| 摘要 |
A platform carrying machine, particularly useful for viaduct inspection, is mounted on a carriage and includes a platform-carrying boom structure mounted on the end of a horizontal support arm which can be swung laterally outwardly from the carriage. The boom structure is arranged to elevate and/or depress the platform relative to the carriage to inspect areas above and below the level of the carriage, the platform having a range of horizontal movement allowing the platform to enter, for example, a viaduct arch beneath the carriage. The entire boom structure can in addition be slewed about a vertical axis at the end of the lateral support arm to further increase the range of positions of the platform. |
