| 摘要 |
PURPOSE: To improve adjustment and maintenance by varying a height of a main luminous flux when a projection unit is mounted on a frame base and connecting and supporting the projection unit and a screen unit with a link so that their distance is increased or reduced. CONSTITUTION: A frame base 5 is made up of a vertical frame 22, a side frame 23, a horizontal frame 24, and a base frame 7. A projection unit 3 is removably fixed on the frame 23 via a roller 40 by a bolt 39. The frame 23 is fixed to a threaded hole 25 of the frame 22 whose height is decided so that a main luminous flux of the projection unit 3 is aligned with the center of the screen unit 2. A rear part of a link 21 is connected to a lower part of the frame 7 and the frame 10 is fitted removably to the link 21. A removable reinforcement frame is connected to an upper part of the screen unit 2 and an upper part of the frame 5 with a hinge 13. Thus, the lateral distance between the projection unit 3 and the screen unit 2 is changed by turning the hinge 15. |
