Slide fastener

Abstract

In the present invention, in at least a section of a movable range (R5) of a slider (5), a slider upper section (5A) is positioned adjacent to wall upper sections (14A, 24A), and a slider lower section (5B) is positioned adjacent to wall lower sections (14B, 24B). The slider (5) is prevented from being caught on fabric, on both sides of tape upper / lower surfaces (11, 12, 21, 22).

Description

[Technical field]

[0001] The present disclosure relates to a slide fastener. [Background technology]

[0002] Patent Document 1 discloses that a protrusion is provided on the back surface of a fastener tape to prevent the slider from biting into the lining. Examples of methods for forming the protrusion include sewing or bonding a string or linear synthetic resin, and linear heat welding of synthetic resin. Figure 3 of the same document also shows a form in which the protrusion is formed by partially overlapping the fastener tape.

[0003] Patent Document 2 discloses providing a V- or U-shaped recess in the slider to prevent the dough from getting caught.

[0004] Although unrelated to the issue of fabric getting caught, Patent Document 3 discloses inserting a "plastically deformable" core material into the hollow woven portion to improve the shape retention of the slide fastener (see claim 10, paragraph 0015, Figure 3, etc.). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Utility Model Application Publication No. 60-105409 [Patent Document 2] JP 2005-160785 A [Patent Document 3] Patent No. 5403639 Summary of the Invention [Problem to be solved by the invention]

[0006] When the protrusions are provided only on the back side of the fastener tape as described in Patent Document 1, there is a risk that when the slide fastener is deformed, such as bent or twisted, the protrusions are also deformed and it is not possible to prevent the fabric from being caught. In order to address this issue, it is assumed that the rigidity of the protrusions is increased, but this is not a realistic solution because the protrusions become bulky on the back side of the fastener tape beyond the allowable range. In addition, even if the protrusions are provided on the back side of the fastener tape as described in Patent Document 1, it is not possible to prevent the slider from catching the fabric on the front side of the fastener tape.

[0007] The present inventors have found a new problem of preventing the slider from biting the fabric on both sides of the fastener tape while suppressing the bulkiness of the wall portion for preventing the slider from biting the fabric. [Means for solving the problem]

[0008] A slide fastener according to one embodiment of the present disclosure includes a pair of fastener stringers in which fastener elements are provided on one side edge of a fastener tape whose thickness is determined by the upper and lower surfaces of the tape, and a slider that is moved to open and close the pair of fastener stringers, the slider having a slider upper part provided on the same side as the upper surface of the tape, a slider lower part provided on the same side as the lower surface of the tape, and a connecting part connecting the slider upper part and the slider lower part. At least one of the fastener tapes has a wall part for preventing the fabric from being caught, which is provided with a gap between it and the fastener element. The wall part includes a wall part upper part provided on the same side as the upper surface of the tape and protruding from the upper surface of the tape, and a wall part lower part provided on the same side as the lower surface of the tape and protruding from the lower surface of the tape. In order to prevent the slider from catching the fabric on both the upper and lower surfaces of the tape, the slider upper part is positioned adjacent to the wall part upper part, and the slider lower part is positioned adjacent to the wall part lower part in at least a part of the movable range of the slider.

[0009] In some embodiments, the upper wall portion is disposed in at least partial contact with the upper slider portion and / or the lower wall portion is disposed in at least partial contact with the lower slider portion.

[0010] In some embodiments, the distance between the top of the slider and the wall is less than or equal to 1x the width of the fastener element in the same direction as the distance; and / or the distance between the bottom of the slider and the wall is less than or equal to 1x the width of the fastener element in the same direction as the distance.

[0011] In some embodiments, the slider has an insertion slit for inserting the fastener tape, which is defined by opposing portions of the slider upper and lower parts, and the upper and lower thicknesses of the wall are 0.75 times or more and 5 times or less than the upper and lower widths of the insertion slit.

[0012] In some embodiments, the vertical thickness of the wall portion is at least 1 time and at most 5 times the vertical width of the insertion slit.

[0013] In some embodiments, the wall portion has flexibility. In some embodiments, the wall portion includes a pouch-like structure of the fastener tape and a core material enclosed in the pouch-like structure. In some embodiments, the core material has flexibility. In some embodiments, the thickness of the warp threads constituting the pouch-like structure is larger than the thickness of the weft threads of the fastener tape.

[0014] In some embodiments, the wall comprises a plastic or metal portion attached to the fastener tape.

[0015] In some embodiments, the slider includes a slider body including an upper wing and a lower wing arranged opposite to each other, and a connecting pole connecting the upper wing and the lower wing, and the front end of each of the upper wing and the lower wing is adapted to move in the direction of the slider body. Towards It has left and right shoulders extending in perpendicular left and right directions, and a concave central portion recessed rearward between the left and right shoulders.

