POSITIONING DEVICE AND CLAMPING SYSTEM WITH THE DEVICE

摘要

A positioning device, wherein a plug member (12) inserted into a positioning hole (5) formed in a second block (2) is projected from a first block. Two slide portions (61, 61) opposed to each other on both sides of the plug member (12) are disposed on the plug member (12) in the state of being movable in a first radial direction (D1) generally orthogonal to the opposed direction of the slide portions. A radially expandable and contractible annular pressing member (15) is disposed on the outer peripheries of the slide portions (61, 61). The slide portions (61, 61) radially expand the pressing member (15) in a second radial direction (D2), i.e., in the opposed direction by a drive means to press the pressing member against the peripheral surface of the positioning hole (5) so as to move the slide portions (61, 61) in the first radial direction (D1) relative to the plug member (12).