WO2014112100A1

WO2014112100A1 - Fastener element and fastener stringer

Info

Publication number: WO2014112100A1
Application number: PCT/JP2013/050927
Authority: WO
Inventors: 博文谷越; 隼人石井; 昌洋草山; 太古里; 将通山縣
Original assignee: Ykk株式会社
Priority date: 2013-01-18
Filing date: 2013-01-18
Publication date: 2014-07-24
Also published as: CN104955352A; TWI532446B; EP2946683A4; TW201438620A; CN104955352B; EP2946683A1; EP2946683B1

Abstract

This fastener element (10, 20, 30, 40) is configured in such a manner that the thickness of the outer peripheral edges of a body section (12, 22, 42) and of leg sections (13, 23, 43), the thickness being measured between a first main surface and a second main surface, is constant, and a thinned section (16, 26, 36) having a smaller thickness than the outer peripheral edges is provided at at least part of the inner peripheral edges of the body section (12, 22, 42) and of the leg sections (13, 23, 43), the inner peripheral edges being located on the first main surface side and the second main surface side. As a result of this configuration, even if fastener stringers (1) are produced while the mounting pitch of fastener elements (10, 20, 30, 40) is reduced, a reduction in the flexibility and flexuousness of the fastener stringers (1) is minimized.

Description

Fastener elements and fastener stringers

The present invention relates to a metal fastener element for a slide fastener, and in particular, even if the slide fastener is configured by reducing the mounting pitch with respect to the fastener tape, the decrease in the flexibility of the fastener stringer and the decrease in the sliding property of the slider are suppressed. The present invention relates to a metal fastener element that can be used.

Generally, a metal fastener element has a meshing head, a trunk extending from the meshing head to one side (rear), and a pair of left and right legs branching from the trunk to bifurcated and extending to one (rear) Part. Further, the meshing head is provided with a meshing convex part and a meshing concave part or a fitting space part into which the meshing convex part of the mating fastener element is fitted.

As a kind of metal element, a so-called single-sided fastener element (hereinafter simply referred to as a single-sided element) in which a meshing convex portion is provided on one surface (upper surface) side of the meshing head and a meshing concave portion is provided on the other surface (lower surface) side. And a so-called double-sided type fastener element (hereinafter sometimes simply referred to as a double-sided element) in which a pair of meshing convex portions and fitting space portions are provided on both upper and lower surfaces of the meshing head. It has been.

Here, as an example of a single-sided element, a single-sided element disclosed in Japanese Utility Model Publication No. 50-10889 (Patent Document 1) will be described. The single-sided element described in Patent Document 1 has a meshing head, a trunk, and a pair of left and right legs, and a meshing convex portion is provided on the upper surface side of the meshing head. A meshing recess is provided on the lower surface side of the.

Further, in the single-sided element of Patent Document 1, the left and right leg portions are disposed on the base end side of the leg portion, and are disposed on the thick portion having a predetermined thickness and the distal end portion side of the leg portion. And a thin portion in which the thickness of the fastener element is reduced through a step with respect to the meat portion.

In this case, when the fastener element is viewed from the upper surface side, the thin wall portion of the leg portion is arranged from the inner periphery (edge on the tape contact side) of the leg portion to the outer edge (edge on the side exposed to the outside). Has been. Further, the step that becomes the boundary between the thick part and the thin part is curved and arranged on the side of the meshing head from the inner periphery of the leg part toward the outer edge of the fastener element. In the outer edge part of a fastener element, it distribute | arranged over the wide range from the front-end | tip of a leg part to a part of trunk | drum.

When the fastener element of Patent Document 1 having such a configuration is attached to the tape side edge portion of the fastener tape at a predetermined pitch along the tape length direction by caulking, the above-described fastener element is attached to each fastener element as described above. Since the thin portion is provided, the portion where the thin portion is formed has a smaller (thinner) contact portion of the fastener element with the fastener tape than the thick portion, and the spacing between adjacent fastener elements Becomes wider.

Therefore, at the tape side edge of the fastener tape, the rigidity due to the attachment of the fastener element is alleviated and the flexibility of the fastener stringer is enhanced. Further, the improvement of the flexibility of the fastener stringer can reduce the sliding of the slider.

On the other hand, an example of a double-sided element is disclosed in US Pat. No. 2,622,295 (Patent Document 2). As shown in FIG. 16, the double-sided element 80 described in Patent Document 2 has a meshing head 81, a body 82, and a pair of left and right legs 83, and the center in the element thickness direction. It is configured symmetrically with respect to the position.

The meshing head 81 of Patent Document 2 includes a thin plate-like head main body (also referred to as a base) 81a, a pair of meshing convex portions 84 and a fitting space portion 85 arranged on the upper surface side of the head main body 81a, It has a pair of meshing convex parts 84 and a fitting space part 85 arranged on the lower surface side of the part main body 81a.

On the left and right sides of each insertion space portion 85 arranged on the upper surface side and the lower surface side of Patent Document 2, left and right side wall portions 86 continuing from the meshing convex portion 84 are erected from the head body 81a. Three portions of the insertion space portion 85 are surrounded by the portion 84 and the left and right side wall portions 86. Further, on the rear side of the insertion space portion 85, a bottom surface 85 a of the insertion space portion 85 is arranged to extend to the position of the crotch portion 87 via the body portion 82 of the fastener element 80.

In the body portion 82 of Patent Document 2, an insertion space portion 85 and left and right side wall portions 86 are continuously provided from the meshing head portion 81 toward the leg portion 83 side. An inclined portion 88 that gradually increases the thickness direction dimension (thickness dimension) of the fastener element 80 from the meshing head 81 toward the leg 83 is disposed on the outside.

The left and right leg parts 83 in Patent Document 2 are a leg part body 83a extending from the body part 82 with a certain thickness dimension, and a bulging part 83b slightly bulging inward from the inner peripheral surface of the leg part body 83a. And have. In this case, the bulging portion 83b is arranged at the center portion in the thickness direction of the leg portion 83, and the upper surface and the lower surface of the bulging portion 83b form the same plane as the bottom surface 85a of the fitting space portion 85. Yes. According to Patent Document 2, the bulging amount (projection height) at which the bulging portion 83b bulges from the inner peripheral surface of the leg main body 83a is set to be extremely small, about 1 / 1000th of an inch. .

In Patent Document 2, the punch line when punching the fastener element 80 from the rolled material with a punch and a die is formed between the bulging portion 83b that is thinner than the leg portion main body 83a and the head main body 81a of the meshing head 81. By setting on the boundary line, the bulging portion 83 b as described above is formed on the inner peripheral surface of the leg portion 83. According to Patent Document 2, by setting a punch line at such a position, the lifetime of the punch and the die is extended, and the maintenance cost is reduced.

Further, the fastener element 80 of Patent Document 2 shown in FIG. 16 presses each leg 83 in a direction approaching each other with the fastener tape sandwiched between the left and right legs 83 to crimp the fastener element 80. Thus, it is attached to the fastener tape.

In this case, in the fastener element 80 of Patent Document 2, the bulging amount of the bulging portion 83b bulging from the inner peripheral surface of the leg main body 83a is extremely small as described above. For this reason, when the fastener element 80 is crimped and attached to the fastener tape, the entire inner peripheral surface of the leg main body 83a is pressed against the fastener tape by the action of the elastic force of the fastener tape, and the outer surface of the bulging portion 83b. The whole is pressed against the fastener tape. Therefore, the fastener element 80 can firmly hold the fastener tape with the left and right leg portions 83, thereby increasing the attachment strength of each fastener element 80 to the fastener tape.

Japanese Utility Model Publication No. 50-10889 US Pat. No. 2,622,295

As described above, the fastener element (single-sided element) described in Patent Document 1 has thin portions formed on the left and right leg portions from the inner peripheral edge to the outer edge. When attached to the side edge of the tape, the tape contact portion (contact area) of the fastener element is reduced, and as a result, the flexibility of the fastener stringer is enhanced.

However, in the case of the fastener element of Patent Document 1, since the thin portion is formed to the outer edge of the leg portion and the trunk portion, when the slide element is configured by attaching the fastener element to the fastener tape, There was a problem that the formed thin portion was exposed to the outside, and the appearance and appearance of the slide fastener were impaired.

Also, as in Patent Document 1, when the thin part is formed up to the outer edges of the leg part and the trunk part, the outer surface of the fastener element and the tip surface on the leg part side are thin, for example, the slider of the slide fastener is closed. When the slider element is slid in the direction, the tape contact area of the fastener element is reduced as described above, and the contact area with the element guide surface inside the slider of each fastener element that has entered the element guide path of the slider Therefore, the posture of each fastener element is easily inclined in the element guide path of the slider. As a result, there is a possibility that problems such as poor meshing of the left and right fastener elements, and the fastener elements being caught in the element guide path of the slider may occur.

On the other hand, in the fastener element (double-sided element) 80 of Patent Document 2 shown in FIG. 16, the entire inner peripheral surface of the leg main body 83a and the entire outer surface of the bulging portion 83b are pressed against the fastener tape as described above. The leg portion 83 ensures a large gripping area (contact area) for gripping the fastener tape. For this reason, the attachment strength with respect to the fastener tape of each fastener element 80 is raised.

However, in the fastener element 80 of Patent Document 2, the bottom surface 85a of the insertion space portion 85 arranged on the upper surface side and the lower surface side of the element extends to the position of the crotch portion 87 via the body portion 82 of the fastener element 80. A central portion of the trunk portion 82 along the crotch portion 87 is formed by a thin portion having a thickness dimension smaller than that of the leg main body 83a.

Therefore, in the fastener element 80 of Patent Document 2, the strength of the central portion of the body portion 82 formed of a thin portion is not high, and therefore, when the fastener element 80 is attached to the fastener tape by caulking, Along with the plastic deformation, the thin central portion of the body portion 82 is also easily deformed. As a result, troubles such as the attachment position of the fastener element 80 being easily displaced with respect to the fastener tape and the posture of the fastener element 80 being easy to tilt occur, which causes a decrease in the yield in manufacturing the slide fastener. It was one.

