JPH0544865Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is applicable to vehicle number display boards (hereinafter referred to as number display boards) for automobiles, motorcycles, motorized bicycles, etc., and road sign display boards (hereinafter referred to as number display boards) such as guide signs and regulatory signs. The invention relates to reflective sign boards used as road signs (hereinafter referred to as road signs).

Conventional technology Conventionally, for example, number plates for cars, etc. were made by stamping aluminum plates or steel plates to create floating letters.
After being coated with resin, the tops of the floating letters are colored (hereinafter referred to as a painted number sign board).
On the other hand, reflective number display boards (hereinafter referred to as reflective number display boards) are used on some motorcycles and motorized bicycles, but these reflective number display boards are made of aluminum plates, steel plates, polyvinyl chloride steel plates, etc. A relatively flexible encapsulated lens-type reflective material is attached, mechanically raised letters are formed, and the flat parts at the tops of the letters are colored. These reflective number sign boards are currently being implemented in many countries and are greatly contributing to the prevention of traffic accidents and crime. In addition to the above, an internally illuminated number sign board called an andon type or character light type, in which only the characters are illuminated by a light bulb inside the sign device, is used as a number sign board.

Problems that the invention aims to solve: Vehicle number plates indicate the type, size, jurisdiction, purpose, etc. of the vehicle, but for traffic safety reasons, front-reflective plates are being adopted around the world. ing. In other words, the purpose is to improve nighttime visibility of stopped vehicles on expressways and road shoulders. Currently, in Japan, reflective number display plates are in practical use on motorized bicycles and other vehicles under the jurisdiction of local governments, in addition to cars and motorcycles.

Conventionally used painted number sign boards have light bulbs installed at the top or on both sides, which are turned on at night. However, in many visibility tests, it has been pointed out that painted number sign boards are less visible at night than reflective number sign boards.

On the other hand, reflective number sign boards have good visibility at night. However, its production requires many steps such as pasting retroreflective material on aluminum plates or PVC steel plates, embossing, printing, and drying.
A particular problem in this case is cracks in the character parts during embossing. In other words, compared to the alpha alphabet characters used in other countries, the kanji characters used in Japan,
Hiragana characters are prone to cracks due to the complexity of the characters and the depth of the embossing. Furthermore, as a characteristic of retroreflective materials, depending on the type of synthetic resin, cracking during embossing is promoted if the working environment is cold in winter. Furthermore, when printing is applied to the tops of letters after embossing and heating, which is called baking, is performed in a furnace, various problems occur, such as air bubbles being generated between the adhesive and the substrate.

This invention solves the above problems and makes it easier to see not only from the point of view of management and crime prevention but also from the point of safety.
The object of the present invention is to provide a reflective sign board that is applicable to number sign boards for automobiles, road sign boards, etc., and has higher readability and production efficiency.

Means for Solving the Problems In order to solve the above problems, the reflective signboard of the present invention has a high-intensity retroreflective material of either an open lens type or a semi-open lens type installed on the base surface. , and a transparent plate is installed at a predetermined interval in front of the reflective surface of the high-intensity retroreflective material, and a printing layer for marking is provided on one side of the transparent plate, and a peripheral edge of the printing layer for marking is provided on one side of the transparent plate. Section V in section
A light-emitting diode is embedded in the end face of a transparent plate.

Effect With the above configuration, a high-intensity retroreflective material of either an open lens type or a semi-open lens type is attached to the surface of the base, and a transparent transparent material is attached at a predetermined interval in front of the reflective surface of the retroreflective material. Since the plate is installed, an air layer is formed between the transparent glass microspheres on the surface of the high-intensity retroreflective material and the transparent plate, and even when it rains, it is covered with the transparent plate. Because of this, water does not come into contact with the transparent glass microspheres, and the reflective characteristics such as reflected brightness do not change in any way, making it an all-weather reflective sign board.
Since the transparent plate is provided with a printing layer for indicating characters, designs, etc., clear colors, characters, and designs can be visually recognized.

In addition, by providing a groove with a V-shaped cross section on the periphery of the printing layer for markings and embedding a light-emitting diode in the end face of the transparent plate, the light from the light-emitting diode travels through the transparent plate, and the grooves with a V-shaped cross-section The surface emits light, further increasing visibility.

Example Embodiments of the present invention will be described based on the drawings.

