PURPOSE: To eliminate a positioning mechanism from a part holding device to aim at reducing the cost of a part gripping device, by providing a gripping pawls which are attached to a movable member of a rectilinearly moving type actuator inclined with respect to the elevating center axis of a screw fastening machine and directed to the working position of the screw fastening device.
CONSTITUTION: An air cylinder 32 as a rectilinearly moving type actuator which is inclined so as to be directed to the working point 31 of a screw fastening part 8 is secured by means of an attaching plate 33, and a piston rod 34, as a movable member, in an air cylinder 43, is attached at its front end with a gripping mechanism 36 having pawls 35 which is opened upon retraction of the piston rod 34 but is closed upon maximum extension of the same. The gripping mechanism 36 is laid in a position which is shifted from the elevating center axis 37 of the screw fastening part 8 in its stand-by condition, and the cylinder 32 is attached in an inclined direction toward the working point 31 of the screw fastening part 8 so that the gripping mechanism 36 is timedly extended to the working point 31 to grip a part P.
| JPH0475879 | MOTOR DRIVEN SCREW DRIVER |
| WO/2003/016728 | SELF-ATTACHING FASTENER |
OOSAKI SHINJI
TAKADA HIDETO
| JPS4910499A | 1974-01-29 | |||
| JPS5231593A | 1977-03-10 |