CN106820474B

CN106820474B - Fastener stringer and slide fastener

Info

Publication number: CN106820474B
Application number: CN201610921290.2A
Authority: CN
Inventors: 小岛昌芳; 佐藤秀树
Original assignee: YKK Corp
Current assignee: YKK Corp
Priority date: 2015-10-29
Filing date: 2016-10-21
Publication date: 2020-02-14
Anticipated expiration: 2036-10-21
Also published as: TW201714548A; WO2017072926A1; TWI631917B; CN106820474A; CN206659298U

Abstract

The present application relates to a fastener stringer and a slide fastener. A fastener stringer (300) is provided with: a fastener tape (100) having a 1 st tape surface (101) and a2 nd tape surface (102); and a plurality of fastener elements (200) attached to the side edges (110) of the fastener tapes (100). A fastener element (200) is provided with: a base section (210) that sandwiches a core thread (120) of a side edge section (110) of a fastener tape (100); and a protrusion (220) protruding from the base (210) toward the outside of the fastener tape. The projection (220) includes a non-engaging portion (250) and an engaging portion (260). The engaging portion (260) includes a neck portion (230) and a head portion (240). The content of W1/L1 is more than 0.5 and less than 0.6. L1 represents the total length of the base (210) and the protruding part (220) in the width direction of the fastener tape, and W1 represents the width of the base (210) in the length direction of the fastener tape.

Description

Fastener stringer and slide fastener

Technical Field

The invention relates to a zipper teeth chain belt and a zipper.

Background

Patent document 1 discloses a resin-made fastener element improved to resemble a metal-made fastener element.

Documents of the prior art

Patent document

Patent document 1: international publication No. 2010/082294 (patent No. 5404650)

Disclosure of Invention

[ problems to be solved by the invention ]

Patent document 1 discloses a fastener element (10, 10', 30, 40) including an upper element half (11, 31, 41) including a tapered head (13, 13', 33, 43) and a lower element half (21) including a neck portion (23) and a head portion (24). The fastener element disclosed in patent document 1 has a reduced width in the tape length direction compared to a conventional fastener element that does not include tapered heads (13, 13', 33, 43). In addition, the tapered head is believed to be able to take on other alternative shapes.

In order to provide a smaller-sized slide fastener, the fastener elements are also required to be miniaturized. Generally, the shape of the small-sized fastener element is determined by reducing the size of the relatively large-sized fastener element by an equal factor. However, the present inventors have newly found a problem that, in the fastener element having a reduced width in the tape longitudinal direction as exemplified in the fastener element of patent document 1, sufficient mechanical strength of a mold for molding the fastener element is not easily secured even by a normal equal-magnification reduction method. In the present specification, an example based on the equal-magnification reduction is referred to as an equal-magnification reduction example.

[ means for solving problems ]

The fastener stringer 300 according to an embodiment of the present invention includes:

a fastener tape 100 having a 1 st tape surface 101 and a2 nd tape surface 102; and

a plurality of fastener elements 200 attached to side edges 110 of the fastener tapes 100;

the fastener element 200 includes a base portion 210 of the core wire 120 sandwiching the side edge portion 110 of the fastener tape 100, and a protrusion 220 protruding from the base portion 210 to the outside of the fastener tape,

the projection 220 includes a non-engaging portion 250 on the 1 st fabric surface 101 side and an engaging portion 260 on the 2 nd fabric surface 102 side,

the engaging portion 260 includes a neck portion 230 and a head portion 240 having a width in a length direction of the fastener tape greater than that of the neck portion 230,

satisfies the conditions that W1/L1 is more than 0.5 and less than 0.6,

here, L1 represents the total length of the base portion 210 and the projecting portion 220 in the fastener tape width direction, and W1 represents the width of the base portion 210 in the fastener tape length direction.

In some cases, when the base portion 210 is divided from the protruding portion 220 by a plane P3 which is a plane P1 perpendicular to the 1 st or 2

nd tape surface

101, 102 of the fastener tape 100 and parallel to the core wire 120 and which is moved toward the outside of the fastener tape until it is tangent to the outer periphery of the core wire 120,

satisfies the conditions that L2/L1 is more than 0.4 and less than 0.5,

here, L1 represents the total length of the base portion 210 and the projecting portion 220 in the fastener tape width direction, and L2 represents the length of the base portion 210 in the fastener tape width direction.

In several cases, 0.55 < W1/L1 < 0.6 is satisfied.

In some cases, satisfies 1.8 mm-0.2 mm ≦ W1 ≦ 1.8mm +0.2mm, and

3.1mm－0.2mm≦L1≦3.1mm+0.2mm。

in some cases, the width W250 of the non-engaging portion 250 in the length direction of the fastener tape is gradually reduced as the non-engaging portion 250 extends on the neck portion 230 and the head portion 240 in a direction away from the base portion 210.

In some cases, the non-engaging portion 250 has an inclined surface 252 which approaches the neck portion 230 side and then approaches the head portion 240 side as it goes away from the base portion 210.

In some cases, the fastener elements 200 have facing side surfaces 201 facing the fastener elements 200 adjacent to the core wires 120 along the side edge portions 110 of the fastener tapes 100,

the fastener element 200 has an outer peripheral edge 270 provided on the outer periphery of the core thread 120 on the facing side surface 201,

the fastener element 200 has a parting line 280 extending toward the outer peripheral edge 270 at the opposing side 201,

the parting line 280 has an inclined line 284 which is inclined with respect to a plane CP in which the fastener tape 100 is present, so as to draw at least a convex undulation 290 together with the outer peripheral edge 270, on the opposing side surface 201.

A slide fastener according to another aspect of the present invention includes a pair of fastener stringers 300 as described above, and a fastener slider for opening and closing the pair of fastener stringers.

