JPH07229113A - Reflection mirror for road - Google Patents

Abstract

PURPOSE:To provide a reflection mirror for a road which is furnished with defogging performance without using a heating element. CONSTITUTION:A frame 2 is fitted to an outer peripheral edge of a reflection mirror base material 1 of which a surface is made specular. The frame 2 is fixed to a post 4 via support rods 3 in such a state that at least a part on a rear face 12 side of the reflection mirror base material 1 is exposed. With this constitution, not only a surface side but also the rear face 12 side of the reflection mirror base material 1 is exposed to ambient atmosphere to rapidly bring temperature of the reflection mirror base material 1 into an equilibrium condition with the ambient atmosphere so as to rapidly eliminate dewing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road reflector having an antifogging property.

[0002]

2. Description of the Related Art Generally, a concave or convex reflecting mirror is installed at a corner of a road or where visibility is poor so as to ensure traffic safety such as traveling of vehicles and passage of pedestrians. In the conventional reflecting mirror, as shown in FIG. 4, the back side of the reflecting mirror a is closed by a back plate b to form a space c between the back side of the reflecting mirror a and the back plate b, and the back plate is formed. In most cases, b is attached to the column d.

[0003]

However, in the conventional reflecting mirror as described above, especially at night or in cold weather, the mirror surface is likely to be condensed due to the temperature difference between the outside temperature and the reflecting mirror, and therefore the mirror surface is fogged. The function as a reflecting mirror sometimes deteriorated. Condensation as a cause of the fogging of the mirror surface occurs because the temperature of the reflecting mirror becomes lower than the dew point of the surrounding air. Therefore, a heating element or the like is attached to the back side of the reflecting mirror and the reflecting mirror A reflector that prevents condensation by warming the temperature of the reflector and raising the temperature of the reflector to the temperature of the surrounding air has also been proposed, but such a reflector has a complicated structure and causes the heating element to generate heat. It was not possible to install it easily because of the need for a power source for the equipment.

Therefore, the present invention solves the above problems,
An object of the present invention is to provide a road reflecting mirror having antifogging property without using a heating element or the like.

[0005]

The inventor of the present invention has earnestly studied how to provide an anti-fogging property to a conventional reflecting mirror without using a heating element. The present invention has been completed from the knowledge that the space formed between the back plate and the back plate is largely caused by the occurrence of dew condensation, and that the dew condensation can be quickly removed by eliminating the space. . That is, the road reflector according to the present invention, a frame is attached to the outer peripheral edge of the reflector base material whose surface is a mirror surface, in a state in which at least a part of the back surface side of the reflector base material is exposed, It is characterized in that the frame body is fixed to a column through a supporting rod.

The greatest feature of the present invention resides in that at least a part of the back surface side of the reflector substrate is attached to the support column in an exposed state. To prevent condensation, it is sufficient to expose the reflector to the surrounding air and quickly bring the temperature of the reflector into equilibrium with the temperature of the surrounding air.However, the surface side of a conventional reflector is in direct contact with the surrounding air. However, since the space on the back side is not in direct contact with the surrounding air due to the presence of the space, it was difficult for the temperature of the surrounding air to be transmitted from the back side of the reflecting mirror because of the space. Therefore, it took time for the temperature of the reflecting mirror to reach an equilibrium state with the temperature of the surrounding air, so that dew condensation was not easily removed. Therefore, in the present invention, by mounting the back side of the reflecting mirror base to the support column, the back side is also exposed to the ambient air to quickly bring the temperature of the reflecting base into equilibrium with the temperature of the surrounding air. Then, the dew condensation is quickly removed to provide anti-fogging property.

[0007]

According to the road reflector of the present invention, the back side of the reflector base is exposed and attached to the support, and the back side as well as the front side of the reflector base is exposed to the ambient air. Therefore, the temperature of the reflecting mirror substrate can be quickly brought into equilibrium with the temperature of the surrounding air, so that the dew condensation can be quickly removed and the anti-fog property can be provided.

[0008]

Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a rear view showing an embodiment of the road reflector of the present invention, and FIG. 2 is a cross-sectional view of the embodiment of FIG. 1, and FIG.
FIG. 2 is a vertical sectional view of the embodiment shown in FIG. 1-3,
Reference numeral 1 is a reflector substrate, 2 is a frame, 3 is a support rod, and 4 is a support.

The reflecting mirror substrate 1 is made of a synthetic resin such as acrylic, a metal such as stainless steel, or other glass having a mirror surface formed on the surface 11 side, and is quickly in equilibrium with the temperature of the surrounding air. For this reason, it is preferable to make it from stainless steel, which has good heat conduction and excellent rust prevention effect. The mirror surface formed on the surface 11 side of the reflecting mirror substrate 1 may be formed by directly mirror-polishing the surface 11 of the reflecting mirror substrate 1, or a mirror surface body such as acrylic, stainless steel, or glass is reflected. It may be formed by being laminated on the surface 11 of the mirror substrate 1, and is not particularly limited.

The shape of the reflecting mirror substrate 1 is generally round or square, and the dimensions of the round mirror are φ600 and φ.
800, φ1000mm, 450 × 600m for square type
m, 600 × 800 mm is common, and the radius of curvature of the mirror surface is 1500, 2200, 3000 mm or 360
A convex mirror of 0 mm or more is common.

