| 摘要 |
<p>A door opening assisting device that has a simple structure not requiring a dedicated operation member for assisting opening of a door and whose operability and reliability when it operates in synchronous with door opening operation are enhanced. The door opening assisting device is constructed as follows. With opening and closing of the door, a passive member (20) connected to a door closer for rotatingly urging the door in the closing direction is rotated in the normal and reverse direction, and the rotation of the door closer causes transmission members (30, 31) to reciprocate in the direction corresponding to the opening and closing of the door. In this process, the opening of the door causes an opening spring (51) to urge and move the transmission member (30) in the door opening direction, and after opening force is accumulated in the spring (51) by the movement of the transmission member (31), the spring (51) is locked with the opening force accumulated in it. In the construction above, when the passive member is rotated in a predetermined angle region in the initial stage of door opening operation, this causes the opening spring to exert opening force and also causes the spring to accumulate opening force and then to be locked with the opening force accumulated in it.</p> |
