JPH0548226Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is necessary for transmitting information to drivers, pedestrians, etc. outdoors with accuracy and visibility, such as road signs, construction signs, and guide signs. This relates to variable reflective signs installed at locations.

PRIOR ART Conventionally, box-shaped variable reflective signs have been made of internally illuminated variable signs that are almost non-reflective, and reflective signs come in various types, including up-down, caption, and rotating. Recently, there have been three-variable reflective signs that rotate using each face of a triangular prism. The up-down type of reflective variable sign changes the design by hanging the display board inside the box in the vertical direction and moving it up and down, while the caption type uses a method in which a base plastic film such as polyester is rolled up and down together with a reflective material attached to the caption surface. The rotating type is a method in which two flat cut-outs in a double sign are rotated so that they overlap to change the design. In most cases, these box-shaped variable signs can be changed by 2 to 3 signs.

Problems to be Solved by the Invention As mentioned above, conventional variable signs, with the exception of non-reflective subtitle types, cannot be designed to be more than 2 to 3 variable due to their structure. In addition, subtitle type reflective variable signs are also required to be lightweight in order to reduce energy consumption and utilize solar cells, making it impossible to increase the number of variable reflective signs. Also, there are no known box-shaped internally illuminated signs with variable retroreflectivity.

The present invention solves the above problems, and aims to provide a variable reflective sign that has a large number of variable signs, is lightweight, has high reflective performance, and can be internally illuminated.

Means for Solving the Problems In order to solve the above problems, the variable reflection label of the present invention consists of a large number of microscopic glass spheres with a refractive index of 1.7 or more and a diameter of 500 μm or less, which corresponds to 20 to 60% of the diameter. A reflective layer is formed directly on the spherical surface of the micro glass sphere, and the reflective layer forming part of the micro glass sphere is embedded in an adhesive layer provided in a pattern with an area of 20 to 80% on a light-transmissive milky white plate. The display section is a long transparent film in which a retroreflective section is formed to serve as a reflector, and a plurality of types of display sections made of transparent printed layers are arranged in the longitudinal direction at predetermined intervals in front of the reflector. They are opposed to each other and can be converted freely.

Effect In the above configuration, the reflector used is a light-transmissive milky white plate with a large number of micro glass spheres with a refractive index of 1.7 or more and a diameter of 500 μm or less interposed in an adhesive layer with an area of 20 to 80%, via a reflective layer. Since the structure is such that a retroreflector is formed by being buried, 80 to 20% of the remaining part is light transparent (hereinafter referred to as the aperture), and therefore a fluorescent light is placed behind such a reflector. When a light source such as a light source is installed, the light passes through the opening and produces a lighting effect, and the retroreflective part receives light from the headlight from the front and reflects back, becoming an internally illuminated reflective sign. The transparent film has a display section made of a transparent printing layer facing the front of the container, and the display section can be freely changed to stand out clearly for extremely good visibility. Because it is lightweight, it consumes little energy such as electricity required to change the display, and it is also easy to change the displayed content by changing the various types of display parts as necessary, making it easy to display a variety of information. can be transmitted.

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

FIGS. 1A and 1B show a variable reflective sign according to an embodiment of the present invention, in which A is a front view and B is a schematic sectional view taken along line A--A of A. In Figure 1 A and B, box 1
A transparent glass plate 2 is arranged like a window on the front surface of the transparent glass plate 2, and guide rollers 3a and 3b are arranged in parallel to the width direction of the transparent glass plate 2 at the upper and lower parts of the back side of the transparent glass plate 2 inside. , this guide roller 3a,
Winding rollers 5a and 5b for winding up a long transparent film 4 made of polyester are provided in parallel behind the guide roller 3b, and the transparent film 4 is wound around the guide roller 3.
a, 3b to face the transparent glass plate 2 in parallel, and manually or electrically drive the winding rollers 5a, 3b.
5b so that it can be rolled up and run freely in the vertical direction. The transparent film 4 is formed with a plurality of types of display parts 4A made of transparent printed layers arranged in the longitudinal direction, and by running the transparent film 4 up and down as described above, the transparent glass plate Display unit 4A facing the back of 2
types can be easily changed. On the back side of the transparent film 4, reflectors 6 are arranged parallel to each other at an interval of 2 mm and have a flat plate shape and have approximately the same area as the transparent glass plate 2, and on the back side of the reflector 6, for example, a 30W circuit is installed. A light source 7 such as a Klein fluorescent lamp is installed. The reflector 6 is made of polyacrylic acid ester synthetic resin and has a thickness of 4 as shown in FIG.
A total area of 50 mm is applied to a milky white 6A surface with optical transparency of 50 mm.
% of the retroreflective part 6B with an area of 4 mm on each side.
It is formed in a checkered pattern, and is retroreflected by the retroreflection part 6B having an area of 50%, and at the same time is transparent to light by the opening of the milky white plate 6A having an area of the remaining 50%. As shown in FIG. 3, the retroreflective portion 6B includes a large number of transparent microscopic particles with a refractive index of 1.92 and a diameter of 50 to 60 μm on an acrylic-urethane heat-press adhesive layer 8 on the surface of the milky white plate 6A. The glass bulb 9 is formed into a hemispherical surface corresponding to approximately 50% of its diameter and has a thickness of 800 mm by vacuum evaporation of aluminum.
It is formed into a high-brightness open-lens type with a buried structure through a reflective layer 10 of 100 Å.

