| 摘要 |
A framework has bearing members, each of which consists substantially of a wire spiral, which is stayed by means of a plurality of stiffening wires, which extend in the longitudinal or pitch direction of the spiral and are arranged around its circumference and which are securely fastened to it at mutual contact points. At each end, the bearing members are closed by an end ring. Joint elements serve to connect the ends of two or more bearing members to one another. The joint elements have the shape of a regular polyhedron and consist of several wire rings which are arranged on the delimiting surfaces of the polyhedron, which contact each other pair-wise on the edges of the polyhedron, and which are securely joined with each other at mutual contact points. A tensioning ring is provided for connecting the joint elements with the ends of the bearing members, one end of the tensioning ring being insertable into the wire rings of the joint element, and the other end of the tensioning ring being insertable into the end rings of the bearing members.
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