JPH06111948A - Road lighting - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object to provide a road lighting device capable of controlling a light source which emits light depending on a state of a road surface. [Structure] In a road lighting device 1 comprising a plurality of light sources (light emitters) 81, 82 and a reflector 4 provided corresponding to these light sources (light emitters) 81, 82, The bodies 81 and 82 are switched on and turned on according to the state of the road surface detected by the sensor 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device used for lighting roads.

[0002]

2. Description of the Related Art Conventional road lighting equipment has a large difference in brightness and brightness distribution depending on conditions such as whether the road surface is concrete or asphalt at the initial stage and whether the color is bright or dark. The light distribution design is made in consideration. Then, a single light source (lamp) is mounted in the device, and this light source is only controlled to blink according to the surrounding light and shade.

Therefore, since these appliances have the same light distribution at all times, when the road surface is wet, such as in the case of rain, the brightness uniformity of the road surface is greatly reduced, and it is difficult for the vehicle driver to see the condition of the road and drive safely. There was a problem that I could not do it.

[0004]

The problem to be solved is that the light distribution is always the same regardless of the condition of the road surface. Therefore, an object of the present invention is to eliminate the above-mentioned problems and to provide a device for controlling a light source (lamp) that emits light depending on the condition of the road surface.

[0005]

A road illuminator according to claim 1 of the present invention comprises a plurality of light sources and a reflector provided so as to optically oppose these light sources. In the device, each of the light sources is switched and turned on in accordance with the state of the road surface detected by the sensor.

The road lighting apparatus according to a second aspect of the present invention is characterized in that the plurality of light sources are housed in a common outer tube.

According to a third aspect of the present invention, there is provided a road luminaire, which is below the light source and which controls the light in a direct downward direction.
Is provided, and a second light control louver for controlling light in the front-back direction is supported by the first light control louver.

[0008]

According to the present invention, the sensor detects whether the road surface is dry or wet due to rain or the like, and a light source (lamp) suitable for the condition is turned on to illuminate the road surface with high brightness uniformity.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a road lighting device according to the present invention will be described below with reference to FIGS. In the figure, reference numeral 1 denotes a main body of a lighting fixture. The main body 1 is made of a metal or reinforced plastics (FRP) material that constitutes the upper side of the fixture, and a glass or plastics material that constitutes the lower side. It is composed of a molded transparent globe 3. A concave reflector 4 made of metal or plastics material is provided in the housing 2.
Is provided. A socket base 6 is attached to the base 5 fixed to the housing 2 so as to pass through the reflector 4, and a light source (lamp) 8 is mounted on the socket base 6 in the longitudinal direction, for example, in the traveling direction of a road. It is installed along the.

The light source 8 (lamp) has, for example, a first luminous body 81 and a second luminous body 82 housed in a clear common outer tube 7. These luminous bodies 81,
Reference numeral 82 is a high-intensity discharge lamp such as a metal halide lamp, a high-pressure sodium lamp, or a mercury lamp. The light emitters 81 and 82 are vertically parallel when viewed from the side as shown in FIG. 1, and are arranged so as to cross each other when viewed from the bottom as shown in FIG. The light-emitting body 81 located relatively below is capable of irradiating relatively far along the traveling direction of the road, which is effective when the road surface is dry. The light-emitting body 82 located relatively above is effective for illuminating a relatively short distance and preventing glare when the road surface is wet.

In this embodiment, the two light emitters 8
Both ends of 1, 82 are supported by a disk-shaped support 9 made of metal or ceramics and having a white surface. As a result, it is possible to block the light toward both ends of each of the light emitters 81 and 82 and increase the uniformity of the road surface. That is, the light toward both ends of each of the light emitters 81 and 82 is present to some extent, although it is relatively small. Then, conventionally, this light becomes leaked light to reduce the uniformity. Further, in this embodiment, since both ends of the light emitters 81 and 82 are supported by the support 9, the positional displacement of the light emitters 81 and 82 is prevented even with vibration and the like, and a predetermined light distribution can be obtained. ..

Further, 10 is a sensor for detecting the condition of the road surface attached to the base 5, and 12 is a pole for supporting the main body 1 toward the road.

Next, the lighting of the luminaire having such a configuration will be described. As in the past, when it becomes dusk and the surroundings become dark, or when a timer is activated and power is supplied from the power source to the light source 8 side, the sensor 10 detects the state of the road surface, and it is raining. When it is detected that the road surface is wet, the lighting circuit is switched to the side of the light emitter 81 to turn on the light emitter 81 as shown in FIG. 3, and no power is supplied to the light emitter 82. 82 does not light.

Contrary to the above, when the road surface is dry and the weather is dry, the lighting circuit is switched to the light emitting body 82 side to light the light emitting body 82, and no power is supplied to the light emitting body 81, so that the light emitting body 81 is not supplied.
Does not light. Then, when rain or the like starts to fall with the light emitting body 82 turned on and the road surface gets wet, this is detected by the sensor 1.
0 is detected and the light emitting body 81 is switched to the light emitting body 81 side,
The light emitter 82 is turned off.

In FIG. 3, e is an AC power source and B is a ballast. Further, FIG. 3 shows the concept, and although it is simplified, it can be easily embodied by those skilled in the art, and further various modifications can be easily made.

