JP4736095B2 - Sewing product and sewing machine jig for sewing - Google Patents

Description

  In the present invention, a slide fastener is sewn to the edge of a woven fabric, knitted fabric, non-woven fabric, natural leather, artificial leather, synthetic leather, plastic sheet or the like (hereinafter collectively referred to as “sewing fabric”), and the sewing fabric and sewing are performed. Sewing products finished by closing the fabric via a slide fastener, and a sewing machine jig that sews the slide fastener to the edge of the sewing fabric. More specifically, the slide fastener is sewn at the point of operation of the sewing needle. The present invention relates to a pressing piece for pressing a cloth and a fastener holder for guiding a slide fastener to the pressing piece.

  The ordinary slide fastener 10 has a structure in which a meshing element 23 faces outward and a stringer 26 called “musi” is fixed along a side edge of a base tape 28 (see FIG. 1). Unlike the ordinary slide fastener 10, the side edge of the base tape 28 that locks the stringer 26 is folded and doubled, and the stringer 26 is fixed to the folded base tape of the folded base tape. The engagement element 23 protrudes from the stringer 26 toward the outside from the fold 33 of the base tape folding allowance, and the stringer 26 is covered under the base tape 28 on one side of the fold 33 so as not to be exposed (see FIG. 2). ) Is known (see, for example, Patent Documents 1, 2, and 3).

JP 2003-180411 A JP 2003-210212 A JP 2004-195046 A

  A seam allowance 34 is provided at the edge portion of the sewing fabric, the seam allowance 34 is folded back, a fold end edge 72 formed along the fold 71 is aligned parallel to the stringer 26, and the seam allowance 34 is overlapped on the base tape 28. At the same time, the slide fastener 25 is sewn to the sewing fabric 27 by the perforated thread 35.

  In the ordinary slide fastener 10, when the width of the seam allowance 34 is set wide and the seam allowance 34 protrudes from the perforated thread 35 so that the folding end edge 72 overlaps the meshing element 23, The stringer 26 can be obscured by the seam allowance 34 (see FIG. 1).

  The slide fastener can be sewn to the sewing fabric 27 having the folded end edge 72 bent (see FIGS. 3 and 4). However, in the case where the folding end edges 72a and 72b of the pair of sewing fabrics 27a and 27b are abutted and are in close contact with each other, the pair of sewing fabrics 27a and 27b are closed via a slide fastener. I can't.

The reason is as follows.
That is, the sewing thread 35a, 35b for sewing the slide fasteners 25a, 25b and the sewing fabric 27a, 27b is sewn into a part away from the stringers 26a, 26b so that the sewing needle does not hit the stringers 26a, 26b. Yes. When the folding end edges 72a and 72b of the pair of sewing fabrics 27a and 27b have the same asymmetrical curved shape, the curvature radius Ra from the curvature center 73 of the curve to the perforated thread 35a of one sewing fabric 27a. And a slide fastener 25a sewn to one sewing fabric 27a and a slide fastener sewn to the other sewing fabric 27b due to a difference ΔR between the curvature radius Rb reaching the perforation line 35b of the other sewing fabric 27b. A difference in length of 25b occurs. This is because the engagement elements are not engaged with each other due to the difference in the length of the slide fastener (see FIG. 5).

  In addition, when the folding end edges 72a and 72b of the pair of sewing fabrics 27a and 27b have the same symmetrical curved shape that cannot be abutted with each other, the slide fasteners 25a and 25a that are sewn to the sewing fabrics 27a and 27b Since the length of 25b becomes the same, even if the closing location 36 is raised or recessed, these engaging elements can be engaged (see FIGS. 3 and 4).

  For this reason, the slide fastener is used only when the pair of sewing fabrics 27a and 27b in which the folding end edges 72a and 72b are symmetrical and have the same curved shape or linear shape are closed.

  However, the closed portions 36 of the pair of sewing fabrics 27a and 27b in which the folding end edges 72a and 72b form a symmetric shape are straight, do not exhibit a special aesthetic appearance, and do not become a design element of the design of the sewing product. On the contrary, it becomes an obstacle in designing the design of sewing products.

