JPH07272508A - Luminaire for road and lighting system for road - Google Patents

Abstract

PURPOSE:To control the distribution of light without illumination irregularity by providing an auxiliary reflector on an extension line on the base side connecting a luminous tube and the transparent light transmission part of an exclusure. CONSTITUTION:A light body 1 is provided with an auxiliary reflector 15 on an extension line on the base side connecting a luminous tube 8 and the transparent light transmissive part 11 of an enclusure 9. The reflector 15 is formed by bending a plate material into a nearly U-shape, with the middle fastened together with a socket 5 and fixed to a socket board 6. The reflector 15 reflects light directly injected from the luminous tube 8 with a high brightness and a strong directivity and illuminates a desired area. Illumination decrease in the cross direction of a road at the center between road lighting systems is covered, illumination irregularity in this area is reduced and desired illumination on the road is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road lighting device for irradiating a road surface such as a sidewalk or a roadway, and a road lighting device having the road lighting device mounted on a support such as a support.

[0002]

2. Description of the Related Art For example, Japanese Patent Publication No.
No. 28002. This road luminaire has a structure in which a diffuse reflection type light source such as a fluorescent high pressure mercury lamp is housed inside a reflector covered with a prism globe. The advantage of using a diffused light source is that diffused light makes it difficult to feel clare, does not impair the visual environment on the road surface, and when controlling the light distribution with a reflector and prism globe, at the design and manufacturing level. Even if there is some variation in the accuracy of, the influence on the light distribution performance is small and the manufacturing is easy.

Further, the road lighting equipment is arranged at a predetermined interval along the road. The distance depends on the angle at which the maximum luminous intensity of the light distribution of the lighting equipment is obtained and the height of the lamp body. It is general that the fixed and adjacent road lighting devices are arranged so that the angles at which the maximum luminous intensity of both are obtained intersect with each other.

[0004]

However, since the light distribution of such a road lighting device is not rectangular, the illuminance becomes uneven in the width direction of the road. In particular, since the illuminance becomes low at the central position between the adjacent road lighting devices, the uneven illuminance appears remarkably.

Further, since roads have different road widths, curve degrees, lighting conditions, etc. depending on installation locations, uniform light distribution cannot be determined. If a reflector or prism cover that meets such conditions is designed each time, the cost of the equipment will increase. Further, if the arrangement interval of the road lighting devices is shortened in order to eliminate the uneven illuminance, the number of lighting devices per road length increases, which increases the facility cost. The present invention solves such a problem, and an object of the present invention is to provide a road lighting device and a road lighting device capable of controlling light distribution so as to prevent uneven illumination while suppressing costs.

[0006]

According to a first aspect of the present invention, there is provided a road lighting device including a light emitting tube, a tube wall including the light emitting tube near the base as a transparent light transmitting portion, and a tube wall other than the light emitting portion as a diffuse light transmitting portion. A single base lamp having the formed envelope, a socket for mounting the single base lamp, and a main reflector arranged to face the single base lamp are arranged, and a light projecting opening is formed below. Of the lamp body and the line connecting the light emitting tube and the transparent light transmitting portion of the envelope so that the emitted light that has passed through the transparent light transmitting portion from the light emitting tube of this single-ended lamp is reflected outward from the light projecting opening. An auxiliary reflector provided on an extension line on the base side is provided.

According to a second aspect of the present invention, there is provided the road lighting fixture according to the first aspect, wherein the auxiliary reflector of the road lighting fixture according to the first aspect is attached to the socket base together with the socket.

According to a third aspect of the present invention, there is provided the road lighting device according to the first or second aspect, wherein the auxiliary reflector of the road lighting device emits light transmitted from the arc tube through the transparent transparent portion outside the irradiation range of the main reflector. It is characterized in that the light is reflected so as to illuminate the range.

A road illumination device according to a fourth aspect of the present invention has a pillar that is erected on a road surface, a lamp body mounting portion that is provided above the pillar, and includes a ballast. It is characterized in that the above described road certifying device is attached to the lamp body mounting portion.

[0010]

According to the road lighting apparatus of the present invention, the auxiliary reflector is surrounded by the arc tube so that the light emitted from the arc tube of the single-ended lamp through the transparent transparent portion is reflected outward from the projection opening. Since it was provided on the extension side of the mouthpiece side of the line connecting with the transparent transparent part of the vessel,
By reflecting direct light having high brightness and high directivity, a desired range is irradiated to compensate for the illuminance, uneven illuminance is reduced, or an illuminance in the desired range is obtained.

According to the road lighting apparatus of the second aspect, in addition to the function of the road lighting apparatus of the first aspect, the auxiliary reflector is attached to the socket base together with the socket.

According to a third aspect of the present invention, in addition to the operation of the first or second aspect of the present invention, the auxiliary reflector mainly reflects the light emitted from the arc tube and transmitted through the transparent transparent portion. Since the light is reflected so as to irradiate a range outside the body irradiation range, uneven illuminance between adjacent road lighting devices is reduced.

The road illumination device according to a fourth aspect of the present invention includes a ballast in a lamp body mounting portion provided above the pillar.
Since the road certification device described in any one was installed,
By reflecting direct light having high brightness and high directivity, a desired range is irradiated to compensate for the illuminance, uneven illuminance is reduced, or an illuminance in the desired range is obtained.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.

