| 摘要 |
PROBLEM TO BE SOLVED: To provide a frame structure of a door device capable of preventing the head part of a door from being strongly pushed against a head when a door frame is deformed in case of earthquake. SOLUTION: The door frame 1 is deformed toward a hinge side from the door head side by the earthquake, and the door head side of the door 40 is lifted upward to butt into the head 4 from the lower side. A screw for connecting the lower part 7b of a joint piece 7 to a lower side jamb 6 is broken by the push-up force, the head 4 is moved upward, and the joint piece 7 combined with the head 4 is slid upward to the lower side jamb 6. Since the end on the door head side of the head 4 has such a structure that it is relieved upward by the push-up force of the door head side of the door 40, the upper end on the door head side of the door is prevented from being strongly pushed against the head 4, and even if the door frame 1 is deformed by the earthquake, the door 40 is opened to enable a passage to ensure.
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