| 摘要 |
PURPOSE:To install a stay anchor without producing hammering vibration, by a method wherein, after an anchor body is inserted into an auger hole, circular resistance discs are cut through the peripheral wall of the auger hole with the aid of a collecting disc which is raised through rotation of a handle. CONSTITUTION:In order to install a stay anchor adapted to prevent fall-down of a strut, an anchor body is inserted into an auger hole 22 in a state in which resistance discs 1 are closed, and a collecting disc 5 is positioned above a hole bottom. By rotating a handle 21 and raising a lift rod 8 through a screw rod 17, the collecting disc 5 is raised, and the resistance discs 1 are pushed by the collecting disc 5 to cut through the peripheral wall of the auger hole 22 with the aid of a roller 16 serving as a guide. This enables the stay anchor to be installed without producing hammering vibration and noise. |
