| 摘要 |
PURPOSE:To enhance the workability for fixing an insert to a steel deck by providing ring-shaped saw teeth and a tapered external thread on the lower end surface of the insert body having a through hole, and by integrally rotating the insert body and a drill. CONSTITUTION:When a drill is inserted into the through hole 1 of an insert body 2 and is turned, the drill D is lowered while piercing through a steel deck P, and the insert body 2 whose whirl-stop 9 of a hexagonal hole has been fitted in the nut-shaped engaging part 12 of the drill D is turned integrally with the drill. In this case, the prepared hole 13 for fixing the insert is formed by the saw-teeth 5 on the lower end surface of the insert body 2, and at the same time, the tapered external thread 6 formed on the outer circumferential surface forms a thread on the prepared hole 13 while being screwed in, and the insert A is fixed to the steel deck P. Thus, the workability for fixing the insert can be significantly enhanced. |
