POSITIONING MECHANISM

PROBLEM TO BE SOLVED: To provide a positioning mechanism which can make the center of an assembled component coincident with a standard center with good efficiency.SOLUTION: A positioning mechanism comprises: a computer; a first support fulcrum; a second support fulcrum set on the top face of the first support fulcrum; a third support fulcrum set on the top face of the second support fulcrum; a positioning part fixed onto the top face of the third support fulcrum; a first drive unit fixed onto the first support fulcrum; a second drive unit fixed onto the second support fulcrum; a third drive unit and a fourth drive unit respectively fixed onto the third support fulcrum; a first calibration block; and a second calibration block. The first calibration block and the second calibration are respectively provided with pressure sensors. The first calibration block and the second calibration block are respectively driven by the third drive unit and the fourth drive unit and moved to a position where both the calibration are adjacent to two side faces of standard blocks set by the positioning part or assembled components.