WO2017072926A1

WO2017072926A1 - Fastener stringer and slide fastener

Info

Publication number: WO2017072926A1
Application number: PCT/JP2015/080623
Authority: WO
Inventors: 昌芳小島; 佐藤　秀樹
Original assignee: Ykk株式会社
Priority date: 2015-10-29
Filing date: 2015-10-29
Publication date: 2017-05-04
Also published as: CN206659298U; TW201714548A; CN106820474B; CN106820474A; TWI631917B

Abstract

A fastener stringer (300) that comprises: a fastener tape (100) that has a first tape surface (101) and a second tape surface (102); and a plurality of fastener elements (200) that are attached to a side-edge portion (110) of the fastener tape (100). The fastener elements (200) include: a base portion (210) that sandwiches a core thread (120) of the side-edge portion (110) of the fastener tape (100); and a protruding portion (220) that protrudes from the base portion (210) toward the fastener-tape outside. The protruding portion (220) includes a non-engagement portion (250) and an engagement portion (260). The engagement portion (260) includes a neck portion (230) and a head portion (240). When L1 indicates the total length of the base portion (210) and the protruding portion (220) in the fastener-tape width direction and W1 indicates the width of the base portion (210) in the fastener-tape length direction, 0.5 < W1/L1 < 0.6.

Description

Fastener stringers and slide fasteners

This disclosure relates to fastener stringers and slide fasteners.

Patent Document 1 discloses a resin fastener element that is improved to be similar to a metal fastener element.

International Publication No. 2010/082294 (Japanese Patent No. 5404650)

Patent Document 1 discloses an element upper half (11, 31, 41) including a tapered head (13, 13 ′, 33, 43), and an element lower half including a neck (23) and a head (24) ( 21) fastener elements (10, 10 ', 30, 40) are disclosed. Compared with a general fastener element that does not include a tapered head (13, 13 ', 33, 43), the fastener element disclosed in Patent Document 1 has a reduced width in the tape length direction. It is understood that the tapered head can take other alternative shapes.

In order to provide smaller size slide fasteners, the fastener elements are also required to be miniaturized. Usually, the shape of a small-sized fastener element is determined by reducing a relatively large-sized fastener element at the same magnification. However, the inventor of the present application has a fastener element having a reduced width in the tape length direction exemplified by the fastener element of Patent Document 1 described above, even if a normal equal reduction method is adopted. A new problem has been found that it is not easy to ensure sufficient mechanical strength of a molding die. In the specification of the present application, an embodiment based on the same size reduction is referred to as a same size reduction example.

A fastener stringer according to one aspect of the present disclosure includes a fastener tape (100) having a first tape surface (101) and a second tape surface (102);
A fastener stringer (300) comprising a plurality of fastener elements (200) attached to a side edge (110) of the fastener tape (100),
The fastener element (200) includes a base portion (210) that sandwiches a core string (120) of a side edge portion (110) of the fastener tape (100), and a protruding portion that protrudes outward from the base portion (210). (220),
The protrusion (220) includes a non-engagement portion (250) on the first tape surface (101) side and an engagement portion (260) on the second tape surface (102) side,
The meshing part (260) includes a neck part (230) and a head part (240) having a width along the length direction of the fastener tape larger than the neck part (230),
0.5 <W1 / L1 <0.6 is satisfied,
Here, L1 indicates the total length of the base portion (210) and the protruding portion (220) in the fastener tape width direction, and W1 indicates the width of the base portion (210) in the fastener tape length direction.

In some cases, a plane (P1) perpendicular to the first or second tape surface (101, 102) of the fastener tape (100) and parallel to the core string (120) is the core string. When the base (210) and the protrusion (220) are separated by a plane (P3) moved outward from the fastener tape until it contacts the outer periphery of (120),
0.4 <L2 / L1 <0.5 is satisfied,
Here, L1 indicates the total length of the base portion (210) and the protruding portion (220) in the fastener tape width direction, and L2 indicates the length of the base portion (210) in the fastener tape width direction.

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

In some cases, 1.8 mm−0.2 mm ≦ W1 ≦ 1.8 mm + 0.2 mm and 3.1 mm−0.2 mm ≦ L1 ≦ 3.1 mm + 0.2 mm are satisfied.

In some cases, the width (W250) of the non-meshing portion (250) along the length of the fastener tape is such that the non-meshing portion (250) is separated from the base (210) in the direction of the neck (230) and It gradually becomes smaller as it extends over the head (240).

In some cases, the non-meshing portion (250) approaches the neck portion (230) side as it moves away from the base portion (210) and subsequently approaches the head portion (240) side. 252).

In some cases, the fastener element (200) has an opposing side surface (201) facing the adjacent fastener element (200) along the core string (120) of the side edge (110) of the fastener tape (100). Have
The fastener element (200) has an outer peripheral edge (270) provided on an outer periphery of the core string (120) on the opposing side surface (201),
The fastener element (200) has a parting line (280) extending toward the outer peripheral edge (270) on the opposite side surface (201),
The dividing line (280) is an inclined line that is inclined with respect to a plane (CP) on which the fastener tape (100) exists so as to draw a convex undulation (290) together with at least the outer peripheral edge (270) on the opposite side surface (201). (284).

