JPH0874217A - Self-luminescent type road tack - Google Patents

Abstract

PURPOSE: To devise a road tack not to be an obstacle for a vehicle and a pedestrian by way of lowering height of the road tack projected from a road surface and not to lower a visible effect from a point near to the road tack. CONSTITUTION: A light transmission body 2 with an inclined luminous face 23 formed on a side face 21 of it and with a plane of incidence 24 low on a back face of the luminous face 23 against the luminous face 23 is installed on an upper part of a tack main body 1. A luminous body 4 is installed toward the plane of incidence 24, and light of the luminous body 4 emitted by an electric power device 5 is injected into the light transmission body 2 from the plane of incidence 24. Injected central light L0 of the luminous body 4 is irradiated from the luminous face 23, another light L reflected inside of the light transmission body 2 is refracted by a light refracting body 3 provided on a lower face 25 of the light transmission body 2 and it is irradiated also from an upper face 22 of the light transmission body 2.

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 a center line of a road, the center of an intersection, and a pedestrian crossing, and causes a light source such as a light emitting diode to emit light by a power supply device to warn a vehicle driver or a pedestrian. It relates to self-luminous road tacks that prevent traffic accidents by guiding the eyes and guiding the eyes.

[0002]

2. Description of the Related Art Conventionally, as a self-luminous road tack that emits light from a light emitting diode 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 quadrangular truncated pyramid-shaped tack body that is projected from the road surface. At the same time, the light emitting diode is mounted in the light emitting window facing outward so that the light of the light emitting diode emitted by the power supply device is directly visible to the vehicle driver or the like.

[0003]

However, the self-luminous road tack 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 trapezoidal 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 due to the structure. Is the minimum required, usually 20-30m
It was projected from the road surface by about m, which was an obstacle for vehicles and pedestrians. In addition, the light from the light emitting diode is mounted outward so that it can be seen directly by the vehicle driver, and since the light emitting diode has strong directivity,
Although the visual effect from the front and the distance facing 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 or a place near the road tack is low, Therefore, the light of the light emitting diode becomes more difficult to see as the vehicle approaches the road tack from a distance.

Therefore, the present invention solves the above-mentioned problems, lowers the height projected from the road surface so as not to become an obstacle to vehicles and pedestrians, and from a place near a road tack. It is intended to provide a self-luminous road tack that does not reduce the visual recognition effect of.

[0005]

In order to achieve the above object, the present invention has the following constitution. That is, the self-luminous road tack according to the present invention has a tack main body and an inclined light emitting surface which is attached to an upper part of the tack main body and an inclined light emitting surface is formed on the side surface, and an incident surface is opposed to the light emitting surface below a rear surface of the light emitting surface. A light-transmitting member formed on the light-transmitting member, a light-refracting member provided on the lower surface of the light-transmitting member, a light-emitting member attached to the light-incident surface, and a power supply device for causing the light-emitting member to emit light. The emitted light of the illuminant enters the translucent body through the incident surface, the center light of the incident illuminant is emitted from the luminescent surface, and the other light reflected inside the translucent body is caused by the photorefractive body. It is characterized in that it is refracted and emitted from the upper surface of the light-transmitting body.

[0006]

According to the present invention, since the light of the light emitting body is emitted from the upper surface and the side light emitting surface of the light transmitting body, at least from the upper surface of the light transmitting body to the side light emitting surface is projected from the road surface. Well, the radiated light from the light emitting surface can be seen from a distance, and the radiated light from the upper surface of the translucent body can be seen from a place near the road tack.

[0007]

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 tack of the present invention, and FIG. 2 is a sectional view of the embodiment of FIG. 1, in which 1 is a tack body and 2 is a light-transmitting body. 3 is a photorefractive body,
Reference numeral 4 is a light emitter, and 5 is a power supply device.

Since the tack body 1 is directly attached to the road surface G,
It is usually made of a metal such as aluminum die cast, which is excellent in strength, corrosion resistance and moldability. The translucent body 2 is generally made of a hard transparent glass or a transparent synthetic resin such as polycarbonate having excellent impact resistance, scratch resistance, weather resistance, etc. so that it will not be damaged even when a vehicle etc. rides on it. And is attached to the upper portion of the tack body 1. In the present embodiment, the translucent body 2 has four side surfaces 21 facing each other, and the upper surface 22 has a smooth, substantially cross-shaped planar shape, and the upper edges of the four side surfaces 21 are each cut out in an inclined shape. A light emitting surface 23 is formed by the light emitting surface 23, and an incident surface 24 is formed below the rear surface of 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. The incident surface 24 is the light emitting surface 2
3, 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 portion of the other side surface 21 that opposes the one side surface 21 on which the light emitting surface 23 is formed is notched inward by the length for mounting the light emitting body 4, and the cutting is performed. The inward end portion that is cut off serves as the incident surface 24. It should be noted that, in the state of being attached to the road surface G, the upper surface 11 of the tack body 1 and the upper surface 22 of the translucent body 2 have substantially the same height so that no step is formed, and the light emitting surface 23 is naturally projected from the road surface G. However, if the incident surface 24 to which the light emitter 4 is attached is located below the road surface G,
The protruding height from is as low as possible.