A lamp body 1 of a road lighting fixture is attached to a lamp body mounting portion 3 of a column 2 standing upright on the side of a road surface to form a road lighting device. A single-base lamp 4 such as a diffusion high-pressure mercury lamp is attached to the inside of the lamp body 1 at an angle so that the optical axis is oblique to a socket 5 to which a socket base 6 is attached. The single-base lamp 4 has an arc tube 8 and an envelope 9 that encloses the arc tube 8. The envelope 9 is formed with a bulging portion substantially facing the arc tube 8 and a diffuse light-transmitting portion 10 having a tube wall on the front end side subjected to a surface diffusion treatment such as frost treatment, and the tube wall on the base side is transparent. It is formed as the transparent portion 11. Reference numeral 7 denotes a main reflector disposed so as to face the single-base lamp 4, and is disposed above the lamp body 1 so as to emit reflected light from the light projecting opening 12. The main reflector 7 reflects the light emitted from the single-ended base lamp 4, but the reflection angle is designed so as to illuminate the point A where the maximum luminosities of the adjacent road lighting fixtures intersect. Globe 13 at the light emitting opening 12
It is also possible to form a prism according to the need of controlling the light distribution. Reference numeral 14 is a ballast for lighting the single-base lamp 4 built in the lamp body 1.

As shown in FIG. 3, since the light distribution of the road lighting device is not exactly rectangular, at the points B, B'in the width direction of the road at the center position between the adjacent road lighting devices, The illuminance becomes uneven. In order to obtain the illuminance at the points B and B ′, the auxiliary reflector 15 is arranged in the lamp body 1. The auxiliary reflector 15 is provided on an extension line of the base side of a line connecting the arc tube 8 and the transparent light transmitting portion 11 of the envelope 9. The auxiliary reflector 15 is formed by bending a plate material such as an aluminum plate into a substantially U shape and fixing the intermediate portion together with the socket 5 to the socket base 6. The bent shape of the auxiliary reflector 15 may be appropriately designed so as to irradiate a desired portion.

Next, the operation of this embodiment will be described. The auxiliary reflector 15 reflects direct light from the arc tube 8 having high brightness and high directivity, and irradiates a desired range. In the present embodiment, it is possible to compensate for the decrease in the illuminance at the points B and B ′ in the width direction of the road at the central position between the road lighting devices, reduce the uneven illuminance at this portion, and obtain the desired illuminance on the road. . The auxiliary reflector 15 does not have to illuminate the central position between the road lighting devices as in the present embodiment, and the reflector is designed so as to irradiate the spot around the pillar of the lighting device where illuminance is required. It may be one. Further, the auxiliary reflector may be integrated with the main reflector 7.

[0018]

According to the first aspect of the present invention, there is provided a road lighting device, wherein the auxiliary reflector is an arc tube so that the emitted light transmitted from the arc tube of the single-ended lamp to the transparent transparent portion is reflected outward from the projection opening. Since it was provided on the extension side of the base side of the line connecting to the transparent light-transmitting part of the envelope, it reflects the direct light with high brightness and strong directivity without wasting it to illuminate the desired range and compensate for the illuminance. The unevenness can be reduced or an illuminance in a desired range can be obtained, and the light distribution can be efficiently controlled while suppressing the cost so as to eliminate the uneven illuminance.

In addition to the effect of the road lighting device of the first aspect, the road lighting device of the second aspect is easy to manufacture because the auxiliary reflector is attached to the socket base together with the socket.

In addition to the effect of the road lighting device according to claim 1 or 2, the road lighting device according to claim 3 is such that the auxiliary reflector mainly reflects the emitted light transmitted from the arc tube through the transparent light-transmitting portion. Since it reflects so as to illuminate a range outside the body's irradiation range, uneven illuminance between adjacent road lighting fixtures is reduced,
The visual environment on the road is improved.

The road lighting device according to claim 4 further includes a ballast in a lamp body mounting portion provided above the pillar.
Since the road certification device described in any one was installed,
By illuminating a desired range by reflecting direct light with high brightness and strong directivity, the illuminance can be supplemented, unevenness in illuminance can be reduced, or illuminance in the desired range can be obtained. It is possible to efficiently control the light distribution so that there is no light.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a road lighting device according to an embodiment of the present invention.

FIG. 2 is a front view showing a road lighting device according to an embodiment of the present invention.

FIG. 3 is a conceptual diagram showing a light distribution characteristic of the road lighting device of the present invention.

[Explanation of symbols]

1 ... Lamp body, 2 ... Struts, 3 ... Lamp body mounting portion, 4
... single-ended lamp, 5 ... socket, 6 ... socket base, 7 ... main reflector, 8 ... arc tube, 9 ...
Envelope, 10 ... Diffuse translucent part, 11 ... Transparent translucent part, 12 ... Projecting aperture, 14 ... Stabilizer, 15 ...
-Auxiliary reflector.

Claims (4)

[Claims] 1. A single-ended lamp having an arc tube, a tube wall including the arc tube in the vicinity of a base as a transparent light-transmitting portion, and an envelope in which the other tube wall is formed as a diffusion light-transmitting portion; A lamp body having a socket for mounting the single-base lamp and a main reflector arranged to face the single-base lamp and forming a light projecting opening below; An auxiliary reflector provided on the base side extension line of a line connecting the arc tube and the transparent light-transmitting portion of the envelope so that the outgoing light transmitted through the light-transmitting portion is reflected outward from the light projecting opening. A road lighting device characterized by being provided. 2. The road lighting apparatus according to claim 1, wherein the auxiliary reflector is attached to the socket base together with the socket. 3. The auxiliary reflector reflects the emitted light transmitted from the arc tube through the transparent light-transmitting portion so as to illuminate a range outside the range of irradiation of the main reflector. Road lighting equipment. 4. A ballast having a supporter standing on a road surface, a lamp body mounting portion provided above the supporter, and including a ballast.
3. A road lighting device, wherein the road certifying device according to any one of 1 to 3 is attached to a lamp body mounting portion.