DEVICE FOR OPENING AND CLOSING TRANSOMS AND GREENHOUSE DOORS Russian patent published in 2021 - IPC A01G9/24 

FIELD: agriculture.

SUBSTANCE: invention relates in particular to devices for ventilation of greenhouses for both household and industrial purposes and can be used to open and close ventilation openings in greenhouses, such as transoms and doors. A device for opening and closing transoms and greenhouse doors, with at least one drive shaft 1 located in it, installed along either side of the greenhouse, including the end one, and connected to the drive, containing at least one reversible pusher 4. Inside the greenhouse, an additional shaft is installed parallel to each drive shaft 3. Each reversible pusher 4 contains a drive sprocket 5, a driven sprocket 6, a closed chain 7, covering the indicated sprockets, and at least one link 8. Drive sprocket is installed on one shaft, and the driven sprocket is mounted on the other shaft. Each rod 8 at one end is pivotally connected to the closed chain 7 of the corresponding reversing pusher 4, and the other end is also pivotally connected to the corresponding transom or greenhouse door. The distance between the drive 1 and the additional 3 shafts, fixed on the bearing elements of the greenhouse, is adjusted by means of adjusting devices installed on the side of the additional shaft, providing a working tension of the closed chain 7 of each reversible pusher. Rods 8 are made with adjustable length. Additional shaft 3 is installed so that reversible pushers 4 are located at the required angle to the sides of the greenhouse.

EFFECT: design provides structural strength, ease of manufacture, low cost of its components, ease of use and reduced wear of components.

6 cl, 8 dwg