JPH06111604A - Street light - Google Patents

Abstract

(57) [Abstract] [Purpose] The light that leaks outside the road is cut to improve the lighting efficiency of the road, and the unevenness of lighting is eliminated by improving the luminous intensity on the road surface in the longitudinal direction of the road to improve the illuminance uniformity of the road surface. To provide good road lights. [Structure] This road light 1 is a road light 1 in which a light source 7 is housed in a reflector 6 to irradiate a road surface with light to illuminate the road surface.
At least the inner side surfaces on both sides of the road in the longitudinal direction of the reflector 6 are mirror-finished to form side reflection surfaces 14, while the linear light sources 7 are arranged in the reflector 6 in parallel with the longitudinal direction of the road. It is a thing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road light for illuminating a road such as a motorway, and particularly to efficiently illuminate only the inside of the road.
The present invention relates to a road light with improved illuminance uniformity on the road surface along the longitudinal direction of the road.

[0002]

2. Description of the Related Art Road lights of this type are erected on the center or one side (road shoulder side) of the road to radiate the road surface of the road radially from the width direction to the longitudinal direction. 200 for street lights
A ~ 250w high pressure sodium lamp is used as a light source and is arranged along a road such as a highway at a required pitch of, for example, about 35m. Various standards have been prepared for the illumination of roads by street lights according to various road conditions such as the number of lanes and the road environment such as the presence or absence of surrounding houses.

In a conventional road lamp, a linear light source of a high-pressure sodium lamp is housed in a reflector having a substantially semi-elliptic spherical shape or an inverted bowl shape so as to extend along the width direction of the road, and direct light or reflected light from this light source is accommodated. It is used to illuminate the road surface radially from the width direction to the longitudinal direction.

[0004]

In the conventional road lamp, the linear light source housed in the reflector is arranged along the width direction of the road and is held parallel to the transverse direction (width direction) of the road. Since it is difficult to control the light leaking outside the road, a lot of light leaks outside the road, and the lighting efficiency of the road tends to be low.

Further, when the linear light source accommodated in the reflector is arranged parallel to the longitudinal direction of the road, light leaking to the outside of the road can be easily cut and the lighting efficiency of the road can be improved. Since the inner surface is formed by subjecting the body to a crease treatment etc., the light from the linear light source cannot be emitted far in the longitudinal direction of the road, improving the luminous intensity of the road surface in the longitudinal direction of the road. Difficult to do. Conventional road lights with linear light sources arranged in the longitudinal direction of the road illuminate the vicinity of the road lights intensively, and it is difficult for the illumination light to reach far in the longitudinal direction of the road. It was difficult to keep a good degree.

The present invention has been made in consideration of the above-mentioned circumstances, and cuts out light leaking to the outside of the road to improve the lighting efficiency of the road, and also improves the luminous intensity of the road surface in the longitudinal direction of the road and uneven lighting. It is an object of the present invention to provide a road light that eliminates the problem and improves the illuminance uniformity of the road surface.

[0007]

A street light according to the present invention comprises:
In order to solve the above-mentioned problem, in a road light according to claim 1, wherein a light source is housed in a reflector to illuminate the road surface of the road with light, the reflector is at least on both sides in the longitudinal direction of the road. While the inner surface of the above is finished to be a mirror surface to form a side reflection surface, a linear light source is arranged in the reflector parallel to the longitudinal direction of the road.

Further, in order to solve the above-mentioned problems, the road lamp according to the present invention has, as described in claim 2, a main body of the road lamp provided on a pillar erected along the road. A linear light source arranged in parallel to the longitudinal direction of the road is housed in a reflector provided in the lamp body, and the reflector cuts light leaking from the linear light source to the outside of the road, and at least both sides in the longitudinal direction of the road. Is formed into a side reflection surface by finishing the inner surface of the above into a mirror surface, and the reflected light is directed so that the side reflection surface irradiates a long-distance road surface in the longitudinal direction of the road. further,
According to a third aspect of the present invention, the reflector is constructed by combining the facets forming the reflecting facets with the reflector.

[0009]

In the road lamp according to the first aspect of the present invention, since the linear light source housed in the reflector is arranged parallel to the longitudinal direction of the road, it becomes easy to control the light leaking to the outside of the road and the lighting efficiency of the road is improved. Can be improved. In addition, since at least the inner surfaces on both sides of the road in the longitudinal direction of the reflector are mirror-finished to form side reflection surfaces, the reflected light from the side reflection surfaces is emitted so as to irradiate the road in the longitudinal direction at a distance, and It is possible to improve the luminous intensity (luminance) of the road surface that is distant in the longitudinal direction, eliminate the uneven illumination, and improve the illuminance uniformity of the road surface.

