| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a dust-collecting adaptor easily mounted on a drill. SOLUTION: A corresponding annular engaging part 68 engaging with an annular engaging part 66 provided on the outer peripheral surface of a shank part 44, to prevent the movement in an axial direction of a dust-collecting adaptor 40, is provided in the inner surface. A portion of the adaptor 40 provided with the engaging part 68 is made elastically displaceable in a radius direction, to make the engaging part 68 displaceable from the radius directional inner side position where the engaging part 68 is engaging with the engaging part 66 to a radius directional outer side position where that engagement is released, and the engaging parts 68 and 66 are contacting on a tilted surface where radius directional outward force, applied to the engaging part 68 from the engaging part 66, is generated when predetermined force or more in the axial direction is applied to the adaptor 40.</p> |
