JPS6227834B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for sewing decorative strips such as lace to the edges of body fabric.

Conventionally, in women's underwear, etc., lace, lace elastic, etc. are generally sewn on the edge of the body fabric for decoration, but when sewing, usually on the W edge of the body fabric, as shown in Figure 1, to further increase the product value. A hem stitch D is applied to the edge to prevent fraying in this area, and a lace fabric L is applied to the front edge of the back body fabric W.
After overlapping one side, the body fabric W and the lace fabric L are sewn together using a double-needle interlock stitch, and the boundary between the two is hidden with the decorative thread E, and the pattern of the lace fabric is hidden by the seam to create an attractive appearance. I tried to minimize the damage as much as possible.

However, as mentioned above, this method requires two sewing steps: edge stitching and interlock stitching,
Furthermore, two sewing machines were required: an overlock sewing machine and an interlock stitch sewing machine.

This invention prevents the edges of the body material from fraying and covers the border with the top-dressing thread using a single sewing machine, and also covers the band-like object with the top-dressing thread. It is an object of the present invention to provide a sewing method that minimizes deterioration in the appearance of a strip-shaped article caused by the above-mentioned stitches. That is, in the method of the present invention, when a decorative strip is overlapped on the edge of body material and sewn together using a three- or four-needle interlock stitch sewing machine using a cover thread, a needle thread, and a looper thread, Of the three to four rows of needle thread stitches thus formed, the above-mentioned decorative thread is passed through two or three rows of needle thread stitches that are adjacent to each other, thereby covering the edge of the strip on the body fabric, and The present invention is characterized in that two to four rows of needle thread stitches, including needle thread stitches on which decorative threads are not hung, and the looper thread cover the edge of the body fabric below the belt-shaped object.

To explain this with drawings, Fig. 2 shows an example of a triple needle, and Fig. 3 shows its stitch structure. A first needle thread stitch 5 formed by a needle that pierces the body fabric 3 through the outer side of the end of a lace rubber or other decorative band 2 (hereinafter simply referred to as the band), and the band 2 and the body fabric. 3, and a third stitch 7 formed by a needle that passes through the band-like object 2 and passes outside the edge of the body material. Cover the border between the band 2 and the body fabric 3 with the top thread 1, and cover the edge of the body fabric with the third needle thread stitch and the looper thread 9 entwined with the stitch to prevent fraying at that part. Prevention is becoming more and more common.

For example, as shown in FIG. 4, the stitch shown in the figure is made on a three-needle interlock stitch sewing machine by moving back and forth between the middle needle _N2 and the right needle _N3 in synchronization with the spreader 11, and attaching the cover thread 1 to the tip. Passed carrier needle 12
is placed near the carrier needle to guide the cover thread, and when the carrier needle advances backward in the feeding direction between the middle needle and the right needle, the cover thread extending from the carrier needle 12 toward the supply source is guided to the right needle. When the spreader 11 moves forward and swings the top thread 1 to the left needle _N1 , and the carrier needle 12 advances between the middle needle and the right needle, As shown in the diagram, the needle drop of the left needle _N1 is inside the loop of the top thread, the needle drop of the middle needle is outside the loop on the front side, and the needle drop of the right needle is behind the top thread. Formed by setting.

This will be explained in more detail with reference to a to f of FIG. In addition, in the figure, the carrier needle 12 is a carrier 1 that swings around a vertical axis in conjunction with the main shaft.
5, and the thread guide 13 is also attached to the carrier 15 so that it can swing with the carrier and absorb the slack of the loosened top thread, but the former carrier needle is mechanically connected to the spreader. The needles may be connected to the spretzer and oscillate in conjunction with the movement of the spretzer, or a solenoid, air cylinder or other known device may be used to cause reciprocating linear movement between the needles. It can also be fixed in front of the needle in the feeding direction.

Also, in the same figure, needles N ₁ , N ₂ , N ₃ and looper 1
The seams formed by 7 are formed in the same manner as known interlock stitches, and detailed explanation thereof will be omitted.

