JP3256092B2 - Light-emitting road tack - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is installed on the ground surface such as the center line of a road, the center of an intersection, or a pedestrian crossing, and emits a light emitting body 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. At the same time, a light-emitting diode is mounted in the light-emitting window so as to face outward, 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 truncated quadrangular pyramid-shaped stud body protruding from the road surface, the height of the stud body protruding from the road surface is higher than the diameter of the light emitting diode due to the structure. Is the minimum required, usually 20-30m
It protrudes from the road surface by about m, which is an obstacle for vehicles and pedestrians. In addition, since the light of the light emitting diode is installed outward so that the light of the light emitting diode is directly visible to a vehicle driver and the like, and since the light emitting diode has a strong directivity,
Although the visibility effect from the front and far away from the light emitting direction and the light emitting angle of the light emitting diode is excellent, the visual effect from a place deviating from the light emitting direction and the light emitting angle of the light emitting diode and a place close to the road tack is low, Therefore, as the vehicle approaches the road stud from a distance, the light of the light emitting diode becomes difficult to see.

Accordingly, the present invention solves the above-mentioned problems, and reduces the height of the projection from the road surface so as not to be an obstacle to vehicles and pedestrians. It is intended to provide a self-luminous road stud which does not reduce the visual recognition effect of the vehicle.

[0005]

In order to achieve the above object, the present invention has the following arrangement. That is, the self-luminous road tack according to the present invention has a tack main body, an inclined light emitting surface formed on the side surface attached to the upper portion of the tack main body, and an incident surface facing the light emitting surface below the rear surface of the light emitting surface. A light-transmitting member formed on the light-transmitting member, a light refractor provided on the lower surface of the light-transmitting member, a light-emitting member attached to the incident surface, and a power supply device for causing the light-emitting member to emit light. The emitted light of the illuminant enters the light transmitting body from the incident surface, and the central light of the illuminated light is radiated from the light emitting surface, and the other light reflected inside the light transmitting body is reflected by the light refractor. It is characterized by being refracted and radiated also from the upper surface of the light transmitting body.

[0006]

According to the present invention, the light of the luminous body is radiated from the upper surface and the side luminous surface of the light transmitting body. Also, the radiated light from the light emitting surface is visually recognized from a distance, and the radiated light from the upper surface of the light transmitting body is visually recognized from a place near the road stud.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a plan view showing an embodiment of a self-luminous road stud according to the present invention, and FIG. 2 is a cross-sectional view of the embodiment of FIG. 3 is a light refractor,
Reference numeral 4 denotes a light emitter, and reference numeral 5 denotes a power supply device.

Since the main body 1 of the tack is directly attached to the road surface G,
It is usually made of metal such as aluminum die cast which has excellent strength, corrosion resistance and moldability. The light transmitting body 2 is generally made of hard transparent glass having excellent impact resistance, abrasion resistance, weather resistance, etc., or a transparent synthetic resin such as polycarbonate so as not to be damaged even when a vehicle or the like rides thereon. And is attached to the upper part of the stud body 1. In this embodiment, the light-transmitting member 2 has four opposing side surfaces 21, the upper surface 22 has a smooth, substantially cross-shaped planar shape, and the upper edges of the four side surfaces 21 are respectively cut off in an inclined manner. A light emitting surface 23 is formed, and a light incident surface 24 is formed below the light emitting surface 23 so as to face each light emitting surface 23.
The inclination angle of the light emitting surface 23 is generally set to about 45 degrees with respect to the upper surface 22. Also, the incident surface 24 is the light emitting surface 2
3 may be close to each other, but the distance between the incident surface 24 and the light emitting surface 23 should be as large as possible so that light other than the central light L _{0 of the} light emitting body 4 is reflected in the light transmitting body 2 as much as possible. Is preferred. Therefore, in the present embodiment, the lower edge of the other side surface 21 opposite to the one side surface 21 on which the light emitting surface 23 is formed is cut inward by the length for mounting the light emitting body 4, The missing inner end forms an incident surface 24. In the state of being attached to the road surface G, the upper surface 11 of the tack main body 1 and the upper surface 22 of the translucent member 2 have substantially the same height so that a step does not occur. However, the light incident surface 24 to which the light-emitting body 4 is attached is located below the road surface G so that the road surface G
The height of the projection is as low as possible.

In this embodiment, the stud body 1 and the light-transmitting member 2 are formed separately, and the light-transmitting member 2 is strongly protected by the stud member 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 above-mentioned hard transparent glass or a transparent synthetic resin such as polycarbonate.

