JP3634581B2 - Self-luminous road fence - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is installed on a road surface such as a road center line, the center of an intersection, a pedestrian crossing, etc., and a light source such as a light emitting diode is emitted by a power supply device to alert a vehicle driver or a pedestrian, This relates to a self-luminous roadway that aims to prevent accidents.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a self-luminous road fence that emits a light emitter such as a light emitting diode by a power supply device, a light emitting window is generally provided on the inclined side surface of a square pyramid-shaped fence main body protruding from the road surface, and the light emission. In some cases, a light emitting diode is attached to the outside in the window so that the light of the light emitting diode emitted by the power supply device can be directly seen by a vehicle driver or the like.
[0003]
[Problems to be solved by the invention]
However, the self-luminous roadway as described above has the following problems. That is, since the light emitting diode is attached to the inclined side surface of the quadrangular pyramid-shaped ridge body protruding from the road surface, the height of the ridge body protruding from the road surface is higher than the diameter of the light emitting diode due to the structure. However, it normally protrudes from the road surface by about 20 to 30 mm, which is an obstacle for vehicles and pedestrians.
[0004]
Therefore, a translucent body having a flat surface is attached to the upper part of the cocoon body, and a light emitting diode is disposed below the translucent body so that its optical axis is obliquely upward, and opposed to the luminous body. In some cases, an incident surface is formed on the translucent body, and light of the light emitting diode incident from the incident surface is emitted from the planar surface through the translucent body. In this self-light-emitting road fence, since the light-emitting diode is disposed below the light-transmitting body, it is not necessary to project a height that is larger than the diameter of the light-emitting diode as in the former, and projection from the road surface can be suppressed. .
[0005]
However, in this self-luminous roadway, in order to reduce the elevation angle of the light emitted from the translucent body so that it can be visually recognized by a distant vehicle driver, the inclination angle of the optical axis of the luminous body is decreased. Although it is necessary, since the total reflection occurs at the interface between the light transmitting body and air, that is, the surface of the light transmitting body when the tilt angle is equal to or smaller than a predetermined inclination angle, there is a limit to reducing the elevation angle of light.
[0006]
For example, in order to make the line-of-sight angle of the vehicle driver positioned at a height of 1.2 m above the ground and the elevation angle of the emitted light coincide with each other at a point 50 m away, the elevation angle should theoretically be about 1.37 degrees. . In order to set the elevation angle to about 1.37 degrees, when polycarbonate is used as the translucent material, its refractive index is 1.58, so it must be incident at an incident angle of 39 degrees. Since the critical angle with respect to air is 39.3 degrees, the incident angle is approximately near the critical angle. Therefore, there is a problem in making the elevation angle smaller than this, and since the light emitted from the light emitter spreads radially around the optical axis, some of the elevation angle is about 1.37 degrees. There is also a problem that the light becomes more than the critical angle and causes total reflection on the surface, and the amount of emitted light decreases and the visibility decreases.
[0007]
In order to suppress such total reflection and reduce the elevation angle of the emitted light, the planar surface of the light transmitting body is slightly protruded from the road surface and the protruding side surface is a light emitting surface inclined with respect to the optical axis of the light emitting body, There is also a self-luminous roadway that emits light from a light emitter from its light emitting surface. In this self-luminous roadway, since the light emitting surface is not flat but inclined, the incident angle is reduced by the inclination angle and total reflection can be prevented. However, since the surface of the translucent body is flat, it is easy for a vehicle or a pedestrian riding on the surface to slip, especially when a motorcycle rides on the surface in rainy weather, and there is a risk of slipping and falling. There is sex.
[0008]
Accordingly, the present invention solves the above-described problems, can suppress protrusion from the road surface, and emits light from the light emitter more efficiently than the translucent body to improve visibility and the elevation angle of the emitted light. It is intended to provide a self-luminous road fence that can be made small and that does not slip even when a vehicle or pedestrian rides on it.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is configured as follows.
That is, in the self-luminous road fence according to the present invention, a translucent body is attached to the upper part of the main body of the coffin embedded in the road surface, and the luminous bodies emitted by the power supply device are directed inward at the left and right lower portions of the translucent body, respectively. The light-transmitting body is attached to the upper part of the main body of the cocoon, and is substantially flush with the upper surface of the main body of the cocoon and is substantially flush with the road surface. Two inclined side surfaces that form one ridge by projecting one ridge with a substantially mountain-shaped cross section so as to cross the planar surface are respectively light emitting surfaces, and facing the light emitter below the back surface of the light emitting surface. The incident surface is formed respectively, and the light of the light emitter that has entered the light transmitting body from the incident surface is refracted downward from the light emitting surface and emitted to the outside. In addition, the self-luminous road fence according to the present invention is a road surface. A translucent body is attached to the upper part of the buried cocoon body, and light emitters emitted by the power supply device are attached to the left and right lower parts of the translucent body with the optical axis leveled inward, respectively. In the state where it is attached to the upper part of the main body of the main body, the upper surface of the main body of the main body is flush with the upper surface of the main body of the main body so as to be almost flush with the road surface so as to cross the flat surface. A light emitting body that is formed by projecting one ridge having a substantially mountain-shaped cross section to form a light emitting surface, and having a light emitting surface disposed below the light emitting surface and with the optical axis horizontally below the light emitting surface; An incident surface is formed opposite to the incident surface, and the incident surface is inclined with respect to the optical axis. Light emitted from the illuminant in a horizontal direction from the illuminant is refracted by the incident surface and light obliquely upward. And is refracted downward on the light emitting surface. It was made to be released to the outside Te is characterized in.
