| 摘要 |
PROBLEM TO BE SOLVED: To increase the breaking strength of a joint pin without using a special pin hole form. SOLUTION: Many link plates 2 each having a pair of pin holes 10 are connected together by locker joints (connecting pin) 20 including joint pins 15 and locker pins 16 inserted into the pin holes 10. At both ends of the joint pin 15, guide links are provided. In this cage, the form in section of the joint pin 15 is larger than that of the locker pin 16.
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