| 摘要 |
The present invention provides a shutter arranged so that, in order to open and close an opening formed in a partition dividing two spaces having a difference in pressure, the shutter moves along the high-pressure-side wall of the partition, wherein the shutter is able to be moved when opening the opening using a smaller force than in the prior art. A shutter (115) used for opening and closing an opening (117) formed in a partition (116) dividing two spaces (110), (140) having a difference in pressure, wherein the shutter (115) is provided with a first plate-form member (10) arranged to open and close the opening (117) by moving along the high-pressure side wall of the partition (116) and formed with a small opening (13) where the area is smaller than the opening (117) in a region corresponding to the opening (117), and a second plate-form member (20) arranged to open and close the small opening (13) by moving along the high-pressure side surface of the first member (10). |
