JP3243091B2 - Information display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LE for hanging on a platform of a station, for example, and displaying a destination and departure time.
The present invention relates to a guidance display device provided with a display such as a light emitting diode (D).

[0002]

2. Description of the Related Art Conventionally, as an example of this kind of guidance display device, there is one configured as shown in FIGS. 6 to 9, FIG. 6 is a perspective view of the guidance display device, and FIG. FIG. 8 is a perspective view of the guidance display box shown by a circle from below, and FIG.
FIG. 9 is an enlarged sectional view taken along the line A and viewed in the direction of the arrow, and FIG. 9 is an enlarged sectional view taken along the line BB of FIG. 6 and viewed in the direction of the arrow.

The ceiling plate 1a of the box 1 has a pair of opening holes 5
1 are formed, and an exhaust fan 36 is attached to the lower surface of the opening 51. Also, the opening hole 51
The ventilator 52 is attached to the upper surface of each. Similarly, a slit-like long hole 50 is formed in the bottom plate 1 b of the box body 1, and a suction sheet 54 having a rectangular outline is attached to the inside of the long hole 50, and a rectangular shape is inserted through the suction sheet 54. The air filter 53 is detachably attached.

Further, as shown in FIG. 8, a frame 1c formed in an L-shaped cross section by connecting a ceiling plate 1a and a bottom plate 1b is provided at the center of the box 1, and the frame 1c has a cross section. Is a U-shaped bracket 1d
Are connected to the frame 1c at right angles, and a power supply unit 30 is attached to the front side of the bracket 1d by pulling a stopper. A wiring breaker (not shown) and an interface (not shown) incorporated in the printed circuit board are also provided. Installed.

[0005] In the conventional guide display device thus configured, the inside of the box 1 is heated by the heat of the light emitting diodes integrated in the LED module 20 as the power supply unit 30 and the printed circuit board for the interface. I do. For this reason, the structural member is made of an aluminum material having a high thermal conductivity, and is cooled by dissipating heat from a portion exposed to the outside air.

However, since the cooling effect of the limited external shape and size cannot guarantee the operating temperature range of the internal electric equipment, the cooling is often forcedly performed by the exhaust fan 36 or the like. Therefore, most of them are the exhaust fan 3 on the upper surface of the box 1.
The air is exhausted upward at 6, and the electric equipment inside is cooled by the cooling air sucked from the air filter 53 attached to the bottom plate 1b with the exhaust. Then, after the guide display device is installed at a desired position, dust entering from the air filter 53 adheres to the back surface of the screen 2 and the internal electric equipment, and the sharpness of the display characters and the like by the LED module 20 is impaired. Periodically, the screen 2 is cleaned, and the maintenance and inspection are performed in order to prevent the insulation of the internal electric devices from being lowered.

By the way, in transportation, the above-mentioned cleaning work of the screen 2 is performed at a high place at midnight after the end of the last train, and maintenance and inspection is also performed at a high place at midnight.

[0008]

However, in the conventional guide display device described above, the display contents of the LED module 20 of the box 1 are diversified and increased with the diversification of information services. Electrical equipment has also increased. As a result, the amount of heat in the internal electrical equipment has increased,
The electric equipment is cooled by increasing the number of exhaust fans 36.

Then, the amount of cooling air sucked from the air filter 53 attached to the bottom plate 1b increases due to the exhaust.

[0010] Therefore, the cleaning work of the screen 2 and the maintenance and inspection cycle of the internal electric equipment are shortened. For this reason, the operation cost increases.

Furthermore, if the exhaust fan 36 breaks down or stops, the forced cooling stops and the temperature inside the box 1 rises. Therefore, a failure detection circuit for the exhaust fan 36 is provided to protect the built-in articles from heat. However, there is a problem in terms of dust-proofing while the exhaust fan 36 is stopped, because the failure detection circuit and supplies are required.

In view of the above, the present invention has been made to solve the above-mentioned problems, and there is no need to provide an exhaust fan for taking in outside air into the inside of the box. An object of the present invention is to provide a guidance display device that can eliminate maintenance and inspection.

[0013]

In order to achieve the above object, an invention corresponding to claim 1 is a sealed box having a plurality of air flow holes formed in a bottom plate and a ceiling plate at opposing positions, respectively. A plurality of communication holes are formed so as to be stored in the box body and communicate with the plurality of air circulation holes formed in the bottom plate and the plurality of air circulation holes formed in the ceiling plate. wherein the communication hole outside air through the respective air holes are inflow and outflow by natural convection, the pre-Symbol box body This ensures that cooling and consists of a material having good thermal conductivity to reinforce the box body cooling means A display body disposed in the box body, formed so that a display surface of a part of the box body can be visually recognized from the outside, and cooled by a cooling action of the cooling unit; It is stored in the box, and is cooled by the cooling action of the cooling means. A drive control circuit for driving and controlling the display device main body, a guide display device provided with.

In order to achieve the above object, the invention according to claim 2 is configured as follows. That is, the guidance display device according to claim 1, wherein the cooling means is provided with a means for increasing its surface area.