  Therefore, the present invention aims to close a pair of sewing fabrics 27a and 27b whose folding end edges 72a and 72b form an asymmetric curve shape with a slide fastener, and to enhance the beauty of the sewn product by the curved shape of the closed portion. And

The sewing product according to the present invention includes: (1) a pair of sewing fabrics 27a and a sewing fabric 27b in which the slide fastener 25 is sewn along a crease 71 formed by folding back the seam allowance 34 in parallel to the edge of the sewing fabric. (2) The base tape 28 of the slide fastener 25 is folded back at the junction with the stringer 26, and the stringer 26 and the base tape 28 are overlapped with each other. , (3)
The meshing element 23 protrudes from the front end of the stringer 26 toward the outside of the fold line 33 of the base tape 28. (4) Between the stringer 26 and the sewing cloth 27, the base tape 28 and the sewing allowance 34 of the sewing cloth overlap. The base tape fold line 33 and the fold line 71 of the seam allowance of the sewing fabric overlap each other, and (5) a fold edge 72a formed by the seam fold 71a of the pair of one sewn fabric 27a; The folding end edge 72b formed by the fold line 71b of the seam allowance of the other sewing fabric 27b forms an asymmetrical identical curved shape that comes into close contact with each other, and (6) a pair of closed via a slide fastener In the closed portion 36 of the sewing fabric 27a and the sewing fabric 27b, one of the sewing fabrics 27a having the same curved shape is depressed. And the edge 72a, protruding folding edge 72b of the other sewing cloth 27b has become face-to-face, the folding edge of the sewing fabric that forms the (7) to (27a · 27b) (72a · 72b) (8) The total length of the two slide fasteners (25a, 25b) that are closed at the closing portion 36 of the pair of sewing fabrics 27a and 27b. It is characterized by being equal .

  A second feature of the sewn product according to the present invention is that, in addition to the first feature, the folding end edges 72a and 72b of the pair of sewn fabrics 27a and 27b have at least one inflection point 70. This is in the shape of the shape.

  In the fastener holder according to the present invention, a slide fastener in which the base tape is folded at the boundary between the stringer and the stringer and the stringer and the base tape are overlapped, and the fold 33 of the base tape is used as the fold 71 of the seam allowance of the sewing fabric. This is a jig for guiding the slide fastener to the working position of the sewing needle in the sewing machine in order to overlap and sew to the seam allowance 34 of the sewing fabric. (1) Continuous from the back surface 21 toward the front surface 20; A downward vertical groove 13 having a bottom surface 11 serving as an opening 12 and a horizontal groove 14 having an opening 18 formed in a direction crossing the vertical groove are provided, and a gap between the horizontal groove opening 18 and the vertical groove opening 12 is provided. The tape holder 15 that is opened and continuing, (2) the abutment 16 that supports the tape holder 15, and (3) the opening 18 of the lateral groove. And a lid 17 that opens and closes the opening 12 of the downward vertical groove, and (4) the sewing fabric 27 is placed below the bottom surface 11 of the tape holder and between the back side 21 and the front side 20 of the tape holder. The first feature is that an open space 19 that can pass through is provided.

  The second feature of the fastener holder according to the present invention is that, in addition to the first feature, the abutment 16 is movably received by the base plate 22.

  The pressing piece according to the present invention is a slide fastener in which the base tape is folded back at the joint portion with the stringer, the slide fastener in which the stringer and the base tape overlap, the fold 33 of the base tape, and the fold 71 of the seam allowance of the sewing fabric. This is a jig for holding the sewing fabric at the working position of the sewing needle of the sewing machine in order to sew on the sewing allowance 34 of the sewing fabric, and (1) The stringer of the slide fastener is fitted and fitted. A guide groove 32 for guiding the stringer in the direction in which the sewing fabric passes is provided on the bottom surface 50. (2) The groove width m of the groove inlet 51 of the guide groove is between the groove inlet 51 and the groove outlet 52 of the guide groove. The first feature is that the intermediate portion 53 is wider than the groove width w.

  The second feature of the pressing piece according to the present invention is that, in addition to the first feature, (1) a through hole 54 through which the sewing needle passes is formed in the intermediate portion 53 of the guide groove, and (2) The groove walls 56 and 57 of the guide groove facing each other at the intermediate portion 53 are inclined with respect to the bottom surface 50 of the pressing piece 31 in the direction in which the groove bottom 55 of the guide groove at the intermediate portion 53 is away from the through hole 54. There is in point.

