after the construction anchor, post-construction anchor construction methods and post-construction anchor system of

摘要

Pull strength is to provide a construction anchor or the like after the can prevent from decreasing with time. A construction anchor 10 after being anchored in an anchor hole 1 formed with the enlarged diameter portion 4 at a predetermined depth position of the lower hole portion 3, a cylindrical tubular body 11, the front end side of the cylindrical body 11 an expanding portion 12 formed integrally with the cone portion 13 which expanded the expanding portion 12, provided with, expanding portion 12 includes a main expanding portion 21 corresponding to the enlarged diameter portion 4, the main expansion the base end side expanded portion 22 continuous with the base end parts 21, the distal end side expanded portion 23 continuous to the front end side of the main expanding portion 21, the base end side expanded portion 22 and the main expansion portion 21 a proximal end side thin-walled portion 24 which is interposed between, and I have, a distal end side thin part 25 which is interposed between the main expanding portion 21 and the distal end side expanded portion 23.