| 摘要 |
PROBLEM TO BE SOLVED: To prevent loss of a hook storage pin, to facilitate hook storage operation by canceling position adjustment operation of the pin in storage of the hook and to ensure removal prevention function of the hook storage pin. SOLUTION: A hook 15 for performing hanging work is turnably mounted to a distal end of a working attachment in such a state that it is stored between both link plates 12a, 12a of a bucket link 12 at non-use. It is constituted such that it is engaged/retained to the hook storage pin 22 provided on pin holes 17, 17 of the both link plates 12a, 12a slidably in a removal/insertion direction at a storage position. Rotation around a pin axis center of the hook storage pin 22 is suppressed by a stopper 26 mounted to the one link plate 12a and a flat surface 23 and the hook storage pin 22 is stroke-restricted in the half removal state by the stopper 26 and a removal stopper surface 24 in removal of the pin. COPYRIGHT: (C)2007,JPO&INPIT
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