Double-needle cup seaming machine

Abstract

A double-needle overlock sewing machine, comprising: an outer claw formed as a part of a needle plate and extending along the feeding direction, a middle claw parallel to the outer claw and slidably arranged along the extending direction thereof, and an outer claw arranged on the needle plate The empty wire loop holder and cutter at the front. The sewing machine has: a presser foot disposed above the needle plate, an urging member for urging the presser foot toward the needle plate, and a rotatably supported back surface of the sewing machine frame against the urging force of the urging member. Presser foot lifter that raises the presser foot from the needle plate. The middle claw is connected with the presser foot handle, and when the presser foot is raised by the operation of the presser foot handle, the front end of the middle claw is hidden by the open pinhole of the needle plate. Accordingly, it is possible to provide a double-needle overlock sewing machine capable of operating the middle claw with a low-cost structure and without impairing the operator's workability of the material.

Description

technical field [0001] The invention relates to a double-needle overlock sewing machine with the function of sewing empty thread loops. Background technique [0002] Such a sewing machine, as shown in Japanese Patent Publication No. 2-30277, has outer claws formed as part of the needle plate, middle claws slidably provided, and an empty thread loop holder and cutter disposed in front of the needle plate. The outer claws are extended along the feeding direction, and the middle claws are arranged in parallel with the outer claws. [0003] Yet, when the empty thread loop operation after sewing, must make the middle pawl retreat to the front with the manual operation mechanism, the operator can't handle the cloth with both hands at this moment. In addition, in order to slide the middle claw with an appropriate timing by using the electromagnetic coil, a control device is required, which raises a problem of cost increase. [0004] Therefore, an object of the present invention i...

AI Technical Summary

Problems solved by technology

[0003] However, when operating the empty thread loop after sewing, the middle claw must be retracted to the front with a manual operating mechanism, and the operator cannot handle the cloth with both hands at this time.

In addition, in order to slide the middle claw at an appropriate timing by using the electromagnetic coil, a control device is required, which raises the problem of cost increase.

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