In the slide fastener 25 used in the present invention, the base tape 28 is folded back at the junction with the stringer 26, the stringer 26 and the base tape 28 overlap each other, and the meshing element 23 extends from the tip of the stringer 26 to the base tape. It is a hidden slide fastener protruding toward the outside of the 28 fold lines 33 (see Patent Documents 1 to 3).
In the present invention, the stringer 26 and the sewing fabric 27 overlap each other, and are sewn by the base tape fold 33a of the sewing fabric 27a sewn by the sewing thread 35a, the seam allowance fold 71a of the sewing fabric, and the sewing thread 35b. The fold 33b of the base tape of the other sewn fabric 27b and the crease 71b of the seam allowance of the sewn fabric are brought into close contact with each other at the closing portions 36 of the slide fasteners 25a and 25b sewn to the sewn fabric 27a and 27b (see FIG. 7-4). ).

  Therefore, even when the folding end edges 72a and 72b of the pair of sewing fabrics 27a and 27b have the same asymmetrical curved shape, the radius of curvature from the center of curvature of the curved line to the perforated line 35a of one sewing fabric 27a. There is almost no difference ΔR between Ra and the radius of curvature Rb reaching the perforated line 35b of the other sewing fabric 27b (see FIG. 6).

In particular, when the curved shape of the folding end edges 72a and 72b of the pair of sewing fabrics 27a and 27b is inflected, the folding end edge 72a of the one sewn fabric 27a is formed on one side of the inflection point 70. Is longer than the folding edge 72b of the other sewing fabric 27b. On the opposite side of the inflection point 70, the folding edge 72a of the one sewing fabric 27a is the same as that of the other sewing fabric 27b. It becomes shorter than the folding edge 72b.
Accordingly, the slide fastener 25a sewn to one sewing fabric 27a and the slide fastener 25b sewn to the other sewing fabric 27b are aligned to the same length.
Then, a fold 71 of the seam allowance of the sewing fabric is generated along the perforated line 35, and the fold 71 becomes a folding end edge 72 of the sewing fabric, so that the meshing elements of the pair of slide fasteners 25a and 25b mesh.
For this reason, the folding end edges 72a and 72b of the pair of sewing fabrics 27a and 27b having the same asymmetrical curved shape are closed via the slide fasteners 25a and 25b.

At the closed portion 36, the folding end edges 72a and 72b of the pair of sewing fabrics 27a and 27b having the same asymmetrical curved shape are abutted.
Therefore, an asymmetrical concave groove having the same curved shape corresponding to the shape of the folding end edges 72a and 72b is drawn on the surface of the sewing fabric. The stringer 26 and the base tape 28 are not exposed at the groove bottom of the concave groove. Therefore, a required design can be expressed on the sewing product by the curve of the concave groove.

  In the fastener holder of the present invention, the lid 17 opens and closes the longitudinal groove opening 12 at a position away from the lateral groove opening 18. When the opening 12 of the vertical groove 13 is open, the base tape 28 can be freely fitted into the horizontal groove 14, and the stringer 26 is fitted into the vertical groove 13 when the base tape 28 is fitted into the horizontal groove 14. (See FIGS. 8 and 9-1). Then, the base tape 28 fitted in the horizontal groove 14 and the stringer 26 fitted in the vertical groove 13 are in an orthogonal state (see FIG. 9-2). That is, the stringer 26 rises perpendicularly to the side edge of the base tape 28 at the fold 33.

If the lid 17 is moved and the longitudinal groove opening 12 is closed while the base tape 28 and the stringer 26 are fitted, the lateral groove opening 18 is also blocked by the lid 17.
Accordingly, the state in which the stringer 26 stands up vertically along the side edge of the base tape 28 is maintained (see FIG. 9-2).

The slide fastener 25 is pulled out from the longitudinal groove 13 and the lateral groove 14 in a state where the stringer 26 rises perpendicularly to the side edge of the base tape 28 (see FIG. 9-3). Since the stringer 26 is pulled out in such a manner that the stringer 26 is raised, the guide groove 32 easily fits into the stringer 26 that rises perpendicularly to the side edge of the base tape 28.
When the pressing piece 31 is lowered, the base tape 28 is pressed against the sewing fabric 27.
Thus, the hidden slide fastener 25 is sewn to the sewing fabric 27 along the crease 33 between the base tape 28 and the stringer 26 (see FIG. 7).

  As described above, when the fastener holder of the present invention is used, the manual operation of fitting the stringer 26 into the guide groove 32 every time the sewing machine is applied again is omitted. For this reason, the sewing efficiency for sewing the hidden slide fastener 25 to the sewing fabric 27 is improved.

