JP2002201617A - Road boundary display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a road boundary display device capable of ensuring high visibility even in bad weather such as snow, fog, and rain and preventing its installation place from being limited without affecting the surrounding environment adversely. SOLUTION: A boundary 2 on a road 1 is irradiated with laser beam B from above to display the boundary 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road boundary display device for displaying a boundary on a road by irradiating a light beam having high directivity onto a road surface.

[0002]

2. Description of the Related Art Conventionally, as a device for displaying a boundary on a road, for example, an arrow pointing upward from a boundary between a road and a sidewalk or a sideway (a step between a road and a sidewalk, a lane for a side road, a step between a road and a field, etc.) Some are called feathers. This arrow blade has a downward arrow shape, and is fixed to the tip of a pole erected on the road surface in this state. The driver is instructed by the driver to prevent accidents such as getting on the sidewalk of the car, colliding with the guardrail, and falling into the fields.

[0003]

In order to improve the visibility at night and in bad weather, a large number of light bulbs and LEDs are provided in front of the arrow and these are blinked so that the arrow is given to the driver. There are those that appeal the presence of wings and exert the same accident prevention effect at night and in bad weather as during the day. However, it has been pointed out that light from a light bulb or an LED has low directivity in nature, and is refracted or diffused by snow, fog, or rain, and the visibility thereof is significantly reduced. In addition, since it flashes overnight at night, there is a possibility that hindrance to sleep for residents along the road, adverse effects on crops due to light, ecology on birds and animals, and the like may occur. Further, in a conventional road boundary display device using a light bulb or an LED, there is a device that flashes the flash timing synchronously using a communication device represented by wireless communication or GPS. Since there is a possibility that radio waves or electromagnetic waves from nearby houses or the like may cause radio interference, they may not be able to be installed in necessary places. Therefore, an object of the present invention is to provide a road boundary display device that ensures high visibility even in bad weather such as snow, fog, and rain, and that does not adversely affect the surrounding environment and that is not limited in installation locations. Is to provide.

[0004]

The technical means adopted by the present invention to achieve the above object is a road boundary display device A for displaying a boundary 2 on a road 1, and a road boundary display device A for displaying the boundary 2 on the road 1. The display device is characterized in that the boundary 2 is displayed by irradiating a light beam having high directivity to the device 2 from above. (Claim 1)

[0005]

According to the present invention, the boundary 2 on the road 1 is displayed using light rays having high directivity. Can be secured. When the weather is fine, the road 1 is illuminated from above to illuminate the road 1 to display the boundary, and in bad weather such as snow, fog, and rain, the snow in the air being illuminated,
Since the boundary 2 is displayed by a part such as fog or rain shining in a band shape or a screen shape from the irradiation start point to the road 1, visibility can be improved in bad weather without flickering than in good weather without flashing. . In addition, the visibility is secured by illuminating the road surface without the need for blinking, so the installation place is not limited by using communication equipment as in the past, and it is securely installed in the required place can do. The beam having a high directivity is preferably a laser beam B, and the light amount of the laser beam B is
Since it is extremely small compared to a light bulb or an LED, even if it is illuminated overnight, it does not adversely affect the surrounding environment. (Claim 2) In addition to the laser beam, a light beam having a high directivity by condensing an LED can be used. In the following description, a light beam having a high directivity will be described as a laser beam B.

The road boundary 2 according to the present invention is a road 21
And the sidewalk 22, or the boundary between the road 21 and the side road, the boundary between the pedestrian crossing and the road 21, the stop line 23 and the opposite lane in the road 21, etc., meaning all the boundaries of the road 1 used by the cars or between the car and the pedestrian. I do. The road boundary display device A of the present invention is, for example, of a type provided so as to irradiate the laser beam irradiation device C downward on the arrowhead 3 (see FIG. 1).
In the following, a gate pole 6 installed across a road is provided so as to irradiate the laser beam irradiation device C downward (see FIG. 3; hereinafter, referred to as a gate type). These are used depending on the display location. For example, in order to display the boundary 2 between the roadway 21 and the sidewalk 22 or the roadway 21 and the side road, an arrow blade type is preferable. The arrow blade is positioned just above the boundary 2 and the laser beam B is irradiated directly below. . In this case, the irradiation width of the laser beam B is preferably the same as the lane width generally used. Also, the boundary 2 between the pedestrian crossing and the road 21 and the road 2
In order to display the stop line 23 in FIG. 1, a gate type is preferable. The laser beam irradiation device C is positioned between the pedestrian crossing 23 and the roadway 21 or directly above the stop line 23 so that the laser beam B is directly below. Irradiate. In this case, the irradiation width is preferably equal to the entire length of the pedestrian crossing and the entire length of the stop line 23.