[0016] In some embodiments, the upper wing has a flange portion protruding toward the lower wing so as to define an insertion slit for the fastener tape, and the front end of the flange portion is joined to the front end of the upper wing. Effect of the Invention

[0017] According to one aspect of the present disclosure, it is possible to prevent the slider from biting the fabric on both sides of the fastener tape while suppressing the bulkiness of the wall portion for preventing the slider from biting the fabric. [Brief description of the drawings]

[0018] [Figure 1] 1 is a schematic top view of a closed slide fastener according to one embodiment of the present disclosure. FIG. [Diagram 2] 2 is a schematic cross-sectional view of the slide fastener shown in FIG. 1, in which the slider is shown from behind. [Diagram 3] FIG. 2 is a side view of a slider according to one aspect of the present disclosure. [Figure 4] FIG. 4 is a front view of the slider shown in FIG. [Diagram 5] FIG. 4 is a rear view of the slider shown in FIG. [Figure 6] FIG. 4 is a cross-sectional view of the slider shown in FIG. 3, showing the inner surface of the upper blade. [Figure 7] FIG. 2 is a schematic diagram showing a general configuration of a wall portion according to one embodiment of the present disclosure. [Figure 8] 13 is a schematic partial top view of a slide fastener according to another embodiment of the present disclosure. FIG. [Figure 9] 9 is a schematic cross-sectional view of the slide fastener shown in FIG. 8. [Figure 10] 13 is a schematic diagram showing a general configuration of a slider according to another embodiment of the present disclosure, in which a cover that can be separated into upper and lower parts is attached to a slider body. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Various embodiments and features will be described below with reference to Figs. 1 to 10. Those skilled in the art can combine the embodiments and / or features without excessive explanation, and can understand the synergistic effect of this combination. In principle, overlapping explanations between embodiments will be omitted. The reference drawings are primarily intended to describe the invention, and are simplified for the convenience of drawing. Each feature is not only effective for the slide fastener disclosed in this application, but is understood as a universal feature that is also applicable to various other slide fasteners not disclosed in this specification.

[0020] The slide fastener 1 is a long strip having a long direction, a short direction, and a thickness direction. The slide fastener 1 includes a pair of fastener stringers 2, 4, and a slider 5 that is moved to open and close the pair of fastener stringers 2, 4. The fastener stringer 2 is provided with a fastener element 30 on one side edge 13 along the long direction of a long strip-like fastener tape 10. Similarly, the fastener stringer 4 is provided with a fastener element 40 on one side edge 23 along the long direction of a long strip-like fastener tape 20. The slider 5 is slidably engaged with the fastener elements 30 and 40. The forward movement of the slider 5 closes the pair of fastener stringers 2, 4 (the fastener elements 30, 40 are in an interlocking state), and the backward movement of the slider 5 opens the pair of fastener stringers 2, 4 (the interlocking state of the fastener elements 30, 40 is released).

[0021] In this specification, the up-down direction is equal to the thickness direction of the slide fastener 1. The front-rear direction is perpendicular to the up-down direction and equal to the longitudinal direction of the slide fastener 1 and the moving direction of the slider 5. The left-right direction is perpendicular to the up-down direction and the front-rear direction and equal to the short side direction of the slide fastener 1.

[0022] The fastener tapes 10, 20 are, for example, woven fabrics, knitted fabrics, or a mixture of these, and are long, strip-shaped flexible fabrics. The fastener tapes 10, 20 are made of a plurality of tape structures. When the fastener tapes 10, 20 are woven fabrics, a tape structure such as plain weave, twill weave, warp rib weave, or hollow weave is formed from a plurality of warp threads and one or a plurality of weft threads. When the fastener tapes 10, 20 are knitted fabrics, the tape structure is formed by a warp knit structure such as chain knit, tricot knit, or satin knit. If necessary, a core cord is provided on one side edge portion 13, 23 along the longitudinal direction of the fastener tapes 10, 20, for example, to increase the attachment strength of the fastener elements 30, 40 to the fastener tapes 10, 20. The tape structure, structure, and thickness of the fastener tapes are determined in various ways by those skilled in the art.

[0023] The thickness of the fastener tape 10 is determined by the distance between the upper tape surface 11 and the lower tape surface 12 shown in Fig. 2. The thickness of the fastener tape 20 is determined by the distance between the upper tape surface 21 and the lower tape surface 22 shown in Fig. 2.

