Sartorius with thread-cutting device

Abstract

In a thread cutter device which comprises a movable knife which can swing back and forth inside a horizontal plane, a fixed knife and a thread clipper plate which can elastically clip an end of a thread with the movable knife after cutting, a movable knife driving mechanism comprises a driving connecting linkage whose end is connected with a position displaced a little from a swinging central shaft of the movable knife and is extended in a cylindrical bed towards garment feed direction and an air cylinder which has a movable rod section which is fixed at a rear anchor side in the cylindrical bed and connected to the other end of the driving connecting linkage . To reduce the number of components so that a reduction in cost, facilitation of attachment and rationalization can be attained, and handling of cloth under sewing is made easier so that workability can be improved and sewing mistake can be reduced.

Description

technical field [0001] The present invention relates to a sewing machine with a thread cutting device which is suitable for sewing tubular parts such as necklines and cuffs of T-shirts and interlock seams. In particular, it relates to the following multi-needle cylinder sewing machine: there is a cylindrical seat suitable for sewing a cylindrical part, and a needle plate is fixed on the free end of the cylindrical seat perpendicular to the direction of the cylinder axis, and the needle plate has a needle drop mechanism. There are holes and grooves for feed dogs that feed cloth in the direction of the cylinder axis. A looper is provided at the lower part of the needle plate, and a needle thread and a looper that will be positioned between the needle plate and the looper after sewing are provided on the side of the needle plate. Thread trimming device that guides the needle thread to the side and cuts it off. Background technique [0002] The thread cutting device of this mul...

AI Technical Summary

Problems solved by technology

Therefore, when the cylindrical part as the product to be sewn is inserted from the free end of the cylindrical seat to perform a predetermined sewing operation, the exposed part or the protruding part, etc. including a part of the operating link will come into contact with the The large sewing materials of the front and rear bodies abut or touch, making it difficult to handle the sewing materials. As a result, the efficiency of sewing workability may not be improved.

In addition, since there are many components for interlocking connection of the movable cutter and the driver, there is a problem that it takes a lot of work to assemble these components when the thread trimmer is attached to the sewing machine.

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