| 摘要 |
<p>A fixing device which can be anchored in a bore 7 prepared in in situ concrete comprises a threaded bolt (1,2,3) carrying a cylindrical separator (4), an expandible sleeve (5) and a conical nut (6). The separator (4) presents a peripheral cylidrical rebate (11) to a number of resilient longitudinal blades (12) formed on the opposing end of the sleeve (5) and defined by longitudinal grooves or slots in the sleeve and forming a conical structure opening outwardly from the sleeve. The rebate is able to receive these blades during introduction of the threaded member carrying the anchoring assembly into a bore (7), the blades serving by their own elasticity to fix the anchoring assembly within the bore, hindering turning of the sleeve and adapting to irregularities in the wall of the bore. The nut (6) is prevented from rotating by its lugs (17) which engage in the losts (14) in the expandible sleeve (5). <IMAGE></p> |
