Yarn break switch for nylon zipper sewing machine

Abstract

A yarn break switch for a nylon zipper stitching machine comprises a fixing plate, a yarn passing board mounted on the fixing plate, at least one induction block, a fixing bar and a conductive bar, wherein at least one yarn inlet hole is formed in one side of the yarn passing board, at least one yarn outlet hole is formed in the other side, a fixed end of the induction block is rotatablly arranged on the fixing bar in a sleeving manner, and yarn arranging holes are formed in a free end of the induction block, and are located below the yarn inlet hole and the yarn outlet hole; the conductive bar is located below the induction block; yarn passes through the yarn inlet hole, the yarn arranging holes and the yarn outlet hole in sequence to be fed and conveyed, when the yarn is broken, the induction block falls by own gravity, and abuts against the conductive bar, so that the fixing bar and the conductive bar are electrically connected. The yarn break switch can detect whether the yarn (which can be subdivided into bottom yarn and upper yarn) in production of the nylon stitching machine is broken constantly, and stopping can be performed timely in case of yarn breaking; therefore, accuracy is high, and product quality is stabilized.

Description

technical field [0001] The invention relates to a detection device for yarn breakage or thread breakage, in particular to a yarn breakage switch for a nylon zipper sewing machine. Background technique [0002] At present, the nylon zipper sewing machine adopts the yarn breakage switch, which cannot achieve the desired effect. At present, the industry mainly uses the breakage switch group, which mainly has the following disadvantages: [0003] (1) The yarn material of the nylon zipper sewing machine is intermittently used. When the sewing needle moves downward, the material is used and then returned. This kind of up and down movement reciprocating movement, if the ordinary thread breaking switch is used, the sewing machine will not be interrupted. The frequency of line shutdown is high, which seriously affects on-site production; [0004] (2) The friction between the yarn of the nylon zipper sewing machine and the thread break switch group produces a large amount of hairines...

AI Technical Summary

Problems solved by technology

[0007] The invention provides a yarn breakage switch of a nylon zipper sewing machine, the main purpose of which is to overcome the defect of low accuracy existing in the detection equipment of the existing breakage switch group

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