JPH04255802A - Reflecting mirror - Google Patents

Abstract

PURPOSE:To prevent the mirror surface of the reflecting mirror from becoming cloudy by arranging a heat accumulation pack on the reverse surface side of the mirror surface part of a mirror body and arranging plural heat accumulation packs on the reverse surface of the mirror surface of the mirror body while the entire area is covered. CONSTITUTION:The heat accumulation pack 5 consisting of a container 3 which is flexible, a shape holding member 6 which is arranged in the container 3 and impregnable, and a heat accumulating material 4 with which the shape holding member 6 is impregnated is arranged on the reverse surface side of the mirror surface part 2 of the mirror body 1. When outside air temperature is lower than the fusion point of the heat accumulating material 4, the heat accumulating material changes in phase from liquid to solid to discharges latent heat. Further, the mirror surface part 2 of the mirror body 1 is much higher in heat conductivity than the heat accumulating material 4, so the temperature of the mirror surface part 2 of the mirror body 1 never becomes lower than the outside air temperature.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflecting mirror, and more particularly to a reflecting mirror suitable for use as a road reflecting mirror placed on a road or the like in order to ensure safe driving of a vehicle.

0002

2. Description of the Related Art Generally, reflecting mirrors are installed at curved corners of roads to ensure safe driving of vehicles. However, in conventional reflecting mirrors, dew condensation occurs on the mirror surface due to changes in the outside temperature, and the mirror surface becomes cloudy, which may reduce the function of the mirror.

[0003] Therefore, in order to prevent the mirror surface from becoming cloudy,
It has been proposed to embed a heater inside the reflecting mirror body, or to heat the mirror body by introducing groundwater into the reflecting mirror body.

However, these configurations have drawbacks such as high construction costs and limited installation locations. Furthermore, a device has been proposed in which a heat storage material is attached to the back side of the mirror surface portion of the mirror body to heat the mirror body.

[0005] If such a configuration is adopted, it is possible to reduce construction costs and there is no restriction on installation location, but if a material with a high melting point is used as a heat storage material, the heat dissipation temperature will be high. However, due to the daytime outside temperature alone, heat cannot be stored sufficiently, and the material cannot fully perform its function as a heat storage material.

On the other hand, as a heat storage material, it has a low melting point (below 0°C).
If a mirror is used, the efficiency will be poor because heat will be radiated from the state where frost has formed on the mirror surface. Moreover, even if an appropriate heat storage material is used to prevent fogging, the heat storage material becomes a liquid when storing heat and becomes fixed when dissipating heat, so simply attaching the heat storage material to the back side of the mirror surface will cause dew condensation on the mirror surface. cannot be reliably prevented.

That is, the reflecting mirrors shown in FIGS. 6 to 10 are as follows:
A plurality of heat storage packs 25 in which a heat storage material 24 is enclosed in a container 23 are attached to the back side of the mirror surface portion 22 of the mirror body 21. Since the enclosed heat storage material 24 becomes a liquid during heat storage, it is biased in the direction of gravity as shown in FIGS. Therefore, fogging 26 could not be sufficiently prevented.

Therefore, as shown in FIGS. 11 to 13, a heat storage pack 35 obtained by further dividing the heat storage pack 25 is attached to a mirror body 31.
It has been proposed that reflective mirrors are attached to the back side of the mirror surface portion 32 of the mirror. If such a configuration is adopted, it is possible to reduce the deviation of the heat storage material 34 within the heat storage pack 35.

[0009]

[Problems to be Solved by the Invention] However, there is a problem in that it takes time and effort to attach each divided heat storage pack 35 to the back side of the mirror surface portion 32 of the mirror body 31, and the work efficiency is extremely low. Was.

On the other hand, as shown in FIGS. 14 to 16, a heat storage pack 45 in which a heat storage material 44 is sealed in a container 43 is integrally formed, and spot seals 46 each having a diameter of about 10 mm are provided at a plurality of locations. A reflecting mirror in which a bar seal (not shown) of approximately 10 mm x 50 mm is provided in place of the spot seal 46 has been proposed.

However, since the heat storage material 44 is not present at the spot seal 46 or the bar seal, it has not been possible to prevent the fogging 47 around the spot seal 46 and the bar seal.

[0012] An object of the present invention is to provide a reflecting mirror that does not cause dew condensation on the mirror surface even when the outside temperature changes.

[0013]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a flexible container, a shape-retaining member disposed within the container, and having an impregnating property.
A heat storage pack made of a heat storage material impregnated into this shape-retaining member is disposed on the back side of the mirror surface part of the mirror body, and a plurality of This method employs a method in which a heat storage pack is installed.

[0014]

[Operation] By employing the above-mentioned means, the present invention impregnates the heat storage material in the shape retaining member and prevents the heat storage material from shifting in the direction of gravity. Further, since the shape retaining member makes the heat storage pack uniform in thickness and prevents the heat storage material from shifting, it is possible to uniformly prevent fogging of the mirror surface portion.

[0015]

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings. 1 to 5 show embodiments of reflectors according to the invention. As shown in FIGS. 1 to 3, this reflecting mirror has a plurality of heat storage packs 5 disposed on the back side of a mirror surface portion 2 of a mirror body 1, respectively.

