| 摘要 |
PROBLEM TO BE SOLVED: To provide a roof truss structure of a vinyl greenhouse for agriculture and horticulture efficiently constructed by anybody in a short time. SOLUTION: This roof truss structure is such that the upper ends of a rafter metal straight pipe (2) are connected and united to each other through a ridge first metal pipe joint (A1) bent in a mountain shape of about 120 degrees (θ), and top and bottom mutual intervals between the rafter metal straight pipe (2) and a pillar metal straight pipe (1) are connected and united to each other through the same pole plate first metal pipe joint (B1) as the ridge first metal pipe joint (A1), and back and front mutual intervals between the ridge first metal pipe joint (A1) and a ridge metal straight pipe (3) are connected and united to each other through a ridge second metal pipe joint (A2) different from the first metal pipe joints (A1) and (B1), and back and front mutual intervals between the pole plate first metal pipe joint (B1) and a pole plate metal straight pipe (4) are connected and united to each other through a pole plate second metal pipe joint (B2) the same as the ridge second metal pipe joint (A2). COPYRIGHT: (C)2008,JPO&INPIT
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