Method for sewing fastener stringer to cloth, article, and slide fastener

Abstract

A fastener tape (3) and a cloth (101) are sewn to each other along a second virtual line (G2) parallel with a first virtual line (G1) determined from a direct contact between two or more fastener elements (4) and a sewing machine foot (200). The fastener tape (3) and the cloth (101) are sewn to each other along a fourth virtual line (G4) parallel with a third virtual line (G3) determined from a direct contact between a plastic member (10) and the sewing machine foot (200). The plastic member (10) has a guide surface (11) that the sewing machine foot (200) contacts such that the first and third virtual lines (G1, G3) extend on the same line to form one guide line (L1) and the second and fourth virtual lines (G2, G4) extend on the same line to form one planned sawing line (F2).

Description

Method for sewing a fastener stringer to fabric, article, and slide fastener

[0001] The present disclosure relates to a method for sewing a fastener stringer to a fabric, and more particularly to a method for sewing a fastener stringer to a fabric using a sewing machine with a sewing foot. The present disclosure also relates to an article and a slide fastener.

[0002] Patent Document 1 discloses a method of transporting a zipper chain and fabric on a sewing machine so that a direct contact state between a fastener element adjacent to the sewing machine foot and the sewing machine foot is maintained, and a method of sewing a zipper stringer to the fabric. Patent Document 2 addresses the problem of interference between the presser foot of the sewing machine and the fastener stop of a slide fastener (see paragraph 0002). To solve this problem, Patent Document 2 discloses a fastener with a special structure that contributes to facilitating sewing of a zipper stringer to fabric. Patent Document 3 explains narrowing the fastener stop portion to prevent interference between the fastener stop portion and the sewing machine foot (see the abstract of the same document). Although not discussing sewing a zipper stringer to fabric, slide fasteners disclosed in Patent Documents 4 to 6 are also known.

[0003] Japanese Utility Model Application Publication No. 51-95459 Japanese Patent Application Publication No. 2002-223820 Japanese Patent Application Publication No. 2003-180413 U.S. Patent No. 2,438,615 U.S. Patent No. 2,546,649 U.S. Patent No. 2,600,905

[0004] When the fastener is made of plastic, it is common to form the fastener wide in order to secure sufficient adhesive strength to the fastener tape (e.g., its core cord). However, in this case, when sewing the fastener tape of the fastener stringer to the fabric, the fastener stringer must be moved manually to avoid the fastener hitting the sewing machine foot, which imposes a significant burden on the sewing work, and further, there is a risk of variations in the quality of the perforations due to differences in the skill level of the sewing worker (e.g., differences in the degree to which the perforations curve or meander in the area adjacent to the fastener).

[0005] In light of the non-limiting exemplary problems described above, the inventors of the present application have discovered a new problem of reducing the workload of sewing a fastener stringer with a plastic member that prevents the slider from falling off to fabric, and further, promoting the assurance of quality of perforations regardless of the skill level of the sewing worker.

[0006] A method according to one aspect of the present disclosure relates to a method for sewing a fastener stringer, which includes a plurality of fastener elements provided individually or in series on longitudinal edge portions of the fastener tape in the longitudinal direction of the fastener tape, and a plastic member located adjacent to a distal fastener element of the plurality of fastener elements in the longitudinal direction of the fastener tape to prevent a slider from falling off, to a fabric using a sewing machine with a sewing machine foot, the method including: linearly feeding the fastener stringer based on direct contact between the sewing machine foot and two or more fastener elements included in the plurality of fastener elements and located adjacent to the sewing machine foot; sewing the fastener tape and the fabric along a second imaginary line parallel to a first imaginary line determined by the direct contact between the two or more fastener elements and the sewing machine foot; linearly feeding the fastener stringer based on direct contact between the plastic member and the sewing machine foot; and sewing the fastener tape and the fabric along a fourth imaginary line parallel to a third imaginary line determined by the direct contact between the plastic member and the sewing machine foot. The method includes linearly conveying the fastener stringer based on direct contact between two or more fastener elements and the sewing machine foot, and linearly conveying the fastener stringer based on direct contact between the plastic member and the sewing machine foot, in this order or in the reverse order. The plastic member has a guide surface with which the sewing machine foot comes into contact so that the first and third imaginary lines extend on the same straight line to form one guide line, and the second and fourth imaginary lines extend on the same straight line to form one planned sew line.

[0007] In an article to which a slide fastener according to another aspect of the present disclosure is sewn, the slide fastener includes first and second fastener stringers and a slider that moves in the front-to-rear direction to couple and decouple the first and second fastener stringers. The first fastener stringer includes a first fastener tape, a plurality of first fastener elements individually or in a series on the longitudinal side edges of the first fastener tape extending in the front-to-rear direction, and a plastic member located adjacent to a first fastener element located at the end of the plurality of first fastener elements in the front-to-rear direction to prevent the slider from falling off. Each first fastener element included in the plurality of first fastener elements has a surface facing inward relative to the first fastener tape and included in a first imaginary line extending in the front-to-rear direction. The plastic member is a separable stop box body. The box body includes a box portion located adjacent to the end fastener element and inserted into the slider, and one or more restraining surfaces to which the box pin is coupled and which restrain the slider. The article has perforations formed parallel to the first imaginary line, and the perforations are also formed parallel to a guide surface of the plastic member that is aligned in the same line as the first imaginary line.

[0008] A slide fastener according to yet another aspect of the present disclosure includes first and second fastener stringers and a slider that moves in the front-to-rear direction to couple and uncouple the first and second fastener stringers. The first fastener stringer includes a first fastener tape, a plurality of first fastener elements individually or in series on the longitudinal side edges of the first fastener tape extending in the front-to-rear direction, and a plastic member positioned adjacent to a first fastener element located at the end of the plurality of first fastener elements in the front-to-rear direction to prevent the slider from falling off. Each first fastener element included in the plurality of first fastener elements has a surface facing inward relative to the first fastener tape and included in a first imaginary line extending in the front-to-rear direction. The plastic member is a separable fastener box. The box includes a box portion positioned adjacent to the end fastener element and inserted into the slider, and one or more restraining surfaces to which the box pin couples and which restrain the slider. The box has a guide surface aligned in the same line as the first imaginary line.

[0009] In some embodiments, the plastic member is a separable fastener box, the box being adjacent to the terminal fastener element and including a box pin inserted into the slider, and a box portion having one or more restraining surfaces that couple with the box pin and restrain the slider, the guide surfaces including one or more first guide areas formed on the box pin and at least one second guide area formed on the box portion, the at least one second guide area being formed to form the same plane as the one or more first guide areas.

[0010] In some embodiments, the box pin has two flat surfaces aligned with the guide line and a concave surface formed between the flat surfaces.

[0011] In some embodiments, the length of the concave surface along the guide line is greater than the combined length of the two flat surfaces along the guide line.

[0012] In some embodiments, the opposing surfaces of the insert pin and the box pin that are inserted into the receiving space of the box part are at least partially shaped to be complementary to each other.

[0013] In some embodiments, the side edge portion of the fastener tape includes at least one core cord to which individual fastener elements of the plurality of fastener elements are fixed and to which a box pin and a box portion are fixed, the box portion having a first side surface and a first inner surface between which the core cord is positioned, the first inner surface partially defining a receiving space for the insert pin, and in the width direction of the fastener tape, the minimum distance between the center of the core cord and the first side surface is smaller than the minimum distance between the center of the core cord and the first inner surface.

