PURPOSE: To obtain a fixing adapter which can be used for both the RC and PC methods by providing plastic elastic pieces which can be fixed through one action to the external surface of the central part of the base of an electric wiring box buried in a concrete wall.
CONSTITUTION: At the time of insetting the paired plastic electric pieces and insertion guides 6 of the main body of a fixing adapter 3 into a knockout section 2 provided in the bottom wall of an electric wiring box 1, a hook section 5 is retreated by the elasticity of the pieces 4 and pushed in the knockout section 2 and, when the insertion is completed, the hook section 5 is restored to the original position by the elasticity of the pieces 4 and expanded from the periphery of the opening of the knockout section 2 so as to prevent the coming out of the pieces 4 and guides 6 from the section 2. When the adapter 3 is used for the PC method, the electric wiring box is fixed to a coupling member for fitting upper surface with a check bolt 9 and, when the RC method is used, the box is fixed to a concrete frame work 8 composed of a concrete panel, etc., with the check bolt 9 through the knockout section 2 of the box 1. Therefore, a fixing adapter 3 which can be used for both the RC and PC methods can be obtained.
IWANAMI NOBORU
ODAGIRI MAKOTO
TOYO KAGAKU SANGYO KK