| 摘要 |
PROBLEM TO BE SOLVED: To facilitate a work at an accurate angle in the vertical direction and in the horizontal direction, and heighten the work accuracy by providing a handle main body with a level gauge formed by enclosing a liquid and bubbles in a transparent container. SOLUTION: A motor-driven drill main body is fitted with a handle having a level gauge. In boring, with the drill tip adjusted to an arbitrary boring angle, it abuts on a material to be bored and it is held as it is with the hand. Secondly, a butterfly screw is loosened and adjusted so that the bubbles 4 of the level gauge 5 come to the center of a measure line, and the butterfly screw is fastened and fixed. In boring, an electric drill part and a handle with the level gauge are held by both hands to pull a switch, and while it is confirmed that the bubbles 4 are in the center of the measure line, looking at the level gauge 5, boring work is performed, aiming at it. Thus, stable work with high accuracy can be performed.
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