| 摘要 |
In this excavation tool, an embedding hole (8) is provided piercing the tip of a tool main body (1) that rotates around an axis line (O) and progresses towards the tip in the axis line (O) direction, an excavation tip (5A) wherein a cylindrically-contoured embedding section (6) and a blade tip section (7) are integrally formed is inserted into the embedding hole (8) causing the embedding section (6) to be inserted into the embedding hole (8) and the blade tip section (7) to protrude from the embedding hole (8), and the excavation tip (5A) is attached in a manner so as to be able to rotate around the center line (C) of the embedding section (6) during excavation and in a manner so as to be prevented from dislocating towards the tip in the direction of the center line (C). |
