| 摘要 |
PURPOSE:To improve accuracy in rotation and machining by making claws unclamp when both pistons for operating plungers are moved in each direction respectively, and making said claws clamp when said both pistons are restored, separating a work carry from an operating mechanism. CONSTITUTION:When oil, which is fed under pressure through a pressure passage 73, flows into a pressure chamber 69, a rear side piston 65 is moved backward and an operating flange part 70 is brought in contact with the front faces of the four supporting part 55, to support a work carry 41, whereas, a front side piston 67 is moved forward with its front side being brought in contact with plungers 53, which, in turn, is moved forward, causing both clamping claws 45, 45 to unclamp. When the pressure oil flows out by opening the passage 73, the piston 65 is restored by means of springs 71, causing the operating flange part 70 to be separated from the supporting parts 55, whereas, the piston 67 is restored by means of the springs 72 and separated from the plungers 53, both of the clamping claws 45, 45 clamp a workpiece W by means of four springs 48, and the plungers 53 are restored to their original positions, separating the work carry 41 from an operating mechanism 61. |
