| 摘要 |
A wheeled top-guide for rolling movement of a door along a track having a first roller on a first axle 50 in rolling engagement with one wall of a track; and a vertically oriented torsion member 58 connected via a horizontal arm 60 to a second axle 62 and second roller. When the guide is inserted into a track (see fig 6) a torque is induced in the torsion rod, said torque maintaining said rollers in firm rolling contact with the side walls of said track. In a preferred embodiment the same principle is applied to three rollers (see figs 8-10). |