By the way, in recent years, in the slide fastener in which the double-sided element 80 is attached to the fastener tape as in Patent Document 2, the attachment pitch of the double-sided elements 80 in the tape length direction is narrowed and exposed between the fastener elements 80 in the element row. By making the fastener tape to be difficult to see, a slide fastener having a higher design or higher quality than the conventional one has been provided.

However, for example, when the double-sided element 80 of Patent Document 2 is attached to a fastener tape with the attachment pitch being narrowed, the contact area between each fastener element 80 and the fastener tape (tape attachment area of the fastener element 80) is each fastener. Since it is ensured by the thickness dimension of the leg part 83 of the element 80, the tape area | region of the fastener tape between the fastener elements 80 necessarily becomes narrow.

In this case, since the fastener tape is firmly held by the fastener element 80 at the portion where the fastener element 80 of the fastener tape is in contact, the tape length increases as the mounting pitch of the fastener element 80 is reduced as described above. The tape contact area of the fastener element 80 per unit length in the direction becomes large, and the softness and ease of bending of the fastener tape are lost. As a result, the flexibility of the fastener stringer is reduced, and the tape front and back direction and the tape width direction are also reduced. There was an adverse effect of reducing the flexibility.

Furthermore, when the flexibility and flexibility of the fastener stringer are reduced in this way, for example, when the slider is slid in a slide fastener, the left and right fastener stringer element rows are formed in a Y-shaped element formed in the slider. Since it becomes difficult to curve along the guide path, there is also a problem that the sliding property of the slider is lowered.

Furthermore, when the double-sided element 80 is attached by crimping to the fastener tape, generally, in order to stabilize the attachment of the double-sided element 80, the fastener tape is pulled in the tape length direction, and the tension in the tape length direction is applied to the fastener tape. The attachment work of the double-sided element 80 is performed in the given state. Moreover, after the attachment work of the double-sided element 80 is finished, the tension applied to the fastener tape is released, and the fastener tape contracts in the tape length direction.

When the attachment work of the double-sided element 80 is performed in this way, when the tension of the fastener tape is released after the attachment work is finished, the fastener tape is in the tape length direction in the tape portion where the double-sided element 80 is attached. Since it is difficult to shrink, the shrinkage amount of the element attachment portion of the fastener tape is smaller than that of the tape main portion of the fastener tape.

In this case, if the mounting pitch of the double-sided element 80 is narrow as described above, the difference in contraction amount between the element mounting portion and the tape main portion increases, so that the fastener stringer to which the fastener element 80 is attached has a fastener. There is a problem called puckering (or bias) in which the entire fastener stringer is curved in the tape width direction so that the element mounting portion side of the tape is convex and the end side opposite to the element mounting portion of the fastener tape is concave. It sometimes occurred.

The present invention has been made in view of the above-described conventional problems, and a specific object thereof is to increase the flexibility of the fastener stringer and at the same time, the posture of the fastener element in the element guide path of the slider when the slider slides. In addition, even if the fastener element mounting pitch in the tape length direction is narrowed, the flexibility and flexibility of the fastener stringer, the sliding property of the slider, and the puckering are reduced. It is an object of the present invention to provide a fastener element capable of making it difficult to cause problems such as occurrence.

In order to achieve the above object, a fastener element provided by the present invention includes, as a basic configuration, a meshing head, a body portion disposed on one end side of the meshing head, and one end of the body portion. A thin plate-like head having a pair of left and right legs bifurcated and extending, the meshing head having a first main surface and a second main surface opposite to the first main surface A main body, a meshing convex portion protruding from the first main surface and the second main surface of the head main body, the meshing convex portion and the body portion on the first main surface side and the second main surface side, A metal fastener element having a taped surface on the inner peripheral surface of the body portion and the left and right leg portions. And the body portion is arranged between the insertion space portion and the tape clamping surface from the position of the bottom surface of the insertion space portion. A bridge portion that protrudes in the thickness direction and connects the left and right leg portions, and the trunk portion and the left and right leg portions are an inner peripheral edge portion disposed along the tape clamping surface, An outer edge disposed along the outer surface of the element, wherein the outer edge has a constant thickness dimension between the first main surface and the second main surface, At least a part of the inner peripheral edge on the main surface side and the inner peripheral edge on the second main surface side is provided with a thinned portion in which the thickness dimension is reduced from the outer edge. It is the main feature.

In addition, a fastener element according to another embodiment provided by the present invention includes, as a basic configuration, a meshing head, a trunk disposed on one end side of the meshing head, and a fork from one end of the trunk. A pair of left and right legs branched and extended, the meshing head includes a first main surface and a head main body having a second main surface opposite to the first main surface; A meshing convex portion projecting from the first main surface of the head main body, and a meshing concave portion recessed in a bottomed shape from the second main surface of the head main body, And a metal fastener element having a tape clamping surface on the inner peripheral surface of the left and right leg parts, wherein the body part and the left and right leg parts are arranged along the tape clamping surface. A peripheral edge portion and an outer edge portion arranged along the outer surface of the left and right elements, wherein the outer edge portion includes the first main surface and the second edge surface. A thickness dimension between the first main surface side and the inner peripheral edge portion on the second main surface side is set to at least a part of the outer peripheral surface. The main feature is that the thinned portion reduced from the edge portion is arranged.

In the fastener element according to the present invention as described above, it is preferable that the thinned portion has an inclined surface or a curved surface that gradually decreases the thickness dimension toward the tape clamping surface. Moreover, in the fastener element which concerns on this invention, the said thinning part may be provided with the recessed part which notched in the step shape at the said tape clamping surface side.

In the fastener element according to the present invention, the thinning portion is continuously arranged from the tip portion of one leg portion to the tip portion of the other leg portion via a crotch portion arranged on the trunk portion. It is preferable that

Moreover, the said thinning part may be partially distribute | arranged to a part of said inner peripheral part. In this case, the said thinning part is distribute | arranged to the continuous area | region ranging from the base end part of the said right-and-left leg part and the crotch part distribute | arranged to the said trunk | drum, or the front-end | tip of the said left-right leg part It is particularly preferable that each be arranged in each part.

In the fastener element according to the present invention, in the plan view of the fastener element, the thinned portion has a dimension of 5% or more and 50% or less of the dimension between the tape clamping surface and the outer surface of the leg portion. It is preferable that it is arranged.
Furthermore, it is preferable that the said thinning part is mutually symmetrically arranged on both surfaces of the said 1st main surface and the said 2nd main surface.

According to the invention, the fastener elements having the above-described configuration are arranged at a predetermined pitch along the tape length direction on the tape side edge portion of the fastener tape, and the size of the fastener element is large. A fastener stringer satisfying the relationship of D1 <(P−D1) is provided, where P is the thickness and D1 is the distance between the outer peripheral surfaces of the adjacent fastener elements.

In the fastener stringer according to the present invention, it is preferable that the relationship of D2> (P−D1) is satisfied, where D2 is a distance between the tape clamping surfaces of the adjacent fastener elements.

The metal fastener element according to the first embodiment of the present invention is configured as a so-called double-sided element. In particular, the body of the fastener element has an insertion space portion formed in the meshing head and a circumferential surface of the body. Between the tape clamping surface, a bridge portion that protrudes from the position of the bottom surface of the insertion space portion in the element thickness direction and connects the left and right leg portions is provided.

Furthermore, the body portion and the left and right leg portions of the fastener element have an inner peripheral edge portion arranged along the tape clamping surface and an outer edge portion arranged along the left and right element outer surfaces. Further, in the left and right outer edge portions, the thickness dimension between the first main surface and the second main surface is set to a constant size, and the inner peripheral edge portion on the first main surface side and the second At least a part of the inner peripheral edge on the main surface side is provided with a thinned portion in which the thickness dimension between the first main surface and the second main surface is reduced from the outer edge portion.

The metal fastener element according to the second embodiment of the present invention is configured as a so-called single-sided element, and the body part and the left and right leg parts of the fastener element are arranged along the tape clamping surface. Part and the outer edge part distribute | arranged along the element outer surface on either side. Further, in the left and right outer edge portions, the thickness dimension between the first main surface and the second main surface is set to a constant size, and the inner peripheral edge portion on the first main surface side and the second At least a part of the inner peripheral edge on the main surface side is provided with a thinned portion in which the thickness dimension between the first main surface and the second main surface is reduced from the outer edge portion.

If it is the fastener element which concerns on the 1st and 2nd form of this invention comprised as mentioned above, the dimension of the tape front-and-back direction of a tape clamping surface will be made small by the thinning part distribute | arranged to the inner peripheral edge part. (In other words, since the area of the tape clamping surface can be reduced), the tape contact area of the fastener element can be reduced when the fastener element is attached to the tape side edge of the fastener tape. .

Therefore, for example, when the attachment pitch of the fastener elements is set to the same size as that of the conventional slide fastener, the tape area (tape area) in the tape length direction of the fastener tape between the respective fastener elements results. Because of the expansion, the flexibility of the fastener stringer is enhanced.

On the other hand, the outer edge portions of the body portion and the left and right leg portions of the fastener element of the present invention have a certain thickness and a predetermined size, so that the fastener element is attached to the fastener tape to constitute a slide fastener When it does, in the planar view of a slide fastener, it becomes difficult to see the removal part of each fastener element by the outer edge part of a trunk | drum and a leg part on either side. For this reason, in this invention, the bad effect that the external appearance and appearance of a slide fastener are impaired by raising the softness | flexibility of a fastener stringer like the case of the said patent document 1, for example does not arise.

Furthermore, for example, when the slider of the slide fastener is slid in the closing direction, the outer surface of each fastener element that has entered the element guide path of the slider and the end surface (rear end surface) on the tape inner side of the leg portion are inside the slider. Therefore, the posture of each fastener element can be prevented from being inclined in the element guide path of the slider, and the left and right fastener elements can be smoothly meshed with each other.

