| 摘要 |
PURPOSE: To devise a road tack not to be an obstacle for a vehicle and a pedestrian by way of lowering height of the road tack projected from a road surface and not to lower a visible effect from a point near to the road tack. CONSTITUTION: A light transmission body 2 with an inclined luminous face 23 formed on a side face 21 of it and with a plane of incidence 24 low on a back face of the luminous face 23 against the luminous face 23 is installed on an upper part of a tack main body 1. A luminous body 4 is installed toward the plane of incidence 24, and light of the luminous body 4 emitted by an electric power device 5 is injected into the light transmission body 2 from the plane of incidence 24. Injected central light L0 of the luminous body 4 is irradiated from the luminous face 23, another light L reflected inside of the light transmission body 2 is refracted by a light refracting body 3 provided on a lower face 25 of the light transmission body 2 and it is irradiated also from an upper face 22 of the light transmission body 2. |