[0014] In some embodiments, the relationship 1.2<(T / S)<1.6 is satisfied, where S represents the minimum distance between the center of the core cord and the first side surface, and T represents the minimum distance between the center of the core cord and the first inner surface.

[0015] In some embodiments, the box has a first side and a second side opposite the first side, the width of the box is defined by the first side and the second side, and (i) a centerline located at the center of the width of the box defined by the first side and the second side is located away from the fastener tape to a position where it does not intersect with the box pin, and / or is located away from the fastener tape more than the centerline of a slide fastener including the fastener stringer as a first fastener stringer; and / or (ii) the first side is located a first distance away from the centerline of the slide fastener including the fastener stringer as a first fastener stringer, and the second side is located a second distance away from the centerline of the slide fastener, the first distance being less than the second distance. In some cases, (ii) is satisfied, and 1.1<(D2 / D1)<1.5 is satisfied, where D1 means the first distance and D2 means the second distance.

[0016] In some embodiments, the guide surface is comprised of an inclined surface that slopes outward relative to the fastener tape as it moves away from the tape surface of the fastener tape.

[0017] In some embodiments, when the slider is stopped in its rearmost position by the box portion, the guide surface is approximately flush with the inner wall surfaces of the rear ends of the flanges of the upper and lower blades of the slider.

[0018] In some embodiments, the box portion is shaped so as not to contact one of the left and right flanges of the upper and lower wings of the slider.

[0019] In some embodiments, the sewing machine foot is set in the sewing machine so that its lower surface contacts the tape surface of the fastener tape of the fastener stringer.

[0020] In some embodiments, the fastener stringer is sewn to the fabric while being connected to another fastener stringer.

[0021] According to one aspect of the present disclosure, the workload of sewing a fastener stringer with a plastic member that prevents the slider from falling off to fabric is reduced, and further, the quality of the perforations is promoted regardless of the skill level of the sewing worker.

[0022] 1 is a partial front view of the inside of an article (e.g., a garment) according to one embodiment of the present disclosure, in which a slide fastener is sewn to an opening of the article so as to be openable and closable. In FIG. 1, arrow F indicates the front, arrow Re indicates the rear, arrow L indicates the left, and arrow R indicates the right. Guide lines L1 and L2 are set on both the left and right sides of the center line CL of the slide fastener. Guide line L1 does not intersect the stopper, and guide line L2 intersects the stopper. This is a schematic front view of a slider. This is a schematic cross-sectional view of the slider taken along dashed line III-III in FIG. 2. This is a schematic side view of the right fastener stringer. This is a schematic cross-sectional view of the slide fastener taken along dashed line V-V in FIG. 1. This is a schematic cross-sectional view of the slide fastener taken along dashed line VI-VI in FIG. 5. This is a schematic view showing the process of inserting an insert pin into the receiving space of the box portion of the box body via the slider. FIG. 1 is a schematic diagram showing how the fabric and zipper stringer are intermittently fed in the conveyance direction by operation of the sewing machine, and how they are sewn together with sewing threads (upper thread and bobbin thread). FIG. 2 is a schematic diagram showing the positional relationship between the sewing machine foot, zipper element, and box body. FIG. 3 is a schematic diagram showing how the zipper stringer and fabric are sewn together based on operation of the sewing machine. FIG. 4 is a schematic diagram showing how the zipper stringer and fabric are sewn together based on operation of the sewing machine. FIG. 5 is a schematic diagram showing how the zipper stringer and fabric are sewn together based on operation of the sewing machine. FIG. 6 is a schematic diagram showing how the left zipper stringer is sewn to the fabric in a state where it is not connected to the right zipper stringer. FIG. 7 is a schematic diagram showing how the right zipper stringer is sewn to the fabric in a single-stringer state where the left zipper stringer is not connected. FIG. 8 is a schematic diagram showing how the left and right zipper stringers are sewn to the fabric in the same sewing process by the same sewing machine. FIG. 9 is a schematic diagram showing variations of fasteners. FIG. 10 is a schematic diagram showing variations of fastener elements.

[0023] Various embodiments and features will be described below with reference to the drawings. Those skilled in the art will be able to combine the various embodiments and / or features without excessive explanation and will be able to understand the synergistic effects of such combinations. Duplicate descriptions between embodiments will be omitted as a general rule. The reference drawings are primarily intended to describe the invention and are simplified for ease of illustration. Each feature is not only applicable to the method, article, and slide fastener disclosed in this application, but is also understood as a universal feature applicable to various other methods, articles, and slide fasteners not disclosed herein.

[0024] In this specification, the front-to-rear direction corresponds to the movement direction of the slider for opening and closing the slide fastener, and corresponds to the longitudinal direction of the slide fastener (or the fastener stringer or fastener tape). The left-to-right direction is a direction perpendicular to the front-to-rear direction, and corresponds to the width direction of the slide fastener (or the fastener stringer or fastener tape). The up-to-down direction is a direction perpendicular to the front-to-rear and left-to-right directions, and corresponds to the thickness direction of the fastener tape. Usually, when a fastener stringer is set in a sewing machine, the front-to-rear direction corresponds to the transport direction of the fastener stringer, and the up-to-down direction corresponds to the vertical direction (the direction of gravity), but this is not limited to this.

[0025] As shown in FIG. 1 , the article 100 includes fabric 101, fabric 102, and slide fastener 1, and an opening between the fabric 101 and fabric 102 can be closed by the slide fastener 1. Specifically, left and right fastener stringers 2, 5 of the slide fastener 1 are sewn to the fabrics 101, 102. When the slider 9 moves backward, the left and right fastener stringers 2, 5 are released from their connection, forming an opening between the fabric 101 and fabric 102. When the slider 9 moves forward, the left and right fastener stringers 2, 5 are connected, closing the opening between the fabric 101 and fabric 102. The fabrics 101, 102 may be, for example, halves of the front body of an article such as a jacket or a hoodie, but are not limited thereto. The fabrics 101, 102 may be different portions of the same fabric or separate fabrics. The left and right fastener stringers 2, 5 of the slide fastener 1 can be completely separable from each other, but are not limited thereto.

[0026] The slide fastener 1 has a pair of left and right fastener stringers 2, 5 and a slider 9 for connecting and disconnecting them. Each fastener stringer 2, 5 has fastener tapes 3, 6, a plurality of fastener elements 4, 7 provided individually or in a series on the longitudinal side edges of the fastener tapes 3, 6, and plastic members 8a, 8b located adjacent to the terminal fastener elements 4, 7 of the plurality of fastener elements 4, 7 and preventing the slider 9 from falling off the fastener stringer 2, 5. The fastener tapes 3, 6 are woven fabrics, knitted fabrics, or a mixture thereof. The fastener elements 4, 7 are made of plastic or metal. In FIG. 1, the fastener elements 4, 7 are provided as individual, independent island portions in the longitudinal direction of the fastener stringers 2, 5, but are not limited to this. They can also be provided in a series as individual spiral units of a spiral monofilament having engaging heads formed at a predetermined pitch (see FIG. 17). In FIG. 1 , the plastic member 8a is the box body of the separable fastener 8, and the plastic member 8b is the insert pin of the separable fastener 8, but this is not limited thereto. The separable fastener 8 is used to completely separate a pair of left and right fastener stringers 2, 5 from each other. One fastener stringer 2 is provided with a plastic member 8a as a box body, and the other fastener stringer 5 is provided with a plastic member 8b as an insert pin, and the box body and the insert pin are separable. Such a fastener 8 is also called a separable bottom stop or an opener. Another example is a form in which the plastic members 8a and 8b are an integrated fastener 8' manufactured by a single injection molding process (see FIG. 16 ). In this case, the plastic members 8a and 8b may be formed into an indistinguishable box shape. Such a fastener 8' is a fastener used in a product in which the pair of left and right fastener stringers 2, 5 are not completely separated from each other, and is not the separable bottom stop or opener described above.

