| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a block chamber mechanism used for a guiding machine which can be easily recovered even in an underwater part, thereby dispensing the construction of an arrival shaft and reducing construction cost. <P>SOLUTION: A block chamber mechanism interposed between the rear end of a guiding machine 1 and a casing 2 is provided with a separable front chamber 20A and a separable rear chamber 20B in front and back sides in the propulsion direction, respectively. The front chamber 20A and the rear chamber 20B are provided with partition walls 22A, 22B, respectively, the partition walls 22A, 22B being arranged with a space therebetween, and a water injection hole is provided which allows water to be injected into a chamber R blocked by a pair of the partition walls 22A, 22B. <P>COPYRIGHT: (C)2013,JPO&INPIT |
