Anti-vibration tool and seismic hanger fitting with this anti-rotation tool

摘要

PROBLEM TO BE SOLVED: To prevent a metal hanger from coming off from a deck plate, even if the metal hanger is pulled in a longitudinal direction due to earthquake.SOLUTION: A rotation preventing tool is attached to a metal hanger. The rotation preventing tool comprises: a pair of plate skirt parts arranged with a predetermined interval therebetween in a manner of bilateral symmetry on approximately same plane surface; a connecting part connecting the pair of skirt parts; and a guide part holding the metal hanger between the pair of skirt parts on the approximately same plane surface. Each of the skirt parts comprises an approximately rectangular corner part. A facing side of two adjacent sides making the corner part of one of the skirt parts and a facing side of two adjacent sides making the corner part of the other skirt part face in parallel to each other with an approximately same interval as a width of the metal hanger. A fitting side of one of the adjacent sides making the corner part of one of the skirt parts and a fitting side of one of the adjacent sides making the corner part of the other skirt part are aligned on the approximately same straight line.