| 摘要 |
PROBLEM TO BE SOLVED: To mount a device in the back of a double ceiling without driving anchor bolts by providing an angle extending between ceiling frames and attaching the device to be mounted on the back of the ceiling to this angle. SOLUTION: The length of an angle 10 is not smaller than at least the space between ceiling frames 3 and the width thereof is obtained by arranging two flat plates in parallel and connecting them together with a connecting plate 13 so as to have stability. Engaging parts 12 are formed at both ends of the angle 10 and the engaging parts 12 are engaged with the ceiling frames 3 so that they are not moved. A device 15 is fixed to the angle 10 by using bolts 18. As a result, noise and vibration are not generated during work, and the device 15 can be effectively moved and increased. The change of a floor plan can be easily met only by moving entirely the angle 10 and a risky work at a high position using a stepladder or the like cm be avoided. |
