| 摘要 |
PCT No. PCT/SE82/00398 Sec. 371 Date Jul. 14, 1983 Sec. 102(e) Date Jul. 14, 1983 PCT Filed Nov. 25, 1982 PCT Pub. No. WO83/01972 PCT Pub. Date Jun. 9, 1983.A self-retaining post of a plastic material, such as PVC, for use as a roadside marking post, a traffic sign post, a lamp post, or for other comparable uses in road traffic environments, has a channel-shaped bending zone with substantially arcuate cross-section and with the convex side facing the on-coming traffic. The cross-sectional area of the bending zone increases progressively towards the lower end, whereby the flaring-out zone formed upon bending of the post will be larger below than above the line of bending. The greater inherent resiliency of the material below than above the line of bending will cause the post to bend back into an upright position after having been hit by a vehicle. Certain embodiments of the posts are manufactured by diagonally splitting lengths of extrusion-molded plastic tubing, forming two identically shaped posts from each tube length. |
