JPH09264013A - Snow deposition preventing device for information display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deposition of snow by attaching a transparent film to the front surface of information display board, forming a gap between an information display board and the film, and vibrating the film with wind. SOLUTION: An information display board main body 1 made of a plurality of LED display units 1a are arranged at a freeway and the like. A lower frame of film attaching frame 2 is fixed to the four sides of display surface of a main body 1, a hood 4 is mounted on an upper part of the frame 2 so as to prevent snow from entering the inside of the frame 2. A transparent film 3 is layed on the front surface of the frame 2 and a gap is formed between the film 3 and a display unit 1a. A cam shaft is provided to vibrate the film 3. In the case of snowfall under no wind condition, although snow is hard to remain on the film 3, the snow stiking onto the film 3, if occurred, is dropped by rotating the cam 5. Although snow is apt to stick thereto easily when wind blows to the display surface, the snow is dropped by the rotation of the cum 5. Accordingly lowering in visibility of the display surface at the time of snowfall can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is designed to display variable road information of a subtitle type in which a large number of light emitting diodes or a plurality of signs are printed, or to display traffic information which is a fixed road sign. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow cover prevention device for an information display plate, the display surface of which is prevented from snowing.

[0002]

2. Description of the Related Art Conventionally, in an information display board installed in a snowy area, an eave is installed above the information display board to prevent snow from adhering to the display surface, or
A heater is installed around each display unit constituting the information display plate to remove snow adhering to the display surface.

By the way, whether or not snow adheres to the display surface is determined under the condition that the snowflakes collide with the display surface at a wind speed of 4 to 5 m or more. Even when the display surface is close to the outside temperature, it is considered that the snowflakes collide with the object to generate thermal energy, and the thermal energy causes the snow to melt at the contact point with the object and adhere and freeze. ing.

[0004]

Therefore, in the information display plate provided with the above-mentioned eaves, the snow is not deposited on the display surface during snowfall in a windless state, but the wind speed is 4 to 5 m. In the above case, there is a problem that snow is generated and the display on the display surface cannot be visually recognized.

Further, in the information display plate in which a heater is installed in each display unit, the above-mentioned snow accretion does not easily occur, but in the case of a large display plate, a considerable amount of electric power is consumed and the electricity required for one season is reduced. There was a problem that the fees would be considerable.

The present invention is intended to solve the above-mentioned problems. The object of the present invention is that the wind speed is 4 to 5 m or more, and the snowflakes collide with an object to cause snowfall.
To prevent snowflakes from colliding with the display plate under this wind speed, a transparent film that vibrates due to the wind is placed on the front surface of the information display plate to provide a snow-prevention device for the information display plate that prevents the occurrence of snow. It is in the field.

[0007]

The device for preventing snow accretion of an information display plate according to the present invention is intended to achieve the above-mentioned object. The means is to mount a transparent film on the front surface of the information display plate and A gap is formed between the display plate and the transparent film so that the transparent film vibrates due to wind.

Further, a transparent film may be attached to the front surface of the information display plate, a space may be formed between the information display plate and the transparent film, and air may pass through the space. desirable.

Further, a transparent film is attached to the front surface of the information display plate, a gap is formed between the information display plate and the transparent film, and a vibration source for forcibly vibrating the transparent film is provided. It may be provided.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a snow accretion prevention device for an information display plate according to the present invention will be described below with reference to the drawings. 1
Is an information display board main body (hereinafter referred to as the main body) in which a total of 90 pieces of LED display units 1a incorporating a 256-dot light emitting diode are installed in a width direction of 15 pieces, a length of 6 pieces, and a total of 90 pieces. Etc. will be installed on the road. A door 1b, which is opened at the time of repair, is attached to the back surface of the main body 1.

Reference numeral 2 denotes four rounds of the display surface of the main body 1 (the LE
An air passage hole 2a is formed above the lower frame and the side frame as a film mounting frame fixed to the outside of the D display unit 1a). A transparent film 3 is stretched on the front surface of the film mounting frame 2. The film mounting frame 2 is formed at a desired height so that a space is created between the transparent film 3 and the LED display unit 1a in this stretched state.

Reference numeral 4 is an eave mounted on the main body 1 above the film mounting frame 2 for preventing snow from entering the film mounting frame 2. Reference numeral 5 denotes a cam shaft rotated by a motor (not shown), and the transparent film 3 vibrates when the cam shaft 5 rotates.