FIG. 1 is a schematic cross-sectional view showing a reflective sign plate according to an embodiment of the present invention. In the reflective sign board 1 shown in FIG. 1, a high-intensity open-lens type retroreflective material 3 shown in FIG. 2 is attached to the entire surface of one side of an aluminum substrate 2 having a predetermined shape and size using an adhesive. has been done. Note that instead of the open lens type retroreflective material 3, a semi-open lens type retroreflective material 4 shown in FIG. 3 may be attached. 2 from the surface of the open lens type retroreflective material 3
Transparent plates 11 made of polyacrylic ester resin and having a thickness of 3 mm are arranged in parallel at intervals of mm, and on one side (back side) of the transparent plates 11, a printed layer 12 of letters and designs necessary as a sign board is printed with transparent ink. After forming and drying, engrave grooves 1 with a V-shaped cross section on the periphery of the letters.
3 and a light emitting diode 14 at the outermost periphery.
is arranged. The aluminum substrate 2 to which the retroreflective material 3 is attached and the transparent plate 11 are
The peripheral portions are hermetically fixed with packing fittings 8 at intervals of 3 mm, and an air layer 9 is formed between the retroreflective material 3 and the transparent plate 11. A fixing plate 10 is attached to the rear side of the aluminum substrate 2 for use in fixing the reflective sign plate 1 to a support.

The open type retroreflective material 3 shown in FIG.
The front hemispherical surface 31a of the transparent glass microsphere 31 with a refractive index of 1.7 to 2.0 is exposed in the air, and the rear hemispherical surface 31a is exposed to the air.
A reflective layer 32 is provided directly on b and has a structure buried in a support 33. In addition, the semi-open lens type retroreflector 4 shown in FIG.
3, and a concentric elliptical hemispherical thin film layer 44 made of transparent synthetic resin is formed on the front hemispherical surface 41a.

The reflective sign board 1 has a beautiful luster on the transparent plate 11 made of polyacrylic ester resin on the front.
For example, when used as a car number plate, it has better visibility and excellent reflective performance than conventionally painted number plates or number plate plates made using encapsulated lens-type retroreflective materials. unaffected. Further, the light from the light emitting diode 14 travels through the polyacrylic ester resin of the transparent plate 11 and emits light from the V-shaped surface 13a of the carved groove 13, further increasing visibility.
Visibility is further improved by applying a fluorescent pigment or paint to the surface 13a of the mold.

The reflective sign board 1 of the above embodiment can be used for a wide range of purposes such as a reflective number sign board, various road signs, and others.

Effects of the invention As described above, the reflective sign board of the present invention has a high-intensity retroreflective material of either an open lens type or a semi-open lens type attached to the base surface.
In addition, a transparent plate is installed at a predetermined interval in front of the reflective surface of the high-intensity retroreflective material, and a printing layer for marking is provided on one side of the transparent plate.
It is possible to easily produce the desired sign board without having to perform complicated operations such as embossing, which can easily cause cracks, as in the past.Moreover, it has high reflective performance and very good visibility, and is transparent. The printing layer for markings provided on the board can be either transparent or opaque to improve the visibility effect, and the transparent plate is provided with a groove with a V-shaped cross section, and the surface of the groove with a V-shaped cross section emits light. By doing so, visibility is further improved, and it can be used in a wide range of applications such as reflective number plates for automobiles, various road signs, and other signs, and greatly contributes to traffic safety.

In particular, according to the reflective sign board of the present invention, a transparent plate is installed at a predetermined interval in front of the reflective surface of a high-intensity retroreflective material, and the transparent plate has a cross section V.
By combining the structure of providing a V-shaped groove and emitting light from the surface of the groove with a V-shaped cross section, all the advantages of both can be obtained.By combining these, the amount of retroreflection can be halved, This has the advantage that the amount of light emission does not decrease by half.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view showing a reflective sign board according to an embodiment of the present invention, Fig. 2 is a schematic sectional view of an open lens type retroreflective material, and Fig. 3 is a schematic sectional view of a semi-open lens type retroreflective material. It is a schematic sectional view. DESCRIPTION OF SYMBOLS 1... Reflective sign board, 2... Aluminum substrate (substrate), 3, 4... Retroreflective material, 11... Transparent plate, 12... Printing layer, 13... Engraved groove with V-shaped cross section, 14 ...Light emitting diode.

Claims (1)

[Claims for Utility Model Registration] 1. A high-brightness retroreflective material of either an open lens type or a semi-open lens type is attached to the surface of the base, and a predetermined area is provided in front of the reflective surface of the high-brightness retroreflective material. In addition to installing transparent plates at intervals, a printed layer for marking is provided on one side of the transparent plate, a groove having a V-shaped cross section is provided at the peripheral edge of the printed layer for marking, and a light emitting diode is provided on the end surface of the transparent plate. A reflective sign board characterized by being embedded with. 2. The reflective sign board according to claim 1 of the utility model registration claim, in which a groove with a V-shaped cross section is coated with a fluorescent pigment or paint.