Abstract: A rolling door is provided with a flexible door panel which can be wound upon a winding shaft pivoted above the door opening and provided with a drive. On the bottom end of the door panel, a stop rail of length less than clear span between side sections limiting door opening, is provided at two ends with fastening for wires running over pulleys supported in a bottom region and bracing the door panel. In the side sections, slide-like blocks are guided vertically slidably, detachably connected to the ends of the stop rail by a retainer and provided with breakthroughs for the wires running from the pulleys in the bottom region to the stop rail. To restore the rolling door to operation simply and where possible even automatically after a crash, the retainer is constituted by locking devices which release the stop rail in the event of force acting thereon from the side and which, when the blocks are pressed on from above, again interlock the stop rail and blocks.

Abstract: The invention relates to a door or gate closing mechanism having essentially rectangular closing elements disposed horizontally and in parallel to one another which are movable in manner overlapping one another. The closing elements are driven in such a way that the second closing element is travelled at double the speed of the first and the third at three times the speed of the first and the last at a speed corresponding to the speed of the first closing element multiplied by the number of closing elements. Thus, only the bottom-most closing element is travelled over the full height at maximum drive speed during the opening or closing of the door while the remaining closing elements have to be travelled at a correspondingly lower speed over correspondingly shorter distances. In this way, overall a favourable energy balance is produced during the opening and closing of the door closing apparatus in accordance with the invention.