[ Effect of the invention ]

According to an aspect of the present invention, a more sufficient mechanical strength of the mold for molding the fastener element can be ensured.

Drawings

Fig. 1 is a schematic perspective view of a pair of right and left fastener stringers included in a slide fastener according to an embodiment of the present invention, each fastener element being seen from above. Only 4 fastener elements are exemplarily illustrated in each fastener stringer.

Fig. 2 is a schematic perspective view of a pair of right and left fastener stringers included in the slide fastener according to the embodiment of the present invention, and each fastener element is seen in perspective from below. Only 4 fastener elements are exemplarily illustrated in each fastener stringer.

Fig. 3 is a schematic plan view of left and right fastener elements in a coupled state in a closed slide fastener according to an embodiment of the present invention, and the head portions are schematically shown in broken lines.

Fig. 4 is a schematic bottom view of right and left fastener elements in a coupled state in a closed slide fastener according to an embodiment of the present invention.

Fig. 5 is a schematic end view taken along V-V in fig. 3, and schematically shows the engaged state of the right and left fastener elements.

Fig. 6 is a schematic plan view and side view of a fastener element according to an embodiment of the present invention. The top view is shown on the upper side of the drawing, and the side view is shown on the lower side of the drawing. In the plan view, the neck portion of the fastener element is illustrated in a broken line. In the side view, the illustration of the fastener tape is omitted.

Fig. 7 is a schematic side view of a fastener element according to an embodiment of the present invention, and shows opposing side surfaces of the fastener element in a front view.

Fig. 8 is a schematic side view of a fastener element according to an embodiment of the present invention, and shows a front end side surface of the fastener element in a front view. A tapered inclined surface is illustrated.

Fig. 9 is a plan view showing an embodiment of the present invention in comparison with an equi-magnification reduction example, and shows a fastener element of the embodiment on the left side of the drawing and a fastener element of the equi-magnification reduction example on the right side of the drawing.

Fig. 10 is a bottom view showing an embodiment of the present invention in comparison with an equi-magnification reduction example, and shows a fastener element of the embodiment on the left side of the drawing and a fastener element of the equi-magnification reduction example on the right side of the drawing.

Fig. 11 is a plan view showing an embodiment of the present invention in comparison with an equi-magnification reduction example, and shows adjacent fastener elements of the embodiment on the upper side of the drawing and adjacent fastener elements of the equi-magnification reduction example on the lower side of the drawing.

Fig. 12 is a schematic perspective view of a pair of molds for molding in the embodiment of the present invention.

Fig. 13 is a schematic plan view showing a state in which molding dies according to an embodiment of the present invention are arranged in the tape longitudinal direction. The arrangement of 2 lower patterns of the embodiment is shown on the left side of the drawing, and the arrangement of 2 lower patterns of the reduced-size example is shown on the right side of the drawing.

Detailed Description

Non-limiting exemplary embodiments of the present invention will be described below with reference to fig. 1 to 13. The features included in 1 or more embodiments and embodiments disclosed are not independent of each other. Those skilled in the art will be able to combine embodiments and/or features without undue experimentation and will understand the synergistic effect of such combinations. The overlapping description between the embodiments is omitted in principle. The description of the invention is mainly for the purpose with reference to the accompanying drawings and there are cases where it is simplified for the sake of convenience of drawing.

The fastener stringer 300 according to one embodiment of the present invention described with reference to fig. 1 to 13 includes: the fastener tape 100 includes 1 st and 2 nd tape surfaces 101 and 102, and a plurality of fastener elements 200 attached to side edges 110 of the fastener tape 100. Each fastener element 200 includes: a base portion 210 of the core wire 120 sandwiching the side edge portion 110 of the fastener tape 100, and a protrusion 220 protruding from the base portion 210 to the outside of the fastener tape. The projection 220 includes a non-engaging portion 250 on the 1 st web surface 101 side and an engaging portion 260 on the 2 nd web surface 102 side. The engaging portion 260 includes a neck portion 230, and a head portion 240 having a width in a length direction of the fastener tape greater than that of the neck portion 230. When L1 represents the total length of the base portion 210 and the protruding portion 220 of the fastener element 200 in the fastener tape width direction and W1 represents the width of the base portion 210 of the fastener element 200 along the fastener tape length direction, 0.5 < W1/L1 < 0.6 is satisfied.

According to the fastener stringer as described above, a more sufficient mechanical strength of the fastener element molding die can be ensured. Specifically, the thickness of the fastener tape in the longitudinal direction of the fastener tape can be more secured in the wall portion of the mold that is in contact with the adjacent mold when the molds are arranged adjacent to each other in the longitudinal direction of the fastener tape. Thus, the die wall can be prevented or suppressed from being chipped. Further, according to the fastener stringer as described above, a greater mounting strength of the fastener element to the fastener tape can be secured.

In providing a smaller-sized slide fastener, the slide fastener slider, or the fastener element, is also miniaturized. Those skilled in the art generally reduce the size of the relatively large-sized fastener elements to an equal size to determine the shape of the small-sized fastener elements. In particular, in the fastener element having the reduced width in the longitudinal direction of the fastener tape exemplified in the fastener element of patent document 1, in order to give priority to the appearance of the metallic element style, it is important to reduce the width of the fastener element in the longitudinal direction of the fastener tape with respect to the length of the fastener element in the reduced width direction of the fastener tape. There is a possibility that the fastener element cannot be easily made to look like a metal element without reducing the width of the fastener element in the longitudinal direction of the fastener tape by an equal factor. That is, there is an obstacle to not reducing the width of the fastener element in the longitudinal direction of the fastener tape by the same factor.

