| 摘要 |
A drill, a wall protecting member for drilling and a drilling method are provided to prevent the damage of an opened periphery unit due to the front unit of a protecting member by attaching a central line of the width direction of a tip applied to the shaft center of a drill body in an eccentric condition. A drill, a wall protecting member for drilling and a drilling method comprise a drill body(11) and a tip(12). The tip with high hardness is attached to the front end of the drill body. The width dimension of the tip is larger than the diameter dimension of the drill body. The central line is attached in an eccentric condition applied to the shaft center of the drill body. Therefore, the fixing force of an anchor is enhanced. |
