Hemming sewing machine for round fabrics

Abstract

The invention provide a hemming sewing machine for round fabrics, which comprises a sewing machine main body, a fabric edge position adjustment mechanism having a gripping member at the other end of the fabric, a first fabric edge position detector, and a second fabric edge position detector, and further comprises a control unit that drives the fabric edge position adjustment mechanism to move ina specific direction based on a detection result of the first fabric edge position detector to adjust the one end side edge of the round fabric to a specified position, based on a detection result ofthe second fabric edge position detector, while the hemming is continued, moves a fabric guide to a position close to the left lateral outer side of the sewing machine main body M, and thereafter, stops the sewing machine drive after passing over the specified length of the hemming. As a result, the hemming sewing start and end portions of the lower hem portion of the round fabric can be aligned to a straight line, and the hemming sewing with good appearance can be appropriately performed over the entire circumference of the lower hem portion.

Description

technical field [0001] The present invention relates to a hemming sewing machine for circular material, for example, by using a double-needle horizontal cylindrical double-thread overlock sewing machine to arrange one end edge of the entire circumference of the hem of a circular material such as a T-shirt at a ratio. The needle drop part of the sewing part is folded downward with a predetermined width by the fabric end edge return guide device at the upstream side of the sewing travel direction to overlap up and down, and the folded part that overlaps up and down is sewn by the sewing part. Background technique [0002] For example, when using a double-thread lockstitch sewing machine to sew the hem around the hem of a circular material such as a T-shirt, it has conventionally been common for the sewing operator to hold one end of the material with his right hand. The hem part of the sewing machine is guided toward the sewing part of the sewing machine to guide the conveyanc...

AI Technical Summary

Problems solved by technology

[0003] But under the situation of the artificial assistance that usually carries out in the past as above-mentioned, one end side edge portion of circular object material can be in the direction perpendicular to the direction of sewing advance (hereinafter referred to as left and right directions), the position of one end edge of the hem part deviates from the specified position due to this displacement, and the hem part tends to deviate to the left from the sewing part of the sewing machine. As a result, the following problems will be caused: Excessive or insufficient return width makes it difficult for less skilled sewing workers to perform proper hemming sewing

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