Also in the road lamp according to the second aspect, since the linear light source arranged in parallel with the longitudinal direction of the road is housed in the reflector provided in the main body of the road lamp, the light leaking out of the road can be easily adjusted. It is possible to improve the lighting efficiency of the road, and at least the inner surfaces on both sides in the longitudinal direction of the road are used as side reflecting surfaces, so that the light reflected from this side reflecting surface is distant in the longitudinal direction of the road. You can fly to. Therefore, it is possible to improve the luminosity (luminance) in the distance in the longitudinal direction of the road, eliminate uneven illumination, and improve the illuminance uniformity of the road surface.

When the reflector is formed by combining facets forming the reflecting facets,
The combination is easy and the degree of freedom of combination is large, and the degree of freedom for forming the reflecting surface formed on the inner surface of the reflector is also large.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a road light according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view illustrating a road light of the present invention. The road light 1 is erected at a predetermined height, for example, a height of 10 m on one side (road shoulder side) of the road 2, illuminates the road surface in the width direction front WF and rear WB of the road 2, and The front LF and the rear LB in the longitudinal direction (traveling direction) are illuminated radially.
Road light 1 is at the required pitch along road 2, for example 35m
Are arranged at the standard pitch interval L.

In the road light 1, the road light main body 3 is supported on the column 4 by tightening means such as tightening bolts and nuts. Road light body 3
As shown in FIG. 3, a box-shaped main body housing 5 is provided, and an inverted bowl-shaped or semi-elliptical spherical reflector 6 is incorporated in the main body housing 5. A linear light source 7 such as a high pressure sodium lamp is housed in the reflector 6 along the longitudinal direction of the road 2. The linear light source 7 is attached to a vibration resistant / pressure resistant socket (not shown).

By arranging the linear light source 7 in parallel with the longitudinal direction of the road 2, the linear light source 7 is arranged in the width direction of the road 2.
Is similar to a point light source. Therefore, it is easy to control the light outward in the width direction of the road 2, and it is possible to improve the irradiation efficiency of the road 2 by cutting off the light leaking to the outside of the road 2.

On the other hand, at the lower surface opening of the main body housing 5,
A light-transmitting globe 8 is provided as an illumination cover so as to be openable and closable. The globe 8 is attached to the body housing 5 so as to be openable and closable by a hinge or the like (not shown). Glove 8
It is formed of a transparent resin such as an acrylic resin or a transparent glass such as a hard glass or a tempered soft glass.

Further, the reflector 6 built in the main body housing 5 is formed as a reflecting surface 10 on almost the entire inner surface. The reflective surface 10 is a facet surface 11 that forms a reflective facet.
It is configured by arranging a number of densely arranged and combining them.
As shown in FIGS. 4 to 7, the reflecting surface 10 includes a top reflecting surface 13 above the linear light source 7, side reflecting surfaces 14 located on both sides in the longitudinal direction of the road 2, and both side portions in the width direction of the road 2. And the side reflection surface 15 located. The reflecting surface 10 directs the light emitted from the light source 7 to the side reflecting surface 14 so as to be reflected rearward in the longitudinal direction of the road 2, while the light emitted to the top reflecting surface 13 and the side reflecting surface 15 is reflected. Once reflected on the side reflection surface 14, the primary reflected light is reflected by the side reflection surface 14.
And is directed to irradiate a long distance in the longitudinal direction of the road 2. That is, the reflector 6 is oriented so as to irradiate the primary reflected light and the secondary reflected light of the light emitted from the linear light source 7 from the side reflection surface 14 to the distance in the longitudinal direction of the road 2.

The reflecting surface 10 of the reflector 6 is constructed as shown in FIGS. 8 (A) and 8 (B). The reflector 6 is the reflector 1
7 is hydraulically formed, the surface thereof is electrolytically polished, and an aluminum vapor deposition layer 18 is formed by alumite treatment (or silica bright treatment) as shown in FIG.
_The reflecting surface 10 is formed by the spectral surface finishing with _max = 0.1 μ or less. As shown in FIG. 8B, a glass coating may be applied on the aluminum vapor deposition layer 18 to form the protective coating 19.

