| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ceiling backing structure prevented from the deviation of a hanger caused by loosening of mounting nuts even if the mounting nuts continue to receive various vibrations when fixing the hanger for supporting a ceiling joist receiver, using the mounting nuts screwed to a mounting bolt. <P>SOLUTION: The hanger 12 constituting the ceiling backing structure 10 is fixed into a predetermined position by inserting the mounting bolt 11 hanging from a skeleton ceiling part, through a hole in a mounting plate 17 and tightening first and second nuts 19, 20 screwed to the mounting bolt 11, to a lower clamping surface 17a and an upper clamping surface 17b of the mounting plate 17. These nuts are prevented from loosening by nut locking means 22, 24, 25. The ceiling joist receiver 13 is supported by the hanger 12, and ceiling joists 14 are connected to the ceiling joist receiver. <P>COPYRIGHT: (C)2011,JPO&INPIT |
