| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve workability by facilitating mounting operation. SOLUTION: A mounting base 22 is fixed on one side of a support 13, and a supporting arm 23 is fixed rotatably to the mounting base 22 in the horizontal direction of the support 13. The supporting arm 23 is projected in front of the support 13, and the handrail 17 is supported by a holding member 24 installed at the front end of the supporting arm.</p> |