[0024] The slider 5 has a slider upper portion 5A provided on the same side as the tape upper surfaces 11, 21 of the fastener tapes 10, 20, a slider lower portion 5B provided on the same side as the tape lower surfaces 12, 22 of the fastener tapes 10, 20, and a connecting portion 5C connecting the slider upper portion 5A and the slider lower portion 5B. The slider 5 further has insertion slits S1, S2 for inserting the fastener tapes 10, 20, which are defined by opposing portions of the slider upper portion 5A and the slider lower portion 5B. The vertical width (slit width) of the insertion slits S1, S2 is equal to the distance between the portion (e.g., flange portion) of the slider upper portion 5A that defines the insertion slits S1, S2 and the portion (e.g., flange portion) of the slider lower portion 5B. Typically, the vertical width (slit width) of the insertion slits S1, S2 is larger than the vertical thickness of the portion of the fastener tapes 10, 20 placed in the insertion slits S1, S2, but is not limited thereto. The opposing portions of the slider upper portion 5A and the slider lower portion 5B that define the insertion slits S1, S2 can come into contact with the upper surfaces 11, 21 or the lower surfaces 12, 22 of the fastener tapes 10, 20 when the slider 5 moves forward or backward.

[0025] For example, as shown in Fig. 2 to Fig. 6, the slider 5 is composed of a single slider body 5j (with a pull tab 6 attached thereto as an option). The slider body 5j has an upper wing 51 and a lower wing 52 arranged opposite to each other vertically, a connecting post 53 connecting the upper wing 51 and the lower wing 52, a pull tab mounting post 54 provided on the upper wing 51, and a pull tab mounting post 55 provided on the lower wing 52. The slider upper part 5A is composed of the upper wing 51 and the pull tab mounting post 54. The slider lower part 5B is composed of the lower wing 52 and the pull tab mounting post 55. The connecting part 5C is composed of the connecting post 53. Note that Figs. 3 to 5 show the state before the pull tab mounting posts 54, 55 are plastically deformed.

[0026] A Y-shaped element passage is formed in the slider body 5j, which is branched by the connecting column 53. A pair of front openings 58A, 58B are provided on the left and right sides of the connecting column 53. A single rear opening 59 is provided on the opposite side of the front openings 58A, 58B. The front openings 58A, 58B are arranged in the direction of movement of the slider body 5j. TowardsThe fastener elements 30, 40 are arranged on either side of the connecting post 53 in the orthogonal left-right direction. The uncoupled fastener elements 30, 40 move between the inside and outside of the slider body 5j through the front openings 58A, 58B. The coupled fastener elements 30, 40 move between the inside and outside of the slider body 5j through the rear opening 59.

[0027] The upper wing 51 has flanges 56p, 56q protruding toward the lower wing 52 to define the insertion slits S1, S2 of the fastener tapes 10, 20. Similarly, the lower wing 52 has flanges 57p, 57q protruding toward the upper wing 51 to define the insertion slits S1, S2 of the fastener tapes 10, 20. The insertion slits S1, S2 extend in the front-rear direction to communicate the front opening 58A or 58B with the rear opening 59. A passage space for the left and right fastener elements 30, 40 is provided between the flanges 56p, 56q and the connecting column 53. In the range behind the connecting column 53, a passage space for the joined left and right fastener elements 30, 40 is provided between the flanges 56p, 56q. In the illustrated example, the protruding height of the flanges 56p, 56q is greater than the protruding height of the flanges 57p, 57q, but it is also assumed that the two are equal.

[0028] The insertion slit S1 has a slit width S10 corresponding to the distance between the flange portion 56p of the upper wing 51 and the flange portion 57p of the lower wing 52 of the slider 5. When the slider 5 does not have a flange portion, the slit width S10 corresponds to the distance between the slider upper portion 5A and the slider lower portion 5B in the portion where the fastener tape 10 of the slider 5 is inserted. Similarly, the insertion slit S2 has a slit width S20 corresponding to the distance between the flange portion 56q of the upper wing 51 and the flange portion 57q of the lower wing 52 of the slider 5. When the slider 5 does not have a flange portion, the slit width S20 corresponds to the distance between the slider upper portion 5A and the slider lower portion 5B in the portion where the fastener tape 20 of the slider 5 is inserted. For example, the slit widths S10 and S20 are greater than the minimum tape thickness of the fastener tapes 10 and 20.

[0029] In this embodiment, the fastener tape 10 has a wall portion 14 spaced apart from the fastener element 30. Similarly, the fastener tape 20 has a wall portion 24 spaced apart from the fastener element 40. The above-mentioned space, i.e., the distance from the end of the fastener element 30 on the wall portion 14 side to the end of the fastener element 30 on the wall portion 14 side, is equal to or less than the width of the fastener element 30 in the left-right direction. The thickness of the wall portion 14 is greater than the tape thickness of the other parts of the fastener tape 10. The thickness of the wall portion 24 is greater than the tape thickness of the other parts of the fastener tape 20. The wall portions 14, 24 have wall portion upper portions 14A, 24A protruding from the tape upper surfaces 11, 21 toward the thickness direction of the fastener tape 10, 20, and wall portion lower portions 14B, 24B protruding from the tape lower surfaces 12, 22 toward the thickness direction of the fastener tape 10, 20. The wall portions 14, 24 are for preventing the fabric from being caught.

