| 摘要 |
PROBLEM TO BE SOLVED: To ensure the recognition of a falling down type visual line guide mark column by constituting a pole of the falling down type line of sight guide mark column by a plurality of parts connected in such a manner that they can be expanded and shrunk. SOLUTION: A spiral projection 12 is provided on an outer face of a pole part 11 made of polyurethane resin-based thermoplastic elastomer. Moreover, a spiral groove is provided on an inner face of a pole part 13 made of polyurethane resin-based thermoplastic elastomer, and a reflection material 16 made of recurrent reflection tape is attached to a peripheral face of the pole part 13. The spiral projection 12 of the pole part 11 is screwed in the spiral groove of the pole part 13 to form a pole 10. Furthermore, a cap 20 made of urethane resin foam is screwed in an upper end of the pole part 11, and a base 30 made of regenerated polyethylene resin is screwed in a lower end of the pole part 11. Consequently, when the pole part 13 is rotate, a mark column protrudes on a face S on which snow is accumulated so that it can be confirmed visually. |
