JP4331377B2 - Roadside illumination device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a roadside illumination device that is installed on a side of a road and illuminates the roadside.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, roadway lighting devices and line-of-sight guidance lights are known as lighting devices installed on expressways and the like for the purpose of ensuring safety during night driving. Roadway lighting devices, particularly roadway lighting devices installed in railings, are required to continuously illuminate the roadway. In addition, the illuminance is regulated within a certain range for roadway illumination. The line-of-sight guide lamp is for displaying the alignment of a curved road in a dotted or linear shape, and is not intended for road illumination.
[0003]
[Problems to be solved by the invention]
As described above, the conventional lighting device for a roadway installed in a railing is required to continuously illuminate the roadway, so that the number of installations is large and the power consumption is large. there were. In addition, since it is mainly roadway illumination, there is also a problem that it is difficult to distinguish the shoulder from the roadway. The line-of-sight guide light is not intended to illuminate the road surface but to recognize the alignment of the direction of travel of the roadway, so there is a problem that it is difficult to distinguish structures on the side of the road and road shoulders and roadways. .
[0004]
Therefore, recently, there is a demand for the installation of a roadside illumination device that can easily distinguish a roadside structure or a roadside from a roadway. In addition, such a roadside illumination device is invisible or uncomfortable for the driver when light from a high-luminance light source or reflector enters the driver's field of view (such as this) Therefore, no glare is required.
[0005]
The present invention has been made to meet the above-described conventional problems and demands. The object of the present invention is to illuminate the road side structure and roadside well with low power consumption, and to provide a line-of-sight guidance function. It is another object of the present invention to provide a roadside shoulder illumination device that can prevent glare.
[0006]
In order to achieve the above object, a first invention is a road shoulder illumination device that is disposed on a side of a road to illuminate a road shoulder, and includes a light source disposed in a housing, and a front opening of the housing. A plurality of louvers arranged side by side in the direction of travel of the vehicle, and a reflector that reflects light emitted from the light source forward and guides the light to the louver. Inclined in the running direction with respect to an orthogonal vertical plane and arranged so that the front end edge is in front of the rear end edge in the running direction, and the louver interval is set to be at least in contact with the front of the housing. It is.
[0007]
According to a second invention, in the first invention, the surface of the louver is formed on a white diffusing surface, and a black matte coating is applied to the back surface.
[0008]
In the present invention, when the light emitted from the light source passes through the gap between the louvers, the light is directed obliquely downward in the traveling direction of the vehicle according to the inclination angle of the louvers to illuminate the road surface of the road shoulder. As a result, the illumination area has a trapezoidal shape with sharp corners in the traveling direction, and exhibits a gaze guidance effect. Since the louver is disposed so as to be in contact with at least when viewed from the front, the driver does not visually recognize the light source or the reflection plate inside the casing, so that no glare occurs. Moreover, since the surface of the louver is formed as a white diffusing surface, light does not reach the roadway and light is suppressed. Here, the surface of the louver is the surface that matches the traveling direction of the vehicle, and the back surface is the surface opposite to the traveling direction, and the black back surface can be seen from the front.
[0009]
Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
1 is a front view showing an embodiment of a roadside shoulder lighting device according to the present invention, FIG. 2 is a plan view of the lighting device, FIG. 3 is an enlarged side view showing a part of the lighting device in a cutaway state, and FIG. 4 is a perspective view of the louver, and FIGS. 5A and 5B are views showing roadside illumination.
[0010]
In FIG. 5, a road 1 on which an automobile travels has a separation band 2 in the center, a lane on one side consists of a roadway 3 and a shoulder 4, and a structure 5 made of concrete or the like is constructed on the side. A rectangular storage groove 6 that is long in the traveling direction of the vehicle is formed on the inner surface of the structure 5, and a road shoulder illumination device 7 is incorporated in the storage groove 6. The installation height of the roadside illumination device 7 is set to be not more than the eye level (about 1.2 m) of the driver who is driving a normal passenger car.
[0011]
1 to 4, the roadside shoulder illumination device 7 includes a horizontally long casing 11 formed of a metal plate such as SUS304 and a front frame that covers the front opening 12 of the casing 11 in a watertight manner. 13, a light source 14, a louver 15 that controls an irradiation direction of the light source 14, a reflector 16, a terminal block 17, a ballast 18, and the like are accommodated in the housing 11. The front frame 13 is formed of SUS304 or the like in the same manner as the housing 11, and the upper end is pivotably attached to the front upper end of the housing 11 by a plurality of hinges 19, and the lower end is housing by a plurality of fastening bolts 20. Usually fixed to the lower front of the body 11. An opening 21 is formed at the center of the front frame 13, and the opening 21 is covered with a transparent glass plate (tempered glass) 22. The size of the opening 21 is about 1158 mm in length and about 130 mm in height.
[0012]
The light source 14 is composed of a straight tube fluorescent lamp (32 W), and is disposed above the interior of the housing 11 so as to be positioned above the louver 15. The light source color is white or neutral white.
[0013]
