AFTER APPLICATION ANCHOR BOLT

摘要

An after application anchor bolt, which is fitted especially on an existing concrete floor. The after application anchor bolt is provided with a sleeve which is externally engaged with a bolt main body and a fixing member screwed to the bolt of the bolt main body closer at a bolt main body tip side than the sleeve. The fixing member consists of a female screw part and an expansion part. The expansion part is separated into four expansion pieces by notching. The expansion pieces are arranged on a bolt main body head-side and are slightly opened toward a head direction. A tip of the sleeve is set to be a taper face. When the anchor bolt is inserted into a lower hole (installation hole) formed in the concrete floor and the bolt main body is rotated, the fixing member screwed to the bolt main body moves to a sleeve-side and the expansion part runs on to the taper face and is pushed open. Consequently, the respective pieces of the expansion part buckle and are fastened to inner peripheral faces of the installation hole. Then, they are fixed by strong force.