摘要 |
<p>The device has a carriage (2) and a guide (1), where one of the carriage and the guide is integrated to an opening frame of a door, and the other is integrated to a door frame. Rollers (21, 22) are in contact with each other. A running gear is assembled on the carriage in a mobile manner in translation parallel to the guide and along limited stroke. Another running gear exerts pressure individually on the rollers of the former running gear, where amplitude of the pressure is based on relative position of the former running gear with the carriage.</p> |