Fly sewing machine

Abstract

Provided is a fly sewing machine that ensures stable fly feeding, and makes it possible to properly attach a fly to a slide fastener chain, even if the fly is short. The fly sewing machine is equipped with: a fly supply unit (10) that supplies a fly (F) to a transfer passage (3); a fly transfer unit (20) that transfers and sends the fly (F) that has been supplied by the fly supply unit (10) toward the downstream side; a chain feed unit (50) that feeds a slide fastener chain (C) to the fly (F) that has been sent by the fly transfer unit (20); an auxiliary conveyance unit (60) that presses the fly (F) and the slide fastener chain (C), which have been aligned overlappingly by the chain feed unit (50), from above or below, and sends the fly (F) and the slide fastener chain (C) toward the downstream side; and a sewing machine part (70) that sews together the fly (F) and the slide fastener chain (C), which have been sent by the auxiliary conveyance unit (60).

Description

technical field [0001] The present invention relates to a fly sewing machine which continuously sews a plurality of fly consisting of material pieces such as a front fly of trousers to a long zipper chain. Background technique [0002] As a conventional fly sewing machine, there is known a sewing machine including: a fly supply unit that supplies a fly from the upstream side along a fly transfer path provided on a stand; and a fly transfer unit that feeds the fly from the fly supply unit The supplied fly is sequentially sent to the downstream side; the transfer speed adjustment part transports the fly transferred from the fly transfer part to the sewing part on the downstream side at the required timing; and the long chain supply part is set at the transfer speed Between the adjusting part and the sewing part, and the continuous zipper chain is fed into the sewing part in synchronization with the sewing speed of the sewing part (for example, refer to Patent Document 1). [...

AI Technical Summary

Problems solved by technology

[0006] However, in the fly sewing machine described in Patent Document 1, the length of the fly is shorter than the distance between the feed-out position of the feed speed adjusting section and the position of the pusher of the sewing section ( In the case of a fly used for children's pants), in this section, based on the pushing force of the next fly sent out from the transfer speed adjustment part and the friction force with the zipper chain supplied from the long chain supply part, If the fly is conveyed downstream, the conveyance of the fly tends to become unstable, and the fly cannot be sewn normally to the long chain of the zipper.

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