| 摘要 |
PROBLEM TO BE SOLVED: To provide a desired pressing capacity by a servo motor of relatively small capacity and a drive part of compact structure, and to improve the forming property. SOLUTION: A knuckle driving means 10 having a ball screw device is driven by the servo motor 7, a knuckle mechanism 17 is driven by the knuckle driving means 10, and a slide 5 is elevated/lowered by the bending and stretching motion of the knuckle mechanism 17 via a plunger 6.
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