| 摘要 |
<p>A collapsible access tower has a chassis (10) supporting a pair of road wheels (11) and outriggers (16,17) to impart stability when in use, and a pair of extensible multi-section columns (26,50) carrying a platform (35). A section (27) of one column (26) is rigidly connected to the chassis and another section (33) of that column to the platform (35). The other column is configured as an extendible ladder (50) one section (51) of which is hinged to the chassis (10) and another section (52) of which is hinged to the platform (35). When the platform is in its lowermost setting, the hinged connections of the two sections (51,52) of the ladder (50) are co-axial so that the ladder may be pivoted to a transit setting. A winch arrangement (39) is associated with column (26) to allow raising and lowering of the platform (35).</p> |