The present inventors have found that, regardless of the above-described factors of hindrance, the above-described sacrifice, even with an equal reduction in magnification of the abandonment, still presents a valuable benefit. In brief, in the aspect disclosed in the present application, it is possible to ensure sufficient mechanical strength for each of 2 or more molds arranged in the longitudinal direction of the fastener tape. The zipper cloth belt is longer than the width of the cloth belt. When 2 or more fastener elements are provided more integrally by injection molding on such a fastener tape, 2 or more molding dies are provided adjacently in the longitudinal direction of the fastener tape. The mold has a wall portion that contacts an adjacent mold. The wall portion has a thickness along the length direction of the fastener tape. The thickness of the wall portion is made to coincide with 1/2 of the interval between the adjacent fastener element molding cavities. When the fastener elements are reduced in size by the same factor, the fastener element pitch is reduced accordingly. The thickness of the wall 1/2 of the space between the fastener element molding cavities is extremely reduced in accordance with the reduction of the fastener element by the same factor. Mechanical stress is applied to the wall of the mold by external force applied during installation of the mold, thermal shrinkage of the mold during injection molding, or the like. The partial breakage of the wall portion of the mold affects the shape of the fastener element to be injection molded.

In the disclosed embodiment, 0.5 < W1/L1 < 0.6 is satisfied, where L1 denotes the total length of the base portion 210 and the protruding portion 220 of the fastener element 200 in the fastener tape width direction, and W1 denotes the width of the base portion 210 of the fastener element 200 along the fastener tape length direction.

When the fastener element of the embodiment disclosed in patent document 1 is reduced to the target fastener element length by the same magnification, it is confirmed that W1/L1 < 0.5 is obtained. In this case, the width W1 of the base portion of the fastener element along the longitudinal direction of the fastener tape is narrow, so that the fastener element can be made closer to the metal element. However, in this case, the thickness of the wall portion of the mold becomes excessively small as described above. Further, there is a possibility that sufficient attachment strength of the fastener element to the fastener tape cannot be secured.

In the disclosed embodiments, 0.5 < W1/L1 < 0.6 is satisfied. Therefore, even if the appearance of the fastener element is sacrificed, the thickness of the wall portion of the mold can be ensured more, and further, the sufficient attachment strength of the fastener element to the fastener tape can be ensured.

In addition, the above description may be referred to after better understanding of the technical ideas of the invention disclosed in the present application. However, the above description does not set any limit to the invention defined in the claims. That is, as long as the manufacturing method or the design method is not clearly specified in the technical solution, the manufacturing method or the design method disclosed in the present application is not claimed to have any limiting effect on the invention specified in the technical solution of the present application.

Hereinafter, the 1 or more non-limiting embodiments and 1 or more features of the present invention will be described in more detail. The front-back direction is the same as the moving direction of the slide fastener slider. The front-back direction is equal to the length direction of the zipper cloth belt. The longitudinal direction of the fastener tape is simply referred to as the tape length direction. The front-back direction is the same as the arrangement direction of the fastener elements. The left and right directions are consistent with the width direction of the zipper cloth belt. The width direction of the fastener tape is simply referred to as the tape width direction. The left-right direction is the same as the longitudinal direction/extending direction/projecting direction of the fastener element. The up-down direction is a direction orthogonal to the front-back direction and the left-right direction.

As shown in fig. 1 to 4, the slide fastener includes a pair of right and left fastener stringers 300 arranged side by side on the right and left. The slide fastener has a slider, not shown, and the left and right fastener stringers 300 are opened and closed by the forward and backward movement of the slider. Further, the left and right fastener stringers 300 are closed by the slider being advanced. The left and right fastener stringers 300 are pulled apart by the pull back. When the left and right fastener stringers 300 are closed, the fastener elements 200 of the left and right fastener stringers 300 are engaged. When the left and right fastener stringers 300 are separated, the fastener elements 200 of the left and right fastener stringers 300 are in a non-engaged state.

The fastener tape 100 is a long body having a tape length larger than a tape width. The ratio of tape length to tape width is, for example, 1:2, 1:10, 1:100, 1:1000, or 1: 10000. These ratios are exemplary and not limiting.

The fastener tape 100 includes a flexible tape main body 105 having a tape upper surface 101 and a tape lower surface 102, and a flexible core wire 120 provided at an opposite side edge portion 110. The opposite side edge 110 of the fastener tape 100 is a side edge opposite to the side edge of the fastener tape 100 of the fastener stringer 300 to be coupled. The tape upper surface 101 may be referred to as a 1 st tape surface, and the tape lower surface 102 may be referred to as a2 nd tape surface. The 1 st cloth tape surface represents one of the upper and lower surfaces of the cloth tape, and the 2 nd cloth tape surface represents the other of the upper and lower surfaces of the cloth tape.

The core wires 120 linearly extend in the tape longitudinal direction at the opposite side edges 110 of the fastener tapes 100. The tape main portion 105 is a woven fabric or a knitted fabric. The core wire 120 has a structure in which a plurality of yarns are entangled, and is sewn to the tape main portion 105 or is integrally formed with the tape main portion 105. The core wire 120 is thicker than the tape main body portion 105 and has a cross-sectional shape of a substantially circular shape. The core wire 120 includes an upper core wire 121 on the tape upper surface 101 side of the tape main body portion 105 and a lower core wire 122 on the tape lower surface 102 side of the tape main body portion 106.

The fastener elements 200 are attached to the side edges 110 of the fastener tapes 100 and the core wires 120 at fixed element arrangement intervals, and are fixed to the side edges 110 of the fastener tapes 100 and the core wires 120 at fixed element arrangement intervals. As shown in fig. 3 and 4, the center lines CA200 of the fastener elements 200 adjacent in the tape length direction are substantially parallel. The center line CA200 of the fastener element 200 is disposed in the middle of a pair of opposing side surfaces 201 of the fastener element 200 opposing the fastener element 200 adjacent in the tape longitudinal direction.

