| 摘要 |
PROBLEM TO BE SOLVED: To provide a ceiling suspension device for improving reliability of an installed state being reliably installed even when not visually viewing the ceiling suspension device, improving safety of installation working at the time, and securing safety after installation.SOLUTION: The ceiling suspension device 1 suspending a projector 5 includes: a first substrate 10 fixed on a ceiling surface 800 and having a pair of guide parts 104 and a pair of a first holding parts 105 formed on the ends of the guide parts 104; and a second substrate 20 hooking and sliding the vicinity of both ends for the guide parts 104, having a first holding material 50 rotatably held on the first holding part 105 and holding the projector 5. |
