Patent ID: 7168695

Claim:
A positioning apparatus, comprising: a support surface ( 1 a ) of a first block ( 1 ), supporting a surface ( 2 a ) to be supported of a second block ( 2 ); a central pillar ( 11 ) projecting from the support surface ( 1 a ) toward a leading end, and fixed to the first block ( 1 ); an engaging member ( 12 ) inserted into an engaging hole ( 3 ) opened in the surface ( 2 a ) to be supported, and supported onto the first block ( 1 ) in an outer peripheral space of the central pillar ( 11 ); a wedge space (W) narrowing in one axial direction, and arranged between the central pillar ( 11 ) and the engaging member ( 12 ); a wedge member ( 15 ) inserted into the wedge space (W), and configured to be axially movable therein; and said wedge member ( 15 ) configured to be axially movable by a driving device ( 31 ).