JPH0412092Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a stud-shaped road signal device installed on the ground surface.

[Conventional technology and its problems] Equipped with a solar cell, a storage battery, and a light emitting diode, the electromotive force of the solar cell is charged to the storage battery when the surrounding environment is bright, such as during the day, and when the surrounding environment is dark, such as at night. Japanese Utility Model Publication No. 57-61137 discloses a road signal device that detects that the electromotive force of the solar cell has decreased and activates a switching circuit to light up a light emitting diode using the power of a storage battery charged during the day. As already known from others, this type of ground-mounted road signal device has the following problems. That is, since the temperature difference between summer and winter on the road surface is very large, the gaskets and the like are likely to deteriorate and rainwater is likely to enter the road surface. Therefore, electrical systems such as storage batteries and light/dark sensitive switching circuits may be prone to leakage and failure due to the infiltration of rainwater. Another problem was that the storage battery could become overheated during high temperatures in the summer, easily causing malfunction. Another problem was when the electric circuit malfunctioned due to the impact.

[Means for solving the problem] The present invention was devised in view of the above-mentioned problem, and as a specific means for solving the above-mentioned problem, a cylindrical part is provided in the center of the lower surface of the rivet body. The storage battery and the switching circuit board are installed in the cylindrical part, while an aluminum die-cast embedded container with an open top is placed in the ground so that the top opening is aligned with the ground surface. The stud body is placed over the top opening of the implant container so that the cylindrical part hangs down inside the implant container, and is bolted, It is made by filling without gaps a liquid silicone resin that has fluidity within a temperature range.

[Function] Even if rainwater enters from the outside, the liquid silicone resin will sink to the bottom of the embedded container. Furthermore, the silicone resin has excellent insulation and heat resistance, and its fluidity causes convection within the embedding container to prevent local overheating within the embedding container. The silicon layer also weakens the shock waves that the stud receives, thereby protecting the circuit.

[Example] Hereinafter, an example of the ground-mounted stud-type road signal device of the present invention will be described with reference to the drawings.

FIG. 1 is an external perspective view of this signal device. The stud body 1 is formed by aluminum die-casting into a short quadrangular truncated pyramid shape, and rectangular window holes opened on the four side walls of the stud body 1 are equipped with red or yellow reflectors 2.
is loaded. The reflector 2 is molded from transparent synthetic resin, has a flat surface, and has a large number of three orthogonal reflecting surfaces that form one corner of a cube arranged in parallel regularly on the back, and reflects light incident from the surface. This is a well-known method that reflects light in the direction of incidence. A quadratic resin lens 3 is embedded in a part of the reflector 2, and high-intensity light emitting diodes 4 that emit red or yellow light are mounted at the focal positions of the resin lenses 3, respectively.
Reference numeral 5 denotes a housing that serves as a cushioning material for holding the reflector 2.

On the other hand, a frame-shaped raised edge 6 is formed on the upper surface of the stud main body 1, and a solar cell 8 is placed in the area surrounded by a rubber cushioning material 7. 9
is a convex lens-shaped transparent plate superimposed on the surface of the solar cell.

A rectangular cylindrical part 10 is integrally formed hanging from the center of the lower surface of the rivet main body 1, and a storage battery 11 and a switching circuit board 12 are mounted in the cylindrical part 10.
The storage battery 11 is a sealed type such as a nickel cadmium battery, and stores the electromotive force of the solar cell 8 during the daytime. The switching circuit board 12 switches between the solar cell 8 and the storage battery 11 during the day when the solar cell 8 has sufficient electromotive force.
In addition, when the electromotive force of the solar cell 8 is low such as at night, the light emitting diode 4 is connected to the storage battery 11.
The light emitting diode 4 is turned on using the storage battery 11 as a power source. Note that when installing the storage battery 11 and the switching circuit board 12 into the cylindrical part 10, these parts are first placed on the light emitting diode 4 and the solar cell 8, respectively, and then the stud body 1 is installed.
Turn the storage battery 1 upside down and place it inside the cylindrical part 10.
1. It is housed with the switching circuit board 12 and filled with a solid insulating material such as silicone resin or synthetic rubber that hardens at room temperature.