[0027] Typically, the fastener tapes 3, 6 include a warp knitted structure, and a core cord is provided at the side edge portion of the fastener tapes 3, 6. By providing the core cord at the side edge portion of the fastener tapes 3, 6, the fastening strength of the fastener elements 4, 7 to the fastener tapes 3, 6 is increased, and the fastener elements 4, 7 are prevented from falling off the fastener tapes 3, 6. The core cord may be a portion where a core material is introduced into a hollow weave structure of the warp knitted structure, but is not limited to this. Note that, when the spiral monofilament shown in Fig. 17 is used as the fastener elements 4, 7, the core cord may be provided at the side edge portion of the fastener tapes 3, 6 together with the fastener elements 4, 7 in a state where it is inserted into the spiral monofilament.

[0028] The following description will be given with reference to Figures 1 and 10. For the right-side fastener stringer 2, a first imaginary line G1 (see Figure 10) is determined by the direct contact between two or more fastener elements 4 and the sewing machine foot 200. A third imaginary line G3 (see Figure 10) is determined by the direct contact between the plastic member 8a and the sewing machine foot 200. The first and third imaginary lines G1 and G3 extend on the same straight line to form a single (common) guide line L1 (see Figures 1 and 10). The fastener tape 3 and the fabric 101 are sewn together along a second imaginary line G2 (see Figure 10) parallel to the first imaginary line G1. The fastener tape 3 and the fabric 101 are sewn together along a fourth imaginary line G4 (see Figure 10) parallel to the third imaginary line G3. The second and fourth virtual lines G2, G4 extend in the same straight line to form one (common) sewing line F2 (see Figure 10), and after the sewing process, a perforation F1 is formed in the same straight line as the sewing line F2 (see Figures 1 and 10).

[0029] In this embodiment, the plastic member 8a has a guide surface 11 with which the sewing machine foot 200 contacts so that the first and third imaginary lines G1, G3 extend on the same straight line to form a single (common) guide line L1, and the second and fourth imaginary lines G2, G4 extend on the same straight line to form a single (common) planned sew line F2. This reduces the workload of sewing a fastener stringer with a plastic member that prevents the slider from falling off to fabric, and further promotes ensuring the quality of the perforations regardless of the sewing worker's level of skill. Regarding the sewing method, it is optional whether the sewing machine foot 200 first positions adjacent to the fastener element 4 to form the first imaginary line G1 and then contacts the plastic member 8a to form the third imaginary line G3, or vice versa.

[0030] Similar features can be applied to the left-side fastener stringer 5 that is not connected to the right-side fastener stringer 2. A fifth imaginary line (not shown) is determined by direct contact between two or more fastener elements 7 and the sewing machine foot 200. A seventh imaginary line (not shown) is determined by direct contact between the plastic member 8b and the sewing machine foot 200. The fifth and seventh imaginary lines extend on the same straight line to form a single (common) guide line L2 (see FIGS. 1 and 10). The fastener tape 6 and the fabric 102 are sewn together along a sixth imaginary line (not shown) that is parallel to the fifth imaginary line. The fastener tape 6 and the fabric 102 are sewn together along an eighth imaginary line (not shown) that is parallel to the seventh imaginary line (not shown). The sixth and eighth imaginary lines extend on the same straight line to form a single (common) planned sew line, and after the sewing process, perforations are formed on the same straight line as the planned sew line.

[0031] The first imaginary line G1 can be understood as being on the same straight line in the front-to-rear direction as the side surface 44 of the fastener element 4 when the slide fastener 1 is viewed from the front (see FIG. 1 ). The exact position of the first imaginary line G1 may vary slightly depending on the surface shape or inclination angle of the side surface of the sewing machine foot 200 that faces and contacts the fastener element 4, as well as the inclination angle of the side surface 44 of the fastener element 4, but this does not contradict the above point. Typically, the side surface 44 of the fastener element 4 has a surface or partial surface facing the inside of the fastener tape 3, and these are arranged on one (common) first imaginary line G1 extending in the front-to-rear direction. The surfaces or partial surfaces of each fastener tape 3 included in the first imaginary line G1 may be at the same height from the mounting surface (e.g., the upper surface) of the fastener tape 3 on which the sewing machine foot 200 is placed. The first imaginary line G1 is also parallel to the center line CL of the slide fastener 1 and the longitudinal direction of the fastener stringer 2. The center line CL is a line passing through the widthwise center of the pair of left and right fastener stringers 2, 5 when the left and right fastener stringers 2, 5 are engaged with each other.

[0032] Each fastener element 4 extends outward relative to the fastener tape 3 beyond the side edge (which may also be called an edge) of the fastener tape 3 facing the fastener tape 6. Each fastener element 4 has a side surface 44 facing inward of the fastener tape 3, and these are included in a first imaginary line G1 extending in the front-to-rear direction. The side surfaces 44 of the multiple fastener elements 4 are arranged on the same straight line. Similarly, each fastener element 7 extends outward relative to the fastener tape 6 beyond the long edge (which may also be called an edge) of the fastener tape 6 facing the fastener tape 3. Each fastener element 7 has a side surface 74 facing inward of the fastener tape 6. The side surfaces 74 of the multiple fastener elements 7 are arranged on the same straight line.

[0033] The fastener elements 4, 7 may be constricted plastic members including a base 41, 71, a neck 42, 72, and an engaging head 43, 73 fixed to the fastener tapes 3, 6 (particularly, their core cords). However, the shape should not be limited to that shown in FIG. 1 , and may have, for example, a V-shape. The width direction of the fastener elements 4, 7 coincides with the longitudinal direction of the fastener stringers 2, 5. The necks 42, 72 of the fastener elements 4, 7 have the smallest width. The bases 41, 71 are located within the tape plane of the fastener tapes 3, 6. The necks 42, 72 and the engaging heads 43, 73 are located outside the tape plane of the fastener tapes 3, 6. The tape plane of the fastener tapes 3, 6 is the upper or lower surface that defines the thickness of the fastener tapes 3, 6.

[0034] Projecting pieces can be formed on both sides of the necks 42, 72 of the fastener elements 4, 7, protruding from the bases 41, 71. Correspondingly, grooves extending in the longitudinal direction of the fastener stringers 2, 5 can be formed on the tip surfaces of the engaging heads 43, 73. The projecting pieces of the mating fastener elements are received in the grooves, and vertical displacement of the left and right fastener elements 4, 7 is restricted.

