| 摘要 |
PROBLEM TO BE SOLVED: To provide a door that is gently and fully closed by comprising not a door closer with a high-pressure container but small resistance means, and provide a reduction gear that does not damage a dwelling environment and that can be miniaturized.SOLUTION: A device for decelerating a door is operated by a spring different from a spring for urging the door. Even when a weak spring is adopted, either the device for decelerating the door or a device for urging the door is operated, and the door is necessarily put into a fully closed state without being kept in a stopped state even in the case where the door is stopped midway through a closing operation. Resistance acting on the door is automatically removed after deceleration, and the spring decelerating the door is restored to inhibit rotation in a door opening direction. |
