Rear belt cutting device of double-needle lockstitch sewing machine

Abstract

The invention relates to a rear belt cutting device of a double-needle lockstitch sewing machine. In an operation process, a moving cutter is controlled by an air cylinder to move up and down along aguide rail, so as to mesh with a fixed cutter on a needle plate to cut belts. The technical scheme includes that a slider component and a detector support are arranged in parallel on the lower portionof one side face of a rail mounting plate, a first photoelectric detection head is arranged on an inner connecting lug of the detector support, and a slider cover plate is fixedly arranged on the right side face of the slider component; the moving cutter is vertically arranged in a slot on the right side face of a moving cutter holder, a threaded shaft is penetratingly arranged on a recessed surface of the slot, and a slotted hole is formed in the lateral side of the moving cutter holder; two stepped through holes are formed at the joint of two sides of the moving cutter holder; a pair of press plate shafts of an 'E'-shaped snap spring are clamped into an upper ring groove, and pass through the stepped through holes to be fixedly connected with a press plate below the longitudinal side ofthe moving cutter holder; springs sleeve the press plate shafts, and are arranged in large holes on the lower portions of the stepped through holes; the fixed cutter is arranged on the needle plate,and a second photoelectric detection head is arranged on the lower portion of the fixed cutter.

Description

technical field [0001] The invention relates to the field of sewing machines, in particular to a rear tape cutting device for a double-needle lockstitch sewing machine. Background technique [0002] The automatic tape cutting mechanism of the current double-needle lockstitch sewing machine only has a moving knife, and the cutting knife and cutting board on the needle plate have a high damage rate after long-term use. Cut off and so on, greatly reducing the qualified rate of products, while increasing labor costs. Contents of the invention [0003] In view of this, the present invention provides a rear tape cutting device for a double-needle lockstitch sewing machine in order to solve the problem of high damage rate of the cutting knife and chopping board on the automatic tape cutting mechanism and the unevenness of the incision of the sewing material. The cylinder controls the moving knife to move up and down along the guide rail, so as to engage with the fixed knife on t...

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention provides a rear tape cutting device for a double-needle lockstitch sewing machine in order to solve the problem of high damage rate of the cutting knife and chopping board on the automatic tape cutting mechanism and the unevenness of the incision of the sewing material. The cylinder controls the moving knife to move up and down along the guide rail, so as to engage with the fixed knife on the needle plate to cut the belt

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