In this embodiment, the tack body 1 and the light-transmitting body 2 are formed as separate bodies, and the tack body 1 protects the light-transmitting body 2 in strength, and the tack body 1 ensures the attachment to the road surface G. Although it is easy, the tack body 1 and the translucent body 2 may be integrally formed from the hard transparent glass or a transparent synthetic resin such as polycarbonate if possible in terms of strength.

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

As the light emitter 4, a light emitting diode having a strong directivity and a high brightness is generally used. Another reason why the light emitting diode is used is that the power supply voltage required for causing the light emitting diode to emit light is a low voltage of DC 30 V or less, and at such a low voltage there is little effect on the human body. This is because the power burying work can be done easily and without it. Therefore, due to the use of low voltage DC, the solar cell 51 is generally used as the power supply device 5 as in this embodiment. That is, in this embodiment, the solar cell 51 is housed in the storage portion 12 of the tack body 1 buried in the ground so as to face the lower surface 25 of the translucent body 2, and is incident from the upper surface 22 of the translucent body 2 during the daytime. A storage battery 52 for generating electric power by the sun's rays and storing the generated electric power of the solar cell 51, and a controller 53 for controlling the light emission of the light emitting body 4 are properly stored under the solar cell 51. Can also be used.

One or a plurality of the light-emitting bodies 4 are attached to the respective incident surfaces 24. When the light of the light-emitting body 4 emitted from the power supply device 5 enters the light-transmitting body 2 through the incident surface 24, the light-emitting surface 23 faces the incident surface 24. The central light L ₀ passing through the axis goes straight in the light transmitting body 2 and is emitted from the light emitting surface 23. When the light L other than the center light L ₀ and reflected inside the light transmitting body 2 reaches the light refracting body 3 while being repeatedly reflected inside the light transmitting body 2, the light L refracts. The light is refracted by the body 3 and emitted from the upper surface 22 of the transparent body 2.

The central light L ₀ emitted from the light emitting surface 23
In general, 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. By setting the elevation angle to 3 to 4 degrees, the emission angle of the central light L ₀ emitted from the emission surface 23 substantially matches the line-of-sight angle when seen by the vehicle driver at a distance of 50 m or more, and is effectively visually recognized. This is because

In the self-luminous road tack of the present embodiment, the light-emitting surface 23 is formed on the four side surfaces 21 of the translucent body 2 and the center light L ₀ is emitted in the cross direction, so that the cross-road road tack is formed. It is preferably installed at the center of the intersection, etc.
May be formed only on one side surface or two side surfaces so that the central light L ₀ is emitted only in one direction or two directions. The self-luminous road tack thus constructed is suitably installed along the center line of the road or a pedestrian crossing.

[0016]

As described above in detail, in the self-luminous road tack of the present invention, since the light of the light emitting body is emitted from the upper surface and the side light emitting surface of the light transmitting body, at least from the upper surface of the light transmitting body to the side surface. It is sufficient to project up to the light emitting surface from the road surface. Therefore, the portion protruding from the road surface becomes lower than in the conventional case, and it does not become an obstacle to vehicles and pedestrians.

Further, since the emitted light from the light emitting surface is seen from a distance, and the emitted light from the upper surface of the translucent body is seen from a place near the road tack, even if the approach is approached to the road tack from a distance. The emitted light from the upper surface of the light body is effectively visually recognized by the vehicle driver or the like.

[Brief description of drawings]

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tack body 2 Translucent body 21 Side surface 22 Upper surface 23 Light emitting surface 24 Incident surface 25 Lower surface 3 Photorefractive body 4 Light emitting body 5 Power supply device 51 Solar cell 52 Storage battery 53 Controller

Claims (1)

[Claims] 1. A stud main body, and a translucent body which is attached to an upper part of the stud main body and has an inclined light emitting surface formed on a side surface thereof, and an incident surface is formed below a rear surface of the light emitting surface so as to face the light emitting surface. And a light refracting body provided on the lower surface of the translucent body, a light emitting body mounted toward the incident surface, and a power supply device for causing the light emitting body to emit light, and the light of the light emitting body emitted by the power supply device. Is incident on the translucent body from the incident surface, the center light of the incident luminous body is radiated from the luminous surface, and other light reflected inside the translucent body is refracted by the photorefractive body and is on the upper surface of the translucent body. It is a self-luminous road tack that is also radiated from.