The fastener element 200 is a resin element, and is molded through an injection molding step performed in a state where the fastener tape 100 is disposed between a pair of molds. The material of the fastener element 200 is, for example, polyamide, polyacetal, polypropylene, polybutylene terephthalate, or the like. In some cases, the fastener element 200 is lighter than a metal element.

The fastener element 200 includes a base portion 210 that sandwiches the core wire 120, and a protruding portion 220 that protrudes from the base portion 210 to the outside of the fastener tape. The fastener tape outer side is a direction from a position or point on the tape upper surface or lower surface of the tape main body portion 105 of the fastener tape 100 toward a position or point outside the tape upper surface or lower surface of the tape main body portion 105 of the fastener tape 100. In brief and clear, the outside of the fastener tape is a direction from a position or point on the upper or lower tape surface of the fastener tape 100 across the core wire 120 toward a position or point outside the upper or lower tape surface of the fastener tape 100. The inner side of the fastener tape faces in the opposite direction to the outer side of the fastener tape.

The base portion 210 includes an upper base portion 211 and a lower base portion 212 divided by the fastener tape 100 as a boundary line. The upper base 211 is provided on the tape upper surface 101 side of the tape main body portion 105, and contacts the upper core wire 121 and the tape upper surface 101. The lower base 212 is provided on the tape lower surface 102 side of the tape main body portion 105, and is in contact with the lower core wire 122 and the tape lower surface 102. The height H211 of the upper base 211 from the tape upper surface 101 of the tape main body portion 105 is substantially equal to the height H212 of the lower base 212 from the tape lower surface 102 of the tape main body portion 105.

The protruding portion 220 includes a non-engaging portion 250 provided on the tape upper surface 101 side and an engaging portion 260 provided on the tape lower surface 102 side. The engagement portion 260 includes a neck portion 230, and a head portion 240. The engaging portion 260 is engaged with the engaging portion 260 of the fastener element 200 to be engaged. The non-engaging portion 250 is not engaged with the fastener element 200 to be engaged. The non-engaging portion 250 may contact the fastener element 200 to be engaged. The head 240 is connected to the lower base 212 via the neck 230.

The width of the neck portion 230 in the tape length direction is decreased and then increased as the neck portion 230 is distant from the lower base 212 in the tape width direction. The width of the head 240 in the tape length direction increases and then decreases as the head 240 is distant from the lower base 212 in the tape width direction. The minimum width of the neck part 230 in the tape length direction is smaller than the maximum width of the head part 240 in the tape length direction.

A receiving space SP10 is provided between the head portion 240 and the lower base portion 212 in the tape width direction, and this receiving space SP10 partially receives the head portion 240 of the fastener element 200 to be engaged. The storage space SP10 may be simply referred to as a space. The head 240 of the fastener element 200 of the other fastener stringer 300 on the left and right sides may be disposed and inserted between the neck portions 230 of the adjacent fastener elements 200 in the tape length direction in the one fastener stringer 300 on the left and right sides. When the left and right fastener stringers 300 are pulled to the left and right outer sides, the left and right head portions 240 collide with each other, and the closed state of the left and right fastener stringers 300 is maintained.

The non-engaging portion 250 has a width W250 along the tape length direction, and the width W250 is gradually reduced as the non-engaging portion 250 extends on the neck portion 230 and the head portion 240 in a direction away from the upper base portion 211. The non-engaging portion 250 may also be referred to as a tapered portion. The non-engaging portion 250 is coupled to the upper base portion 211, the neck portion 230, and the head portion 240. The width W250 of the non-engaging portion 250 does not increase or decrease as the neck portion 230 and the head portion 240 move away from the base portion 210, but gradually decreases as the neck portion and the head portion move away from the base portion 210. Therefore, when the left and right fastener elements 200 are in the engaged state, the left and right non-engaging portions 250 are not engaged with each other, but merely engaged with or brought into contact with each other. The closed state of the left and right fastener stringers 300 is not maintained by engagement or contact of the left and right non-engaging portions 250. The coupling parts 260 of the left and right fastener elements 200 are required to be coupled with each other in order to maintain the closed state of the left and right fastener stringers 300.

The non-engaging portion 250 has a declined surface 252 on the side approaching the neck 230 and then the head 240 as it goes away from the upper base 211. The down-inclined surface 252 is at an angle of 10 to 60 °, 15 to 55 °, or 20 to 50 ° with respect to a plane CP in which the fastener tape 100 exists. Fig. 7 illustrates a plane CP existing in the middle of the tape upper surface 101 and the tape lower surface 102 of the tape main portion 105. As shown in fig. 8, the declined surface 252 has a tape length direction width W252 that narrows as it extends outward of the fastener tape toward the front end side of the non-engaging portion 250. The declined surface 252 may also be referred to simply as the inclined surface 252. The shape of the non-engaging portion 250 is not limited to the disclosed shape.

The non-engaging portion 250 includes a pair of wrapping portions 258 at least partially covering the housing space SP10 between the lower base portion 212 and the head portion 240 from above. In the case where the coating 258 is provided at the non-engaging portion 250, the displacement of the head 240 in the engaged state is restricted by the coating 258, so that more firm coupling of the left and right fastener stringers 300 can be ensured. Each of the covering portions 258 has a side surface 258m that approaches the center line CA200 of the fastener element 200 as extending in a direction away from the upper base portion 211.

As shown in fig. 3 and 6, the fastener element 200 has a facing side surface 201 corresponding to the fastener element 200 adjacent to the core wire 120 along the side edge portion 110 of the fastener tape 100. The base portion 210 of the fastener element 200 has a pair of opposing side surfaces 210m, 210n opposing the base portion 210 of the fastener element 200 adjacent in the tape length direction. A pair of opposing

sides

210m, 210n are oriented substantially parallel to each other.