Figure a shows the state when the spreader 11 starts to move forward and the carrier needle 12 starts moving forward, and the top thread 1 between the second needle thread stitch 6 and the carrier needle 12 is connected to the middle needle N. ₂ and right needle N ₃
A spreader 11 extends between each needle.
When passing in front of N ₁ , N ₂ , and N ₃ , he was caught (b
(Fig.), the center needle is reversed from _N2 and the front side of the needle is pulled to the left as the spretzer moves back and forth. In the state shown in Fig. c, where the spreader 11 moves further along with the top stitching thread and the carrier needle 12 enters between the center needle and the right needle, the top stitch thread is intersected with each needle as shown in FIG. Each needle is bent with a positional relationship, and at the stage where each needle pierces the fabric, the spretzer moves back, and the carrier needle is about to come out of the center needle and right needle, the top thread passes around the left needle and passes behind the center needle. (Fig. d), and when the carrier needle comes out from between the middle needle and the right needle, it extends toward the front of the needle from between the two needles (Fig. e), and reaches the position shown in Fig. F. ing.

In the case of the above method, the body material 3 is placed on the left side of the needle entry point toward the sewing machine, and the strip material 2 is placed on the right side of the pocket. Change the range or reduce the amount of oscillation to make the loop of top thread 1 smaller.
The needle drop of _N1 may be located outside the loop, and the needle drop of middle needle _N2 may be located inside the loop (see FIG. 6).

Furthermore, in the existing three-needle interlock stitch sewing machine, the spreader, looper, and needle are arranged symmetrically with the existing one, and as mentioned above, the range of swing of the spreader is changed or the amount of swing is reduced, so that it can be moved from the left side to the right side. If you make the loop of the top thread that extends to the top smaller and position the needle drop of the right needle outside the loop and the needle drop of the middle needle inside the loop, the body fabric and the obi will be placed on the left side of the needle drop. , the latter can be engaged by the interlock stitches arranged on the right side.

The above example shows an example of three needles,
As another example, in four-needle interlock stitching, of the four rows of needle thread stitches, the top thread 1 is wrapped around two rows of needle thread stitches (Fig. 7), or three rows of needle thread stitches are used. An example of this is the one that spans the area (Figure 8).

In addition, when performing four-needle pseudo-interlock stitching by using a carrier needle as shown in Fig. 4,
Change the range of swing of the spreader or reduce the amount of swing to make the top thread loop smaller, so that the left end needle entry is located outside the loop, and move the carrier needle between the right and neighboring needles. By moving the sewing needle forward and backward, it is possible to form a novel decorative pseudo-interlock stitch in which the top thread is wrapped around the second and third needle thread stitches as shown in FIG.

According to the method of the present invention, it is possible to cover the boundary between the body fabric and the band-like object with the top-dressing thread and to prevent the edges of the body fabric from fraying in one step using one sewing machine, and also to prevent the edge of the body fabric from fraying. Since the width of the covering thread can be made relatively narrow, it is possible to reduce the deterioration in the appearance of the band-like article.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a conventional example, Fig. 2 is a schematic diagram of a seam used in the present invention to sew body fabric and a belt-like object, Fig. 3 is a perspective view of the seam structure, and Figs. FIG. 5 is a schematic diagram showing one process of forming a seam; FIG. 6 is a schematic diagram showing one process of forming a seam by another method; FIGS. 7 and 8 are another example. Example Schematic Figure 9 shows a schematic diagram of a further embodiment. 1... Top decoration thread, 2... Band-like object, 3... Body fabric, 5...
First needle thread stitch, 6...Second needle thread stitch,
7... Third needle thread stitch, 9... Looper thread.

Claims (1)

[Claims] 1. When overlapping a decorative strip on the edge of body material and sewing it together using a three- or four-needle interlock stitch sewing machine using a cover thread, needle thread, and looper thread, Out of the four rows of needle thread stitches, the above-mentioned top-dressing thread is passed through two or three rows of needle-thread stitches that are adjacent to each other to cover the edge of the band-like article on the body fabric, and the above-mentioned top-dressing thread is not hung. A method for sewing a band-like object onto an edge of body material, characterized in that the edge of the body material below the band-like object is covered with two to four rows of needle thread stitches, including needle thread stitches without needle thread, and the looper thread.