| 摘要 |
A scaffolding having a working platform which can be raised and lowered parallel to the scaffolding axis and can be adjusted in terms of distance from the scaffolding axis. The working platform comprises a plurality of sectors arranged in the shape of a ring or arc. The sectors can be raised and lowered at the same time and their radial distance from the scaffolding axis can be adjusted at the same time. In this arrangement there are provided on a standing scaffolding two raisable and lowerable load-bearing rings which are arranged one above the other preferably concentric with the scaffolding axis, and on one of the load-bearing rings there is articulated a multiplicity of load-bearing arms which can be pivoted in different radial planes and, by means of their free ends, hold the sectors of the working platform which, as a whole, is in the shape of a ring or arc. The load-bearing arms are articulated on the lower load-bearing ring and in each case one load-bearing cable engages preferably on the free ends of the load-bearing arms. Said load-bearing cable is anchored on the upper load-bearing ring or is guided, via a deflection roller or the like, on the upper load-bearing ring and the load-bearing arms can be raised and lowered by means of said cable.
|