A slide fastener according to another aspect of the present disclosure includes the pair of fastener stringers (300) and a fastener slider for opening and closing the pair of fastener stringers.

According to one aspect of the present disclosure, it is possible to ensure a sufficient mechanical strength of a mold for forming a fastener element.

It is a schematic perspective view of a pair of left and right fastener stringers included in a slide fastener according to an embodiment of the present disclosure, and each fastener element is viewed from above. In each fastener stringer, only four fastener elements are illustrated by way of example. It is a schematic perspective view of a pair of left and right fastener stringers included in a slide fastener according to an embodiment of the present disclosure, and each fastener element is perspectively viewed from below. In each fastener stringer, only four fastener elements are illustrated by way of example. FIG. 4 is a schematic top view of left and right fastener elements meshed with each other in a closed slide fastener according to an embodiment of the present disclosure, and schematically shows the head in broken lines. FIG. 4 is a schematic bottom view of left and right fastener elements in a meshed state in a closed slide fastener according to an example embodiment of the present disclosure. FIG. 4 is a schematic end face schematic view taken along line VV in FIG. 3, schematically showing the meshed state of the left and right fastener elements. FIG. 2 is a schematic top view and side view of a fastener element according to an example embodiment of the present disclosure. A top view is shown on the upper side of the drawing and a side view is shown on the lower side of the drawing. In the top view, the neck of the fastener element is illustrated by a dotted line. In the side view, the illustration of the fastener tape is omitted. It is a schematic side view of the fastener element which concerns on the example embodiment of this indication, and the opposing side surface of a fastener element is shown by front view. It is a schematic side view of the fastener element which concerns on the example embodiment of this indication, and shows the front end side of a fastener element in front view. A tapered inclined surface is illustrated. The top view which compares and compares the example of an embodiment of this indication with an example of an equal reduction is shown, the fastener element concerning an example of an embodiment is shown on the left side of a drawing, and the fastener element concerning an example of an equal reduction is shown on the right side of a drawing. The bottom view which compares the embodiment example of this indication with a 1x reduction example is shown, the fastener element which concerns on an example embodiment is shown on the left side of a drawing, The fastener element which concerns on a 1x reduction example is shown on the right side of a drawing. The top view which compares the embodiment example of this indication with a 1x reduction example is shown, the adjoining fastener element concerning an embodiment example is shown on the upper part of a drawing, and the adjoining fastener element concerning an example of 1x reduction is shown on the lower side of a drawing . It is a schematic perspective view of a pair of molds for molding according to an example embodiment of the present disclosure. It is a schematic top view which shows the state which has arrange | positioned the metal mold | die for the example of embodiment of this indication to the tape length direction. Two lower mold arrangements according to the embodiment are shown on the left side of the drawing, and two lower mold arrangements according to the same-size reduction example are shown on the right side of the drawing.

Hereinafter, non-limiting exemplary embodiments of the present invention will be described with reference to FIGS. 1 to 13. Each feature included in one or more disclosed embodiments and embodiments is not individually independent. Those skilled in the art can combine the embodiments and / or features without requiring an excessive explanation, and can also understand the synergistic effect of the combination. In principle, duplicate descriptions between the embodiments are omitted. The reference drawings are mainly for description of the invention, and may be simplified for convenience of drawing.

A fastener stringer 300 according to one aspect of the present disclosure described with reference to FIGS. 1 to 13 includes a fastener tape 100 having first and

second tape surfaces

101 and 102, and side edges 110 of the fastener tape 100. A plurality of fastener elements 200 attached to each other are provided. Each fastener element 200 includes a base portion 210 that sandwiches the core string 120 of the side edge portion 110 of the fastener tape 100 and a protruding portion 220 that protrudes outward from the base portion 210 from the fastener tape. The protrusion 220 includes a non-meshing portion 250 on the first tape surface 101 side and a meshing portion 260 on the second tape surface 102 side. The meshing part 260 includes a neck part 230 and a head part 240 having a width along the length direction of the fastener tape larger than the neck part 230. When L1 indicates 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 indicates 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 such a fastener stringer, it is possible to secure a sufficient mechanical strength of a mold for forming a fastener element. Specifically, when the molds are arranged adjacent to each other in the length direction of the fastener tape, it is possible to secure a larger thickness in the length direction of the fastener tape of the wall portion of the mold that comes into contact with the adjacent mold. This makes it possible to avoid or suppress chipping of the wall portion of the mold. Furthermore, according to such a fastener stringer, it is possible to ensure a greater attachment strength of the fastener element to the fastener tape.

