JPH10266145A - Selfluminous type road rivet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a selfluminous type road rivet which can be prevented from protruding from the road surface and efficiently allows the light of a luminous body to fall into a translucent body, improving visibility. SOLUTION: An illuminant 3 is disposed under a translucent body 2 in such a manner that the optical axis 32 of a luminous surface 31 of the body 3 is oriented obliquely upward and in the body 2, a nearly concave incidence surface 22 is formed in opposition to the luminous surface 31 of the illuminant 3. Rays of light L radially emitted from the body 3 are passed through the body 2 so as to be oriented obliquely upward by the concave-shaped surface 22 so that the rays are delivered from the surface of the body 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is installed on a road surface such as a center line of a road, the center of an intersection, a pedestrian crossing, etc., and emits a light emitting element such as a light emitting diode by a power supply device to warn a vehicle driver or a pedestrian. The present invention relates to a self-luminous road stud that performs gaze guidance and the like to prevent traffic accidents.

[0002]

2. Description of the Related Art Conventionally, as a self-luminous road stud which emits a light-emitting body such as a light-emitting diode by a power supply device, a light-emitting window is generally formed on an inclined side surface of a truncated square pyramid-shaped stud body protruding from a road surface. In some cases, a light emitting diode is attached to the outside of the light emitting window so that the light of the light emitting diode emitted by the power supply device is directly visible to a vehicle driver or the like.

[0003]

However, the self-luminous road stud as described above has the following problems. That is, since the light emitting diode is attached to the inclined side surface of the frustum of a square truncated pyramid-shaped stud body protruding from the road surface, the height of the stud body protruding from the road surface is equal to or larger than the diameter of the light emitting diode. Is the minimum required, usually 20-30m
It protrudes about m from the road surface, which is an obstacle for vehicles and pedestrians.

Therefore, a light transmitting body is attached to the upper part of the tack body, and a light emitting diode is arranged below the light transmitting body so that its optical axis is directed obliquely upward, and a flat incident surface perpendicular to the optical axis is formed. In some light-emitting devices, light from a light-emitting diode is made incident on the light incident surface, passes through the light-transmitting material, and is emitted from the surface of the light-emitting diode. In this self-luminous road tack, the light emitting diode is arranged below the light transmitting body, so that it is not necessary to protrude a height greater than the diameter of the light emitting diode as in the former, and it is possible to suppress the protrusion from the road surface. .

However, in this self-luminous road stud, the light incident surface is formed in a plane perpendicular to the optical axis of the light emitter, so that the light emitted from the light emitter near the optical axis enters the light transmitting body from the incident surface. Although the light is incident, the light of the luminous body is emitted radially around the optical axis, and the light emitted from a place away from the optical axis is obliquely incident on the incident surface. There is a problem that the light is reflected by the incident surface and cannot be efficiently incident, and therefore the amount of light is insufficient and satisfactory visibility cannot be obtained.

Accordingly, the present invention solves the above-mentioned problems, suppresses the protrusion from the road surface, and allows the light of the luminous body to efficiently enter the light-transmitting body to improve the visibility. It is intended to provide a self-luminous road tack.

[0007]

In order to achieve the above object, the present invention has the following arrangement. That is, in the self-luminous road tack according to the present invention, the light of the luminous body emitted by the power supply device is emitted from the surface of the light transmitting body attached to the upper part of the tack body buried on the road surface. A self-luminous road stud, wherein the luminous body is disposed below the light-transmitting body with the optical axis of the light-emitting surface facing obliquely upward, and the light-transmitting body has a substantially concave curved surface facing the light-emitting surface of the light-emitting body. An incident surface is formed, and light of the luminous body, which is obliquely upwardly incident on the light transmitting body from the incident surface, is emitted from the surface of the light transmitting body.

According to the present invention, the luminous body is arranged below the translucent body, and the light of the luminous body is made to enter the translucent body from the incident surface and to be emitted from the surface. Further protrusion can be suppressed. Also, since the light-entering surface formed on the light-transmitting body has a substantially concave shape facing the light-emitting surface of the light-emitting body, even if the light of the light-emitting body is emitted radially, the light-entering surface has a concave shape. Reflection is suppressed. Accordingly, since the light of the light emitting body can be efficiently made incident from the incident surface, a large amount of light can be emitted from the surface of the light transmitting body, so that the visibility is improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to the drawings. 1 is a plan view showing one embodiment of the present invention, FIG. 2 is a cross-sectional view of FIG. 1, FIG. 3 is a cross-sectional view of a main part of FIG. 1, and FIG. 4 is a main view showing another embodiment of the present invention. It is sectional drawing of a part.

