| 摘要 |
A vertically collapsing closure system comprising a door consisting of a plurality of rectangular panels in a side-by-side arrangement with each said panel being hingedly connected to each adjacent panel, and a means for operating the door to the full open position by causing the panels to rise vertically until at the height of the opening and then to fold or collapse into a compact terminal stack configuration and then to operate in reverse completing descent vertically once again fully closing the involved opening. The means for causing the door to so operate include panel mounted roller assemblies, vertical structural rail sections to either side of the door, complete in certain cases with cams and other devices, to cooperate with the roller assemblies in guiding and supporting the door in operation, and a counterweight connected to the movable door that has its counterweighting effectiveness varied as a function of the position of components which make up the counterweight to adapt the counterweight to the varying forces exerted by the door during the preferred movement of the door. For automatic operations, required small amounts of external energy and power are applied between door opening and closing sequences. |