The fastener elements 200 have a width W1 of the base portion 210 of the fastener element 200 along the tape length direction. The width W1 of the base 210 coincides with the interval between the pair of planes M1 and N1 defined corresponding to the pair of facing side surfaces 210M and 210N. The plane M1 is orthogonal to the longitudinal direction of the core wire 120 of the fastener tape 100 and the tape, and is in contact with a pair of facing side surfaces 210M of the pair of facing side surfaces 210M, 210 n. The plane N1 is orthogonal to the longitudinal direction of the core thread 120 of the fastener tape 100 and the tape, and is in contact with the other facing side surface 210N of the pair of facing side surfaces 210m, 210N.

The width W1 of the base portion 210 of the fastener element 200 is equal to the width of at least one of the upper base portion 211 and the lower base portion 212. In some cases, the width of the upper base 211 in the tape length direction is smaller than the width of the lower base 212 in the tape length direction. In some cases, the width of the upper base 211 in the tape length direction is larger than the width of the lower base 212 in the tape length direction. The portion of the base 210 having the maximum width in the tape length direction is referred to as the width W1 of the base 210. In some cases, the width W1 of the base 210 is coincident with the maximum separation of the pair of opposing

sides

210m, 210 n.

In the illustrated example, as understood from fig. 8, the upper base 211 of the fastener element 200 has a pair of opposing side surfaces 211m, 211n in the tape length direction. Similarly, the non-engaging portion 250 of the fastener element 200 has a pair of opposing side surfaces 250m, 250n in the tape length direction. Each of the facing side surfaces 211m, 250m is gently inclined so as to approach the other facing

side surface

211n, 250n as being distant from the tape upper surface 101 of the fastener tape 100. Each of the facing side surfaces 211n, 250n is inclined gently so as to approach the other facing

side surface

211m, 250m as being distant from the tape upper surface 101 of the fastener tape 100. In several embodiments, the widths of the upper base 211 and the non-engaging portion 250 in the tape length direction vary in this way. The same is true for the lower base portion 212 and the engagement portion 260.

The zipper element 200 may have a width W2 that is greater than the width W1 of the base 210 as shown and described above. For example, width W2 is shown in FIG. 6 to be greater than width W1. The width W2 corresponds to the maximum width of the non-engaging portion 250.

The fastener elements 200 have a length L1 along the tape width direction. The length L1 of the fastener element 200 is equal to the total length of the base portion 210 and the protruding portion 220 of the fastener element 200. The length L1 of the fastener element 200 is greater than the width W1 of the base portion 210 of the fastener element 200. Namely, L1 > M1 is satisfied. The width W1 of the base portion 210 of the fastener element 200 of the present embodiment is larger than the width W1 of the base portion 210 of the fastener element 200 of the isometric reduced example as described below. Therefore, the value of W1/L1 in this embodiment is larger than that of W1/L1 in the equi-demagnification example.

The length L1 of the fastener element 200 can also be understood as the interval of the plane P1 from the plane P2. The plane P1 is a plane perpendicular to the 1 st or 2 nd tape surfaces 101, 102 of the fastener tape 100 and parallel to the core wire 120. The plane P1 contacts the base portion 210 of the fastener element 200. The plane P1 is in contact with the coupling surface 210r that couples the opposing side surfaces 210m, 210n of the base portion 210 of the fastener element 200. The plane P2 is a plane obtained by moving the plane P1 in parallel to the outside of the fastener tape, and is in contact with the tip end of the protrusion 220 of the fastener element 200.

In addition, a plane P3 exists between plane P1 and plane P2. The plane P3 is a plane obtained by moving the plane P1 in parallel to the outside of the fastener tape, and is in contact with the outer periphery of the core wire 120. In the present application, the base portion 210 and the protruding portion 220 of the fastener element 200 are divided by the plane P3. When the base 210 and the protruding portion 220 are divided by the plane P3, the base 210 has a length L2 in the tape width direction, and the protruding portion 220 has a length L3 in the tape width direction. The relationship L1 — L2+ L3 holds.

In several embodiments, 0.5 < W1/L1 < 0.6 is satisfied. In several embodiments, 0.55 < W1/L1 < 0.6 is satisfied. The thickness of the wall portion of the mold can be ensured even if the appearance of the fastener element is sacrificed, and the sufficient mounting strength of the fastener element to the fastener tape can be ensured.

In several embodiments, 0.4 < L2/L1 < 0.5 is satisfied. A sufficient size of the base portion 210, and thus a sufficient attachment force of the fastener element 200 to the fastener tape 100 can be ensured. In the case of the reduction of the magnification, L2/L1 < 0.4 was used.

When the conditions of 0.5 < W1/L1 < 0.6 and 0.4 < L2/L1 < 0.5 are satisfied, a sufficient contact area of the base portion 210 with respect to the fastener tape 100 can be ensured, so that a more sufficient attaching force of the fastener element 200 to the fastener tape 100 can be ensured.

In some embodiments, the compositions satisfy W1 ≦ 1.8mm +0.2mm, and L1 ≦ 3.1mm +0.2mm from 1.8mm to 0.2 mm. Thus, even if the appearance of the fastener element is sacrificed, the thickness of the wall portion of the mold can be ensured to be larger, and further, the mounting strength of the fastener element to the fastener tape can be ensured to be more sufficient.

As illustrated in fig. 3, 6, and 7, the fastener element 200 has an outer peripheral edge 270 provided on the outer periphery of the core wire 120 on the opposing side surface 201. The fastener element 200 has a parting line 280 extending toward the outer peripheral edge 270 at the opposing side 201. The parting line 280 has an inclined line 284 which is inclined with respect to a plane CP in which the fastener tape 100 is present, while drawing at least a convex undulation 290 together with the outer peripheral edge 270, on the opposite side surface 201.

