JPH05198205A - Street lamp - Google Patents

Abstract

PURPOSE:To adapt the illumination condition of light to various street conditions, and increase the degree of lighting freedom and compatibility for a street lamp by providing a light controller for regulating the illumination angle of light irradiated from an illuminant in the widthwise direction of a street. CONSTITUTION:A street lamp 1 is provided at the predetermined height at one side of a street, and used to illuminate the street in a widthwise forward direction WF and in the widthwise backward direction WB. Also, the lamp 1 illuminates the street in both lengthwise forward and backward directions LF and LB. In the case of a street lamp capable of illuminating a street over the breadth thereof with light from an illuminant 8 at approximately 75 degrees in both WL and WB via a reflector 7 and a housing 5, light leaks to surrounding environment including houses, when the lamp is provided at a narrow street, and the environment is thereby deteriorated. In order to eliminate such a problem, louvers A and B as light controllers 15 are detachably fitted within the end section of the lower opening of the lamp 1. In addition, a pertinent combination of various light controllers is mounted or demounted, including a controller for keeping a WF illumination angle, for example, at 45 degrees, and a WB illumination angle at 20 degrees. The street lamp 1 can be thereby adapted to various road conditions easily.

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 an automobile road, and more particularly to a road light in which light leaking from the light source to the outside of the road is suppressed.

[0002]

2. Description of the Related Art Conventionally, road lights of this type are erected at the center of the road or on the shoulder side to illuminate the road surface radially from the width direction to the longitudinal direction. Various standards are prepared in accordance with various road conditions such as the form and the environment where houses are adjacent to each other, and the flexibility between these standard products is not always good.

[0003]

Therefore, in the conventional road lights, it is necessary to separately prepare various types of road lights conforming to the road conditions, which leads to an increase in the types of road lights and an increase in cost. However, there is a problem that it is not always easy to maintain and manage road lights.

Further, in the conventional road lamp of this type, since the primary reflected light of the top reflecting surface of the reflector that accommodates the light source cannot be emitted to the distance in the longitudinal direction of the road, the road surface directly below the top reflecting surface. While the illuminance is high, the illuminance around it is low, and the problem is that the illuminance is not evenly distributed.

The present invention has been made in consideration of the above-mentioned circumstances, and the irradiation condition of the light from the light source can be easily adapted to various road conditions, the degree of freedom of illumination for the road conditions is high, and the flexibility is high. It aims to provide a large street light.

Another object of the present invention is to provide a road lamp having good illuminance uniformity and brightness on the road surface.

[0007]

A street light according to the present invention is
In order to solve the above-mentioned problem, as described in claim 1, in a road light that accommodates a light source in a reflector and irradiates the road surface of the road with light, the road light is irradiated from the light source in the width direction of the road. A light control body for controlling the irradiation angle of the generated light is provided.

In order to solve the above-mentioned problems, in the road light according to the present invention, as described in claim 2, the light control body emits light at an irradiation angle of light emitted forward in the width direction of the road. And at least one of a second louver for controlling the irradiation angle of light emitted rearward in the width direction of the road. The first and second louvers are detachably provided. Further, as described in claim 3, the light control body is composed of a prism of a globe provided below the light source, and the prism irradiates the light emitted from the light source forward in the width direction of the road. At least one of a first prism for controlling an angle and a second prism for controlling an irradiation angle of light irradiated rearward in the width direction of the road is formed on the globe.

Further, in order to solve the above-mentioned problems, in the road lamp according to the present invention, as described in claim 4, the reflector has the top reflecting surface above the light source and the light from the light source. The side reflection surface is configured to be reflected, and the side reflection surface is configured to irradiate the primary reflection light reflected by the top reflection surface in the longitudinal direction of the road.

[0010]

In the road lamp according to the first aspect of the present invention, since the irradiation angle of the light emitted from the light source in the width direction of the road can be controlled by the light control body, various light irradiation conditions can be set by the light control body. The road conditions can be easily met, the degree of freedom of road lighting can be improved, and flexibility can be provided.

