JP2016168190A - Sewing product and fabric sewing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sewn product whose fabric edges are sewn together and a sewing method of the sewn product, which can reduce the thickness, rough feeling and hardness of sewn parts of two pieces of fabrics such as a fastener tape and a body clothing fabric which are different in thickness, and can finely finish the product with being less conspicuous of the sewn part and of securing sufficient strength.SOLUTION: A sewn product 10 comprises a tape end 12A of a faster tape 12 and a fabric end 14A of a body clothing fabric 14 which is thicker than the faster tape 12 that are put together and sewn up, and comprises: one bobbin thread 20; and two needle threads 16 and 18 both of which entangle with the bobbin thread 20 so as to form a plurality of line of zigzag seams, thereby sewing up the tape end 12A and the fabric end 14A together. The faster tape 12 and the body clothing fabric 14 are pressed with equal pressure and respectively sent by feed dogs 40a, 41a, 40b and 41b whose feed amount settings are different.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a sewn product and a sewing method for a fabric, and more particularly to a sewn product in which fabric ends having different thicknesses, for example, an end of a fastener tape and an end of a body fabric are sewn, and a sewing method thereof.

  When sewing the fastener tape for the slide fastener and the body cloth, in order to secure the strength of the stitched part, fold the body cloth after sewing the ground fabric with the body cloth overlaid on one end in the width direction of one side of the fastener tape. And further stitched. In general, the other side of the fastener tape is turned over, sewn together with the body cloth, folded back, and further stitched together with the body cloth. Therefore, the stitched portion is thick and hard. Further, since the fastener tape and the body cloth are partially overlapped and folded back, it is necessary to increase the dimensions of both the fastener tape and the body cloth. For example, the lateral width of the fastener tape needs to be set to 5 to 6 times the lateral width occupied by the element. Therefore, material costs for both the fastener tape and the body cloth are increased.

  As a sewing method for a fabric that is sewn without overlapping the fabric ends, a method of sewing with six threads using a four-needle or five-needle flat seamer sewing machine is known (see, for example, Patent Document 1). ). According to the stitching method using this flat seamer sewing machine, it is possible to reduce the unevenness of the stitched portion by stitching the fabric ends together, and stitch the fabric ends together with six threads. Thus, the strength of the stitched portion can be ensured. However, in the fabric sewing method using the flat seamer sewing machine, the ends of the fabric are stitched together with six threads, so that the thickness of the stitched portion increases depending on the thickness of the yarn, and the width of the stitched portion is wide. It stands out by that. Therefore, when sewing with the flat seamer sewing machine with the end of the fastener tape and the end of the body cloth joined together, the stitching width of the stitched part is widened and a feeling of looseness appears, and the perforation is complicated and elegant There is a problem that it is difficult to finish. Moreover, when sewing with a flat seamer sewing machine, the force to stop against the lateral load is weak and a gap is created between the fabrics. There are few.

  Japanese Patent No. 5341196 (Patent Document 2) discloses a technique for solving the problems of the sewing method using the flat seamer sewing machine. However, the patent document 2 does not describe a problem to solve a specific technical problem that occurs when fabrics having different thicknesses are sewed together. The present inventor has found a problem that when the end of the fastener tape and the end of the body cloth are put together and stitched using this technique, the fastener tape is finished in a wavy manner in the longitudinal direction. Furthermore, conventionally, as described above, it is common technical knowledge that the fasteners are sewn by overlapping, and it is not suggested in Patent Document 2 to sew by other sewing methods, and such an idea is disclosed. There is no prior art document.

JP 2000-197783 A Japanese Patent No. 5341961

  The present invention has been made in view of the above circumstances, and reduces the thickness, feeling of looseness, and hardness of stitched portions of two fabrics having different thicknesses, such as fastener tape and body fabric, and makes the stitched portions less noticeable. It is an object of the present invention to provide a sewn product in which fabric ends are sewn together and a sewing method thereof, which can be finished and can secure the strength of a sewn portion.

