CN105530828A - Zipper chain, slide fastener, and manufacturing method of fastener elements - Google Patents

Abstract

The zipper (1) of the present invention has such a feature: the first main surface and the second main surface of the head body (21a, 51a) of the engaging head (21, 51) of the fastener element (20, 50) are in contact with the belt The longitudinal direction is perpendicular to the flat surface, and the pair of legs (23, 53) of the fastener element (20, 50) is obliquely bent or obliquely extended relative to the first and second main surfaces of the head body (21a, 51a). out. Thus, the slide fastener (1) of the present invention has an appearance quality different from conventional slide fasteners, and can stably obtain lateral tensile strength and top strength equal to or higher than conventional slide fastener chains.

Description

Zipper chain, slide fastener, and manufacturing method of fastener elements

technical field

The present invention relates to a slide fastener chain and a slide fastener having elements whose legs are bent or inclined with respect to the tape width direction, and a method for manufacturing the elements.

Background technique

A metal fastener element generally has an engaging head, a main body extending in one direction (rear) from the engaging head, and a pair of left and right leg parts branched from the main body in two branches and extending in one direction (rear). . Moreover, the meshing convex part and the meshing recessed part or the fitting space part in which the meshing convex part of the fastener element of a meshing object fits is arrange|positioned at the meshing head part.

As a type of metal fastener element, a so-called one-sided type fastener element (hereinafter referred to as "one-sided type") is known in which an engaging convex portion is provided on one surface (upper surface) of the engaging head and an engaging concave portion is provided on the other surface (lower surface) side. Sometimes referred to simply as single-sided fastener elements) and so-called double-sided type fastener elements in which a set of engaging protrusions and embedded spaces are provided on the upper and lower sides of the meshing head (hereinafter sometimes referred to simply as double-sided fastener elements).

As an example of a metal single side fastener element, the fastener element disclosed, for example in International Publication No. 2013/027281 (Patent Document 1) is known. Moreover, the element disclosed, for example in International Publication No. 2010/089854 (patent document 2) is known as an example of the double-sided fastener element made of metal.

In addition, generally speaking, a plurality of elements are attached to the fastener tape, and when the fastener tape is viewed from the tape front or tape back side, the meshing head, trunk and leg of the metal elements are mostly They are arranged linearly along the tape width direction (parallel to the tape width direction).

On the other hand, for example, in order to engage the left and right element rows without relying on the engaging convex part, engaging concave part (or fitting space part), or in order to differentiate from other products in appearance, or to differentiate from other products, or to For other reasons, there is also known a slide fastener in which a part of the fastener element is bent or bent with respect to the tape width direction when viewed from the tape surface or the tape back side of the fastener tape. In addition, examples of such slide fasteners are actually disclosed in, for example, US Patent No. 1864614 specification (Patent Document 3) and US Patent No. 2158079 Specification (Patent Document 4).

For example, the fastener element described in patent document 3 has a meshing head part, a main body part, and a pair of leg parts. In the engaging head of this patent document 3, there are no engaging protrusions or engaging recesses (or fitting spaces) for engaging with the elements of the engaging object, and the engaging head is positioned relative to the belt when viewed from the belt surface or the belt back side. The leg part and trunk|drum which are arrange|positioned parallel to the tape width direction of an element are provided obliquely, and when constructing a slide fastener, the element row on either side meshes with each other, and can close a slide fastener.

In addition, Patent Document 4 discloses an element having an engaging head and a pair of legs, or an element having an engaging head, a main body, and a pair of legs, the element having a belt on the surface of the belt or a belt. When viewed from the back side, the engaging head or the engaging head and the legs are bent with respect to the tape width direction.

In addition, in the fastener element of this patent document 4, a rotation preventing member is provided for preventing one fastener element row from moving toward the belt surface side or the belt surface side with respect to the other fastener element row in a state where the left and right fastener element rows are meshed. Turn back sideways.

prior art literature

patent documents

Patent Document 1: International Publication No. 2013/027281

Patent Document 2: International Publication No. 2010/089854

Patent Document 3: Specification of US Patent No. 1864614

Patent Document 4: Specification of US Patent No. 2158079

Contents of the invention

The problem to be solved by the invention

Like the fastener elements described in Patent Document 3 and Patent Document 4, the engaging head as a part of the fastener element has a curved form relative to the belt width direction when viewed from the belt surface or the belt back side, thereby having the fastener element The zipper presents a different appearance from the zipper with the usual fastener elements arranged along the belt width direction with the engaging head, trunk and legs. Therefore, it can differentiate from other products and improve the commodity value of its zipper products. .

However, on the other hand, in the slide fastener having the elements whose meshing heads are bent relative to the tape width direction, the meshing strength when the left and right element rows mesh with each other decreases because the meshing head has a curved shape. In addition, when the left and right fastener tapes are pulled in the direction apart in the state where the left and right element rows are meshed with each other, in the state where the left and right fastener element rows are meshed with each other, the fastener element row is applied to the front and rear directions. When an external force is applied, the left and right fastener element rows are likely to separate from each other, causing the left and right fastener belts to split, and the transverse tensile strength and top resistance (Japanese: 突き上げ) strength of the fastener belt are reduced.

Therefore, there is a problem that products (products using the slide fastener) using the slide fasteners in which parts of the fastener elements are bent in the tape width direction like Patent Document 3 and Patent Document 4 are not durable.

The present invention has been made in view of the above-mentioned conventional problems, and its specific purpose is to provide a product that is different from other products and can stably bend the part of the fastener element relative to the belt width direction when viewed from the belt surface or the belt back side. A zipper chain and a zipper ensuring sufficient meshing strength when the left and right element rows are meshed with each other, and a method for producing elements used in the zipper chain and the zipper.

solutions to problems

In order to achieve the above object, the zipper chain of the first aspect provided by the present invention includes a pair of fastener stringers as a basic structure, and this pair of fastener stringers has a pair of left and right fastener tapes and is installed on the A plurality of metal elements with side edge portions facing each other of the fastener tape, the elements having an engaging head, a main body arranged on one end side of the engaging head, and a One end is branched into a pair of legs protruding in two strands, and the engaging head includes a head body having a first main surface and a second main surface opposite to the first main surface, protruding from the The engaging convex portion on the first main surface of the head main body and the engaging concave portion recessed on the second main surface of the head main body, the main feature of this zipper chain is that the head The first main surface and the second main surface of the part body are flat surfaces perpendicular to the belt length direction, and the pair of legs are opposite to the first main surface and the second main surface of the head main body. Slant bends or sticks out at a slant.

In the fastener chain of the present invention, it is particularly preferable that the pair of leg portions are bent or inclined relative to the first main surface and the second main surface of the head body in the protruding direction of the engaging convex portion.

In addition, the zipper chain of the second aspect provided by the present invention includes, as a basic structure, a pair of fastener tapes having a pair of left and right fastener tapes and a pair of fastener tapes attached to the fastener tape along the tape length direction by riveting. A plurality of metal fastener elements with side edge portions facing each other, the fastener elements having an engaging head, a trunk portion disposed on one end side of the engaging head, and branches branched from one end of the trunk portion. A pair of legs protruding from two strands, the engaging head includes a head body having a first main surface and a second main surface opposite to the first main surface, protruding from the head main body The engaging protrusions on the first main surface and the second main surface, and the engaging protrusions on the first main surface and the second main surface and the main body are arranged for engaging The most important feature of the zipper chain is that the first main surface and the second main surface of the head body are flat surfaces perpendicular to the longitudinal direction of the tape. The pair of legs are obliquely bent or obliquely protruded relative to the first main surface and the second main surface of the head body.

In the above-mentioned slide fastener chain of the present invention, it is preferable that the first main surface of the leg, which is the same side as the first main surface of the engaging head at the top end of the leg, is longer than the tape length. The meshing head of the fastener element on the side of the meshing object is arranged in the formation area of the head body in the direction.

In addition, in the fastener chain of the present invention, it is preferable that the depth of insertion of the engaging protrusion into the engaging recess or the fitting space of the element on the engaging object side in the belt length direction is lower than that of the The ratio of the projection dimension of the engaging protrusions in the belt length direction from the first main surface of the head body is set to 65% or more and 85% or less.

It is also preferable that the engagement protrusion is inserted into the engagement object in the belt length direction by specifying the size of the interval between the head bodies of adjacent elements in one fastener chain as a. When the magnitude of the insertion depth of the engaging recessed portion or the fitting space portion of the side element is b, the value of b/a is set to be 0.25 or more and 0.30 or less.

It is also preferable that the first main surface of the leg portion has a chamfered surface parallel to the first main surface and the second main surface of the head body at the tip end of the leg portion.

