| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve workability by fitting a footboard between side girders from the horizontal direction, and fitting a first connecting tool arranged on the side girders and a second connecting tool arranged on the footboard under surface. SOLUTION: A stairs device 1 has a side girder 3, a footboard 6, a first connecting tool 7 arranged on the girder 3 and a second connecting tool 8 arranged on the under surface both ends of the footboard 6. While the connecting tool 7 has a female member 11 having a recessed place 10 opening in the backward and mutually opposing directions, the connecting tool 8 has a male member 18. Next, while a slipping-out preventive projection 23 is arranged on the front end of the male member 18, a slipping out preventive recessed place 24 is arranged in the female member 11. Next, the male member 18 is pushed in the female member 11 by moving the footboard forward by horizontally arranging a riser 26-installed footboard 6 on the uppermost stage after fixing the girder 3 to left/right side walls 28 at execution by fixing the connecting tools 7, 8 to the girder 3 and the footboard 6 in a factory. The footboard 6 is fixed to the girder 3 by thread-mounting a screw inserted into the male member 18 on the girder 3 after similarly installing a lower side footboard 6. Therefore, the execution work can be easily performed by oneself, and the footboard can be firmly fixed.</p> |