  Another object of the present invention is to provide a sewing product and a fabric sewing method capable of reducing the material cost of the fabric and simplifying the sewing process.

  Still another object of the present invention is to provide a fabric sewing method that can reduce or eliminate the wave of the fastener tape.

  In order to solve the above-described problems, a sewn product according to the present invention is a sewn product that is sewn in a state where the end of the first fabric and the end of the second fabric that is thicker than the first fabric are brought together. An end of the first fabric and an end of the second fabric by one lower thread and a plurality of upper threads that are entangled with the one lower thread and form a plurality of zigzag seams. Is stitched.

  In the sewn product, two rows of zigzag stitches are formed by the two upper threads, and the end of the first fabric is edged by one of the two upper threads and the lower thread, The end of the second fabric may be edged by the other upper thread of the book and the lower thread.

  In the sewing product, three rows of zigzag stitches are formed by the three upper threads, and one of the three upper threads is formed by an end of the first fabric and an end of the second fabric. The other two of the three upper threads are attached to the end of the first fabric or the end of the second fabric on both sides of the one upper thread. May be sewn.

  In the sewing product, the first fabric may be a fastener tape to which an element is attached.

  In the sewn product, the length in the width direction of the fastener tape (see T in FIG. 9) may be 2 to 4 times the length in the width direction of the element (see E in FIG. 9). In the conventional stitching of the fastener tape and the body cloth, it is necessary to partially overlap the two, and accordingly, the length in the width direction of the fastener tape needs to be increased. Therefore, the length in the width direction of the fastener tape needs to be set to 5 to 6 times the element width.

  The fabric sewing method according to the present invention is a fabric sewing method in which sewing is performed in a state where the end of the first fabric and the end of the second fabric thicker than the first fabric are brought together. One upper thread is entangled with one lower thread, and the plurality of upper threads are entangled so as to form a plurality of zigzag stitches, and the end of the first fabric and the end of the second fabric are It is characterized by stitching.

  In the cloth sewing method, a sewing machine including a vertical full rotary hook and a plurality of sewing needles arranged side by side in a direction perpendicular to the feeding direction of the first and second cloths and swinging in the direction is used. The end of the first fabric and the end of the second fabric may be stitched together.

  In the cloth sewing method, the first cloth and the second cloth may be fed with feed teeth having different feed amounts while pressing the first cloth and the second cloth with equal pressure.

  In the fabric sewing method, the feed amount feed amount setting for the second fabric may be larger than the feed dog feed amount setting for the first fabric.

In the cloth sewing method, the first cloth may be a fastener tape to which an element is attached.

  In the cloth sewing method, the length in the width direction of the fastener tape may be 2 to 4 times the length in the width direction of the element.

  According to the present invention, the thickness of the stitched portion of two fabrics with different thicknesses, such as a fastener tape and body fabric, the feeling of looseness, the hardness is reduced and the stitched portion is less noticeable, and can be finished neatly and elegantly. And the sewing product which can ensure the intensity | strength of a stitching | suture part and the fabric ends were sewn together, and its sewing method can be provided. Further, according to the present invention, it is possible to provide a sewing product and a cloth sewing method capable of reducing the material cost of the cloth and simplifying the sewing process. Furthermore, according to the present invention, it is possible to provide a fabric sewing method that can reduce or eliminate the wave of the fastener tape.

