| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce cost and eliminate mistakes by using common members in composing straight stairs for going up and down straight and lower turning stairs bent perpendicularly at a lower end part. SOLUTION: Units are formed to correspond to necessary numbers of stairs for perpendicularly bending in lower turning stairs, and these units are selectively connected. An upper straight stair unit 1, a lower straight stair unit 2, and a lower turning stair unit 3 are prepared, and the selected one of the lower stair units 2, 3 is connected to legs 1a provided on the lower end side of the upper straight stair unit 1 to apply to straight stairs or lower turning stairs required.</p> |
