| 摘要 |
PROBLEM TO BE SOLVED: To provide a lock structure for a joint coupling in which a desired bending range can be set, and it can be fixed in a state of a desired bending angle. SOLUTION: The lock structure for a joint coupling includes a plurality of circular discs for holding a shaft part of the joint coupling from both sides, and pressing it in both axial directions; and a pushing means to push the discs from both sides to the shaft part of the joint coupling to unrotatably push and fix the shaft part. The pushing means includes a shaft pin member penetrating through the shaft part of the joint coupling; a bearing member of the shaft pin member; and a lock lever rotatably installed to the shaft pin to axially move the shaft pin. For the lock lever, the bearing part for a fixing pin is formed as an eccentric bearing having different thickness depending on the angle. With the lock lever raised, lock is released, and with it fallen, the discs push the shaft part from both sides for locking. COPYRIGHT: (C)2011,JPO&INPIT
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