JPH06287917A - Boundary mark pole for snow-buried road or the like - Google Patents

Abstract

PURPOSE:To reduce accident incidence by providing a colored reflection portion. in which fluorescent color is dispersed and transparent beads like glass beads are mixed in colored transparent synthetic resin layer, thereby improving visual perception at night, etc. CONSTITUTION:A colorless transparent synthetic resin layer 7 mixed with glass beads 6 is disposed on the surface of a highly reflective white-colored transparent synthetic resin layer 5, thereby providing a white-colored reflection portion. The portion is then attached on the outer surface of a rod 2 by use of a bond 8, covering the surface. Then, a colored transparent synthetic resin layer 11 dispersed with red fluorescent glass beads 10 is attached on the outer surface of the rod 2 by use of the bond 8, covering the surface. In the colored transparent synthetic resin layer 11, incident light is absorbed in the fluorescent color 9 and so converted in long wave length, so that in re-radiation, there occurs fluorescence. On the other hand, incident light in the transparent beads 6 is mostly reflected back toward the original light source in return reflection. Accordingly, the brightness is enhanced and the visual perception is improved due to combined effect of the fluorescent color 9 and the transparent beads 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pole for marking a boundary of a road buried in snow.

[0002]

2. Description of the Related Art In snowy countries, roads are often covered with snow in winter, and the boundaries of the roads are often unclear. When a vehicle or the like passes through such a road, an accident may occur in which the vehicle or the like comes off the road and gets stuck in a groove or the like. Therefore, in order to prevent such an accident, a means has been taken in which marking poles having a length such that the upper end portion thereof can protrude above the snow are erected at regular intervals along the boundary of the road. However, the conventional marking pole of this type has a poor visibility at night, and thus cannot completely prevent an accident.

[0003]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a "border mark pole for a road buried in snow or the like" which has good visibility even at night and can reduce the accident occurrence rate. To do.

[0004]

The "pole for boundary marking of roads buried in snow" of the present invention devised in order to achieve the above-mentioned object is a glass in a colored transparent synthetic resin layer in which a fluorescent dye is dispersed. It is characterized in that it is provided with a colored reflecting portion formed by mixing transparent beads such as beads.

[0005]

The light incident on the inside of the colored transparent synthetic resin layer is absorbed by the fluorescent dye, converted into light of a longer wavelength and re-emitted, and emits fluorescence at that time. Most of the light incident on the transparent beads such as glass beads is reflected in the direction of the original light source due to the retroreflectivity. The synergistic effect of the action of the fluorescent dye and the action of the transparent beads increases the brightness and improves the visibility. Some of the light that hits the transparent beads is transmitted or scattered by surface reflection, but the fluorescent dye absorbs not only direct light but also all incident light including scattered light and re-emits it as described above. Therefore, the transmitted or scattered light also acts on the fluorescent dye to generate fluorescence, and even light with a small amount of light emitted from the headlight of a car at night can be efficiently used without waste.

[0006]

Embodiments will be described below with reference to the drawings. First, FIG. 1 shows the overall shape. A concrete disk-shaped base 1 is provided at the lower end, and a pipe-shaped rod 2 is erected vertically in the center of the upper surface of the base 1. Thus, the red reflecting portions 3 and the white reflecting portions 4 are alternately provided downward from the upper end portion of the rod body 2. The rod 2 has a sufficient height that exceeds the amount of snow in the snow country.

Next, FIG. 2 shows a partial cross section of the rod 2. The white reflection part 4 is a highly transparent white synthetic resin base layer 5 on which a colorless transparent synthetic resin layer 7 mixed with glass beads 6 is provided. It is glued to cover. In addition, the red reflecting portion 3 is also formed on the surface of the base layer 5 by the red fluorescent dye 9
And a colored transparent synthetic resin layer 11 in which the fluorescent glass beads 10 are mixed are provided and are also bonded by an adhesive 8 so as to cover the outer peripheral surface of the rod 2.

In the above-mentioned red reflecting portion 3, the fluorescent dye 9
Polymethylmethacrylate was used as the transparent synthetic resin into which the fluorescent glass beads 10 are mixed, but in addition to this, polycarbonate, polystyrene or the like under specific constraint conditions such as silicone resin, acrylic resin, urethane A transparent resin such as a resin can be used.

As the fluorescent dye to be dispersed in the above transparent synthetic resin, a red special fluorescent dye (Fluorescence Red 300, Red 339) developed at BASF Coloring Materials Laboratory was used, but other fluorescent dyes and fluorescent pigments were used. It is also possible to use

Further, the fluorescent glass beads 10 are used as the transparent beads mixed in the above-mentioned transparent synthetic resin.
Ordinary glass beads that are not fluorescent may be used.
The fluorescent glass beads 10 are obtained by coating the entire surface of the glass beads with a transparent synthetic resin in which the above fluorescent dye is dispersed. Further, it is also possible to use glass beads whose surface is coated with a transparent synthetic resin in which a fluorescent dye is not dispersed. Further, as the transparent beads, titanium beads or the like can be used in addition to glass beads.

It is also possible to disperse a white fluorescent dye in the colorless transparent synthetic resin layer 7 in the white reflecting portion 4 described above.

Next, FIG. 3 shows another embodiment. Instead of providing the base 1 as in the above embodiment at the lower end of the rod body 2, a sharpened portion 12 is provided at the lower end of the rod body 2,
It is possible to pierce the ground. The white reflecting portion 4 and the red reflecting portion 3 are configured in the same manner as in the above embodiment.

In each of the embodiments described above, the white reflecting portion 4 and the red reflecting portion 3 are provided on the rod 2, but the selection and combination of colors may be arbitrary.

A comparison test of the visibility between the above-mentioned embodiment of the present invention and the conventional example was conducted. The results are shown in Table 1 below. In the first conventional example, glass beads are mixed into a transparent synthetic resin layer in which an ordinary dye is dispersed to form a colored reflecting portion. In the second conventional example, a fluorescent dye is dispersed in a transparent synthetic resin layer, but a glass is used. The beads do not mix, and the colored reflection portion is formed.

[0015]

[Table 1] However, ⊚ indicates that the visibility was very clear, and ∘ indicates that the visibility was relatively clear.

[0016]

The present invention is as described above, and is characterized in that a colored reflecting portion formed by mixing transparent beads such as glass beads in a colored transparent synthetic resin layer in which a fluorescent dye is dispersed is provided. The visibility at night or the like is significantly improved compared to the conventional example, so that the incidence rate of accidents where a vehicle or the like comes off the road can be reliably reduced.

[Brief description of drawings]

FIG. 1 is a perspective view.

FIG. 2 is a partially enlarged sectional view.

FIG. 3 is a perspective view.

[Explanation of symbols]

 1 Base 2 Bar 3 Red reflecting part 4 White reflecting part 5 Base layer 6 Glass beads 7 Colorless transparent synthetic resin layer 8 Adhesive layer 9 Fluorescent dye 10 Fluorescent glass beads 11 Colored transparent synthetic resin layer 12 Sharp parts

Claims (1)

[Claims] 1. A pole for marking a boundary of a road or the like buried in snow, comprising a colored reflecting portion formed by mixing transparent beads such as glass beads in a colored transparent synthetic resin layer in which a fluorescent dye is dispersed.