| 摘要 |
PROBLEM TO BE SOLVED: To reduce pollution diffusion to a proximity water area by outflowing polluted water even when it is not possible to perfectly close between shells of a grab bucket for dredging. ! SOLUTION: A grab bucket for dredging includes a pair of shells rotating in directions opposite to each other around horizontal rotation central axes respectively. Each shell has a shell bottom plate and both shell side plates integrated to both sides of the shell bottom plate. An excavation opening is configured by tip edges of the shell bottom plates and tip edges of both the shell side plates. A closing state is formed by joining excavation openings of both the shells to face each other. A water leakage guide for changing the flowing direction of water flow leaking from a gap between the tip edges of the shell side plates to downward is provided at a position present on the outside of both the shells and astride across the tip edges of both the shell side plates which have come close to each other in a st |