In addition, the fastener element of the present invention is provided with the thinning portion provided at the inner peripheral edge portion even when the attachment pitch is reduced with respect to the fastener tape, for example, for the purpose of enhancing the design. Moreover, the contact area with respect to a fastener tape can be made small. For this reason, it is possible to appropriately secure a tape area in the tape length direction of the fastener tape between the respective fastener elements, and to suppress a decrease in flexibility and flexibility of the fastener stringer. A decrease in the slidability of the slider due to the decrease is also suppressed.

Furthermore, in the present invention, as described above, the contact area of the fastener element with respect to the fastener tape is reduced to secure the tape area between the fastener elements, so that the fastener stringer is configured by reducing the attachment pitch of the fastener elements. Even at times, it is possible to appropriately ensure the stretchability at the element attachment portion of the fastener tape, and to make it difficult for the fastener stringer to generate puckering.

Further, in the double-sided element according to the first aspect of the present invention, the bridge portion as described above is provided in the trunk portion, so that the left and right leg portions of the trunk portion are branched (the crotch portion) and the vicinity thereof. The strength of can be increased. Therefore, when the fastener element is crimped and attached to the fastener tape, even if the leg portion is plastically deformed, it is possible to make it difficult for the trunk portion to be deformed. It can be maintained stably. In addition, it is possible to effectively prevent the attachment position of the fastener element from deviating with respect to the fastener tape and the posture of the fastener element from being inclined, and the fastener element can be properly planted on the fastener tape in a correct posture at a predetermined position. it can.

In the metal fastener element according to the present invention, the thinned portion includes an inclined surface or a curved surface that gradually decreases the thickness dimension toward the tape clamping surface. Thereby, the thinning part which can improve the softness | flexibility and flexibility of a fastener stringer can be easily provided in the predetermined position of the inner peripheral part of a fastener element.

Moreover, the said thinning part may be provided with the recessed part which notched in the step shape at the tape clamping surface side. Also by this, it is possible to easily provide the thinned portion capable of enhancing the flexibility and flexibility of the fastener stringer at a predetermined position on the inner peripheral edge portion of the fastener element. Further, for example, even when the fastener element is manufactured by punching from a metal flat plate-like square member, the thinned portion can be stably provided on the fastener element.

Further, in the fastener element according to the present invention, the thinning portion is continuously arranged from the tip portion of one leg portion to the tip portion of the other leg portion through a crotch portion arranged on the trunk portion. ing. Accordingly, the flexibility and flexibility of the fastener stringer to which the fastener element of the present invention is attached can be stably secured, and the occurrence of puckering can be effectively prevented.

On the other hand, the thinning portion is a part of the inner peripheral edge portion such as a continuous region extending from the base end portion of the left and right leg portions and the crotch portion of the torso portion, and the respective regions of the distal end portions of the left and right leg portions. It may be partially arranged in the part. Thereby, in the fastener stringer to which the fastener element of the present invention is attached, the flexibility and flexibility of the fastener stringer and the sliding strength of the fastener element can be combined in a balanced manner, and the occurrence of puckering is effectively prevented. it can.

Further, in the plan view of the fastener element according to the present invention, the thinned portion is arranged with a dimension of 5% or more and 50% or less of the dimension between the tape clamping surface of the fastener element and the outer surface of the left and right legs. Has been. By setting the size of the thinned portion in such a range, the contact area of the fastener element with the fastener tape can be stably reduced, and the body portion and the leg portion can be provided even if the thinned portion is provided in the fastener element. It can prevent that the intensity | strength of falls.

In the present invention, the dimension between the tape clamping surface of the fastener element and the outer side surface of the leg is the tape clamping surface and the outer side surface of the leg when the fastener element is viewed from the upper surface side or the lower surface side. The dimension of the shortest distance connecting If the shortest distance connecting the tape clamping surface and the outer surface of the leg varies depending on the position of the leg, the shortest distance connecting the tape clamping surface and the outer surface of the leg is the shortest distance of the leg. The dimension of the shortest distance in the part.

Further, in the fastener element of the present invention, the thinned portions are arranged symmetrically on the both sides of the first main surface and the second main surface of the fastener element. Thereby, when attaching a fastener element to a fastener tape, since it is not necessary to consider the direction of the front-and-back direction of a fastener element, planting of a fastener element can be performed efficiently.

According to the present invention, the fastener elements having the above-described configuration are arranged at a predetermined pitch along the tape length direction at the tape side edge of the fastener tape, and the fastener element pitch is set. A fastener stringer satisfying the relationship of D1 <(P−D1) is provided, where P is the size and D1 is the distance between the outer peripheral surfaces of the adjacent fastener elements.

Such a fastener stringer according to the present invention can secure a wide tape area between the respective fastener elements in the fastener stringer, so that the flexibility of the fastener stringer can be enhanced. Moreover, when a slide fastener is comprised using the said fastener stringer, the slidability of a slider can be improved. Furthermore, since it is possible to make the fastener tape difficult to see between the respective fastener elements in the element row, it is possible to enhance the design of the slide fastener and to give the slide fastener a high-class feeling.

In particular, in the present invention, when the distance between the tape clamping surfaces of the adjacent fastener elements is D2, a wide tape area is secured between the fastener elements so as to satisfy the relationship D2> (P−D1). be able to. Thereby, it can suppress that the softness | flexibility and flexibility of a fastener stringer fall, and the fall of the slidability of the slider accompanying the fall of a softness | flexibility and a flexibility is also suppressed. Furthermore, the stretchability in the element attachment part of a fastener tape can be ensured appropriately, and it can be made hard to generate puckering in a fastener stringer.

It is a perspective view which shows the fastener element which concerns on Example 1 of this invention. It is a top view which shows the fastener element. FIG. 3 is a cross-sectional view taken along the line III-III shown in FIG. It is a top view which shows the left-right paired fastener stringer by which the fastener element was attached to the fastener tape. It is sectional drawing which shows the cross section in the principal part of the fastener stringer. FIG. 6 is a sectional view taken along line VI-VI shown in FIG. 5. It is sectional drawing of the direction orthogonal to the tape front and back direction in the principal part of the fastener stringer. It is a perspective view which shows the fastener element which concerns on Example 2 of this invention. It is a top view which shows the fastener element. FIG. 10 is a sectional view taken along line XX shown in FIG. 9. It is a cross-sectional view of the fastener stringer with the fastener element attached to the fastener tape. FIG. 12 is a cross-sectional view taken along line XII-XII shown in FIG. It is a top view which shows the fastener element which concerns on Example 3 of this invention. It is a perspective view which shows the fastener element which concerns on Example 4 of this invention. It is sectional drawing of the fastener element. It is a perspective view which shows the conventional fastener element.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings by way of examples. The present invention is not limited to the embodiments described below, and various modifications can be made as long as it has substantially the same configuration as the present invention and has the same effects. Is possible.

For example, in the present invention, the method for manufacturing the fastener element is not particularly limited, and can be arbitrarily selected. That is, the fastener element of the present invention includes a metal element manufactured by punching or cutting a flat wire into an element shape, a metal element manufactured by die casting, and a long wire having a Y-shaped cross section ( The metal element etc. which are manufactured by sequentially cutting the Y bar) are included.

FIG. 1 is a perspective view showing a fastener element according to the first embodiment. FIG. 2 is a plan view showing the fastener element, and FIG. 3 is a cross-sectional view taken along the line III-III shown in FIG.

In the following description of the fastener element, the front-rear direction refers to a direction parallel to the tape width direction of the fastener tape to which the fastener element is attached, and is also referred to as an element length direction. In this case, the front refers to the direction in which the meshing head is disposed with respect to the body portion of the fastener element, and the rear refers to the direction in which the leg portion is disposed relative to the body portion of the fastener element. .

Also, the left and right direction refers to a direction parallel to the tape front and back direction of the fastener tape, and is also referred to as an element width direction. Furthermore, the vertical direction refers to a direction parallel to the tape length direction of the fastener tape, and is also referred to as an element thickness direction.

The fastener element 10 of the first embodiment is made of a metal such as a copper alloy, a nickel alloy, or an aluminum alloy. The fastener element 10 includes a meshing head 11 having a meshing convex portion 14 and a fitting space portion 15, a body 12 disposed on the rear end side of the meshing head 11, and a fork from the rear end of the body 12. It has a pair of left and right leg portions 13 that branch and extend, and the meshing convex portion 14 and the fitting space on the upper surface (first main surface) side and the lower surface (second main surface) side of the meshing head 11, respectively. The unit 15 is configured as a double-sided element in which one set is arranged.

Further, the fastener element 10 is formed symmetrically with respect to the center position in the element thickness direction and symmetrically with respect to the center position in the element width direction.

In this case, the body portion 12 refers to a portion arranged from the edge position of the bottom surface 15a of the insertion space portion 15 to the position of the tape clamping surface 18 described later in the element length direction (front-rear direction). A portion disposed on the front side of the trunk portion 12 is referred to as a meshing head 11, and a portion disposed on the rear side of the trunk portion 12 is referred to as a leg portion 13. 1 and 2 show the fastener element 10 in a state before being attached to the fastener tape 2, and the left and right leg portions 13 are opened in the element width direction. When viewed from the upper surface or lower surface side, it has a substantially Y-shaped form.

The meshing head 11 is a thin plate-like head body (base) having a constant size in the vertical direction (element thickness direction) between the upper surface (first main surface) and the lower surface (second main surface). 11a, a meshing protrusion 14 projecting from the upper and lower surfaces of the head body 11a, and left and right sides extending forward from the body 12 on the upper and lower surfaces of the head body 11a. And an extending portion 11b.