The opening angle (θ) between the raised stringer 26 and the base tape 28 does not need to be exactly 90 degrees. The opening angle (θ) may be such that the stringer 26 does not cover the sewing portion (35) between the sewing fabric 27 and the base tape 28 where the sewing needle 30 operates.
For this purpose, the crossing angle θ between the vertical groove 13 and the horizontal groove 14 is set to 90 degrees or more. By doing so, it is desirable that the opening angle (θ) between the stringer 26 and the base tape 28 is 90 degrees or more, preferably 120 degrees or more, according to the crossing angle θ.

  When the tape holder 15 is pin-joined to the abutment 16 via the pin 38 so as to be swingable in the vertical direction, when the tape holder 15 is raised with the pin 38 as the rotation axis (see FIG. 9-1), the bottom surface 11 Becomes a vertical surface, and the base tape 28 is dropped into the horizontal groove 14 when the vertical grooves and the lateral groove openings 12 and 18 are viewed from the front, and the hidden slide fastener 25 is locked to the tape holder 15. Since the stringer 26 is fitted into the vertical groove 13 in the locked state, the slide fastener can be efficiently inserted into the fastener holder.

  When the abutment 16 is movably received by the base plate 22, even if the edge 37 of the sewing fabric is bent, the tape is adjusted to the position of the edge 37 of the sewing fabric that is bent by moving the abutment 16. The holder 15 is moved, and the base tape 28 can be overlapped and stitched on the edge 37 of the bent sewing fabric (see FIG. 10). By doing so, it becomes possible to close the sewing fabric and the sewing fabric via the hidden slide fastener 25 and efficiently sew the sewing product.

The bottom surface 50 of the pressing piece 31 according to the present invention is provided with a guide groove 32 into which a stringer of a slide fastener is fitted and which guides the fitted stringer in a direction in which the sewing fabric passes.
The groove width m of the groove inlet 51 of the guide groove back and forth in the passing direction of the sewing fabric is wider than the groove width w at the intermediate portion 53 between the groove inlet 51 and the groove outlet 52 of the guide groove (see FIG. 11). ).
For this reason, when the base tape 28 is overlapped and stitched on the edge 37 of the bent sewing fabric, the tape holder 15 is moved so that the fold 33 at the boundary between the stringer 26 and the base tape 28 is moved to the position where the sewing needle 30 acts. (See FIG. 10).

  In particular, when the groove width n of the groove outlet 52 located on the opposite side of the groove inlet 51 is made larger than the groove width w in the intermediate portion 53 of the guide groove, like the groove width m of the groove inlet 51, the stringer 26 The groove walls 56 and 57 of the guide groove are in a point contact state. For this reason, it becomes easy to align the position of the fold 33 and the sewing needle 30 accurately.

  A through hole 54 through which the sewing needle 30 that goes up and down passes is formed in an intermediate portion 53 between the groove inlet 51 and the groove outlet 52, and the groove bottom 55 in the intermediate portion 53 is separated from the through hole 54. When the groove walls 56 and 57 of the opposing guide grooves are inclined with respect to the bottom surface 50 of the pressing piece 31 (see FIG. 12), the opening angle (θ = 180 ° −α) between the stringer 26 and the base tape 28 is 90. Therefore, the perforation 35 can be brought as close as possible to the stringer meshing element 23.

  The inclination angle (α) of the pressing piece 31 with respect to the bottom surface 50 of the guide groove 32 is set to 65 to 75 degrees, and the opening angle (θ) between the stringer 26 and the base tape 28 is 105 to 115 degrees (θ = 180 degrees − α) should be satisfied. The opening angle (β) between the groove walls (56, 57) facing each other at the groove inlet 51 and the groove outlet 52 of the guide groove may be set to 70 degrees or more (see FIG. 10).

FIG. 8 shows a specific example of the fastener holder. The tape holder 15 is pinned to the abutment 16 via a pin 38 so as to be swingable and tiltable, and protrudes vertically, and is cantilevered from the support leg 39. The arm 40 projecting horizontally in a beam shape is formed in an inverted L shape.
The arm 40 is provided with a downward vertical groove 13 which is continuous from the back surface 21 to the front surface 20 and whose bottom surface 11 becomes the opening 12, and a horizontal groove 14 in which an opening 18 is formed in a direction crossing the vertical groove. Yes. The space between the lateral groove opening 18 and the vertical groove opening 12 is opened.
The lower side of the bottom surface 11 of the arm 40 is a space 19 that is open to the extent that the sewing fabric 27 can pass from the back side 21 to the front side 22.