[0010]
According to the present invention, an inclined side surface in which a translucent body is attached to the upper portion of the main body, and a projecting ridge having a substantially mountain-shaped cross section is projected from a substantially central portion of the planar surface of the translucent body. Is used as a light emitting surface, and the light of the light emitting body disposed below the light transmitting body is refracted below the light emitting surface and emitted to the outside. Accordingly, since the light emitting surface is inclined, the incident angle is reduced by the inclination angle, and the light of the light emitting body can be efficiently emitted from the light emitting surface of the light transmitting body without being totally reflected, thereby improving visibility. The elevation angle of the emitted light can be reduced.
[0011]
Further, the light transmitting body is embedded so that the planar surface is substantially flush with the road surface, and only the protrusions as the light emitting surface protruding at the center of the surface protrude from the road surface. Further protrusion can be suppressed. Further, since the ridge protrudes from the central portion of the planar surface, the ridge has an anti-slip effect, and it is difficult to slip even if a vehicle or a pedestrian rides on the ridge.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be specifically described below with reference to the drawings.
1 is a plan view showing an embodiment of the present invention , FIG. 2 is a cross-sectional view of FIG. 1, and FIG. 3 is a cross-sectional view of a main part of FIG.
[0013]
In the drawings, 1 is a main body embedded in a road surface G, 2 is a translucent body attached to the upper part of the main body 1, and 3 is an arbitrary number of light emitters disposed below the translucent body 4. Is a power supply device for causing the light emitter 3 to emit light.
[0014]
Since the eaves body 1 is embedded in the road surface G, it is usually made of a metal such as an aluminum die cast having excellent strength, corrosion resistance and formability. The translucent body 2 is a hard transparent material excellent in impact resistance, scratch resistance, weather resistance, etc. so that it does not break even if a vehicle or the like rides on the translucent body 2 and the light of the light emitting body 3 is transmitted. It is generally produced from a synthetic resin having translucency such as glass, polycarbonate, and acrylic resin.
[0015]
As the luminous body 3, a light emitting diode, a halogen lamp, a metal halide lamp, a cathode tube, electroluminescence, a xenon lamp, or the like is appropriately used. In general, a light emitting diode having strong directivity and high luminance is preferably used. Another reason why light-emitting diodes are used is that the power supply voltage required to cause the light-emitting diodes to emit light is a low voltage of 30 volts DC or less. This is because the power source burying work is easy and possible without the need. Therefore, in this embodiment, a light emitting diode is used as the light emitter 3, and a solar cell 41 is used as the power supply device 4 because of the use of DC low voltage. That is, in this embodiment, the solar cell 41 is housed in the center of the lower surface of the translucent body 2 in the main body 1 embedded in the ground, and the solar cell 41 is powered by the daytime solar rays incident from the translucent body 2. Is generated. A power storage device 42 that stores the generated power of the solar cell 41 and a controller 43 that controls the light emission of the light emitter 3 are appropriately stored below the solar cell 41, and the power is supplied directly from the solar cell 41 or from the power storage device 42. In addition to being supplied, the light-emitting body 3 is lit or blinked only day or night or at night by being appropriately controlled by the controller 43. Of course, a commercial power supply can be used.
[0016]
The relationship between the light emitter 3 and the translucent body 2 will be further described. The light emitter 3 is disposed on the left and right lower portions of the translucent body 2 with the optical axis 31 being horizontal and facing inward. The translucent body 2 is attached to the upper portion of the ridge body 1 so as to cross the planar surface 21 at a substantially central portion of the planar surface 21 embedded so as to be substantially flush with the road surface G. A protrusion 22 having a substantially mountain-shaped cross section is protruded. The two inclined side surfaces forming the protrusions 22 are respectively light emitting surfaces 23, and the light incident surfaces 24 are respectively formed below the light emitting surfaces 23 so as to face the light emitters 3.
