| 摘要 |
The invention relates to a sectional door with edge-guided sections which are movable from a vertical active position into an approximately horizontal position of rest located above the building aperture. In order, in doors of great width and with a low lintel, to avoid them striking there after they have experienced undesirable deformations, as a result of the invention supporting rollers are provided on the rear side of the sections at a distance from the running rollers and run onto rails when the door is opened. |
