| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic film structure which always maintains an inclination for draining rainwater, scarcely allow rainwater to stagnate, and is free from occurrence of a so-called ponding phenomenon. SOLUTION: According to the pneumatic structure, a thrusting structure is formed on a circumferential cable or a ring truss. In the thrusting structure, upper ends of a plurality of compression members are connected to the cable or the ring truss, and lower ends of the same are bound by a tension ring. Then a tension member is connected to the lower end of each compression member so as to be radially arranged and to secure a hoisting fulcrum at a location higher than the lower end of the compression member. Thus by pulling the tension member to lift up the compression member, and by thrusting the cable or the ring truss, a film member around the cable or the ring truss is inflated upward. COPYRIGHT: (C)2007,JPO&INPIT
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