JPH0317364Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a cable illumination (nighttime illumination) device used for cable-stayed bridges, suspension bridges, suspended roofs, etc.

(Prior Art) Conventionally, incandescent lamps or mercury lamps have been used to illuminate cables used in cable-stayed bridges, suspension bridges, suspended roofs, and the like. As a specific example, an illumination installed on a cable-stayed bridge will be explained.

In the cable-stayed bridge in Figure 6, 101 is a girder;
102 is a tower, and from the top of this tower 102 there is a column 1.
Multiple cables are connected to 01. Among these cables, incandescent lamps 104 are attached to the uppermost cable 103 at regular intervals, the details of which are shown in FIG. Incandescent lamp 104 is in protective case 1
05, and this protective case 1.
05 to the cable 103 by the mounting band 106.
hanging on.

Although there are other lamps using mercury lamps or fluorescent lamps, the above-mentioned incandescent lamps, which do not require a discharge device, are commonly used. by the way,
Such incandescent lamps (including mercury lamps and fluorescent lamps) had the following drawbacks.

(a) Because it is made of glass, it is easily damaged.

(b) Because the filament is made red hot in a vacuum and the heat energy is used as a light source, it is necessary to create a vacuum inside the glass, which increases the shape and mass (for example, the incandescent lamp 10 of the cable-stayed bridge mentioned above).
4 is larger than the diameter of cable 103).

(c) Due to its large shape and mass, the cable is prone to sagging and vibration.

(d) High power consumption and short lifespan.

There are two main reasons for the above drawbacks: (1) being made of glass, and (2) emitting light due to heat generation.

Therefore, in order to eliminate the above-mentioned drawbacks, it is conceivable to use light emitting diodes, which have been conventionally used in road guidance signs, etc., as a light source for illumination. As will be described in detail later, this light emitting diode is made of plastic and is characterized by plasma discharge, so that the drawbacks of the above-mentioned incandescent lamp can be overcome. However, simply replacing the diode with a diode does not solve the drawbacks, and it is difficult to use the diode effectively unless the following conditions are satisfied.

(e) The entire device is compact and aesthetically pleasing.

(f) Seal the inside of the container containing the diode to prevent moisture.

(Purpose of the invention) The present invention provides an outdoor illumination device for cables that uses a light emitting diode as a light source and can be used effectively by protecting the diode from rainwater and moisture in order to eliminate the drawbacks of the above-mentioned incandescent lamps. It is intended to.

(Structure of the invention) The invention consists of a wiring board in which a plurality of light emitting diodes are arranged at predetermined intervals and wired thereto, a cover tube that has optical transparency and houses the wiring board, and a cover tube that houses the wiring board. It has a cap attached to the end of the cover tube so as to seal it off and guide the wiring to the outside of the cover tube, a window that houses the entire cover tube and allows the light of the light emitting diode to pass through, and an attachment part for the cable. It consists of a cover.

According to such a configuration, the light from the diode is emitted to the outside through the transparent cover tube and the window of the device mounting cover, and an illumination effect can be obtained.

By using a diode as a light source in this manner, the drawbacks of the conventional method can be overcome, and at the same time, the diode is protected from rainwater and moisture by being sealed with a cover tube and a cap, so that the diode can be used effectively. The entire device is also more compact than the conventional structure in which incandescent lamps are attached, and it does not induce much vibration in the cable.

(Example) In FIG. 1, 1 is a wiring board made of an insulating material such as Bakelite or plastic;
Light emitting diodes 2 are arranged on this wiring board 1 at predetermined intervals, and wiring 5 is connected to these light emitting diodes 2.
is being carried out. The spacing between diodes 2 is
It is set according to the luminous intensity of this diode 2.

FIG. 2 is a detailed view of section A in FIG. 1, and as shown in this figure, the light emitting diode 2 has a structure in which the light emitting section 3 is covered with a plastic cover 4.
The wiring 5 is a wiring 5a from the light emitting diode 2.
and wires 5b disposed along the wiring board 1 are connected to each other by a wire 5c, and the surroundings thereof are covered with a covering material 6 made of plastic or the like. Further, this wiring board 1 includes a heat dissipating material 7 that is in contact with the base of the light emitting diode 2. The heat dissipating material 7 is made of a highly thermally conductive material such as aluminum, and is provided on the surface of the wiring board 1 similarly to the wiring 5.

The wiring board 1 to which the light emitting diode 2 and other components are attached as described above is housed in a hollow cylindrical cover tube 8 as shown in FIG. The cover tube 8 is made of a material that is transparent to light and absorbs ultraviolet light, such as fluororesin or quartz glass.
After the wiring board 1 is housed in the cover tube 8, caps 9 and 10 are fitted into both ends of the cover tube 8 to seal the inside. At this time, the wiring 5 and the heat dissipating material 7 pass through the cap 10 on one side, and one end thereof is guided to the outside of the cover tube 8. Note that the cover tube 8 may be open at only one end, and in this case, the inside thereof can be sealed with one cap.