As shown in FIGS. 4 and 5, the heat storage pack 5 has a shape retaining member 6 disposed inside the container 3, and the heat storage material 4 is impregnated into the shape retaining member 6. As the heat storage material 4, polyethylene glycol #400 having a melting point of 4 to 6°C and a latent heat of 36 cal/g is used as a material having a melting point of 0 to 10°C. As the container 3, a flexible aluminum laminate or resin laminate is used because the heat storage material 4 changes phase from liquid to solid or from solid to liquid depending on the outside temperature. The shape-retaining member 6 is made of a shape-retaining material that is well impregnated with the heat storage material 4 and has a uniform thickness and hardness, such as a foamed urethane sheet, cardboard paper, or non-woven fabric. It is being

The heat storage packs 5 are respectively disposed on the back surface of the mirror surface section 2 as shown in FIG. In addition, the shape retaining member 6 can maintain the shape of the heat storage pack 5, especially the uniform thickness, and can also absorb the heat storage material 4 in the direction of gravity. This prevents the heat storage material 4 from shifting to one side.

In the above configuration, when the outside temperature is lower than the melting point of the heat storage material 4, the phase of the heat storage material 4 changes from liquid to solid, and the heat storage material 4 releases latent heat. can prevent fogging.

On the other hand, when the outside temperature becomes higher than the melting point of the heat storage material 4, the heat storage material 4 changes phase from solid to liquid and absorbs heat as latent heat, but the mirror surface portion 2 of the mirror body 1 has a much higher temperature than the heat storage material 4. Since the thermal conductivity is high, the mirror surface portion 2 of the mirror body 1 will not become lower than the outside temperature, and the mirror surface portion 2 of the mirror body 1 will not form dew condensation.

Furthermore, since the heat storage material 4 in the heat storage pack 5 is impregnated with the shape-retaining member 6, it does not shift to one side as in the conventional case, and since the thickness is uniform due to the shape-retaining member 6, the mirror surface portion 2. Clouding can be completely prevented.

Furthermore, since the heat storage material 4 is not biased, the heat storage pack 5 can be formed into a large shape with a uniform thickness. 5 can be reduced, and work efficiency is also improved.

[0022]

[Effects of the Invention] With the above configuration, the shape-retaining member impregnates the heat storage material and prevents the heat storage material from shifting in the direction of gravity, thereby completely eliminating fogging of the mirror surface. It can be prevented. In addition, since the heat storage material is not biased, the heat storage pack can be made into a large shape with uniform thickness, and as a result, the number of heat storage packs to be placed on the back side of the mirror surface of the mirror body can be reduced. It has excellent effects such as improved workability.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view showing an embodiment of a reflecting mirror according to the present invention.

FIG. 2 is a schematic front view showing an embodiment of a reflecting mirror according to the present invention.

FIG. 3 is a diagram for explaining a state in which a heat storage pack is disposed in the embodiment of the reflecting mirror according to the present invention.

FIG. 4 is a schematic cross-sectional view of a heat storage pack in an embodiment of a reflecting mirror according to the present invention.

5 is a schematic cross-sectional view taken along line BB in FIG. 4. FIG.

FIG. 6 is a schematic front view showing a conventional reflecting mirror.

7 is a schematic cross-sectional view taken along line CC in FIG. 6. FIG.

FIG. 8 is a diagram for explaining a state in which a heat storage pack is disposed in a conventional reflecting mirror.

FIG. 9 is a schematic cross-sectional view of a heat storage pack in a conventional reflecting mirror.

10 is a schematic cross-sectional view taken along line DD in FIG. 9. FIG.

FIG. 11 is a schematic front view showing a conventional reflecting mirror with an increased number of heat storage packs.

12 is a schematic cross-sectional view taken along line EE in FIG. 11. FIG.

FIG. 13 is a diagram for explaining a state in which the heat storage packs are arranged in a conventional reflecting mirror with an increased number of heat storage packs.

FIG. 14 is a schematic front view showing a conventional reflecting mirror integrally configured with a heat storage pack.

15 is a schematic cross-sectional view taken along line FF in FIG. 14. FIG.

FIG. 16 is a diagram for explaining a state in which the heat storage pack is disposed in a conventional reflecting mirror integrally configured with the heat storage pack.

[Explanation of symbols]

1, 21, 31, 41...mirror body 2, 22, 32, 42...mirror surface part 3, 23, 33, 43...container 4, 24, 34, 44...heat storage material 5, 25, 35, 45...heat storage pack 6...Shape retaining member 26, 47...cloudy 46...Spot sticker

Claims (2)

[Claims] Claim 1: a flexible container (3); a shape-retaining member (6) disposed within the container (3) and having impregnating properties; A heat storage pack (5) consisting of a heat storage material (4) and a mirror body (1)
A reflecting mirror characterized in that it is disposed on the back side of the mirror surface part (2). 2. A plurality of heat storage packs (5) are disposed on the back surface of the mirror surface (2) of the mirror body (1) so as to cover the entire area thereof. reflector.