| 摘要 |
PURPOSE:To chuck a work with no distortion by use of a proper chuck by providing multiple chucks chucking a work being energized by a spring force. CONSTITUTION:When a rod 23 is lowered, the tip 24a of a bracket 24 is brought into contact with the first claw 18. When it is further lowered, it presses the first claw 18 against the spring force, the claw 18 is rotated clockwise, an the lock between the first claw 18 and notches 16 is released. And when the rod 23 is further lowered, the second claw 25 is released from notches 16a. Under this condition, a work 15 is chucked by three chucks 12 without receiving distortion, and the work 15 is ground by rotation of a plate 11. |
