| 摘要 |
PROBLEM TO BE SOLVED: To suppress meandering deformation, to facilitate re-spreading, to improve operation efficiency and to save manpower by winding a vinyl sheet for a greenhouse by rapidly enlarging a winding diameter in the initial stage of the winding of the vinyl sheet by a winding shaft. SOLUTION: Relating to this winding structure of the vinyl sheet 2 constituted so as to spread the vinyl sheet 2 in a prescribed spreading area 2a on almost parallelly installed frame materials 1 for constituting the roof bones, side face bones or ceiling bones of the greenhouse, to open the spreading area 2a by rolling the winding shaft 3 arranged so as to be almost orthogonally crossed with the frame materials 1 in one direction on the frame materials 1 and winding the vinyl sheet 2 by the winding shaft 3 and to close the spreading area 2a by rolling the winding shaft 3 in the other direction and unwinding the vinyl sheet 2 from the winding shaft 3, the winding diameter is rapidly enlarged in the relatively initial stage of the winding of the vinyl sheet 2 by the winding shaft 3 and the vinyl sheet for the greenhouse is wound. Also, it is preferable to perform this method by fixing a spacer 4 for rapidly enlarging the winding diameter. |
