| 摘要 |
PURPOSE:To absorb positional shift caused through a load by providing a plurality of pins movable respectively in radially outward direction and axial direction through liquid pressure then engaging the pins in the grooves of jigs and securing the jigs. CONSTITUTION:Three cylinders 3 are burried in a disc body 2 while three cylinders 5 are burried between the cylinders 3 and pins A, B are arranged respectively in the cylinders 3 and 5 movably in radial direction and axial direction. When a jig 10 is fitted on the body 2 and pressure air is fed to the cylinder 3, the pin A is engaged with the circumferential groove 11 in the jig 10 thus securing the jig 10 in the axial direction. When the pin B is engaged with a conical groove 12, the jig 10 is positioned in the circumferential direction. Upon application of load onto the jig 10 in the circumferential direction, slip occurs between the pin B and the recess 12 and the jig 10 shifts in the direction of the load thus absorbing positional shaft. Upon elimination of load, the jig 10 is reset through automatic centering function between the pin B and the groove 12. |