Furthermore, according to the present invention, it is possible to provide a slide fastener constituted by attaching a slider to an element row formed of a plurality of the elements of the slide fastener chain having the above-mentioned structure, and a pair of the legs are opposite to each other. The first main surface and the second main surface of the head body slide toward the slider to bend or incline in a sliding direction in which the pair of fastener stringers are engaged.

The slide fastener of the present invention described above preferably includes a separate insert having a plunger fixed to the rear end of one of the fastener stringers and a rod fixed to the rear end of the other fastener stringer. In the seat bar, the distance between the leg of the element arranged at the rearmost end of the element row and the plunger or the seat bar gradually increases toward the top end of the leg. .

Next, according to the present invention, it is possible to provide a method for manufacturing a metal fastener element having an engaging head, a main body arranged on one end side of the engaging head, and a One end of one end is branched into a pair of engaging protrusions protruding in two strands, and the engaging head includes a head body having a first main surface and a second main surface opposite to the first main surface, protruding from the The engaging convex portion on the first main surface of the head body and the bottomed engaging concave portion recessed on the second main surface of the head main body are the most important parts of the manufacturing method of the fastener element. It is characterized in that it includes the steps of: stamping a metal flat wire to form the engaging protrusion and the engaging recess; using a die and a cutting punch to form the engaging protrusion and the engaging Part of the flat wire material engaging the concave portion is punched into the element, and the cutting punch has a head-side flat portion having a flat surface abutting against the head main body at the tip end of the punch, and a flat surface relative to the head body. The flat surface of the head side flat portion is obliquely curved or inclined leg forming portion; The main surface and the second main surface are obliquely curved or inclined.

In the above-mentioned manufacturing method of the present invention, it is preferable that the cutting punch has a receiving recess or an insertion protrusion, the receiving recess is recessed in the head side flat part, and is used to accommodate the engaging protrusion, and the insertion protrusion A portion protrudes from the flat portion on the head side and can be inserted into the engaging recess.

It is also preferable that the manufacturing method of the present invention includes the step of forming the leg portion after punching is started by bringing the head side flat portion into contact with the flat wire when punching the fastener element. The pair of legs bend or incline when the part comes into contact with the flat wire.

It is also preferable that the manufacturing method of the present invention includes the step of: providing the leg portion forming portion with a portion that is bent or inclined in a direction opposite to the punching direction with respect to the flat surface of the head side flat portion; and a chamfered portion having a surface parallel to the flat surface of the head side flat portion is provided at a position of the punching die corresponding to the tip end portion of the leg portion of the fastener element. forming part.

The effect of the invention

The slide fastener chain according to the first aspect of the present invention has a pair of fastener tapes, and the pair of fastener tapes is equipped with metal so-called single-sided elements by riveting on the tape side edges of the pair of left and right fastener tapes facing each other. Wherein, the first main surface and the second main surface of the head main body of each fastener element are flat surfaces perpendicular to the belt length direction, and the pair of legs are inclined relative to the first main surface and the second main surface of the head main body. Bend or protrude at an angle.

Then, the zipper chain having metal single-faced elements whose legs are bent or inclined with respect to the tape width direction exhibits a conventional general zipper in which the engaging head, trunk, and legs of the elements are arranged along the tape width direction. Since the chain has a different appearance, differentiation from other products can be achieved, and the commodity value of a product with a zipper using the zipper chain can be easily increased.

In addition, in the fastener chain of the present invention, the first main surface and the second main surface of the head body of each element are arranged parallel to the tape width direction, and the first main surface of the head main body is protrudingly provided with an engaging protrusion. part, and a bottomed engagement recess is provided on the second main surface of the head main body, so that the left and right element rows can be stably engaged and separated, and in addition, it can stably obtain Transverse tensile strength and top strength above the same level.

In addition, in the fastener chain of the present invention, the pair of legs are crimped and fixed to the fastener tape obliquely or obliquely with respect to the tape width direction, so that the fastener elements are less likely to incline to the front or rear in the tape length direction, and can be stably held. Chain tooth attitude. Thereby, the left and right element rows can be smoothly engaged and separated after the slide fastener is produced, and the favorable sliding property of the slider can be ensured stably.

In addition, since the pair of leg portions of the fastener element are fixed to the fastener tape obliquely bent or obliquely with respect to the tape width direction, the contact area between the pair of leg portions and the tape side edge portion of the fastener tape becomes large, and therefore, it is possible to expect Improves the mounting strength of the elements relative to the zipper tape.

In addition, in the present invention, the first main surface and the second main surface of the main body of the fastener element may have only flat surfaces perpendicular to the belt length direction similarly to the first main surface and the second main surface of the head body. , may have only a curved surface or an inclined surface continuous with the first main surface and the second main surface of the leg, or may have both the flat surface and the curved surface or both the flat surface and the inclined surface.

In the above-mentioned fastener chain of the present invention, the pair of leg portions is obliquely bent or inclined toward the protruding direction of the engaging convex portion with respect to the first main surface and the second main surface of the head body.

Generally, in a slide fastener having metal single-faced elements, in order to smoothly engage and separate the left and right element rows, the engaging protrusions of the single-faced elements slide toward the slider to close the slide fastener with respect to the head body. The direction protrudes, in other words, when the single-faced element moves into the element guide path of the slider, the engaging protrusion does not protrude toward the rear mouth side of the slider, but protrudes toward the shoulder mouth side. Generally speaking, the single-sided elements moved near the back mouth of the slider are in a state where the left and right element rows are engaged with each other, and are less likely to be misaligned with respect to the slider. However, the single-sided elements moved near the shoulder of the slider move Since it is relatively free, it tends to be easily misaligned with respect to the slider.

Therefore, when the slide fastener is constructed and the slider slides in the direction of closing the slide fastener, the single-sided fastener element that moves from the shoulder of the slider to the element guide path moves around the shoulder and the leg of the single-sided fastener element is in contact with the puller. The case of head contact. In this case, since the pair of legs of the single-sided fastener element is bent or inclined toward the shoulder side in the same way as the protruding direction of the engaging protrusion, even if the legs of the single-sided fastener element come into contact with the slider, the single-sided fastener element The legs of the surface chain teeth are not easy to damage the slider.

In addition, when the slider is slid in the opening direction of the zipper, it is difficult for the single-sided fastener element moving from the rear mouth of the slider into the element guide passage to move around the rear mouth. Therefore, even if the pair of legs of the single-sided fastener element Even if bent or inclined as described above, the leg of the single-sided fastener element is not likely to damage the slider.

Next, the fastener chain according to the second aspect of the present invention has a pair of fastener tapes, and the pair of fastener tapes is equipped with a so-called double-sided chain made of metal by riveting on the tape side edges of the pair of left and right fastener tapes facing each other. teeth, wherein the first main surface and the second main surface of the head body of each element are flat surfaces perpendicular to the belt length direction, and the pair of legs are opposite to the first main surface and the second main surface of the head main body. The protruding direction facing one of the engaging protrusions is bent obliquely or projected obliquely.

Such a zipper chain of the second aspect can be differentiated from conventional general zipper chains in which the meshing head, trunk and legs of the fastener elements are arranged along the belt width direction similarly to the zipper chain of the above-mentioned first aspect. The commodity value of the zippered product adopting the zipper chain can be greatly improved. In addition to this, it is possible to stably engage and disengage the left and right element rows, and also to stably obtain transverse tensile strength and top strength equal to or higher than those of conventional conventional zipper chains.

In addition, since the pair of leg portions are crimped and fixed to the fastener tape obliquely or obliquely with respect to the tape width direction, the elements are less likely to tilt forward or backward in the tape length direction, and the posture of the elements can be stably maintained. Thereby, the left and right element rows can be smoothly meshed and separated after the slide fastener is produced, and the favorable sliding property of the slider can be ensured stably. Furthermore, since the contact area between a pair of leg parts of an element and the tape side edge part of a fastener tape becomes large, improvement of the attachment strength of an element with respect to a fastener tape can also be expected.

In the slide fastener chain of the present invention according to the above-mentioned first and second aspects, the first main surface of the front end of the leg, which is the surface on the same side as the first main surface of the engaging head at the front end of the leg, is The tape is arranged in the region where the head main body of the engaging head of the fastener element on the mating object side is formed in the longitudinal direction. Thereby, while the attachment strength of an element with respect to a fastener tape can be ensured suitably, it can prevent that the flexibility of a fastener chain falls because a leg part is too long, and can ensure appropriate flexibility stably.

In addition, in the fastener chain of the present invention, the insertion depth of the engaging convex portion inserted into the engaging concave portion or the fitting space portion of the fastener element on the mating object side in the tape length direction is greater than that of the engaging convex portion from the head in the tape longitudinal direction. The proportion of the projection dimension of the first main surface of the main body is set to 65% to 85%, preferably 70% to 80%.

