Sewing machine comprises corner cutting mechanisms with corner cutters, a unit for selecting the corner cutters, a vertical movement mechanism for moving the corner cutters in the vertical direction, adjusting units and a control unit

摘要

Sewing machine comprises corner cutting mechanisms (100A, 100B) with corner cutters (101, 103), a selecting unit (120) for selecting the corner cutters, a vertical movement mechanism (130) for moving the corner cutters in the vertical direction, adjusting units and a control unit for controlling a sewn material advancing mechanism and the corner cutters. Preferred Features: The selecting unit has a positioning motor (121) which moves each of the corner cutters in a direction perpendicular to the sewn material advancing direction.