[0035] 2 and 3 show a non-limiting example of the slider 9. The slider 9 moves on the center line CL of the slide fastener 1. The slider 9 typically includes an upper wing 91, a lower wing 92, and a connecting post 93 connecting the upper wing 91 and the lower wing 92 at their front ends, thereby defining a Y-shaped element passage. The element passage has one rear opening M1 for an element combination in which fastener elements 4 and fastener elements 7 are alternately connected, and two front openings M2 and M3 on both sides of the connecting post 93 through which the fastener elements 4 and fastener elements 7 pass individually. The slider 9 can include upper flanges 94 and 95 protruding downward from the left and right side edges of the upper wing 91 and / or lower flanges 96 and 97 protruding upward from the left and right side edges of the lower wing 92, thereby restricting the left-right displacement of the fastener elements 4 and 7 within the Y-shaped passage. Upper and lower flanges 95 and 97 on the right side of the slider 9 define a slit through which the fastener tape 3 is inserted. Upper and lower flanges 94 and 96 on the left side of the slider 9 define a slit through which the fastener tape 6 is inserted. The slider 9 may optionally include a pull tab attachment portion 98 and a pull tab 99 attached thereto.

[0036] To reiterate, the plastic member 8a (e.g., the box body 10 described below) has a guide surface 11 aligned with the above-mentioned guide line L1. This allows the sewing machine foot to smoothly transition from directly contacting the fastener element 4 to directly contacting the guide surface 11 of the plastic member 8a, and vice versa, when sewing the fastener stringer 2 to the fabric 101 using a sewing machine. As a result, the burden of sewing work is reduced, and the quality of the perforations is ensured regardless of the sewing worker's level of skill. In particular, not only is the effort required to avoid interference between the plastic member 8a and the sewing machine foot eliminated, but the direct contact between the guide surface 11 of the plastic member 8a and the sewing machine foot ensures proper alignment of the fastener stringer 2 with the sewing machine foot, resulting in linear perforations in both the area adjacent to the fastener element 4 and the area adjacent to the plastic member 8a. This also reduces the training and material costs required to improve the sewing worker's skill. Just to be clear, even if the plastic member 8a begins to enter the area R200 adjacent to the sewing machine foot, there is no change in the alignment of the fastener stringer 2 with respect to the sewing machine foot, and vice versa. Also, the guide surface 11 may include a flat or smooth surface that extends in the same straight line as the guide line L1.

[0037] The above-described feature can also be explained as follows: The guide surface 11 of the plastic member 8a defines an extension line that is an extension line of the first virtual line G1. When the guide surface 11 of the plastic member 8a comes into contact with the sewing machine foot, a perforation F1 is formed parallel to the extension line.

[0038] Conventionally, when sewing a fastener stringer to fabric in a configuration in which the width W3a (see FIG. 1) of the fastener tape exposed on the front side of the article is narrower (for example, when the exposed width W3a of the fastener tape is in the range of 0 mm to 1.5 mm), the plastic member 8a gets in the way, making it difficult to sew the fastener stringer 2. According to the above-described features, even in such a case, the perforations can be formed linearly. Furthermore, when the fastener elements 4 are individually formed from resin, the side surface 44 of each fastener element 4 and the guide surface 11 of the plastic member 8a are aligned in the same straight line (as shown in FIG. 1), which also allows the slide fastener 1 to have a slimmer appearance. The linearity of the perforations F1 also contributes to an even sleeker appearance in an article 100 to which the slide fastener 1 is sewn.

[0039] In some embodiments, the guide surface 11 is included in an inclined surface that inclines outward relative to the fastener tape 3 as it moves upward away from the tape surface of the fastener tape 3. This inclined surface intersects with the normal to the tape surface of the fastener tape 3 at an angle of 3° or less (see angle θ in FIG. 5 ), for example. This makes it possible to mitigate the contact between the sewing machine foot and the guide surface 11 from acting as a resistance to the feeding of the fastener stringer 2. Note that a first guide region and a second guide region, which will be described later, may also be included in the inclined surface.

[0040] 4 to 7, the plastic member 8a can be the box body 10 of the separable fastener 8, and the plastic member 8b can be the insert pin 50 of the separable fastener 8. The box body 10 includes a box pin 30 located adjacent to the fastener element 4 located at the end of the array of multiple fastener elements 4 and inserted into the slider 9, and a box portion 20 having one or more restraining surfaces 16, 17 to which the box pin 30 is coupled and which restrain the slider 9. The thickness of the box pin 30 is equal to or less than the thickness of the box portion 20, for example, about half of the thickness. As will be apparent from the description below, the box portion 20 is shaped so as not to come into contact with one of the left and right flanges of the upper wing plate 91 and the lower wing plate 92 of the slider 9.

[0041] The box portion 20 has a first side surface 21 arranged in the same straight line as the guide line L1 (and / or first virtual line G1) described above, and a second side surface 22 provided on the opposite side of the first side surface 21, which together define the width W20 of the box portion 20. The first side surface 21 is arranged in the same straight line as the guide line L1 (and / or first virtual line G1) described above, and coincides with or includes the guide surface 11 described above. The first side surface 21 is a flat or smooth surface, and does not have a convex portion that protrudes to the right so as to intersect with the guide line L1.

[0042] In some cases, the width dimension of the box portion 20 is set asymmetrically with respect to the center line CL of the slide fastener 1. In this regard, the center line C1, which is located at the center of the width of the box portion 20 defined by the first side surface 21 and the second side surface 22, may be located away from the fastener tape 3 to a position where it does not intersect with the box pin 30, and / or may be located farther from the fastener tape 3 than the center line CL of the slide fastener 1. Additionally or alternatively, the first side surface 21 may be located a first distance D1 away from the center line CL of the slide fastener, and the second side surface 22 may be located a second distance D2 away from the center line CL of the slide fastener, where the first distance D1 is smaller than the second distance D2, and preferably satisfies 1.1 < (D2 / D1) < 1.5. By satisfying any or all of the above conditions, the position of the guide surface 11 on the box portion 20 is optimized. Additionally or alternatively, the desired mechanical strength of the box portion 20 is ensured.

[0043] The box section 20 is shaped to receive the insert pin 50 and typically includes an upper plate 25, a lower plate 26, and a connecting portion 27 connecting the upper plate 25 and the lower plate 26, as shown in FIG. 5 . The upper plate 25 has a stop surface 16 for stopping the slider 9, and the lower plate 26 has a stop surface 17 for stopping the slider 9 (see FIG. 4 ). The upper plate 25 has a flange 28 that protrudes downward from its tip, which is located away from the connecting portion 27. The lower plate 26 has a flange 29 that protrudes upward from its tip, which is located away from the connecting portion 27. The upper plate 25, the lower plate 26, the connecting portion 27, and the flanges 28 and 29 define a receiving space for the insert pin 50. A slit is formed between the upper and lower flanges 28 and 29 to allow the fastener tape 6 to which the insert pin 50 is fixed to pass.

[0044] The box portion 20 includes a first inner surface 23 and a second inner surface 24, each of which partially defines a space for receiving the insert pin 50. The core cord 3c is located between the first inner surface 23 and the first side surface 21. In the width direction of the fastener tape 3, the minimum distance S between the center of the core cord 3c and the first side surface 21 is smaller than the minimum distance T between the center of the core cord 3c and the first inner surface 23, and preferably satisfies 1.2<(T / S)<1.6. This ensures sufficient adhesive strength of the box portion 20 to the core cord 3c.

