JP2923287B1 - Light reflector for road sign - Google Patents

Abstract

An object of the present invention is to provide a road sign light reflector having a structure in which both a reflecting surface and a transparent portion have durability enough to withstand long-term use and can be manufactured at low cost. SOLUTION: A leg portion 2 is integrally formed on the back surface of a main body portion of a glass light reflector 1, and a large number of spherical crown-shaped light reflections are formed around the bifurcated leg portion 2 and the main body portion and on a concrete contact surface on the back surface. The surface 3 is formed integrally, and the crown-shaped light reflecting surface 3 is a road sign light reflector formed at a predetermined height so as to protrude toward the concrete side. And the back surface is embedded in concrete 4 and used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light reflector for a road sign which is used in a state of being installed on a curb or a road surface, and which can be identified by a road user by reflected light.

[0002]

2. Description of the Related Art In general, a light reflecting structure in which glass beads having a diameter of about 1 mm or less are adhered to a base material such as concrete via an adhesive or a paint, or a mixture obtained by mixing glass beads in a paint is applied to a molded product. There is known a road sign light reflector embedded in a part of a base material (Japanese Utility Model Laid-Open No. 58-72209). This is used for displaying road studs and other marking components indicating curbstones and curbstones.

[0003] By the way, light reflectors for road signs are generally used outdoors in a state where they are exposed to sunlight, wind and rain.
Adhesion of glass beads to the surface of a substrate such as concrete is not durable, and if used for a long period of time, the adhesive loses its adhesive strength and the glass beads fall off, lowering the light reflectance and reducing visibility There was a problem of doing.

In order to cope with such a problem, a conventional example shown in FIG. 6 (Japanese Patent Laid-Open No. 63-197705) discloses a method of forming a reflecting surface inside a groove-shaped concave portion of a block-shaped concrete 10. The glass beads 11 are adhered so as to cover the glass beads, and the transparent synthetic resin 12 is filled thereon, thereby making it possible to prevent the glass beads 11 from falling off.

[0005]

However, such a road sign light reflector may be damaged when dust or the like comes into contact with the surface of the synthetic resin covering the glass beads, and when the synthetic resin is exposed to sunlight ( (UV light), the transparency was easily lost, and there was no durability to maintain the required amount of light reflection for a long period of time. In addition, since such a light reflector uses a plurality of materials to form the reflection surface, there is a disadvantage in terms of manufacturing cost.

Accordingly, an object of the present invention is to solve the above-mentioned problems, and to provide a road sign light reflector with durability that can withstand long-term use of both the reflection surface and the transparent portion, and at a low cost. The structure is to reduce the number of parts that can be manufactured.

[0007]

In order to solve the above-mentioned problems, the invention of the present application is a road sign light reflector used by embedding and fixing a part of a glass light reflector in concrete. The light reflector for a road sign is provided with a spherical crown-shaped light reflecting surface protruding toward the concrete on the concrete contact surface of the light reflector for a road sign.

Alternatively, in the light reflector for a road sign having the above-mentioned structure, a structure is employed in which the light reflecting surface in the shape of a sphere has a protruding height of about one-third or less of the diameter of the sphere.

The light reflector for a road sign of the present invention constructed as described above is durable to withstand long-term use since both the reflection surface and the transparent portion are made of glass.

[0010] When light incident from the outside through the non-concrete contact surface reaches the spherical crown-shaped light reflection surface in contact with the concrete, the light is reflected on the white-colored concrete. Therefore, there is no need to separately form a reflective layer such as an aluminum vapor-deposited film on the surface of the crown. That is, since the spherical crown-shaped light reflecting surface is integrally provided with the same glass as the glass light reflector, the light reflector for road signs can use the concrete surface as the light reflecting surface.

In addition, the road sign light reflector in which the crown-shaped light reflecting surface is formed so as to have a projecting height of about 1/3 or less of the diameter of the sphere is provided with respect to the cut surface of the sphere forming the crown. Thus, the amount of light retroreflection is small even for incident light from an oblique direction of 45 ° or more, and the light reflector for road signs can detect light approaching from a distance from a distant place from a distant position.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 1 to 3, in the embodiment, a bifurcated long plate-like leg 2 is integrally formed on the back surface of a main body of a glass light reflector 1 having a rectangular plate-like front surface, and the bifurcated leg portion is formed. A large number of crown-shaped light reflecting surfaces 3 are integrally formed on the concrete contact surface (adhesion surface) around the body portion and the back of the body portion, and the spherical crown-shaped light reflecting surface 3 is formed so as to protrude toward the concrete side. This is a light reflector for a road sign formed at a protruding height of 2. The periphery of the bifurcated leg 2 and the main body and the back thereof are embedded in and fixed to the block-shaped concrete 4.