[0030] The vertical thickness of the wall portions 14, 24 may be 0.75 times or more and 5 times or less than the vertical width of the insertion slits S1, S2 (slit widths S10, S20). Preferably, the vertical thickness of the wall portions 14, 24 is greater than the slit widths S10, S20. That is, the vertical thickness of the wall portions 14, 24 is 1 time or more and 5 times or less than the vertical width of the insertion slits S1, S2 (slit widths S10, S20). By doing so, the effect of preventing the fabric from being caught is further enhanced. More preferably, the vertical thickness of the wall portions 14, 24 is twice the vertical width of the insertion slits S1, S2 (slit widths S10, S20). By doing so, the effect of preventing the fabric from being caught can be enhanced without changing the sliding property of the slider 5.

[0031] As shown in FIG. 2, the wall portion 14, 24 includes the sac-shaped structure 15, 25 of the fastener tape 10, 20 and the core material 16, 26 enclosed in the sac-shaped structure 15, 25. FIG. 7 is a schematic cross-sectional view of the fastener tape 10, 20, showing the state of a plurality of warp threads for one weft thread. The sac-shaped structure 15, 25 includes a plurality of warp threads 93 for one weft thread. The warp threads 93 are arranged so as to surround the periphery of the core material 16, 26. The sac-shaped structure 15, 25 is made of a sac weave. Note that a method for forming a sac weave is known to those skilled in the art, and a detailed description thereof will be omitted. The wall portion 14, 24 is made of a sac and a warp thread like the other parts of the fastener tape 10, 20, so that the wall portion 14, 24 is suppressed from being noticeable when the tape upper surface 11, 21 and the tape lower surface 12, 22 are visually observed.

[0032] Since the walls 14, 24 are formed at the same time as the fastener tapes 10, 20 are woven, the walls 14, 24 can be accurately positioned, and an additional step of attaching the walls 14, 24 to the fastener tapes 10, 20 can be omitted. Furthermore, there is no risk that the walls 14, 24 will fall off the fastener tapes 10, 20.

[0033] The walls 14, 24 are preferably flexible. In this case, even when the slider 5 contacts and slides against the walls 14, 24, the slider 5 is not subjected to all stress from the walls 14, 24, so that the jamming prevention function can be obtained without sacrificing the sliding properties. In addition, wear of the walls 14, 24 due to the contact of the slider 5 with the walls 14, 24 is avoided or suppressed.

[0034] The thickness of the warp threads 93 constituting the sac-shaped structure 15, 25 of the wall portion 14, 24 is larger than the thickness of the warp threads 91 constituting the other portions. The thickness of the warp threads 93 constituting the sac-shaped structure 15, 25 of the wall portion 14, 24 is larger than the thickness of the weft threads, for example, three times or more. The core material 16, 26 of the wall portion 14, 24 is a knit cord, which is made by bundling multiple threads and covering the periphery with skin threads. This core material 16, 26 is stronger than the core cord provided at one side edge portion 13, 23 along the longitudinal direction of the fastener tape 10, 20. The core cord is a twisted cord, which is made by bundling and twisting multiple threads. The core cord is capable of a certain degree of shrinkage. The warp threads woven around this core cord are the same as the weft threads and have the same thickness. In the above description, the thickness of the warp threads used in the walls 14, 24 is three times or more the thickness of the weft threads, but this is not limited to this. If the core cords forming the walls are made thicker, the thickness of the warp threads used in the walls may be the same as the weft threads. In addition, although the core materials 16, 26 are described as being knitted cords, this is not limiting and they may be metal wires or resin wires.

[0035] The fastener elements 30, 40 are, for example, coil elements formed by helically winding monofilaments, but may also be an arrangement of metal or plastic elements. The fastener elements 30, 40 can be attached to the fastener tapes 10, 20 by crimping, injection molding, or sewing, depending on the type. It is also possible for the fastener elements 30, 40 to be woven together into the tape structure of the fastener tapes 10, 20.

[0036] The rear stop 7 may be attached so as to cover the left and right fastener elements 30, 40. The front stop 8 may be attached to the fastener element 30. The front stop 9 may be attached to the fastener element 40. The rear stop 7, the front stop 8, and the front stop 9 may be attached so as to cover not only the fastener elements but also at least a part of the wall portions 14, 28.

