Patent ID: 7165763

Claim:
A positioning apparatus, wherein a reference member (R) is provided with a support surface (S) for supporting a movable member (M) and a central pillar ( 21 ) projected from the support surface (S) toward a leading end, a positioning hole ( 12 ) is opened in a surface (T) to be supported of the movable member (M), a shuttle member ( 23 ), which is diametrically expandable and contractible, is arranged between the central pillar ( 21 ) and the positioning hole ( 12 ), the shuttle member ( 23 ) is supported on one of the central pillar ( 21 ) and the positioning hole ( 12 ) axially movably, and the shuttle member ( 23 ) is adapted to make a tapering engagement indirectly with the other of the central pillar ( 21 ) and the positioning hole ( 12 ) via a tapered cylinder ( 26 ), which narrows toward the leading end, the tapered cylinder ( 26 ) is attached to the shuttle member ( 23 ), the shuttle member ( 23 ) is adapted to be pushed in such a direction as to tighten the tapering engagement by means of an advancing means ( 24 ).