JP5941271B2 - Pseudo double ring seam structure and multi-needle sewing machine forming the seam - Google Patents

Description

  The present invention is a novel pseudo double ring lower decorative seam structure comprising a plurality of parallel needle thread stitches formed through the fabric, and a lower thread combined with each needle thread stitch on the back of the fabric, The present invention relates to a multi-needle sewing machine that forms the seam.

  The double underlay stitch structure of the stitch standards 406 and 407 defined in JIS L 0120 consists of two or three parallel needle thread stitches formed through the fabric and each row of needle thread stitches on the back of the fabric. The lower thread is looped through a needle thread loop formed simultaneously in each row of needle thread stitches, one side of which is formed in the next row of needle threads The underlay yarn which is hung in a zigzag manner and exits the needle thread loop of one end of the needle thread stitch row is configured to be passed through a needle thread loop formed before and after the loop.

  The multi-needle double chain stitch sewing machine that forms the above-mentioned double-ring-under decorative seam structure carries two or three needles that carry needle threads and are aligned in the direction perpendicular to the cloth feed and move up and down in conjunction with the main shaft. A needle formed by each of the above-mentioned needles, which carries a needle and a lower decoration thread, performs an elliptical motion consisting of a reciprocating movement in the direction in which the needles are arranged in synchronization with the vertical movement of the needle and a back-and-forth movement in the cloth feeding direction. And a looper for holding the yarn loop.

  Patent Documents 1 and 2 below disclose the double-ring lower decorative stitch structure and the multi-needle double-ring stitch machine.

JP 2000-218071 A JP 2010-233904 A

  An object of the present invention is to provide a novel pseudo double ring-underlay seam structure rich in elasticity compared to a conventional double ring-underlay seam structure, and a multi-needle sewing machine that forms the seam structure. To do.

The pseudo double ring lower decorative seam structure of the invention according to claim 1 is formed through the cloth, and includes a plurality of parallel needles including a needle thread stitch at one end and a needle thread stitch at the other end. a yarn stitching, the fabric back surface, said plurality of rows consists under fancy yarn which is coupled to the needle thread stitch of each row of lower fancy yarn needle thread stitch row of the other end from the needle thread stitch row of the one end The n-th formed lower edge thread loop is looped over only the n + 1-th formed needle thread loop of the other end row in a state in which the inside of the n-th formed needle thread loop is looped up to pseudo-double ring stitch structures with.

The invention according to claim 2 relates to a multi-needle sewing machine that forms the pseudo double ring underlay stitch structure of the invention according to claim 1, and carries the needle thread in parallel with the direction perpendicular to the cloth feed, It carries a plurality of needles that move up and down in conjunction with the main shaft and a lower decoration thread, and only reciprocates in the direction in which the needles line up in synchronization with the vertical movement of the needles, and rises from the bottom dead center during forward movement A looper that scoops up the needle thread loop formed by the needle and moves away from the needle thread loop when returning, and a looper tip that reciprocates in conjunction with the main shaft and protrudes through the needle thread loop of each needle during forward movement engage under fancy yarn of, for the next stitch forming pushed open the cloth feeding direction front side, of the plurality of needles to be lowered, consisting hook form loops only needle of the other end enters Multi-needle sewing machine.

  The pseudo double ring-shaped ornament seam structure of the invention according to claim 1 is passed through each needle thread loop while looping, and is passed through each needle thread loop like the conventional double ring-decorated stitch structure. One side of the lower garment thread is not zigzag on the needle thread loop of each row to be formed next, and the needle thread loop of one end of the row is not hung on the loop of the lower garment thread Since it is only connected by one underliner thread, since the binding force of the front and back needle thread stitches by the underliner thread is weak, the seam is easily expanded and contracted.

  By the multi-needle sewing machine of the invention according to claim 2, the pseudo double ring lower decorative stitch structure of the invention of claim 1 can be obtained.

  In addition, the looper of a multi-needle sewing machine that forms a traditional double-ring underlay stitch is a combination of reciprocating motion (left-right motion) in a direction perpendicular to the cloth feeding direction and reciprocating motion (forward-backward motion) in the fabric feeding direction. In the multi-needle sewing machine of the present invention, the looper only reciprocates in the direction in which the needles are arranged, and the mechanism for moving the looper back and forth in the cloth feed direction is provided. Since it becomes unnecessary, the looper driving mechanism is greatly simplified and the looper can be driven at high speed.

