| 摘要 |
PURPOSE:To sharply reduce construction labor and hence improve construction efficiency by providing a fixed member fixedly mounted on a fixed structure disposed in a ceiling, a suspension bolt suspended from the fixed member, and a frame member including a peripheral edge thereof as a reference frame for defining the opening edge of a ceiling board. CONSTITUTION:In a driver work step prior to sticking work of a ceiling board 16, a vertical piece part 1b of a fixed member 1 is fixedly mounted on a root part 13 using a fixing tool 17. A piece 10a of a positioning lever 10 disposed at the lower end edge of a frame member 4 reaches a location as the lower surface of the ceiling board 16, and the peripheral edge of the frame member 4 is disposed at a reference position for formation of an opening 18 in the ceiling board 16. After the work of the driver, sticking of the ceiling board 16 is performed, and the facing adjustment of the ceiling surface is performed using the lower end edge of the frame member 4, i.e., the piece 10a of the positioning lever 10, supposing the lower surface of a ceiling unit 11. Simultaneously, the opening 18 is formed in the ceiling board 16 taking as a reference the peripheral edge of the frame member 4, and is fitted over the peripheral edge of the one piece 10a of the positioning lever 10 of the frame member 4 and fitted to a frame body 9. |