The boundary between the non-engaging portion 250 and the engaging portion 260 is defined by a parting line 280. A parting line 280 is a boundary line between an upper molding cavity for molding an upper portion of the fastener element 200 and a lower molding cavity for molding a lower portion of the fastener element 200. The parting line 280 includes a 1 st flat line 281 defining an upper limit position of the head 240 and a2 nd flat line 282 defining an upper limit of the neck 230. As understood from fig. 7, the 1 st and 2 nd

flat lines

281 and 282 are located more upward than a plane CP existing in the middle of the tape upper surface 101 and the tape lower surface 102 of the fastener tape 100. The engagement of the left and right engagement portions 260 may become stronger as the thickness of the head portion 240 increases.

Even if the 1 st and 2 nd

flat lines

281, 282 are spaced above the plane CP, an inclined line 284 may be provided between the 2 nd flat line 282 and the outer peripheral edge 270, and a gentle convex undulation 290 may be drawn between the inclined line 284 and the outer peripheral edge 270.

When the L-shaped line 286 shown by a broken line in fig. 7 is formed instead of the oblique line 284, the projections adjacent in the tape width direction are formed on the upper and lower molds for molding the fastener element 200. Such protrusions have a possibility of breakage during injection molding, resulting in a reduction in the life of the mold. When the oblique line 284 is omitted and the 2 nd flat line 282 is extended to the outer peripheral edge 270, there is a possibility that the holding force of the core wire 120 by the upper-type core wire holding groove for molding the fastener element 200 is reduced.

In the illustrated example, the outer peripheral edge 270 is contoured with a gently convex relief 290 by an inclined line 284. In this case, the catching of the core wire 120 by the core wire holding groove of the mold is ensured, so that the problem of the occurrence of the partial breakage of the protrusion of the mold can be avoided or reduced. This feature can be understood in conjunction with the assurance of the wall thickness of the mold described in the specification of the present application. In addition, the 1 st flat line and the 2 nd flat line may be collectively referred to simply as a flat surface.

Hereinafter, embodiment examples of the present invention and the equi-magnification reduction example are compared with each other with reference to fig. 9 to 13. Fig. 9 shows a fastener element of the embodiment on the left side of the drawing, and shows a fastener element of an isometric reduced example on the right side of the drawing. Fig. 10 shows a fastener element of the embodiment on the left side of the drawing, and shows a fastener element of an isometric reduced example on the right side of the drawing. Fig. 11 shows adjacent fastener elements according to the embodiment on the upper side of the drawing, and adjacent fastener elements according to an isometric reduced example on the lower side of the drawing. Fig. 13 schematically shows an arrangement of 2 molds according to the embodiment on the left side of the drawing, and an arrangement of 2 molds according to an equi-magnification reduction example on the right side of the drawing.

As understood from fig. 9 to 11, in both the embodiment of the present invention and the equi-magnification reduction example, the length L1 of the fastener element 200 is configured to reach the target value. In other words, the length L1 of the fastener element 200 of the embodiment example is equal to the length L1 of the fastener element 200 of the reduction example of equal magnification. The length L1 of the fastener element 200 takes a value within a width restricted by a small-size slider included in a small-size slide fastener. The length L1 of the fastener element 200 is determined according to the size of the fastener, and the variable width is narrow.

The width W1 of the base portion 210 of the fastener element 200 of the present embodiment is larger than the width W1 of the base portion 210 of the fastener element 200 of the isometric reduced example. As described in the beginning of the article, making the width W1 of the base portion 210 of the fastener element 200 small is important in making the appearance of the fastener element look similar to a metal element, and there is an obstacle to not making the width of the fastener element narrow equally. However, the present inventors adopted the increased width W1 of the base portion 210 of the fastener element 200 without being affected by the hindrance. Thus, even if the appearance of the fastener element is sacrificed, the thickness of the wall portion of the mold can be ensured to be larger, and further, the mounting strength of the fastener element to the fastener tape can be ensured to be more sufficient.

The fastener element 200 of the embodiment is set to the following value. The length L1 of the fastener element 200 along the tape length direction is 3.10 to 3.30 mm. The width W1 of the base portion 210 of the fastener element 200 in the tape width direction is 1.80 to 1.90 mm. The arrangement distance W5 of the fastener elements 200 along the tape length direction is 2.3-2.5 mm. The distance W6 between the facing side surfaces of the base parts 210 of the adjacent fastener elements 200 is 0.5 to 0.6 mm. For example, L1 is 3.10 mm; w1 ═ 1.80 mm; w5 ═ 2.4 mm; w6 ═ 0.55 mm. Further, as shown in fig. 4, the left and right widths of the engaged fastener element rows when the left and right fastener stringers are closed are 4.6 to 5.0 mm.

For the fastener element 200 of the reduced-size example, L1 is 3.10 mm; w1 ═ 1.50 mm; w5 ═ 1.95 mm; w6 ═ 0.40 mm. In the case of the reduction of the magnification, the value of W1 is small, and accordingly the value of W6 is small. With a smaller value of W6, the thickness of the wall portion of each die adjacent in the tape length direction also becomes smaller. In this case, there is a possibility that the mechanical strength of the mold is reduced.

