| 摘要 |
PROBLEM TO BE SOLVED: To attain weight reduction in a working machine reducing driving reaction force generated when a working part moves in a Z-axis direction.SOLUTION: A driving part 10 such as an electric motor is movably supported in a Z-axis direction by a fixing member 3. A working part 6 is moved in the Z-axis direction by driving of the driving part 10, and the driving part 10 is moved in a direction opposite to the working part 6 by a reverse movement part R1. The reverse movement part R1 includes a second screw shaft 30b composed of a lead shorter than a lead of a first screw shaft 30a with which the working part 6 is screwed and a second nut member 33 which is fixed to the fixing member 3 and is screwed with the second screw shaft 30b, for instance. |
