| 摘要 |
PURPOSE:To obtain the apparatus capable of easily controlling the heat-insulation, light-shielding and ventilation of a greenhouse by fixing a spacer plate to the outer circumference and a guide plate to the inner circumference of the air-passing opening of a duct tube and fitting a gate plate in a guide groove. CONSTITUTION:This apparatus for controlling the opening of a self-running house curtain is extended at the upper part of a greenhouse. Guide rollers 11 are put and supported on a piano wire 9 stretched at the upper part of a greenhouse H, a number of flat cylindrical duct tubes T1 to Tn are formed in a state to enable the passage of air, a clamping tool B is attached to the upper end and the tool is suspended with the guide rollers 11. A laterally extended U-shaped spacer plate 16 opened at an end is fixed to the outer circumference of the opening of the air-passing hole 15 of adjacent duct tubes and guide plates 17,18 having laterally extended rectangular opening are fixed to the inner circumference of the opening. A gate plate 19 is slidably inserted and supported in a guide groove formed of the spacer plate 16 and the guide plates 17,18. The curtain is driven by feeding air to the duct tubes T1 to Tn or exhausting air from the tubes. |