In the road light according to the second aspect of the present invention, since the irradiation angle of the light irradiated to the front and the rear in the width direction of the road can be selectively controlled by the first and second louvers, the number of lanes on the road can be reduced. Thus, it is possible to cope with roads having different widthwise dimensions by simply attaching and detaching the louvers without changing the type of road lights, and the degree of freedom of illumination is improved and flexibility is high. Therefore, it is not necessary to separately prepare various types of road lights that are suitable for various road conditions, so that the cost can be reduced.

Also in the road light according to claim 3, only by selecting the prism formed on the globe, the road lamp according to claim 2
It is possible to achieve the same effects as those of the road light described in.

Further, in the road lamp according to the present invention, the light emitted from the light source to the top reflecting surface of the reflector is primarily reflected from the top reflecting surface toward the side reflecting surface, and further, Since the secondary reflected light reflected by the top reflecting surface is irradiated in the longitudinal direction of the road, the illuminance just below the top reflecting surface of the reflector is reduced, and the illuminance of the surrounding area is improved to improve the illuminance. Uniformity and brightness can be increased.

Further, since a part of the light from the reflector is emitted in the longitudinal direction of the road, by increasing the number of installation pitches of a plurality of road lights installed at a predetermined pitch in the longitudinal direction of the road, the road as a whole can be obtained. It is possible to reduce the number of lamps installed and reduce costs.

[0015]

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

FIG. 1 is a perspective view illustrating a road light according to the present invention. In this figure, the road light 1 is erected at a predetermined height on one side (road shoulder side) of the road 2 and has a width of the road 2. The road surface of the front WF and the rear WB of the direction is illuminated, and the front LF and the rear LB of the longitudinal direction (traveling direction) of the road 2 are illuminated.

The road light 1 is constructed by supporting a road light main body 3 by a pillar 4. The road light main body 3 has, for example, a light box housing 5 in the shape of a square cylinder (box) with a lid, and the lower surface opening of the light box housing 5 is closed by a light-transmitting globe 6. Inside the lamp housing 5,
The reflector 7 having a substantially semi-elliptical shape is incorporated. A light source such as a high-pressure sodium lamp 8 is housed in the reflector 7 along the width direction of the road 2.

As shown in FIG. 2 and FIG. 3, the reflector 7 is densely arranged with a large number of facetted reflecting facets 9, 9 ... is doing. The reflecting surface 10 formed on the inner surface of the reflector 7 is shown in FIG.
It is configured as shown in (A) and (B). Figure 4
In (A), aluminum is vapor-deposited (aluminum vapor-deposited layer 12) on the surface of the reflection material 11, and the reflection surface 10 has a surface smoothness Rmax.
= 0.1μ or less mirror finish.

In FIG. 4B, a mirror surface is formed by vapor-depositing aluminum with a surface smoothness Rmax of 0.1 μ or less on the surface of the reflecting material 11, and then the aluminum vapor-deposited layer 12 is covered with a transparent protective film 13 such as glass coating. The reflective surface 10 is formed by coating with.

As shown in the schematic vertical sectional view of FIG. 5, the top reflective surface 10a of the reflective surface 10 of the reflector 7 has, for example, an axial transverse sectional shape when viewed from the front WF in the width direction of the road 2. It is formed to have an M shape.

Conventionally, since the top reflecting surface is composed of a flat surface, the light from the light source 8 is reflected right under the top reflecting surface, and the illuminance directly under this is raised above the illuminance of the peripheral portion to even the illuminance. Is decreasing. In this road light 1, the top reflection surface 10a is formed in a substantially M shape, so that the light source 8
4, the light from the left and right sides, in other words, the reflecting surfaces 10 of the side surfaces facing each other in the longitudinal directions LF and LB of the road 2.
It is configured to reflect toward b and 10c.

Therefore, it is possible to increase the illuminance of the road surface by irradiating the light incident on the top reflecting surface 10a laterally, that is, in the longitudinal direction of the road 2.

The top reflecting surface 10a does not have to be M-shaped, and may have a shape which reflects the incident light on the upper reflecting surface 10a toward the reflecting surfaces 10b and 10c on the left and right sides thereof. Is not limited.

The reflector 7 directs the light from the light source 8 in the width direction forward (road side) F in the road width direction as shown in FIG.
And the rearward widthwise direction B (on the side of the house, etc.) is irradiated at about 55 °, for example.

