| 摘要 |
A post assembly has a free-standing upright, a wall mount assembly, a platform support assembly, a cylinder mounting bracket and a hydraulic cylinder. The wall mount assembly is engaged with the upright proximal the top end for mounting the upright to a building structure. The platform support assembly has a slide tube movably engaged with the upright, one or more platform support arms mounted to the slide tube for supporting one or more platforms, and a lock for engagement with the upright to prevent downward movement of the slide tube. The cylinder mounting bracket is movably engaged with the upright and has a lock for engagement with the upright to prevent downward movement of the cylinder mounting bracket. The hydraulic cylinder is mounted to the slide tube assembly and the cylinder mounting bracket. The hydraulic cylinder is actuable to produce relative vertical movement between the slide tube and the cylinder mounting bracket by moving either the slide tube or the cylinder mounting bracket. Two or more post assemblies may be used together to form a height adjustable scaffolding system.
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