| 摘要 |
PROBLEM TO BE SOLVED: To completely prevent leakage of sludge and sewage from a mating part of an opening surface of left-right buckets. SOLUTION: In this clamshell bucket, the left bucket 4 and the right bucket 5 are rotatably arranged around support shafts 6 and 7 of a lower end part of left-right arms 2 and 3 having the upper end journaled to a machine body 1, and the mutual inside edges of the opening surface of the left-right buckets 4 and 5 are joined by a pivot shaft 8, and sediment of the sea bottom is dredged by opening-closing and moving the left-right buckets 4 and 5 by liftably operating its pivot shaft 8 by an opening-closing wire 11 of a crane. A part except for the opening surface of the left-right buckets 4 and 5 is formed into a sealed structure. Sealing packing 12 is installed in the mating part of the opening surface of the left-right buckets 4 and 5, and an air bleeding port 13 and an air bleeding door 14 for opening and closing this port are arranged on a back face of the left-right buckets 4 and 5. The mating part of its opening surface is made watertight when closing the left-right buckets 4 and 5 by grinding and processing the mating part of the opening surface of the left-right buckets 4 and 5. COPYRIGHT: (C)2006,JPO&NCIPI
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