HYDRAULIC CLAMP APPARATUS HAVING ROTARY FUNCTION

摘要

This hydraulic clamp apparatus (42) having a rotary function minimizes the effects produced by a check valve. The apparatus has: an actuator (54) operated by operating oil; a plurality of chuck jaws (51) for interlocked operation in association with the actuator (54); a rotation support (56) to which a device body (50) provided with the actuator (54) and the chuck jaws (51) is rotatably attached; and a check valve (70) situated on the rotation axis (510) of the rotating device body (50), on the flow channel for the operating oil that operates the actuator (54).