| 摘要 |
PROBLEM TO BE SOLVED: To secure high water-tightness without damaging workability in loading and unloading.SOLUTION: A dump truck carrier 1 is provided with a deck slab 4 and a peripheral wall 6 vertically provided on a peripheral edge of the deck slab, and is integrally formed of a rubber elastic body as a whole so as to be a liquid-tight structure. The peripheral wall 6 is structured such that a rearward peripheral wall part 6c extends in a peripheral direction when dumping-up and the rearward peripheral wall part 6c falls outward by self-weight of a carried object while holding continuity of sideward peripheral wall parts 6b, 6b by following outward fall of the rearward peripheral wall part 6c in the manner of falling inward while the sideward peripheral wall parts 6b, 6b being the neighboring part of the rearward peripheral wall part extend in a peripheral direction. After generated soil drops to be discharged by fall movement, the rearward peripheral wall part 6c is retreated and contracted in the peripheral direction, and the sideward peripheral wall parts 6b, 6b restore the rearward peripheral wall part 6c to an original vertical provided position by elastic restoring force to be returned to the original vertical state while retreating and contracting in the peripheral direction. |
