The present invention relates to a switch for a plastic house, and more specifically, two disks 11 and an driven gear 7 in the middle of the involute spiral 1201 of the horseshoe rotation shaft 12 are respectively engaged with the disks 11. ) And a fixed plate 8 having a ratchet gear 801 formed therein between each side of the driven gear 7 and the driven gear 7, respectively, and having a stopper 1001 engaged with the ratchet gear 801 of the fixed plate 8. The stopper wheel 10 is installed to be idling, but the gap direction of the two fixing plates 8 is opposite to each other, and the spacer 901 is inserted into the through hole of the fixing plate 8 to be fixed to the fixing shaft 9. In a switch for a plastic house operated by a drive gear 601 mounted to a drive shaft 6 in a configuration in which a left nut 1203 is fastened to a case 13 by fastening a left nut 1203 to a left screw portion 1202 of the present invention, The concave groove is formed in the outer circumference of the disc so that the chain 4 spans, and the gear 201 and the seating groove 202 alternately protrude from the circumferential direction along the bottom of the concave groove so that the chain 4 is coupled. A chain pulley (2) protruding from the pulley shaft (203) to be coupled to the actuator drive shaft (6) at the center of the disc； The outer surface of the chain pulley is covered to surround the chain pulley 2 so that the lower part is opened and the engaging protrusion 301 and the engaging groove 302 protrude from the inner side facing the opening and closing body 5 so that the engaging protrusion 301 is a switch. The coupling groove 302 is fastened to the main body 5 is a switch for a vinyl house, which is equipped with a chain block 1 composed of a chain pulley cover 3 coupled with the main body of the switch.본 고안은 비닐하우스용 개폐기에 관한 것으로 보다 구체적으로는 말대회전축(12)의 인볼류트나선(1201)에 두개의 디스크(11)와 그 중간에 피동기어(7)를 각각 치합하고 상기 디스크(11)와 피동기어(7) 사이에 라체트기어(801)가 내측에 형성된 고정판(8)이 양측으로 각각 부설되며 상기 고정판(8)의 라체트기
