AUTOMATIC OPENING AND CLOSING APPARATUS AND METHOD FOR WARMING TUNNELS AND WARMING CURTAINS IN GREENHOUSE

摘要

Disclosed is a central winding type automatic opening and closing apparatus for warming tunnels and warming curtains in a greenhouse, in which a sheet roll formed by winding a vinyl sheet around a winding pipe is arranged above a warming tunnel so that the vinyl sheet is automatically unwound or wound in accordance with rotation of the winding pipe, thereby automatically closing or opening the warming tunnel. Sheet roll holders are arranged along a clip fixing rod extending across tunnel frames defining the warming tunnel. Each sheet roll holder is mounted to the clip fixing rod while being adjustable in level. The sheet roll is supported by the sheet roll holders via rollers while extending through a rest hole centrally formed at the sheet roll holder. As the winding pipe is rotated, the vinyl sheet is unwound or wound, thereby closing or opening the warming tunnel.