| 摘要 |
PROBLEM TO BE SOLVED: To cope with high stress acting in crane work even if thinning a plate thickness of an upper face plate (for the weight reduction and cost reduction of a material) in an outrigger reinforcing member.SOLUTION: In an outrigger reinforcing structure of a crane truck in which an outrigger reinforcing member 3 is interposed while straddling an upper face of an outer cylinder 21 of an outrigger 2 arranged at a lower part of a vehicle body frame 1 and the vehicle body frame 1, a reinforcing plate 4 having a prescribed small area and a thick plate thickness is welded to a position which straddles a prescribed range portion on which high stress acts at crane work at an upper face plate 31 of the outrigger reinforcing member 3 and a side face part 11a of an upper face plate 11 of the vehicle body frame 1 in a state that an area of a part of the reinforcing plate 4 is superimposed on the upper face plate 31 of the outrigger reinforcing member 3 in a plane view, and a plate thickness of the entire upper face plate 31 of the outrigger reinforcing member 3 is thinned more than that at strength which copes with the high stress at the crane work, thus achieving the weight reduction and cost reduction of a material while coping with the high stress.SELECTED DRAWING: Figure 2 |