It is a top view which shows one surface of the sewing product which concerns on one Embodiment. It is a top view which shows the other surface of a sewing product. It is a sewing type | mold three-dimensional figure of a stitching | suture part. FIG. 4 is a sectional view taken along the line 4-4 in FIG. 1. It is an elevation which shows one Example of the sewing method of cloth. It is a perspective view which shows one Example of the sewing method of material | dough. It is a front view which shows the state currently sent with a feed dog, pressing down with a fastener tape and body cloth with the cloth presser of a sewing machine, and a fastener tape and body cloth are expressed with a section. It is a perspective view which shows the feed dog exposed on a throat plate. It is sectional drawing of a pair of right and left fastener tapes sewn on the body cloth. It is a top view which shows one surface of the sewing product which concerns on other embodiment. It is a top view which shows the other surface of a sewing product. It is a sewing type | mold three-dimensional figure of a stitching | suture part. It is 11-11 sectional drawing of FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view illustrating one surface of a sewn product 10 according to an embodiment, and FIG. 2 is a plan view illustrating the other surface of the sewn product 10. As shown in these drawings, the sewn product 10 includes an end (hereinafter also referred to as “tape end”) 12A of a fastener tape 12 as an example of a first fabric, and a second fabric that is thicker than the fastener tape 12. The body cloth 14 is sewn by stitching it with the end (hereinafter also referred to as “fabric edge”) 14 </ b> A without being overlapped. The fastener tape 12 is made of woven fabric or knitted fabric. The body cloth 14 is a cloth forming clothing, candy, etc., and is, for example, a felt cloth, a knit, a wool compression knit, a jersey, or the like, but is not limited thereto. The sewn product 10 is clothing, bags, etc. using a slide fastener (not shown).
In the present embodiment, the fastener tape 12 is thinner than the body cloth 14 (see FIG. 4 and the like), but the present invention is not limited to this, and the body cloth 14 may be thinner than the fastener tape 12.

  Two upper threads 16 and 18 and one lower thread 20 are used for stitching the tape end 12A and the fabric end 14A. In the following description, the surface of the sewing product 10 where the upper threads 16 and 18 are exposed as stitches is referred to as the front surface, and the surface of the sewing product 10 where the lower thread 20 is expressed as the seam is referred to as the back surface. An element 15 (see FIG. 7 and the like) is attached to the surface of the fastener tape 12.

  The two upper threads 16 and 18 are juxtaposed across the boundary line L where the tape end 12A and the fabric end 14A meet without overlapping, and the upper thread 16 has a zigzag seam on the front side of the tape end 12A. The upper thread 18 is formed with a zigzag seam on the front side of the fabric end 14A. The upper threads 16 and 18 are entangled with the lower thread 20 at the turning points 16A, 16B, 18A and 18B to form knots.

  The turning point 16A on the boundary line L side of the upper thread 16 and the turning point 18A on the boundary line L side of the upper thread 18 are both located on the boundary line L. Further, the turning points 16A and 18B are arranged in a direction orthogonal to the boundary line L (X direction in the drawing), the turning points 16B and 18A are also arranged in the X direction, and the interval L1 thereof is a predetermined value (for example, 2 .00 mm). Further, an X-direction interval L2 between the turning point 16A and the turning point 16B and an X-direction interval L3 between the turning point 18A and the turning point 18B are set to predetermined values (for example, 2.00 mm). Accordingly, the width L4 of the seam formed by the upper threads 16 and 18 is a predetermined value (for example, 4.00 mm).

  As shown in FIG. 2, the lower thread 20 extends in the direction of the boundary line L (the Y direction in the figure) on the back side of the tape end 12A and the fabric end 14A through the turning points 16A, 16B, 18A, 18B. ing. Here, when the lower thread 20 is traced in the Y direction, the lower thread 20 passes through the turning points in the order of 18B → 18A → 16B → 18A → 18B → 16A → 18B → (hereinafter, repeated).

  FIG. 3 is a sewing three-dimensional view of the stitched portion of the tape end 12A and the fabric end 14A. As shown in this figure, when the configuration of the lower thread 20 is traced in the Y direction, the lower thread 20 forms a knot with the upper thread 18 at the folding point 18B, and the upper thread 16 and the knot at the neighboring folding point 16A. Form. Then, the lower thread 20 forms a knot with the upper thread 18 at the folding point 18A via the folding point 18B, and forms a knot at the neighboring folding point 16B. Then, the lower thread 20 forms a knot with the upper thread 18 at the folding point 18B via the folding point 18A, and forms a knot at the neighboring folding point 16A. The above configuration is repeated.

