Patent ID: 8783327

Claim:
A flexible curtain door comprising: a structure comprising uprights and a transverse element making it possible to guide a flexible curtain, electromechanical means supported by the structure making it possible to maneuver the curtain between an open position and a closed position, the flexible curtain comprising: a flexible material of a substantial entirety of the curtain; at its free end, a multi-directional ballast and sealing element, at least one reinforcing element traversing a substantial width of the curtain and being disposed substantially within the curtain, the reinforcing element being substantially parallel to the ballast and sealing element, and the reinforcing element including a first stay and a second stay that are each disposed entirely within the curtain, wherein the door has obstacle detection means supported at least partly by the reinforcing element, the obstacle detection means being adjacent to the ballast and sealing element and situated upstream of the sealing element, on a closing trajectory of the curtain, between the reinforcing element and the ballast and sealing element, wherein the obstacle detection means comprises an emitting cell for emitting a beam supported by the first stay, and a receiving cell for receiving the beam supported at the other end of the reinforcing element by the second stay, such that the emitting cell, the receiving cell, and the first stay and the second stay that support the emitting cell and the receiving cell are disposed entirely within the curtain, the beam between the emitting cell and the receiving cell being parallel to the reinforcing element and the ballast and sealing element, being transmitted from the emitting cell to the receiving cell via a space disposed outside of any rigid enclosure, and being able to be cut by a deformation of the ballast and sealing element when it encounters an obstacle.