| 摘要 |
PURPOSE: A joint structure for a square pipe is provided to accurately connect multiple pipes and to install frames for installing anchors at once by lifting up the connected pipes. CONSTITUTION: A joint structure for a square pipe comprises a first pipe(10), a second pipe(20), connection plates(30), a fixing unit, an initial connecting unit, and a final connecting unit. One end of the connection plates is arranged in the end of the first pipe, and the other end is arranged in the end of the second pipe. Open holes(31) are formed in the connection plates at uniform intervals. The fixing unit fixes the connection plate to each pipe. The initial connecting unit connects joints of the first and second pipes exposed to the open holes of the connection plates. The final connecting unit connects joints of the first and second pipes separated from the fixing unit.
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