Chain double-needle sewing machine

Abstract

The invention provides a chain double-needle sewing machine. The chain double-needle sewing machine comprises a sewing machine body and a machine needle assembly; the sewing machine body is provided with a horizontal rotating shuttle and a band knife presser foot; the machine needle assembly is vertically connected to a machine head of the sewing machine body, the power input end of the machine needle assembly is connected with a power shaft rod of the sewing machine body, and the machine needle assembly is provided with two needle rods which are distributed in the front-back direction of the sewing machine body at intervals; and the rotating thread hanging frequency of the horizontal rotating shuttle is two times of the up-down lifting frequency of the power shaft rod, the two needle rods have a narrowing state in which the two needle rods stop above the band knife presser foot together and also have a sewing state in which the two needle rods alternately move up and down, and in the sewing state, the horizontal rotating shuttle sequentially hangs upper threads on the two needle rods. According to the chain double-needle sewing machine provided by the invention, the two needle rods can be matched with the horizontal rotating shuttle to form two overlapped sewing threads which form a chain independently, so that the sewing strength is improved; and the two sewing threads can be highly overlapped, so that the sewing appearance quality is good.

Description

technical field [0001] The invention belongs to the technical field of sewing machines, and in particular relates to a chain double-needle combined sewing machine. Background technique [0002] At present, in garment processing, double-needle sewing machines are used more and more frequently. Double-needle sewing machines perform sewing operations at the same time through two needle bars arranged side by side, so as to process two parallel or overlapping suture line structures at one time. , as customer needs become more and more diversified, some apparel products have put forward the requirement of overlapping sewing of two suture lines in order to improve the reliability of sewing. The synchronous action of the double needles makes the stitching line formed by a single needle movement be the form of two upper threads hooked with one bottom thread at the same time to form a chain. Although this method can form two stitching lines with better decorative effects, it cannot fo...

AI Technical Summary

Problems solved by technology

[0002] At present, in garment processing, double-needle sewing machines are used more and more frequently. Double-needle sewing machines perform sewing operations at the same time through two needle bars arranged side by side, so as to process two parallel or overlapping suture line structures at one time. , as customer needs become more and more diversified, some apparel products have put forward the requirement of overlapping sewing of two suture lines in order to improve the reliability of sewing. The synchronous action of the double needles makes the stitching line formed by a single needle movement be the form of two upper threads hooked with one bottom thread at the same time to form a chain. Although this method can form two stitching lines with better decorative effects, it cannot form The reliability effect of the secondary stitching is therefore not applicable to the overlapping sewing process aimed at improving the firmness of the stitching. At present, only a single-needle sewing machine can be used to repeat the stitching operation twice, but this cannot guarantee the safety of the stitching thread twice. Absolutely coincident positions, thus resulting in a poor seam appearance and inefficient work due to the need for a secondary seam

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