[0045] The first inner surface 23 extends along the center line CL of the slide fastener 1. The second inner surface 24 extends along the aforementioned guide line L2. The second side surface 22 is located outward of the guide line L2 from the fastener tape 3. This ensures the appropriate dimensions of the insert pin 50 and the necessary mechanical strength of the box portion 20. However, because the second side surface 22 is located farther from the center line CL than the guide line L2 (in other words, because the guide line L2 intersects with the box portion 20), there is a risk that the sewing machine foot will interfere with the left portion of the box portion 20. This problem can be addressed by devising a method for sewing the left fastener stringer 5 to the fabric 102 (see, for example, FIG. 13 ). Alternatively, this can be addressed by thinning the insert pin 50 and the flange 29 to position the second side surface 22 in the same line as the guide line L2. In this case, a reinforcing portion can be provided on the second inner surface 24 side (receiving space side) of the flange 29 to supplement the necessary mechanical strength of the box portion 20.

[0046] The flanges 28, 29 may include a protrusion (see reference numeral 29a in FIG. 6) having a width corresponding to the distance between the second inner surface 24 and the second side surface 22, and a stop wall (see reference numeral 29b in FIG. 6) located behind the protrusion to prevent the insert pin 50 from moving backward. The insert pin 50 is inserted into a receiving space between the protrusion of the flanges 28, 29 and the connecting portion 27. Dust that has entered the receiving space can be discharged through the space between the stop wall of the flanges 28, 29 and the connecting portion 27.

[0047] The box pin 30 has a first side surface 31 on the same side as the first side surface 21 of the box portion 20, and a second side surface 32 on the same side as the second side surface 22 of the box portion 20. The first side surface 31 extends along the above-mentioned guide line L1 and includes flat surfaces 31a and 31c arranged in the same straight line as the guide line L1. The entire first side surface 31 may extend in the same straight line as the above-mentioned guide line L1. A concave surface 31b is formed between the above-mentioned flat surfaces 31a and 31c, which allows the sewing machine foot to maintain a contact state similar to that with the side surfaces 44 of the preceding fastener element 4. Advantageously, the length of the concave surface 31b along the guide line L1 is longer than the combined length of the flat surfaces 31a and 31c along the guide line L1, thereby suppressing a sudden change in contact resistance. Typically, the flat surface 31a is shorter than the length of the side surface 44 of one fastener element 4 along the guide line L1.

[0048] When the first side surface 21 of the box portion 20 enters the area R200 adjacent to the sewing machine foot 200, the contact resistance between the sewing machine foot 200 and the fastener stringer 2 (contact resistance between the sewing machine foot 200 and the fastener element 4 + contact resistance between the sewing machine foot 200 and the box body 10) increases in proportion to the length of the first side surface 21. Conversely, this can serve as a tactile signal to notify the sewing operator that they are approaching the sewing end position.

[0049] The second side surface 32 is formed with a convex surface 32a that intersects with the center line CL of the slide fastener 1 and a concave surface 32b that is recessed relative to the center line CL of the slide fastener 1. The side surface of the insert pin 50 that faces the second side surface 32 of the box pin 30 is complementarily shaped to have a concave surface 51a and a convex surface 51b, which promotes more sufficient engagement between the box pin 30 and the insert pin 50 and, for example, restricts forward and backward displacement of the insert pin 50 relative to the box pin 30. In this way, it is advantageous to at least partially shape the opposing surfaces of the insert pin 50 and the box pin 30 complementarily.

[0050] If the box body 10 (and, naturally, the box pin 30) is made of resin, the box pin 30 can be formed with a complex or precise shape, as described above. In some cases, the box section 20 and the box pin 30 are manufactured by a single injection molding and / or are integrally bonded and inseparable without destruction. Preferably, only a single gate mark is formed on the surface of the box body 10. This single gate mark indicates that the box section 20 and the box pin 30 were molded in the same molding cavity during injection molding. By integrally molding the box section 20 and the box pin 30 in this manner, rather than molding them separately and then combining them, sufficient mechanical strength of the box body 10 can be ensured even when the guide surface 11 is formed on the box section 20.

[0051] The insert pin 50 is located adjacent to the fastener element 7 located at the end of the arrangement of the multiple fastener elements 7, and is fixed to the core string 6c of the fastener tape 6. The insert pin 50 extends longitudinally of the fastener stringer 5, and is inserted into the receiving space of the box portion 20 via the slider 9. The insert pin 50 has a first side surface 51 on the box portion 20 side and a second side surface 52 on the opposite side. As described above, the first side surface 51 is formed with a concave surface 51a and a convex surface 51b. The second side surface 22 is a flat or smooth surface extending in the same straight line as the guide line L2 described above, but may optionally have a curved surface 52a curved opposite the convex surface 51b, which makes it easier for the insert pin 50 to move inside the slider 9. Optionally, an engagement portion 55 that engages with the fastener element 4 located at the end of the arrangement of the multiple fastener elements 4 may be provided at the front end of the insert pin 50. The engaging portion 55 extends outward from the fastener tape 6 and includes a portion to be inserted into the gap between the head and base of the mating fastener element. When the insert pin 50 is made of resin, the insert pin 50 can be formed into a complex or precise shape as described above.

[0052] An explanation will be given with reference to Figure 7. The above-mentioned stop surfaces 16, 17 of the box portion 20 are formed with a width less than the width W9 of the rear end of the slider 9. The box portion 20 contacts the upper wing 91 of the slider 9 with its stop surface 16, and the front end surface of its flange 28 contacts the rear end surface of the left flange 94 of the slider 9, but does not contact the right flange 95 of the slider 9. The box portion 20 contacts the lower wing 92 of the slider 9 with its stop surface 17, and the front end surface of its flange 29 contacts the rear end surface of the left flange 96 of the slider 9, but does not contact the right flange 97 of the slider 9. In this case, it is not possible to completely eliminate the possibility that force will be applied unevenly from the slider 9 to the box portion 20 with respect to the center line CL of the slide fastener 1, but the stop surfaces 16, 17 extend sufficiently far in the left-right direction, so the above-mentioned issue does not pose a major problem. Preferably, the length of the restraining surfaces 16, 17 in the width direction of the fastener tape 3 is equal to or less than the width W9 of the rear end of the slider 9 in the same direction, and is equal to or greater than 0.8 times the width W9.

[0053] In a configuration in which the second side surface 22 is aligned with the guide line L2, the front end surfaces of the flanges 28, 29 do not contact the rear end surfaces of the left flanges 94, 96 of the slider 9. In this case, the stop surfaces 16, 17 contact the upper and lower blades 91, 92 of the slider 9, thereby preventing the box section 20 from passing through the rear opening M1 of the slider 9. To distribute the force applied to the box section 20 from the slider 9, it is possible to increase the thickness of the upper and lower blades 25, 26 to ensure a large thickness for the stop surfaces 16, 17. However, it is preferable that the upper and lower surfaces of the upper and lower blades 25, 26 be flush with the upper and lower surfaces of the upper and lower blades 91, 92 of the slider 9, respectively, thereby achieving a slim appearance for the slide fastener 1. Furthermore, this prevents the fastener stringers 2, 5 from tilting due to the thickness of the box section 20 during sewing, which would otherwise impair their guide function. From the above, it is preferable for the slider 9 to contact the stop surfaces 16, 17 and the front end surfaces of the flanges 28, 29 from the viewpoints of giving a slim appearance, maintaining the guide function, and dispersing the force applied from the slider 9 to the box portion 20.

