| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a double ceiling structure of a building which is excellent in sound-insulating performance to a heavyweight floor impact sound, and has a narrow space in the ceiling. <P>SOLUTION: This double ceiling structure includes: an approximately C-shaped cross section ceiling joist retainer 10 which is fixed to a ceiling slab 2; an adjusting plate 6 which is engaged with both engaging plates 34 and 34 of the ceiling joist retainer, and has an adjusting bolt 4 engaged in the center; and a ceiling joist receiving implement 8 which is engaged to both bent plates 38 and 38 of an approximately C-shaped cross section ceiling joist 12, and has a support body 30 fixed to a central portion of a base plate 27. The ceiling joist 12 is arranged below the ceiling joist retainer 10 in a direction crossing the ceiling joist retainer while the ceiling joist receiving implement 8 is positioned below the adjusting bolt 4. The adjusting bolt 4 is screwed to the upper portion of the supporting body 30 by rotating the adjusting bolt 4 through an operation hole 13 formed at the lower plate 36 of the ceiling joist by means of a tool, and screwed to the supporting body 30. Accordingly, the ceiling joist 12 is attached to the ceiling joist retainer 10 by connecting the ceiling joist receiving implement 8 and the adjusting plate 6 to each other, and then a ceiling board 14 is stuck on the ceiling joist. <P>COPYRIGHT: (C)2010,JPO&INPIT |