By setting the ratio of the insertion depth of the engaging convex portion to the protruding dimension to be 65% or more, the engaging strength of the fastener chain can be increased, and desired transverse tensile strength and top strength can be stably ensured for use of the zippered product. In addition, by setting the ratio of the insertion depth of the meshing convex portion to the protruding dimension at 85% or less, it is possible to prevent the meshing of the left and right element rows from being too strong, and it is possible to stably ensure appropriate flexibility of the fastener chain. It prevents the slipperiness of the slider from being lowered after the zipper is completed.

In addition, in the fastener chain of the present invention, the size of the interval between the head bodies of adjacent elements in one fastener stringer is defined as a, and the engaging protrusion is inserted into the mating object side in the tape length direction. When the magnitude of the insertion depth of the meshing concave portion or the fitting space portion of the fastener element is b, the value of b/a is set to be 0.25 or more and 0.30 or less.

By setting the value of b/a to 0.25 or more, the meshing strength of the fastener chain can be increased, and desired transverse tensile strength and top strength can be stably ensured to withstand use of the zippered product. Moreover, the appropriate flexibility of a fastener chain can be ensured stably by making the value of said b/a 0.30 or less.

In addition, in the fastener chain of the present invention, the first main surface of the leg portion has a chamfer parallel to the first main surface and the second main surface of the head body at the tip end of the leg portion. The corner surface can make the hand touch and skin touch of the chain elements good. Moreover, when a slide fastener is comprised and a slider is made to slide in the slide fastener closing direction, the leg part of an element can make it difficult to damage a slider further.

Furthermore, according to the present invention, it is possible to provide a slide fastener which is constituted by using the slide fastener chain having the above-mentioned structure, and the pair of legs of the fastener element slide toward the slider with respect to the first main surface and the second main surface of the head main body. Curve or incline the sliding direction to engage the element rows.

Since such a slide fastener can easily be differentiated from conventional slide fasteners in which the engaging head, trunk, and legs of elements are arranged along the width direction of the tape, it is easy to increase the commodity value of zippered products using this slide fastener. . Moreover, the element rows on either side can be stably meshed and separated by sliding the slider. In addition, it is possible to stably obtain engagement strength equal to or higher than that of conventional general slide fasteners.

In addition, since the pair of leg portions are crimped and fixed to the fastener tape obliquely or obliquely with respect to the tape width direction, the elements are less likely to incline to the front or rear in the tape length direction, and the posture of the elements can be stably maintained. Thereby, the left and right element rows can be meshed and separated smoothly by sliding of the slider, and good slidability of the slider can be ensured stably.

The zipper of the present invention includes a separate insert, which has a plunger fixed to the rear end of one fastener stringer and a seat bar fixed to the rear end of the other fastener stringer. The distance between the leg of the rearmost element and the plunger or seat bar gradually increases toward the top end of the leg.

Thereby, the flexibility of the part of the fastener chain between the element and the plunger or the seat bar can be improved, and the direction of the plunger or the seat bar can be easily inclined in the tape width direction with respect to the element row. Thereby, the operation of inserting the plunger into the socket through the element guide passage of the slider and the operation of extracting the plunger from the socket through the element guide passage of the slider can be performed more smoothly, so that the separation of the insert can be improved. operability.

Next, the manufacturing method of the metal single-sided fastener element of the present invention includes the following steps: stamping and forming a metal flat wire to form an engaging convex portion and an engaging concave portion; A part is punched into a fastener element, the cutting punch has a head-side flat portion at the tip end of the punch, and a leg forming portion, the head-side flat portion has a flat surface, and the leg forming portion is bent obliquely with respect to the flat surface or inclined; and when punching the fastener element, the pair of legs are obliquely bent or inclined relative to the first main surface and the second main surface of the head body.

Adopt this manufacturing method of the present invention, can manufacture continuously stably. A single-sided chain element whose main surface and second main surface are obliquely curved or protruding obliquely.

In particular, the manufacturing method of the present invention is achieved by using an accommodating recess provided in the flat portion on the head side for accommodating the engaging protrusion, or an insertion protrusion protruding from the flat portion on the head side and capable of being inserted into the engaging recess. The cutting punch, as a cutting punch for punching the fastener elements, can easily maintain the shape of the engaging convex portion or the shape of the engaging concave portion when punching the fastener elements, and therefore, it is possible to stably manufacture the engaging convex portion or the engaging concave portion having a predetermined shape single-sided chain teeth.

In addition, the manufacturing method of the present invention includes the step of: when punching the fastener element, after starting the punching by bringing the head side flat portion into contact with the flat wire rod, bringing the leg portion forming portion into contact with the flat wire rod to make the pair of legs Curved or slanted. Thereby, while punching the element with the cutting punch, the leg portion of the element can be smoothly and stably plastically deformed to be obliquely bent or inclined with respect to the first main surface and the second main surface of the head body. shape.

In addition, the manufacturing method of the present invention includes the step of: providing the leg forming portion with a surface that is bent or inclined in a direction opposite to the punching direction with respect to the flat surface of the head side flat portion; and A chamfered portion forming portion having a surface parallel to the flat surface of the head side flat portion is provided at a position corresponding to the tip end portion of the leg portion of the element on the punching die. Thereby, it is possible to smoothly and stably form a chamfered portion (chamfered surface) having a surface parallel to the first main surface and the second main surface of the head main body at the tip end of the leg portion of the element when punching the element. .

Description of drawings

FIG. 1 is a plan view showing a slide fastener constructed using the slide fastener chain of Example 1 of the present invention.

Fig. 2 is a perspective view showing elements of the slide fastener.

Fig. 3 is a front view of the fastener element viewed from the side in the belt longitudinal direction on which the engaging protrusions are arranged.

Fig. 4 is a side view of the fastener element viewed from the tape width direction.

5 is a partial cross-sectional view illustrating a meshing state of left and right elements of the slide fastener by cutting away a part of the element row.

Fig. 6 is a cross-sectional view showing a relationship between left and right element rows and a slider.

Fig. 7 is an explanatory diagram illustrating the relationship between left and right element rows and separate inserts.

8 is a cross-sectional view illustrating a step of forming an engaging convex portion and an engaging concave portion in the process of manufacturing fastener elements.

Fig. 9 is a cross-sectional view illustrating a punching process of the fastener element in the process of manufacturing the fastener element.

Fig. 10 is a cross-sectional view illustrating a punching process of the fastener element in another manufacturing process of the fastener element.

It is a front view which looked at the fastener element used for the slide fastener chain which concerns on Example 2 of this invention from the tape length direction.

Fig. 12 is a sectional view of the fastener element.

detailed description

Hereinafter, preferred embodiments of the present invention will be described in detail by way of examples and with reference to the drawings. In addition, this invention is not limited at all by embodiment demonstrated below, As long as it has substantially the same structure as this invention, and can obtain the same operation effect, various changes are possible.

For example, in the slide fastener of Example 1 below, the separate inserts are disposed continuously to the left and right element rows at the lower end of the slide fastener chain, but in the present invention, a bottom stop may be provided instead of the separate inserts.

Example 1

FIG. 1 is a plan view showing a slide fastener constructed using the slide fastener chain of the first embodiment. 2 , 3 , and 4 are a perspective view, a front view, and a side view showing elements of the slide fastener, respectively.

In addition, in the following description, the front-back direction means the tape length direction of a fastener tape, and is the same direction as the sliding direction of a slider. Specifically, the front is the direction in which the slider slides so that the left and right element rows mesh with each other to close the slide fastener, and the rear refers to the direction in which the slider slides so that the left and right element rows separate and the slide fastener is opened.

The left-right direction refers to the tape width direction of the fastener tape, and is a direction parallel to the tape surface of the fastener tape and perpendicular to the tape length direction. In addition, the up-and-down direction is the tape front and back direction perpendicular to the tape surface of the fastener tape. In particular, with respect to the fastener tape, the direction on the side where the slider is arranged with the slider is taken as upward, and the direction on the opposite side is taken as below.

The slide fastener 1 of the first embodiment has a pair of left and right fastener tapes 10 in which element rows 12 are formed at the tape side edge portions of the left and right fastener tapes 11 , and a slider 30 arranged so as to be slidable along the fastener element rows 12 . , the top stopper 5 arranged adjacent to the front end side of the element row 12 to prevent the slider 30 from coming off, and the separation insert 6 arranged adjacent to the rear end side of the element row 12 .

In addition, the slide fastener 1 of the present embodiment 1 is mainly characterized in the structure of the fastener element 20 forming the fastener element row 12, and for example, the slider 30, the top stop member 5 and the separation insert 6 each have a metal structure that is different from the conventionally known conventional ones. The sliders, top stops, and separate inserts used in the zippers with single-sided elements are essentially the same structure.

For example, the slider 30 of the first embodiment includes a slider body 31 and a handle 32 rotatably held by the slider body 31 . In addition, the slider main body 31 has an upper wing 33 and a lower wing 34, a guide column 35 connecting the front ends (shoulder side end) of the upper wing 33 and the lower wing 34, and is arranged on the upper wing. 33, the left and right flanges 36 on the left and right side edges of the lower wing 34, and the handle mounting column 37 erected on the upper surface side of the upper wing 33 and holding the handle 32. .

