| 摘要 |
PROBLEM TO BE SOLVED: To provide a scraping device for dredging capable of carrying out scraping in both back and forth movements in the same condition, carrying out dredging with no scraping leftovers in a sedimentary layer, and improving efficiency of dredging work. SOLUTION: Scraping blades 11 rotatably incorporated in an interior of a box 10 with an opened bottom is formed so that a long blade plate 21 and a short blade plate 22 bifurcately bent toward mutually opposite sides in outer end parts to form scraping parts 20 are radially arranged with certain intervals in a circumferential direction, the scraping parts 20 of the long blade plate 21 and the short blade plate 22 are formed so that they are mutually facing scooping faces, and scraping can be carried out in the same condition even when the scraping blade 11 is rotated in either direction. COPYRIGHT: (C)2003,JPO
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