When providing smaller size slide fasteners, fastener sliders and fastener elements are also downsized. Those skilled in the art usually determine the shape of a small size fastener element by reducing the size of a relatively large size fastener element by an equal magnification. In particular, with regard to a fastener element having a reduced width in the length direction of the fastener tape exemplified in the fastener element of Patent Document 1, the fastener element along the width direction of the fastener tape is reduced in order to give priority to the appearance of the metal element style. It is important to reduce the width of the fastener element along the length of the fastener tape with respect to the length of the fastener. If the width of the fastener element along the length direction of the fastener tape is not reduced by an equal magnification, the appearance of the fastener element may be difficult to show to the metal element. That is, there is a kind of hindrance to not reducing the width of the fastener element along the length direction of the fastener tape at the same magnification.

The inventor of the present application has found a benefit that even if the above-mentioned sacrifice due to the abandonment of the same size reduction is paid, the value is still found in spite of the above-described inhibition factors. In short, in the form disclosed in the present application, it is possible to ensure more sufficient mechanical strength of each of the two or more molds arranged in the length direction of the fastener tape. The fastener tape has a longer tape length than the tape width. When two or more fastener elements are integrally provided on such a fastener tape by injection molding, two or more molding dies are provided adjacent to the length direction of the fastener tape. The mold has a wall portion that contacts an adjacent mold. This wall portion has a thickness along the length direction of the fastener tape. The thickness of the wall portion is equal to ½ of the interval between adjacent fastener element molding cavities. When the fastener elements are reduced to the same size, the fastener element interval is also reduced accordingly. The thickness of the wall portion which is ½ of the interval between the fastener element molding cavities becomes very small in accordance with the same size reduction of the fastener element. Mechanical stress is applied to the wall portion of the mold due to external force applied when the mold is installed, thermal contraction of the mold during injection molding, or the like. The partial breakage of the mold wall portion 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 indicates 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 210 of the fastener element 200 along the length direction of the fastener tape.

It has been confirmed that W1 / L1 <0.5 when reduced to the same size as the target fastener element length of the embodiment of the fastener element disclosed in Patent Document 1. In this case, since the width W1 of the base part of the fastener element along the length direction of the fastener tape is narrow, the fastener element can be more similar to the metal element. However, in this case, the thickness of the wall portion of the mold becomes too small as described above. Furthermore, there is a possibility that sufficient attachment strength of the fastener element to the fastener tape cannot be secured.

In the disclosed embodiment, 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 a sufficient attachment strength of the fastener element to the fastener tape can be ensured.

The above description can be referred to in order to better understand the technical idea of the invention disclosed in the present application. However, the present invention is not limited to the claims. In other words, unless a manufacturing method or design method is explicitly specified in the claims, it is declared that the manufacturing method or design method disclosed in the present application does not serve as any limitation to the invention specified by the claims of the present application.

Hereinafter, one or more non-limiting embodiments and one or more features of the present disclosure will be described in more detail. The front-rear direction matches the moving direction of the fastener slider. The front-rear direction is equal to the length direction of the fastener tape. The length direction of the fastener tape is simply referred to as the tape length direction. The front-rear direction matches the arrangement direction of the fastener elements. The left-right direction matches the width direction of the fastener tape. The width direction of the fastener tape is simply called the tape width direction. The left-right direction matches the length direction / extending direction / projection direction of the fastener element. The vertical direction is a direction orthogonal to the front-rear direction and the left-right direction.

As shown in FIGS. 1 to 4, the slide fastener includes a pair of left and right fastener stringers 300 arranged side by side. The slide fastener has a slider (not shown), and the left and right fastener stringers 300 are opened and closed by moving the slider back and forth. The left and right fastener stringers 300 are closed by the advance of the slider. The left and right fastener stringers 300 are opened by the backward movement of the slider. When the left and right fastener stringers 300 are closed, the fastener elements 200 of the left and right fastener stringers 300 are in an engaged state. When the left and right fastener stringers 300 are opened, the fastener elements 200 of the left and right fastener stringers 300 are in an unengaged state.

The fastener tape 100 is a long body having a tape length larger than the tape width. The ratio of the tape length to the tape width is, for example, 1: 2 or 1:10 or 1: 100 or 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 string 120 provided on the opposite side edge 110. The opposing side edge portion 110 of the fastener tape 100 is a side edge portion that opposes the side edge portion of the fastener tape 100 of the fastener stringer 300 to be joined. The tape upper surface 101 may be referred to as a first tape surface, and the tape lower surface 102 may be referred to as a second tape surface. The first tape surface indicates one of the upper and lower surfaces of the tape, and the second tape surface indicates the other of the upper and lower surfaces of the tape.

The core string 120 extends linearly along the tape length direction at the opposite side edge 110 of the fastener tape 100. The tape main body 105 is woven or knitted. The core string 120 includes a structure in which a plurality of yarns are bundled, and is sewn to the tape main body 105 or constructed integrally with the tape main body 105. The core string 120 is thicker than the tape main body 105 and has a substantially circular cross-sectional shape. The core string 120 includes an upper core string 121 on the tape upper surface 101 side of the tape main body 105 and a lower core string 122 on the tape lower surface 102 side of the tape main body 106.