  4 is a cross-sectional view taken along line 4-4 of FIG. As shown in this figure, the tape end 12A is edged by the upper thread 16 and the lower thread 20 between the turning points 16B-16A, and the fabric end 14A is connected with the upper thread 18 between the turning points 18B-18A. It is edged by the lower thread 20.

  Here, since the tension between the upper thread 16 and the lower thread 20 that are intertwined with each other and surround the tape end 12A acts to compress the tape end 12A, the density of the tape end 12A is increased. Further, since the tension between the upper thread 18 and the lower thread 20 that are intertwined with each other and surround the fabric end 14A acts to compress the fabric end 14A, the density of the fabric end 14A is increased.

  FIG. 5 is an elevation view showing an embodiment of a fabric sewing method, and FIG. 6 is a perspective view showing a fabric sewing method according to the embodiment. As shown in FIG. 5, the sewing machine used to sew the tape end 12A and the fabric end 14A is composed of two sewing needles 1 and 2, a vertical full rotary hook 4, and a needle plate disposed therebetween. 3. The two sewing needles 1 and 2 are arranged in parallel to the direction (left and right direction in the figure) perpendicular to the cloth feeding direction (from the front side to the back side in the figure). The moving mechanism swings in the left-right direction in the figure. An upper thread 16 is passed through the thread hole of the sewing needle 1, and an upper thread 18 is passed through the thread hole of the sewing needle 2.

  The vertical full rotary hook 4 is a hook that rotates in the counterclockwise direction in the figure around a rotation axis parallel to the feed direction of the fabric, and widens the loop of the bobbin around which the lower thread 20 is wound and the upper threads 16 and 18 It has a sword tip (both not shown). The needle plate 3 is formed with a hole through which the sewing needles 1 and 2 pass.

  The sewing machine used to sew the tape end 12A and the fabric end 14A is a fabric pressing device 30 (for pressing the fastener tape 12 and the body fabric 14 thicker than the fastener tape 12 against the needle plate 3 with equal pressure. 7) and a fabric feed mechanism including feed teeth 40a, 41a, 40b, 41b (see FIG. 8 and the like) for feeding the fastener tape 12 and the body fabric 14 at different feed amounts. A procedure for sewing the tape end 12A and the fabric end 14A using the sewing machine having the above-described configuration will be described. The fabric pressing device 30 and the fabric feed mechanism including the feed teeth 40a, 41a, 40b, and 41b are described below. It will be described later. As shown in FIG. 6, the sewing needles 1 and 2 through which the upper threads 16 and 18 are passed through the thread holes are passed through the folding points 16B and 18A, respectively, and the vertical full rotary hook 4 is pulled up while raising the sewing needles 1 and 2. Rotate. At this time, the loop of the upper threads 16 and 18 is widened by the sword of the vertical full rotary hook 4, the lower thread 20 is passed through the loop, and the upper threads 16 and 18 are pulled up in this state. As a result, the upper thread 16 and the lower thread 20 form a knot at the turning point 16B, and the upper thread 18 and the lower thread 20 form a knot at the turning point 18A.

  Next, the fastener tape 12 and the body cloth 14 are fed in the Y direction, and the sewing needles 1 and 2 are swung in the right direction in the drawing so as to penetrate the folding points 16A and 18B, respectively. Then, the vertical full rotary hook 4 is rotated while raising the sewing needles 1 and 2. As a result, the upper thread 16 and the lower thread 20 form a knot at the turning point 16A, and the upper thread 18 and the lower thread 20 form a knot at the turning point 18B.

  Next, the fastener tape 12 and the body cloth 14 are fed in the Y direction, and the sewing needles 1 and 2 are swung in the left direction in the figure to penetrate the folding points 16B and 18A, respectively. Then, the vertical full rotary hook 4 is rotated while raising the sewing needles 1 and 2. As a result, the upper thread 16 and the lower thread 20 form a knot at the turning point 16B, and the upper thread 18 and the lower thread 20 form a knot at the turning point 18A. By repeating the above procedure, the tape end 12A and the fabric end 14A are stitched in two rows of staggered stitches while being edged by the upper threads 16, 18 and the lower thread 20.