Next, the frame body 2 is attached to the outer peripheral edge of the reflecting mirror base material 1, and is generally made of metal such as aluminum, which is excellent in workability and strength, or fiber reinforced synthetic resin. As shown in FIG. 3, an eaves 21 made of synthetic resin such as polycarbonate or fiber reinforced synthetic resin is appropriately attached to the upper portion of the front surface of the frame body 2 so that rainwater, dust, dust, etc. do not adhere to the reflecting mirror base material 1. It is done like this. Further, the frame body 2 is attached to the reflecting mirror base material 1 by appropriate means such as adhesion, fitting and screwing.

The supporting rod 3 is for attaching the reflecting mirror base material 1 to the support column 4, and one end portion thereof is the frame body 2.
Is attached to the outer peripheral portion of the column by suitable attaching means such as screws and welding, and the other end is attached to the column 4 via an attachment tool 5 attached to the column 4. The back surface 1 of the reflector substrate 1
The reason why the support rod 3 is not directly attached to the 2 is that when the support rod 3 is directly attached to the back surface 12, the mirror surface of the front surface 11 is distorted. In the present embodiment, four support rods 3 are attached in a substantially cross shape, but the number thereof is appropriately determined in consideration of the size, weight, etc. of the reflector substrate 1. Further, the support rod 3 is exposed on the back surface 12 side of the reflector substrate 1,
It is preferably formed from a narrow plate-like body so that it is exposed to ambient air as much as possible. The back surface 1 of the reflector substrate 1
The exposure ratio on the second side is not particularly limited, and is appropriately determined in consideration of the thermal conductivity of the material of the reflector substrate 1 used.

The fixture 5 is composed of an enclosing portion 51 having a substantially circular cross-section that encloses the support column 4, and brim-like tightening portions 52 and 53 formed at both ends of the enclosing portion 51. The parts 52 and 53 are tightened with bolts 54 and nuts 55 to be fixed to the column 4. The support rod 3 is
The end of the support rod 3 may be directly attached to the column 4 or the fixture 5 by welding, screws or the like, but in the present embodiment, the end of the support rod 3 is arranged on the back surface 12 side of the reflector substrate 1. Mounting plate 6
Mounting piece 61 that is mounted on the
Is clamped and attached to one tightening portion 53 of the fixture 5. A guide pin 62 is provided upright on the side surface of the mounting piece 61, and the guide pin 62 is attached to the tightening portion 53.
By sliding along the guide hole 56 formed in the column, the mounting angle of the reflecting mirror substrate 1 with respect to the column 4 can be arbitrarily set. The size of the mounting plate 6 is preferably as small as possible with respect to the reflector substrate 1 so that the back surface 12 side of the reflector substrate 1 is sufficiently exposed to the ambient air.

Next, in order to confirm the effect of the present invention, the following measurement was performed.

First, as an example, a reflector for a road according to the present invention as shown in FIGS. 1 to 3 was prepared by using a reflector base material made of stainless steel and having a diameter of 600 mm, and exposing the back side of the reflector base material. As a comparative example, a conventional road reflector as shown in FIG. 4 in which the back side of the reflector base material is closed with a back plate to form a space between the back side and the back plate of the reflector. It was made.

Next, the above samples were left at -30 ° C. for 3 hours to sufficiently cool both samples, and then quickly taken out to 2
Observing how the state of dew condensation occurring on the mirror surface of both of these samples changes with time immediately after being taken out in the shade at 4 ° C., and immediately after being taken out, the results are shown in Table 1. It was shown to.

[0018]

[Table 1]

As is clear from Table 1, in the embodiment, 24
Dew condensation on the mirror surface began to disappear after 4 minutes of natural exposure in the shade at 0 ° C, and disappeared completely after 6 minutes, whereas dew condensation still remained in the comparative example. Therefore, it was confirmed that the example has a dew condensation-removing effect in an extremely short period of time as compared with the comparative example, and is excellent in antifogging property.

[0020]

As described above in detail, according to the road reflector of the present invention, the dew condensation on the mirror surface is quickly removed, so that the anti-fogging property is excellent and the function as the reflector is not impaired. Moreover, since a heating element or the like as in the past is not attached, it can be easily installed anywhere.

[Brief description of drawings]

FIG. 1 is a rear view showing an embodiment of a road reflector of the present invention.

2 is a cross-sectional view of the embodiment of FIG.

FIG. 3 is a vertical sectional view of the embodiment shown in FIG.

FIG. 4 is a vertical sectional view showing a conventional road reflector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reflector base material 11 Front surface 12 Back surface 2 Frame body 3 Supporting rod 4 Support post 5 Mounting tool 51 Enclosing part 52 Clamping part 53 Clamping part 6 Mounting plate 61 Mounting piece

Claims (1)

[Claims] 1. A frame is attached to an outer peripheral edge of a reflecting mirror base material having a mirror surface, and the frame body is supported by a supporting rod in a state where at least a part of a rear surface side of the reflecting mirror base material is exposed. A reflector for roads, which is fixed to a pillar via.