| 摘要 |
PURPOSE:To enable a job for free sectional excavation in a hard rock bed. CONSTITUTION:A cutter head 5 is installed in a freely self-propelled traveling part 2 free of rocking motion in the optional direction via parallel linkage 4, while a gripper part 12, locking the traveling part 2 at the time of excavation, is installed in this part 12. Then the cutter head 5 is rocked by the parallel linkage 4 as rotating a cutter head body 5a, thus a job for free sectional excavation in a hard rock bed is easily performed in this way. |