In the drawings, reference numeral 1 denotes a tack body embedded in a road surface G, 2 denotes a translucent member mounted on an upper portion of the tack body 1,
Reference numeral 3 denotes a light-emitting body disposed below the light-transmitting body 2 with the optical axis 32 of the light-emitting surface 31 obliquely upward, and reference numeral 4 denotes a power supply device for causing the light-emitting body 3 to emit light.

Since the rivet body 1 is buried in the road surface G, it is usually made of metal such as aluminum die-casting having excellent strength, corrosion resistance and moldability. The transparent body 2 is a hard transparent material having excellent impact resistance, abrasion resistance, weather resistance, etc., so that it is not damaged even when a vehicle or the like rides thereon, and the light of the luminous body 3 is transmitted. It is generally made of light-transmitting synthetic resin such as glass, polycarbonate, acrylic resin, or the like. The surface 21 has a flat smooth surface, and is attached to the top of the tack main body 1. Surface 21
Is mounted so as to be substantially flush with the road surface G.

As the luminous body 3, a light emitting diode, a halogen lamp, a metal halide lamp, a cathode tube, electroluminescence, or the like is used as appropriate. In general, a light emitting diode having strong directivity and high luminance is preferably used. Another reason that 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. Such a low voltage has little effect on the human body. This is because the power source burying work is easy and possible without the need. Therefore, the solar cell 41 is generally used as the power supply device 4 as in the present embodiment because of the use of low DC 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 tack main body 1 buried underground, and the solar cell 41 is irradiated by daytime sunlight rays from the surface 21 of the translucent body 2. 41 is generating electric power. Below the solar cell 41, a power storage device 42 for storing the generated power of the solar cell 41, a controller 43 for controlling the light emission of the luminous body 3 and the like are appropriately housed, and the power is supplied directly from the solar cell 41 or from the power storage device 42. The light-emitting body 3 is supplied and controlled by the controller 43 so that the light-emitting body 3 is turned on or off. Of course, a commercial power supply can be used.

The relationship between the light emitting body 3 and the light transmitting body 2 will be further described. The light emitting body 3 is disposed below the light transmitting body 2 with the optical axis 32 of the light emitting surface 31 obliquely upward. In this configuration, the flat planar surface 21 and the extension of the optical axis 32 of the light emitting body 3 are arranged so as to obliquely intersect. On one translucent body 2, a substantially concave curved incident surface 22 is formed facing the light emitting surface 31 of the light emitting body 3, and the light of the light emitting body 3 emitted radially around the optical axis 32 is formed. L is the incident surface 22
The light is incident on the light transmitting body 2.

The concave curved incident surface 22 may be a concave spherical surface surrounding the light emitting surface 31 of the light emitting body 3 or a concave columnar surface. If the curvature of the light-emitting surface 31 does not match the curvature of the light-emitting surface 31, the light may be slightly reflected on the incident surface 22, so that the curvature of the incident surface 22 and the curvature of the light-emitting surface 31 are matched, that is, a concave curved surface is formed. It is preferable that the incident surface 22 has a shape along the light emitting surface 31 of the light emitting body 3. In this way, almost all the light L of the luminous body 3 emitted radially from the light emitting surface 31 around the optical axis 32 is orthogonal to the incident surface 22.
The reflection on the incident surface 22 is suppressed, and the light L of the light emitting body 3 can be efficiently made to enter the light transmitting body 2.

In this manner, the light L of the luminous body 3 radiating obliquely upward from the incident surface 22 into the translucent body 2
Travels obliquely upward in the light-transmitting member 2 as it is, is refracted by the surface 21 of the light-transmitting member 2, and is emitted from the surface 21 of the light-transmitting member 2.