Fig. 12 shows a mold for injection molding the fastener element 200 according to the embodiment. As shown in fig. 12, the mold includes an upper mold 400 and a lower mold 500. The upper mold 400 has a 1 st facing surface 401 and a2 nd facing surface 402 facing the lower mold 500. Between the 1 st facing surface 401 and the 2 nd facing surface 402, upper molding cavities 410 are arranged in a row. Between the adjacent upper molding cavities 410, an upper core wire holding groove 420 and a fitting recess 430 are disposed. The upper core wire holding groove 420 is disposed on the 1 st facing surface 401 side. The fitting recess 430 is disposed on the 2 nd opposing surface 402 side. The depth of the upper molding cavity 410 is greater than the depths of the upper core wire holding groove 420 and the fitting recess 430. The depth of the upper core wire holding groove 420 is larger than the depth of the fitting recess 430.

The lower mold 500 has a 1 st facing surface 501 and a2 nd facing surface 502 facing the upper mold 400. A row of lower molding cavities 510 is disposed between the 1 st facing surface 501 and the 2 nd facing surface 502. Between the adjacent lower molding cavities 510, a lower core wire holding groove 520 and a fitting projection 530 are disposed. The lower core wire holding groove 520 is disposed on the 1 st facing surface 501 side. The fitting projection 530 is disposed on the 2 nd opposing surface 502 side. The depth of the lower molding cavity 510 is greater than the depth of the lower core wire holding groove 520 and the protrusion height of the fitting projection 530. The depth of the lower core wire holding groove 520 is larger than the protruding height of the fitting projection 530.

When the upper mold 400 and the lower mold 500 are matched, a gap corresponding to the thickness of the tape main body portion 105 is formed between the 1 st facing surface 401 of the upper mold 400 and the 1 st facing surface 501 of the lower mold 500. When the fastener element 200 is injection-molded, the fastener tape 100 is disposed between the upper mold 400 and the lower mold 500. Therefore, the 1 st facing surface 401 of the upper mold 400 is in contact with the tape upper surface 101 of the tape main portion 105 of the fastener tape 100 at the time of injection molding. Similarly, the 1 st facing surface 501 of the lower mold 500 contacts the tape lower surface 102 of the tape main portion 105 of the fastener tape 100.

When the upper mold 400 and the lower mold 500 are mated, the upper molding cavity 410 and the lower molding cavity 510 constitute a single molding cavity, and the fastener element 200 is molded by the molding cavity thus constituted. A gate, not shown, is connected to at least one of the upper molding cavity 410 and the lower molding cavity 510. The molten material is supplied to each molding cavity through a runner and a gate, not shown, provided in the mold.

When the upper mold 400 and the lower mold 500 are matched, the 2 nd facing surface 402 of the upper mold 400 contacts the 2 nd facing surface 502 of the lower mold 500. When the upper mold 400 and the lower mold 500 are matched, the fitting concave portion 430 of the upper mold 400 is fitted with the fitting convex portion 530 of the lower mold 500. When the upper mold 400 and the lower mold 500 are matched, the upper core wire holding groove 420 of the upper mold 400 and the lower core wire holding groove 520 of the lower mold 500 constitute a core wire holding groove that is closed in a loop shape along the tape length direction, thereby holding the core wire of the fastener tape.

The upper mold cavity 410 is concavely provided between the 1 st facing surface 401 and the 2 nd facing surface 402 of the upper mold 400. The upper core wire holding groove 420 is also provided between the 1 st facing surface 401 and the 2 nd facing surface 402 of the upper mold 400 in a concave shape. The upper core wire holding groove 420 has a substantially semicircular sectional profile. The upper core wire holding groove 420 is provided between the upper molding cavities 410 adjacent in the tape length direction, and spatially communicates with each other. The fitting recess 430 is provided between the 1 st facing surface 401 and the 2 nd facing surface 402 of the upper mold 400 in a recessed shape. The fitting recess 430 is provided between the upper molding cavities 410 adjacent in the tape length direction, and spatially communicates with each other. The fitting recess 430 is provided between the adjacent upper molding cavities 410, and is adjacent to the upper core wire holding groove 420.

The lower molding cavity 510 is recessed between the 1 st facing surface 501 and the 2 nd facing surface 502 of the lower mold 500. The lower core wire holding groove 520 is also provided between the 1 st facing surface 501 and the 2 nd facing surface 502 of the lower mold 500 in a concave shape. The lower core wire holding groove 520 has a substantially semicircular sectional profile. The lower core wire holding groove 520 is provided between the lower molding cavities 510 adjacent in the tape length direction, and spatially communicates with each other. The fitting projection 530 is provided between the lower molding cavities 510 adjacent in the tape length direction. The fitting projection 530 is provided between the adjacent lower molding cavities 510, and is provided adjacent to the lower core wire holding groove 520.

The upper mold 400 has: an upper surface 403, 2 peripheral side surfaces 404 provided orthogonally to the arrangement direction of the upper molding cavities 410, and 2 peripheral side surfaces 405 provided parallel to the arrangement direction of the upper molding cavities 410. A thin wall 499 is provided between the outer peripheral side 404 and the upper mold cavity 410. The wall portion 499 includes a portion between a side surface of the upper mold cavity 410 and the outer circumferential side surface 404 of the upper mold 400.

The lower form 500 has: a lower surface 503, 2 peripheral side surfaces 504 provided orthogonally to the arrangement direction of the lower molding cavities 510, and 2 peripheral side surfaces 505 provided parallel to the arrangement direction of the lower molding cavities 510. A thin wall 599 is provided between the outer peripheral side surface 504 and the lower molding cavity 510. The wall portion 599 includes a portion between a side of the lower mold cavity 510 and the peripheral side 504 of the drag 500.

When a large number of fastener elements 200 are injection-molded on a long fastener tape 100, the number of molding cavities is insufficient for only one set of upper and lower molds, and thus a plurality of sets of upper and lower molds are used.