  On the upper surface of the arm 40, a dovetail groove 41 is provided in the length direction of the arm 40, and a slider 42 is fitted in the dovetail groove 41 so as to be slidable in the length direction. The front end of the slider is folded downward in a U shape, and the folded portion constitutes a lid 17 that slides on the bottom surface 11 of the arm 40 to open and close the opening 12 of the vertical groove. The longitudinal groove opening 12 is closed by the lid 17 moving toward the lateral groove opening 18. The lid 17 shown in FIG. 8 moves until its tip 43 abuts on the lower groove edge 44 of the lateral groove 14, and the lateral groove opening 18 is also closed by the moving lid 17. However, if the stringer 26 fits into the vertical groove 13 and is stably held, the lid 17 does not necessarily need to completely close the lateral groove opening 18. The means for closing the lateral groove opening 18 is not limited to the lid 17 shown in FIG.

A spring 45 with a tip 46 protruding downward is joined to the upper surface of the arm 40.
On the upper surface of the slider 42, there are provided two recesses 47 into which the protruding tip 46 is fitted. When the lid 17 is moved and the opening 12 is closed, the tip 46 of the spring is fitted in the recess 47 on the tip end side of the slider 42, and when the opening 12 is opened, the recess on the rear end side of the slider ( The tip 46 of the spring is fitted to (not shown). As a result, the closed state and the opened state of the opening 12 are set. A handle 49 for sliding the slider 42 in the length direction of the arm 40 is attached to the slider 42.

In the fastener holder shown in the figure, the pin 39 swings around the pin 38 and stops when the support leg 39 hits the abutment 16, the arm 40 stands still in a standing state, and the base tape 28 is fitted into the lateral groove 14 in the stationary state. The stringer 26 can be fitted into the longitudinal groove 13.
In the stationary state in which the arm 40 stands up, the lateral groove 14 is in the vertical direction, the vertical groove 13 is in the horizontal direction, and the bottom surface 11 of the arm is the side surface.

A dovetail groove 48 into which the base 22 is fitted is attached to the bottom surface of the base 16 so that the base 16 can be moved on the base 22 in the length direction of the arm 40. Yes.
The platform 22 can be placed on another platform so as to be movable, so that the tape holder 15 can be moved in a direction orthogonal to the length direction of the arm 40.
That is, the tape holder 15 can be moved vertically and horizontally.

  If the tape holder 15 can be moved vertically and horizontally, the hidden slide fastener 25 can be sent out from the tape holder 15 in accordance with the position of the end edge 37 of the bent sewing fabric, and the tape holder 15 and the sewing needle 30 You can also adjust the distance.

FIG. 7 shows a procedure for sewing the hidden slide fastener 25 to the sewing fabric 27.
The hidden slide fastener 25 shown in FIG. 7- (1) fits the base tape 28 into the lateral groove 14. Next, the stringer 26 is fitted into the longitudinal groove 13 and set in the fastener holder. Next, the stringer 26 is pulled out from the fastener holder to the working position of the sewing needle in a state where the stringer 26 rises about 90 degrees with the fold line 33 overlapping the base tape 28 as a boundary.
Then, the base tape 28 is pressed against the sewing allowance 34 of the sewing fabric 27 by the pressing piece 31. The base tape 28 is stitched to the sewing fabric 27 along the fold line 33 between the stringers 26 (see FIG. 7-2).

  The stringer 26 that has passed through the pressing piece 31 is laid down again and overlapped with the base tape 28, and the perforated line 35 is covered with the stringer 26 (see FIG. 7-3). Next, the sewing fabric 27 is folded back at the perforated line 35. The stringer 26, the base tape 28, the seam allowance 34, and the sewing fabric 27 overlap at the stitched portion. As a result, even if the engagement element 23 (stringer engagement end / element) slightly protrudes from the folds, the hidden slide fastener 25 is covered and hidden behind the sewing fabric 27 (see FIG. 7-4).

  When the slide fastener 25 is closed by engaging the engagement elements 23 (23) of the pair of sewing fabrics 27 and 27 to which the base tape has been sewn, the sewing fabric 27 and the sewing fabric 27 are attracted, and a stringer is placed behind the closing portion 36. 26 is obscured (see FIG. 7-5).