The light L of the light-emitting body 3 emitted from the surface 21 of the light-transmitting body 2 has an inclination angle β of the optical axis 32 of the light-emitting body 3,
The central light L ₀ emitted from the optical axis 32 determined by the refractive index of the light transmitting body 2 is emitted radially around the elevation angle α of the central light L _0, but the central light L ₀ emitted from the optical axis 32 is most easily visually recognized. Also, usually, if the light is emitted with the elevation angle α of 3 to 5 degrees, the angle of sight almost coincides with the line of sight of a vehicle driver 50 m or more away, so that the light can be visually recognized effectively. Preferably, the inclination angle β of the optical axis 32 is determined so that the elevation angle α of the center light L ₀ is 3 to 5 degrees.
There is no particular limitation.

The self-luminous road stud according to the present embodiment is usually installed at the center of an intersection of a crossroad, etc., so that the light emitters 3 are emitted in the respective cross directions so that the light of the emitters 3 is emitted in the cross direction. In addition to the arrangement, the light incident surface 22 is formed on the light transmitting body 2 so as to face each of the light emitting bodies 3. However, when the light emitting body 3 is installed along a center line, a pedestrian crossing, etc. The luminous body 3 may be arranged so that only the light of the luminous body 3 is emitted. In addition, the number of the light emitters 3 arranged to face each of the light incident surfaces 22 of the light transmitting body 2 may be one, or a plurality of light emitters 3 may be arranged side by side along the light incident surface 22.

In this embodiment, the stud body 1 and the light-transmitting body 2 are formed separately, and the light-transmitting body 2 is strongly protected by the stud body 1, and the attachment to the road surface G is ensured by the stud body 1. Although it is easy, if the strength is possible, the tack main body 1 and the light transmitting body 2 may be integrally formed of the hard transparent glass or a transparent synthetic resin such as polycarbonate or acrylic resin.

Further, in this embodiment, the protrusion of the surface is suppressed so that the vehicle and the pedestrian do not become an obstacle,
The surface 21 is flat and is buried substantially flush with the road surface G, but may protrude from the road surface G to such an extent that it does not hinder vehicles and pedestrians. The surface 21 may be formed in a shape other than a plane such as a convex spherical surface.
Also as shown in FIG. 4, to form the inclined surface 23 on the surface of the transparent body 2, by emitting refracts the center light L ₀ in particular from the inclined surface 23 downwardly, is emitted at a predetermined elevation angle α You may do so.

[0020]

As described above in detail, in the self-luminous road tack of the present invention, since the luminous body is disposed below the translucent body, it can be prevented from protruding from the road surface and can be used for vehicles and pedestrians. It does not become an obstacle. In addition, since the light-entering surface formed on the light-transmitting member has a substantially concave surface facing the light-emitting surface of the light-emitting member, even if the light of the light-emitting member is emitted radially, the incident surface is formed by the concave surface. Is suppressed, and the light of the luminous body can be efficiently incident from the incident surface,
Since much light can be emitted from the surface of the translucent body, visibility is improved.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a sectional view of FIG.

FIG. 3 is a sectional view of a main part of FIG. 1;

FIG. 4 is a sectional view of a main part showing another embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 tack main body 2 translucent body 21 surface 22 incident surface 23 inclined surface 3 light-emitting body 31 light-emitting surface 32 optical axis 4 power supply device 41 solar cell 42 power storage device 43 controller

Claims (3)

[Claims] 1. A self-luminous road stud adapted to emit light of a light emitter emitted by a power supply device from a surface of a light transmissive member mounted on an upper part of a stud body embedded in a road surface. The light-emitting body is disposed below the light-transmitting body with the optical axis of the light-emitting surface facing obliquely upward, and the light-transmitting body has a substantially concave curved incident surface facing the light-emitting surface of the light-emitting body. A self-luminous road stud characterized in that light of a luminous body, which is obliquely upwardly incident on a light-transmitting body from an incident surface, is emitted from a surface of the light-transmitting body. 2. The self-luminous road stud according to claim 1, wherein the concave curved incident surface is formed along the light emitting surface of the light emitting body. 3. The self-luminous road according to claim 1, wherein the surface of the light transmitting body from which the light of the light emitting body is emitted has a planar shape and is buried substantially flush with the road surface. Tack.