| 摘要 |
In a reference block (1), a center hole (20) having a tapered inner surface (23) narrowing downward is provided. A rigid sleeve (21) having a tapered outer surface (27) making a tapering engagement with the tapered inner surface (23) is supported by the reference block (1) axially movably. During a locking drive, an output member (48) inserted into the rigid sleeve (21) is moved downward. Then, a clamping member (33) inserted into a socket hole (3) of a work pallet (2) is moved downward against an elastic member (45) and radially-outwardly for locking, and the tapered outer surface (27) of the rigid sleeve (21) makes a tapering engagement with the tapered inner surface (23).
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