The head main body 11 a of the meshing head 11 is formed with a predetermined thickness that is smaller than the body portion 12 through a step and having a smaller element thickness dimension. Further, the front end edge (front end edge) of the head body 11a is arranged in parallel to the element width direction. The left and right side edges of the head body 11a are arranged in the element length direction so that the dimension of the head body 11a in the element width direction gradually decreases toward the front edge when the fastener element 10 is viewed from the upper surface side or the lower surface side. Tilted or curved with respect to.

The upper and lower meshing protrusions 14 project in a mountain shape from the upper and lower surfaces of the head body 11a at the center in the element width direction at the front end of the head body 11a. Are spaced apart from each other by a predetermined distance. The left and right extending portions 11b have predetermined element thickness dimensions raised from the head main body 11a at positions spaced apart from each other, and from the left and right outer portions 12b of the trunk portion 12 to be described later to the left and right sides of the meshing convex portion 14. It extends forward so as to go to. In this case, a predetermined gap is provided between the meshing convex portion 14 and the left and right extending portions 11b.

The upper and lower surfaces of the left and right extending portions 11 b are arranged on the same plane as the upper and lower surfaces of the left and right outer portions 12 b of the trunk portion 12 and the left and right outer edge portions of the leg portion 13. In addition, the inner side surfaces of the left and right extending portions 11b are in the vertical direction so that the dimension in the element width direction of each extending portion 11b gradually increases as the height of the bottom surface 15a of the insertion space portion 15 approaches. It is formed in an inclined taper shape.

Further, the meshing head portion 11 is formed with a fitting space 14 surrounded by the meshing convex portion 14, the left and right extending portions 11 b, and the body portion 12 on the upper surface side and the lower surface side of the head body 11 a, respectively. Yes. Each insertion space 15 has a bottom surface 15a in which the position (height position) in the element thickness direction is set to the same position as the top surface and the bottom surface of the head body 11a.

The trunk portion 12 in the first embodiment protrudes from the bottom surface 15a of the insertion space portion 15 in the element thickness direction, and the bridge portion 12a having a larger element thickness than the head body 11a of the meshing head portion 11 is replaced with the trunk portion 12a. It has in the center part of the element width direction of the part 12, and has the outer part 12b distribute | arranged to the right-and-left both sides of the bridge part 12a.

In this case, the bridge portion 12a in the trunk portion 12 is provided with an insertion space portion 15 and a crotch portion 12c (tape sandwiching surface 18) to be described later along the element width direction so as to connect the base end portions of the left and right leg portions 13. It is arranged between. Moreover, as shown in FIG. 3, the bridge part 12a has the inclined surface which inclines downward toward the front in the insertion space part 15 side of the said bridge part 12a.

The left and right outer portions 12b of the body portion 12 have an upper surface and a lower surface that are formed in parallel and flat with each other. The upper and lower surfaces of the left and right outer portions 12b (especially the outer edge portions) are continuous with the upper and lower surfaces of the left and right extending portions 11b and the upper and lower surfaces of the outer edge portions of the left and right leg portions 13, respectively. The element thickness dimension of the left and right outer portions 12b is the same as the element thickness dimension of the left and right extending portions 11b and the element thickness dimension of the outer edge portions of the left and right leg portions 13. Is set.

Since the bridge portion 12a is disposed between the left and right outer portions 12b of the body portion 12 of the first embodiment, the strength of the body portion 12 can be effectively improved. It is possible to make it difficult to deform the body 12 during the fastening process.

Further, a thinning portion 16 that is inclined downward toward the tape clamping surface 18 is disposed at the central portion of the body portion 12 as will be described later. By forming the thinned portion 16 of the body portion 12 so as to be inclined downward in this manner, for example, compared to a case where the thinned portion is configured by a concave portion recessed in a step shape on the tape clamping surface side. The thickness of the bridge portion 12a in the element length direction (front-rear direction) can be easily secured, and the strength of the bridge portion 12a can be increased.

The left and right leg portions 13 in the first embodiment branch and extend to the left and right via the crotch portion 12c at the rear end of the trunk portion 12. In addition, a hook-shaped bent portion 13a bent in a direction (inner side) approaching each other is disposed at the front end portion (rear end portion) of the left and right leg portions 13.

In this case, the upper surface and the lower surface at the outer edge of each leg 13 are formed as flat surfaces parallel to each other, and the dimension in the element thickness direction between the upper and lower surfaces at the outer edge of this leg 13 is In consideration of the appearance of the slide fastener, the contact with the slider when the slider slides, etc., the predetermined size is set. Further, as described above, the dimension in the element thickness direction at the outer edge portion of the trunk portion 12 is also set to the same predetermined constant size as the dimension in the element thickness direction at the outer edge portion of the leg portion 13. .

In the fastener element 10 of the first embodiment, the inner peripheral surfaces of the trunk portion 12 and the left and right leg portions 13 are arranged in parallel to the element thickness direction. This inner peripheral surface includes a front end surface facing the inner side (center position side in the element width direction) of the bent portion 13a in the left and right leg portions 13, and one leg portion 13 (left leg portion 13). It has a continuous surface from the distal end surface of the bent portion 13a to the distal end surface of the bent portion 13a of the other leg portion 13 (right leg portion 13) through the trunk portion 12.

Further, the inner peripheral surface of the fastener element 10 is in close contact with the fastener tape 2 when the fastener element 10 is attached to the fastener tape 2 so as to sandwich the tape side edge portion of the fastener tape 2 as will be described later ( It becomes the tape clamping surface 18 to be pressed.

In this case, the upper and lower surfaces of the body 12 and the left and right legs 13 of the fastener element 10 that are continuously arranged along the tape clamping surface 18 are defined as inner peripheral edges. Further, the upper and lower side portions of the body 12 and the left and right legs 13 of the fastener element 10 that are continuously arranged along the peripheral surface (that is, the outer peripheral surface) that is not the tape clamping surface 18 are the outer peripheral edge portions. In the outer peripheral edge portion, the outer edge portion disposed along the outer surface of the body portion 12 and the left and right leg portions 13 and the rear end surface of the leg portion 13 facing the inner side of the tape are disposed. And a rear edge. Further, when the fastener element 10 is attached to the fastener tape 2, the outer surface of the body portion 12 and the left and right leg portions 13 are separated from the fastener tape 2 and are parallel to the tape surface and the tape back surface (substantially parallel). Including).

Further, in the first embodiment, the inner peripheral edge portions of the trunk portion 12 and the left and right leg portions 13 are provided with a thinning portion 16 that reduces the dimension between the upper surface and the lower surface (that is, the element thickness dimension). In addition, along the tape clamping surface (inner peripheral surface) 18 of the left and right legs 13, they are symmetrically arranged on the upper surface side and the lower surface side of the element. By providing the thinning portion 16, the element thickness dimension of the region where the thinning portion 16 is disposed on the inner peripheral edge portion is larger than the element thickness dimension of the outer edge portion of the left and right leg portions 13. It is also small. That is, the thickness of the tape narrowing surface 18 in the region where the thinned portion 16 is disposed is a thin portion thinner than the element thickness dimension of the outer edge portions of the left and right legs 13. In the present invention, the thinned portion 16 can be provided asymmetrically on the front and back sides of the element upper surface side and the element lower surface side according to the purpose of use of the slide fastener.

Particularly in the case of the first embodiment, the thinned portion 16 is configured by a downwardly inclined surface that gradually decreases the element thickness dimension toward the tape clamping surface 18. The thinned portion 16 may be formed of a curved surface that gradually decreases the element thickness dimension toward the tape clamping surface 18.

Further, when the fastener element 10 is viewed from the upper surface side or the lower surface side, the dimension in the downward inclination direction of the thinned portion 16 (that is, the dimension perpendicular to the tape clamping surface 18 of the thinned portion 16) is Set within the range of 5% to 50%, preferably 7% to 30% of the minimum distance between the tape clamping surface (inner peripheral surface) 18 and the outer surfaces of the left and right legs 13. Has been.

The dimension of the thinning portion 16 is set to 5% or more of the minimum distance between the tape clamping surface 18 and the outer surface, so that the fastener element 10 is attached to the fastener tape 2 as described later. In this case, the fastener tape can be substantially pressed only by the tape narrowing surface 18, and the contact area of the fastener element 10 to the fastener tape 2 can be reduced.

Moreover, when the said dimension of the thickness removal part 16 is set to 50% or less of the dimension of the minimum distance between the tape clamping surface 18 and an outer surface, the trunk | drum 12 and the leg part 13 of the fastener element 10 are set. Even if the thinning portion 16 is provided on the body, it is possible to prevent the strength of the body portion 12 and the leg portion 13 from greatly decreasing. Moreover, when the fastener element 10 is attached to the fastener tape 2 to constitute the fastener stringer 1, the thinned portion 16 of the fastener element 10 can be made less visible from the outside.

Further, in the first embodiment, the thinning portion 16 removes the body portion 12 from the bent portion 13a of one (left side) leg portion 13 except for a part of the tip portion of the bent portion 13a in the left and right leg portions 13. And the bent portion 13a of the other (right side) leg portion 13 is continuously arranged along the tape clamping surface 18. In other words, the thin-walled portion excluding a part of the distal end portion of the bent portion 13a in the left and right leg portions 13, from the bent portion 13a of one (left side) leg portion 13 through the trunk portion 12, to the other ( The bent portion 13a of the leg portion 13 on the right side is continuously arranged along the tape clamping surface 18 (that is, continuously arranged on the inner peripheral edge portion excluding a part of the tip portion of the bent portion 13a). ing). In this case, in the partial range along the tape clamping surface 18 at the distal end portion of the bent portion 13a, the outer portion 12b of the body portion 12 and the corner portion on the outer peripheral side at the distal end portion of the bent portion 13a A non-thickening portion 17 having the same element thickness as the outer edge portions of the left and right legs 13 is disposed.

