| 摘要 |
PURPOSE: An anchor bolt is provided to concentrate the impact of a hammer on a striking protrusion formed on the anchor bolt to be separated from screw threads. CONSTITUTION: An anchor bolt comprises an inner member(110) and an outer member(120). The inner member has a connection part(111) and an extension part(113). The connection part has a uniform diameter. The extension part is extended from the connection part and has an inclined plane(112). The outer member has a receiving groove(121) in which the connection part is inserted. When the connection part is inserted into the receiving groove, the receiving groove is expanded along the inclined plane of the extension unit.
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