The fastener element 200 is attached to the side edge portion 110 and the core string 120 of the fastener tape 100 at a constant element arrangement interval, and is fixed to the side edge portion 110 and the core string 120 of the fastener tape 100 at a constant element arrangement interval. It is stuck. As shown in FIGS. 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 between the pair of opposed side surfaces 201 of the fastener element 200 facing the adjacent fastener element 200 in the tape length direction.

The fastener element 200 is a resin element, and is molded through an injection molding process 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 the metal element.

The fastener element 200 includes a base portion 210 that sandwiches the core string 120 and a protruding portion 220 that protrudes outward from the base portion 210 from the fastener tape. The outward direction of the fastener tape refers to a direction from a position or point on the upper or lower surface of the tape main body 105 of the fastener tape 100 toward a position or point outside the upper or lower surface of the tape main body 105 of the fastener tape 100. . In short, the outward direction of the fastener tape is a direction that crosses the core string 120 from a position or point on the upper or lower surface of the fastener tape 100 and goes to a position or point outside the upper or lower surface of the fastener tape 100. The inside of the fastener tape goes in the opposite direction to the outside of the fastener tape.

The base portion 210 includes an upper base portion 211 and a lower base portion 212 that are divided with the fastener tape 100 as a boundary. The upper base portion 211 is provided on the tape upper surface 101 side of the tape main body portion 105 and contacts the upper core cord 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 105 and contacts the lower core string 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 105 substantially coincides with the height H212 of the lower base 212 from the tape lower surface 102 of the tape main body 105.

The protrusion 220 includes a non-meshing portion 250 provided on the tape upper surface 101 side and a meshing portion 260 provided on the tape lower surface 102 side. The meshing part 260 includes a neck part 230 and a head part 240. The meshing portion 260 meshes with the meshing portion 260 of the mating counterpart fastener element 200. The non-meshing portion 250 does not mesh with the mating fastener element 200. In addition, the non-meshing portion 250 can also come into contact with the mating fastener element 200. The head 240 is connected to the lower base 212 via the neck 230.

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

In the tape width direction, an accommodation space SP10 is provided between the head 240 and the lower base 212, and the head 240 of the mating fastener element 200 is partially accommodated. The accommodation space SP10 may be simply referred to as a space. With respect to one of the left and right fastener stringers 300, the head 240 of the fastener element 200 of the other left and right fastener stringer 300 can be placed and inserted between the neck portions 230 of the fastener elements 200 adjacent in the tape length direction. When the left and right fastener stringers 300 are pulled outward in the left and right directions, the left and right heads 240 collide with each other, and the closed state of the left and right fastener stringers 300 is maintained.

The non-meshing portion 250 has a width W250 along the tape length direction that gradually decreases as the non-meshing portion 250 extends on the neck 230 and the head 240 in a direction away from the upper base 211. The non-meshing portion 250 may be called a tapered portion. The non-meshing 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-meshing portion 250 does not increase or decrease as the neck portion 230 and the head portion 240 are separated from the base portion 210, and gradually decreases as the head portion 210 is separated from the base portion 210. Therefore, when the left and right fastener elements 200 are engaged, the left and right non-engaging portions 250 are not engaged with each other, and are merely engaged or contacted. The closed state of the left and right fastener stringers 300 is not maintained by the engagement or contact of the left and right non-engagement portions 250. In order to maintain the closed state of the left and right fastener stringers 300, the meshing portions 260 of the left and right fastener elements 200 described above are required to mesh with each other.

The non-meshing portion 250 has a downwardly inclined surface 252 that approaches the neck portion 230 side as it moves away from the upper base portion 211 and subsequently approaches the head 240 side. The downward inclined surface 252 forms an angle of 10 ° to 60 °, 15 ° to 55 °, or 20 ° to 50 ° with respect to the plane CP on which the fastener tape 100 exists. FIG. 7 illustrates a plane CP existing between the tape upper surface 101 and the tape lower surface 102 of the tape main body 105. As shown in FIG. 8, the downwardly inclined surface 252 has a width W252 in the tape length direction that narrows as it extends outward from the fastener tape toward the distal end side of the non-engagement portion 250. The downward inclined surface 252 may be simply referred to as the inclined surface 252. The shape of the non-meshing portion 250 is not limited to that disclosed.

The non-meshing portion 250 includes a pair of covering portions 258 that at least partially cover the accommodation space SP10 between the lower base portion 212 and the head portion 240 from above. When the covering portion 258 is provided in the non-meshing portion 250, the displacement of the meshed head 240 is restricted by the covering portion 258, and a firmer connection between the left and right fastener stringers 300 can be secured. Each covering portion 258 has a side surface 258m that approaches the center line CA200 of the fastener element 200 as it extends in a direction away from the upper base portion 211.

