| 摘要 |
PROBLEM TO BE SOLVED: To provide a drilling machine, which ensures sediment flowability at a chamber central part and has downsized rotation driving means to drive rotation of a central part cutter head.SOLUTION: A shield drilling machine comprises: a central part cutter head 3A and a periphery cutter head 3B; an annular first cutter drum 20, which is rotatably mounted on a partition wall 8 that partitions a chamber 7; a first connection member 21, which connects the periphery cutter head 3B to the first cutter drum 20; an annular second cutter drum 23, which is rotatably mounted on the first cutter drum 20; a second connection member 24, which connects the central part cutter head 3A to the second cutter drum 23; first rotation driving means 22 to drive rotation of the first cutter drum 20 to a drilling machine body 2; and second rotation driving means 25 which is mounted on the first cutter drum 20 to drive rotation of the second cutter drum 23 to the first cutter drum 20.SELECTED DRAWING: Figure 2 |
