JP5547930B2 - Multi-needle flat stitch machine and decorative stitches - Google Patents

Description

  The present invention relates to a multi-needle flat stitch sewing machine configured to give decorativeness to the surface of a fabric and a decorative stitch formed by the sewing machine.

  As a conventional multi-needle flat stitch sewing machine, a sewing machine having a needle that moves up and down and a spreader that swings horizontally on a cloth stacking surface is known (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 6-46678 (2nd page, Fig. 1)

  Further, as an example of a decorative stitch formed by the sewing machine of the above-mentioned Patent Document 1, one having three needle threads, one looper thread and a decorative thread is known (for example, “Non-Patent Document 1” (See “Stitching the Indicating Symbol 605”). As shown in FIG. 4, the three needle threads 1, 2, and 3 are arranged at predetermined intervals on the needle side (fabric surface side) of the cloth. The loops 1L, 2L, and 3L of each needle thread pass through the loop 4a, 4b, and 4c of the looper thread 4 and the other loop 4e of the looper thread 4 through the loop 4a, 4b, and 4c. Other thread looping. The looper yarn 4 is arranged on the back side of the cloth.

“JIS stitch type classification and display symbols JIS L 0120-1984”, established on July 1, 1984, published by the Japanese Standards Association, p. 24-25

However, with respect to the above-mentioned decorative stitches, demand has increased in recent years as part of the design of sewn products, and more decorative decorative stitches have been demanded. Was long-awaited. In addition, in the stitch of the display symbol 605, when the cloth surface side is viewed remotely, only the width of the stitch line can be grasped due to the influence of the decoration loop of the decorative thread. ”Was sometimes mistaken. That is, it may be mistaken whether the decorative stitch is formed with a three-needle sewing machine or a two-needle sewing machine.
Accordingly, a first object of the present invention is to provide a multi-needle flat stitching machine capable of forming a new stitch having a high decorativeness, and three needle threads are spaced at a predetermined interval on the cloth surface side. It also aims to provide decorative stitches that can be easily confirmed.

  In order to achieve the above object, the present invention comprises a sewing machine arm having three needles that move up and down and a spreader that swings horizontally on the fabric loading surface, and supplies decorative threads to the upper surface of the stitches. In a multi-needle flat stitch sewing machine configured to sew a decorative pattern, a fixed thread guide fixed to the sewing machine arm and having a first long hole and a second long hole arranged in parallel above the spreader, and a spreader arranged in parallel. It is characterized by comprising two hooks that engage with the decorative thread.

  In addition, there are three needle threads arranged at a predetermined interval, one looper thread and two decorative threads, and the decorative thread decorative loop in which the needle thread loop has already crossed the cloth surface side; In the decorative seam that loops through the cloth and the other three loops of the looper thread and loops the other loop of the looper thread and the other thread, the loop of the one decorative thread is each needle thread loop on the cloth surface side. The decorative loop of the other decorative thread is inserted into the central needle thread loop and the right needle thread loop on the cloth surface side.

  According to the invention of claim 1 of the present application, since the fixed yarn guide having the first elongated hole and the second elongated hole arranged in parallel and the two flange portions arranged in parallel with the spreader are provided, two decorations are provided. Yarn can be fed to the upper surface of the seam. Also, by the horizontal swing of the spreader as the needle moves up and down, one ornamental thread ornament loop is inserted into each needle thread loop on the fabric surface side, and the other ornamental thread ornament loop is centered on the fabric surface side. It can be inserted through the loop and the right needle thread loop, and a new seam rich in decoration can be formed.

  According to the invention of claim 2 of the present application, one decoration loop of one decorative thread is inserted into each needle thread loop on the cloth surface side, and the other decorative loop of the decorative thread is connected to the center needle thread loop and the right side on the cloth surface side. Since it is inserted through the needle thread loop, it is easy to confirm that the three needle threads are arranged at a predetermined interval on the cloth surface side even when the cloth surface side is viewed remotely. As a result, it can be confirmed whether or not the target decorative stitch is formed by a three-needle sewing machine.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the decorative sewing machine according to the present invention has a lower shaft 10 connected to a motor. A needle bar 11 protruding downward from the sewing machine arm MA has a needle stock 12 at the lower end, and needles 13, 14, 15 for needle thread and a movable yarn guide 16 for decorative yarn are attached to the needle stock 12. . The movable yarn guide 16 is bent in the middle and has a "<" shape, and has a lower end portion having a hole for inserting a decorative yarn. The spreader 17 is fixed to a swing shaft (not shown) that protrudes downward from the sewing machine arm MA, and its tip is provided with two flange portions 17a and 17b. The fixed yarn guide 18 is fixed to the sewing machine arm MA, and a lower end thereof is provided with a first long hole 18a and a second long hole 18b.

  When the lower shaft 10 rotates with the operation of the motor, the needles 13, 14, and 15 attached to the needle stock 12 reciprocate up and down together with the needle bar 11. At that time, the spreader 17 swings horizontally. When the spreader 17 swings to the left on the cloth loading surface of the sewing machine bed MB, the collar portion 17a on the tip side captures the decorative yarn 5, and the intermediate collar portion 17b captures the decorative yarn 6. Although not shown, the needle threads 1, 2, and 3 are inserted into the needles 13, 14, and 15, respectively, and the machine bed MB includes a looper that moves forward and backward in conjunction with the rotation of the lower shaft 10.

