| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a door device capable of definitely preventing the invasion by an invader while securing natural lighting and ventilation. SOLUTION: This door device comprises a door main body 31 provided for closing the entrance of a building, a locking mechanism 32 maintaining the door main body 31 in a closed state, and a door device 30 equipped with vertical slits 35 to 37 provided in the door main bodies 31 for communication between indoors and outdoors; the locking mechanism 32 is equipped with an operating portion 33 not lockable with the hand at the indoor side of the door main body 31, and the vertical slits 36 and 37 are provided in a region excluding a predetermined region M from where the operating portion 33 is not operable by inserting the hand of a person from the outdoor side of the door main body 31 but a person is able to insert the hand from the outdoor side of the door main body 31.</p> |