[0037] For example, the tape upper surfaces 11, 21 may be located on the front side of the garment to which the slide fastener 1 is sewn, and the tape lower surfaces 12, 22 may be located on the back side of the garment, but the relationship between the two may be reversed. On the back side of the garment, it is impossible to confirm whether the fabric of the garment is on the path of the slider 5. Therefore, there is a high possibility that the fabric will be caught by the slider 5. However, when operating the slider 5, the slider 5 and its surroundings are not necessarily observed and the slider 5 is not necessarily moved. In other words, even on the front side of the garment, the fabric of the garment may be caught by the slider 5. It is assumed that the thinner the fabric of the garment, the more likely it is to be caught by the slider 5. The slide fastener 1 is used not only for garments, but also for opening and closing tents and sleeping bags. A sleeping bag is constructed by filling a heat storage material in a bag made of thin fabric. It is assumed that the slider 5 will be operated only by hand without being visually observed, and the slide fastener 1 according to the present disclosure is preferably used.

[0038] The range between the rear stop 7 and the front stop 8, 9 in the slide fastener 1 is defined as the movable range R5 of the slider 5 (see FIG. 1). In at least a part or the entire movable range R5 of the slider 5, the slider upper part 5A is positioned adjacent to the wall upper part 14A, 24A, and the slider lower part 5B is positioned adjacent to the wall lower part 14B, 24B, so that the slider 5 can be prevented from biting into the fabric on both sides of the tape upper and lower surfaces 11, 12, 21, 22. In particular, the solid parts (solid parts) of the walls 14, 24 necessary for ensuring the rigidity of the walls 14, 24 can be individually assigned to the upper and lower surfaces of the tape. Therefore, the slider 5 can be prevented from biting into the fabric on both sides of the fastener tape 10, 20 while suppressing the bulkiness of the walls 14, 24. The movable range R5 of the slider 5 is typically the range between the rear stop 7 and the front stop 8, 9, but in some cases, one or both of the stoppers are omitted.

[0039] In some cases, the distance between the slider upper part 5A and the wall part 14 is 0 times or more and 1 times or less than the width of the fastener elements 30, 40 in the same direction as the distance (i.e., the left-right direction); and / or the distance between the slider lower part 5B and the wall part 14 is 0 times or more and 1 times or less than the width of the fastener elements 30, 40 in the same direction as the distance (i.e., the left-right direction). When the above-mentioned width is 0 times, the slider upper part 5A and the wall part 14 are in contact with each other. The same applies to the relationship between the slider lower part 5B and the wall part 14.

[0040] Although not necessarily limited to this, the wall upper parts 14A, 24A are provided in contact with the slider upper part 5A, and / or the wall lower parts 14B, 24B are provided in contact with the slider lower part 5B. In the flat state shown in FIG. 1 in which the slide fastener 1 is neither bent nor twisted, the walls 14, 24 come into contact with the slider 5. This more effectively prevents fabric from being arranged in front of the front openings 58A, 58B of the slider 5, fabric from being arranged behind the rear opening 59 of the slider 5, and fabric from being arranged near the insertion slits S1, S2 of the slider 5.

[0041] The contact between the upper wall portions 14A, 24A and the upper slider portion 5A, and the contact between the lower wall portions 14B, 24B and the lower slider portion 5B will be described in detail. As shown in FIG. 2, it is preferable that the upper wall portions 14A, 24A contact at least the side surface around the rear end of the upper slider portion 5A. It is preferable that the lower wall portions 14B, 24B contact at least the side surface around the rear end of the lower slider portion 5B. This is particularly preferable when jamming is expected during the lowering operation of the slider.

[0042] It is preferable that the upper wall portions 14A and 24A contact at least the side surface of the slider upper portion 5A around the front opening end. It is preferable that the lower wall portions 14B and 24B contact at least the side surface of the slider lower portion 5B around the front opening end. This is particularly preferable when it is expected that the slider may get caught during the lifting operation.

[0043] More preferably, as shown in Fig. 1, the upper wall portions 14A and 24A contact almost the entire side surface of the slider upper portion 5A from the rear opening side to the front opening side, and the lower wall portions 14B and 24B contact almost the entire side surface of the slider lower portion 5B from the rear opening side to the front opening side.

[0044] Furthermore, when the surfaces of the upper wall portions 14A, 24A are curved, it is preferable that the corners of the flanges of the slider upper portion 5A contact the curved surfaces of the upper wall portions 14A, 24A as shown in Fig. 2. When the surfaces of the lower wall portions 14B, 24B are curved, it is preferable that the corners of the flanges of the slider upper portion 5A contact the curved surfaces of the lower wall portions 14B, 24B.

[0045] Each of the above contact forms is independently distinguishable as an inventive concept, and even when combined with each other, they are distinguishable as different inventive concepts.

