| 摘要 |
A supporting framework for a shelter shed which framework comprises mutually spaced parallel support arches and transversal beams interconnecting said support arches. Each support arch comprises several arch elements connected to each other longitudinally one after the other by means of articulated joints positioned at the ends of the arch elements. Said joints consist of double brackets each provided with two separated holes having parallel axes for fastening pins. Two double brackets are mounted at each end of each arch element at a distance from each other so that the holes of both double brackets are positioned in pairs coaxial with each other and the axes of said holes are parallel with the radius of curvature of the support arch. The double brackets of two adjacent arch elements are fastened to each other by means of two fastening pins inserted in said brackets through said holes. Subsequent arch elements are pivotable side by side around one of said fastening pins when the other fastening pin is removed. |