This irradiation angle illuminates almost the entire width of the road 2 when the road light 1 is erected at a predetermined height (for example, 10 m) at the center of the road 2 having three lanes on each side. ing.

Therefore, when the road light 1 is applied to a road narrower than the road 2 having three lanes on each side, the illumination light from the road light 1 may leak to the surrounding environment such as a house along the road and harm the environment. is there. Therefore, in order to appropriately adjust the irradiation angle in the road width direction of the road light 1, as shown in FIG. 1, a pair of louvers A and B as a light control body 15 are provided in the opening end of the lower surface of the reflector 7 as shown in FIG. 2 are installed side by side in the width direction and are detachably attached. The first and second louvers A and B for adjusting the irradiation angle of light may be provided in either one of the width directions of the road 2.

The front louver A is set to an angle that controls the light irradiation angle to the front WF in the road width direction to, for example, 45 °, and the rear louver B sets the light irradiation angle to the rear WB in the road width direction to, for example, about 20 °. It is set to an angle that dims to °.

Therefore, according to the size of the road 2 in the widthwise lane direction, a pair of front and rear louvers A and B are appropriately combined and attached or removed to easily meet the road conditions such as the size of the various roads 2 and the environment. It is possible to adapt to, and it is possible to give a great degree of freedom to lighting, and it has wide flexibility. Therefore, it is not necessary to prepare various types of road lights 1 according to the conditions of various roads 2, and the cost can be reduced.

For example, the widthwise dimension of one lane of the road 2 is 3.
When the width of the road shoulder is 5 m and the width of the road shoulder is 2 m, both louvers A and B can be combined according to the width of the road 2 as shown in Table 1 below.

[0030]

[Table 1]

In Table 1, when the road 2 has two lanes on each side, as shown in FIG. 6, when the road lamp 1 is erected at a height of about 10 m on one side of the road 2 with two lanes, Wear a pair of louvers A and B.

In this way, the front W in the road width direction of the louver A is
Since the light irradiation angle of F is 45 °, it is possible to illuminate the road surface of the road 2 having two lanes over substantially the entire width, and by blocking the light for one lane ahead of it, the front WF in the width direction is obtained.
It is possible to prevent light from leaking to houses along the road.

Further, the rear louver B has a road width direction rear WB.
Since the light irradiation angle of is about 20 °, it is possible to illuminate the road shoulder side behind the road light 1 and prevent light from leaking to a house or the like along the road behind the road light 1.

When the road light 1 is erected at a height of about 11 m in the central portion of the road 2 having three lanes on each side (hereinafter referred to as central three lanes), as described above, a pair of front and rear louvers A,
B is unnecessary. Further, in the case of a three-lane arrangement on one side and the opposite lanes are separated, the front louver A is not necessary.

That is, according to the present embodiment, by appropriately combining the pair of front and rear louvers A and B, it is possible to easily cope with the widthwise dimension of the road 2 and road conditions such as the environment.
Since it is not necessary to prepare various road lights 1 according to each road condition, costs associated therewith can be reduced.

Further, since the top reflecting surface 10a of the reflecting surface 10 is formed in a substantially M shape, the light incident on the upper reflecting surface 10a can be reflected to the reflecting surfaces 10b and 10c on the left and right sides thereof. ..

For this reason, the reflecting surfaces 10b on both sides are
It is possible to irradiate the light reflected by 10c to the distance in the longitudinal direction LF, LB of the road 2. Therefore, the installation pitch of the road lights 1 arranged at a predetermined pitch in the longitudinal direction LF, LB of the road 2 can be extended, and the number of the road lights 1 installed can be reduced as a whole, and the cost can be reduced. Can be planned.

Next, another embodiment of the road light according to the present invention will be described.

The road light 1A shown in this embodiment is basically the same as the road light 1 shown in the embodiment except that the structure of the light control body 20 provided in the road light main body 3 is different. Since the configurations are substantially the same, the same members are denoted by the same reference numerals and described.

