| 摘要 |
PURPOSE:To improve the fixity of retainer legs to the ceiling materials, remove the deviation of angles of retainer legs to their retainer bases and protect the surface expansion of the ceiling materials by giving the bending directions and the angles of the retainer legs to their retainer bases approximately definite angles of 10+ or -2 deg.. CONSTITUTION:A concave port 4A is formed in a retainer A in order to fit it to a driver suitably and the retainer A is fitted to the driver 4 which provides a magnet 5 in the center of the concave 4A. The retainer A is fixed magnetically by the magnet 5. The depth of the concave part 4A of the driver 4 is approximately equal to the plate thickness of the base part 1 of the retainer A. The driver 4 provided with the retainer A is pushed on a given location of the ceiling material 3 mounted on the base part 6. Therefore if the retainer A is driven into the ceiling material 3 the edges of the legs 2 penetrate into the ceiling material 3 and are opened outward approximately at the given angle. |
