| 摘要 |
The support arm (2) counterforce system continuously compensates the mass of a supported object, with the support arm contg. a top and a bottom arm shank formed as a parallelogram. Its two parts contain each a joint part, the first one contg. a fastener and the second one (8) an object holder. For transport and assembly the horizontally fixed mechanism has a transport safety (11) to cancel the counterforce system function. The safety is fitted to the second joint part and has a stop rim (12) so adjustable that it blocks in the first portion the support arm, while releasing the blocking in a second variation (14). |
