| 摘要 |
PROBLEM TO BE SOLVED: To easily crush a reinforced concrete pipe. SOLUTION: This cutter head, for crushing an existing concrete pipe, includes a cutter bit 9, which is installed on a cutter head 2 taking approximately the same radial position as the vertical reinforcement of the concrete pipe, and a roller cutter 5, which is installed on the cutter head 2 taking approximately the same radial position as the horizontal reinforcement of the concrete pipe, and which has a rotation axis in approximately the radial direction of the cutter head 2 and has cutting teeth that cross the rotating direction of the cutter head 2. |
