| 摘要 |
PURPOSE:To facilitate the changing work of a centerline by fixing a strip elastic body as the centerline by means of magnetic force, and moving a setup position with an automobile with a block group at the bottom. CONSTITUTION:An electromagnet 2 is set up in a cavity part 1b at the underside of a strip elastic body 1 with each recess 1a at both sides, adding voltage to it by a lead 4, and thereby it is magnetically attracted to a magnetic substance 5 fixed to a road surface 3. In order to move the strip elastic body 1 from a centerline position on one side to a centerline on the other, such an automobile 6 that has a lot of blocks 7 on the underside and is set up in a line bent in two rows, and whose front and rear sides are approached to the road surface 3, selarating its central part from this road surface 3, is used. Then, the paired block 7 are engaged with each recess 1a at both sides of the strip elastic body 1 and they are successively guided to the centerline position on the other, and thus the movement takes place. |