As shown in FIGS. 7 and 8, the road light 1A has the road light main body 3 attached to the support column 4 by a fastening means such as a fastening bolt nut. The road light body 3 has a box-shaped light body housing 5 with a lid.
An inverted bowl-shaped or semi-elliptical spherical reflector 7 is incorporated therein. A linear light source such as a high pressure sodium lamp 8 is housed in the reflector 7. The high-pressure sodium lamp 8 is mounted in a pressure / vibration resistant socket 22 to which a socket holder 21 is fixed. The socket holder 21 is attached to the lamp housing 5.

Further, the reflector 7 has a reflecting surface 10 formed on the inner surface thereof, and the top reflecting surface 10a of the reflecting surface 10 is constructed as shown in FIG. The top reflecting surface 10a allows light from the light source to be reflected on the side reflecting surfaces (both sides in the longitudinal direction of the road) 10b, 1
The side reflection surfaces 10b and 10c reflect the primary reflection light from the top reflection surface 10a in the longitudinal direction of the road, and the secondary reflection light irradiates the longitudinal direction of the road radially. Is becoming

On the other hand, at the bottom opening of the lamp housing 5,
A light-transmitting globe 6 is provided as an illumination cover so as to be openable and closable. One side of the globe 6 is coupled to the lamp housing 5 with a hinge 24, and the other side is attached with a mounting means such as a trunk clutch or a one-touch joint. , Can be opened.

The globe 6 has a substantially rectangular transparent plate 26 formed of a transparent resin such as acrylic resin or transparent glass, and a sealing means 27 such as a silicon packing having a U-shaped cross section around the entire circumference of the transparent plate 26. Is applied.
The sealing means 27 holds the globe 6 in the lamp housing 5 in a liquid-tight manner.

The transparent plate 26 of the globe 6 is shown in FIG.
The light control bodies 20A, 20B, and 20C are formed by forming as in (A), (B), and (C). The light control body 20A shown in FIG. 9 (A) is one in which a prism 30 is integrally formed by press molding or injection molding on one side of the transparent plate 26, and the irradiation light that flies forward in the width direction of the road is formed by this prism 30. Is a polarized light.

The light control body 20B shown in FIG.
The prism 31 is integrally formed by press molding or injection molding on the other side portion of the transparent plate 26 constituting the above. The prism 31 is adapted to polarize the irradiation light flying backward in the width direction of the road.

Further, the light control unit 20C shown in FIG.
Prisms 30 and 31 are integrally formed on both sides of the transparent plate 26 constituting the globe 6, and both prisms 30 and 31 are formed.
At 31, the irradiation light flying forward and backward in the width direction of the road is polarized.

Each of the light control bodies 20A, 20B and 20C shown in FIGS. 10A to 10C is formed in the same shape and size and is detachably attachable to the lamp body housing 5 and is mutually removable. Compatible. Therefore, the required light control body 20 (20A, 20B, 20C) is selected according to the vehicle width of the road and the mounting position (road shoulder side or center side) of the road light 1A, and the selected light control body 20 is selected. The road lamp 1 </ b> A according to various road conditions can be configured simply by mounting the lamp body housing 5. Even if the road light 1A is configured according to various road conditions, the road light main body 3 can be shared.

When the transparent plate 26 of the globe 6 constituting the light control body 20 is formed in a rectangular flat surface or a curved surface shape having a thickness of, for example, 350 × 375 mm and a thickness of 6 mm, as shown in FIG. 10 and FIG. A prism 30 having a width L of, for example, about 100 mm is formed on one side or the other side (front side or rear side of the transparent plate 26 in the road width direction when the road light 1A is installed). As an optical condition of the prism 30, in one example, the peak pitch P is 4 mm, the prism angle is 45 °, and the riser angle is 16.2 °. By forming the prism 30 (31), the incident light IL and the reflected light O
L is refracted as shown in FIGS. 10 (A), (B), (C) and FIG. 11, and can irradiate light radiated outward in the width direction of the road.

In this case as well, the road light 1A has substantially the same operational effects as those shown in the embodiment. This road light 1
In A, the prism 30, on one side or the other side of the globe 6,
Since the light control body 20 is formed by integrally molding 31, the light control body 20 can be configured by the globe 6 itself.
No separate member is required to form the zero.

In the embodiment of the present invention, the reflector is incorporated in the lamp housing, but the present invention is not limited to this, and the reflector may also serve as the lamp housing.