  As described above, the stitched portion of the sewn product 10 in which the tape end 12A and the fabric end 14A are stitched by two rows of staggered stitches with two upper threads 16, 18 and one lower thread 20 is two upper threads. Since the density of the tape end 12A and the fabric end 14A is increased by the tension of the yarns 16, 18 and one lower yarn 20, sufficient tensile strength is obtained.

  In addition, since there are only three threads for stitching the tape end 12A and the fabric end 14A, the thickness of the stitched portion can be suppressed as compared with a stitched portion using six threads using a flat seamer sewing machine. It is possible to suppress unevenness and rough feeling of the part, and make the stitched part less noticeable. In addition, the stitching width can be made narrower and the stitched portion can be made more inconspicuous as compared with a stitched portion made of six threads using a flat seamer sewing machine. Here, since the stitched portion can be made inconspicuous, the design can be improved when the sewn product 10 is a garment in which a seam such as a jacket is exposed.

  In the sewing product 10 according to the present embodiment, the tape end 12A is edged by the upper thread 16 and the lower thread 20, and the fabric end 14A is edged by the upper thread 18 and the lower thread 20, Fraying of the tape end 12A and the fabric end 14A can be prevented.

  At the time of stitching the tape end 12A and the fabric end 14A as described above, the fastener tape 12 and the body fabric 14 are pressed on the needle plate 3 by a fabric pressing device 30 (see FIG. 7) with an equal pressure. In addition, the feed of the fastener tape 12 and the body cloth 14 in the Y direction is arranged on the right side by the left feed teeth 40a and 41a and the right feed teeth 40b and 41b (see FIGS. 7 and 8) of the cloth feed mechanism. The feed amount of the body cloth 14 to be set is set to be slightly larger than the feed amount of the fastener tape 12 arranged on the left side. The reason for performing such control is as follows. Since the body cloth 14 is thicker than the fastener tape 12, the thin fastener tape 12 cannot be firmly pressed by the sewing machine foot when it is sewn with a normal sewing machine foot. When sewing is performed in such a state, since the sewing machine is intermittently fed, the pressure for pressing the cloth also changes, resulting in uneven feeding and poor pitch. In order to avoid this, first, in order to apply the same pressing pressure even if the thicknesses of the fastener tape 12 and the body cloth 14 are different, the cloth is removed with a sewing machine foot having a seesaw function like the cloth pressing device 30. I tried to hold it down. However, the present inventor has found that when the fastener tape 12 and the body cloth 14 are sewn with a uniform pressing pressure, a wrinkle that undulates in the longitudinal direction occurs on the fastener tape 12 side. Furthermore, the cause is that the body cloth 14 that is thicker than the fastener tape 12 is slightly stretched in the feeding direction when being pulled under the cloth pressing portion under uniform pressure, and the body cloth 14 that has been stretched after the stitching is sewn. I found out that it was to shrink. In order to avoid this, the feed amount on the side of the thicker fabric 14 under the uniform press is set slightly larger than that of the fastener tape 12.

  FIG. 7 is an explanatory front view showing a state where the fastener tape 12 and the body cloth 14 are pressed onto the needle plate 3 with equal pressure by the cloth pressing device 30 of the sewing machine. In this figure, reference numbers 40a and 41a are left feed dogs for feeding the fastener tape 12 in the feed direction (from the front to the back in FIG. 7), and reference numbers 40b and 41b are for feeding the body cloth 14. Right feed dog. The fastener tape 12 has an element 15 at the edge opposite to the edge that is sewn to the body cloth 14 in the width direction. The fabric pressing device 30 includes a device main body 31 and a pair of left and right fabric pressing portions 32a and 32b extending from the device main body 31 downward and forward (front side in FIG. 7). In this embodiment, the left fabric pressing portion 32 a presses the fastener tape 12, and the right fabric pressing portion 32 b presses the body fabric 14. In the apparatus main body 31, when one of the fabric pressing portions 32a and 32b is raised, the other is lowered, so that the pressing pressure of the fabrics having different thicknesses by the fabric pressing portions 32a and 32b can be made the same. Built-in mechanism (seesaw function). Such an interlocking mechanism is disclosed in, for example, Japanese Patent Publication No. 56-17112. By this interlocking mechanism, the fastener tape 12 and the body cloth 14 are pressed with a uniform pressure on the needle plate 3 from the cloth pressing portions 32a and 32b.

