| 摘要 |
PROBLEM TO BE SOLVED: To provide an excellent tension film structure capable of correcting the installation error and thermal deformation of a film material, having a sufficient proof stress and an extremely high weather resistance, and minimizing the necessity of maintenance such as cleaning and replacement. SOLUTION: A large number of unit corrugations 10, each formed of linear recessed grooves 11 and linear recessed grooves 11a in the direction orthogonal to the recessed grooves, are distributed on the entire surface of a thin sheet metal 9. The thin sheet metal is installed tensely as a film material.
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