The perspective view which shows the external appearance of a flat stitch sewing machine. The top view of the looper and hook which are arrange | positioned in the cylinder bed of the sewing machine shown in FIG. The side view of the action | operation mechanism of the hook shown in FIG. The disassembled perspective view of the action mechanism of a hook. The perspective view which shows a seam formation process. The perspective view which shows the next seam formation process. Furthermore, the perspective view which shows the next seam formation process. Furthermore, the perspective view which shows the next seam formation process. Furthermore, the perspective view which shows the next seam formation process. Furthermore, the perspective view which shows the next seam formation process. Furthermore, the perspective view which shows the next seam formation process. Furthermore, the perspective view which shows the next seam formation process. Furthermore, the perspective view which shows the next seam formation process. Furthermore, the perspective view which shows the next seam formation process.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows the appearance of a flat stitch sewing machine having a cylinder bed 2, except that it has a mechanism such as a spreader 1 that incorporates an upholstery thread into a needle thread stitch, and a known multi-needle double chain stitch sewing machine. There is no change, and the appearance structure of the sewing machine shown in FIG.

  FIG. 2 shows the internal structure of the cylinder bed 2, and a reciprocating mechanism (not shown) that carries an underlay yarn performs only a reciprocating linear motion in a direction perpendicular to the cloth feed, and a bottom dead center during forward movement. A loop 3 formed by an upper needle that rises from the loop, and a looper 3 that separates from the needle thread loop when returning, and a reciprocating rotation in the horizontal direction by an operating mechanism, and a ridge 4a formed at the tip during forward movement (See FIG. 4), the hook 4 engages and catches the lower decorative thread passed through the eye hole 3a of the looper 3 and pushes the lower decorative thread forward in the cloth feeding direction. As shown in FIGS. 2 to 4, the operating mechanism extends from the bed 5 into the cylinder bed 2 and is pivotally supported horizontally, and is fixed to one end in the cylinder bed 2 of the lower shaft 6 that rotates in conjunction with the main shaft. In the vertical plane supported by the eccentric wheel 7 and the sewing machine frame 8. A lever 9 that rotates backward, a link 11 that connects the eccentric portion 7 and the intermediate portion of the lever 9, an intermediate portion that is pivotally supported by the sewing machine frame 8, and one end that is connected to the upper end of the lever 9, 9 includes a horizontal lever 12 that reciprocally rotates in a horizontal plane by reciprocating rotation in a vertical plane, and the hook 4 is provided with a set screw at the other end of the horizontal lever 12 (FIG. 2 shows a shaft portion of the set screw 13). Is shown).

  As described above, the hook 4 fixed to the horizontal lever 12 reciprocally rotates in the horizontal plane together with the horizontal lever 12, but a long hole is formed in the attachment base of the hook 4 so that the rotation radius of the tip can be adjusted. 14 is formed, and the horizontal lever 12 is put in and out of the slot 14 so that the position can be adjusted.

  The lever 9 is also formed with a longitudinal long hole 16 in the middle portion, and the link 11 is connected to the position of the link 11 by a set screw 17 passed through the long hole 16 so that the connection position is adjusted up and down. The reciprocating rotation amount of the lever 9 and the hook 4 can be adjusted.

  The looper 3 of the above-described embodiment is configured to perform a reciprocating linear motion, and a swinging shaft that reciprocally rotates in conjunction with the lower shaft 6 is disposed in the lower part of the cylinder bed along the cloth feeding direction. The looper 3 may be reciprocally rotated in the vertical plane by the swing shaft.

  Further, the hook 4 may not be reciprocally rotated but may be reciprocated linearly by an arbitrary reciprocating mechanism, and the reciprocating rotation is not limited to the illustrated operating mechanism, and any other arbitrary Can be reciprocally rotated using the actuating mechanism. In short, any structure may be used as long as the hook 4 can be reciprocally rotated.

