| 摘要 |
PROBLEM TO BE SOLVED: To provide a ceiling suspension device capable of easily and surely performing fine adjustments in a horizontal direction, a right-and-left direction and a vertical direction for a position (a posture) of a projector, and capable of reduction in thickness while attaching and detaching the projector in a saved space.SOLUTION: A ceiling suspension device 1 for a projector 7 includes: a first plate 10 fixed on a ceiling surface S; a second plate 20 which is installed on the ceiling surface S with the first plate 10, forms a first rotary shaft A1 having a rotary shaft in a vertical direction while being hooked on the first plate 10, and performs an adjustment in a horizontal direction centering the first rotary shaft A1; a third plate 30 which forms a second rotary shaft A2 having a rotary shaft in a back-and-forth direction while being hooked on the second plate 20, and performs an adjustment in a right-and-left direction centering the second rotary shaft A2; and a fourth plate 40 which fixes the projector 7, forms a third rotary shaft A3 having a rotary shaft in the right-and-left direction while being hooked on the third plate 30, and performs an adjustment in vertical direction centering the third rotary shaft A3. |