[0017]
The incident surface 24 is inclined with respect to the optical axis 31 of the light emitter 3, and the light L of the light emitter 3 radiated in the horizontal direction is refracted by the incident surface 24 that is an interface with air and slanted. The light L is directed upward into the light transmitting body 2 from the incident surface 24 and is emitted to the outside from the light emitting surface 23 facing the light. When emitted to the outside, the light L of the light emitter 3 is refracted downward at the light emitting surface 23 which is an interface with air, and is emitted with a small elevation angle α. The refraction angle of the light L at the incident surface 24 and the light emitting surface 23 is determined by the refractive index of the material forming the light transmitting body 2, but the inclination angle of the incident surface 24 with respect to the optical axis 31 of the light emitting body 3 is It is necessary to set the light L to be refracted upward by the incident surface 24 and reach the light emitting surface 23, and the inclination angle of the light emitting surface 23 is emitted from the light emitting surface 23 at a predetermined elevation angle α. It is appropriately set according to the inclination angle of the light L when it reaches the light emitting surface 23.
[0018]
Although the elevation angle α of the light L emitted from the light emitting surface 23 is not particularly limited, it can be effectively visually recognized substantially in line with the line-of-sight angle when viewed from a vehicle driver 50 m or more away. It is preferable to make it as small as possible, approximately 1 to 5 degrees.
[0019]
In the above embodiment, the two inclined side surfaces forming the protrusions 22 are respectively the light emitting surfaces 23, and the light emitters 3 are respectively disposed on the incident surfaces 24 provided below the back surfaces of the respective light emitting surfaces 23. Thus, the light L of the light emitter 3 is emitted in two directions, but only one of the inclined side surfaces forming the ridge 22 becomes the light emitting surface 23, and the light L is emitted only in one direction. It may be made to be done.
[0020]
Further, the light emitter 3 may be disposed with its optical axis 31 obliquely upward, or may be disposed directly above, and the arrangement direction is not particularly limited. In addition, the angle of the incident surface 24 with respect to the optical axis 31 of the light emitter 3 is obtained by inclining the incident surface 24 with respect to the optical axis 31 of the light emitter 3 or making it perpendicular to the optical axis 31 of the light emitter 3. Is appropriately set so that the light L of the light emitting body 3 incident on the light transmitting body 2 reaches the light emitting surface 23.
[0021]
Further, in this embodiment, the heel body 1 and the translucent body 2 are formed as separate bodies, and the translucent body 2 is protected with strength by the heel body 1 and can be reliably and easily attached to the road surface G by the heel body 1. However, if possible in terms of strength, the bag main body 1 and the translucent body 2 may be integrally formed of the hard transparent glass, transparent synthetic resin such as polycarbonate or acrylic resin, or the like.
[0022]
【The invention's effect】
According to the present invention, since the light emitting surface is inclined, the incident angle is reduced by the inclination angle, and the light of the light emitting body is efficiently emitted from the light emitting surface of the light transmitting body without being totally reflected. The elevation angle of the emitted light can be reduced while improving the property.
[0023]
Further, the light transmitting body is embedded so that the planar surface is substantially flush with the road surface, and only the protrusions as the light emitting surface protruding at the center of the surface protrude from the road surface. Further protrusion can be suppressed. Further, since the ridge protrudes from the central portion of the planar surface, the ridge has an anti-slip effect, and it is difficult to slip even if a vehicle or a pedestrian rides on the ridge.
[Brief description of the drawings]
FIG. 1 is a plan view showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view of FIG.
FIG. 3 is a cross-sectional view of a main part of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 鋲 body 2 Translucent body 21 Surface 22 Projection 23 Light emitting surface 24 Incident surface 3 Light emitting body 31 Optical axis 4 Power supply device 41 Solar cell 42 Power storage device 43 Controller G Road surface L Light emitting body light α Elevation angle

Claims (2)

A translucent body is attached to the upper part of the main body embedded in the road surface, and the light emitters emitted by the power supply device are respectively attached to the left and right lower parts of the translucent body inwardly. In the state where it is attached to the top surface of the main body of the kite, it is substantially flush with the upper surface of the main body and substantially in the center of the planar surface embedded so as to be substantially flush with the road surface. Two slanted side surfaces that form one ridge projecting from the shape of the ridge are each a light emitting surface , and an incident surface is formed facing the light emitter below the back surface of the light emitting surface. A self-luminous roadway characterized in that light of a light-emitting body incident on a light-transmitting body is refracted below the light-emitting surface and emitted to the outside. A translucent body is attached to the upper part of the main body embedded in the road surface, and light emitters emitted by the power supply device are attached to the left and right lower portions of the translucent body with the optical axis leveled inward, respectively. Is installed in the upper part of the main body of the kite and crosses the planar surface at a substantially central portion of the planar surface embedded so as to be flush with the upper surface of the kite body and almost flush with the road surface. As shown in the figure, the light emitting surface is formed by projecting one ridge having a substantially mountain-shaped cross section and forming two inclined side surfaces forming the ridge as a light emitting surface , and with the optical axis horizontally below the back surface of the light emitting surface. An incident surface is formed facing the body, and the incident surface is inclined with respect to the optical axis. Light emitted from the illuminant in the horizontal direction from the illuminant is refracted by the incident surface and obliquely upward. The light is incident on the translucent body and bent downward on the light emitting surface. It has been spontaneous light road stud, characterized in that it is adapted to be discharged to the outside.

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