| 摘要 |
The present invention relates to a framework for a multistage extension vinyl greenhouse. The framework comprises: an arc unit having a multistage extension structure in which minor arc pipes with different pipe diameters are sequentially fitted and coupled in the order of pipe diameter and extended along a circular arc, and having a central angle of 180° or less when being maximally extended; a vertical unit vertically connected by a joint in every lower end of the arc unit with a linear pipe structure; and a horizontal unit horizontally connected by a joint at every particular height of the arc unit and the vertical unit with a linear pipe structure. A minimum pipe diameter minor arc of the arc unit is disposed in the top end center of the arc unit, and a cross-section of each unit has a predetermined shape, so strength of each unit is reinforced and a width of a vinyl greenhouse can be adjusted by the arc unit having a multistage extension structure. Also, transportation and storage can be easily performed. |