Left and right shoulders sandwiching the guide post 35 are formed at the front end of the slider body 31 , and a rear opening is formed at the rear end of the slider body 31 . Moreover, between the upper wing board 33 and the lower wing board 34, the substantially Y-shaped element guide path which connects the left and right shoulder openings and a back opening is formed. Furthermore, between the left and right upper flanges 36 arranged on the upper blade 33 of the slider main body 31 and the left and right lower flanges 36 arranged on the lower blade 34 , holes for passing the left and right fastener tapes 11 are formed. With through gap.

The separation insert 6 of the present embodiment 1 has a plunger 7 fixed to the rear end of the left fastener stringer 10, a seat bar 8 fixed to the rear end of the right fastener stringer 10, and a seat bar 8 arranged on the seat bar 8. Socket 9 at the rear end. In addition, the materials of the slider 30 and the separation insert 6 are not particularly limited, and any material can be used.

Each fastener stringer 10 of the present embodiment 1 is formed by arranging a plurality of metal fastener elements 20 at predetermined intervals on the belt side edge of the fastener tape 11. A chain tooth 20 is formed. Moreover, the fastener chain is comprised by the element line 12 of the fastener stringer 10 on either side meshing with each other.

The zipper tape 11 is woven or braided into a tape shape, and has a tape main body as an attachment portion to a zipper product and a tape side edge portion disposed on one side edge of the tape main body for a plurality of fastener elements 20 to be arranged in a row. (Also known as the element installation part). In addition, in this Example 1, you may provide the core thread part formed so that it may protrude from the front and back of the tape of the fastener tape 11 in the tape side end edge which opposes each other of the fastener tape 11 on either side.

The element 20 of the first embodiment is formed of metal such as copper, copper alloy, aluminum alloy, or the like. As shown in FIGS. 2 to 4 , the fastener element 20 includes an engaging head 21 having an engaging convex portion 24 and an engaging concave portion 25 , a trunk portion 22 protruding from one end of the engaging head 21 , and an end branch of the trunk portion 22 . A pair of legs 23 extending in two strands.

In addition, the fastener element 20 is configured as a single-sided fastener element in which the engaging convex portion 24 and the engaging concave portion 25 are arranged on opposite sides of the engaging head 21, and the center position in the width direction of the fastener element (belt front and back directions) is used as a reference. symmetrically formed.

In addition, in FIGS. 2 to 4 , the form of the fastener element 20 mounted on the fastener tape 11 is shown, and the pair of legs 23 of the fastener element 20 before installation are split in the fastener element width direction by the main body 22 . Therefore, the element 20 before installation has a substantially Y-shaped form.

The engaging head 21 of the present embodiment 1 includes: a head main body 21a with a constant element thickness dimension (dimension in the belt length direction) between the front surface (the first main surface) and the rear surface (the second main surface); An engaging convex portion 24 protruding in a mountain shape on the front surface side of the head body 21a; and an engaging concave portion 25 having a bottom surface recessed on the rear surface side of the head main body 21a.

The front and rear surfaces of the head main body 21a are formed as flat surfaces (flat surfaces parallel to the belt width direction) orthogonal to the belt length direction, and the size of the head main body 21a in the belt length direction is constant. As shown in FIG. 5 , the engagement protrusions 24 and the engagement recesses 25 are arranged such that the positions of the engagement protrusions 24 on the front side and the engagement recesses 25 on the rear side of the head body 21 a correspond to each other.

In addition, in the present embodiment 1, in the belt length direction, the dimension from the front surface of the head main body 21a to the top end (top surface) of the engaging protrusion 24 (the height dimension of the engaging protrusion 24) is the same as that from the head main body. The dimension from the rear surface of 21a to the bottom surface of the engaging convex portion 24 (the depth dimension of the engaging concave portion 25) is set to a predetermined size, in particular, the height dimension of the engaging convex portion 24 is set to b/a which will be described later. The value is a size within a predetermined range.

The main body 22 of the present embodiment 1 is arranged from the end edge position of the meshing recess 25 in the element length direction (tape width direction) to the belt clamping surface 26 of the bifurcated part where the pair of leg parts 23 branch. position. That is, in the present embodiment 1, the trunk portion 22 refers to the portion arranged from the end edge position of the meshing concave portion 25 to the position of the belt clamping surface 26 of the bifurcated portion in the longitudinal direction of the fastener element. The portion on the outside of the belt from the trunk portion 22 serves as the engaging head portion 21 , and the portion disposed on the inside of the belt from the trunk portion 22 serves as the leg portion 23 . In addition, in the first embodiment, the front surface of the trunk portion 22 and the front surface of the head body 21a form the same plane, and the rear surface of the trunk portion 22 forms the same plane as the rear surface of the head body 21a. In addition, the front surface and the rear surface of the leg part 23 mentioned later are formed in the curved surface or the inclined surface, and are connected with the front surface and the rear surface of the main body part 22, respectively.

The legs 23 of the present embodiment 1 protrude from the main body 22 to the inside of the belt, and the top end regions (end regions near the inside of the belt) of the pair of legs 23 are provided with hook-shaped hooks bent in the direction (inward) approaching each other. Bending portion 23a. Moreover, the inner peripheral surface of the main body part 22 and a pair of leg part 23 is arrange|positioned parallel to a tape longitudinal direction, and this inner peripheral surface becomes the tape clamping surface 26 which contacts the fastener tape 11 closely.

In addition, the tape outside of the present invention refers to a portion closer to the tape outside than the tape end edge of the fastener tape 11 to which the fastener element 20 to be attached is attached when viewed from above in FIG. The tape edge of the fastener tape 11 to which the object fastener element 20 is attached is close to the tape inner side.

In addition, in the fastener element 20 of the present embodiment 1, when the slide fastener 1 is planarly viewed, a pair of leg portions 23 are positioned closer to the base end portion (the end portion on the side of the main body portion 22 ) than the base end portion of the pair of leg portions 23 as an engaging convex portion. 24 is bent and projected obliquely with respect to the front surface and the rear surface (or the tape width direction) of the head main body 21a in the form of the position ahead of the protruding direction.

In this case, the front surface of the portion other than the tip of the leg 23 is formed as a curved surface, and is concavely curved so that the tip of the leg 23 (band inner side) is located on the front side. In addition, the rear surface of the leg part 23 is formed as a curved surface, and is curved in a convex shape so as to be located on the front side as it gets closer to the tip of the leg part 23 (belt inner side). In addition, the thickness dimension (dimension in the belt longitudinal direction) of the portion other than the tip portion of the leg portion 23 is substantially constant as a whole.

In addition, in the first embodiment, the pair of leg portions 23 protrude while being bent as described above, but in the present invention, the pair of leg portions may be located in such a way that the top end of the leg is located more forward than the base end portion. The form of the position protrudes obliquely in a straight line with respect to the tape width direction.

In order to make the handle and skin feel of the fastener element 20 good, and to make the fastener element 20 difficult to catch on the slider 30 when the slider 30 slides, an inverted surface is provided on the front surface side of the top end of the leg portion 23 in Embodiment 1. Corner 23b. This chamfered part 23b is comprised by the surface parallel to the front surface and the rear surface of the head main body 21a.

In this case, the curved shape of the leg portion 23 is formed so that the position of the front surface of the tip portion of the leg portion 23, that is, the position of the flat surface of the chamfered portion 23b is arranged on the side of the mating object in the belt length direction. 20 in the formation area D of the head main body 21a.

By forming the curved shape of the leg part 23 in this way, the unique curved shape of the element 20 can be expressed emphatically, and the appropriate attachment strength of the element 20 with respect to the fastener tape 11 can be ensured stably. Moreover, it can prevent that the leg part 23 bends too much, and can suppress that the flexibility of the slide fastener 1 falls by the curved shape of the leg part 23.

Moreover, when the leg part 23 of the fastener element 20 has the curved shape as mentioned above, in the state which the fastener element row 12 of the left and right sides meshed, the fastener tape 11 of this left and right is pulled apart mutually. When the lateral tension is applied, a rotational moment acts on the element 20 at the portion to which the lateral tension is applied. For this reason, when a lateral tension is received in a part of the element row 12 , the left and right elements 20 may turn in a direction in which the meshing and disengagement of the left and right elements 20 are disengaged.

Therefore, in the present embodiment 1, even if the above-mentioned transverse pulling force is applied, the engagement and disengagement of the left and right fastener elements 20 are prevented. Protrusion height, etc., as shown in FIG. 5, the size of the interval between the head bodies 21a of adjacent fastener elements 20 in one fastener chain belt 10 is specified as a, and the engaging convex portion 24 of the fastener element 20 is placed on the belt. When the magnitude of the insertion depth inserted into the meshing concave portion 25 of the fastener element 20 on the mating object side in the longitudinal direction is defined as b, the value of b/a is set to 0.25 or more.

