| 摘要 |
PURPOSE:To carry out opening and closing operation of a door either automatically or manually by change-over operation by inserting and extracting a screw passing through a long hole drilled on a driven wheel so that connection of a driving wheel and the driven wheel is made closely in one body or unrelated to each other. CONSTITUTION:A door 1 is supported with support arms 2, 2 on the side edges on supports 3, 3 free to rotate and lift. A drive output of a motor M is transmitted to a rotative wheel P and it is transmitted to a driven wheel Q having a rotative shaft q idly engaged to it concentrically. Additionally, connection of the rotative wheel P with the driven wheel Q is carried out with a screw S screwed and fixed through four pieces of long holes V drilled and provided on the driven wheel Q so that it is made to be unrelated each other in the rotative direction of itself by removing the screw S. When it is used as an electric rotative lift door, the rotative wheel P and the driven wheel Q are made closely in one body with the screw S, and in the case when it is manually used, all the screws S are extracted and load of a gear head and others is removed and the door 1 is manually operated to open and close. Consequently, it is possible to simply grade up a manual rotative door to an electric one as well as simply and easily carry out manual-automatic exchange operation. |
