| 摘要 |
A steel structure for plastic greenhouse with a height adjusting device between a support pipe and a middle connection pipe to individually control the height of the main frame is provided to linearly control the height of the main frame, and thus allows easy installation of the steel structure. A steel structure for plastic greenhouse comprises: a plurality of main frames upright installed at regular intervals on the ground to form an arch shape at the upper part; and a plurality of sub-frames interconnecting the main frame to cover with vinyl film, wherein the main frame contains: a pair of support pipe(110L,110R) spaced apart from each other are regular intervals and installed perpendicular to the ground; a middle connection pipe(120) each connected to the upper end part of the support pipe at both ends and having an arch shape at the central portion; and a height adjusting device each disposed between the upper end of the support pipe and the end of the middle connection pipe. The high adjusting device contains: a male member(140) with a screw thread(141), a female member(150) with a pin hole(152); and an adjusting ring(170) with a handle(171). Mounting holes(112,121) of the support pipe are formed at the upper end of the support pipe and the end of the middle connection pipe. |
