| 摘要 |
PROBLEM TO BE SOLVED: To simplify a structure of a connecting part, to reduce manufacturing cost, and to reduce the entire price. SOLUTION: A direction of a torque provided from first and second torsion bars 1 and 2 for a joint device 30 is set to be a direction of separating first and second facing surfaces 26a and 27a and pressing first and second joint parts 26 and 27 onto a pin 29, thereby applying compressing load to the pin 29.
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