[0054] Referring to FIG. 5 , the edges between the top surface of the box portion 20 and the second side surface 22 are chamfered, as are the edges between the bottom surface of the box portion 20 and the second side surface 22. The angle of inclination of the chamfer between the top surface of the box portion 20 and the second side surface 22 increases as the edge approaches the second side surface 22. That is, a gradual slope toward the second side surface 22 is formed on the top surface of the box portion 20. As a result, the flanges 28 and 29 can maintain a width (thickness) that matches the distance between the second inner surface 24 and the second side surface 22 throughout their entire vertical height range. The formation of the gradual slope also contributes to the slim appearance of the box portion 20. In FIG. 5 , the edges between the top and bottom surfaces of the box portion 20 and the first side surface 21 are also chamfered in the same manner.

[0055] Generally speaking, the guide surface 11 may include one or more first guide regions (e.g., the flat surfaces 31a and 31c) formed on the box pin 30 and at least one second guide region (e.g., the first side surface 21) formed on the box portion 20. The second guide region is formed to form the same plane as the first guide region. Furthermore, when the slider 9 is stopped at its rearmost position by the box portion 20, the guide surface 11 may be substantially flush with the inner wall surfaces S9 of the rear ends of the flanges 94 and 96 of the upper and lower blades 91 and 92 of the slider 9 (see FIG. 7). The inner wall surfaces S9 of the rear ends of the flanges 94 and 96 extend parallel to the center line CL of the slide fastener 1.

[0056] 8 to 12, a method for sewing the fastener stringer 2 and the fabric 101 together based on the operation of the sewing machine 900 will be described. As shown in Fig. 8, a laminate in which the fastener tape 3 of the fastener stringer 2 is superimposed on the fabric 101 is placed on the needle plate 999 of the sewing machine 900. The sewing machine foot 200 applies an appropriate weight to the laminate to prevent it from shifting position. Advantageously, the sewing machine foot 200 is set so that its underside comes into contact with the tape surface of the fastener tape of the fastener stringer (i.e., the sewing machine foot 200 does not come into contact with the fabric to which the fastener stringer is sewn). This ensures reliable contact between the sewing machine foot 200 and the fastener element 4 even when the fastener element 4 is small in size.

[0057] The above-mentioned laminate is intermittently transported downstream in the transport direction (see arrow J1) in response to the operation of the feed dog 901 (e.g., box-shaped movement indicated by arrow J2). While the laminate is stationary, the upper needle 301, with the upper thread 401 threaded through its eye, descends and penetrates the laminate. The upper thread 401 and the lower thread 402 supplied therefrom are intertwined by the operation of a lower thread supply unit 302 (e.g., a horizontal or vertical rotary hook). When the upper needle 301 ascends, the lower thread 402 is entrained therewith, and tension is applied to both threads. In this way, the fabric 101 and the fastener tape 3 are sewn together with the sewing threads (the upper thread 401 and the lower thread 402). Typically, the laminate transport period and the operation period of the upper needle and the lower thread supply unit are set complementary to each other, but this is not limited thereto, and the two periods may partially overlap.

[0058] When sewing the fabric 101 and the fastener tape 3 together using the sewing machine 900 as described above, a sewing operator generally assists in feeding the fastener stringer 2 to the sewing machine foot 200 (more specifically, the vertical movement position of the upper needle 301), so that the fastener stringer 2 is fed toward the sewing machine foot 200 at an appropriate posture or angle. As can be seen from the above description, in this embodiment, the plastic member 8a has a guide surface 11 arranged on the same straight line as the first imaginary line G1 described above. This allows the sewing machine foot 200 to smoothly transition from a state in which it is in direct contact with the fastener element 4 to a state in which it is in direct contact with the guide surface 11 of the plastic member 8a, and vice versa, when sewing the fastener stringer 2 and the fabric 101 together using the sewing machine 900. As a result, the workload of sewing the fastener stringer 2 to the fabric 101 is reduced, and furthermore, the quality of the perforations is ensured regardless of the sewing operator's level of skill.

[0059] 9 and 10 , during the period in which the fastener stringer 2 and the fabric 101 are transported based on the operation of the sewing machine 900, the fastener stringer 2 is transported linearly based on the direct contact between the fastener element 4 and the sewing machine foot 200. Based on the operation of the sewing machine 900, the fastener tape 3 and the fabric 101 are sewn together along the planned sewing line F2 that is parallel to the above-mentioned guide line L1, and a linear perforation F1 is formed.

[0060] 10 and 11 , from the moment the plastic member 8a, which is located upstream of the multiple fastener elements 4 in the conveying direction and which prevents the slider 9 from falling off the fastener stringer 2, begins to enter the area R200 adjacent to the sewing machine foot 200 (i.e., from that moment onward as the starting point), the fastener stringer 2 is conveyed linearly along the conveying direction based on direct contact between the guide surface 11 of the plastic member 8a, which is arranged collinearly with the guide line L1, and the sewing machine foot 200. Even if the fastener stringer 2 continues to be fed linearly toward the sewing machine foot 200, the plastic member 8a will not collide with the sewing machine foot 200, and therefore a linear perforation F1 will be formed. In other words, there is no need to adjust the posture or angle of the fastener stringer 2 to avoid collision of the plastic member 8a with the sewing machine foot 200. In particular, not only is collision between the sewing machine foot 200 and the plastic member 8a avoided, but the sewing machine foot 200 comes into contact with the guide surface 11 of the plastic member 8a, and based on this contact between the two, the fastener stringer 2 continues to be in a stable conveying position relative to the sewing machine foot 200. As a result, the perforations F1 are formed linearly even in the area adjacent to the plastic member 8a.

[0061] 10, the side surfaces 44 of two or more fastener elements 4 are in contact with the sewing machine foot 200. Based on the operation of the sewing machine 900, a perforation F1 is formed along a second imaginary line G2 (an intended sewing line F2) parallel to a first imaginary line G1 determined by the contact between the side surfaces 44 of two or more fastener elements 4 and the sewing machine foot 200.

[0062] In some cases, the sewing machine foot 200 includes two pressure plates 201, 202 extending parallel to the feed direction and upstream in the feed direction, and a connecting portion 203 connecting these plates, and the up and down movement position of the upper needle 301 is set between the two pressure plates 201, 202. The sewing machine foot 200 contacts the side surface 44 of the fastener element 4 at one side surface 201a of the pressure plate 201. The one side surface 201a of the pressure plate 201 is a flat surface extending linearly parallel to the feed direction, but this is not necessarily limited to this, and may be, for example, a wavy surface. Even in this case, the technical effects of the present disclosure are not limited. The shape of the sewing machine foot 200 is not limited to that shown in the drawings.