In the present invention, the light emitting bodies 81 and 82 are switched and turned on by the sensor 10 detecting the dry / wet condition of the road surface as described above, so that the driver of the vehicle can easily see the condition of the road surface and the accident. Can be prevented.

Further, in the light source 8 of the embodiment structure, the two light emitters 81 and 82 are sealed in the same outer tube 7. Therefore, the outer tube is reduced by one and the two light emitters 81 and 82 are placed close to each other. Since it can be arranged in such a manner, there is an advantage that the design of the reflection plate 4 with respect to the light source becomes easy.

FIGS. 4 and 5 show another embodiment of the present invention, in which the same parts as those in FIGS. 1 and 2 are designated by the same reference numerals and the description thereof is omitted. 4 and 5, a vertical louver 13 serving as a first light control body which also serves as a frame along the longitudinal axis direction of the light emitting bodies 81 and 82 is provided below the light emitting bodies 81 and 82, and is orthogonal to the vertical louver 13. In addition, the horizontal louvers 14 as a plurality of second light control members supported by the vertical louvers 13 penetrating the vertical louvers 13.
, 14y, 14z are provided.

.., 14y, 14z are provided with a white reflecting surface, a black light shielding surface, or a light absorbing surface.

The luminaire main body 1 includes, for example, a light emitter 8
Direct rays A incident from the light sources (lamps) 81 and 82 on the left and right surfaces 13L and 13R of the vertical louver 13 are arranged such that the longitudinal axis directions of the reference numerals 1, 82 are orthogonal to the traveling direction of the road.
1 is reflected like rays A2 and A3, and is radiated forward and backward in the traveling direction of the road. Further, the horizontal louver is attached so as to be tiltable so as to reflect light in a desired direction. For example, the reflected light of the light beam B1 incident on the horizontal louver 14a is radiated almost directly below the light beam B2 and is incident on the horizontal louver 14y. C
The reflected light of No. 1 is emitted in the direction of the ray C2.

In the instrument 1 having such a configuration, either one of the light emitters 81 and 82 is turned on according to the condition of the road surface, and the light rays from the light emitters 81 and 82 are emitted from the vertical louvers 13 and the horizontal louvers 14a, ..., 14y, 14z emits light in a desired direction. For example, the vertical louver 13 lowers the light intensity directly below the device 1 and directs that amount forward and backward in the direction of road travel, and the horizontal louvers 14a, ..., 14y, 14z adjust the light distribution to the road side and shoulder side. It is possible to obtain a desired luminous intensity and light distribution.

If the outer surfaces of the lateral louvers 14a and 14z on the end side are blackened, the undesired light rays reflected from the reflector 4 and the socket base 6 can be blocked.

In this embodiment, the number of light sources is not necessarily plural.

The present invention is not limited to the above-described embodiments, and for example, the light sources are not limited to those in which the same outer tube is supported and sealed by a disc-shaped support, and each light source is an outer tube. Or a light source having no outer tube. Further, the arrangement of the light sources (lamps) is not limited to the parallel arrangement, and the light sources (lamps) may be vertically crossed in an X shape or a cross shape. Further, different types of light sources may be used.

Further, in the above-mentioned embodiment, the case where two light sources are used to cope with two kinds of road surface states has been described, but the number of light sources is not limited to two, and two or more light sources may be turned on at the same time. Alternatively, the blinking may be switched on and turned on without turning off one light source. Further, it is of course possible to support two or more types of road surface conditions so as to cope with other road surface conditions such as snowfall. Further, the sensor is not limited to the one that detects the state of the road surface, but may be one that detects rain or snow, and the detection may be continuous or intermittent.

[0026]

As described above in detail, according to the present invention, the light source is switched and turned on by the sensor detecting the condition of the road surface, so that the driver of the vehicle can see the condition of the road surface well. This will improve the property and prevent the occurrence of traffic accidents. Also, since a plurality of light sources are used, it is possible to prolong the replacement time of the light sources, and even if one of the light sources reaches the end of its life and becomes defective, it can be temporarily turned on instead. It is safe without any defects.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a road lighting device showing an embodiment of the present invention.

FIG. 2 is a bottom view showing a part of FIG. 1 by cutting away.

FIG. 3 is a simplified circuit diagram showing a lighting control example of FIGS. 1 and 2.

FIG. 4 is a cross-sectional side view of a main part of a road lighting device showing another embodiment of the present invention.

5 is a sectional front view of FIG.

[Explanation of symbols]

1 ... Road lighting equipment, 4 ... Reflector, 8 ... Light source, 81, 8
2 ... Light-emitting body 10 ... Sensor, 13 ... Vertical louver, 14a-14b ... Horizontal louver

Claims (3)

[Claims] 1. A plurality of light sources and a reflector provided so as to optically oppose these light sources, wherein each of the light sources is switched and turned on in accordance with a road surface state detected by a sensor. Lighting equipment for roads. 2. The road lighting apparatus according to claim 1, wherein the plurality of light sources are housed in a common outer tube. 3. A first louver for light control is provided below the light source to control light in a direct downward direction, and the louver for first light control controls light in the front-rear direction. The road lighting device according to claim 1 or 2, wherein a second light control louver is supported.