| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a variable stairs unit properly installable regardless of the stairs height, and capable of putting a step board in a steady stable state. <P>SOLUTION: This variable stairs unit is composed of an upper chord member 11 and a lower chord member 12 arranged in parallel in the oblique vertical direction; and has a pair of side beams 10 oppositely arranged in the breadthwise direction, and a plurality of step boards 20 substantially horizontally arranged between the side beams and connected to the respective upper chord members 11 and the respective lower chord members 12 in a freely rotatable rotary state or a irrotational fixed state. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