By setting the value of b/a to 0.25 or more in this way, a large insertion depth of the engaging convex portion 24 of each element 20 into the engaging concave portion 25 of the engaging element 20 can be ensured. Thereby, even if the fastener element 20 undergoes a movement such as rotation under a lateral pulling force, the meshing of the left and right fastener elements 20 will not be disengaged, and the meshing convex portion 24 of the fastener element 20 abuts against the meshing concave portion 25 of the mating object side. The inner wall surface can prevent the rotation angle of the chain element 20 from being too large.

Therefore, since the meshing state of the element rows 12 on either side can be stably maintained without disengaging the meshing of the left and right elements 20, the lateral tensile strength of the slide fastener 1 can be improved.

In addition, as described above, the meshing convex portion 24 of the fastener element 20 abuts against the inner wall surface of the meshing concave portion 25 on the mating object side, and the rotation of the fastener element 20 can be suppressed. Regarding the orientation of the element 20, the maximum rotation angle of the fastener element 20 that is rotated by a lateral pulling force is limited to 20° or less, preferably 15° or less.

In addition, in the present embodiment 1, by setting the value of b/a to 0.25 or more, the engaging convex portion 24 can be deeply inserted into the engaging concave portion 25 on the mating object side, so that the element row can also be improved. 12, the top strength is used to indicate the strength of the meshing state of the element row 12 under the action of external force in the positive and negative directions.

On the other hand, in the first embodiment, by setting the value of b/a to 0.30 or less, it is possible to prevent the meshing convex portion 24 of each fastener element 20 from entering too deeply into the fastener element 20 on the meshing partner side. into the recess 25. Thereby, the fall of the flexibility of the fastener stringer 10 (zipper chain) on either side in the meshing state can be suppressed, and appropriate flexibility can be ensured stably.

In addition, in the present embodiment 1, the insertion depth b of the engagement protrusion 24 inserted into the engagement recess 25 of the fastener element 20 on the mating object side in the belt length direction is lower than that of the engagement protrusion 24 in the belt length direction. The ratio of the projection dimension c (that is, the value of b/c×100) by which the front surface of the part main body 21a protrudes is set to 65% to 85%, preferably 70% to 80%.

By setting the ratio of the insertion depth of the engaging protrusion 24 to the protruding dimension to be 65% or more, the engaging protrusion 24 of the element 20 is deeply inserted into the mating partner side in the meshed state of the left and right element rows 12 . Therefore, the meshing strength of the slide fastener 1 is improved, and desired lateral tensile strength and top strength can be stably ensured.

In addition, by setting the ratio of the insertion depth of the meshing convex portion 24 to the protruding dimension to be 85% or less, it is possible to prevent the meshing of the left and right element rows 12 from being too strong, to prevent the meshed left and right element rows from becoming hard, and to ensure stable Appropriate flexibility of the slide fastener 1 can smooth the operation of meshing and separating the left and right element rows 12 due to the sliding of the slider 30 , and can stably ensure good slidability of the slider 30 .

In addition, in the first embodiment, as described above, the front surface and the rear surface of the head main body 21a and the front surface and the rear surface of the main body 22 are disposed on the same flat surface perpendicular to the belt length direction, respectively. The front surface and the rear surface of the leg part 23 are respectively formed as the curved surface obliquely curved with respect to the front surface and the rear surface of the head main body 21a and the trunk|drum 22. As shown in FIG.

Therefore, the boundary between the flat surface perpendicular to the belt length direction and the curved surface obliquely curved relative to the flat surface is set at the position of the boundary between the trunk portion 22 and the leg portion 23 (that is, the branch portion). The position of the inner peripheral surface of the fastener element in the length direction (belt width direction)).

However, in the present invention, the boundary position between the flat surface and the curved surface is not limited thereto, as long as the front surface and the rear surface of the head main body 21a are formed as flat surfaces perpendicular to the belt length direction, and the legs 23 By protruding obliquely with respect to the flat surface, the boundary position between the flat surface and the curved surface can be set within the formation area of the trunk portion 22 in the element length direction (tape width direction). That is, it is possible to form curved surfaces obliquely curved with respect to the front surface and the rear surface of the head body 21 a so as to be continuous with the trunk portion 22 and the leg portion 23 of the element 20 .

In addition, in the present invention, since the boundary position between the flat surface and the curved surface is far away from the head main body 21a, the shape of the engaging head 21 can be stabilized and desired engaging strength can be easily ensured. The boundary position is preferably set at the boundary position between the trunk portion 22 and the leg portion 23 as in the first embodiment.

Next, a method of manufacturing the fastener element 20 of the first embodiment will be described with reference to FIGS. 8 and 9 .

First, by using a pair of upper and lower dies 41a, 41b shown in FIG. 8, a flat wire 40 made of metal such as copper, copper alloy, or aluminum alloy is press-worked to locally plastically deform the flat wire 40, thereby forming The pitch forms an engaging convex portion 24 and an engaging concave portion 25 .

Next, the flat wire 40 formed with the engaging protrusion 24 and the engaging recess 25 is punched along the outer peripheral shape of the fastener element 20 using a cutting punch 42 and a die 43 shown in FIG. 9 .

A punching hole 43 a having a cross-sectional shape corresponding to the outer peripheral shape of the fastener element 20 is formed in the punching die 43 . In addition, at the tip end of the cutting punch 42, there are: a head-side flat portion 42a having a flat surface abutted against a portion of the flat wire 40 corresponding to the head body 21a and the trunk portion 22; and an accommodating recess 42b having Recesses are provided on the head side flat portion 42a for accommodating the engaging protrusions 24; leg forming portions 42c having curved surfaces obliquely curved with respect to the flat surfaces of the head side flat portion 42a; and chamfered portions formed The portion 42d is provided at a position corresponding to the top end of the leg portion 23 of the fastener element 20 . In this case, the curved surface of the leg forming portion 42c is convexly curved in a direction of inclination rising in a direction opposite to the punching direction with respect to the flat surface of the head side flat portion 42a. In addition, the chamfered portion forming portion 42d has a surface parallel to the flat surface of the head side flat portion 42a.

By using the cutting punch 42 and the punching die 43 as described above, the flat wire 40 formed with the engaging convex portion 24 and the engaging concave portion 25 is formed so that the cutting punch 42 and the front surface side of the fastener element 20 face each other. By performing punching processing, it is possible to plastically deform the leg portion 23 of the punched fastener element 20 to engage with the front surface and the rear surface of the head main body 21 a while punching the fastener element 20 having a predetermined outer peripheral shape. The protruding direction side of the protrusion 24 is a curved shape that is obliquely bent.

In particular, in this case, by bringing the leg portion forming portion 42c into contact with the flat wire 40 to bend the leg portion 23 when punching is started by bringing the head side flat portion 42a into contact with the flat wire 40, it is possible to use cutting. The punch 42 punches the fastener element 20 and deforms the leg portion 23 of the fastener element 20 into a predetermined curved shape smoothly and stably.

Furthermore, by providing the chamfer forming part 42d at the tip of the cutting punch 42, when the fastener element 20 is punched, the chamfer forming part 42d can be stably formed at the tip of the leg part 23 of the fastener element 20. chamfered portion 23b.

In particular, in the first embodiment, when the fastener elements 20 are punched, the engagement protrusions 24 formed in advance on the flat wire 40 are accommodated in the accommodation recesses 42b provided at the distal ends of the cutting punches 42 . Thereby, the punched portion of the flat wire 40 can be easily and stably positioned with respect to the cutting punch 42 and the punching die 43 , and the deformation of the engaging protrusion 24 can be prevented when the fastener element 20 is punched, and the engaging protrusion can be stably held. The shape of the portion 24.

By performing punching as described above, the fastener element 20 in which the pair of leg portions 23 are split can be obtained, and then the fastener element 20 of the present example 1 can be manufactured by subjecting the obtained fastener element 20 to a grinding process, a coating process, and the like. 20.

And the element 20 of this Example 1 manufactured in this way has the form which a pair of leg part 23 splits in the element width direction from the base end part of the main body part 22 side toward a front-end|tip part. Therefore, the tape side edge of the fastener tape 11 is inserted between the pair of leg portions 23, and then the pair of leg portions 23 are crimped inwardly toward each other to plastically deform the fastener element 20, thereby attaching the fastener element 20. Install (inlay) on the zipper tape 11.

Thereby, the fastener stringer 10 can be manufactured. Moreover, the slide fastener chain can be obtained by combining the manufactured fastener stringers 10 in pairs and making the element row 12 of each fastener stringer 10 mesh with each other. And, by attaching the slider 30 to the element row 12 of the zipper chain, and fixing the top stopper 5 and the separation insert 6 at predetermined positions of the zipper chain, the zipper of the first embodiment shown in FIG. 1 can be manufactured. 1.

