| 摘要 |
PROBLEM TO BE SOLVED: To prevent a door from being excessively opened even when any operation is not performed. SOLUTION: A through hole 12d is formed in a lock member 12 installed on an inside door 2, a tubular member 7 allowing a lock pin 9 inserted into the insert hole 12d to be inserted therein is fixed to a body 1, and an engaging member 12c for limiting the opening of the inside door 2 in engagement with the tubular member 7 is formed on a lock member 12.
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