  FIG. 8 shows the left feed dogs 40a and 41a and the right feed lines 40b and 41b exposed upward from the opening of the needle plate 3 incorporated in the table (not shown) of the sewing machine. These feed dogs 40a, 41a, 40b, 41b are also represented in FIG. The feed dogs 41a and 41b are divided forward and backward in the feed direction across the needle hole. In the present embodiment, the left feed dogs 40 a and 41 a are for feeding the fastener tape 12, and the right feed dogs 40 b and 41 b are for feeding the body cloth 14. Further, the right feed dogs 40b and 41b are set so that the feed amount is slightly larger than that of the left feed dogs 40a and 41a. A technique that can independently set the feed amounts of the left and right feed dogs is disclosed in, for example, Japanese Patent Laid-Open No. 3-191984.

  As described above, by holding the fastener tape 12 and the body cloth 14 with equal pressure and increasing the feed amount on the thicker body cloth 14 side, one of the two is stretched or contracted too much with respect to the other. The tape end 12A and the fabric end 14A can be sewn together. Therefore, the zipper tape 12 can be prevented from wavy in the longitudinal direction. Further, it is not necessary to fold the body cloth 14 at the time of stitching, and further, there is no need to look back, so that the material cost of the fastener tape 12 and the body cloth 14 can be suppressed, and the sewing process is simplified.

  FIG. 9 is a partial cross-sectional explanatory view showing a pair of left and right fastener tapes 12 stitched to the body cloth 14. In the present invention, the tape end 12A and the fabric end 14A are stitched together without overlapping. Therefore, the length in the width direction of the fastener tape 12 can be made shorter than before, and the material cost can be reduced accordingly. More specifically, the width direction length (T) of the left and right fastener tapes 12 in the state where the element 15 is closed is determined so that the left and right elements 15 in the meshed state are in consideration of overlapping with the body cloth 14. It was necessary to set to 5 to 6 times the length in the width direction (E). On the other hand, in the present invention, the width direction length T of the left and right fastener tapes 12 in the closed state can be suppressed to 2 to 4 times the width direction length E of the left and right elements 15. Usually, when the fastener tapes are overlapped and sewn, the fastener tape portion is often sewn by pressing the fastener tape portion with a 4 mm wide sewing foot for a fastener having an element width direction length (E) of 5 mm to 6 mm. In this case, the length (T) in the width direction of the fastener tape exposed after sewing is 5 mm to 6 mm + 4 mm + 4 mm, 13 mm to 14 mm, which is a standard product form familiar to current consumers. It can be said that it is a product form that looks good for consumers. From the standpoint of providing a sewing product that meets such consumer needs, the width direction length T of the left and right fastener tapes 12 in the closed state is also the width length of the left and right elements 15 in the present invention. 2.33 to 2.60 times E (14/6 to 13/5) can be said to be the most preferable range, but in actuality, considering the error width on the sewing product processing and the impression of visual appearance, It can be said that 2 to 3 times is a preferable range. However, on the other hand, when mass production of fasteners is performed with an existing automatic manufacturing machine, it is necessary to hold the fastener tape with the gripper of the automatic manufacturing machine and transport it between each manufacturing process. For this reason, there is a situation that the width of the fastener tape that can be held by the gripper is required. Under this technical restriction, the widthwise length T of the left and right fastener tapes 12 in the closed state is the width of the left and right elements 15. It has been found that at least four times the direction length E is required. For this reason, when the fastener is mass-produced with an existing automatic manufacturing machine and the exposed width of the fastener is to be reduced as much as possible, the upper limit is 4 times.