When manufacturing the fastener element 10 of Example 1 having such a configuration, first, a pair of upper and lower molds are used for a rectangular wire made of a metal such as a copper alloy, a nickel alloy, or an aluminum alloy. The mesh head 11, the body 12, and the thinned portion 16 are formed at a predetermined pitch by performing press working to partially plastically deform the flat wire. Then, the edge cutting process which cuts out the substantially triangular-shaped unnecessary part from the right-and-left side edge part of the said rectangular wire is performed.

Next, punching is performed on the rectangular wire that has been subjected to edge cutting, along the outer peripheral shape of the fastener element 10 using a cutting punch and a cutting die, and then the obtained element-shaped metal piece By performing a polishing process, a painting process, etc., the fastener element 10 of the present Example 1 shown in FIG. 1 is obtained.

The fastener element 10 of Example 1 obtained in this way is manufactured in a state in which a pair of left and right legs 13 are opened to the left and right from the front end toward the rear end on the body 12 side. For this reason, by inserting the tape side edges of the fastener tape 2 between the left and right legs 13, and further crimping the left and right legs 13 in the inner direction approaching each other to plastically deform the fastener element 10, The fastener element 10 is attached (planted) to the fastener tape 2.

In this case, the fastener tape 2 of the first embodiment is provided with the core string portion 2a along the inner edge of the tape, and the fastener tape 2 is pulled in the tape length direction to give tension to the fastener tape 2. In this state, the fastener element 10 is attached to the fastener tape 2 so as to be held across the core string portion 2a of the fastener tape 2.

In particular, in the fastener element 10 of the first embodiment, the strength of the trunk portion 12 is increased by providing the trunk portion 12 with the bridge portion 12a having a larger element thickness than the head body 11a of the meshing head portion 11. It has been. For this reason, even when the left and right leg portions 13 are crimped and plastically deformed when the fastener element 10 is attached, the body portion 12 can be hardly deformed.

Thereby, the form of the insertion space portion 15 arranged in the meshing head 11 can be stably maintained. At the same time, when the fastener element 10 is attached to the fastener tape 2 by caulking, the attachment position of the fastener element 10 is shifted relative to the fastener tape 2 and the posture of the fastener element 10 is effectively inclined. This can prevent the fastener element 10 from being properly planted at a predetermined position in a correct posture.

Furthermore, since the bridge portion 12 a is arranged on the fastener element 10 of the first embodiment, when the fastener element 10 is attached to the fastener tape 2, the core string portion 2 a of the fastener tape 2 becomes the bridge portion of the fastener element 10. Since it is pressed down by 12a, it can suppress that the core string part 2a bulges so that it may rise to the insertion space part 15 side of the fastener element 10. FIG.

Thus, the core string portion 2a of the fastener tape 2 is prevented from entering the insertion space portion 15 of each fastener element 10, and the space portion of the insertion space portion 15 can be secured stably. Therefore, when the slide fastener is configured and the left and right fastener elements 10 are meshed, the meshing convex portions 14 of the mating counterpart fastener elements 10 are stably fitted into the fitting space portions 15 of the respective fastener elements 10, The fastener elements 10 can be smoothly meshed in order.

Further, when the core string portion 2a of the fastener tape 2 is pressed by the bridge portion 12a of the fastener element 10, when the left and right fastener elements 10 are engaged or separated, the fastener of the mating partner is engaged with the core string portion 2a of the fastener tape 2. It becomes difficult for the element 10 to contact directly. For this reason, even if the opening and closing operation of the slide fastener by the sliding of the slider is repeatedly performed, it is possible to make it difficult to generate fluff in the core string portion 2a of the fastener tape 2, and thereby, for example, the fluff of the core string portion 2a It is possible to prevent the occurrence of problems such as poor engagement of the fastener element 10 due to the occurrence.

And in this Example 1, the fastener stringer 1 as shown in FIG. 4 is obtained by attaching the several fastener element 10 to the tape side edge part of the fastener tape 2 in a predetermined attachment pitch one by one. Further, the obtained fastener stringers 1 are combined in pairs, and a slider (not shown) is slidably attached along the element rows of the left and right fastener stringers 1 to constitute a slide fastener.

In this case, in the first embodiment, the fastener stringer 1 is configured with the attachment pitch of the fastener element 10 in the tape length direction being narrower than that of a conventional general fastener stringer 1, for example.

Specifically, as shown in FIGS. 4 and 7, the size of the mounting pitch of the fastener elements 10 is “P”, and the interval between the outer peripheral surfaces of the fastener elements 10 adjacent to each other in the tape length direction is “ When “D1” is set, the fastener stringer 1 is configured to satisfy the relationship “D1 <(P−D1)”. Here, the mounting pitch of the fastener elements 10 refers to an interval between the center positions in the tape length direction (element thickness direction) in the fastener elements 10 adjacent to each other in the tape length direction.

As described above, the relationship of “D1 <(P−D1)” is satisfied, that is, the size of D1 is set at the outer side portion 12b of the body portion 12 and the outer edge portion of the leg portion 13 of each fastener element 10. By configuring the fastener stringer 1 by narrowing the mounting pitch of the fastener elements 10 so as to be smaller than the element thickness dimension, the fastener elements 10 are finely arranged in the tape length direction, and each fastener element 10 in the element row is arranged. The fastener tape 2 exposed in between can be made difficult to see. Thereby, the appearance of the fastener stringer 1 is improved, and it is possible to enhance the design of the slide fastener or to give the slide fastener a high-class feeling.

Moreover, in the fastener stringer 1 of the first embodiment, the thinning portions 16 are provided on the upper surface side and the lower surface side of each fastener element 10, and therefore the thinning portions 16 of the fastener elements 10 adjacent to each other in the tape length direction. When the distance between the tape clamping surfaces 18 in the portion (thin wall portion) provided with “D2” is satisfied, the relationship “D1 <(P−D1)” is satisfied, and at the same time, “D2> (P −D1) ”, in other words, the size of D2 can be made larger than the element thickness dimension at the outer edge of the leg 13 of each fastener element 10.

That is, in the fastener stringer 1 of the first embodiment, even if the fastener element 10 is attached to the fastener tape 2 with a narrow attachment pitch, as shown in FIGS. Since 16 becomes a tape non-contact part which does not contact the fastener tape 2, the contact area (especially contact area with respect to the core string part 2a of the fastener tape 2) of the fastener element 10 can be made small.

Therefore, in the first embodiment, the tape region in the tape length direction of the tape region (tape region disposed between the tape clamping surfaces 18 of each fastener element 10) that is not gripped by the fastener element 10 between the respective fastener elements 10. The dimension (ie, “D2”) may be larger than the apparent spacing between fastener elements 10 (ie, “D1”).

Actually, in the case of the fastener stringer 1 of the first embodiment, the size P of the mounting pitch of the fastener elements 10 is set to 2.11 mm or more and 2.20 mm or less, and the distance D1 between the outer peripheral surfaces of the adjacent fastener elements 10 is set. Is set to 0.96 mm or more and 1.00 mm or less. In this case, the element thickness dimension (P-D1) at the outer edge of the leg portion 13 of each fastener element 10 is set to 1.11 mm or more and 1.24 mm or less, preferably 1.15 mm or more and 1.20 mm or less. ing. Moreover, the space | interval D2 between the tape clamping surfaces 18 in the part in which the thickness removal part 16 of the adjacent fastener element 10 is provided is set to 1.36 mm or more and 1.40 mm or less. When the above dimensions are expressed relatively, when P is 100%, D1 is set in the range of 40% to less than 50%, and D2 is set in the range of 55% to 65%.

Thereby, since the tape area | region of the fastener tape 2 is ensured appropriately between each fastener element 10, even if the attachment pitch of the fastener element 10 is narrowed, the flexibility and bendability of the fastener stringer 1 are reduced. Can be suppressed. At the same time, the lowering of the sliding property of the slider accompanying the lowering of the flexibility and flexibility of the fastener stringer 1 can be suppressed.

On the other hand, in the past, when the fastener stringer is generally configured with the fastener element mounting pitch narrowed, as described above, when the fastener tape tension is released after the fastener element mounting operation is completed, the fastener tape element mounting is performed. The problem of puckering may occur due to the difference in shrinkage between the tape part and the tape main part.

On the other hand, in the fastener stringer 1 of the first embodiment, since the tape region between the fastener elements 10 is appropriately secured as described above, the stretchability in the element mounting portion of the fastener tape 2 is appropriately secured, The difference in shrinkage between the element mounting portion and the tape main portion can be reduced. As a result, even if the fastener stringer 1 is manufactured by narrowing the mounting pitch of the fastener elements 10, it is possible to make it difficult for puckering to occur in the fastener stringer 1.

Furthermore, in the fastener stringer 1 of the first embodiment, the outer edge portion 12b of the trunk portion 12 and the outer edge portions of the left and right leg portions 13 are predetermined even though the thinning portions 16 are provided in each fastener element 10. Therefore, the thinned portion 16 of each fastener element 10 can be hardly seen from the outside. For this reason, in the first embodiment, there is no problem that the appearance of the slide fastener is deteriorated or the appearance is not deteriorated by increasing the flexibility of the fastener stringer 1.

In addition, since the outer edge portion of each fastener element 10 has a predetermined thickness dimension, each fastener that has entered the element guide path of the slider when the slider of the slide fastener is slid in the closing direction. The element 10 can be appropriately brought into contact with the element guide surface inside the slider. For this reason, the posture of each fastener element 10 can be prevented from being inclined in the element guide path of the slider, and the left and right fastener elements 10 can be smoothly meshed.

In the first embodiment, the fastener element is set to the same size as that of a conventional general fastener stringer, for example, without reducing the attachment pitch of the fastener element 10 as described above. It is of course possible to construct a fastener stringer by attaching 10 to the fastener tape 2.

In this case, the fastener stringer to which the fastener element 10 of Example 1 is attached has a larger tape area of the fastener tape 2 between the fastener elements 10 than in the case of a conventional general fastener stringer. Flexibility and flexibility are improved.

