| 摘要 |
PROBLEM TO BE SOLVED: To provide a lightweight ceiling panel, which is excellent in appearance and easily installed and cleaned because of its smooth surface free of any projection such as a machine screw, and structure of an inspection port and an inspection port lid suitable for this kind of ceiling panel. SOLUTION: An inspection port, around which a rising wall 7 is arranged upward (toward a ceiling panel back face) from the opening of the inspection port, and an ashtray-type inspection port lid 3 matched with the shape of the inspection port are combined together, and the inspection port lid 3 is dropped into the inspection port from the upper side so as to close the port. In the rising wall 7, a fitting recess part 10 is arranged, while a projection part 8 to be fitted in the recess part 10 is arranged on the side face of the inspection port lid 3, and the projection part 8 is fitted in the recess part 10. |
