Patent ID: 7946332

Claim:
A gate comprising a gate leaf movable between a closed position and an open position; and having a plurality of gate leaf elements which are tiltable with respect to each other around tilt axes which are parallel to each other; guide rails used to guide the movement of the gate leaf between a closed position, wherein the gate leaf is in an essentially vertical plane, and an open position, wherein the gate leaf is in an essentially overhead horizontal plane, said guide rails having vertical sections which are essentially straight and essentially parallel to the lateral edges of the gate leaf when the gate is closed, the rails also having substantially straight, horizontal sections which are essentially parallel to the edges of the gate leaf when the gate is open, and the rails having curved sections which connect the straight sections; the gate leaf comprising a door with a door leaf, wherein the door leaf can be swung around a pivot axis extending essentially perpendicular to the tilt axes; and when closed, the door leaf is accommodated in an opening in the gate leaf; and when closed, the door leaf extends essentially parallel to the plane of the gate leaf; and a stabilizing arrangement which opposes the deformation of the gate leaf; wherein the stabilizing arrangement has a threshold element, which when the gate leaf is in the closed position, rests on the floor of the opening closed by the gate leaf; defines the bottom edge of the door opening; and is attached to the gate leaf elements adjacent in a first direction of the tilt axes to the door opening, the height of which threshold element in a second direction in which the pivot axis extends is, at least in the area of its edges which are essentially parallel to the tilt axes, less than 20 mm, wherein the overall height of the threshold element between the floor and the door leaf in the closed position is less than 22 mm, the width of the threshold element in a third direction that is perpendicular to the plane of the gate leaf in the closed position thereof is more than 150% of the thickness of the gate leaf in the third direction, over the entire thickness of the gate leaf and more than 80 mm, and wherein at least certain parts of the threshold element are made of a material of high tensile strength, such as steel, with a material thickness of 5 mm or less.