  Almost all fabrics constituting the sewn product may be sewn with a sewing thread, and the remaining part of the fabric may be closed with a slide fastener, and it is not necessary to close all the fabrics of the sewn product with a slide fastener.

FIG. 13 shows the seat cover attached to the seat body of the vehicle. The seat cover includes a back cover 77 and a seat cover 78. The back cover 77 has a back fabric (not shown) covering the back of the back body and a front fabric 79 covering the front of the back body in a bag shape via a side fabric 80 covering the side of the back body. It is constructed by stitching.
The side fabric 80 is composed of two sewing fabrics 27a and 27b elongated in the height direction of the backrest body. The facing edges of the two sewn fabrics 27a and 27b are folded seams, and slide fasteners are sewn to the sewn margins of the two sewn fabrics 27a and 27b.
The backrest cover 77 is attached to the backrest body by closing the side sewing fabric 27a and the side sewing fabric 27b via a slide fastener.
The seat cover 78 is configured by stitching the side fabric 82 along the periphery of the planar fabric 81 that covers the seat body. Similarly to the side cloth 80 of the back cover 77, the side cloth 82 is configured by closing two sewing cloths 27a and 27b elongated in the depth direction of the seat surface via a slide fastener.

The fold edge (72a) formed by the fold (71a) of the seam allowance of one sewn fabric (27a) forming a pair of the side fabrics 80 and 82, and the seam fold (71b) of the other sewn fabric (27b) The folding end edge (72b) formed by () forms an asymmetrical identical curved shape that comes into close contact when they are butted. Accordingly, when the sewing fabric 27a and the sewing fabric 27b are closed via the slide fastener, the folded portions of one sewing fabric and the folding end of the other sewing fabric are closed at the closed portions 36a and 36b. The protruding part of the edge will be abutted.
For this reason, an asymmetrical concave groove (36) having the same curved shape corresponding to the shape of the folded edge (72a, 72b) is drawn on each side surface of the back cover 77 and the seat cover 78. . In this case, the stringer (26) and the base tape (28) are in close contact with each other because the folding edges (72a, 72b) of the two sewing fabrics 27a, 27b forming a pair are in close contact with each other. It does not appear on the groove bottom of the groove 36b (see FIG. 7-5).

As shown in FIG. 13, the backrest body and the seat surface body have a three-dimensional shape with peripheral edges raised in a wave shape, the boundary between the side fabric 80 and the front fabric 79 of the backrest cover 77, and the seat surface cover 78. The border between the side fabric 82 and the flat fabric 81 is bordered curves 83 and 84 which are changed into wave shapes.
Therefore, the appearance of the closed portion 36a on the side surface of the back cover 77 is aesthetically integrated with the appearance of the backrest edge curve 83, and the appearance of the closed portion 36b on the side surface of the seat cover 78 is the seat surface edge curve. A new design that aesthetically integrates the appearance of 84 and feels soft as shown in FIG. 13 is depicted on the vehicle seat.

The curve formed in the closing part 36b of the side cloth 82 of the seat cover 78 is inflected at one place (70). The curve formed in the closing part 36a of the side surface 80 of the back cover 77 longer than the curved line is bent at two places (70a and 70b).
As described above, the number of inflection points 70 of the asymmetrical curve formed by the folding end edge (72) is increased in accordance with the length of the folding end edge (72) of the sewing fabric, and the closed portion 36 is closed. The total length of the slide fasteners (25a, 25b) of the strip is made equal.

The backrest cover 77 shown in FIG. 14 includes a center fabric 85 that covers the center portion of the backrest body, and left and right side fabrics 86 and 87 that cover the side portions thereof.
The center fabric 85 is sewn into one continuous fabric of a front fabric 79 that covers the front of the back body and a back fabric 88 that covers the noodles of the back body, and slides along the edges 72a and 72b. The fastener 25 is sewn.
The left and right side fabrics 86 and 87 are sewn into a bag shape by stitching the front fabric 79 and the back fabric 88 on the front and back of the side fabric 82, and the slide fastener 25 is sewn along the peripheral edge 89 of the opening. Yes.