[0046] As shown in FIG. 6, the front end of the upper wing 51 has left and right shoulders 51p, 51q extending in the left-right direction and a concave central portion 51r recessed backward between the left and right shoulders 51p, 51q. Similarly, the front end of the lower wing 52 has left and right shoulders 52p, 52q extending in the left-right direction and a concave central portion 52r recessed backward between the left and right shoulders 52p, 52q. With this configuration, even if there is fabric in front of the slider 5, the fabric is guided to the concave central portions 51r, 52r when the slider 5 advances, and is less likely to be caught by the slider 5. In other words, the risk of the fabric getting caught in the gap between the periphery of the element and the slider can be reduced. Preferably, the left and right shoulders are straight portions extending linearly in the left-right direction.

[0047] As a further option, the front ends of the flanges 56p, 56q are joined to the front end of the upper wing 51. When the left and right walls 14, 24 are provided as described below, the fabric is unlikely to reach the flanges 56p, 56q beyond the walls 14, 24 and be pinched between the fastener elements 30, 40 and the flanges 56p, 56q. The explanation given for the upper wing 51 also applies to the lower wing 52, and a duplicate explanation will be omitted.

[0048] The flange portions 56p, 56q have flange rear portions 56p1, 56q1 and flange inclined portions 56p2, 56q2 provided in front of the flange rear portions 56p1, 56q1. The flange rear portions 56p1, 56q1 extend parallel to the moving direction of the slider 5. The distance between the flange rear portions 56p1, 56q1 is constant in the front-rear direction. The flange inclined portions 56p2, 56q2 extend obliquely forward from the flange rear portions 56p1, 56q1. The distance between the flange inclined portions 56p2, 56q2 increases toward the front. In some cases, the angle θ between the flange rear portions 56p1, 56q1 and the flange inclined portions 56p2, 56q2 is 15° or more and 35° or less.

[0049] By providing the walls 14, 24 on each fastener tape 10, 20, it is possible to prevent the movement of the fabric in the direction toward the center line AX of the slide fastener 1 (see the arrow) in the left-right direction shown in Fig. 1. However, this cannot be done when there is fabric in front of the slider 5 between the fastener elements 30, 40. By providing the recessed central portions 51r, 52r at the front end of the slider 5 as described above, the fabric in front of the slider 5 is guided to the recessed central portions 51r, 52r when the slider 5 moves forward, and the fabric is prevented from getting between the slider 5 and the fastener elements, i.e., the fabric is prevented from being caught by the slider 5.

[0050] The walls 14, 24 may be integrally formed with the fastener tapes 10, 20 as shown in FIG. 2, or may be formed as separate bodies attached to the fastener tapes 10, 20. For example, a first core string may be sewn to the upper surface of the tape, and a second core string may be sewn to the lower surface of the tape, thereby forming a wall protruding in the vertical direction. Even in such a form, solid parts (solid parts) of the wall necessary to ensure the rigidity of the wall can be individually allocated to the upper and lower surfaces of the tape. Therefore, the bulkiness of the wall can be suppressed, and the fabric can be prevented from being caught by the slider 5 on both sides of the fastener tapes 10, 20.

[0051] FIG. 8 shows that the wall portion 14, 24 is divided into a plurality of island portions 14i, 24i. In this form, the same effect as in the above embodiment can be obtained. Each island portion 14i, 24i is long in the front-rear direction, but is not necessarily limited to this shape. The island portions 14i, 24i can be attached to the fastener tapes 10, 20 by crimping, injection molding, sewing, etc., as in the fastener elements 30, 40. As in the above case, each island portion 14i, 24i can include a pouch-shaped tissue 15, 25 and a core material 16, 26 sealed in the pouch-shaped tissue 15, 25. Needless to say, it is also possible to adopt an island portion made of metal or resin.

[0052] 9 shows a configuration in which the walls 14, 24 are made of resin or metal and are attached to the fastener tapes 10, 20 by injection molding or crimping. The materials of the walls 14, 24 can vary, and the use of a core material such as a string is not essential.

[0053] FIG. 10 shows a form in which the slider 5 is composed of a slider body 5j and a cover 5u attached thereto. The cover 5u is an add-on part attached to the slider body 5j to prevent the slider body 5j from biting into the fabric. The cover 5u is configured to prevent the slider 5 from biting into the fabric when the slider 5 advances (see FIG. 10) and / or to prevent the slider 5 from biting into the fabric when the slider 5 moves backward. The cover 5u is composed of, for example, an upper cover that covers the slider upper part 5A of the slider body 5j from above, a lower cover that covers the slider lower part 5B of the slider body 5j from below, and a connecting part that connects the upper cover and the lower cover. The upper and lower covers are connected by a method such as mechanical fitting at the connecting part, and the slider body 5j is accommodated in the cover 5u. The upper cover forms a part of the slider upper part 5A provided on the same side as the tape upper surfaces 11 and 21. The cover lower portion constitutes a part of the slider lower portion 5B provided on the same side as the tape lower surfaces 12, 22. The connecting portion connecting the cover upper portion and the cover lower portion constitutes a part of the connecting portion 5C connecting the slider upper portion 5A and the slider lower portion 5B.

