| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a telescopic boom for a working machine capable of being lightened and having sufficient strength corresponding to the crane performance. SOLUTION: In a telescopic boom comprising an outer boom 8 formed from a cylindrical body, an inner boom 9 formed from a cylindrical body inserted into the outer boom and slidable like a nest, and a slider 30 arranged between an inner surface of the outer boom 8 and an outer surface of the inner boom 9, the cylindrical body has the hexagonal cross section, and the end reinforcement members 31-34, 35-38 are provided on at least one of an outer surface of a front edge of the outer boom 8 and an inner surface of a rear edge of the inner boom 9.</p> |