The light refractor 3 is provided on the lower surface 25 of the translucent member 2 and refracts incident light in the front direction.
In this embodiment, the light refracting body 3 uses a light refracting material such as a transmissive lens film, but the lower surface 25 of the light transmitting body 2 is made uneven by embossing or a small transparent glass sphere is embedded. The refractor 3 may be formed integrally. The light refractor 3 may be provided on the entire lower surface 25 of the translucent member 2, but is provided only on the end of the lower surface 25 in this embodiment. The reason is that the lower surface 25 of the light transmitting body 2 will be described later.
Since the solar cells 51 are housed opposite to each other in the center, if the light refractor 3 is provided on the entire lower surface 25 of the translucent member 2,
This is because sunlight rays incident from the upper surface 22 of the light transmitting body 2 are refracted by the light refractor 3 and do not efficiently enter the solar cell 51. The lower surface 25 of the light transmitting member 2 means any downward surface except for the upper surface 22 and the side surface 21 of the light transmitting member 2. Further, in this embodiment, the light refracting body 3 is provided in a slightly inclined shape so that the refracted light spreads slightly above the light transmitting body 2 outward.

As the luminous body 4, a light emitting diode having high directivity and high luminance is generally 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, and 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, a solar cell 51 is generally used as the power supply device 5 as in this embodiment because of the use of a low DC voltage. That is, in the present embodiment, the solar cell 51 is housed in the storage portion 12 of the tack main body 1 buried in the ground so as to face the lower surface 25 of the light transmitting body 2, and is incident during the daytime from the upper surface 22 of the light transmitting body 2. A storage battery 52 for generating power by the solar rays and storing the generated power of the solar cell 51, a controller 53 for controlling the light emission of the luminous body 4, and the like are provided below the solar cell 51 as needed. Can also be used.

One or a plurality of the luminous bodies 4 are attached to each of the light incident surfaces 24. Then, when the light of the luminous body 4 emitted by the power supply device 5 enters the light transmitting body 2 from the incident surface 24, the light emitting surface 23 faces the incident surface 24, so that The center light L ₀ passing through the axis passes straight through the light transmitting body 2 and is emitted from the light emitting surface 23. Other light L other than the central light L ₀ , which is reflected inside the light transmitting body 2, is repeatedly refracted inside the light transmitting body 2 and reaches the light refracting body 3 when the light L is refracted. The light is refracted by the body 3 and radiated from the upper surface 22 of the transparent body 2.

The center light L ₀ radiated from the light emitting surface 23
Usually, the mounting angle of the light emitter 4 is set so that the light is emitted at an elevation angle of 3 to 4 degrees. With 3-4 ° elevation, light emission angle of the center light L ₀ emitted from the light emitting surface 23 is substantially coincident with the line of sight angle as viewed from the vehicle operator or more away 50m, effectively viewing That's because.

The self-luminous road stud according to the present embodiment, the light emitting surface 23 is formed on the four side surfaces 21 of the transparent body 2, since the center light L ₀ in a cross direction is adapted to be emitted, the crossroads It is preferably installed at the center of the intersection, etc.
For example, it may be an aspect or central optical L ₀ only only formed in one direction or two directions 2 side is emitted. The self-luminous road tack thus made is suitably installed along the center line of a road, a crosswalk, or the like.

[0016]

As described above in detail, in the self-luminous road stud of the present invention, since the light of the luminous body is radiated from the upper surface and the side luminous surface of the translucent body, at least from the upper surface of the translucent body to the side surface. The light emitting surface may be projected from the road surface. Therefore, the portion protruding from the road surface is lower than in the past, and there is no obstacle to vehicles and pedestrians.

Further, the radiated light from the light emitting surface is visually recognized from a distance, and the radiated light from the upper surface of the translucent member is visually recognized from a place near the road stud. Radiated light from the upper surface of the light body is effectively visually recognized by a vehicle driver or the like.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a self-luminous road tack of the present invention.

FIG. 2 is a sectional view of the embodiment of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 tack main body 2 translucent body 21 side surface 22 top surface 23 light emitting surface 24 incident surface 25 lower surface 3 light refractor 4 light emitter 5 power supply device 51 solar cell 52 storage battery 53 controller

Claims (1)

(57) [Claims] 1. A stud body, and a translucent body attached to an upper portion of the stud body, having an inclined light emitting surface formed on a side surface, and an incident surface formed below the light emitting surface opposite to the light emitting surface. And a light refractor provided on the lower surface of the light transmitting body, a light emitting body attached to the incident surface, and a power supply device for causing the light emitting body to emit light. Is incident on the light-transmitting body from the incident surface, and the central light of the incident light-emitting body is emitted from the light-emitting surface, and the other light reflected inside the light-transmitting body is refracted by the light refractor and the upper surface of the light-transmitting body Self-luminous road studs that are also radiated from.