[0054] In the case shown in FIG. 10, the cover 5u is configured to define a space for holding the slider body 5j, a left passage 81A for the left fastener element, and a right passage 81B for the right fastener element. The left passage 81A communicates with the left passage 71A of the connecting column 53 of the slider body 5j. The right passage 81B communicates with the right passage 71B of the connecting column 53 of the slider body 5j. The left and right side passages 71A and 71B of the slider body 5j communicate with the rear passage 71C of the connecting column 53 of the slider body 5j. Such a cover 5u is known to those skilled in the art as disclosed in WO 2016 / 035125 (incorporated herein by reference), and a detailed description thereof will be omitted.

[0055] The slider body 5j is a general-purpose slider, not a special / dedicated slider as shown in Figures 3 to 6. In this embodiment, as in the above-mentioned embodiment, in at least a part or the entire movable range R5 (Figure 1) of the slider 5, the upper part of the slider 5 (in short, the upper part of the cover 5u of the slider 5) is positioned adjacent to (for example, in contact with) the upper parts of the walls 14, 24, and the lower part of the slider 5 (in short, the lower part of the cover 5u of the slider 5) is positioned adjacent to (for example, in contact with) the lower parts of the walls 14, 24, so that the slider 5 can be prevented from pinching the fabric on both the upper and lower surfaces of the tape. Therefore, the same effect as in the above-mentioned embodiment can be obtained in this embodiment.

[0056] In light of the above teachings, those skilled in the art can make various modifications to each embodiment. The reference symbols in the claims are for reference only and should not be used to limit the scope of the claims. The use of the special / dedicated sliders shown in Figures 3 to 6 is not essential. The walls 14 and 24 are not limited to extending linearly, but may extend in a meandering or zigzag manner. [Explanation of symbols]

[0057] 1 Slide fastener 2 Zipper Stringer 4 Zipper Stringer 5. Slider 10 Zipper Tape 14 Wall 14A Upper wall 14B Lower wall 20 Zipper Tape 24 Wall 24A Upper wall 24B Lower wall 30 Fastener element 40 Fastener element

Claims

1. A pair of fastener stringers (2, 4) each having a fastener element (30, 40) provided on one side edge (13, 23) of a fastener tape (10, 20) whose tape thickness is defined by upper and lower tape surfaces (11, 12, 21, 22); A slide fastener (1) comprising a slider (5) which is moved to open and close the pair of fastener stringers (2, 4), the slider (5) comprising a slider upper part (5A) provided on the same side as the tape upper surface (11, 21), a slider lower part (5B) provided on the same side as the tape lower surface (12, 22), and a connecting part (5C) connecting the slider upper part (5A) and the slider lower part (5B), At least one of the fastener tapes (10, 20) has a flexible wall portion (14, 24) for preventing a fabric from being caught, the flexible wall portion (14, 24) being provided at a distance from the fastener element (30, 40), the wall portion (14, 24) being provided on the same side as the tape upper surface (11, 21) and including a wall portion upper portion (14A, 24A) protruding from the tape upper surface (11, 21) and a wall portion lower portion (14B, 24B) provided on the same side as the tape lower surface (12, 22) and protruding from the tape lower surface (12, 22); In order to prevent the slider (5) from pinching the fabric on both the upper and lower surfaces (11, 12, 21, 22) of the tape, in at least a part of the movable range (R5) of the slider (5), the slider upper part (5A) is positioned adjacent to and in contact with the wall upper part (14A, 24A), and the slider lower part (5B) is positioned adjacent to and in contact with the wall lower part (14B, 24B); The wall portion (14, 24) includes a pouch-shaped tissue (15, 25) of the fastener tape (10, 20) and a core material (16, 26) having flexibility that is sealed in the pouch-shaped tissue (15, 25) and gives bulk to the wall portion (14, 24), and the core material (16, 26) includes a flexible knit cord.

2. The slider (5) has insertion slits (S1, S2) for inserting the fastener tapes (10, 20), which are defined by opposing portions (56p, 56q) of the slider upper portion (5A) and the slider lower portion (5B), 2. The slide fastener according to claim 1, wherein the vertical thickness of the wall portions (14, 24) is 0.75 times or more and 5 times or less the vertical width of the insertion slits (S1, S2).

3. 3. The slide fastener according to claim 2, wherein the vertical thickness of said wall portions (14, 24) is at least 1 time and at most 5 times the vertical width of said insertion slits (S1, S2).

4. 4. The slide fastener according to claim 1, wherein the thickness of the warp threads constituting the pouch-shaped tissue (15, 25) is greater than the thickness of the weft threads of the fastener tapes (10, 20).

