| 摘要 |
PURPOSE: A plastic sheet holder is provided to install two or three layers of plastic sheets having excellent transparency inside a plastic greenhouse for improving a warm-keeping effect. CONSTITUTION: Combining grooves (2,2a) corresponding to the cross section of a plastic greenhouse supporting frame (1) are formed on the upper side of a plastic greenhouse. Plastic sheet fixing grooves (3,3a) are formed on the lower side of the plastic greenhouse. The plastic sheet fixing grooves have a long arc with the length shorter than the half of the cross section of the supporting frame, and longer than the 1/4 of the cross section of the supporting frame. The combining grooves and the plastic sheet fixing grooves are connected using connection pieces (4,4a). The connection pieces are coupled by a coupling bolt and a nut through a coupling hole. The connection pieces include flexural units (4d,4e) to be folded and unfolded. The combining grooves include a jamming protrusion (4f) and a jamming groove (4g). |
