| 摘要 |
PROBLEM TO BE SOLVED: To obtain an excellent cushioning effect, and to simplify installation and attain temporary reuse by forming a collision cushioning body of a shell body composed of a thermoplastic synthetic resin formed in a hollow body having a large diameter and a plurality of expansion pipes housed in the shell body and made of the thermoplastic synthetic resin. SOLUTION: A plurality of expansion pipes 3 made of a thermoplastic synthetic resin are housed into a shell body 2 and used as a cushioning material, recoverability to deformation is improved, and the cushioning body has properties being difficult to be broken even by deformation. Since the cushioning body abounds in lightweight properties at that time, the cushioning body can be reinstalled even when the shell body 2 is to some extent broken. Consequently, the shell body 2 is also composed of the expansion pipe molded by the same method as the expansion pipes 3 and made of the thermoplastic synthetic resin on strength. A blow molded form comprising a resin such as polyethylene, polypropylene or the like, an extrusion molded form or the like is employed normally on molding. Accordingly, reinstallation is carried out, and the same effect as an effect before a collision cannot be displayed, but temporary use is enabled and the safety of a road can be maintained continuously.
|