[0051]

As described above, in the present invention, as described in claim 1, the light control body for controlling the irradiation angle of the light emitted from the light source in the width direction of the road is provided. It is possible to easily adapt to various road conditions such as the widthwise dimension of the road and the road environment, improve the degree of freedom of road illumination, and provide wide flexibility. Therefore, the road lights can be shared by simply selecting the light control body according to various road conditions, and the cost can be reduced.

In the road lamp according to the second aspect of the present invention, since the irradiation angle of the light irradiated to the front and the rear in the width direction of the road can be selectively controlled by the first and second louvers, the number of lanes on the road can be reduced. Thus, it is possible to deal with roads having different widthwise dimensions by simply attaching and detaching the louvers without changing the types of road lights, improving the degree of freedom of illumination and high flexibility. Therefore, it is not necessary to separately prepare road lights suitable for various road conditions, the road lights can be shared, and the cost can be reduced.

Also in the road light according to claim 3, the prism formed on the globe is simply selected, and
It is possible to achieve the same effects as those of the road light described in.

In the road lamp according to the fourth aspect, the light emitted from the light source to the top reflecting surface of the reflector is the primary reflected light reflected from the top reflecting surface to the side reflecting surface. Since the secondary reflected light reflected by the side reflection surface is irradiated in the longitudinal direction of the road, the illuminance just below the top reflection surface of the reflector is reduced, and the illuminance around it is improved to improve the illuminance. The uniformity and brightness of can be increased.

Further, since a part of the light from the reflector is emitted in the longitudinal direction of the road, the number of installation pitches of a plurality of road lights installed at a predetermined pitch in the longitudinal direction of the road is increased so that the road as a whole can be obtained. It is possible to reduce the number of lamps installed and reduce costs.

[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 partially cutaway side view showing an embodiment of a road light according to the present invention.

FIG. 3 is a partially cutaway front view of FIG.

4A and 4B are cross-sectional views showing a partially enlarged view of a reflecting surface of a reflector.

FIG. 5 is a schematic view showing a part of FIG. 3 in a simplified manner.

FIG. 6 is a schematic view when the road lights shown in FIG. 1 and the like are installed on one side of a three-lane road.

FIG. 7 is a side sectional view showing another embodiment of the road light according to the present invention.

FIG. 8 is a view of the road light shown in FIG. 7 as seen from below.

9 is a partially cutaway view of the road light shown in FIG. 7. FIG.

10 (A), (B) and (C) are diagrams showing a light control unit provided in the road light shown in FIG. 7, respectively.

FIG. 11 is a cross-sectional view of a prism formed on a light control body.

12 is a plan view of the prism shown in FIG.

[Explanation of symbols]

 1 Road Light 2 Road 3 Road Light Main Body 7 Reflector 8 Light Source 9 Reflective Facet 10 Reflective Surface 10a Top Reflective Surface 10b, 10c Left Right Reflective Surface 15, 20, 20A, 20B, 20C Light Suppressor 26 Transparent Plate 30, 31 Prism A, B A pair of front and rear louvers

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display area F21V 13/10 2113-3K

Claims (4)

[Claims] 1. A road light for accommodating a light source in a reflector to illuminate a road surface by irradiating the road surface with a light control body for controlling an irradiation angle of light emitted from the light source in a width direction of the road. A street light characterized by being provided. 2. The light control body comprises a first louver for controlling the irradiation angle of light emitted from the light source forward in the width direction of the road, and a first louver for controlling the irradiation angle of light emitted rearward in the width direction of the road. The road lamp according to claim 1, wherein the road lamp is configured to be at least one of two louvers, and the first and second louvers are detachably provided. 3. The light control body is composed of a globe prism provided below the light source, and the prism controls the illumination angle of the light emitted from the light source forward in the width direction of the road.
The road lamp according to claim 1, wherein at least one of the prism and the second prism for controlling an irradiation angle of light irradiated rearward in the width direction of the road is formed on the globe. 4. The reflector is configured to reflect the light from the light source toward the side reflection surface at the top reflection surface above the light source, and the side reflection surface is reflected at the top reflection surface. The road lamp according to claim 1, wherein the primary reflected light is emitted in the longitudinal direction of the road.