As shown in FIGS. 3 and 6, the fastener element 200 has an opposing side surface 201 corresponding to the fastener element 200 adjacent along the core string 120 of the side edge 110 of the fastener tape 100. The base part 210 of the fastener element 200 has a pair of opposing side surfaces 210m and 210n that face the base part 210 of the fastener element 200 adjacent in the tape length direction. The pair of opposing side surfaces 210m and 210n are oriented substantially parallel to each other.

The fastener element 200 has a width W1 of the base 210 of the fastener element 200 along the tape length direction. The width W1 of the base 210 matches the distance between the pair of planes M1 and N1 defined corresponding to the pair of opposed side surfaces 210m and 210n. The plane M1 is perpendicular to the core string 120 of the fastener tape 100 and the tape length direction and is in contact with one of the opposing side surfaces 210m and 210n. The plane N1 is orthogonal to the core string 120 of the fastener tape 100 and the tape length direction, and is in a mode of contacting the other opposing side surface 210n of the pair of opposing side surfaces 210m and 210n.

The width W1 of the base 210 of the fastener element 200 matches the width of at least one of the upper base 211 and the lower base 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 coincides with the maximum distance between the pair of opposing side surfaces 210m and 210n.

In the illustrated example, as understood from FIG. 8, the upper base portion 211 of the fastener element 200 has a pair of opposing side surfaces 211m and 211n in the tape length direction. Similarly, the non-engagement portion 250 of the fastener element 200 has a pair of opposed side surfaces 250m and 250n in the tape length direction. Each opposing

side surface

211m, 250m is slowly inclined so as to approach the other opposing

side surface

211n, 250n as it is separated from the tape upper surface 101 of the fastener tape 100. Each opposing

side surface

211n, 250n is slowly inclined so as to approach the other opposing

side surface

211m, 250m as it is separated from the tape upper surface 101 of the fastener tape 100. In some embodiments, the widths of the upper base portion 211 and the non-meshing portion 250 in the tape length direction thus vary. This also applies to the lower base portion 212 and the meshing portion 260.

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

Fastener element 200 has 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 210 and the protrusion 220 of the fastener element 200. The length L1 of the fastener element 200 is larger than the width W1 of the base 210 of the fastener element 200. That is, L1> M1 is satisfied. The width W1 of the base portion 210 of the fastener element 200 according to this embodiment is larger than the width W1 of the base portion 210 of the fastener element 200 according to the same-size reduction example as described later. Therefore, the value of W1 / L1 according to the present embodiment is larger than the value of W1 / L1 according to the same-size reduction example.

It can also be understood that the length L1 of the fastener element 200 is an interval between the plane P1 and the plane P2. The plane P1 is a plane that is perpendicular to the first or

second tape surface

101, 102 of the fastener tape 100 and parallel to the core string 120. The plane P1 contacts the base 210 of the fastener element 200. The plane P1 contacts the connection surface 210r that connects the opposite side surfaces 210m and 210n of the base 210 of the fastener element 200. The plane P <b> 2 is a plane obtained by translating the plane P <b> 1 to the outside of the fastener tape, and comes into contact with the distal end portion of the protrusion 220 of the fastener element 200.

Note that a plane P3 exists between the plane P1 and the plane P2. The plane P3 is a plane obtained by translating the plane P1 to the outside of the fastener tape, and contacts the outer periphery of the core string 120. In the present application, it is assumed that the base portion 210 and the protruding portion 220 of the fastener element 200 are divided with the plane P3 as a boundary. When the base 210 and the protrusion 220 are separated by the plane P3, the base 210 has a length L2 in the tape width direction, and the protrusion 220 has a length L3 in the tape width direction. The relationship L1 = L2 + L3 is established.

In some embodiments, 0.5 <W1 / L1 <0.6 is satisfied. In some embodiments, 0.55 <W1 / L1 <0.6 is satisfied. 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 sufficient attachment strength of the fastener element to the fastener tape can be ensured.

In some 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. Note that L2 / L1 <0.4 in the same-size reduction example.

When 0.5 <W1 / L1 <0.6 and 0.4 <L2 / L1 <0.5 are satisfied, a sufficient contact area of the base 210 with the fastener tape 100 can be secured, and the fastener element 200 with respect to the fastener tape 100 can be secured. A sufficient mounting force can be secured.

In some embodiments, 1.8 mm−0.2 mm ≦ W1 ≦ 1.8 mm + 0.2 mm and 3.1 mm−0.2 mm ≦ L1 ≦ 3.1 mm + 0.2 mm are satisfied. Thereby, even if it sacrifices the appearance of the fastener element, the thickness of the wall portion of the mold can be ensured to be larger, and sufficient attachment strength of the fastener element to the fastener tape can be ensured.

