WORK PALLET POSITIONING AND FIXING DEVICE

摘要

A positioning and fixing device (2) positions via a ring member (4) a work pallet (1) in the vertical and horizontal directions relative to a base member (6) and restrains the rotation of the pallet on the vertical axis. The base member (6) has a Z-reference surface (10) capable of receiving a lower end reference surface (9) of the ring member (4) and positioning the pallet in the vertical direction, and the base member (6) also has a tapered engaging male section (11) formed, in a horizontal cross-section, in a regular polygon having outwardly protruding circular arc corners (11a) and sides (11b) and having an upwardly reduced diameter. The ring member (4) has a tapered engaging female section (13) capable of engaging with the tapered engaging male section (11) so that the lower end reference surface is in contact with the Z-reference surface. The positioning and fixing device (2) has a clamp mechanism (18) for fixing the ring member (4) to the base member (6). The sides of at least either the tapered engaging female section or the tapered engaging male section are adapted to elastically deform and engage in a close contact manner with the other.