| 摘要 |
PROBLEM TO BE SOLVED: To provide a method improving an operation environment for drilling and automatizing and performing an more accurate machining. SOLUTION: In a driving unit having: first and second rotors 1 and 2 respectively rotating around the same rotary shaft as a center; and a shaft brought into contact only with the second rotor 2, the second rotor 2 has a columnar hollow section 4 where its rotary shaft becomes the center, the shaft extends by penetrating the hollow section 4, and the first and second rotors 1 and 2 are linearly moved along the shaft with force corresponding to rotary force of the second rotor 2. COPYRIGHT: (C)2008,JPO&INPIT
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