| 摘要 |
FIELD: construction. ^ SUBSTANCE: invention is related to the field of construction, namely to door designs, and may be used in industry for operation under higher load. Roll door comprises roller for winding and reeling of door curtain, facilities for collection of rope arranged near door aperture, drive, diverting facilities arranged with the possibility to carry out working stroke/stretching in case external load acts at curtain with rope wound and reeled from it, the first end of which is connected to lower part of curtain, from which rope passes in pulleys, and the second end is connected to facilities for its collection. Roll door is made with facilities that prevent working stroke of diverting facilities beyond a certain point, so that to preclude displacement of curtain in close position in case of load action at it. ^ EFFECT: invention makes it possible to increase door rigidity due to reduction of its buckling in vertical direction. ^ 38 cl, 22 dwg |