5. The slider (5) includes a slider body (5j) including an upper blade (51) and a lower blade (52) arranged opposite to each other, and a connecting column (53) connecting the upper blade (51) and the lower blade (52), A slide fastener as described in any one of claims 1 to 4, characterized in that the front end portions of each of the upper wing (51) and the lower wing (52) have left and right shoulder portions (51p, 51q, 52p, 52q) extending in a left-right direction perpendicular to the moving direction of the slider body (5j), and a concave central portion (51r, 52r) recessed rearward between the left and right shoulder portions (51p, 51q, 52p, 52q).

6. The slide fastener according to claim 5, characterized in that the upper wing (51) has flange portions (56p, 56q) protruding toward the lower wing (52) so as to define insertion slits (S1, S2) for the fastener tape (10, 20), and the front end portions of the flange portions (56p, 56q) are connected to the front end portion of the upper wing (51).

7. A slide fastener according to any one of claims 1 to 6, wherein at least the side of the rear end of the slider upper portion (5A) contacts the wall upper portion (14A, 24A) and / or at least the side of the rear end of the slider lower portion (5B) contacts the wall lower portion (14B, 24B).

8. 8. The slide fastener according to claim 1, wherein the thickness of the warp threads constituting the pouch-shaped tissue (15, 25) is three times or more the thickness of the weft threads of the fastener tape (10, 20).

9. 9. The slide fastener according to claim 1, wherein the knit cord includes a yarn bundle formed by bundling a plurality of yarns, and a sheath yarn covering the yarn bundle.

10. A slide fastener as described in any one of claims 1 to 9, wherein the slider upper part (5A) is capable of contacting the wall upper part (14A, 24A) and / or the slider lower part (5B) is capable of contacting the wall lower part (14B, 24B) throughout the entire movable range (R5) of the slider (5).

11. The slide fastener according to claim 10, wherein the movable range (R5) is defined between a rear stop and a front stop provided on the slide fastener (1).

12. a left fastener stringer (2) having a left fastener element (30) provided on a side edge portion (13) of a left fastener tape (10) whose tape thickness is defined by upper and lower tape surfaces (11, 12); a right fastener stringer (4) having a right fastener element (40) provided on a side edge portion (23) of a right fastener tape (20) whose tape thickness is defined by upper and lower tape surfaces (21, 22); A slide fastener (1) comprising a slider (5) which is moved to open and close the left and right fastener stringers (2, 4), the slider (5) comprising a slider upper part (5A) provided on the same side as the tape upper surface (11, 21), a slider lower part (5B) provided on the same side as the tape lower surface (12, 22), and a connecting part (5C) connecting the slider upper part (5A) and the slider lower part (5B), The left fastener tape (10) has a soft left wall portion (14) for preventing fabric from getting caught, which is spaced apart from the left fastener element (30), and the right fastener tape (20) has a soft right wall portion (24) for preventing fabric from getting caught, which is spaced apart from the right fastener element (40). Each of the left and right wall portions (14, 24) is provided on the same side as the tape upper surface (11, 21) and includes a wall portion upper portion (14A, 24A) protruding from the tape upper surface (11, 21), and a wall portion lower portion (14B, 24B) provided on the same side as the tape lower surface (12, 22) and protruding from the tape lower surface (12, 22). In order to prevent the slider (5) from pinching the fabric on both the upper and lower surfaces (11, 12, 21, 22) of the tape, in at least a part of the movable range (R5) of the slider (5), the slider upper part (5A) is positioned adjacent to and in contact with the wall upper parts (14A, 24A) of the left and right side wall parts (14, 24), and the slider lower part (5B) is positioned adjacent to and in contact with the wall lower parts (14B, 24B) of the left and right side wall parts (14, 24), The left side wall portion (14) includes a pouch-shaped tissue (15) of the left fastener tape (10) and a knitted cord that is enclosed in the pouch-shaped tissue (15) and has flexibility to give bulk to the left side wall portion (14), The right side wall portion (24) is a slide fastener including a pouch-shaped tissue (25) of the right fastener tape (20) and a knit cord that is sealed in the pouch-shaped tissue (25) and has flexibility to give bulk to the right side wall portion (24).

13. A slide fastener according to claim 12, wherein the thickness of the warp threads constituting the bag-shaped tissue (15) of the left side wall portion (14) is three or more times the thickness of the weft threads of the left side fastener tape (10), and the thickness of the warp threads constituting the bag-shaped tissue (25) of the right side wall portion (24) is three or more times the thickness of the weft threads of the right side fastener tape (20).

14. 14. The slide fastener according to claim 12, wherein the knit cord includes a yarn bundle formed by bundling a plurality of yarns, and a sheath yarn covering the yarn bundle.

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