Chain type manual sewing machine

Abstract

The invention discloses a chain type manual sewing machine, comprising a mounting rack and a machine head positioned on the mounting rack, wherein the machine head is provided with a stitching mechanism; the stitching mechanism comprises a threading needle and a crochet hook which are arranged side by side; a gap is reserved between the threading needle and the crochet hook; a crochet hook deviceused for cooperating with the stitching mechanism for hooking threads and a thread cutting device for cutting wool are arranged under the mounting rack; the thread cutting device comprises a thread cutting cylinder and a thread cutting piece which is driven to move by means of the thread cutting cylinder. After threading needle of the stitching mechanism carries the wool and passes through cloth,a thread is hooked out by means of the crochet hook after being hooked into a ring shape by means of a thread hooking device; the steps are performed when the cloth is continuously moved, so that thethreading needle just passes through the wool ring hooked by the crochet hook when passing through the cloth downwards, and a chain type stitched edge is further formed. When the thread needs to be cut, the stitching mechanism is stopped when passing through the cloth and the wool ring formed by thread hooking of the thread hooking device; since the wool is not jointed with the stitching mechanism, the thread cutting cylinder drives the thread cutting piece to move, and a thread cutting action is further completed.

Description

Technical field [0001] The invention relates to a sewing machine, in particular to a chain type bead edge machine. Background technique [0002] The chain bead edge machine is a kind of sewing machinery. In the working process of the chain bead edge machine, the straight needle and the crochet needle reciprocate up and down, and then the thread feeding needle is moved away from and close to the crochet needle. The crochet needle is in a plane perpendicular to the movement plane of the thread feeding needle. Make a reciprocating swing. Pass the thread through the thread hole on the straight needle. After the straight needle carries the thread through the fabric on the workbench, the thread feeder pushes the thread in the thread hole to the crochet needle, and the crochet needle passes through the fabric on the workbench. The thread hook on the crochet needle is under the workbench, and a cycle of sewing is completed at this point. [0003] The utility model patent with applicatio...

AI Technical Summary

Problems solved by technology

[0004] But there is following problem in this utility model: because be to stretch into the position between thread-feeding needle and crochet needle by cutting knife and cooperate with crochet needle to cut wool, so crochet needle also can receive effect in the process of cutting Force, the thicker the wool, the greater the force on the crochet needle, and the easier it is to bend and deform

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