  Thereafter, the left needle 13 descending through the top dead center passes behind the decorative thread 5 extending from the first elongated hole 18a of the fixed thread guide 18 to the spreader collar 17a. At this time, the middle needle 14 that descends in the same manner as the left needle 13 is a decorative thread 5 extending from the first long hole 18a of the fixed thread guide 18 to the spreader collar part 17a, and from the second long hole 18b of the fixed thread guide 18 to the spreader collar part. It passes behind the decorative yarn 6 reaching 17b. When the right needle 15 is lowered, the decorative thread 5 extending from the first long hole 18a of the fixed thread guide 18 to the spreader collar part 17a and the decorative thread 6 extending from the second long hole 18b of the fixed thread guide 18 to the spreader collar part 17b are located. Will pass. As shown in FIG. 2, the cloth W is pressed against the cloth loading surface of the sewing machine bed MB by the presser foot 19, and the tips of the needles 13, 14, 15 penetrate the cloth W from above while being lowered.

  The decorative stitch formed by the decorative sewing machine according to the present invention includes three needle threads 1, 2, 3, one looper thread 4, and two decorative threads 5, 6. The three needle threads 1, 2, and 3 are arranged at a predetermined interval on the surface side of the cloth W. The loops 1L, 2L, and 3L of each needle thread pass through the loops 4a, 4b, and 4c divided into three, the decorative loop of the decorative threads 5 and 6, the cloth W, and the looper thread 4. Looping with the loop 4e is performed. The looper yarn 4 is arranged on the back side of the cloth W.

  The decorative yarns 5 and 6 will be described in detail. The decorative yarn 5 forms decorative loops 5a and 5b extending horizontally on the surface side of the cloth W on the left and right as shown in FIG. The left decorative thread loop 5a is inserted through the left and central needle thread loops 1L and 2L, and the right decorative thread loop 5b is inserted through the right needle thread loop 3L. The decorative yarn 6 also forms decorative loops 6a and 6b extending horizontally on the surface side of the cloth W on the left and right. The left decorative thread loop 6a is inserted through the central needle thread loop 2L, and the right decorative thread loop 6b is inserted through the right needle thread loop 3L. That is, the decoration loop of one decoration thread 5 is inserted into each needle thread loop 1L, 2L, 3L on the surface side of the cloth W, and the decoration loop of the other decoration thread 6 is the center needle thread loop 2L on the surface side of the cloth W. And the right needle thread loop 3L.

  In the present embodiment, the eye of the movable yarn guide is shared by the two decorative yarns. However, the present invention is not limited to this. For example, the shape of the movable yarn guide is inverted Y and each lower end A dedicated eye hole may be provided in the part. Although not described in detail in the present embodiment, if the color scheme of the decorative yarns 5 and 6 is changed for each, the decorativeness becomes richer. Further, when the “stitch of the display symbol 605” of Non-Patent Document 1 is formed in the present embodiment, the decoration thread is one and the thread path is the first elongated hole of the fixed thread guide 18 from the eye of the movable thread guide 16. It is good to make it follow along the collar part 17a of the spreader 17 through 18a.

1 is a front view showing a decorative sewing machine according to the present invention. It is explanatory drawing which showed the principal part of the sewing machine. In the perspective view which showed the decoration seam which concerns on this invention, the figure of the right side shows the cloth surface, and the figure of the left side has shown the principal part of the cloth back surface. It is the perspective view which showed the conventional decoration stitch.

1, 2, 3 Needle thread 1L, 2L, 3L Needle thread loop 4 Looper thread 5, 6 Decoration thread 5a, 5b, 6a, 6b Decoration loop 17 Spreader 18 Fixed thread guide 18a, 18b Long hole MA Sewing arm W Cloth

Claims (2)

The sewing machine arm is equipped with three needles that move up and down and a spreader that swings horizontally on the fabric loading surface, and is configured to sew a decorative pattern by supplying decorative threads to the upper surface of the seam. In the multi-needle flat stitch sewing machine,
A fixed thread guide fixed to the sewing machine arm and having the first long hole and the second long hole arranged in parallel above the spreader;
A multi-needle flat stitch sewing machine comprising two ridges that are juxtaposed to a spreader and engage with a decorative thread. Three needle threads arranged at a predetermined interval, and one looper thread and decorative thread,
Decorative sewing that loops the loop of the looper thread through another loop of the looper thread through the loop of the loop of the looper thread that passes through the loop of the decorative thread and the loop that the needle thread loop has already crossed to the cloth surface side. In the eyes
Make sure that the decorative loop of one decorative thread is inserted through each needle thread loop on the fabric surface side, and the decorative loop of the other decorative thread is inserted through the center needle thread loop and the right needle thread loop on the fabric surface side. The decorative stitch formed by the multi-needle flat stitch sewing machine according to claim 1 .

Images