| 摘要 |
Sewing machine includes: a needle bar driven to move up and down to perform sewing operation; a jump mechanism electrically controlled to bring the needle bar to a jump sewing state; a holder member controlled to move, in synchronism with the up-and-down movement of the needle bar, for holding a sewing workpiece from above when the holder member is in its lowered position; and a holder mechanism for, when the sewing operation is to be stopped, moving the holder member upward to a predetermined evacuating position and mechanically retaining the holder member in the evacuating position; and an interlocking mechanism for mechanically retaining the needle bar in the jump sewing state in interlocked relation to the holder member being mechanically retained in the evacuating position. Thus, even when a sudden power failure has occurred, the needle bar of each machine head set in a resting state can be reliably retained in the jump sewing state, which can avoid deformation or breakage of component parts that might result from undesired descending movement of the needle bar.
|
