| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a boring tool capable of reducing a maintenance work. <P>SOLUTION: When a material is left in a blade (2) after boring a hole (H) in a boring surface (S) by continuing movement of a movement shaft (4) and the blade (2) in a first direction (A1) while rotating the movement shaft (4) and the blade (2), a rod-shaped element (40) is in a projected state in a second direction (A2) from the movement shaft (4) by the material left in the blade (2). When the movement shaft (4) and the blade (2) are moved in the second direction (A2), a second end (36b) of the rod-shaped element (40) abuts on a stopper section (46), the rod-shaped element (40) is moved in the first direction (A1) in relation to the movement shaft (4) and the blade (2) and the material left in the blade (2) is pushed out from the blade (2). Cutting liquid supplied from a supply hole (48) is supplied to the blade (2) through gaps (G2, G3) between the rod-shaped element (40) and the movement shaft (4) and through a gap between a rod-shaped element (38) and the blade (2). <P>COPYRIGHT: (C)2013,JPO&INPIT |