FIG. 8 is a perspective view showing the fastener element according to the second embodiment. FIG. 9 is a plan view showing the fastener element, and FIG. 10 is a cross-sectional view taken along the line XX shown in FIG.

The fastener element 20 of the second embodiment is made of metal as in the first embodiment, and includes a meshing head 21 having a meshing convex portion 24 and a fitting space portion 25, and a meshing head 21. It has the trunk | drum 22 distribute | arranged to the rear end side, and the left-right paired leg part 23 branched and forked from the rear end of the trunk | drum 22.

The fastener element 20 of the second embodiment is also a double-sided surface in which a pair of meshing convex portions 24 and fitting space portions 25 are arranged on the upper surface side and the lower surface side of the meshing head 21 as in the first embodiment. It is configured as an element, is formed symmetrically with respect to the center position in the element thickness direction, and symmetrically formed with respect to the center position in the element width direction.

The meshing head 21 includes a thin flat plate-shaped head main body 21a whose element thickness dimension is smaller than that of the trunk, a meshing convex part 24 projecting in a mountain shape on the upper and lower surfaces of the head main body 21a, The main body 21a has left and right extending portions 21b extending forward from the body portion 22 on the upper surface side and the lower surface side. Further, the left and right extending portions 21b are disposed from the trunk portion 22 toward the front at a position spaced apart from each other, having a larger element thickness than the head main body 21a.

The upper and lower surfaces of the left and right extending portions 21 b are arranged on the same plane as the upper and lower surfaces of the left and right outer portions 22 b of the trunk portion 22 and the left and right outer edge portions of the leg portion 23. In addition, the inner side surfaces of the left and right extending portions 21b are arranged with respect to the vertical direction so that the dimension in the element width direction of each extending portion 21b gradually increases as it approaches the height position of the bottom surface 25a of the insertion space portion 25. It is formed in an inclined taper shape.

Further, the meshing head 21 is formed with a fitting space 24 surrounded by the meshing convex part 24, the left and right extending parts 21b, and the body part 22 on the upper surface side and the lower surface side of the head body 21a, respectively. Yes. Each insertion space 25 has a bottom surface 25a in which the position in the element thickness direction is set to the same position as the top surface and the bottom surface of the head body 21a.

The trunk portion 22 according to the second embodiment protrudes from the bottom surface 25a of the insertion space portion 25 in the element thickness direction, and the bridge portion has a larger element thickness dimension than the head body 21a of the meshing head portion 21 through a step. 22a is provided at the center of the body portion 22 in the element width direction, and outer portions 22b are provided on both the left and right sides of the bridge portion 22a.

In this case, the bridge portion 22a in the body portion 22 is arranged along the element width direction so as to connect the base end portions of the left and right leg portions 23. Further, the upper and lower surfaces of the bridge portion 22a of the trunk portion 22 and the upper and lower surfaces of the left and right outer portions 22b of the trunk portion 22 constitute a flat and identical plane.

Further, in this case, the element thickness dimensions of the bridge portion 22a and the left and right outer portions 22b of the trunk portion 22 are the element thickness sizes of the left and right extending portions 21b of the meshing head 21, and the outer sides of the left and right leg portions 23. It is set to the same predetermined size as the element thickness dimension at the edge. Moreover, the bridge part 22a has the taper-shaped inclined surface which inclines down toward the front in the insertion space part 25 side.

In the second embodiment, the left and right leg portions 23 branch out to the left and right and extend through a crotch portion 22c arranged at the rear end of the trunk portion 22. In addition, a recess 23b into which a part of the core string portion 2a of the fastener tape 2 is inserted is provided in the inner peripheral edge of the left and right legs 23 along the element thickness direction. At the front end (rear end) of the portion 23, a hook-like bent portion 23a bent in a direction approaching (inner side) is disposed.

The upper and lower surfaces of the outer edge portions of the left and right leg portions 23 are formed as flat surfaces parallel to each other. The dimension in the element thickness direction between the upper and lower surfaces of the outer edge portions of the leg portions 23 is a slide fastener. Is set to a predetermined size in consideration of the appearance of the slider, contact with the slider when the slider slides, and the like.

In the fastener element 20 of the second embodiment, the inner peripheral surfaces of the trunk portion 22 and the left and right leg portions 23 are arranged in parallel to the element thickness direction. The inner peripheral surface includes a front end surface facing the inner side (center side in the element width direction) of the bent portion 23a in the left and right leg portions 23, and the bent portion 23a of one (left side) leg portion 23. From the front end surface to the front end surface of the bent portion 23a of the other (right side) leg portion 23, the body portion 22 is continuously arranged. This inner peripheral surface becomes a tape clamping surface 28 that is in close contact with the fastener tape 2 when the fastener element 20 is attached to the fastener tape 2.

Further, in the second embodiment, at the inner peripheral edge portions of the left and right leg portions 23, a thinning portion 26 that reduces the dimension between the upper surface and the lower surface (that is, the element thickness dimension) is provided along the tape clamping surface 28. The element upper surface side and the element lower surface side are arranged symmetrically. By providing this thinning portion 26, the element thickness dimension of the region of the inner peripheral edge where the thinning portion 26 is disposed is larger than the element thickness dimension of the outer edge portion of the left and right leg portions 23. Becomes smaller.

That is, the thickness of the tape narrowing surface 28 in the region where the thinned portion 26 is disposed is a thin portion thinner than the element thickness dimension of the outer edge portions of the left and right leg portions 23. In other words, the thickness of the tape narrowing surface 28 in the region where the thinning portion 26 is disposed is thinner than the thickness of the tape narrowing surface 28 in the region configured as a non-thinning portion 27 described later. It becomes a thin part.

Particularly, the thinning portion 26 of the second embodiment is partially provided in the inner peripheral edge portion where the body portion 22 and the left and right leg portions 23 are continuous. In other words, the thinning part 26 of the second embodiment is arranged separately on the left and right in the inner peripheral edge of the leg part 23 region. On the other hand, the base end portions of the left and right leg portions 23 and the inner peripheral edge portion of the rear end portion (the crotch portion 22c) of the body portion 22 have the same element thickness as the outer edge portions of the left and right leg portions 23. The unit 27 is configured.

In this second embodiment, the thinning portion 26 is formed by a concave portion that is recessed as if stepped on the tape clamping surface 28 side with respect to the upper and lower surfaces of the left and right leg portions 23 except for the thinning portion 26. It is configured. Further, when the fastener element 20 is viewed from the upper surface side or the lower surface side, the dimension of the area where the thinned portion 26 is formed from the tape clamping surface 28 is between the tape clamping surface 28 and the outer surface of the leg portion 23. Is set in a range of 5% to 50%, preferably in a range of 7% to 30%.

The fastener element 20 of this second embodiment is sequentially punched, punched, and punched into a flat metal wire in the same manner as in the first embodiment, and then punched from the flat wire. It is manufactured by performing a polishing step, a painting step, etc. on the element-shaped metal piece.

As shown in FIG. 8, the fastener element 20 of the second embodiment manufactured with the pair of leg portions 23 opened is provided with left and right tape side edges of the fastener tape 2 to which tension is applied. In addition, the left and right leg portions 23 are crimped inwardly toward each other and the fastener element 20 is plastically deformed so as to be held across the core string portion 2a of the fastener tape 2. The fastener tape 2 is attached.

At this time, in the fastener element 20 of the second embodiment, the strength of the body portion 22 is enhanced by the bridge portion 22a disposed between the insertion space portion 25 and the tape clamping surface 28, so Even if the part 23 is crimped, the body part 22 can be made difficult to deform.

A plurality of fastener elements 20 according to the second embodiment are sequentially attached to the tape side edge of the fastener tape 2 at a predetermined attachment pitch, whereby a fastener stringer is manufactured.

Particularly, in Example 2, when the size of the mounting pitch of the fastener elements 20 is “P” and the interval between the outer peripheral surfaces of the fastener elements 20 adjacent to each other in the tape length direction is “D1”, “D1” <In the case of the above-described first embodiment, the design of the slide fastener is enhanced by manufacturing the fastener stringer by narrowing the mounting pitch of the fastener elements 20 so as to satisfy the relationship of <(P-D1) ". Or it becomes possible to give a high-class feeling to a slide fastener.

Further, in this case, since the thinning portions 26 are provided on the upper surface side and the lower surface side of each fastener element 20, between the tape clamping surfaces 28 in the portion where the thinning portion 26 of the adjacent fastener element 20 is provided. When the distance of “D2” is set to “D2”, the size of D2 is set so that the relationship of “D2> (P−D1)” is satisfied, and the outer portion 22b of the body portion 22 of each fastener element 20 and the left and right leg portions. At the same time, the contact area of each fastener element 20 with respect to the fastener tape 2 can be reduced.

Thereby, even if the attachment pitch of the fastener element 20 is narrowed as described above, it is possible to suppress a decrease in flexibility and flexibility of the fastener stringer, and a slider accompanying a decrease in flexibility and flexibility of the fastener stringer. The deterioration of slidability is also suppressed. Furthermore, even if a fastener stringer is manufactured as described above, it is possible to make it difficult for puckering to occur.

Furthermore, in the fastener element 20 of the second embodiment, as described above, the thinned portions 26 are arranged on the inner peripheral edge portions of the recessed portions 23b and the bent portions 23a in the respective leg portions 23, and the left and right leg portions 23 are arranged. The base end portion and the rear end portion (crotch portion 22 c) of the body portion 22 are configured as a non-thickening portion 27. Therefore, as in the first embodiment, the thinning portion 16 is continuously arranged from the bent portion 13a of one leg portion 13 to the bent portion 13a of the other leg portion 13 through the trunk portion 12. Compared to the element 10, in the fastener element 20 of the second embodiment, the formation range of the thinned portion 26 along the tape clamping surface 28 is limited.