In the slide fastener 1 of the present embodiment 1 obtained in this way, since the leg portion 23 of each fastener element 20 has a side curved toward the protruding direction side of the engaging protrusion 24 in the longitudinal direction with respect to the front surface and the rear surface of the head main body 21a, Because of its curved shape, its appearance quality is completely different from conventional zippers with ordinary elements, and it can differentiate itself from other products.

Also, since the leg 23 is formed into a curved shape and is fixed to the fastener tape 11, the fastener element 20 is difficult to incline to the front and the rear in the tape length direction. Therefore, even if the thickness of the leg 23 is slightly reduced (that is, the leg The dimension (thickness dimension) of the portion 23 in the tape length direction) can also stably maintain the posture of the fastener element 20 relative to the fastener tape 11. Moreover, since the contact area of the leg part 23 and the fastener tape 11 increases by forming the leg part 23 into a curved shape, improvement of the attachment strength of the element 20 with respect to the fastener tape 11 can also be expected.

In addition, in the slide fastener 1 of the present embodiment 1, regardless of whether the legs 23 are formed in a curved shape, the front surface and the rear surface of the head body 21a are arranged parallel to the tape width direction, and the engaging head 21 of each fastener element 20 It is formed to be substantially the same as the meshing head of a conventional general fastener element, and on this basis, the above-mentioned value of b/a and the ratio of the insertion depth of the meshing convex portion 24 to the protrusion dimension are set within a predetermined range. .

Thereby, in the slide fastener 1 of this Example 1, by sliding the slider 30, the element rows 12 on either side can be meshed smoothly, and the favorable slidability of the slider 30 can be ensured more stably. In addition, it is possible to stably obtain transverse tensile strength and top strength equal to or higher than conventional slide fasteners having common elements.

In addition, in the present embodiment 1, the leg portion 23 is formed in a curved shape, and the bending direction of the leg portion 23 with respect to the front surface and the rear surface of the head main body 21a both protrudes toward the engaging convex portion 24 with respect to the head main body 21a. The protruding direction is the front side. And, in the slide fastener 1 of the present embodiment 1, the engagement protrusion 24 of the fastener element 20 protrudes in the sliding direction in which the slider 30 slides with respect to the head body 21a so that the slide fastener 1 is closed. When the element 20 moves into the element guide passage of the slider 30 , the engaging convex portion 24 protrudes toward the shoulder mouth instead of the rear mouth side of the slider 30 .

Therefore, when the slider 30 is slid in the slide fastener closing direction, the element 20 moving from the shoulder side of the slider 30 into the element guide path moves easily in the tape width direction near the shoulder of the slider 30 . However, in the present embodiment 1, since the leg portion 23 of the fastener element 20 is bent toward the front in the same direction as the protruding direction of the engaging convex portion 24 relative to the head body 21a, even if the fastener element 20 is near the shoulder of the slider 30 It is also difficult for the leg part 23 of the fastener element 20 to damage the flange part 36 even if it moves and contacts, for example, the left and right flange parts 36 of the slider 30 .

In addition, since the fastener element 20 located near the rear mouth of the slider 30 is in an engaged state, and its position in the tape width direction is limited by the left and right flange portions 36 of the slider 30, the fastener element 20 is positioned on the side of the slider 30. The vicinity of the back mouth is not easy to move along the belt width direction.

Therefore, even if the leg portion 23 of the fastener element 20 is bent forward, for example, the slider 30 slides in the direction in which the slide fastener 1 is opened, and the left and right fastener elements 20 in the engaged state enter the fastener element guide passage from the rear opening of the slider 30. When moving, it is not easy for the legs 23 of the fastener elements 20 to catch on the left and right flanges 36 of the slider 30 to cause damage.

And, in the slide fastener 1 of the present embodiment 1, since the legs 23 of the fastener elements 20 are bent forward, for example, as shown in FIG. The distance between 23 and the plunger 7 or the seat bar 8 arranged adjacent to the rear end of the element row 12 gradually increases toward the tip of the leg 23 .

Thereby, the partial flexibility of the portion between the fastener element 20 and the insertion rod 7 or between the fastener element 20 and the seat bar 8 of the fastener chain 10 can be improved, so that, for example, the insertion rod 7 or the seat rod 8 can be easily The orientation is inclined to the tape width direction with respect to the element rows 12 .

By inclining the direction of the plunger 7 or the seat rod 8 in this way, the operation of inserting the plunger 7 into the socket 9 through the element guide passage of the slider 30 and the insertion of the plunger 7 from the socket 9 through the socket 9 can be performed more smoothly. The element guide passage of the slider 30 is pulled out. Therefore, the operability of the separation insert 6 can be improved.

In addition, in the first embodiment, the split insert 6 is constituted by including the plunger 7, the seat bar 8, and the socket 9 as described above, but the present invention is not limited thereto, and the present invention can be similarly applied to, for example, a A case where a separate insert is provided on a so-called double-open type slide fastener that separates the left and right fastener stringers on both the front and rear sides.

For example, two sliders are installed on the chain element rows of the left and right fastener belts in such a way that the rear mouths of each other are opposite and can slide, and the insertion rod is fixed at the rear end of one fastener chain, and the other tooth The rear end portion of the fastener tape fixes the plunger to constitute the split insert for the double-open slide fastener, and the socket provided in the usual split insert is not provided.

In addition, in the case of manufacturing the fastener element 20 of the above-mentioned embodiment 1, after forming the engaging convex portion 24 and the engaging concave portion 25 on the flat wire 40, as shown in FIG. The fastener element 20 is manufactured by punching the surface (first main surface) side with the meshing convex part 24 facing up.

However, in the present invention, it is also possible to use, for example, a cutting die 48 and a cutting punch 47 as shown in FIG. The fastener element 20 is manufactured by performing punching so that the surface (2nd main surface) side in which the meshing recessed part 25 was formed of the flat wire 40 faces a top.

In this case, punched holes 48 a having a cross-sectional shape corresponding to the outer peripheral shape of the fastener element 20 are formed in the punching die 48 . In addition, at the tip end of the cutting punch 47, there are provided a head-side flat portion 47a having a flat surface abutted against a portion of the flat wire 40 corresponding to the head body 21a and the trunk portion 22, and an insertion protrusion 47b. It protrudes from the head-side flat portion 47a and is inserted into the engagement recess 25; and a leg forming portion 47c has a curved surface that is concavely curved in a downward direction with respect to the flat surface of the head-side flat portion 47a. .

The flat wire material 40 formed with the engaging convex portion 24 and the engaging concave portion 25 is punched by using the cutting punch 47 and the punching die 48 so that the cutting punch 47 abuts against the face on the rear surface side of the fastener element 20 . The cutting process can plastically deform the leg portion 23 of the punched fastener element 20 to engage with the convex portion with respect to the front surface and the rear surface of the head main body 21a while punching the fastener element 20 having a predetermined outer peripheral shape. The protruding direction of 24 is a curved shape that is obliquely bent.

In addition, in this case, by inserting the insertion protrusion 47b protruding from the tip end of the cutting punch 47 into the engagement recess 25 formed in advance on the flat wire 40, the punching of the flat wire 40 can be easily and stably inserted. The cut portion is positioned relative to the cutting punch 47 and the punching die 48 , and can prevent deformation of the engaging recess 25 when punching the fastener element 20 , stably maintaining the shape of the engaging recess 25 .

And the fastener element 20 in which a pair of leg part 23 bifurcated can be obtained by performing the above-mentioned punching process. In this case, when punching the fastener element 20, the front surface side of the front-end|tip part of the leg part 23 of the fastener element 20 may be cut and the chamfer part 23b may be formed. Next, the single-sided fastener element of the present invention can be produced by performing a process of forming the chamfered portion 23b at the tip of the leg portion 23 on the produced fastener element 20 as necessary, and then performing a grinding process, a coating process, and the like.

Example 2

Fig. 11 is a front view of the fastener element of the second embodiment seen from the tape length direction, and Fig. 12 is a cross-sectional view of the fastener element.

In this Example 2, the shape of each fastener element is different from the aforementioned Example 1, but other structures are the same as those of the aforementioned Example 1 slide fastener. Therefore, in the second embodiment, the fastener elements will be mainly described.

The slide fastener according to the second embodiment has a pair of left and right fastener tapes in which a plurality of elements 50 are arranged in a row on the tape side edges of the left and right fastener tapes to form a row of fastener elements, and is arranged so as to be slidable along the row of fastener elements. The slider, the top stop arranged adjacent to the front end side of the element row, and the separation insert arranged adjacent to the rear end side of the element row.