Next, a pseudo double chain stitch structure formed by the sewing machine will be described. The seam structure shown in FIGS. 5 to 14 shows a seam structure formed by using three needles 19a, 19b, and 19c without using an upper decorative thread. The first line formed by the right end needle 19a is shown in FIG. That is, the second row formed by the needle thread stitch 23a at one end of the right end and the middle needle 19b, that is, the third row formed by the middle row needle thread stitch 23b and the left end needle 19c, Three rows of parallel needle thread stitches 23a, 23b, 23c formed of the needle thread stitches 23c at the other end of the left end, and an underlay joined to the needle thread stitches 23a, 23b, 23c of each row on the back of the fabric It is composed of a thread 20. For details of each row needle thread stitches 23a, 23b, of 23c, the needle 19a, 19b, the needle thread loop _24a n are simultaneously formed on the n-th through the lower end of the _19c, 24b n, in 24c _n, each needle thread loop 24a _{n, 24b} n, the needle thread loop 20 _n under cover thread 20 is passed by looping the 24c _n after exiting the needle thread loop 24c _n of the third row, which is formed in the following the same third row It is hung only on the loop, that is, the needle thread loop 24c _{n + 1} formed in the (n + 1) th, and is not hung on the needle thread loop formed in the (n + 1) th row in the first and second rows. The lower cover thread 20 leaving the needle thread loop 24a _n of one end of the column is a first column is divided into front and rear, so as to communicate with looping to each needle thread loop 24a _n-1 and 24a n + ₁ before and after Yes.

Next, a method for forming the stitch structure will be described in the order of FIGS. In the figure, arrow F indicates the cloth feeding direction.
As shown in FIG. 5, the right needle 19a carrying the needle thread 21a, the middle needle 19b carrying the needle thread 21b, and the left needle 19c carrying the needle thread 21c are lowered and located at the bottom dead center. When each of the needles 19a, 19b, 19c is raised from the state in which the looper 3 carrying 20 is located at the right dead center and the looper 3 moves forward (forward movement) in the figure, the tip of the looper is first formed by the right needle 19a. The loop 22a of the needle thread 21a to be used is combed (FIG. 6). When the needles 19a, 19b, 19c are further raised and the looper 3 moves forward, the looper 3 passes through the loop 22a of the needle thread 21a together with the underlay thread 20, and the needle thread 21b of which the looper tip is formed by the middle needle 19b. Loop 22b is sown (FIG. 7).

  When the needles 19a, 19b, 19c are further raised and the looper 3 advances, the looper 3 passes through the loop 22a of the needle thread 21a and the loop 22b of the needle thread 21b together with the underlay thread 20, and the tip of the looper is formed by the left needle 19c. The loop 22c of the needle thread 21c to be used is combed (FIG. 8).

  When the needles 19a, 19b, 19c continue to rise further and the looper tip passes through the loop 22c of the needle thread 21c together with the underlay thread 20, the hook 4 that reciprocates in the horizontal plane moves forward in the cloth feed direction. (Advance) (FIG. 9). When each needle 19a, 19b, 19c reaches the top dead center and the looper 3 reaches the left dead center, the ridge groove 4a at the hook tip passes through the loop 22a, 22b, 22c of the needle yarn and the lower decorative yarn 20 is passed through the looper tip. Is captured between the eye hole 3a and the loop 22c and pushed forward in the cloth feeding direction (FIG. 10).

When the needles 19a, 19b, 19c are lowered from the top dead center, the looper 3 is retracted from the left dead center, and the hook 4 continues to move forward while the lower thread 20 is captured in the heel groove 4a, the needle thread 21c The underlay yarn 20 that has exited the loop 22c spreads toward the front side in the cloth feeding direction F from the looper 3 to form a tip loop 20Ln _{+ 1} , and the left needle 19c descending into the loop enters. Then, the middle needle 19b and the right needle 19a are lowered to the front side of the lower decoration thread 20 reaching the loop 22a of the needle thread stitch formed immediately before the looper 3 and the eye hole 3a of the looper 3 (FIG. 11). FIG. 12 shows a state in which each needle 19a, 19b, 19c is further lowered, the looper 3 continues to move backward, and the hook 4 continues to move forward in the cloth feeding direction.