As shown in FIGS. 3, 6, and 7, the fastener element 200 has an outer peripheral edge 270 provided on the outer periphery of the core string 120 on the opposite side surface 201. The fastener element 200 has a parting line 280 extending toward the outer peripheral edge 270 on the opposite side surface 201. The parting line 280 includes an inclined line 284 that is inclined with respect to the plane CP on which the fastener tape 100 exists to draw a convex undulation 290 with at least the outer peripheral edge 270 on the opposite side surface 201.

The boundary between the non-meshing portion 250 and the meshing portion 260 is defined by the parting line 280. The parting line 280 indicates a boundary between an upper molding cavity for molding the upper part of the fastener element 200 and a lower molding cavity for molding the lower part of the fastener element 200. The parting line 280 has a first flat line 281 that defines the upper limit position of the head 240 and a second flat line 282 that defines the upper limit of the neck 230. As can be understood from FIG. 7, the first flat line 281 and the second flat line 282 are located above a plane CP existing between the tape upper surface 101 and the tape lower surface 102 of the fastener tape 100. As the thickness of the head 240 increases, the engagement of the left and right engagement portions 260 can be made stronger.

Even if the first flat line 281 and the second flat line 282 are spaced upward from the plane CP, an inclined line 284 is provided between the second flat line 282 and the outer peripheral edge 270, and the inclined line 284 and the outer peripheral edge 270 A gentle convex relief 290 is drawn.

When an L-shaped line 286 indicated by a dotted line in FIG. 7 is formed instead of the inclined line 284, protrusions adjacent in the tape width direction are formed on the upper mold and the lower mold for molding the fastener element 200. Such protrusions may be damaged during the injection molding process, which may lead to a reduction in the life of the mold. When the inclined line 284 is omitted and the second flat line 282 extends to the outer peripheral edge 270, the holding force of the core string 120 by the upper core string holding groove for forming the fastener element 200 may be reduced.

In the illustrated example, a gentle convex undulation 290 is drawn by the inclined line 284 and the outer peripheral edge 270. In this case, capture of the core string 120 by the core string holding groove of the mold is ensured, and it is possible to avoid or reduce the occurrence of the problem of partial breakage of the protrusion of the mold. This feature is understood synergistically with the securing of the mold wall thickness described herein. In some cases, the first flat line and the second flat line are collectively referred to as a flat surface.

Hereinafter, with reference to FIG. 9 to FIG. 13, the embodiment of the present disclosure is compared with the same size reduction example. FIG. 9 shows the fastener element according to the embodiment example on the left side of the drawing, and shows the fastener element according to the same size reduction example on the right side of the drawing. FIG. 10 shows the fastener element according to the embodiment on the left side of the drawing, and shows the fastener element according to the same size reduction example on the right side of the drawing. FIG. 11 shows the adjacent fastener elements according to the embodiment example on the upper side of the drawing, and shows the adjacent fastener elements according to the same size reduction example on the lower side of the drawing. FIG. 13 schematically shows an arrangement of two molds according to the embodiment example on the left side of the drawing, and schematically shows an arrangement of two molds according to the same size reduction example on the right side of the drawing.

As understood from FIGS. 9 to 11, the length L1 of the fastener element 200 is configured to be a target value in both the embodiment example of the present disclosure and the same-size reduction example. In other words, the length L1 of the fastener element 200 according to the embodiment is equal to the length L1 of the fastener element 200 according to the same-size reduction example. The length L1 of the fastener element 200 takes a value within a width restricted by a small size slider included in the small size slide fastener. The length L1 of the fastener element 200 takes a value determined according to the size of the slide fastener, and its changeable width is narrow.

The width W1 of the base 210 of the fastener element 200 according to the present embodiment is larger than the width W1 of the base 210 of the fastener element 200 according to the same size reduction example. As described at the beginning, it is important to reduce the width W1 of the base 210 of the fastener element 200 in order to make the appearance of the fastener element look like a metal element. It can be said that there is a factor. However, the present inventor adopts the increased width W1 of the base 210 of the fastener element 200 in spite of this obstruction factor. Thereby, even if it sacrifices the appearance of the fastener element, the thickness of the wall portion of the mold can be ensured to be larger, and sufficient attachment strength of the fastener element to the fastener tape can be ensured.

The fastener element 200 according to the embodiment takes the following values. 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 210 of the fastener element 200 in the tape width direction is 1.80 to 1.90 mm. The arrangement interval W5 of the fastener elements 200 along the tape length direction is 2.3 to 2.5 mm. The distance W6 between the opposing side surfaces of the base portion 210 of the adjacent fastener element 200 is 0.5 to 0.6 mm. As an example, L1 = 3.10 mm; W1 = 1.80 mm; W5 = 2.4 mm; W6 = 0.55 mm. As shown in FIG. 4, the lateral width of the meshing fastener element row when the left and right fastener stringers are closed is 4.6 to 5.0 mm.

