| 摘要 |
PROBLEM TO BE SOLVED: To automatically restore a door main body from the open position side to a closed position in a door device using a support arm. SOLUTION: A hinge 4 is composed of a pair of hinge halves 4A and 4B. A coil spring 48 is provided in a cylindrical part 42 of the hinge half 4A. The support arm 2 is energized to be rotated from the open position side to the closed position by this coil spring.
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