| 摘要 |
PROBLEM TO BE SOLVED: To provide double wing doors improving crime preventive property and convenience of opening operation. SOLUTION: A fitting member 21 is positioned to cross a turning trajectory of a operation part 12 of a locking means 10 in a state that the fitting member 21 of a door guard 20 is fitted to a retained member 22, and unlocking operation of an operation part 12 is regulated so that it can not unlock one door body 6, and illicit unlocking is prevented to improve crime preventive property. Since mechanism to lock the operation part 12 of a locking means 10 is not required, engagement of the door guard is released and the other door body is opened in opening the double hinged doors, and the operation part 12 of a locking means 10 becomes operable to easily open one door body 6, so that convenience of opening operation is improved. COPYRIGHT: (C)2006,JPO&NCIPI
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