| 摘要 |
PROBLEM TO BE SOLVED: To enable an engaging member for preventing a hook member from being detached when stored to be firmly supported.SOLUTION: A connection link 8 connected with an arm 3 and a swing link 9 connected with a work tool 5 are respectively connected to the tip of a work tool cylinder 6. A crane tool 11 having a hook member 10 is pivoted on the swing link 9 such that it is freely changeable between a use attitude and a storage attitude. A holding pin 12 fitting the hook member 10 when stored and anti-loosening means 13 for preventing the hook member 10 from being detached from the holding pin 12 are provided in the swing link 9. The anti-loosening means 13 includes: an engaging member 15 pivoted on a support shaft 14 provided in the swing link 9 and overlapping the hook member 10 fitted to the holding pin 12 by turning; and an engaging part 12A provided in the holding pin 12 and restricting movement of a hook overlapping position in the hook detaching direction of the engaging member 15. |
