摘要:
A sewing thread (20) can be captured certainly with a thread capturing open eye (13a) of an open eye needle (13) and the stitches are formed in the inner space of a sewing machine bed (3). A handstitch and a locked stitch are formed, respectively, on the front surface and the back surface of a fabric workpiece (21) as a skip stitch set through cooperation of the open eye needle (13), a shuttle hook (200) and a thread draw out actuator (401). A feed dog (601) feeds the fabric workpiece by a stitch length (P1) for handstitch during a first stroke of the open eye needle (13), and feeds the fabric workpiece by an inter-stitch pitch (P2) between the handstitches during a second stroke of the open eye needle (13).
摘要:
A safety device is not required for avoiding a transition to a stitch forming state from a looper threading state during a gas supply operation of a gas supply pump, and a threading can be performed more easily with one-touch operation to a looper by one-handed operation of small number of times on the operation for being simplified on mechanism. An engaging clutch (60) for respectively transmitting power from a sewing machine motor (M) to a drive shaft (5) driving a stitch forming device including the looper at the time of the stitch formation or to the gas supply source (40) at the time of the looper threading comprises a structure which is moved to one of a gas supply drive member (61) which transmits the power to the gas supply source and a stitch forming drive member (64) which is fastened to one end of the drive shaft and transmits the power to the stitch forming device so that approach/separation becomes free depending on a manual operation of a looper threading/stitch forming changeover manual operating portion and transmits the power from the sewing machine motor through a clutch hollow shaft (22) and retains a connecting state when connecting to the gas supply drive member.
摘要:
A safety device is not required for avoiding a transition to a stitch forming state from a looper threading state during a gas supply operation of a gas supply pump, and a threading can be performed more easily with one-touch operation to a looper by one-handed operation of small number of times on the operation for being simplified on mechanism. An engaging clutch (60) for respectively transmitting power from a sewing machine motor (M) to a drive shaft (5) driving a stitch forming device including the looper at the time of the stitch formation or to the gas supply source (40) at the time of the looper threading comprises a structure which is moved to one of a gas supply drive member (61) which transmits the power to the gas supply source and a stitch forming drive member (64) which is fastened to one end of the drive shaft and transmits the power to the stitch forming device so that approach/separation becomes free depending on a manual operation of a looper threading/stitch forming changeover manual operating portion and transmits the power from the sewing machine motor through a clutch hollow shaft (22) and retains a connecting state when connecting to the gas supply drive member.
摘要:
A thread can be captured surely by the thread capturing open eye of a needle and a stitch can be formed in the space within a machine bed. A handstitch on the front surface of a fabric workpiece and a locked stitch on the back surface are formed as a skip-stitch set by cooperation of a open eye needle (13), a rotary hook (200) comprising a rocking bobbin casing (205) loaded in a rotative outer rotary hook (202), and a thread draw out actuator (401). In the first stroke of the open eye needle (13), a stitch length feed of the fabric workpiece for handstitch is performed by a feed dog (601). In the second stroke of the open eye needle (13), an inter-stitch pitch feed of fabric workpiece for inter-handstitch is performed by a feed dog (601).