To provide a technique by which a film is hard to be broken when stretching a rigid film to make a multilayer structure, and an existing film house is turned into an agricultural greenhouse excellent in heat reserving/insulation effectiveness.
A multilayer structure agricultural greenhouse comprises the steps of: screwing and fixing a raising member 20 to outside of an inner layer side fixing member 10 screwed and fixed to a purlin material and the like so as to be piled up; attaching a synthetic resin cap 30 to the raising member 20 so as to extend an edge thereof; and stretching an external layer rigid film F1 which is an outermost layer beyond the edge of the raising member 20 to the tip of the synthetic resin cap 30 and fixing it. The synthetic resin cap 30 includes a fitting part 32 which has a fitting structure fitted to a raising body part 23 of the raising member 20. An external layer support part 33 of which side surface shape is a wedge shape as a whole with a tapered tip portion includes: a horizontal part 33a which is flush with an upper surface of a film support part 22 of the raising member 20 from a rear end to a prescribed length; and an inclined plane 33b of which height gradually becomes lower from the end of the horizontal part 33a to the tip.
KOKUBO KOJI
DAIMON HIROAKI
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