  The edges 72a and 72b of the center fabric 85 and the peripheral edges 89 of the side fabrics 86 and 87 are asymmetric curves curved at four inflection points 70a, 70b, 70c, and 70d, respectively. The closed portion 36 a between the edge 72 a and the peripheral edge 89 of the left side fabric 86 and the closed location 36 b between the right edge 72 b of the center fabric 85 and the peripheral edge 89 of the right side fabric 87 are symmetrical to the front of the back cover 77. The geometrical pattern is drawn by the curve.

  As with the back cover 77, the seat cover 78 is also composed of a center fabric 85 that covers the central portion of the seat body and left and right side fabrics 86 and 87 that cover the side portions of the seat cover 78 via slide fasteners. Closed and sewn.

  FIG. 15 illustrates a pocket provided in the case 74. The pocket 75 is configured by closing the edges 72a and 72b of the first sewing fabric 27a and the second sewing fabric 27b, which are edged in a U-shape, by slide fasteners 25a and 25b. The edge of the corner 76 is bent at a plurality of inflection points 70a, 70b, and 70c, and the total length of the edge 72a of the first sewing fabric 27a is the same as the total length of the edge 72b of the second sewing fabric 27b. It has become.

That is, in FIG. 15, between the inflection points 70a and 70b of the closed portion (36) having an asymmetric curved shape, the slide fastener 25a sewn to one sewn fabric 27a is sewn to the other sewn fabric 27b. It becomes longer than the slide fastener 25b. However, between the inflection points 70b and 70c of the closed portion (36), the slide fastener 25a sewn to one sewing fabric 27a is shorter than the slide fastener 25b sewn to the other sewing fabric 27b.
Describing geometrically, the length of the slide fastener 25a sewn to one sewing fabric 27a having a long curvature radius Ra is such that the center angle ρ ₁ and the curvature radius Ra at the center of curvature 73a between the inflection points 70a and 70b. the product of the length of (Ra × ρ _1), and the slide fastener 25b which is sewn to the short other sewing fabric 27b having the radius of curvature Rb has a central angle [rho ₁ in the center of curvature 73a between the inflection point 70a and 70b And the radius of curvature Rb (Rb × ρ ₁ ), and since Ra> Rb, Ra × ρ ₁ > Rb × ρ ₁ .
Since Ra <Rb between the inflection points 70b and 70c, Ra × ρ ₂ <Rb × ρ ₂ is satisfied.

  As described above, when the folding edge 72 of the sewing fabric 27 is long and, therefore, the long slide fastener 25 is required, the curved end shape 72 is bent at at least one inflection point 70. It is recommended that

It is a perspective view of the slide fastener sewn on the sewing cloth. It is a perspective view of the slide fastener sewn on the sewing cloth. It is a top view of the sewing fabric by which the slide fastener was stitched. It is a top view of the sewing fabric by which the slide fastener was stitched. It is a top view of the sewing fabric by which the slide fastener was stitched. It is a top view of the sewing cloth by which the slide fastener concerning the present invention was stitched. It is sectional drawing of a slide fastener and sewing cloth in a sewing process. It is a perspective view of the fastener holder which concerns on this invention. It is principal part sectional drawing of the fastener holder which concerns on this invention. It is sectional drawing of the fastener holder and press piece which concern on this invention. It is a bottom view of the press piece which concerns on this invention. It is sectional drawing of the press piece in breaking line AB of FIG. It is a perspective view of a sewing product concerning the present invention. It is a perspective view of a sewing product concerning the present invention. It is a perspective view of a sewing product concerning the present invention.

Explanation of symbols

10: Ordinary slide fastener 11: Bottom surface 12: Opening 13: Vertical groove 14: Horizontal groove 15: Tape holder 16: Abutment 17: Lid 18: Opening 19: Space 20: Front 21: Back 22: Base 23: Engaging element 25: Slide fastener 26: Stringer 27: Sewing fabric 28: Base tape 30: Sewing needle 31: Pressing piece 32: Guide groove 33: Fold 34: Seam allowance 35: Sewing thread 36: Closing point 37: Edge 38: Pin 39: Support leg 40: Arm 41: Dovetail groove 42: Slider 43: Lid tip 44: Groove edge 45: Spring 46: Spring tip 47: Recess 48: Groove 49: Handle 50: Bottom surface 51: Groove inlet 52: Groove outlet 53: Intermediate portion 54: Through hole 55: Groove bottom 56 of the guide groove 57: Groove wall 57 of the guide groove 70: Groove wall 70 of the guide groove 70: Inflection point 71: Crease 72 of the sewing fabric 72: Folding edge 73: Center of curvature 7 : Case 75: Pocket 76: Corner 77: Back cover 78: Seat cover 79: Front fabric 80: Side fabric 81: Plane fabric 82: Side fabric 83: Back margin curve 84: Seat margin curve 85: Center fabric 86: Side fabric 87: Side fabric 88: Back fabric 89: Perimeter m: Groove width at the groove entrance of the guide groove n: Groove width at the exit of the guide groove w: Groove width Ra at the middle portion of the guide groove Ra: Radius of curvature Rb :curvature radius

