| 摘要 |
PURPOSE: To reliably tension/fix a tool holder and a tool head by a simple method by providing different pitches for first/second screws of a fixing pin, and constituting so as to mutually tension the tool holder and the tool head in the shaft direction at screw fastening time of the fixing pin. CONSTITUTION: A first screw 7a and a second screw 8a or a first female screw 10a and a second female screw 10b have different screw pitches by rotation of a fastening screw 10, and since the first screw 7a is larger than the pitch of the second screw 8a, a spiral head 2 and a spiral body 1 are relatively approached/moved. Both 1, 2 are fixed to the relative position by mutually tensioning the spiral head 2 and the spiral body 1 after the ring segment part 1a contacts with the support surface 2b. In that case, both 1, 2 are mutually supported in the shaft direction by the ring segment part 1a or the support surface 2b. Centering can be performed in a position of a pin part 10c-combined state by fixing a seal member 11 to the position by the tensional force. |
