| 摘要 |
<p>An aperture device has paper panel doors which are raised and lowered in operative cooperation with each other and which are arranged in the same plane when the paper panel doors are in a closed position, and the configuration therefor is simple. An aperture device (1) is provided with a frame body, and also with an upper paper panel door (30) and a lower paper panel door (50) which are provided within the frame body so as to be movable in the vertical direction in such a manner that the upper paper panel door (30) and the lower paper panel door (50) are caused by a wire to operatively cooperate with each other. Guide grooves (26d, 26e) for guiding the upper paper panel door and the lower paper panel door are provided in a vertical frame. At least one of the guide grooves is provided with a rectilinear section and a tilted section. The rectilinear section is provided so as to extend in the longitudinal direction of the vertical frame, and the tilted section communicates at one end thereof with one end of the rectilinear section. The other end of the tilted section extends in a tilted manner toward an end of the other guide groove. The upper paper panel door and the lower paper panel door have guides which can move in the guide grooves. The paper panel door which is guided by the guide grooves having the tilted sections is provided with members which can protrude a variable amount toward the guide grooves. When in a closed attitude, both the paper panel doors are arranged side by side within substantially the same plane.</p> |
