| 摘要 |
PROBLEM TO BE SOLVED: To prevent that the life of a motor is shortened in a presswork device using drive means constituted by a chain and the motor.SOLUTION: First drive means 205 for raising and lowering an upper mold 200b includes a pair of chains 205a and a motor 205b for driving the pair of chains 205a, the pair of chains 205a are engaged with each other to form a rod-like part 205d extending vertically, the upper edge of the rod-like part 205d is fitted to the upper mold 200b, and the upper mold 200b is raised and lowered through telescopic motion of the rod-like part 205d by driving the pair of chains 205a by the motor 205b. A chain-side bracket 205e mounted at the upper edge of the rod-like part 205d of the pair of chains 205a is coupled with a ram-side bracket 202b mounted at the upper mold 200b while allowing vertical separation. |
