| 摘要 |
PROBLEM TO BE SOLVED: To provide a passage opening/closing device which makes a length-direction dimension of a passage opening/closing device body small and which keeps a maintenance cost low by simplifying an expansion mechanism.SOLUTION: An opening/closing unit 51 according to the present embodiment includes: a rotating shaft 3 which is rotated by an opening/closing driving mechanism not shown in the figure; a first door member 4 which is fixed to the rotating shaft 3 and which makes an opening/closing motion along with the rotation of the rotating shaft 3; an operative mechanism 52 which is supported by the first door member 4 and which operates by being subjected to a rotational force of the rotating shaft 3; and a second door member 5 which advances/recedes in a direction parallel to the first door member 4 by the operation of the operative mechanism 52. |
