| 摘要 |
PROBLEM TO BE SOLVED: To provide a differential pressure eliminating-type door structure capable of eliminating differential pressure on indoor and outdoor sides without being attended with conventional inconvenience, so as to smooth the opening and closing of the door.SOLUTION: This differential pressure eliminating-type door structure includes: the door 5; a door frame body 3 in which the door 5 is to be mounted; a lock device 13 which is provided in the door 5; a vertical motion member 15b which is provided in the door 5 so as to move upward and downward in synchronization with the locking and unlocking operations of the lock device 13; a plug body 17 which is provided in the door 5 and operation-connected to the vertical motion member 15b so as to move upward in a downward movable manner from an upper portion of the door; and a vent hole 21 which is provided a door frame body portion facing the plug body 17. The vent hole 21 is closed by the abutment and engagement of the plug body 17 which moves upward depending on the locking operation; and the plug body 17 moves downward depending on the unlocking operation, so that the closing of the vent hole can be released. |