In this road lamp 1, however, the linear light source 7 housed in the reflector 6 is arranged parallel to the longitudinal direction of the road 2, and the reflector 6 has a mirror-finished inner surface. Since the reflecting surface 10 is used, by combining the linear light source 7 and the reflecting surface 10 of the reflector 6, light leaking to the outside of the road 2 can be easily blocked and the length of the road 2 of the linear light source 7 can be increased. By arranging in parallel with the direction, it is possible to secure the luminous intensity in the distance in the longitudinal direction of the road 2 that makes it difficult for light to fly.

The road lamp 1 efficiently irradiates only the inside of the road 2 and, at the same time, irradiates a distant road surface by flying the reflected light from the side reflection surface 14 of the reflector 6 in the distance in the longitudinal direction of the road 2. It is possible to increase the luminosity to eliminate uneven illumination and improve the illuminance uniformity of the road surface due to the illumination.

In the embodiment of the present invention, the reflector is incorporated in the main body casing, but the reflector may also serve as the main body casing.

Further, in the embodiment, the example in which the reflecting surface is formed on the entire inner surface of the reflector is shown. However, the reflecting surface formed on the inner surface of the reflector irradiates light to the far side in the longitudinal direction of the road. Therefore, the entire surface does not necessarily have to be a reflecting surface, and at least the inner surfaces located on both sides in the longitudinal direction of the road may be formed as a reflecting surface.

[0022]

As described above, in the road light according to the present invention, as described in claim 1, the linear light source housed in the reflector is arranged in parallel with the longitudinal direction of the road. It can be handled like a point light source in the width direction of the road, and it is easy to control the light leaking outside the road,
The lighting efficiency of the road can be improved. In addition, since at least the inner surfaces on both sides of the road in the longitudinal direction of the reflector are mirror-finished to form side reflection surfaces, the reflected light from the side reflection surfaces is emitted so as to irradiate the road in the longitudinal direction at a distance, and It is possible to improve the luminous intensity (luminance) of the road surface that is distant in the longitudinal direction, eliminate the uneven illumination, and improve the illuminance uniformity of the road surface.

Also in the road lamp according to the second aspect, since the linear light source arranged parallel to the longitudinal direction of the road is housed in the reflector provided in the main body of the road lamp, the light leaking out of the road can be easily adjusted. It is possible to improve the lighting efficiency of the road, and at least the inner surfaces on both sides in the longitudinal direction of the road are used as side reflecting surfaces, so that the light reflected from this side reflecting surface is distant in the longitudinal direction of the road. You can fly to. Therefore, it is possible to improve the luminosity (luminance) in the distance in the longitudinal direction of the road, eliminate uneven illumination, and improve the illuminance uniformity of the road surface.

When the reflector is formed by combining facet surfaces which form the reflective facets, as described in claim 3,
The combination is easy and the degree of freedom of combination is large, and the degree of freedom for forming the reflecting surface formed on the inner surface of the reflector is also large.

[Brief description of drawings]

FIG. 1 is a perspective view showing an installed state of a road light according to the present invention.

FIG. 2 is a diagram showing an installation state of the road lights.

FIG. 3 is a cross-sectional view showing an embodiment of a road light according to the present invention.

FIG. 4 is a perspective view showing a reflector provided in the road light of the present invention.

5 is a side view of the reflector shown in FIG.

FIG. 6 is a plan view of the reflector shown in FIG.

7 is a rear view of the reflector shown in FIG.

8A and 8B are partial cross-sectional views showing a reflecting surface formed on a reflector.

[Explanation of symbols]

 1 Road Light 2 Road 3 Road Light Main Body 4 Pillar 5 Main Body Housing 6 Reflector 7 Linear Light Source (High Pressure Sodium Lamp) 8 Globe 10 Reflective Surface 11 Facet Surface (Reflective Facet) 13 Top Reflective Surface 14 Side Reflective Surface 15 Side Directional reflective surface 18 Aluminum vapor deposition layer

Claims (3)

[Claims] 1. A road lamp in which a light source is housed in a reflector to irradiate the road surface of the road with light to illuminate the road surface. On the other hand, a linear light source is arranged in the reflector in parallel with the longitudinal direction of the road. 2. A road light main body is provided on a pillar vertically installed along a road, and a linear light source arranged parallel to a longitudinal direction of the road is housed in a reflector provided in the road light main body. The reflector cuts light leaking from the linear light source to the outside of the road, and at least the inner surfaces on both sides in the longitudinal direction of the road are mirror-finished to form side reflecting surfaces, and the side reflecting surfaces form the longitudinal direction of the road. A road lamp characterized by directing reflected light so as to illuminate a distant road surface. 3. The road lamp according to claim 1, wherein the reflector is constructed by combining facet surfaces forming reflective facets.