The glass used for the light reflector usually does not need to be particularly limited in its material, but it is preferable to use a glass material having good transparency in order to improve the reflection efficiency. In this case, it is preferable to use a translucent glass material having translucency for part or all of the light reflector.

The shape of the leg portion 2 is not limited to the illustrated long plate-shaped bifurcated shape, but may be any other well-known projection that can be prevented from falling off when buried in the concrete 4. Such a leg portion 2 may be provided on a surface other than the back surface. If the adhesiveness between the light reflector main body and the concrete 4 is sufficient, a light reflector (not shown) without the leg portion 2 is particularly provided. ) Can also be configured.

As shown in FIG. 4 in an enlarged manner, the spherical crown-shaped reflecting surface 3 can be integrally formed by a molding die when the main body of the light reflector is melt-molded with glass. Are used for road sign light reflectors (curbs, safety barriers,
Road surface display). As shown in the figure, a road sign light reflector formed to have a projection height of about 1/3 or less of the diameter r of the sphere (for example, 1/4 or more and 1/3 or less) is particularly suitable for a sphere forming a crown. The amount of light retroreflection is small even for incident light from an oblique direction of θ = 45 ° with respect to the cut surface of the vehicle, and the light of another vehicle approaching from a distance in the oncoming lane can be detected from a considerable distance, and the curb Applicable to road sign light reflector.

If such a light reflector is installed on a curb or the like of a road having a sharp curve, the position of the curb can be determined by an oncoming vehicle from a considerable distance, and thus it is thought that it contributes to prevention of collision accidents between cars. Thus, it is possible to provide a road sign light reflector having excellent safety, or to provide a curbstone in which the light reflector is embedded.

In particular, when used without limiting the above-mentioned applications, the height of the projection of the spherical crown-shaped reflecting surface 3 is set to be more than の of the diameter of the sphere and about 球 or less. For example, it is preferable to provide a road sign light reflector in which both the light retroreflection amount and the light diffuse reflection amount are balanced.

As shown in FIG. 5, the light reflector 1 for a road sign of the above-described embodiment is embedded and fixed by exposing a smooth surface (front) of a main body portion on a side surface of a curb 5 made of concrete. Can be. As a method of fixing the light reflector to such a curb, a road sign light reflector is temporarily fixed in advance inside a concrete molding die, and then a raw material having fluidity is formed in the molding die. A so-called composite molding method in which concrete is poured and hardened can be adopted.

When the manufactured curb 5 buried in the light reflector for road sign is installed on the boundary between the road and the sidewalk, the light incident from the exposed surface reaches the spherical-shape light reflecting surface of the glass main body. The light reflects off the white-colored concrete to inform the driver of the car about the boundary between the road and the sidewalk,
And when the road is curved, it informs the degree of the curve.

[0020]

As described above, the invention of the present application is a road sign light reflector in which a spherical crown-shaped light reflecting surface is provided on the concrete bonding surface of a glass light reflector. Since both the reflection surface and the transparent portion are made of glass, there is an advantage that the light reflector for road signs has a durability that can withstand long-term use, and can be manufactured at low cost.

Also, the road sign light reflector having the spherical crown-shaped light reflecting surface formed at a predetermined projecting height is a road sign light reflector capable of detecting light approaching from a distance from a distant position, Particularly, there is an advantage that the safety is excellent as a light reflector for curbstones or roads.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of a road sign light reflector.

2A is a rear view of an embodiment of a road sign light reflector, and FIG. 2B is a plan view of an embodiment of a road sign light reflector.

FIG. 3 is a cross-sectional view of an embodiment of a light reflector for a road sign in use;

FIG. 4 is an explanatory view of a light reflection mechanism of a spherical crown-shaped light reflection surface.

FIG. 5 is a perspective view of a curb explaining a use state of the embodiment.

FIG. 6 is a cross-sectional view of a state of use of a conventional road sign light reflector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Light reflector 2 Leg part 3 Spherical crown-shaped light reflection surface 4, 10 Concrete 5 Curb 11 Glass beads 12 Synthetic resin

Claims (1)

(57) [Claims] 1. A road sign light reflector used by embedding and fixing a part of a glass light reflector in concrete, wherein the road sign light reflector has a smooth surface exposed and
A light reflector for a road sign, wherein a spherical crown- shaped light reflecting surface integrally formed with a lath is provided on a concrete side so that a height of not more than 1/3 of a diameter of the sphere protrudes.