| 摘要 |
PROBLEM TO BE SOLVED: To allow escape from the hinge side when the escape in emergency is difficult caused by the breakage of a lock of a door, a caution device on the lock side, or the like. SOLUTION: Each part of the hinge is tapered so as to be easily separated, and a pin is pulled out in emergency. The hinge can thereby be separated from the indoor side, and the door can be easily detached.
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