Ykk Corporation

Hideo Shimai

Kazuki Kuse

Mitsuru Yamakawa

Masao Matsumoto

Osamu Fujii

Toyoo Morita

Akira Sakai

Hideki Akiyama

The space forming apparatus includes at least a pair of fixed grippers disposed in a lower part thereof; a pair of movable grippers disposed with a gap in a front-to-rear direction such that the movable grippers are movable in a vertical direction toward and away from the aforementioned fixed grippers; a knock-out which is provided between the fixed grippers and moves vertically between said fixed grippers and between the movable grippers; and a punch section which is disposed so as to oppose a top end of the knock-out and which moves vertically and independently between the front and rear movable grippers and cuts coupling heads of coupling elements while pressing the coupling heads downward at the time of cutting. These members are accommodated integrally in a single housing having a chain insertion opening provided in a front face thereof.

Space forming apparatus for a slide fastener chain

A method for forming ends of a slide fastener chain wherein, coil-shaped fastener elements such as linear fastener elements are attached and sewed to side edge portions of a pair of fastener tapes with sewing yarns as fixing yarns while a core thread is inserted through the fastener elements. The coil-shaped fastener elements are cut off at leg portions, each of which is in contact with the fastener tape, at ends of the fastener elements, so that cut end portions are formed. These cut end portions are pushed inward of the side edge portions, and then, the leg portions and inverted portions thereof are fused to the fastener tapes by heating. As a result, each end of the fastener elements is stabilized, so that the resultant slide fastener is safe.

Method for forming an end of slide fastener chain

According to the fastener chain, method and apparatus for forming ends thereof, coil-shaped fastener elements as linear fastener elements are attached and sewed to side edge portions of a pair of fastener tapes with sewing yarns as fixing yarns while a core thread is inserted through the fastener elements. The coil-shaped fastener elements are cut off at leg portions, each of which is in contact with the fastener tape, at ends of the fastener elements, so that cut end portions are formed. These cut end portions are pushed inward of the side edge portions, and then, the leg portions and inverted portions thereof are fused to the fastener tapes by heating. As a result, a form of each end of the fastener elements is stabilized, so that the resultant slide fastener is good in safety.

Apparatus for end forming of slide fastener chain

In the fastener-chain-finishing apparatus, only a knockout among plural members arranged below a fastener-chain-transfer path of a space-forming unit can move up and down but all the other members are not movable. Consequently, the units below the chain-transfer path can be compact. Further, main bodies of movable grippers and a punch of the space-forming unit, which have a length equal to a space-forming length of the fastener chain and are arranged above the chain-transfer path, have end surfaces that are exposed outside and are flush with each other at least on a side of a stopper-attaching unit arranged adjacent to them. As a result, all the operating members of the space-forming unit can be arranged so as to contact with the stopper-attaching members of the stopper-attaching unit. Therefore, it is possible to form a space on the slide fastener chain to which particularly coil-shaped continuous coupling elements are attached by sewing thread, simultaneously with attachment of the stopper, which was conventionally impossible to achieve.

Fastener-chain-finishing apparatus

Slide fastener chain, method and apparatus for forming end thereof

In forming an element-free space portion in a continuous fastener chain, legs of a number of metallic fastener elements, which legs exist on one side of the fastener chain are cut by a pair of cutting blades, and then coupling heads of the fastener elements and the legs extending from the coupling heads and existing on the other side of the fastener chain are removed from cores of fastener tapes while being clamped by a punch and a die. Therefore, it is possible to remove the fastener element portions from the fastener tapes without damaging the cores and not to require so high precision in positioning the fastener elements at a cutting station, thus the structure of a slide fastener chain manufacturing machine can be simple and hence the rate of production is improved.

Growing community of inventors

Toyama-ken, Japan

Hideo Shimai