[0063] 11, the side surface 44 of the fastener element 4 and the flat surface 31a of the box pin 30 (i.e., part of the guide surface 11) are in contact with the sewing machine foot 200. The first side surface 31 of the box pin 30 is formed in the same straight line as the guide line L1 without forming a convex portion with respect to the guide line L1. Therefore, even if the box pin 30 enters an area adjacent to the sewing machine foot 200, the two do not interfere with each other. Therefore, the formation of the linear perforation F1 continues in the area adjacent to the box pin 30.

[0064] 12, the side surface 44 of the fastener element 4, the flat surfaces 31a and 31c of the box pin 30 (i.e., part of the guide surface 11), and the first side surface 21 of the box portion 20 (i.e., the remaining part of the guide surface 11) are in contact with the sewing machine foot 200. The first side surface 21 of the box portion 20 is formed in the same straight line as the guide line L1 without forming a convex portion with respect to the guide line L1. Therefore, even if the box portion 20 enters an area adjacent to the sewing machine foot 200, the two do not interfere with each other. Therefore, the formation of the linear perforation F1 continues even in the area adjacent to the box portion 20.

[0065] In this way, the article 100 has perforations F1 formed parallel to a first imaginary line G1 based on direct contact between two or more fastener elements 4 included in the plurality of fastener elements 4 and the sewing machine foot 200 of the perforation machine 900, and the perforations F1 are also formed parallel to the guide surface 11 of the plastic member 8a arranged on the same straight line as the first imaginary line G1. In other words, the article 100 has perforations F1 formed parallel to the guide line L1 that is on the same straight line in the front-to-back direction as the side surfaces 44 of the plurality of fastener elements 4 when the slide fastener is viewed from the front. The perforations F1 can be formed completely linearly without any bending, curving, or meandering over the entire length of the slide fastener 1. In particular, the conventional perforations curved or meandered in the area adjacent to the stop to prevent the sewing machine foot from colliding with the stop, but this has been improved.

[0066] The left-side fastener stringer 5 can be sewn to the fabric 102 in advance using a sewing machine 900, as shown in Figure 13. At this time, the insert pin 50 is not inserted into the box portion 20, so even if the second side surface 22 of the box portion 20 is positioned farther from the center line CL than the guide line L2, the sewing machine foot 200 will not interfere with the left portion of the box portion 20. The insert pin 50 includes a flat or smooth surface that extends in the same straight line as the guide line L2, and optionally has a curved surface 52a. Therefore, the insert pin 50 will not interfere with the sewing machine foot 200, and even if it does, it will only slightly interfere.

[0067] Instead of sewing the right fastener stringer 2 to the fabric 101 with the left fastener stringer 5 connected to the right fastener stringer 2, the left fastener stringer 5 can be separated and sewn to the fabric 101 (see FIG. 14). The right fastener stringer 2 can be sewn to the fabric 101 and the left fastener stringer 5 can be sewn to the fabric 102 simultaneously (see FIG. 15).

[0068] The stop (or, more simply, the rear stop) provided in the slide fastener 1 is not limited to a separable stop 8 constructed by combining plastic members 8a and 8b, but may also be an inseparable stop 8' as shown in FIG. 16 . The inseparable stop 8' includes the first side surface 21' as the aforementioned guide surface 11, and therefore achieves the same effect as described above. The separable stop 8 has thinner portions (e.g., flanges 28, 29) than the inseparable stop 8', which may result in relatively lower mechanical strength. To address this issue, as can be seen in FIG. 6 , when the insert pin 50 is inserted into the box portion 20 and the slider 9 advances to a position separated from the box body 10 and insert pin 50, the insert pin 50 can contact both the flanges 28, 29 and the box pin 30 and be held between them. This ensures sufficient mechanical strength of the stop 8 when the insert pin 50 and the box body 10 are connected. By making the separable fastener 8 from resin, the insert pin 50 and the box body 10 can be precisely shaped for the above-mentioned purpose.

[0069] The fastener elements 4, 7 provided on the fastener stringers 2, 5 may be provided as individual independent islands in the longitudinal direction of the fastener stringers 2, 5, or may be provided as a continuous series of fastener elements 4, 7 in the longitudinal direction of the fastener stringers 2, 5. In FIG. 17 , the fastener elements are provided as a series of individual spiral units 4' of helical monofilaments on which engaging heads 43' are formed at a predetermined pitch. The spiral unit 4' has an upper leg 46 extending inward from the upper end of the engaging head 43' extending in the vertical direction, a lower leg (not shown) extending inward from the lower end of the engaging head 43', and an inverted portion 47 connecting the upper leg 46 and the lower leg between adjacent spiral units 4'. A guide line L1' is defined based on the contact between the inverted portions 47 of spiral units 4' adjacent in the longitudinal direction of the fastener stringers 2', 5' and the sewing machine foot 200. The box body 10 of the fastener 8 includes the guide surface 11 in the same manner as described above, and therefore the same effect as described above can be obtained.

[0070] In light of the above teachings, those skilled in the art can make various modifications to each embodiment and each feature. The reference numerals in the claims are for reference purposes only and should not be used to limit the scope of the claims. To be clear, a fastener stringer sewn to a fabric may be (i) sewn to a fabric in a state where a pair of separate fastener stringers are connected, or (ii) sewn to a fabric in a single-stringer state where a pair of separate fastener stringers are separated. The linear feeding of the fastener stringer 2 based on direct contact between two or more fastener elements 4 and the sewing machine foot 200 and the linear feeding of the fastener stringer 2 based on direct contact between the plastic member 8a and the sewing machine foot 200 may be performed in this order or the reverse order.

[0071] 1: Slide fastener 2: Fastener stringer 3: Fastener tape 3c: Core string 4: Fastener element 5: Fastener stringer 6: Fastener tape 6c: Core string 7: Fastener element 8: Stopper 9: Slider 10: Box body 11: Guide surface 20: Box portion 21: First side 22: Second side 30: Box pin 31: First side 32: Second side 50: Insert pin 100: Article 101: Fabric 102: Fabric 200: Sewing machine foot 900: Sewing machine C1: Center line CL: Center line D1: First distance D2: Second distance F1: Perforation F2: Planned sewing line L1: Guide line L2: Guide line R200: Area

Claims

1. A method for sewing a fastener stringer (2) to a fabric (101) using a sewing machine (900) with a sewing machine foot (200), the fastener stringer (2) having a plurality of fastener elements (4) individually or in series provided on longitudinal side edges of the fastener tape (3) in the longitudinal direction of the fastener tape (3), and a plastic member (10) positioned adjacent to a fastener element (4) located at the end of the plurality of fastener elements (4) in the longitudinal direction of the fastener tape (3) to prevent a slider from falling off, linearly conveying the fastener stringer (2) based on direct contact between the sewing machine foot (200) and two or more fastener elements (4) included in the plurality of fastener elements (4) and positioned adjacent to the sewing machine foot (200); Sewing the fastener tape (3) and the fabric (101) along a second imaginary line (G2) parallel to a first imaginary line (G1) determined by direct contact between the two or more fastener elements (4) and the sewing machine foot (200); linearly conveying the fastener stringer (2) based on direct contact between the plastic member (10) and the sewing machine foot (200); and and sewing the fastener tape (3) and the fabric (101) together along a fourth imaginary line (G4) parallel to a third imaginary line (G3) determined by direct contact between the plastic member (10) and the sewing machine foot (200), linearly conveying the fastener stringer (2) based on direct contact between the two or more fastener elements (4) and the sewing machine foot (200), and linearly conveying the fastener stringer (2) based on direct contact between the plastic member (10) and the sewing machine foot (200), in this order or in the reverse order; The plastic member (10) has a guide surface (11) with which the sewing machine foot (200) comes into contact so that the first and third imaginary lines (G1, G3) extend in the same straight line to form one guide line (L1), and the second and fourth imaginary lines (G2, G4) extend in the same straight line to form one planned sewing line (F2).

