| 摘要 |
A mechanism for driving a movable body including a movable body reciprocatingly movable along guide members, a member for driving said movable body reciprocatingly, a wire for connecting the movable body with the driving member, a tension member arranged in a slack portion of the wire during the time of advancing movement of the movable body and elastic means for providing a strong or a weak tension force to the tension member, the weak tension force being applied to the tension member during advancing movement of the movable body and the strong tension force being applied to the tension member during returning movement of the movable body.
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