For the fastener element 200 according to the same size reduction example, L1 = 3.10 mm; W1 = 1.50 mm; W5 = 1.95 mm; W6 = 0.40 mm. In the same size reduction example, the value of W1 is small, and the value of W6 is also correspondingly small. Along with the small value of W6, the thickness of the wall portion of each mold adjacent in the tape length direction also decreases. In this case, the mechanical strength of the mold may be 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 first facing surface 401 and a second facing surface 402 that face the lower mold 500. A row of upper molding cavities 410 is disposed between the first facing surface 401 and the second facing surface 402. The upper core string holding groove 420 and the fitting recess 430 are disposed between the adjacent upper molding cavities 410. The upper core string holding groove 420 is disposed on the first facing surface 401 side. The fitting recess 430 is disposed on the second facing surface 402 side. The depth of the upper molding cavity 410 is larger than the depths of the upper core string holding groove 420 and the fitting recess 430. The depth of the upper core string holding groove 420 is larger than the depth of the fitting recess 430.

The lower mold 500 has a first facing surface 501 and a second facing surface 502 that face the upper mold 400. A row of lower molding cavities 510 is disposed between the first facing surface 501 and the second facing surface 502. A lower core string holding groove 520 and a fitting convex portion 530 are disposed between the adjacent lower molding cavities 510. The lower core string holding groove 520 is disposed on the first facing surface 501 side. The fitting convex portion 530 is disposed on the second facing surface 502 side. The depth of the lower molding cavity 510 is larger than the depth of the lower core string holding groove 520 and the protruding height of the fitting convex portion 530. The depth of the lower core string holding groove 520 is larger than the protruding height of the fitting convex portion 530.

When the upper mold 400 and the lower mold 500 are matched, a gap corresponding to the thickness of the tape main body 105 is formed between the first facing surface 401 of the upper mold 400 and the first facing surface 501 of the lower mold 500. The When the fastener element 200 is injection molded, the fastener tape 100 is disposed between the upper mold 400 and the lower mold 500. Accordingly, during injection molding, the first facing surface 401 of the upper mold 400 comes into contact with the tape upper surface 101 of the tape main body 105 of the fastener tape 100. Similarly, the first facing surface 501 of the lower mold 500 is in contact with the tape lower surface 102 of the tape main body 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 form one molding cavity, and the fastener element 200 is molded by the constructed molding cavity. . A gate (not shown) is connected to at least one of the upper molding cavity 410 and the lower molding cavity 510. 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 second facing surface 402 of the upper mold 400 comes into contact with the second facing surface 502 of the lower mold 500. When the upper mold 400 and the lower mold 500 are matched, the fitting recess 430 of the upper mold 400 and the fitting protrusion 530 of the lower mold 500 are fitted. When the upper mold 400 and the lower mold 500 are matched, the upper core string holding groove 420 of the upper mold 400 and the lower core string holding groove 520 of the lower mold 500 are held in an annularly closed core string extending in the tape length direction. A groove is constructed, thereby holding the core string of the fastener tape.

The upper molding cavity 410 is recessed between the first facing surface 401 and the second facing surface 402 of the upper mold 400. The upper core string holding groove 420 is also recessed between the first facing surface 401 and the second facing surface 402 of the upper mold 400. The upper core string holding groove 420 has a substantially semicircular cross-sectional profile. The upper core string holding groove 420 is provided between the upper molding cavities 410 adjacent in the tape length direction and spatially communicates both. The fitting recess 430 is recessed between the first facing surface 401 and the second facing surface 402 of the upper mold 400. The fitting recess 430 is provided between the upper molding cavities 410 adjacent in the tape length direction, and allows both to communicate spatially. The fitting recess 430 is provided adjacent to the upper core string holding groove 420 between the adjacent upper molding cavities 410.

The lower molding cavity 510 is recessed between the first facing surface 501 and the second facing surface 502 of the lower mold 500. The lower core string holding groove 520 is also recessed between the first facing surface 501 and the second facing surface 502 of the lower mold 500. The lower core string holding groove 520 has a substantially semicircular cross-sectional profile. The lower core string holding groove 520 is provided between the lower molding cavities 510 adjacent in the tape length direction and spatially communicates both. The fitting convex part 530 is provided between the lower molding cavities 510 adjacent in the tape length direction. The fitting convex portion 530 is provided adjacent to the lower core string holding groove 520 between the adjacent lower molding cavities 510.

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

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

When injection-molding a large number of fastener elements 200 on a long fastener tape 100, the number of molding cavities is insufficient with only one set of upper mold and lower mold, and a plurality of sets of upper mold and lower mold are used. It is done.

FIG. 13 schematically shows an arrangement of two dies according to the embodiment example on the left side of the drawing, and schematically shows an arrangement of two dies according to the same size 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 is larger than the width W1 of the base portion 210 of the fastener element 200 of the same size reduction example. Accordingly, the arrangement interval W5 of the fastener elements 200 of the embodiment is larger than the arrangement interval W5 of the fastener elements 200 of the same size reduction example. Therefore, the thickness of the

mold wall portions

499 and 599 according to the embodiment is larger than the thickness of the

mold wall portions

499 and 599 according to the same size reduction example. FIG. 13 simply shows the magnitude relationship of the thickness E1 of the wall portion 599.

