A chain double needle sewing machine

Abstract

The invention provides a chain double-needle joint sewing machine, which comprises a sewing machine body and a needle assembly; the sewing machine body has a horizontal hook and a presser foot with a knife; the needle assembly is vertically connected to the machine head of the sewing machine body, and the power input end Connected with the power shaft of the sewing machine body, the needle assembly has two needle bars spaced along the front and back directions of the sewing machine body; wherein, the frequency of the horizontal hook's rotation and thread hanging is twice the frequency of the power shaft's up and down, two The two needle bars have a narrowing state that stops at the top of the knife presser foot, and also have a sewing state that alternately moves up and down. In the sewing state, the horizontal hook hangs and picks up the upper thread on the two needle bars in turn. In the chain double-needle seaming machine provided by the present invention, the two needle bars can respectively cooperate with the horizontal rotary shuttle to form two superimposed suture lines independently forming a chain, thereby improving the suture strength, and the two suture lines can be highly overlapped, Stitching looks good quality.

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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