The element 50 of the second embodiment is formed of metal such as copper, copper alloy, aluminum alloy, or the like. As shown in FIGS. 11 and 12 , the fastener element 50 includes an engaging head 51 having an engaging protrusion 54 and an embedded space 55 , a main body 52 protruding from one end of the engaging head 51 , and one end of the main main body 52 . A pair of leg portions 53 that branch out in two.

In addition, the fastener element 50 is configured as a double-sided fastener element, and a set of engaging protrusions 54 and fitting spaces 55 are arranged on the front surface (first main surface) side and the rear surface (second main surface) side of the engaging head 51 respectively. , and the fastener element 50 is formed symmetrically with respect to the center position in the width direction of the fastener element (belt front and back directions).

The engaging head 51 of the present embodiment 2 includes a head main body 51a with a constant element thickness dimension (dimension in the belt length direction) between the front surface and the rear surface, a protrusion provided on the front surface of the head main body 51a, and a protrusion provided on the front surface of the head main body 51a. The engagement protrusion 54 on the rear surface, and the left and right protrusions 57 protruding from the main body 52 on the front surface of the head main body 51a toward the outside of the belt (head tip side), and the main body 52 on the rear surface of the head main body 51a. The left and right protruding portions 57 protrude toward the outside of the belt (head tip side).

The head main body 51 a of the engaging head 51 is arranged to have a predetermined thickness, and a height difference is formed from the trunk portion 52 to reduce the element thickness dimension. The front and rear surfaces of the head body 51a are respectively formed as flat surfaces (flat surfaces parallel to the tape width direction) perpendicular to the tape length direction, and the head body 51a has a constant dimension in the tape length direction.

When this engaging head 51 is viewed from the front side as shown in FIG. The size of the fastener element in the width direction is smaller and inclined or bent relative to the fastener element length direction.

The engaging protrusions 54 disposed on the front and rear sides of the head main body 51a protrude from the front and rear surfaces of the head main body 51a in a mountain shape at the center in the element width direction, respectively, and are formed in predetermined positions. The distance separates the position from the main body 52 .

The left and right protrusions 57 protrude from the head main body 51 a at positions separated from each other to have a predetermined element thickness dimension, and protrude forward from the main body 52 toward the left and right lateral sides of the engaging protrusion 54 . In this case, a predetermined gap is provided between the engaging convex portion 54 and the left and right projecting portions 57 . In addition, the front surface and the rear surface of the left and right extension parts 57 are arrange|positioned on the same plane as the front surface and the rear surface of the main body part 52, respectively.

In the engagement head 51 of the second embodiment, the fitting space surrounded by the engagement protrusion 54 , the left and right protrusions 57 , and the main body 52 is respectively formed on the front surface side and the rear surface side of the head main body 51 a. 55. Each fitting space part 55 has the bottom surface 55a whose height position in the element thickness direction (tape length direction) of this bottom surface 55a is set to the same position as the front surface and the rear surface of the head main body 51a, respectively.

The trunk portion 52 of the second embodiment protrudes from the bottom surface 55a of the insertion space 55 in the element thickness direction, and the element thickness dimension of the trunk portion 52 is formed larger than the element thickness dimension of the head body 51a of the engaging head 51. . The trunk portion 52 is arranged from the end edge position of the bottom surface 55 a of the fitting space 55 to the tape clamping surface 56 of the bifurcated portion that branches the pair of leg portions 53 in the element length direction (tape width direction).

That is, in the second embodiment, the trunk portion 52 refers to the portion arranged from the end edge position of the bottom surface 55a of the fitting space portion 55 to the position of the tape clamping surface 56 of the bifurcated portion in the longitudinal direction of the fastener element. The portion disposed on the belt outer side of the main body portion 52 is referred to as the engaging head portion 51 , and the portion disposed on the belt inner side of the main body portion 52 is referred to as the leg portion 53 .

The legs 53 of the present embodiment 2 protrude from the main body 52 to the inside of the belt, and hook-shaped bends that bend toward each other (inwardly) are arranged at the tip regions (end regions inside the belt) of the pair of legs 53. Section 53a. Moreover, the inner peripheral surface of the trunk part 52 and a pair of leg part 53 is arrange|positioned parallel to a tape longitudinal direction, and this inner peripheral surface becomes the tape clamping surface 56 which closely contacts a fastener tape.

In addition, in the fastener element 50 of the second embodiment, the pair of leg parts 53 is positioned relative to the head part so that the front end part of the leg part 53 is located in front of the base end part (the end part on the side of the trunk part 52 ). The front surface and the rear surface (or belt width direction) of the main body 51a bend and protrude obliquely.

In this case, the front surface of the portion of the leg 53 other than the tip is formed as a curved surface that is concavely curved so that the tip of the leg 53 (belt inner side) is located on the front side. Also, the rear surface of the leg portion 53 is formed as a curved surface that is convexly curved so as to be located on the front side as it gets closer to the tip of the leg portion 53 (inner side of the belt). In addition, the thickness dimension (dimension in the belt longitudinal direction) of the portion other than the tip portion of the leg portion 53 is substantially constant as a whole.

In addition, in the present invention, the pair of leg portions 53 may protrude obliquely in a straight line with respect to the tape width direction so that the distal end portion of the leg portion 53 is positioned more forward than the base end portion.

In addition, in order to make the hand and skin feel of the fastener element 50 good and to prevent the fastener element 50 from being caught on the slider when the slider slides, an inverted surface is provided on the front surface side of the top end of the leg portion 53 in the second embodiment. Corner 53b. This chamfered part 53b is comprised by the surface parallel to the front surface and the rear surface of the head main body 51a.

In this case, the curved shape of the leg 53 is formed so that the position of the front surface of the tip of the leg 53, that is, the position of the flat surface of the chamfered portion 53b, is arranged on the chain on the mating object side in the belt length direction. In the area where the head body 51a of the teeth 50 is formed.

Furthermore, in the second embodiment, the insertion depth of the engagement protrusion 54 into the engagement recess 55 of the fastener element 50 on the mating partner side in the belt length direction is greater than that of the engagement protrusion 54 from the head in the belt length direction. The ratio of the protrusion dimension by which the front surface of the main body 51a protrudes is set to 65% or more and 85% or less.

By setting the ratio of the insertion depth of the engaging protrusion 54 to the protruding dimension to be 65% or more, the engaging strength of the slide fastener 1 can be increased, and desired lateral tensile strength and top strength can be stably ensured. Moreover, by making this ratio 85% or less, the meshing of the element row 12 on either side can be prevented from being too strong, and the suitable flexibility of a slide fastener and the favorable sliding property of a slider can be ensured stably.

In addition, in the second embodiment, the boundary between the flat front and rear surfaces of the main body 52 arranged so as to be perpendicular to the belt longitudinal direction and the curved surface of the leg portion 53 obliquely bent with respect to the flat surface The position is set at the boundary between the trunk portion 52 and the leg portion 53 . However, in the present invention, the boundary position between the flat surface of the main body 52 and the curved surface curved relative to the flat surface may be set in the formation area of the main body 52 in the element length direction (tape width direction). Inside.

In the case of manufacturing the fastener element 50 of the second embodiment as described above, first, by using a pair of upper and lower dies, a flat wire material formed of metal such as copper, copper alloy, aluminum alloy, etc. is press-worked to make the flat wire material partially plastic. Deformation, the engaging protrusion 54 and the fitting space 55 are formed on both surfaces of the flat wire rod at predetermined intervals.

Next, the flat wire material on which the engaging protrusion 54 and the fitting space 55 are formed is punched along the outer peripheral shape of the fastener element 50 using a cutting punch and a punching die.

In this case, a punched hole having a cross-sectional shape corresponding to the outer peripheral shape of the fastener element 50 is formed on the punching die. In addition, the top end of the cutting punch is at least provided with: a head-side flat portion having a flat surface abutting against the head main body 51a of the flat wire; and a leg forming portion having a curved surface obliquely curved with respect to the flat surface of the head side flat portion.

By performing the punching process using the cutting punch and the punching die, it is possible to punch out the fastener element 50 having a predetermined outer peripheral shape while plastically deforming the leg portion 53 of the punched fastener element 50 so as to be opposite to the head portion. The front and rear surfaces of the main body 51a and the trunk portion 52 are obliquely curved curved shapes. And the fastener element 50 of this Example 2 can be manufactured by performing a grinding process, a coating process, etc. to the produced fastener element 50.

The fastener element 50 of the present embodiment 2 manufactured in the above-mentioned manner has a form in which a pair of leg portions 53 are split. The process of caulking the leg parts 53 in the inner direction approaching each other can manufacture the fastener tape which attached the element 50 to the fastener tape. Moreover, the slide fastener chain can be obtained by combining the manufactured fastener stringers in pairs, and meshing the element rows of each fastener stringer.

