| 摘要 |
The traffic bridge (1) comprises a cross-bearer that is built through an arm (3) and has one end that is connected with a carrier support (2) and whose base above a track plate (20) in a mounting, street-side. The arm may be raised and lowered via the carrier support that is, in turn, formed from a parallel-linked rectangle (8, 11, 14 and 15) with one of it's sides being a rigid and upright vertical column (8) that is carried via the track plate and is rotatable about its axis whilst the opposite-lying side is built via a lever and which, via an extension, carries the bridge arm. The carrier support may be formed via a telescopic element. |
