| 摘要 |
PURPOSE: A screen opening and closing device for a greenhouse is provided to improve the producing and assembling efficiency by simplifying the structure of the screen opening and closing device. CONSTITUTION: A screen opening and closing device for a greenhouse comprises the following: an output shaft(5) including a second gear(4) coupled with a first gear(3) having more teeth than a gear(2) formed on the axis of a motor(1); a rotating shaft(7) including a third gear(6) coupled with the second gear; a speed reducing unit reducing the rotation number of a rotary shaft; a power shaft(9) including a fourth gear(8) transferring powder outputted from the speed reducing unit to a shaft for folding or unfolding a screen; an eccentric cam(10) installed to interlock rotate with the rotation of the rotating shaft; and an eccentric plate(12) coupled with the eccentric cam. |
