UPPER GUIDE DEVICE WITH SPRING-LOADED ROLLER Russian patent published in 2002 - IPC

FIELD: locksmith's work. SUBSTANCE: the upper roller guide device for door movement on the rolling guide, having the shape of turned over letter U, has a body for installation on the door with an axle stretching upwards and a roller on it for engagement for rolling with one side wall of the guide. A vertically directed torsion member is installed in the body and has a vertically stretching elongated torsion rod fixed in the body with its lower end, horizontally stretching lever attached with one end to the upper end of the torsion rod and stretching from the first axle, and an axle stretching from the first axle, and an axle stretching upwards not far from the other end of the lever. The second roller on this axle for rolling is engageable with the other side wall of the guide and positioned at a distance from the first roller. The second roller and the lever are made for flexible displacement about the longitudinal axis of the torsion rod in the direction to the mentioned body for insertion of the rollers in the guide. The obtained torque in the torsion rod sets up a force tightening the lever and just the second roller for maintaining the tight engagement of the rollers with the side walls of the guide at their rolling. EFFECT: improved construction. 15 cl, 10 dwg