The cover tube 8 that houses the wiring board 1 in this way,
The large-diameter wiring 11 routed along the cable 13 is arranged as shown in FIG. 5, and the large-diameter wiring 11 and the wiring 5 drawn out from the cover tube 8 are connected. Furthermore, from above, a window 12 made of aluminum or the like similar to the heat dissipating material 7 and through which the light from the light emitting diode 2 passes.
A and a cover 12 having an attachment part 12b to the cable 13 are placed on the cover 12, and one end of the heat dissipating material 7 drawn out from the cover tube 8 is joined to the inner wall of the cover 12. If the cover 12 is attached to the cable 13 while covering the cover tube 8 in this way, the cover tube 8 can be attached to the cable 13 while being housed in the cover 12 as shown in FIG.
And the large diameter wiring 11 can be attached to the cable. In this way, when the covers 12 having the light emitting diodes 2 are disposed adjacent to each other along almost the entire length of the cable 13 and the light emitting diodes 2 are made to emit light, the light from the light emitting diodes 2 is transmitted. It communicates with the outside through the cover tube 8 and the window 12a of the cover 12, which have a special feature, and at a distance from the bridge, the light appears to be emitted in a line along the cable, creating an illumination effect. Obtainable.

Next, the effects of using a light emitting diode as a light source will be explained. Since light emitting diodes emit light by plasma discharge and are made of plastic, they have the following advantages compared to, for example, incandescent lamps.

(a) Durability Since incandescent lamps are surrounded by glass, they are vulnerable to external shocks and have the disadvantage of being easily damaged, but diodes are covered with plastic and are therefore less likely to be damaged. In particular, excellent durability is a great advantage for illuminations attached to cables that are prone to vibration.

(b) Shape and mass Incandescent lamps have a structure in which the filament turns red-hot in a vacuum, so they are large in shape and heavy because they are made of glass.However, diodes can be compacted due to plasma discharge, and their weight is small. It's also small.

(c) Effect on cables As mentioned above, diodes are smaller in shape and weight, so compared to incandescent lamps,
Less chance of inducing cable slack, vibration, etc.

(d) Power consumption (efficiency) and lifespan Incandescent lamps are inefficient and consume high power (approximately 1.5W per lamp) because they obtain light using thermal energy from the red-hot filament. On the other hand, light emitting diodes use light from plasma discharge as is, so they are more efficient and consume less power (less than 0.5W per diode).

In addition, in terms of lifespan, light-emitting diodes that use materials such as gallium phosphide (GaP), gallium hissoline (GaAsP), and gallium aluminum hissoline (GaAAs) have a lifespan of about 50,000 yen under normal operating conditions. Compared to the 5,000 hours of incandescent light, this is about 10 times the difference. Therefore, diodes require less maintenance work than incandescent lamps.

In this way, many effects can be obtained by using light emitting diodes as light sources, but
This light emitting diode has the disadvantage of being sensitive to moisture. However, according to the above structure, the inside of the cover tube 8 housing the light emitting diode 2 is sealed by the cap 10, so that moisture can be prevented. Further, even in this closed state, if the wiring board 1 is provided with the heat dissipating material 7 as described above, the heat accumulated by the light emission of the diode 2 can be released to the outside.

The overall shape of the device is also more stable than the conventional structure in which incandescent lamps are hung below the cable, hardly inducing vibration in the cable, and has a better appearance. It's summery.

In the present invention, the cover tube 8 only needs to have light transmittance, and may be, for example, an ordinary glass tube. If the diode 2 is made of a material that absorbs ultraviolet rays, such as quartz glass or the like, it is possible to prevent the plastic cover of the diode 2 from deteriorating due to the ultraviolet rays of sunlight, resulting in a more preferable structure. The same effect is not limited to this, for example, the cover tube body may be made of glass or the like, and the outer or inner surface thereof may be covered with a thin pipe made of ultraviolet absorbing fluororesin film or fluororesin. Obtainable.

(Effects of the invention) As described above, the present invention uses light-emitting diodes as illumination to be attached to the cable, which improves breakability, shape, mass, power consumption, lifespan, etc. compared to conventional configurations using incandescent lamps. can eliminate various drawbacks of Moreover, not only is the diode used as a light source, but the diode is protected from moisture, and the entire device has a compact shape, so vibrations in the cable are less likely to be induced. Furthermore, if the wiring board is equipped with a heat dissipating material to dissipate the heat generated by the light emitted by the diode to the outside, or if the cover tube is made to have ultraviolet absorbing properties to prevent the plastic in the diode from deteriorating, the diode can be made even better. It can be used effectively.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a wiring board on which light emitting diodes are arranged according to an embodiment of the present invention, Fig. 2 is a detailed view of part A in Fig. 1, and Fig. 3 is a perspective view of a wiring board and a cover tube in the same embodiment. Figure 4 is a perspective view of the cover pipe and cover, Figure 5 is a perspective view showing the cover pipe and cover attached to the cable, Figure 6 is a schematic diagram of a conventional cable-stayed bridge, and Figure 4 is a perspective view of the cover pipe and cover. Figure 7 is a perspective view of the illumination device on the bridge. 1... Wiring board, 2... Light emitting diode, 5...
Wiring, 7... Heat dissipation material, 8... Cover tube, 9, 10
...Cap, 12...Cover, 12a...Window,
12b...Mounting part.

Claims (1)

[Claims for Utility Model Registration] 1. A wiring board in which a plurality of light emitting diodes are arranged at predetermined intervals and wired thereto, a cover tube that is optically transparent and houses the wiring board, and the inside of this cover tube. It has a cap attached to the end of the cover tube so as to seal it off and guide the wiring outside the cover tube, a window that houses the entire cover tube and allows the light from the light emitting diode to pass through, and an attachment part for the cable. An outdoor illumination device for cables, characterized by comprising a cover. 2. The outdoor illumination device for a cable according to claim 1, wherein the cover tube housing the wiring board has ultraviolet absorbing properties. 3. The outdoor illumination device for cables according to claim 1, wherein the wiring board is provided with a heat dissipating material in contact with the base of the light emitting diode.