2. The plastic member (10) is a separable fastener box, The box body includes a box pin (30) positioned adjacent to the fastener element (4) located at the end and inserted into the slider, and a box portion (20) having one or more stop surfaces (16, 17) to which the box pin (30) is coupled and which stop the slider, 2. The method according to claim 1, wherein the guide surface (11) includes one or more first guide areas formed on the box pin (30) and at least one second guide area formed on the box part (20), the at least one second guide area being formed to be flush with the one or more first guide areas.

3. 3. The method according to claim 2, wherein the box pin (30) has two flat surfaces (31 a, 31 c) arranged in the same straight line as the guide line (L1) and a concave surface (31 b) formed between the flat surfaces (31 a, 31 c).

4. 4. The method according to claim 3, wherein the length of the concave surface (31b) along the guide line (L1) is greater than the total length of the two flat surfaces (31a, 31c) along the guide line (L1).

5. The method according to any one of claims 2 to 4, wherein opposing surfaces of the insert pin (50) inserted into the receiving space of the box part (20) and the box pin (30) are at least partially shaped complementarily.

6. The side edge portion of the fastener tape (3) includes at least one core cord (3c) to which each fastener element (4) of the plurality of fastener elements (4) is fixed and to which the box pin (30) and the box portion (20) are fixed, The box portion (20) has a first side surface (21) between which the core string (3c) is positioned and a first inner surface (23), and the first inner surface (23) partially defines a receiving space for the insert pin (50); 5. The method according to claim 2, wherein in the width direction of the fastener tape (3), the minimum distance between the center of the core cord (3c) and the first side surface (21) is smaller than the minimum distance between the center of the core cord (3c) and the first inner surface (23).

7. 7. The method according to claim 6, wherein 1.2<(T / S)<1.6 is satisfied, where S represents the minimum distance between the center of the core cord (3c) and the first side surface (21), and T represents the minimum distance between the center of the core cord (3c) and the first inner surface (23).

8. The box portion (20) has a first side surface (21) and a second side surface (22) provided on the opposite side of the first side surface (21), and the width (W20) of the box portion (20) is defined by the first side surface (21) and the second side surface (22), (i) a center line (C1) located at the center of the width (W20) of the box portion (20) defined by the first side surface (21) and the second side surface (22) is located away from the fastener tape (3) to a position where it does not intersect with the box pin (30), and / or is located away from the fastener tape (3) more than the center line (CL) of a slide fastener (1) including the fastener stringer (2) as a first fastener stringer (2); and / or (ii) The method according to any one of claims 2 to 4, wherein the first side (21) is located a first distance away from a center line (CL) of a slide fastener (1) including the fastener stringer (2) as a first fastener stringer (2), and the second side (22) is located a second distance away from the center line (CL) of the slide fastener (1), and the first distance is smaller than the second distance.

9. 9. The method of claim 8, wherein (ii) is satisfied: A method in which 1.1<(D2 / D1)<1.5 is satisfied, where D1 means the first distance and D2 means the second distance.

10. 5. The method according to any one of claims 1 to 4, wherein the guide surface (11) is included in an inclined surface that slopes outward relative to the fastener tape (3) as it moves away from the tape surface of the fastener tape (3).

11. An article (100) to which a slide fastener (1) is sewn, The slide fastener (1) comprises first and second fastener stringers (2, 5) and a slider (9) that moves in a forward and backward direction to couple and uncouple the first and second fastener stringers (2, 5), The first fastener stringer (2) comprises a first fastener tape (3), a plurality of first fastener elements (4) individually or serially provided on the longitudinal side edges of the first fastener tape (3) extending in the front-to-rear direction, and a plastic member (10) positioned adjacent to a first fastener element (4) positioned at the end of the plurality of first fastener elements (4) in the front-to-rear direction to prevent a slider from falling off, and each first fastener element (4) included in the plurality of first fastener elements (4) faces inward with respect to the first fastener tape (3) and includes a surface (44) included in a first imaginary line (G1) extending in the front-to-rear direction, The plastic member (10) is a separable fastener box, The box body includes a box pin (30) positioned adjacent to the fastener element (4) located at the end and inserted into the slider, and a box portion (20) having one or more restraining surfaces to which the box pin (30) is coupled and which restrain the slider, The article (100) has a perforation (F1) formed parallel to the first imaginary line (G1), and the perforation (F1) is also formed parallel to a guide surface (11) of the plastic member (10) arranged on the same straight line as the first imaginary line (G1).

12. The article according to claim 11, wherein the width of the first fastener tape (3) exposed on the front side of the article (100) is in the range of 0 mm to 1.5 mm.

13. A slide fastener (1) comprising first and second fastener stringers (2, 5) and a slider (9) that moves in a forward and backward direction to couple and uncouple the first and second fastener stringers (2, 5), The first fastener stringer (2) comprises a first fastener tape (3), a plurality of first fastener elements (4) individually or serially provided on the longitudinal side edges of the first fastener tape (3) extending in the front-to-rear direction, and a plastic member (10) positioned adjacent to a first fastener element (4) positioned at the end of the plurality of first fastener elements (4) in the front-to-rear direction to prevent a slider from falling off, and each first fastener element (4) included in the plurality of first fastener elements (4) faces inward with respect to the first fastener tape (3) and includes a surface (44) included in a first imaginary line (G1) extending in the front-to-rear direction, The plastic member (10) is a separable fastener box, The box body includes a box pin (30) positioned adjacent to the fastener element (4) located at the end and inserted into the slider, and a box portion (20) having one or more restraining surfaces to which the box pin (30) is coupled and which restrain the slider, The box body has a guide surface (11) arranged on the same straight line as the first imaginary line (G1).

14. 14. A slide fastener according to claim 13, wherein only a single gate mark is formed on the surface of said plastic member (10).

15. The box portion (20) has a first side surface (21) and a second side surface (22) provided on the opposite side of the first side surface (21), and the width (W20) of the box portion (20) is defined by the first side surface (21) and the second side surface (22), (i) a center line (C1) located at the center of the width (W20) of the box portion (20) defined by the first side surface (21) and the second side surface (22) is located away from the first fastener tape (3) to a position where it does not intersect with the box pin (30), and / or is located away from the first fastener tape (3) more than the center line (CL) of the slide fastener (1); and / or (ii) The slide fastener according to claim 13, wherein the first side (21) is located a first distance away from the center line (CL) of the slide fastener (1), and the second side (22) is located a second distance away from the center line (CL) of the slide fastener (1), and the first distance is smaller than the second distance.

16. 16. A slide fastener according to claim 15, wherein the condition (ii) is satisfied, A slide fastener satisfying 1.1<(D2 / D1)<1.5, wherein D1 means the first distance and D2 means the second distance.