Patent ID: 7600481
Filing Date: 2009-10-13
Classification: D05B

Abstract:
1. A device for driving an upper looper of a sewing machine, the device comprising: an upper looper driving shaft provided so as to be rotatable around an axis thereof; an upper looper holder comprising an upper end portion at which the upper looper is held; an upper looper swinging arm comprising one end portion supported by the upper looper driving shaft such that a position of the upper looper swinging arm with respect to the upper looper driving shaft is adjustable along an axial direction of the upper looper driving shaft, and the other end portion to which the upper looper holder is rotatably coupled; and an upper looper guide holding an intermediate portion of the upper looper holder such that the upper looper holder is slidable with respect to the upper looper guide, wherein the upper looper guide is supported by a frame of the sewing machine such that a position of the upper looper guide with respect to the frame is adjustable along a direction parallel to the axial direction of the upper looper driving shaft, and wherein the axial direction of the upper looper driving shaft is substantially parallel to a direction in which a cloth is fed during a stitching work with the sewing machine.