[0007] The color of the laser beam B is desirably a color that calls attention to a driver or a pedestrian, and is preferably red, yellow, or blue used for a road signal. More preferably, the traffic light is red at a traffic light to indicate stop or yellow to indicate caution. This color is effective for making a driver or a pedestrian understand that attention is required. When red, yellow, and blue are used as the color of the laser beam B, the color of the laser beam B is changed in conjunction with the color of the signal when displaying the boundary between the pedestrian crossing and the road and the stop line on the road where there is a signal. It is also possible to make it. In other words, since the color of the laser beam B applied to the road 1 and the color of the signal are the same, even when the signal is difficult to see due to bad weather, the light of the road 1 and the light of the snow, fog, and rain in the air form a screen. Since the signal is displayed by the above, it is expected that traffic accidents at pedestrian crossings and intersections in bad weather can be reduced. The laser beam B is radiated and attenuated by using a reflecting mirror in order to prevent a driver or a pedestrian from seeing the direct light of the laser beam B. snow,
Irradiates fog and rain. The power of the laser beam B is preferably supplied by a solar cell rather than commercial power in order to improve the ease of product management and reduce the operating cost. Since the laser used in the present invention is used outdoors, it is desirable to use a natural air-cooled laser represented by a semiconductor laser. The laser used in the present invention has a safety class of 1 to 3A based on JIS C6802 (radiation safety standard for laser products).

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show an arrowhead type road boundary display device A. The road boundary display device A is the same as the one usually used in appearance, and the down arrow-shaped arrow feathers 3 whose front faces are alternately colored red and white are attached to the short-side tip of the inverted L-shaped pole 5. The arrowhead 3 is fixed to the road 2
In a state where it is located just above the boundary 2 between 1 and the sidewalk 22,
The rear end of the pole 4 on the long side is embedded and fixed in the ground.

A laser beam irradiator C for irradiating a laser beam B is fixed to the back surface of the arrowhead 3. The laser beam irradiating device C is provided inside the box C1 and the device main body C2.
And only the irradiation part C3 is exposed from the lower surface of the box C1.
Is irradiated downward. In this case, the irradiation width of the laser beam B is the same as the width of the lane used normally. Reference numeral 5 denotes a solar cell that supplies electric power to the laser beam irradiation device C. The solar cell 5 includes a solar panel 51 mounted on the upper surface of the box C1, and a storage battery 52 connected to the solar panel 51. It is connected to the apparatus main body C2 via a circuit 53.

The road boundary display device A as described above always emits the laser beam B toward the boundary 2 using the solar cell 5 as a power source to display the boundary 2 to a driver or a pedestrian. In the case of bad weather, the laser beam B irradiates snow, fog, and rain in the air, so that a portion irradiated from the irradiation portion C3 to the road 1 shines as a single band as shown in FIG. 2 is displayed.

FIG. 3 shows a gate type road boundary display device A.
Is shown. This type of road boundary display device A utilizes a portal pole 6 which is installed so as to cross a road and is provided with a sign on the upper side. At the intersection is displayed. The laser beam irradiation device C used for the portal type has the same structure as the arrow type shown above. In this case, by setting the irradiation width of the laser beam B to be equal to the length of the stop line 23, the laser beam B emitted toward the stop line 23 illuminates the stop line 23 and displays it to the driver. In the case of, when the laser beam B irradiates snow, fog, and rain in the air, a portion irradiated from the irradiation unit C3 to the roadway 21 illuminates substantially in a screen shape and the stop line 23 is displayed as illustrated. I do.

[0012]

As described above, the present invention displays a boundary on a road surface by using light rays having a high directivity. Therefore, unlike the conventional light bulbs and LEDs, light is not diffused and visibility is improved. In good weather, illuminate the road surface from above and illuminate the road surface to display the boundary.In bad weather such as snow, fog, rain, etc., in addition to the road surface light, the snow in the air being irradiated, Since a boundary such as fog or rain shines from the irradiation start point to the road surface in a band shape or a screen shape, the boundary is displayed, so that visibility can be improved in bad weather without flashing than in good weather. In addition, the visibility is secured by illuminating the road surface without the need for blinking, so the installation place is not limited by using communication equipment as in the past, and it is securely installed in the required place can do. Further, since the light amount of the laser beam is extremely small as compared with a light bulb or an LED, even if the light beam is illuminated all night, it does not adversely affect the surrounding environment. Therefore, it is possible to provide a road boundary display device that ensures high visibility even in bad weather such as snow, fog, and rain, and that does not adversely affect the surrounding environment and that is not limited in installation location. it can.

[Brief description of the drawings]

FIG. 1 is a front view of an arrowhead type road boundary display device.

FIG. 2 is a partially cutaway side view of an arrow-head type road boundary display device.

FIG. 3 is a front view of a gate type road boundary display device.

[Explanation of symbols]

 A: Road boundary display device B: Laser beam C: Laser beam irradiation device 1: Road 2: Boundary

Claims (2)

[Claims] 1. A road boundary display device for displaying a boundary on a road, wherein the boundary is displayed by irradiating a light beam having high directivity onto the boundary on the road from above. 2. The display device according to claim 1, wherein the light beam having a high directivity is a laser beam.