The slide fastener of this Example 2 comprised using the slide fastener chain produced in this way completely differs in appearance quality from the conventional slide fastener which has normal fastener elements. Moreover, the attitude|position of the element 50 with respect to the fastener tape can be hold|maintained stably by forming the leg part 53 into a curved shape and being fixed to the fastener tape.

And, in the slide fastener of the present embodiment 2, regardless of whether the leg portion 53 is formed in a curved shape, the front surface and the rear surface of the head body 51a are arranged parallel to the tape width direction, and the engaging head 51 of each fastener element 50 It is almost the same as the meshing head of conventional fastener elements.

Thereby, in the slide fastener of this Example 2, the element row on either side can be meshed smoothly by sliding a slider, and the favorable sliding property of a slider can be ensured stably. In addition, it is possible to stably obtain transverse tensile strength and top strength equal to or higher than conventional slide fasteners having common elements.

Explanation of reference signs

1. Zipper; 5. Top stop; 6. Separation insert; 7. Insert rod; 8. Seat rod; 9. Socket; 10. Tooth chain belt; 11. Zipper belt; 12. Chain element row; 20. Chain Teeth; 21, engaging head; 21a, head main body; 22, trunk; 23, leg; 23a, bending portion; 23b, chamfering portion; 24, engaging convex portion; 25, engaging concave portion; 26, belt clip Holding surface; 30, slider; 31, slider body; 32, pull piece; 33, upper wing plate; 34, lower wing plate; 35, guide column; 36, flange part; 37, pull piece installation column; 40 , flat wire rod; 41a, 41b, mold; 42, cutting punch; 42a, head side flat part; 42b, receiving concave part; 42c, leg part forming part; 42d, chamfer part forming part; 43a, punching; 47, cutting punch; 47a, head side flat part; 47b, insertion protrusion; 47c, leg forming part; 48, punching die; 48a, punching; 50, chain element; 51, Engaging head; 51a, head main body; 52, main body; 53, leg; 53a, bending part; 53b, chamfering part; 54, engaging convex part; 55, embedded space part; Clamping surface; 57, protruding part; a, the interval between the head bodies of adjacent chain elements; b, the insertion depth of the engaging convex part; c, the protruding dimension of the engaging convex part; D, the head main body Formation area.

Claims (13)

1. A zipper chain, comprising a pair of zipper belts (10), this pair of zipper belts (10) has a left and right pair of zipper belts (11) and utilizes riveting processing to be installed on the zipper along the belt length direction A plurality of metal fastener elements (20) with side edge portions facing each other of the belt (11), the fastener elements (20) having an engaging head (21) arranged at one end of the engaging head (21) The main part (22) on the side, and a pair of legs (23) branched from one end of the main part (22) into two strands to protrude, and the engaging head (21) includes a first main surface and a head main body (21a) on a second main surface opposite to the first main surface, an engagement protrusion (24) protruding from the first main surface of the head main body (21a), and The engagement recess (25) provided on the second main surface of the head main body (21a) is recessed, and the zipper chain is characterized in that, The first main surface and the second main surface of the head main body (21a) are flat surfaces perpendicular to the belt length direction, The pair of legs (23) are obliquely bent or projected obliquely with respect to the first main surface and the second main surface of the head main body (21a). 2. The fastener chain according to claim 1, wherein: The pair of legs (23) are bent or inclined relative to the first main surface and the second main surface of the head main body (21a) in a protruding direction of the engaging protrusion (24). 3. A slide fastener chain comprising a pair of fastener tapes having a left and right pair of fastener tapes and tape side edge portions opposite to each other mounted on the tapes along the tape length direction by riveting A plurality of metal fastener elements (50), the fastener element (50) has an engaging head (51), a trunk portion (52) disposed on one end side of the engaging head (51), and a One end of the main body (52) is branched into a pair of legs (53) protruding in two strands, and the engaging head (51) includes a first main surface and a second main surface opposite to the first main surface. The head main body (51a) on the main surface, the engaging convex part (54) protruding from the first main surface and the second main surface of the head main body (51a), and the first main surface and an insertion space (55) between the engaging protrusion (54) on the second main surface side and the main body (52) for fitting the engaging protrusion (54) of the engaging object, the The zipper chain is characterized in that, The first main surface and the second main surface of the head main body (51a) are flat surfaces perpendicular to the belt length direction, The pair of legs (53) are obliquely bent or projected obliquely with respect to the first main surface and the second main surface of the head main body (51a). 4. The fastener chain according to any one of claims 1 to 3, wherein: The surface of the tip of the leg (23, 53) on the same side as the first main surface of the engaging head (21, 51) is the first surface of the tip of the leg (23, 53). 1 main surface, the forming area ( D) inside. 5. The fastener chain according to any one of claims 1 to 4, wherein: The engagement protrusion (24, 54) is inserted into the engagement recess (25) of the fastener element (20, 50) on the side of the engagement partner or the insertion space (55) in the belt length direction The depth is set to be 65% or more in proportion to the protruding dimension of the engaging protrusion (24, 54) protruding from the first main surface of the head main body (21a, 51a) in the belt length direction Below 85%. 6. The fastener chain according to any one of claims 1 to 5, wherein: The engagement protrusions (24, 54) When the depth of insertion into the engagement recess (25) or the insertion space (55) of the fastener element (20, 50) on the engagement partner side in the belt length direction is b, The value of b/a is set to not less than 0.25 and not more than 0.30. 7. The fastener chain according to any one of claims 1 to 6, wherein: The first main surface of the leg part (23, 53) has the first main surface and the second main surface of the head body (21a, 51a) at the tip part of the leg part (23, 53). Face-parallel chamfer faces. 8. A zipper, characterized in that, The slide fastener is constituted by attaching a slider (30) to an element row (12) formed of a plurality of elements (20, 50) of the slide fastener chain according to any one of claims 1 to 7, The pair of legs (23, 53) slide toward the slider (30) with respect to the first main surface and the second main surface of the head body (21a, 51a) so that the pair of legs The sliding direction of the engagement of the tooth chain belt (10) is bent or inclined. 9. The zipper according to claim 8, wherein, The zipper comprises a separate insert (6) having a plunger (7) fixed to the rear end of one said tooth chain (10) and fixed to the other said tooth chain ( 10) the seat post (8) at the rear end, Arranged between the legs (23, 53) of the rearmost fastener elements (20, 50) of the fastener element row (12) and the insertion rod (7) or the seat rod (8) The interval of increases gradually towards the top end of the legs (23, 53). 10. A manufacturing method of a fastener element, the method is used for manufacturing a metal fastener element (20), the metal fastener element (20) having an engaging head (21), a A main part (22) on one end side, and a pair of engaging protrusions (24) branched into two strands from one end of the main part (22), and protruding. The engaging head (21) includes a first main part The head main body (21a) on the second main surface opposite to the first main surface, the engaging convex part (24) protruding from the first main surface of the head main body (21a), and a bottomed engagement recess (25) recessed on the second principal surface of the head main body (21a), the manufacturing method of the fastener element is characterized in that, The manufacturing method comprises the following steps: Pressing and forming a metal flat wire (40) to form the engaging convex portion (24) and the engaging concave portion (25); Using dies (43, 48) and cutting punches (42, 47) to form the part of the flat wire (40) formed with the engaging convex portion (24) and the engaging concave portion (25) into In the fastener element (20), the cutting punch (42, 47) has a head side flat portion (42a, 47a) having a flat surface abutting against the head body (21a) at the tip end of the punch, and leg forming portions (42c, 47c) that are obliquely bent or inclined relative to the flat surfaces of the head side flat portions (42a, 47a); and When punching the fastener element (20), the pair of leg parts (23) are obliquely bent or inclined with respect to the first main surface and the second main surface of the head body (21a). 11. The manufacturing method of the fastener element according to claim 10, wherein, The cutting punch (42, 47) has a receiving recess (42b) or an insertion protrusion (47b), and the receiving recess (42b) is recessed on the head side flat part (42a) for receiving the engaging A convex portion (24) protruding from the head-side flat portion (47a), the insertion protrusion (47b), can be inserted into the engaging concave portion (25). 12. The manufacturing method of the fastener element according to claim 10 or 11, wherein, The manufacturing method includes the steps of: When punching the fastener element (20), after the head-side flat portion (42a) is brought into contact with the flat wire (40) to start punching, the leg forming portion (42c) and the The pair of legs (23) are bent or inclined by contacting the flat wire (40). 13. The manufacturing method of the fastener element according to any one of claims 10 to 12, wherein: The manufacturing method comprises the following steps: The leg forming portion (42c) is provided with a surface bent or inclined in a direction opposite to the punching direction with respect to the flat surface of the head side flat portion (42a); and At the position of the punching die (43) corresponding to the top end of the leg (23) of the fastener element (20), there is a flat surface corresponding to the head side flat portion (42a). A chamfer forming part (42d) of a plane parallel to the plane.