In order to achieve the above object, the invention corresponding to claim 3 is configured as follows. That is, the cooling means is connected to the display main body and the drive control circuit, and a heat transfer means for directly transmitting heat from the display main body to the cooling means is provided. The guidance display device according to claim 1.

[0016]

[0017]

According to the invention corresponding to the first to third aspects, the heat-up heat inside the box is cooled by the cooling means which sucks in and discharges the outside air by natural convection into the air passage, so that the outside air is cooled by the box. There is no need to provide an exhaust fan for taking in the inside, the inside can be cooled, and cleaning work and maintenance and inspection due to adhesion of dust can be eliminated.

According to the third aspect of the present invention, in addition to the function of the first aspect, the heat of the drive control circuit is transmitted to the cooling means, so that the cooling efficiency is improved and the overall size can be reduced. it can.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Here, the conventional example described above (FIGS. 6 to 9) will be described.
The same parts as those described above are denoted by the same reference numerals and description thereof will be omitted.

FIG. 1 is a perspective view showing a schematic structure of an embodiment of the guide display device of the present invention, FIG. 2 is a perspective view of the box of FIG. 1 viewed from below, and FIG. FIG. 4 is an enlarged sectional view taken along the line AA and viewed in the direction of the arrow, FIG. 4 is an enlarged sectional view taken along the line BB of FIG. 1 and viewed in the direction of the arrow, and FIG. FIG. 2 is a perspective view taken along the line CC of FIG.

Two opening holes 34 are formed in the ceiling plate 1a of the box 1 having the same outer shape as the conventional box 1, and each opening 3
4 and two air flow passages are formed in the bottom plate 1b of the box 1 and each of the bottom plates 1b has a plurality of elongated holes 33. Two sets of natural convection cooling, which are made of, for example, aluminum and have a plurality of communication holes (lattice-shaped holes) 37a formed therein so as to communicate the opening holes 34 and the respective long holes 33, and reinforce the box body 1. Means 37 are arranged in the same direction. A ventilator 35 having a U-shaped cross section is provided around the periphery of each opening of the ceiling plate 1a so that air can flow therethrough and the radiation heat of sunlight can be cut off.
Are disposed on the ceiling plate 1a.

In the guide display device thus constructed, if the temperature of the air inside the box rises due to the heat generated by the power supply unit 30 or the printed circuit board for the interface and the light emitting diode integrated in the LED module 20, the box body will The cooling means 37 provided in the cooling unit 37 is also heated in the same manner. However, the inside of the communication hole (lattice-shaped hole) 37a of the cooling means 37 passes through the outside air and is in contact with the outside air. If there is a temperature difference, the outside air effectively rises in the communication hole 37a due to the chimney action, and the temperature-raised air inside the box 1 is naturally discharged as heat, so that the inside of the box 1 can be cooled.

Therefore, the conventional ceiling plate 1 shown in FIGS.
a, an opening hole 51 is formed in the lower surface of the exhaust fan 36.
Are attached to the bottom plate 1b, and slit-like long holes 50 are arranged and formed. An air filter 53 is attached to the inner surface of the long holes 50 via an adsorption sheet 54,
A method of exhausting the temperature-raised air inside the box 1 with the exhaust fan 36 and sucking the outside air from the air filter 53 to cool it is unnecessary, so that a small amount of dust in the outside air enters the inside of the box 1. I won't. Since dust does not adhere to the air filter 53 and the internal electric equipment, cleaning work of the air filter 53 due to intrusion of dust and maintenance / inspection of the electric equipment become unnecessary.

Further, in an environment where the sun hits the upper surface of the guidance display device, the ventilator 35 cuts off the sunlight and does not transmit the radiant heat of the sunlight to the cooling means 37. Since the temperature can be maintained, the inside of the box 1 is effectively cooled.

On the other hand, in FIGS. 3 and 5, the power supply unit 30 of the internal electric equipment is attached to the front side of the aluminum material bracket 32a with the stopper 31. The ends of the bracket 32a are joined to the outer surface of the cooling means 37, respectively. Also, a circuit breaker (not shown) and an interface (not shown) incorporated in the printed circuit board are attached to other brackets 32b and 32c. One end of each of the brackets 32b and 32c is
Since the structure is joined to the outer surface of the cooling means 37,
The surface area of the cooling means 37 in the box 1 is expanded.

[0026] If it is such a configuration, air that has a temperature rise of the box body 1, blanking racket Tsu preparative 32a, 32 b, 32c, 3
More efficient cooling is obtained by accelerating the circulation from 2d to the cooling means 37 to exhaust heat.

Further, since the cooling means 37 is formed in a lattice shape in cross section, it has excellent rigidity and can also be used as a main member of the box 1, so that it is shown in FIG. The frame 1c and the like become unnecessary. And
Since the cooling means 37 is a frame for mounting the built-in article in place of the conventional frame 1c, the provision of the cooling means 37 does not increase the space.
That is, the space factor is the same as that of the conventional forced cooling structure in which the exhaust fan 36 provided on the upper surface of the box 1 sucks air from the lower hole and exhausts air from the upper surface.

