JPH0113165B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a road lighting device that limits light toward the shoulder of a road and improves the illumination rate within the road surface.

[Technical background of the invention and its problems]

Conventional road lighting devices of this type include, for example, Publication of Utility Model Publication No. 36-6273, Publication of Publication of Utility Model Publication No. 36-8981,
As shown in Japanese Utility Model Publication No. 36-8984, a boat-shaped globe is provided in a housing-like body with an opening on the bottom surface, and a reflector is provided inside the globe, or a prism is provided in the globe to direct light toward the road shoulder. limit,
We are trying to improve the lighting rate on the road surface.

However, these devices require a boat-shaped glove, which is equipped with a reflector or prism, making the device large, heavy, and difficult to handle, as well as expensive. There are drawbacks.

Moreover, these devices have the disadvantage that light distribution is mainly controlled by the globe, and light is controlled by a reflector or prism provided inside the globe, resulting in a large amount of light loss.

[Object of the Invention] An object of the present invention is to provide a road illumination device that is compact and lightweight, and in which light distribution is controlled within the casing-like main body to reduce light loss.

[Summary of the invention]

The present invention provides a plurality of triangular prism-shaped reflective surfaces along the vertical direction on one inner surface of one side of a casing-like body housing a lamp, and a flat transparent cover is provided on the lower surface light projection opening of the casing-like body. The present invention is characterized in that a control section is provided near the other side of the casing-like body of the translucent cover, and controls the distribution of light from the lamp downward across the translucent cover.

[Embodiments of the invention]

The details of the invention will be explained with reference to the illustrated embodiments. 1 and 2 show a first embodiment,
Reference numeral 1 denotes a housing-like main body, which has a light projection opening 2 on its lower surface and a reflective surface 20 on its inner surface, and can be formed to be attached to a support (not shown). Reference numeral 3 denotes a triangular prism-shaped reflective surface provided within one side of the housing body 1, and this triangular prism-shaped reflective surface 3 is provided on both sides along the vertical direction within one side of the housing body 1 located on the road surface side. It is formed of a plurality of triangular prism-shaped portions 5 formed as substantially symmetrical inclined surfaces 4, 4. The triangular prism-shaped reflective surface 3 may be formed by bending an aluminum plate into a sawtooth shape, for example, or may be formed integrally with one side of the housing body 1 so as to protrude therefrom. 6 is a lamp,
This lamp 6 is attached to a socket 7 disposed within the casing-like main body 1 and housed within the casing-like main body 1. Reference numeral 8 denotes a light-transmitting cover, and the light-transmitting cover 8 is a transparent cover having a flat plate shape, and is disposed to cover the light projection opening 2 of the casing-like main body 1. Reference numeral 9 denotes a control section, and this control section 9 is provided on the translucent cover 8 located on the other side of the main body 1, that is, near the roadside, so as to cross the translucent cover 8, and controls the light from the lamp 6. Light distribution is controlled downward. In this example,
The control section 9 is formed of a prism 10 provided near one end of the translucent cover 8. This prism 1
0 may be formed integrally with the translucent cover 8 in a plurality of pieces extending outwardly, for example, across the translucent cover 8.

Next, the effect will be explained. By lighting the lamp 6, direct light and reflected light from the reflective surface are emitted from the light projection opening 2 through the translucent cover 8. At this time, the light directed toward the inner surface of one side of the housing body 1 is reflected by the inclined surface 4 of the triangular prism-shaped reflective surface 3, and is dispersed diagonally, that is, in the traveling direction of the road surface. Therefore, light directed toward the inner surface of one side of the housing body 1 is less likely to be directed toward the road shoulder, and light distribution can be controlled favorably. Furthermore, the light traveling from the lamp 6 toward the other side of the casing body 1 is refracted by the prism 10 of the control section 9, so that it is less likely to be directed downward and toward the road shoulder, and light distribution can be controlled favorably. Furthermore, since the light distribution is controlled within the housing body 1, light loss is reduced and the illumination rate is improved.

Although the present invention has been described with reference to the above embodiments,
The present invention is not limited to this.

For example, as shown in FIG. 3, the control unit 9 connects a plurality of looper pieces 13, each of which has a specular reflection surface 11 on one side and a light absorption surface, e.g., a black surface 12, on one side with the specular reflection surface 11 facing the triangular prism reflection surface 3. The light-transmitting cover 8 may be spaced apart from the inner surface of the light-transmitting cover 8 located near the other side of the casing-like main body 1 so as to cross the light-transmitting cover 8. Even in this case, the light from the lamp 6 toward the other side of the casing body 1 is reflected by the specular reflection surface 11 of the looper piece 13 and directed downward, and is less likely to be directed toward the road shoulder, allowing for good light distribution control. Note that the same parts as in the first embodiment are given the same reference numerals, and the description thereof will be omitted. In addition, a lamp 6 is provided on the top side of the housing body 1.
A reflective plate may be provided to surround the. Furthermore, the triangular prism-shaped reflective surface may be formed into a rough uneven surface. Furthermore, the prism 10 of the control section 9 may be provided on the inner surface of the translucent cover.

〔Effect of the invention〕

The present invention provides a plurality of triangular prism-shaped reflective surfaces along the vertical direction on one inner surface of a casing-like body housing a lamp, and a flat light-transmitting cover provided on the bottom light projection opening of the casing-like body, A control section is provided near the other side of the casing-like body of the light-transmitting cover, and controls the distribution of light from the lamp downward across the light-transmitting cover, so that it is directed toward the road shoulder. It is possible to satisfactorily limit the light of the vehicle and increase the amount of light irradiated onto the road surface. Furthermore, since the light distribution is controlled within the casing-like main body, light loss is reduced and the illumination rate is improved. Further, since the light emitting opening of the casing-like main body is covered with a flat light-transmitting cover and there is no downward protrusion, it can be formed to be small and lightweight, inexpensive, and easy to handle.

[Brief explanation of drawings]

1 and 2 show a first embodiment of the road lighting device of the present invention, FIG. 1 is a side sectional view, FIG. 2 is a partially cutaway bottom view, and FIG. FIG. 3 is a side sectional view of a second embodiment of the road lighting device. DESCRIPTION OF SYMBOLS 1... Housing-shaped main body, 2... Light emitting opening, 6... Lamp, 3... Triangular prism-shaped reflective surface, 4, 4... Inclined surface,
8... Translucent cover, 9... Control unit.

Claims (1)

[Scope of Claims] 1. A housing-like body having a light emitting opening on the lower surface, a lamp housed in the housing-like body, and a lamp that is substantially symmetrical on both sides along the vertical direction on one inner surface of the housing body. A plurality of triangular prism-shaped reflective surfaces formed as inclined surfaces, a light-transmitting cover having a flat plate shape and covering the light emitting opening, and a light-transmitting cover located near the other side of the casing-like body are transparent. A road lighting device, comprising: a control section that is provided across the optical cover and controls the distribution of light downward from the lamp. 2. The road lighting device according to claim 1, wherein the housing-like main body has an inner surface formed of a reflective surface. 3. The road lighting device according to claim 1, wherein the control section is a prism formed integrally with the translucent cover. 4. Claims characterized in that the control unit is formed of a plurality of louver pieces having one surface as a specular reflection surface and the other surface as a light convergence surface, and are spaced apart with the reflection surface facing the triangular prism reflection surface side. 1. The road lighting equipment described in 1.