| 摘要 |
PROBLEM TO BE SOLVED: To provide an opening and closing device capable of vertically moving a transferable body interlocked with the rotation of a shaft and opening a resin sheet from the upper side. SOLUTION: This opening and closing device for winding and re-winding a resin sheet S of a simple hothouse constituted by covering the resin sheet S over a skeleton K for forming an inner space, is equipped with racks 10 as a pair of rails mounted in parallel at a prescribed interval at the skeleton K, a transferable body 20 installed at each of the racks 10 as transferable in a shuttle movement, a shaft 21 installed between the transferable bodies 20 as rotatable for winding and re-winding the resin sheet S, a pinion gear 30 as a traveling body installed at the transferable bodies 20 and also driven interlocked with the rotation of the shaft 21 and biting with the racks 10, a rod 34 installed with the transferable body 20, and a holding member 40 installed at the rod 34 for holding by housing the resin sheet S wound by the shaft 21. |
