| 摘要 |
PROBLEM TO BE SOLVED: To provide a submerged excavating device and submerged excavating method capable of enhancing the rising speed of a bucket in the recovery of excavated earth and sand and preventing the falling of the periphery of an excavated area. SOLUTION: An excavating claw part 22 has a pressure transmitting means for transmitting the pressure above an excavating place to under the excavating place (a pipe 3, a communicating hole 24, grooves 26, 26E and 26F, etc.), and the pressure transmitting means (the pipe 3, the communicating hole 24, grooves 26, 26E and 26F, etc.) has an earth and sand intrusion preventing mechanism for preventing the intrusion of excavated earth and sand (check valves 24V and 26V) in the inner part. COPYRIGHT: (C)2004,JPO
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