In the guide display device of the above-described embodiment, since the inside of the box 1 is not cooled by the exhaust fan 36, the cooling is stopped due to a failure of the exhaust fan 36 or the like, and the box 1 is cooled. A failure detection circuit for protecting the built-in article from a rise in temperature inside the apparatus and the article can be dispensed with, and an inexpensive guidance display device can be obtained in terms of cost.

Openings 34 are provided in the ceiling plate 1a of the box 1, and elongated holes 33 are similarly arranged in the bottom plate of the box, and both ends of the cooling means 37 are provided on the inner surfaces of the open holes 34 and the elongated holes 33. The surfaces are joined to each other, the ceiling plate 1a and the bottom plate 1b of the box 1 are connected, and the opening 34 and the elongated hole 33 are penetrated through the cooling unit 37 to form a box. However, the rigidity of the box 1 as a main member of the box 1 is increased, and almost no other frames are required, so that the guide display device can improve the manufacturing convenience.

[0030] In addition, blanking La mounting the power supply unit 30
Ke Tsu DOO 32b, a 32c, by attaching the outer peripheral surface of the cooling means 37, by expanding the outer peripheral surface of the cooling means 37,
This is a guidance display device capable of absorbing radiation due to heated air inside the communication hole 37a and promoting heat dissipation inside the box.

The present invention is not limited to the above-described embodiment, but may be modified as follows, for example. The ventilator 35 of the above-described embodiment may have any configuration as long as it can promote natural convection. In addition, the configuration of the display main body is not limited to the LED module, and may be anything. Since the cooling means 37 is made of aluminum, the cooling means 37 is resistant to salt damage and the like, has an effect of better heat conduction than iron, and can be reduced in size. However, the cooling means 37 is not limited to this depending on the application.

[0032]

According to the present invention, there is no need to provide an exhaust fan for taking in outside air into the inside of the box, the inside can be cooled, and a guide display which can eliminate cleaning work and maintenance and inspection due to adhesion of dust and dirt. An apparatus can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration of an embodiment of a guidance display device according to the present invention.

FIG. 2 is a perspective view of the guidance display device of FIG. 1 as viewed from below.

FIG. 3 is an enlarged sectional view taken along the line AA of FIG. 1 and viewed in the direction of the arrow;

FIG. 4 is an enlarged sectional view taken along the line BB of FIG. 1 and viewed in the direction of the arrow.

FIG. 5 is a perspective view taken along the line CC of FIG. 1 and viewed in the direction of the arrow;

FIG. 6 is a perspective view showing a schematic configuration of an example of a conventional guidance display device.

FIG. 7 is a perspective view of the guidance display device of FIG. 6 as viewed from below.

FIG. 8 is an enlarged cross-sectional view taken along the line AA of FIG. 6 and viewed in the direction of the arrow.

FIG. 9 is an enlarged cross-sectional view taken along the line BB of FIG. 6 and viewed in the direction of the arrow;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Box, 1a ... Ceiling board, 1b ... Bottom board, 1c ... Frame, 1d ... Bracket, 1e ... Front edge, 2 ... Screen,
3a: Front cover, 3b: Back cover, 4: Holder,
5 small hole, 5a rubber plate, 10 packing, 11 hinge, 12 bolt, 13 hook, 14 latch, 14a
... Lever, 15 ... Mounting base, 20 ... LED module, 2
DESCRIPTION OF SYMBOLS 1 ... Stopper, 22 ... Panel, 32a ... Bracket, 32
b, 32c: bracket, 33: long hole, 34: opening hole,
35: ventilator, 37: cooling means, 37a: communication hole.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Togawa 5-6-3 Higashi-Ueno, Taito-ku, Tokyo Inside the Teito Metropolitan Expressway Transit Authority Electric Office (72) Inventor, Ko Igarashi 5-chome, Higashi-Ueno, Taito-ku, Tokyo No. 6-3 Inside the Tokyo Metropolitan Expressway Highway Transportation Corporation Electric Office (56) References JP-A-63-13584 (JP, A) JP-A 4-13982 (JP, U) JP-A 1-128377 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G09F 9/00 304 B61L 25/02

Claims (3)

(57) [Claims] 1. A closed box having a plurality of air circulation holes formed in a bottom plate and a ceiling plate provided at opposing positions, respectively, and a plurality of air circulation holes housed in the box and formed in the bottom plate. A plurality of communication holes are formed so as to communicate with a plurality of air circulation holes formed in the ceiling plate, and outside air flows into and out of the communication holes by natural convection through the air circulation holes, This I Ri is cooled before Symbol box body to and cooling means consisting of a material having good thermal conductivity to reinforce the box body, is disposed in the box body, a display surface having a portion of the box body Is formed so as to be visible from the outside and is cooled by the cooling action of the cooling means; and the display body is housed in the box body and is cooled by the cooling action of the cooling means to drive the display body. And a driving control circuit. 2. The guidance display device according to claim 1, wherein said cooling means is provided with means for enlarging its surface area. 3. The cooling means is connected to the display main body and a drive control circuit, and a heat transfer means for directly transmitting heat from the display main body to the cooling means is provided. The guidance display device according to claim 1, wherein: