| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a door device for differential pressure that can have its structure simplified on the whole and also can be easily assembled.SOLUTION: A door of a door device 1 installed at a boundary place between a low-pressure area and a high-pressure area comprises a first door 11 which is freely opened from and closed to a door frame 2 around a first hinge 13 fitted to one width-direction side end part, and a second door 12 which is fitted to the other width-directional end part of the first door 11 to be freely opened and closed around a second hinge 14. The first door 11 and second door 12 are juxtaposed in a width direction and arranged at an opening part 7 inside the door frame 2, and the second door 12 is provided with guide means 30,40 and freely rotates on the perpendicular axis of those guide means 30, 40, which are guided by the door frame 2 to freely move in the width direction.</p> |
