| 摘要 |
<p>A takedown staircase in which the upward joint 2 and the downward joint 3 are vertically installed at the base end and front end of horizontal base plate 1, comprises a stair unit 4 which will be connected to a plurality of upper and lower flights by mutually inserting/uniting the upward joint 2 and the downward joint 3, a bolt 7 which fixes the upward joint 2 and the downward joint 3 by being spirally inserted into a nut 6 fixedly installed in the downward joint 3 from a longitudinal long hole 5 bored in the upward joint 2 and a tread 8 which will be fixed to the upper surface of horizontal base plate 1.</p> |
