| 摘要 |
PROBLEM TO BE SOLVED: To provide a fixing nut for a covering material, which streamlines the installation work of an air layer, wire gauze, heat-insulating sound-insulating material, and exterior plate which cover the periphery of a duct, tank or the like, and reduces fabrication costs.SOLUTION: As for the fixing nut, a supporting bolt 3 is rotated and screwed into a nut welded to the surface of the body of a duct, tank or the like, and a wire gauze fixing nut 5 is rotated and attached to the supporting bolt with room for the air layer. The wire gauze 4 is put on the upper part of the nut, and sandwiched and fixed by rotating another wire gauze fixing nut. While heat-insulating sound-insulating material is put on the upper part of the wire gauze, it is penetrated by the supporting bolt and fixed by rotating an exterior fixing nut at the front end section of the projecting supporting bolt. The exterior plate is put on the upper part of the exterior fixing nut, and is fixed by making a drill screw penetrate the exterior plate and exterior fixing nut. |
