyond the first chain link stitch. 4. At least four types of chain link stitches, two of which are of the same type as the first chain link stitch, and the remaining two are of the same type as the second chain link stitch. The suture stitch described in Section 1. 5. The suture stitch according to claim 3 or 4, wherein the second chain loop has half the number of chain loops that pierce the material as two first chain loops. 6 Consisting of four chain link stitches, the first of which is located adjacent to the edge to be sewn, the second of which is located further apart from said edge, thereby forming the first and second The chain link stitches are placed vertically adjacent to the edge, and the third and fourth chain link stitches are placed further apart from the edge to be sewn into the material than the first and second chain link stitches. threading, said third and fourth chain link loops piercing the fabric and extending beyond the stitched edges such that the chain loops carry threads that extend beyond the stitched edges and form the first and second chain link stitches. A stitch for suturing two or more materials in which edges are sutured adjacent to each other, the fourth chain link stitch having a thread portion extending beyond the third chain link stitch.