| 摘要 |
A machine tool and pallet standby station using a crane for changing a pallet between a table or pallet mounting table (27) of the machine tool and the pallet standby station are provided. The table (27) includes a plurality of guide pins (31) having tapered front ends, a plurality of elevatable lift pins (35) having spherical front ends, and a plurality of taper cones (37) having tapered outer peripheral surfaces. On the other hand, the pallet (P) includes at least two brackets (39) attached so as to project in the side directions from the two side surfaces of the pallet, and each bracket is formed with a guide hole (41) into which a guide pin (31) is inserted for rough positioning of the pallet. Further, the bottom of the pallet (P) is formed with a plurality of locate holes (45) having tapered inner peripheral surfaces and engaging with the spherical front ends of the lift pins for precision positioning of the pallet and a plurality of taper holes (47) having shapes complementary with the taper cones (37) and engaging with the taper cones for final positioning of the pallet. |