The louver 15 is made of a thin rectangular metal plate such as aluminum, and is arranged in parallel in the longitudinal direction of the housing 11 with a fixed interval, and the upper and lower ends of the front end are fixed to the mounting plates 24A and 24B, respectively. . The louver 15 is disposed so as to be inclined with respect to two horizontal and vertical directions in order to control light distribution from the light source 14 obliquely downward in the traveling direction of the automobile. Specifically, it is inclined so as to intersect with a horizontal line HL (FIG. 4) orthogonal to the traveling direction of the automobile at an angle α and to intersect with a vertical plane VP orthogonal to the traveling direction at an angle θ. For this reason, the front end edge 15a of the louver 15 is located in front of the rear end edge 15b in the traveling direction, and when the road shoulder illumination device 7 is viewed from the front, the back surface (surface on the rear side in the traveling direction) 15d of the louver 15 is the glass. Visible through the plate 22. A surface (front surface in the traveling direction) 15c of the louver 15 is formed with a white matte coating to form a diffusion surface, and the back surface is black matted. The arrangement pitch of the louvers 15 is set such that adjacent louvers come into contact with each other when viewed from the front, and the inside of the housing cannot be visually recognized through the louvers 15. Here, in the present embodiment, the horizontal angle α is 45 ° and the vertical angle θ is 40 °, but the angle is not particularly limited and can be changed as appropriate.
[0014]
The mounting plates 24 </ b> A and 24 </ b> B are each formed in an L shape, and both end portions thereof are connected by connecting plates 25, and are fixed above and below the front opening 12 of the housing 11.
[0015]
The reflection plate 16 is disposed above the light source 14 and reflects the light from the light source 14 downward. The reflection plate 16 is disposed behind the louver 15, and the direct light and the first reflection from the light source 14. The second reflecting plate 16B reflects the reflected light reflected by the plate 16A forward. The first reflecting plate 16A has a trapezoidal shape when viewed from the side with an aluminum plate, and the reflecting surface (lower surface) is mirror-finished. The second reflecting plate 16B is made of an aluminum plate that is curved so that the front surface is a gently concave curved surface, and the reflecting surface (front surface) is mirror-finished.
[0016]
In such a roadside illumination device 7, a part of the light emitted from the light source 14 is directly transmitted through the glass plate 22, the other part is directly reflected on the front and back surfaces of the louver 15, and the rest is the first. The light hits the front and back surfaces of the louver 15 after being reflected by the first and second reflecting plates 16 </ b> A and 16 </ b> B, and is reflected and absorbed, whereby the light substantially parallel to the louver 15 is transmitted through the glass plate 22. In this case, since the louver 15 is inclined with respect to the two horizontal and vertical directions as described above, the light from the light source 14 is directed obliquely downward in the traveling direction of the automobile, and the lighting device 7 is installed. The lower road shoulder 4 is well illuminated. As shown in FIG. 5A, the illumination area 30 of the road shoulder 4 has a sharp trapezoidal shape with a roadway side corner portion 30a in the traveling direction, and the corner portion 30a indicates the traveling direction, and the surface 15c of the louver 15 Is formed on a white diffusing surface, and diffuses light from the light source 14 to convert it into soft light. Therefore, it suppresses the light from reaching the roadway and illuminates the road shoulder, thereby exhibiting a visual line guiding effect. . Further, since the louvers 15 are arranged so as to be at least in contact with each other when viewed from the front, the light source 14 and the reflecting plate 16 inside the housing are not directly recognized, and glare is prevented without giving glare to the driver. can do. Furthermore, since the black back surface 15d can be seen from the front and the front surface 15c cannot be seen, there is no feeling of glare.
[0017]
In the above-described embodiment, the concrete wall is shown as the structure 5 provided on the side portion of the road 1, but the present invention is not limited to this and may be a rail. .
[0018]
【The invention's effect】
As described above, the roadside shoulder illumination device according to the present invention tilts the louver in the traveling direction with respect to a vertical plane orthogonal to the traveling direction of the vehicle, and tilts so that the front edge is ahead of the rear edge in the traveling direction. Since the light from the light source is configured to be guided obliquely downward in the traveling direction of the road, the road shoulder can be well illuminated and easily distinguished from the roadway. In the case of roadside illumination, the standard (particularly illuminance) in the case of roadway illumination is not applied, so that a lighting device with low power consumption can be obtained, and the maintenance cost is low. Further, by guiding the light from the light source obliquely downward to the road traveling direction, the illumination area can be formed into a trapezoidal shape with a sharp corner at the roadway side in the traveling direction. The surface of the louver is a white diffused surface that diffuses the light from the light source and converts it into soft light. Demonstrate the effect. Further, since the louvers are arranged so as to be at least in contact with each other when viewed from the front, the light source and the reflecting plate inside the housing are not directly visible from the front, and glare can be prevented without giving glare to the driver. .
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a roadside shoulder illumination device according to the present invention.
FIG. 2 is a plan view of the illumination device.
FIG. 3 is an enlarged side view in which a part of the illumination device is cut away.
FIG. 4 is a perspective view of a louver.
FIGS. 5A and 5B are diagrams showing road shoulder illumination. FIGS.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Road, 2 ... Separation zone, 3 ... Roadway, 4 ... Road shoulder, 5 ... Structure, 6 ... Storage groove, 7 ... Road shoulder illumination device, 11 ... Housing, 12 ... Front opening of housing, 13 ... Front frame, 14 ... light source, 15 ... louver, 16 ... reflector, 17 ... terminal block, 18 ... ballast, 30 ... illumination area.

Claims (2)

A roadside illumination device that is disposed on the side of a road and illuminates the roadside,
A light source disposed in the housing, a plurality of louvers arranged in parallel at a predetermined interval in the traveling direction of the vehicle at the front opening of the housing, and the light emitted from the light source is reflected forward and A reflector that guides the louver, and the louver is inclined in the traveling direction with respect to a vertical plane orthogonal to the traveling direction of the vehicle and arranged so that the front end edge is in front of the rear end edge in the traveling direction, A roadside shoulder illumination device, wherein the louver interval is set so as to be at least in contact with the front of the housing. The road shoulder lighting device according to claim 1,
A roadside illumination device characterized in that the surface of the louver is formed on a white diffusing surface, and the back surface is black matte.

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