| 摘要 |
The present invention relates to a winding rod for a cover opening/closing device for the ventilation and thermal insulation of a plastic greenhouse and a livestock shed by the connection of rod members having a unit length. The present invention includes: the polygonal rod members (10) which are formed of an aluminum alloy, have a hollow shape, and have both end portions opened; a connection pipe (12) with a half part inserted into each facing end portion of the other rod members to be connected to one of the rod members; and a reinforcing member (13) with both end portions pressed into the end portion of the rod members (10) and the facing end portion of the connection pipe (12) for rigidity reinforcement and water-tightness. According to the present invention, the entire winding rod can be light in weight, the connection pipe and the reinforcing member have increased rigidity at a joint, anodizing deposition surface coating improves durability and corrosion resistance, and on-site winding rod assembly is conveniently performed even without any additional equipment. In addition, the present invention can minimize the economic burden on farming households with semi-permanent durability, compared with hot dip galvanizing pipes of the related art which have to be replaced every three to four years due to corrosion. |
