| 摘要 |
PURPOSE:To improve workability and workmanship of a ceiling board by forming fitting channels on its two sides fitting ridges on the other sides and adhering the ceiling board to a ceiling bed with an in stantaneous adhesive agent, and fitting the fitting ridges into the fitting channels of neighboring ceiling boards. CONSTITUTION:A ceiling board 1 forms fitting channels 2 on the full lengths of its two sides and fitting ridges 3 on those of the other two sides, so as to be fitted to its neighboring ceiling boards 1 side by side. Moreover, an about 1 deg. of inclination inclining the inner, the lower it becomes is provided to the end faces 6 of the back surface side of the ceiling board 1, and bonding channels 7 are formed on a finished surface of the ceiling board 1 when the edge parts of end faces 6, 6 are brought face to face with each other. The ceiling board 1 is adhered to a ceiling bed 4 with a monoliquid instantaneous adhering agent 5 while the fitting ridge 3 is fitted to the fitting channel 2 to connect ceiling boards 1, 1 together nearly flat. Therefore, it is possible to improve workability and workmanship. |