The reflector 6 can be manufactured, for example, as follows. That is, a low-density polyethylene film with a thickness of 35 μm is laminated on a polyester film with a thickness of 75 μm, the micro glass spheres 9 are scattered on the surface of this low-density polyethylene film, and the low-density polyethylene film is heated at 110° C. for 8 minutes. A hemispherical portion corresponding to about 50% of the diameter of the micro glass sphere was temporarily buried in a layer of polyethylene film, and aluminum was vacuum-deposited on the exposed surface of the micro glass sphere to form a reflective layer 10 with a thickness of 800 Å. On the surface of this reflective layer 10, an acrylic-urethane thermocompression type adhesive was applied in a checkered pattern as shown in Fig. 2 using a silk screen method, so that one square with a side of 4 mm was formed. A thermocompression type adhesive layer 8 having a thickness of 50 μm was formed. This adhesive-coated sheet and a 4 mm thick light-transmitting milky white plate 6A made of polyacrylic acid ester synthetic resin were stacked together using a hot pressure bonding machine.
After heating and pressing at ℃ for 5 minutes, the laminate of the polyester film and the low-density polyethylene film was removed, and the retroreflective part 6B with the schematic cross-sectional structure shown in FIG. 3 was formed with the pattern shown in FIG. 2. A formed reflector 6 is obtained.

In the variable reflective sign described above, the light from the light source 7 passes through the milky white plate 6A at the opening of the reflector 6, increasing the visibility of the display section 4A made of a transparent print layer provided on the transparent film 4, and A reflector 6 is used for the light emitted from the transparent film 4 and
It is retroreflected with high brightness by the retroreflection part 6B of
It serves as an internally illuminated reflective sign to further improve visibility, and even when the light source 7 is not lit due to a failure or the like, the contents of the display section 4A can be clearly displayed and communicated by retroreflection. Reflection performance value is observation angle
At an incident angle of 0.2° and an incident angle of 5°, it showed 225 cd/1x/m ² , and the sign surface illuminance during internal illumination was 2200 lux, indicating that it functioned very well as a sign. In addition, the winding rollers 5a and 5b are rotated to move the transparent film 4 up and down, so that various types of display parts 4 can be displayed.
A can be easily converted to change the displayed content. Since only the transparent film 4 is moved up and down, it is lightweight, flexible and strong, has good dimensional stability, can be used for a long time without deformation such as stretching or shearing, and can be used with electricity etc. Energy consumption is also low. Since the display contents can be changed by changing the display contents of various types of display parts 4A, it is possible to reduce the number of signs erected in urban areas, maintain the aesthetic appearance, and improve the information transmission function.

In the above embodiment, the retroreflection part 6B of the reflector 6 was formed into a high-intensity open lens type using the micro glass spheres 9 with a refractive index of 1.92 as shown in FIG. refractive index as shown in
Using 2.0 to 2.3 micro glass spheres 11, a portion of the reflective layer 12 formed by vacuum-depositing aluminum directly on the hemispherical surface of approximately 50% of the diameter of the micro glass sphere 11 is buried in the adhesive layer 8, and the remaining portion is It may be formed into a high brightness semi-open lens type in which a concentric elliptical hemispherical shell-shaped thin film layer 13 of transparent synthetic resin is provided on a hemispherical surface.
It exhibits the same effect as the open lens type shown in FIG. Furthermore, although the retroreflective portion 6B of the reflector 6 is provided on 50% of the entire surface, the area of the retroreflective portion 6B can be set to 20% depending on whether weight is placed on the internal illumination function or the retroreflective function as a sign. ~80
If it is less than 20%, the retroreflection function will be low, and if it exceeds 80%, the light transmittance will decrease and the illuminance of internal illumination will be low, and both are inappropriate. Further, in the above embodiment, the transparent film 4 is moved up and down to change the display section 4A, but it may be moved left and right.

Effects of the invention As described above, the variable reflective sign of the present invention receives light from a headlight from the front, and the retroreflective part of the reflector retroreflects the display part made of the transparent printed layer facing the front. It is a reflective sign that clearly highlights the display part that can be freely changed, which is an array of transparent films, and improves visibility.In addition, by installing a light source behind the reflector, light passes through the opening of the reflector, and the transparent film becomes visible. By illuminating the display part of the film to improve its visibility, it becomes a so-called internally illuminated reflective sign, which has extremely good visibility of the display part, and can be converted to many types of display parts to change the display contents in a variety of ways. In addition, since only the transparent film is moved when changing the displayed content, it is lightweight, flexible, and strong, and does not deform, consumes less energy and can be used for a long time, preserving the aesthetic appearance of urban areas and improving information transmission functions. It greatly contributes to

[Brief explanation of the drawing]

Figures 1A and 1B show a variable reflective sign according to an embodiment of the present invention. FIG. 3 is a schematic sectional view showing an example of the retroreflective part of the reflector, and FIG. 4 is a schematic sectional view showing another example of the retroreflective part of the reflector. 4...Transparent film, 4A...Display section, 6...
Reflector, 6A... Milky white plate, 6B... Retroreflector, 9, 11... Micro glass bulb, 10, 12...
reflective layer.

Claims (1)

[Scope of utility model registration request] A reflective layer is formed directly on the spherical surface of a portion corresponding to 20 to 60% of the diameter of a large number of micro glass spheres with a refractive index of 1.7 or more and a diameter of 500 μm or less, and the reflective layer forming portion of the micro glass spheres is made light transmissive. A high-intensity retroreflective part is embedded in an adhesive layer provided in a pattern with an area of 20 to 80% on a milky white plate to form a reflector, and is placed at a predetermined interval in front of the reflector. . A variable reflective sign comprising a long transparent film in which a plurality of types of display parts made of transparent printing layers are arranged in the longitudinal direction, and display parts of a long transparent film are made to face each other in a convertible manner.