Claims (4)

(1) A pair of sewing fabrics (27a) and a sewing fabric (27b) in which a slide fastener (25) is sewn along a crease (71) formed by folding a seam allowance (34) in parallel with an edge of the sewing fabric. Is closed via the stitched slide fastener (25),
(2) The base tape (28) of the slide fastener (25) is folded back at the junction with the stringer (26), and the stringer (26) and the base tape (28) overlap,
(3) The meshing element (23) protrudes from the front end of the stringer (26) toward the outside of the fold (33) of the base tape (28),
(4) Between the stringer (26) and the sewing fabric (27), the base tape (28) and the seam allowance (34) of the sewing fabric overlap and are sewn by the perforated thread (35), and the base tape fold (33) The crease (71) of the seam allowance of the sewing fabric overlaps,
(5) The folding edge (72a) formed by the fold (71a) of the seam allowance of the pair of one sewn fabric (27a) and the fold (71b) formed by the seam allowance of the other sewn fabric (27b) The end edge (72b) forms an asymmetrical identical curved shape that comes into close contact when abutting,
(6) The recessed folding end of one sewn fabric (27a) having the same curved shape at the closed location (36) of the pair of sewn fabrics (27a) and sewn fabric (27b) closed via the slide fastener The edge (72a) and the folded edge (72b) of the other sewing fabric (27b) are facing each other .
(7) The folding edges (72a, 72b) of the pair of sewing fabrics (27a, 27b) have a curved shape having at least one inflection point (70) ,
(8) A sewn product having the same total length of the two slide fasteners (25a, 25b) that are closed at the closing portion (36) of the pair of sewing fabrics (27a) and the sewing fabric (27b) . The slide fastener in which the base tape according to claim 1 is folded back at the junction with the stringer and the stringer and the base tape overlap with each other is used as a fold (71) for the base tape fold (33). A jig that guides the slide fastener to the working point of the sewing needle in the sewing machine in order to overlap and sew to the seam allowance (34) of the fabric,
(1) A downward vertical groove (13) which is continuous from the back surface (21) to the front surface (20) and whose bottom surface (11) is an opening (12), and an opening (18) in a direction crossing the vertical groove. A tape holder (15) having a lateral groove (14) formed with an opening between the lateral groove opening (18) and the longitudinal groove opening (12);
(2) an abutment (16) that supports the tape holder (15);
(3) A lid (17) for opening and closing the downward vertical groove opening (12) at a position away from the horizontal groove opening (18),
(4) An open space (19) through which the sewing fabric (27) can pass between the back side (21) and the front side (20) of the tape holder is provided below the bottom surface (11) of the tape holder. Zipper holder. The fastener holder according to claim 2 , wherein the abutment (16) is movably received by the platform (22). The base tape according to claim 1 is folded back at the junction with the stringer, the slide fastener in which the stringer and the base tape are overlapped, the fold of the base tape (33) is the fold of the seam allowance of the sewing fabric (71 A pressing piece (31) for holding the sewing fabric at the working point of the sewing needle of the sewing machine in order to sew on the seam allowance of the sewing fabric.
(1) A guide groove (32) is provided on the bottom surface (50) of the pressing piece (31) so that the stringer of the slide fastener is fitted and the stringer to be fitted is guided in the direction in which the sewing fabric passes.
(2) The groove width (m) of the groove inlet (51) of the guide groove is wider than the groove width (w) in the intermediate portion (53) between the groove inlet (51) and the groove outlet (52) of the guide groove. We have been,
(3) A through hole (54) through which the sewing needle passes is formed in the middle part (53) of the guide groove,
(4) The groove walls (56, 57) of the guide groove facing each other at the intermediate portion (53) face the direction in which the groove bottom (55) of the guide groove at the intermediate portion (53) separates from the through hole (54). A pressing piece inclined with respect to the bottom surface (50) of the pressing piece (31) .

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