  When the needles 19a, 19b, 19c continue to descend and the hook 4 moves backwards and retracts, the tip of the looper 3 that continues to retract moves away from the looper 22c of the needle thread 21c (FIG. 13).

FIG. 14 shows a state in which the needles 19a, 19b, 19c are further lowered, the hook 4 is retracted and separated from the loop 20a, and the looper 3 is retracted and separated from the loop 22b of the needle thread 21b. In this state, the loop 20L _{n + 1} of the lower decoration thread 20 is hooked on the left needle 19c, and the looper tip is hooked on the loop 22a of the needle thread 21a. Thereafter, the seam forming process shown in FIG. 5 and thereafter is repeated.

  The seam structure of the present embodiment is similar to the conventional double ring lower ornament seam structure, but the lower stitch thread 20 has a needle thread 21a, 21b, 21c compared to the conventional double ring lower ornament seam structure. Looped through the loop, one side of which is passed through the loop 22a, 22b, 22c without being zigzag into the needle thread loop formed next to each row, and formed by the middle needle 19b. The needle thread stitch loop 22 b is not connected to the needle thread stitch loop formed immediately before by the underlay yarn 20, and the loop 22 is formed with the loop 22 formed immediately before and one underlay yarn 20. Since the connecting structure between the front and rear loops by the underlay yarn 20 is weak, the seam easily expands and contracts in the front-rear direction in the cloth feeding direction.

  The above-described embodiment has shown a stitch structure formed using a sewing machine having the same appearance as a three-needle flat stitch sewing machine, but other multi-needle sewing machines, for example, a two-needle sewing machine or a four-needle sewing machine. Can be used to form a similar double double stitch with two or four needle threads, and even if a multi-needle double ring stitch sewing machine is used, a pseudo double ring stitch having the same structure can be formed. Furthermore, it is also possible to use an upper garment thread to form a quasi-flat seam in which the lower garment thread is combined with the needle thread as shown in the previous embodiment.

  In the flat stitch sewing machine and the double chain stitch sewing machine, the spreader 1 and the looper 3 reciprocate from left to right in the opposite direction to the sewing machine, and the structure is referred to as a left sewing machine that forms a right-and-left object shape. There is also a sewing machine. The present invention is also applicable to such a left sewing machine, and the stitch formed by the left sewing machine is such that the loop at the tip of the underlay yarn 28 is hung on the loop 22a of the needle thread 21a, and the loops before and after the needle thread 21c. Reference numeral 22 denotes a form connected by a single underlay yarn 20.

1. · Spreader 2 · · Cylinder bed 3 · Looper 4 · Hook 6 · · Lower shaft 19a, 19b, 19c · · Needle 20 · · Underlay yarn 21a, 21b, 21c · · Needle yarn

Claims (2)

Are formed through the dough, and the needle thread stitch row on one end, parallel to the needle thread stitching multiple rows containing the needle thread stitch row of the other end, in the fabric back surface, the needle thread of each column of the plurality of rows consists lower fancy yarn coupled to stitch, the other end in a state lower fancy yarn is obtained by looping the needle thread loop formed in the n-th columns to the needle thread stitching the other end from the needle thread stitches of said one end pseudo double chain stitch structure having a lower twist yarn loops forming the n-th to only looped around the needle thread loop formed in the n + 1 th column. A sewing machine for forming a pseudo double chain stitch structure according to claim 1, comprising a plurality of needles that carry needle threads, are arranged in parallel in a direction perpendicular to the cloth feed, and move up and down in conjunction with the main shaft, It carries a decorative thread, performs only reciprocation in the direction in which the needles are arranged in synchronization with the vertical movement of the needle, and scoops the needle thread loop formed by the needle that rises from the bottom dead center during forward movement, and the needle during backward movement A looper that separates from the thread loop and reciprocates in conjunction with the main shaft, and in the forward movement, it engages with the underliner thread at the end of the looper that passes through the needle thread loop of each needle and protrudes toward the front of the cloth feed direction. for the next stitch forming pushed open, out of the plurality of needles to be lowered, multi present needle sewing machine consisting of a hook for forming a loop in which only needle of the other end enters.