Next, the operation will be described based on the above-mentioned structure. Under the condition that the snow is piled on the upper surface of the eaves 4 and it is difficult for the snow to land on the transparent film 3 in a windless state, Even when the snow is landed on No. 3, since the cam shaft 5 is rotated by the motor, the transparent film 3 is vibrated as shown in FIG. The display of the main body 1 does not become difficult to see.

Further, in this state, an air flow as shown by a dotted line in FIG. 1 is generated by the air passage holes 2a formed above the lower frame and the side frame of the film mounting frame 2, so that the display surface of the main body 1 is displayed. The heat generated from the air is exhausted, the display surface is not heated because the transparent film 3 is attached, and the transparent film 3 is kept at the same temperature as the outside temperature. It is prevented from melting and adhering.

On the other hand, when a wind of 4 to 5 m or more blows toward the display surface, the transparent film 3 vibrates due to the wind and the cam shaft 5 causes the snow, although it is a condition that the transparent film 3 easily snows. Also, since the vibration is applied, the transparent film 3 does not collide and the temperature of the transparent film 3 is close to the outside air temperature. Therefore, the snow that has contacted the transparent film 3 does not melt and shakes. Therefore, the display of the main body 1 does not become difficult to see.

In the above-mentioned embodiment, the case where vibration is forcibly applied to the transparent film 3 has been described.
This forced vibration is not always necessary. Further, even when the forced vibration is applied, it is not limited to the cam shaft 5, and can be performed by a known vibration means.

Also, the film mounting frame 2 of the transparent film 3
As a method of attaching the transparent film 3 to the attachment frame 2, it can be fixed by a magnetic force by a magnet, or the transparent film 3 may be wound around a roll, and the main body 1 may be attached as necessary.
Various modifications are conceivable, such as automatically covering the surface of the. Further, the method of introducing the outside air into the gap is not limited to the lower part of the mounting frame.

[0018]

As described above, according to the present invention, the transparent film is attached to the front surface of the information display plate, and a gap is formed between the information display plate and the transparent film so that the transparent film vibrates due to wind. With this configuration, even if the transparent film vibrates due to wind and snow comes into contact with the transparent film, the transparent film is not shaken off and does not land on the snow. Therefore, the display is not difficult to see.

Further, by mounting a transparent film on the front surface of the information display plate, forming a space between the information display plate and the transparent film, and by allowing air to pass through the space. The transparent film is kept at the same temperature as the outside air temperature, and therefore, even if snow comes in contact with the transparent film, it does not melt and adhere and is shaken off well, and the transparent film does not become cloudy and the display becomes difficult to see.

Furthermore, a transparent film is attached to the front surface of the information display plate, a gap is formed between the information display plate and the transparent film, and the transparent film is forcibly vibrated, whereby a windless state is obtained. Even in the case, since the transparent film is vibrating, the snow is shaken off and the visibility of the display is not impaired.

[Brief description of drawings]

FIG. 1 is a front view showing a snow accretion prevention device for an information display plate according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a perspective view showing an example of a mechanism for forcibly vibrating a transparent film.

[Explanation of symbols]

 1 Information display board body 2 Film mounting frame 3 Transparent film 4 Eaves 5 Cam shaft

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor ▲ Shark ▼ Shima Toshi ▲ Takashi ▼ 4-7-17 Ichibancho, Aoba-ku, Sendai-shi, Miyagi Sendai Road Engineer Co., Ltd. (72) Inventor Michio Torikai Kanagawa 100, Maeda-cho, Totsuka-ku, Yokohama City Koito Industry Co., Ltd. (72) Inventor Yasuhiro Tomita 36, Terada Shinjo, Joyo-shi, Kyoto Seiwa Electric Co., Ltd. (72) Inventor Masahiro Hattori 1 Yokohori-cho, Nakagawa-ku, Nagoya 36-chome Nakoya Electric Industry Co., Ltd.

Claims (3)

[Claims] 1. A transparent film is attached to the front surface of the information display plate, a gap is formed between the information display plate and the transparent film, and the transparent film is vibrated by wind. Snow prevention device for information display board. 2. A transparent film is attached to the front surface of the information display plate, a gap is formed between the information display plate and the transparent film, and air is passed through the gap. Characteristic information display board snow prevention device. 3. A vibration source for mounting a transparent film on the front surface of the information display plate, forming a gap between the information display plate and the transparent film, and forcibly vibrating the transparent film. A snow accretion prevention device for an information display plate, which is provided.