  FIG. 10 is a plan view showing one surface of a sewn product 100 according to another embodiment, and FIG. 11 is a plan view showing the other surface of the sewn product 100. As shown in these drawings, three upper threads 16, 18, 22 and one lower thread 20 are used for stitching the tape end 12A and the fabric end 14A. Also in this embodiment, the above-described equal pressing with respect to the fastener tape 12 and the body cloth 14 and an increase in the feed amount on the body cloth 14 side are employed.

  The two upper threads 16, 18 are juxtaposed across a boundary line L where the tape end 12A and the fabric end 14A are brought together, and the upper thread 16 forms a zigzag seam on the front side of the tape end 12A, The upper thread 18 forms a zigzag seam on the front side of the fabric end 14A. Further, the upper thread 22 straddles the boundary line L and forms a zigzag seam on the front side of the tape end 12A and the fabric end 14A. The upper threads 16, 18, and 22 are entangled with the lower threads 20 at the turning points 16 </ b> A, 16 </ b> B, 18 </ b> A, 18 </ b> B, 22 </ b> A, and 22 </ b> B to form knots.

  The turning points 22A and 22B of the upper thread 22 are located on the tape end 12A and the fabric end 14A, respectively. The turning points 16A, 22B, and 18B are arranged in a direction orthogonal to the boundary line (X direction in the figure), and the turning points 16B, 22A, and 18A are arranged in the X direction.

  As shown in FIG. 11, the lower thread 20 passes through the turn points 16A, 16B, 18A, 18B, 22A, 22B on the back side of the tape end 12A and the fabric end 14A, and the direction of the boundary line L (Y in the figure). Direction). Here, when the lower thread 20 is traced in the Y direction, the lower thread 20 has each turning point of 18B → 18A → 22B → 16B → 22B → 18A → 18B → 22A → 16A → 22A → 18B (hereinafter repeated). Go through in order.

  FIG. 12 is a sewing three-dimensional view of the stitched portion of the tape end 12A and the fabric end 14A. As shown in this figure, when the configuration of the lower thread 20 is traced in the Y direction, the lower thread 20 forms a knot with the upper thread 18 at the turning point 18B, and the upper thread 22 and the knot at the next turning point 22B. Form. The lower thread 20 forms a knot with the upper thread 16 at the turning point 16A, and forms a knot with the upper thread 18 at the turning point 18A via the turning points 22B and 18B. The lower thread 20 forms a knot with the upper thread 22 at the turning point 22A, and forms a knot with the upper thread 16 at the turning point 16B. Then, the lower thread 20 forms a knot with the upper thread 18 at the turning point 18B via the turning points 22A and 18A. The above configuration is repeated.

  13 is a cross-sectional view taken along the line 11-11 in FIG. As shown in this figure, the upper thread 22 and the lower thread 20 that are intertwined with each other surround the tape end 12A and the fabric end 14A across the boundary line L, and the upper thread 16 and the lower thread 20 that are intertwined with each other on one side are An upper thread 18 and a lower thread 20 that surround the tape end 12A and are intertwined with each other surround the fabric end 14A.

  Here, the tension between the upper thread 22 and the lower thread 20 acts so as to compress the portion surrounded by the upper thread 22 and the lower thread 20 of the tape end 12A and the fabric end 14A. Thereby, the density of the said site | part of 12 A of tape ends and the fabric end 14A increases. Further, the tension between the upper thread 16 and the lower thread 20 acts so as to compress the portion surrounded by the upper thread 16 and the lower thread 20 of the tape end 12A. Thereby, the density of the said site | part of 12 A of tape ends increases. Further, the tension between the upper thread 18 and the lower thread 20 acts so as to compress the part surrounded by the upper thread 18 and the lower thread 20 of the fabric end 14A. Thereby, the density of the said site | part of the fabric edge 14A increases.

