| 摘要 |
An anchor bolt is provided to improve use convenience and stability by preventing the coupled anchor bolt from being separated due to external force. An anchor bolt(400) includes a sleeve(100), an expansion nut(200), and a tie bolt(300). The sleeve has an insertion end(100a) and an exposed end(100b). The insertion end is inserted into a coupling groove and has slits(140) cut at a predetermined angle. The exposed end is exposed out of the coupling groove and has a male thread(120) on the outer peripheral surface. The expansion nut has a female thread on the inner peripheral surface, and the outer peripheral surface thereof is inclined. A small diameter end of the expansion unit is partially inserted into the insertion end of the sleeve so that the insertion end of the sleeve is expanded. The tie bolt has a head with a smaller diameter than the inner diameter of a nut coupled with the male thread formed on the exposed end of the sleeve and a thread part with a smaller length than the sleeve so that an end of the thread part is coupled with the expansion nut in a state the thread part is inserted into a through hole of the sleeve.
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