Automatic thread cutting device for sewing machine provided with horizontal loop taker

摘要

Disclosed is an automatic thread cutting device for a sewing machine which is provided with a horizontal loop taker, wherein a thread catching member 4 is operated in response to a thread cutting instruction to reciprocatingly move with a movable blade 5 along a predetermined course, the thread catching member 4 normally catching the upper thread when moving in the return-way of reciprocation to guide the upper thread to a fixed blade 14 which is provided to cut the upper thread in cooperation with the movable blade 5, and wherein a thread regulating means is provided to cut the lower thread 29 d together with the upper thread, the thread regulating means being operated to press down the lower thread 29 d to a position where the lower thread 29 d is caught by the thread catching member 4 in addition to the upper thread when the thread catching member 4 is moving in the return-way of reciprocation.