| 摘要 |
A rail arrangement (1) is described, which is fixed to a building structure and is adapted to be able to support, displaceably along a rail (2) belonging to the rail arrangement (1), a load connected to a beam (3), which is designed to be capable of being displaced sideways, which beam (3) in its end area facing the rail arrangement (1) is provided with a trolley unit (5) equipped with rollers (6, 7) having contact or rolling faces (9a, 9b) which cooperatively encircle internal, adapted, corresponding contact or rolling faces (8a, 8b) on the rail (2) encircling the trolley unit (5), wherein the rail (2) is provided as a profiled rail with a web portion which at opposite end portions is shaped with outwardly projecting legs provided with the respective rolling or contact faces (8a, 8b) and that the trolley unit (5) may be provided for motorised operation in that at least one drive wheel (6) can be driven by a drive means (4), on which drive wheel (6) the rolling or contact face or faces (9a, 9b) are provided in such manner that there is obtained good gripping power with the rolling or contact face or faces (8a, 8b) on the rail (2), which are so oriented that a moment of force from the load will be transferred via the beam (3) and the wheels (6, 7) towards the contact faces on the rail (2). |
