| 摘要 |
<p>The lifting device (1) is for reciprocally connected trusses and comprises at least three support legs (3), each with a support point (20), which in use rests on a ground surface. The support legs extend from a surface (4) through the support points. A bearer (5) is so connected to the support legs that it is at a distance from the surface (4). The lifting device (6) is connected to the bearer and has a fixture component (7) which in use fixes it to the trusses. The fixture component in a direction vertical to the surface (4) is moved between a lowered position and a raised position, the distance between the two positions being at least 3 cm and at most 50 cm. In a variant situation, the distance between the lowered positions can be at least 5 cm and at most 30 cm. The support legs (3) incorporate roller devices (19) for moving the lifting device over the ground surface.</p> |