Reference numeral 13 denotes an aluminum cast embedding container with an open top surface, a seal member 15 is attached to the edge of the top surface opening 14, and screw holes 16 are formed in the four corners. The buried container 13 is buried in the ground so that the upper opening 14 is flush with the ground surface. Then, the tack main body 1 is connected to the cylindrical portion 10 of the embedding container 13.
At the same time, the bolts 17 inserted into the four corners of the rivet body 1 are screwed into the screw holes 16, and the rivet body 1 is inserted into the embedding container 13. It is removably fixed to the containing container 13. The embedding container 13 is filled with silicone resin 18, which has a specific gravity of less than 1 and is liquid in a wide temperature range (-60°C to 250°C), without any gaps. In addition, when the cylindrical part 10 is suspended into the embedded container 13, there is a slight gap between the lower end of the storage battery 11 and the inner bottom surface of the embedded container 13. Similarly, there is a slight gap between the lower end of the switching circuit board 12 and the inner bottom surface of the embedding container 13, so that these parts are not inserted into the embedding container 13 so that they do not come into contact with the inner bottom surface of the embedding container 13. The depth dimension of the container 13 is set.

In the ground-mounted road signal device constructed in this manner, the electromotive force of the solar cell 8 during the day is stored in the storage battery 11, and at night the light emitting diode 4 is lit using the power of the storage battery, and the light from the light emitting diode 4 is directed to the horizontal surface. The light is emitted in a direction similar to that of a road surface that is slightly upward, making the light visible even from a distance.
In addition, if an extremely overheated area occurs in the storage battery 11 or the switching circuit board 12, especially during high temperatures such as in the summer, the liquid silicone resin 18 sealed in the embedded container 13 will convect and dissipate that heat into a highly thermally conductive material. The heat is transferred to and dissipated to the aluminum die-cast embedded container 13, thereby preventing failures due to overheating of these embedded parts. In addition, if the sealing member 15 is damaged due to long-term use and rainwater intrudes into the embedded container 13, the rainwater will sink to the bottom of the embedded container 13, and the silicone resin 18 will convert the rainwater into water vapor into the storage battery. 11, switching circuit board 12, etc., even if a small amount of water floods, this will not immediately cause leakage in the storage battery 11, switching circuit board 12, etc. Since the storage battery 11 has a lifespan of 2 to 3 years, it is necessary to periodically loosen the bolt 17, remove the stud body 1 from the embedded container 13, and replace the storage battery 11.

[Effects of the invention] As described above in the embodiments, according to the invention, the liquid resin filled in the embedding container, which has a specific gravity of less than 1, is lighter than water, and has fluidity, is absorbed into the cylindrical part of the stud body. Since the storage battery, switching circuit board, etc. attached to the solar cell are protected from overheating and water leakage, the signal device powered by the solar cell can be used for a long period of time without fear of failure.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is an external perspective view, FIG. 2 a is a sectional view taken along the line X-X in FIG. 1, and FIG. FIG. DESCRIPTION OF SYMBOLS 1...Tack body, 2...Reflector, 3...Resin lens, 4...Light emitting diode, 8...Solar cell, 10...Cylindrical part, 11...Storage battery, 12...
Switching circuit board, 13... Embedded container, 15... Sealing member, 16... Screw hole, 17... Bolt, 18
...Silicone resin.

Claims (1)

[Scope of utility model registration request] A reflector and a light emitting diode are provided on the four side walls of a truncated square tack body, and a solar cell is placed on the top surface of the tack body, and the electromotive force of the solar cell is temporarily charged into a storage battery, and the light emitting diode is lit. A tack-type road signal device, wherein a cylindrical part is integrally formed in the center of the lower surface of the tack body, and a switching circuit board for controlling lighting of the storage battery and the light emitting diode is mounted in the cylindrical part, An aluminum die-cast container with an open top is buried in the ground so that the top opening is flush with the ground surface.
The tack main body is placed over the top opening of the implantation container so that the cylindrical part hangs inside the implantation container, and is bolted;
A ground-mounted stud-type road signal device, characterized in that the embedded container is filled with a liquid silicone resin having a specific gravity of less than 1 and fluidity over a wide temperature range without any gaps.