DELINEATOR HAVING LIGHT GUIDE ROD, AND GUARD CABLE

WIPO Patent Application WO/2020/213041

A1

[Problem] To provide a delineator having a light guide rod, and a guard cable in which the same is used, in which light emission performance is unlikely to be reduced even if used outdoors for a long period of time, and which is easy to install and is unlikely to loosen after winding. [Solution] This delineator is configured from: a rope member formed by twisting a plurality of strands; a peripheral-surface light-emitting light guide rod wound in a state closely attached to spiral-shaped valley sections formed between the strands on the outer periphery of the rope member, the light guide rod comprising a core layer having an acrylic resin as a primary material, and a cladding layer having a fluororesin as a primary material; and a light source device mounted on the end part of the light guide rod. The amount of change in the brightness of the light guide rod during 1000 hours of testing using an accelerated weathering machine is within the range of ±10%, and the amount of change in the numerical values of colors (x, y) is within the range of ±0.02. Furthermore, the bend elasticity of the light guide rod in an atmosphere of -20°C is 0.5 to 5.0 × 103 MPa, the rope member is formed by twisting the strands at a twisting angle within the range of 10-20°, and the spiral-shaped valley sections are formed to have a uniform pitch within the range of 100-200 mm.

USUI YUTO (JP)
HATAKEYAMA KODAI (JP)
YAMAZAKI TATSUYA (JP)
SHIBAO YUKIHIRO (JP)

PCT/JP2019/016204

October 22, 2020

April 15, 2019

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FUKUVI CHEMICAL IND CO LTD (JP)
RIKEN KOGYO INC (JP)

E01F15/06; E01F9/608

JP6368449B1	2018-08-01
JPS5460922U	1979-04-27
JP2011208394A	2011-10-20

TOGAWA Koji (JP)

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