Accordingly, when the fastener element 20 of the second embodiment is attached to the fastener tape 2, the formation range of the thinned portion 26 is limited. Therefore, each fastener element 20 is compared with the fastener element 10 of the first embodiment. The contact area with respect to the fastener tape 2 increases, and the attachment strength of the fastener element 20 can be increased.

As a result, the fastener stringer of the second embodiment not only has the flexibility and the bendability appropriately secured as described above, but the attachment position with respect to the fastener tape 2 is difficult to slide in the tape length direction, and the fastener stringer Since the sliding strength of the element 20 can be improved, it is possible to combine the flexibility and flexibility of the fastener stringer with the sliding strength of the fastener element 20 in a well-balanced manner.

In addition, as above-mentioned, the thinning part 26 in the present Example 2 is comprised by the recessed part dented like the step shape notched to the tape clamping surface 28 side, but in this invention, the thinning part The form of 26 is not particularly limited, and for example, as in the case of Example 1 described above, it may be configured by an inclined surface that is inclined downward toward the tape clamping surface.

FIG. 13 is a plan view showing the fastener element according to the third embodiment.
In the fastener element 30 according to the third embodiment, the formation range along the tape clamping surface 18 of the thinned portion 36 provided on the trunk portion 12 and the left and right leg portions 13 is the same as that of the fastener element 10 according to the first embodiment. It is different, and the configuration other than the formation range of the thinned portion 36 is the same as that of the fastener element 10 of the first embodiment.

Therefore, in the third embodiment, the members and parts having substantially the same configuration and function as the fastener element 10 according to the first embodiment are represented by the same reference numerals and names as those of the first embodiment. Detailed description thereof will be omitted.

The fastener element 30 of the third embodiment includes a meshing head 11 provided with a meshing convex portion 14 and a fitting space portion 15, a trunk portion 12 disposed on the rear end side of the meshing head 11, and a rear portion of the trunk portion 12. It has a pair of left and right legs 13 branched and extended from the end, and is configured as a double-sided element having a symmetrical shape with respect to the center position in the front-back direction and the left-right direction.

The meshing head 11 includes a flat head body 11a having a certain element thickness, a meshing protrusion 14 projecting from the upper and lower surfaces of the head body 11a, the upper surface side of the head body 11a, On the lower surface side, left and right extending portions 11b extending forward from the body portion 12 are provided. Further, on the upper surface side and the lower surface side of the meshing head 11, a fitting space portion 15 having a bottom surface 15 a is formed surrounded by the meshing convex portion 14, the left and right extending portions 11 b, and the body portion 12. Yes.

The trunk portion 12 has a bridge portion 12a disposed at a central portion in the element width direction and outer portions 12b disposed on both the left and right sides of the bridge portion 12a. A hook-shaped bent portion 13a bent in a direction (inner side) approaching each other is disposed at the distal end portions of the left and right leg portions 13.

In the fastener element 30 of the third embodiment, the element thickness dimension is set to be larger than that of the outer edge portion of the leg portion 13 in the inner peripheral edge portion in the trunk portion 12 and the inner peripheral edge portion in the base end portion of the left and right leg portions 13. The thinning portions 36 to be reduced are arranged on the element upper surface side and the element lower surface side along the tape clamping surface 18. That is, also in the third embodiment, as in the case of the above-described second embodiment, the thinning portion 36 is partially provided at the inner peripheral edge portion where the body portion 12 and the left and right leg portions 13 are continuous.

On the other hand, the inner peripheral edge portion of the bent portion 13 a in the left and right leg portions 13 and the inner peripheral edge portion of the portion (intermediate portion) between the bent portion 13 a and the base end portion are the same elements as the outer edge portion of the leg portion 13. It is comprised as the non-thickening part 37 which has a thickness dimension. That is, the thickness of the tape narrowing surface 18 in the region where the thinning portion 36 is disposed is thinner than the thickness of the tape narrowing surface in the region of the non-thinning portion 37 where the thinning portion 36 is not disposed. Part.

The thinning portion 36 of the third embodiment is configured by a downwardly inclined surface that gradually decreases the element thickness dimension toward the tape clamping surface 18. Further, when the fastener element 30 is viewed from the upper surface side or the lower surface side, the dimension of the area where the thinned portion 36 is formed from the tape clamping surface 18 is between the tape clamping surface 18 and the outer surface of the leg portion 13. Is set in a range of 5% to 50%, preferably in a range of 7% to 30%. It should be noted that the thinning portion 36 of the third embodiment is not inclined on the bottom surface, but on the tape clamping surface 18 side with respect to the upper and lower surfaces of the left and right leg portions 13 as in the second embodiment described above. You may be comprised by the recessed part dented like the step shape notched.

In such a fastener element 30 of the third embodiment, the tape side edge portion of the fastener tape 2 to which tension is applied is inserted between the left and right leg portions 13, and the left and right leg portions 13 are further brought closer to each other. The fastener element 30 is plastically deformed by caulking in the direction, so that the fastener element 2 is attached to the fastener tape 2 so as to be held across the core string portion 2a of the fastener tape 2.

At this time, in the fastener element 30 of the third embodiment, the strength of the body portion 12 is enhanced by the bridge portion 12a disposed between the bottom surface 15a of the insertion space portion 15 and the tape clamping surface 18, so Even if the left and right leg portions 13 are crimped, the body portion 12 can be made difficult to deform.

And the fastener stringer is manufactured by sequentially attaching the plurality of fastener elements 30 of the third embodiment to the tape side edge portion of the fastener tape 2 at a predetermined attachment pitch.

In this third embodiment, as in the first and second embodiments, the fastener stringer is manufactured by narrowing the mounting pitch of the fastener elements 30 so as to satisfy the relationship of “D1 <(P−D1)”. By doing so, it becomes possible to improve the design property of a slide fastener, or to give a high-class feeling to a slide fastener.

Further, in this case, the thinning portions 36 are provided on the upper surface side and the lower surface side of each fastener element 30, so that the flexibility and flexibility of the fastener stringer are reduced even when the mounting pitch of the fastener elements 30 is narrowed. This can also be suppressed, and a decrease in the sliding property of the slider accompanying a decrease in the flexibility and flexibility of the fastener stringer can also be suppressed. Furthermore, even if a fastener stringer is manufactured as described above, it is possible to make it difficult for puckering to occur.

Furthermore, in the fastener element 30 of the third embodiment, as described above, the thinned portion 36 is disposed on the inner peripheral edge portion of a limited area of the fastener element 30 and the other inner peripheral edge portions are not. Since it is configured as the thinning portion 37, the contact area of each fastener element 30 with respect to the fastener tape 2 is increased as compared with the fastener element 10 of the first embodiment, and the attachment strength of the fastener element 30 is increased. Can do. Therefore, the fastener stringer of the third embodiment can combine the flexibility and flexibility of the fastener stringer with the sliding strength of the fastener element 30 in a well-balanced manner.

FIG. 14 is a perspective view showing a fastener element according to the fourth embodiment. FIG. 15 is a cross-sectional view of the fastener element. 14 and 15 show the fastener element in a state of being attached to the fastener tape (that is, a state where the left and right leg portions are pressed inward and plastically deformed).

The fastener element 40 of the fourth embodiment is made of a metal such as a copper alloy, a nickel alloy, or an aluminum alloy. Further, the fastener element 40 includes a meshing head 41 having a meshing convex portion 44 and a meshing concave portion 45, a body portion 42 disposed on the rear end side of the meshing head 41, and a fork from the rear end of the body portion 42. It has a pair of left and right legs 43 that branch and extend.

The fastener element 40 is configured as a single-sided element in which a meshing convex portion 44 and a meshing concave portion 45 are arranged on opposite sides of the meshing head 41, and is symmetrical with respect to the center position in the element width direction. Is formed.

The meshing head 41 of the fourth embodiment includes a head main body 41a having a constant element thickness dimension between the upper surface and the lower surface, and a meshing protrusion protruding in a mountain shape on the lower surface side of the head main body 41a. Part 44 and a meshing recess 45 recessed on the upper surface side of the head body 41a. Further, the meshing convex portion 44 and the meshing concave portion 45 are arranged so that their positions correspond to each other.

The body 42 is arranged from the end edge position of the meshing recess 45 to the position of the tape clamping surface 48 in the element length direction (front-rear direction). The upper surface of the trunk portion 42 is disposed at a position raised from the bottom surface 45a of the meshing recess 45 in the element thickness direction, and forms the same plane as the upper surface of the head body 41a.

The left and right leg portions 43 extend rearward from the body portion 42, and the distal end portions (rear end portions) of the left and right leg portions 43 are bent in a hook-like bent portion 43a that is bent in a direction approaching each other (inner side). Is arranged. The left and right leg portions 43 (excluding the thinning portion 46 to be described later) have a flat upper surface and a lower surface that are parallel to each other, and the element thickness dimension between the upper surface and the lower surface of the leg portion 43 is the meshing head. The element thickness dimension between the upper surface and the lower surface of the head body 41 a of the portion 41 and the element thickness dimension between the upper surface and the lower surface of the body portion 42 are set to the same size.

Further, in the fastener element 40 of the fourth embodiment, the inner peripheral surfaces of the trunk portion 42 and the left and right leg portions 43 are arranged in parallel to the element thickness direction. The inner peripheral surface becomes a tape clamping surface 48 that is in close contact with the fastener tape 2 when the fastener element 40 is attached to the fastener tape 2.

Further, in the fourth embodiment, on the inner peripheral edge portions of the left and right leg portions 43, a thinning portion 46 that makes the element thickness dimension smaller than the outer edge portion of the leg portion 43 is provided along the tape clamping surface 48. The element upper surface side and the element lower surface side are arranged symmetrically. In particular, the thinning portion 46 of the fourth embodiment is continuously arranged from the distal end of the bent portion 43 a of each leg portion 43 to the base end portion side of the leg portion 43.

