| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a pin retaining structure for preventing a retractable pin from coming off when it is inserted to an inserted member of a work machine, and capable of easily attaching and detaching a ring pin.SOLUTION: A retractable pin 16 is provided with a fixing hole 19 formed radially penetrated at one end portion projecting from a reference face 12S of an inserted member in a state of being fitted to a pin hole. A ring pin 20 having a base portion 21, a pin portion 22 extended from the base portion 21, and a ring portion 23 journaled to the base portion 21 at an end portion, is inserted to the fixing hole 19. The ring portion 23 is rotatable centering a rotating shaft R between a retaining attitude close to the reference face 12S to inhibit coming-off of the ring pin 20 from the fixing hole 19, and a coming-off attitude separating from the reference face to permit coming-off of the ring pin 20. The ring portion 23 has a projection 25 projecting to form a clearance gap G1 with the reference face 12S in the retaining attitude.</p> |