The manufacturing method of the fastener stringer 300 using a mold is as follows. First, an upper mold 400 and a lower mold 500 are prepared. A fastener tape 100 is provided between the upper mold 400 and the lower mold 500. The upper mold 400 and the lower mold 500 are matched. Molten material is supplied to the molding cavity defined by the molding cavity of the upper mold 400 and the molding cavity of the lower mold 500. The molten material in the mold is cured by cooling the mold. The fastener element 200 fixed to the side edge portion 110 of the fastener tape 100 is molded. The upper mold 400 and the lower mold 500 are opened, and the fastener stringer 300 is taken out between them.

In some cases, the fastener tape 100 is disposed in the lower mold 500, and the core string 120 of the fastener tape 100 is disposed in the lower core string holding groove 520 of the lower mold 500; the upper mold 400 is lowered with respect to the lower mold 500 In this process, the core string 120 is captured by the upper core string holding groove 420 of the upper mold 400. A form in which the lower mold is moved with respect to the upper mold, or both the upper mold and the lower mold are moved is also assumed.

Various manufacturing conditions, process temperature, process time, etc. are appropriately determined by those skilled in the art.

Based on the above teaching, those skilled in the art can make various modifications to the embodiments. Reference signs included in the claims are for reference only and should not be referenced for the purpose of limiting the scope of the claims.

100 fastener tape 101 upper surface of tape (first tape surface)
102 Tape bottom surface (second tape surface)
110 Opposite side edge (side edge)
120 Core string 200 Fastener element 210 Base part 220 Protruding part 230 Neck part 240 Head part 250 Non-engagement part 260 Engagement part

300 Fastener stringer

Claims

A fastener tape (100) having a first tape surface (101) and a second tape surface (102);
A fastener stringer (300) comprising a plurality of fastener elements (200) attached to a side edge (110) of the fastener tape (100),
The fastener element (200) includes a base portion (210) that sandwiches a core string (120) of a side edge portion (110) of the fastener tape (100), and a protruding portion that protrudes outward from the base portion (210). (220),
The protrusion (220) includes a non-engagement portion (250) on the first tape surface (101) side and an engagement portion (260) on the second tape surface (102) side,
The meshing part (260) includes a neck part (230) and a head part (240) having a width along the length direction of the fastener tape larger than the neck part (230),
0.5 <W1 / L1 <0.6 is satisfied,
Here, L1 represents a total length of the base part (210) and the protrusion part (220) in the fastener tape width direction, and W1 represents a width of the base part (210) in the fastener tape length direction.
A plane (P1) perpendicular to the first or second tape surface (101, 102) of the fastener tape (100) and parallel to the core string (120) is an outer periphery of the core string (120). When the base (210) and the protrusion (220) are separated by a plane (P3) moved outward from the fastener tape until it contacts
0.4 <L2 / L1 <0.5 is satisfied,
Here, L1 indicates the total length of the base (210) and the protrusion (220) in the fastener tape width direction, and L2 indicates the length of the base (210) in the fastener tape width direction. Fastener stringer as described in.
The fastener stringer according to claim 1 or 2, satisfying 0.55 <W1 / L1 <0.6.
The fastener stringer according to claim 3, wherein 1.8 mm-0.2 mm ≤ W1 ≤ 1.8 mm + 0.2 mm and 3.1 mm-0.2 mm ≤ L1 ≤ 3.1 mm + 0.2 mm are satisfied.
The width (W250) along the fastener tape length direction of the non-meshing portion (250) is such that the non-meshing portion (250) is separated from the base portion (210) in the neck (230) and the head (240). The fastener stringer according to any one of claims 1 to 4, which gradually decreases as it extends upward.
The non-meshing part (250) has an inclined surface (252) that approaches the neck part (230) side and then approaches the head part (240) side as it is separated from the base part (210). The fastener stringer as described in any one of Claims 1 thru | or 5.
The fastener element (200) has an opposing side surface (201) facing the adjacent fastener element (200) along the core string (120) of the side edge (110) of the fastener tape (100),
The fastener element (200) has an outer peripheral edge (270) provided on an outer periphery of the core string (120) on the opposing side surface (201),
The fastener element (200) has a parting line (280) extending toward the outer peripheral edge (270) on the opposite side surface (201),
The dividing line (280) is an inclined line that is inclined with respect to a plane (CP) on which the fastener tape (100) exists so as to draw a convex undulation (290) together with at least the outer peripheral edge (270) on the opposite side surface (201). The fastener stringer according to any one of claims 1 to 6, comprising (284).
A pair of fastener stringers (300) according to any one of claims 1 to 7;
A slide fastener including a fastener slider for opening and closing the pair of fastener stringers.