| 摘要 |
<p>An anchor bolt for architecture is composed of a screw nut (1), a screw (2) and at least two expansion elements (3). The screw includes a threaded section (21) and a bolt head (23). The screw nut is screwed at the threaded section. Each expansion element is inserted at the outside of the threaded section. The same ends of all expansion elements form a plurality of expansion pieces (31), and the other ends of the elements form wedged surfaces (32) to meet the adjacent expansion pieces. The screw nut or the screw forms wedged surface to meet the pieces. The bolt according to the invention has good self-locked ability, stability and security.</p> |
