| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus for manually opening and closing at a ceiling of a plastic greenhouse by one person and also stretching and fixing of a plastic sheet in a simple plastic greenhouse such as a semicylindrical plastic greenhouse. SOLUTION: In this semicylindrical vinyl greenhouse comprising a pipy structure as a framework, a vinyl sheet covering the semicylindrical part and side walls of the greenhouse is divided into two parts along a ridge, rolls for winding the vinyl sheets are installed at the side wall parts at both sides and reels for winding string members for drawing out attached to the drawing out end parts of the vinyl sheets are arranged at the side wall parts at the opposite sides, respectively. |
