Slide fastener

Abstract

A slide fastener (1, 21, 31, 41) has an element array (2) formed of coiled or zigzag continuous fastener elements (5), wherein a butterfly bar (11, 23, 33, 43) or a box bar (12, 34, 44) arranged on one fastener stringer (3) is provided, at the end thereof on the side of the element array, with a first hook portion (11c, 23c, 34c, 43c) formed integrally and over the front and back surfaces of a fastener tape (4), and a synthetic-resin mesh reinforcement (9, 29, 39) formed independently of the box bar (12, 34, 44) or the butterfly bar (11, 23, 33, 43) and over the front and back surfaces of a fastener tape (4) is arranged between the element array (2) and the box bar (12, 34, 44) or the butterfly bar (11, 23, 33, 43) arranged on the other fastener stringer (3). The mesh reinforcement (9, 29, 39) has a second hook portion (9b, 29b, 39b) engaging with the first hook portion (11c, 23c, 34c, 43c), and a protrusion (9c, 29c, 39c) protruding in the direction reverse to the orientation of the second hook portion (9b, 29b, 39b) of the mesh reinforcement (9, 29, 39) and engaging with the fastener element (5) contiguous to the first hook portion (11c, 23c, 34c, 43c). Consequently, the slide fastener exhibits an excellent flexibility, has an enhanced mesh strength at the ends of the element array (2) on the sides of the butterfly bar (11, 23, 33, 43) and the box bar (12, 34, 44), and can prevent mesh crack from occurring in the element array (2) even if an opening tool (10, 32, 42) is subjected to an upthrust force.

Description

technical field [0001] The invention relates to a slide fastener having a split insert with a cannula and a seat tube, and in particular to a slide fastener in which the element row is formed by a helical or serrated continuous zipper element, even if the element When the columns are in the meshed state, they bear the jacking force, and the meshing cracks are not easy to occur, and the meshing strength is high. Background technique [0002] In the past, a pair of left and right fastener stringers were formed by sewing spiral or zigzag continuous fastener elements formed of thermoplastic resin monofilaments on opposite side edges of the left and right fastener tapes. A slider is inserted through the element row of the chain belt, and a separate insert having an insertion pin and a seat tube is attached to one end of the element row to form a slide fastener. [0003] Moreover, an example of the separate insert provided in the slide fastener to which the above-mentioned spiral...

AI Technical Summary

Problems solved by technology

Therefore, when the separating insert 62 is subjected to a push-up force in the direction of the belt front and back, the insertion plate portion 67a is easily bent or deformed, and there is a disadvantage that the position of the insertion body 67 is easily displaced.

[0034] Therefore, for a slide fastener equipped with a spiral or zigzag continuous fastener element having a lower meshing strength than a single synthetic resin fastener element, if the side-opening type separate insert as in the above-mentioned Patent Document 2 is used, , when the element row and the separation insert are subjected to a jacking force, the meshing split is more likely to occur from the end of the element row on the side of the separation insert

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