  That is, the stitched portion of the sewn product 100 according to the present embodiment is compressed by the three upper threads 16, 18, 22 and the one lower thread 20 at the center in the width direction and at three locations on both sides thereof, and the density is reduced. Since it is raised, the tensile strength of the stitched portion can be further increased as compared with the sewn product 10 according to the above-described embodiment. The sewn product 100 may be sewn in the same manner as the sewn product 10 described above with three sewing needles.

  As mentioned above, although the form for implementing this invention was demonstrated, the said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. The present invention can be changed and improved without departing from the gist thereof, and equivalents thereof are also included in the present invention. For example, in the above embodiment, the tape end 12 </ b> A and the fabric end 14 </ b> A of the body cloth 14 thicker than the fastener tape 12 and the fastener tape 12 are stitched, but the body cloth 14 may be thinner than the fastener tape 12. In this case, the feed amount on the side of the fastener tape 12 is slightly increased under a uniform pressing force. Further, in the sewn product 10 according to the above-described embodiment, the turning points 16A and 18A are disposed on the boundary line L between the tape end 12A and the fabric end 14A, but may be disposed on the tape end 12A or the fabric end 14A. Good.

1, 2 Sewing needle 3 Needle plate 4 Vertical full rotation hook 10 Sewing product 12 Fastener tape 12A Tape end 14 Fabric 14A Fabric end 15 Element 16 Upper thread 16A, 16B Folding point 18 Upper thread 18A, 18B Folding point 20 Lower thread 22 Upper Thread 22A, 22B Turn-back point 30 Material pressing device 32a, 32b Material pressing part 40a, 41a, 40a, 41b Feed dog 100 Sewing product

Claims (11)

A sewn product that is sewn in a state in which the end of the first fabric and the end of the second fabric that is thicker than the first fabric are brought together,
The end of the first fabric and the end of the second fabric are sewn together by one lower thread and a plurality of upper threads that form a plurality of rows of zigzag seams around the one lower thread. Sewing product characterized by being. Two rows of zigzag seams are formed by the two upper threads,
The end of the first fabric is edged by one of the two upper threads and the lower thread, and the end of the second fabric is edged by the other of the two upper threads and the lower thread. The sewn product according to claim 1, wherein the sewn product is formed. Three zigzag seams are formed by the three upper threads,
One of the three upper threads is sewn alternately to the end of the first fabric and the end of the second fabric, and the other two of the three upper threads are The sewn product according to claim 1, wherein the sewn product is sewn to an end of the first fabric or an end of the second fabric on both sides of the one upper thread.   The sewing product according to claim 1, wherein the first fabric is a fastener tape to which an element is attached.   The length of the width direction of the said fastener tape is 2 to 4 times the length of the width direction of the said element, The sewing product of Claim 4 characterized by the above-mentioned. A sewing method for a fabric that is sewn in a state in which an end of a first fabric and an end of a second fabric that is thicker than the first fabric are brought together,
A plurality of upper threads are entangled with one lower thread so that the plurality of upper threads form a plurality of zigzag seams, and an end of the first fabric and an end of the second fabric A method for sewing fabrics, characterized in that:   Using a sewing machine comprising a vertical full rotary hook and a plurality of sewing needles arranged side by side in a direction perpendicular to the feeding direction of the first and second fabrics and swinging in that direction, The fabric sewing method according to claim 6, wherein an end and the end of the second fabric are stitched together.   The cloth sewing method according to claim 6, wherein the first cloth and the second cloth are respectively fed by feed teeth having different feed amount settings while being pressed with equal pressure.   9. The cloth sewing method according to claim 8, wherein the feed dog feed amount setting for the second fabric is set larger than the feed dog feed amount setting for the first fabric.   The method for sewing fabric according to claim 6, wherein the first fabric is a fastener tape to which an element is attached.   The length of the width direction of the said fastener tape is 2 to 4 times the length of the width direction of the said element, The sewing method of the cloth | fabric of Claim 10 characterized by the above-mentioned.