JUMP SEWING DEVICE FOR SEWING MACHINE HAVING SIMPLE STRUCTURE AND ARRESTING NOISE

摘要

PURPOSE: A jump sewing device for a sewing machine is characterized by arresting noise, having simple structure and simplifying motions of the inside thereof in jump-sewing. CONSTITUTION: A jump sewing device for a sewing machine comprises: a sewing shaft capable of rotating; a first delivery device changing rotational motion of the sewing shaft into reciprocal motion and delivering the motion; a needle rod(20) installed a sewing needle(21) and reciprocal-moved by the reciprocal motion of the first delivery device; a second delivery device delivering the reciprocal motion of the needle rod(20); a fabric presser pressing fabric; and a fabric presser guiding rod reciprocal-moved by reciprocal motion delivered by the second delivery device. The jump sewing device is worked by: separating the needle rod(20) from the fabric; stopping the first delivery device to stop the needle rod(20) and the fabric presser guiding rod; and transferring the fabric as proper length.