On the other hand, the torso side end portions of the left and right leg portions 43 and the rear end portion (crotch portion 42a) of the torso portion 42 have the same element thickness as the outer edge portions of the left and right leg portions 43. 47. That is, the thickness of the tape narrowing surface 48 in the region where the thinning portion 46 is disposed is thinner than the thickness of the tape narrowing surface in the region of the non-thinning portion 47 where the thinning portion 46 is not disposed. It becomes a thin part.

The thinning portion 46 in the present Example 4 is constituted by a concave portion that is recessed as if stepped in the tape clamping surface 48 side. Further, when the fastener element 40 is viewed from the upper surface side or the lower surface side, the dimension of the area where the thinned portion 46 is formed from the tape clamping surface 48 is between the tape clamping surface 48 and the outer surface of the leg portion 43. Is set in a range of 5% to 50% of the minimum distance dimension.

Such a fastener element 40 of the fourth embodiment is obtained by slicing a metal wire having a substantially Y-shaped section called a Y bar with a predetermined thickness, and pressing the element material obtained by slicing the element material. The meshing convex portion 44, the meshing concave portion 45, and the thinning portion 46 are formed to produce the pair of left and right leg portions 43 in an open state.

Alternatively, the fastener element 40 according to the fourth embodiment is formed by pressing a metal rectangular wire material to form the meshing convex portion 44, the meshing concave portion 45, and the thinning portion 46 at a predetermined pitch. Manufacture is also possible by punching out the portion of the applied flat wire along the outer peripheral shape of the fastener element 40.

And the fastener element 40 of the present Example 4 manufactured with the pair of left and right leg portions 43 opened, the tape side edge portion of the fastener tape 2 to which tension is applied is inserted between the left and right leg portions 43. Further, the fastener element 40 is plastically deformed by crimping the left and right leg portions 43 in the inner direction approaching each other, so that the fastener tape 2 is attached to the fastener tape 2 so as to be held across the core string portion 2a. Is done.

At this time, in the fastener element 40 of the fourth embodiment, the trunk portion 42 is formed thick so as to have the same element thickness dimension as the outer peripheral edge portion of the head main body 41a and the leg portion 43. Since the strength of 42 is increased, it is possible to make it difficult to deform the body portion 42 even if the left and right leg portions 43 are crimped.

Then, a plurality of fastener elements 40 of the fourth embodiment are sequentially attached to the tape side edge portion of the fastener tape 2 at a predetermined attachment pitch, whereby a fastener stringer is manufactured.

Since the fastener stringer manufactured in this way has the thinned portions 46 formed on the upper and lower sides of the inner peripheral edge of the left and right leg portions 43 of each fastener element 40, the fastener tape 2 of each fastener element 40 is provided. The contact area with respect to can be reduced. Thereby, the tape area | region which is not clamped by the fastener element 40 in the element attachment part of the fastener tape 2 can be expanded, and the softness | flexibility and flexibility of a fastener stringer can be improved.

Moreover, since the outer edge part of the trunk | drum 42 in each fastener element 40 and the right-and-left leg part 43 has a predetermined thickness dimension, when attaching the fastener element 40 to the fastener tape 2 and comprising a slide fastener, In plan view of the slide fastener, the outer edge portions of the body portion 42 and the left and right leg portions 43 make it difficult to see the removal portions 46 of each fastener element 40, and the influence of the removal portions 46 on the appearance and appearance of the slide fastener. Can be reduced.

Further, for example, when the slider of the slide fastener is slid in the closing direction, each fastener element 40 that has entered the element guide path of the slider can be appropriately brought into contact with the element guide surface inside the slider. For this reason, the posture of each fastener element 40 can be prevented from tilting in the element guide path of the slider, and the left and right fastener elements 40 can be smoothly meshed.

Note that the thinned portion 46 in the fourth embodiment may be formed to have the position and shape described in the first to third embodiments. In the first to fourth embodiments, the case has been described in which the thinning portion is formed symmetrically on the front and back inner peripheral edge portions of the fastener element, but the thinning portion is one of the elements on the upper surface and the lower surface. It may be formed only on the surface side.

DESCRIPTION OF SYMBOLS 1 Fastener stringer 2 Fastener tape 2a Core string part 10 Fastener element 11 Engagement head 11a Head main body 11b Extension part 12 Trunk part 12a Bridge part 12b Outer part 12c Crotch part 13 Leg part 13a Bending part 14 Engagement convex part 15 Insertion space Part 15a Bottom 16 Dehumidifying part 17 Non-thinning part 18 Tape clamping surface 20 Fastener element 21 Engagement head

21a Head body

21b Extension part 22 Body part 22a Bridge part 22b Outer part 22c Crotch part 23 Leg part 23a Bending part 23b Recessed portion 24 Engagement convex portion 25 Insertion space portion 25a Bottom surface 26 Dehumidification portion 27 Non-removal portion 28 Clamping surface 30 Fastener element 36 Thinning portion 37 Non-thickening portion 40 Fastening element 41 Engagement head 41a Head body 42 Trunk portion 42a Crotch 43 Leg 43a Bending portion 44 Engagement protrusion 45 Engagement recess 45a Bottom surface 46 Removal Part 47 Non-thickening part 48 Tape clamping surface

Claims

The meshing head (11, 21), the trunk portion (12, 22) disposed on one end side of the meshing head (11, 21), and one end of the trunk portion (12, 22) are bifurcated. A pair of left and right legs (13, 23) extending, and the meshing head (11, 21) includes a first main surface and a second main surface opposite to the first main surface. A thin plate-like head body (11a, 21a), meshing projections (14, 24) projecting from the first main surface and the second main surface of the head body (11a, 21a), The meshing projections (14, 24) on the first principal surface side and the second principal surface side are arranged between the meshing projections (14, 24) and the body portions (12, 22). Insertion space portions (15, 25) to be inserted, and tape sandwich surfaces (18, 28) provided on inner peripheral surfaces of the body portions (12, 22) and the left and right leg portions (13, 23). Metal fastener elements (10, 20, 30),
The trunk portion (12, 22) is provided between the insertion space portion (15, 25) and the tape clamping surface (18, 28), and the bottom surface (15a, 25a) of the insertion space portion (15, 25). ) In the element thickness direction, and has bridge portions (12a, 22a) connecting the left and right leg portions (13, 23),
The trunk portion (12, 22) and the left and right leg portions (13, 23) include an inner peripheral edge portion disposed along the tape clamping surface (18, 28) and an outer surface of the left and right elements. An outer edge arranged,
At the outer edge, the thickness dimension between the first main surface and the second main surface is constant,
At least a part of the inner peripheral edge portion on the first main surface side and the inner peripheral edge portion on the second main surface side, the thinned portion (16, 26) in which the thickness dimension is reduced from the outer edge portion. , 36)
Fastener element characterized by that.
A meshing head (41), a body part (42) disposed on one end side of the meshing head (41), and a pair of left and right legs that branch off and extend from one end of the body part (42) (43), and the meshing head (41) includes a head main body (41a) having a first main surface and a second main surface opposite to the first main surface, and the head A meshing protrusion (44) projecting from the first main surface of the main body (41a) and a meshing recess recessed in a bottomed shape from the second main surface of the head main body (41a) A metal fastener element (40) having a recess (45) and having a tape clamping surface (48) on the inner peripheral surface of the body portion (42) and the left and right leg portions (43),
The body portion (42) and the left and right leg portions (43) are an inner peripheral edge portion arranged along the tape clamping surface (48) and an outer edge portion arranged along the outer surface of the left and right elements. And
At the outer edge, the thickness dimension between the first main surface and the second main surface is constant,
At least a part of the inner peripheral edge on the first main surface side and the inner peripheral edge on the second main surface side is a thinning portion (46) in which the thickness dimension is reduced from the outer edge. Arranged,
Fastener element characterized by that.
The fastener element according to claim 1 or 2, wherein the thinning portion (16, 36) is provided with an inclined surface or a curved surface that gradually decreases the thickness dimension toward the tape clamping surface (18).
The fastener element according to claim 1 or 2, wherein the thinning portion (26, 46) is provided with a concave portion that is notched in a step shape on the tape clamping surface (28, 48) side.
The thinning portion (16) is connected to the other leg portion (13) from the tip end portion of one leg portion (13) through a crotch portion (12c) collar disposed on the trunk portion (12). The fastener element according to any one of claims 1 to 4, wherein the fastener element is continuously arranged up to the tip.
The fastener element according to any one of claims 1 to 4, wherein the thinning portion (26, 36, 46) is partially disposed on a part of the inner peripheral edge portion.
The thinning part (36) is arranged in a continuous region extending from a base end part of the left and right leg parts (13) and a crotch part (12c) collar arranged in the trunk part (12). The fastener element according to 6.
The fastener element according to claim 6, wherein the thinning portions (26, 46) are arranged at the tip portions of the left and right leg portions (23, 43), respectively.
In the plan view of the fastener element (10, 20, 30, 40) flange, the thinned portion (16, 26, 36, 46) flange is formed between the tape clamping surface (18, 28, 48) and the leg portion. The fastener element according to any one of claims 1 to 8, wherein the fastener element is arranged with a dimension of 5% or more and 50% or less of a dimension between the outer side surface.
10. The thinning portion (16, 26, 36, 46) is disposed on both sides of the first main surface and the second main surface symmetrically with respect to each other. Fastener element.
The fastener elements (10, 20, 30) according to any one of claims 1 to 10, are arranged at a predetermined pitch along a tape length direction on a tape side edge of the fastener tape (2),
When the size of the pitch of the fastener elements (10, 20, 30) is P, and the distance between the outer peripheral surfaces of the adjacent fastener elements (10, 20, 30) is D1, D1 <(P -D1) is satisfied,
Fastener stringer characterized by that.
12. The relationship D2> (P−D1) is satisfied, where D2 is an interval between the tape clamping surfaces (18, 28) of the adjacent fastener elements (10, 20, 30). The fastener stringer as described.