Fig. 13 schematically shows an arrangement of 2 molds according to the embodiment on the left side of the drawing, and an arrangement of 2 molds according to an equi-magnification reduction example on the right side of the drawing. The width W1 of the base portion 210 of the fastener element 200 of the embodiment example is larger than the width W1 of the base portion 210 of the fastener element 200 of the isometric reduced example. Therefore, the arrangement interval W5 of the fastener element 200 of the embodiment example is larger than the arrangement interval W5 of the fastener element 200 of the isometric reduced example. Therefore, the thickness of the

mold wall portions

499, 599 of the embodiment example is larger than the thickness of the

mold wall portions

499, 599 of the reduction example. Fig. 13 is a simplified illustration of the relationship between the thickness E1 of the wall portion 599.

The manufacturing method of the fastener stringer 300 using the mold is as follows. First, the upper mold 400 and the lower mold 500 are prepared. The fastener tapes 100 are provided between the upper mold 400 and the lower mold 500. The upper mold 400 and the lower mold 500 are matched. The molten material is supplied to a molding cavity defined by the molding cavity of the upper mold 400 and the molding cavity of the lower mold 500. The molten material within the mold is hardened by cooling the mold. The fastener elements 200 fixed in the side edge portions 110 of the fastener tapes 100 are molded. The upper mold 400 and the lower mold 500 are opened, and the fastener stringer 300 is taken out from between the upper mold 400 and the lower mold 500.

In some cases, the fastener tapes 100 are arranged in the lower mold 500, and the core wires 120 of the fastener tapes 100 are arranged in the lower core wire holding grooves 520 of the lower mold 500. The upper mold 400 is lowered with respect to the lower mold 500, during which the core wire 120 is caught by the upper core wire holding groove 420 of the upper mold 400. It is also conceivable to move the lower mold relative to the upper mold, or to move both the upper and lower molds.

Various manufacturing conditions, process flow temperatures, process flow times, and the like are appropriately determined by those skilled in the art.

From the above knowledge, those skilled in the art can add various modifications to the embodiments. Reference is made to the appended claims for reference purposes and not for purposes of limiting the interpretation of the claims.

[ description of symbols ]

100 zipper tape

101 upper surface of cloth belt (No. 1 cloth belt surface)

102 cloth tape lower surface (No. 2 cloth tape surface)

110 opposite side edge (side edge)

120 core wire

200 zipper teeth

210 base

220 projection

230 neck part

240 head

250 non-engaging part

260 engagement portion

300 zipper teeth chain belt

Claims

1. A fastener stringer (300) is provided with:

a fastener tape (100) having a 1 st tape surface (101) and a2 nd tape surface (102); and

a plurality of fastener elements (200) attached to side edges (110) of the fastener tapes (100);

the fastener element (200) includes a base portion (210) of a core wire (120) that sandwiches a side edge portion (110) of the fastener tape (100), and a protruding portion (220) that protrudes from the base portion (210) toward the outside of the fastener tape,

the protruding portion (220) includes a non-engaging portion (250) on the 1 st cloth band surface (101) side and an engaging portion (260) on the 2 nd cloth band surface (102) side,

the engaging part (260) includes a neck part (230) and a head part (240) having a width in a length direction of the fastener tape larger than that of the neck part (230), and

satisfies the conditions that W1/L1 is more than 0.5 and less than 0.6,

here, L1 represents the total length of the base portion (210) and the protruding portion (220) in the fastener tape width direction, and W1 represents the width of the base portion (210) in the fastener tape length direction.

2. The fastener stringer according to claim 1, wherein when the base (210) is divided from the protrusion (220) with a plane (P3) which is made to move toward a fastener tape outer side with respect to a plane (P1) which is perpendicular to a 1 st or 2 nd tape surface (101, 102) of the fastener tape (100) and parallel with respect to the core wire (120) until being tangent to an outer periphery of the core wire (120),

satisfies the conditions that L2/L1 is more than 0.4 and less than 0.5,

here, L1 represents the total length of the base portion (210) and the protruding portion (220) in the fastener tape width direction, and L2 represents the length of the base portion (210) in the fastener tape width direction.

3. The fastener stringer according to claim 1, wherein 0.55 < W1/L1 < 0.6 is satisfied.

4. The fastener stringer according to claim 2, wherein 0.55 < W1/L1 < 0.6 is satisfied.

5. The fastener stringer according to claim 3 or 4, wherein 1.8mm to 0.2mm W1 ≦ 1.8mm +0.2mm is satisfied, and

3.1mm－0.2mm≦L1≦3.1mm+0.2mm。

6. the fastener stringer according to any one of claims 1 to 4, wherein a width (W250) of the non-engaging portion (250) in a fastener tape length direction is gradually reduced as the non-engaging portion (250) extends on the neck portion (230) and the head portion (240) in a direction away from the base portion (210).

7. The fastener stringer according to any one of claims 1 to 4, wherein the non-engaging portion (250) has an inclined surface (252) which approaches the neck portion (230) side as going away from the base portion (210) and then approaches the head portion (240) side.

8. The fastener stringer according to any one of claims 1 to 4, wherein the fastener elements (200) have opposing sides (201) opposing the fastener elements (200) adjoining the core wires (120) along the side edge portions (110) of the fastener tapes (100),

the fastener element (200) has an outer peripheral edge (270) provided on the outer periphery of the core thread (120) on the facing side surface (201),

the fastener element (200) has a parting line (280) extending toward the outer peripheral edge (270) at the opposing side surface (201),

the parting line (280) has, on the opposing side surface (201), an inclined line (284) which is inclined with respect to a plane (CP) in which the fastener tape (100) is present, and which can draw at least a convex undulation (290) together with the outer peripheral edge (270).

9. A zipper, comprising:

a pair of fastener stringer (300) according to any one of claims 1 to 8, and

and a zipper slider for opening and closing the pair of zipper fastener stringers.