To realize an expansion stretched chord truss structural body capable of being more simply constructed, removed and moved on the basis of a tensegrity structure.
A bendable strut material 5 by a hinge section 4 is placed to the inside of a pantographically deformable frame body 3, a cable 6 is stretched between both ends of the strut material and each summit of the frame body to form a development grid unit 1 as a constitution unit, the summits of the frame body of each grid unit are connected to each other to form a grid frame 8, and a chord member 7 is stretched between strut materials of the grid units adjacent to each other. In a state to develop the grid frame, both lengths of each cable and each chord member are so set that predetermined tensile force can be naturally introduced into each of them. The hinge section of the strut material is connected to the fame body with a connecting material 10, and the strut material is pushed and pulled to make it bend through the connecting material with the deformation of the frame body.
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama