JP3875903B2 - Backlighting sign board - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a sign board devised so that it can be seen well even with reverse light rays, and in particular, in road signs, when the morning and evening sun rays are reverse light rays with respect to the sign board, the characters or figures on the display surface are more clearly visible The present invention relates to an improvement of the signboard that has been improved as possible. In this specification, a symbol, figure, symbol, number, or a pattern composed of a combination thereof drawn on a sign board is representatively expressed as “character or figure”.
[0002]
[Prior art]
For example, in the case of road signs, when the morning or evening reverse rays hit the road signs, the driving driver will be able to interpret the characters or figures because the sign board on the back will be darkened by the intense direct sun rays received from the front in the direction of travel. It becomes difficult. For example, Japanese Patent Application Laid-Open No. 9-242027 discloses an invention that makes it possible to quickly and accurately confirm a road sign even under such a reverse ray.
[0003]
This known road sign will be described with reference to FIG.
The sign plate 21 is composed of a front plate 22 made of, for example, an aluminum plate and a back plate 23 made of a white synthetic resin fixed on the back surface of which the paint or the like has been wetted in accordance with a law such as blue. 23 is made of a material that transmits light well.
Reference numeral 24 shown in the figure is a character punching opening in which characters written on the surface of the surface plate 22 are punched and removed by a press machine or the like according to the shape and size thereof. Similarly, reference numeral 25 indicates a figure to be displayed. The figure punching opening punched out according to the shape is shown.
[0004]
In such a road sign, during the so-called back light in which the sunlight hits from the back side of the sign board 21 in the figure, the light passes through the white synthetic resin plate which is the back face board 23, and the character punching opening 24 and the figure punching opening. It will pass the 25 part and will reach the front side of the sign board 21. Therefore, for example, when the road sign is backlit, the driver can visually recognize the display contents accurately by the passing light from the punching opening for the character or the figure.
[0005]
However, in the road signs as described above, when the light hits from the sign board surface side at night, the reflected light from the character or graphic surface is very small and difficult to see. That is, when the light of the headlight is irradiated on the surface of the sign board 21, the light beam passes through the opening 24 and the opening 25 of the character and the figure, and the reflection on the surface of these parts is performed. There are almost no rays. In addition, since the darkness in the night when the resin plate is the background is picked up, the character or figure portion becomes black and the visibility is lowered.
[0006]
7 to 9 show other conventional examples.
FIG. 7 shows a visually recognized state of the characters 34 and the graphic 35 displayed on the surface of the sign board 31 of such a known example. The sign plate 31 is composed of a front surface plate 32 and a back surface plate 33 as in the known example of FIG. 6, and the corresponding portion of the front surface plate 32 corresponding to the portion of the graphic 35 or the character 34 is still entirely. It is formed as an opening 37 (see FIGS. 8 and 9) by punching or the like.
[0007]
FIGS. 8 and 9 show the structure of the front plate 32 and the back plate 33 constituting such a sign plate 31, the case where sunlight hits the sign plate 31 as backlight, and the sign plate 31 such as a car headlight. The visible light rays in the portion of the character 34 or the graphic 35 in the case where the light rays hit as forward light are described.
First, the structure of the sign plate 31 includes a surface plate 32 having a green or other reflective sheet on the surface, and a back plate 33 having a light-transmitting property by attaching a white reflective sheet to the surface and providing a large number of openings 38. It is composed by overlapping. 7 is formed in the necessary portion of the surface plate 32, and the characters 34 and the graphic 35 in FIG.
[0008]
FIG. 8 shows the case where the sunlight indicated by the arrow A hits the sign plate 31 with backlight, and among the light rays that have passed through a large number of openings 38, 38 formed in the back plate 33, characters or Since only the light beam indicated by the arrow B passing through the opening portion 37 for the figure can be visually recognized from the front side of the sign plate 31, the opening 37 portion corresponding to the character or the figure on the sign plate 31 even in the backlit state. Visible.
[0009]
FIG. 9 shows a case where the light from the illumination device or the headlight 39 is irradiated to the front side of the sign plate 31 as indicated by the arrow A. The light beam reflected from the surface reflection sheet attached to the front surface plate 32 is retroreflected as green reflected light in the same manner as a normal sign plate, and is attached to the back surface plate 33 through the opening 37 of characters or figures. The light reflected by the reflection sheet is visually recognized as white retroreflected light as indicated by the arrow B, and the display content can be clearly visually recognized even at night, for example.
[0010]
However, in such a configuration, since the sign plate 31 is formed by superposing the front plate 32 and the back plate 33, not only the structure becomes complicated, but also the weight of the sign plate itself increases. Thus, the entire road sign is large and economically expensive. In particular, the back plate 33 is usually provided with an opening 38 that is a punch hole over the entire surface thereof, and further, for example, a white reflective sheet is applied over the entire surface, so that there are many wasteful portions as a whole. , It has the disadvantage of becoming more expensive.
Further, when the number of the openings 38 is increased, the amount of transmitted light increases when the sun is located directly behind the sign plate 31 and it becomes difficult to visually recognize due to glare. On the other hand, when the number of the openings 38 is decreased, the sign at the time of normal quasi-backlight. There is also a drawback that the surface and the surface of the character or graphic part become dark.
[0011]
[Problems to be solved by the invention]
The present invention eliminates the above-mentioned drawbacks, has a simpler structure, and has good visibility both in front light (normal time), back light, and night time. An extremely clear sign board is provided.
It is another object of the present invention to provide a sign board that can be made simple and light in its overall structure, and that can produce the entire road sign at low cost.
[0012]
[Means for Solving the Problems]
The present invention is a sign board for road signs in which characters or figures are drawn on the surface of the board, and a reflective sheet such as green is pasted on the background part of the board surface, and white on the letters or figures part Reflective sheets are affixed, and a large number of slits are formed in the strokes constituting the characters or figures through the discontinuous parts, and the letters or figures are displayed by these slits. It is a sign board with a countermeasure against backlighting.
In addition, the slit is straight and the width is one-fourth to one-fifth of the width of the stroke part, and the board is an aluminum plate and has a character or a figure on the back side. It is a sign board provided with reinforcing ribs other than the corresponding portions.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a front view showing the entire structure of a sign board 11 according to the present invention, and externally, characters or figures are displayed on the surface of the board 12 of the sign board 11 in the same manner as a normal road sign. . The general character or graphic portions 41 and 42 are white according to the law, and the background portion 40 is green or blue. In addition, important display information such as place names, exit indications, exit direction arrows and other characters or graphic portions 41 and 42 are each provided with a number of slits as described in detail below. Or a figure is adopted. In addition, about structures other than the character or figure of the sign board 11 containing the board 12, it demonstrates later with FIGS.
[0014]
FIG. 2 is a diagram for explaining the structure of the character or graphic portions 41 and 42, which is the most characteristic configuration of the present invention, and illustratively shows the structure of the character 41 as an example.
As a specific example, the character 41 constituting the character “Fuku” is a background 40 (surface of the board 12 colored in green, for example, in FIG. 1). The character surface 43 drawn in white and a large number of slits 44, 44 formed in the board 12 itself in the character surface 43.
[0015]
The character face 43 is formed of a conventionally known reflection sheet similarly to the background 40 portion, and is, for example, white as described above. In addition, the size of the stroke or the like constituting the character face 43 of the character or figure is arbitrary, but the slit 44 formed in the stroke portion has a width h of, for example, 4 minutes with respect to the width H of the stroke. It is preferable to set it to about 1/5 of these.
[0016]
A portion indicated by reference numeral 45 in FIG. 2 indicates a so-called discontinuous portion of the slit 44 that isolates the slits 44 formed in various stroke portions of the character face 43. This is because, for example, the slits 44 formed in the strokes of the characters constituting the character plane 43 or the portions where these are continuous (for example, portions such as the mouth, the rice field, etc.) are continuous in order to express the characters more beautifully. Although it is good to do, it is for preventing the part surrounded by the said stroke from dropping out by providing the discontinuous part 45 between each slit 44 and 44 in this way.
[0017]
Accordingly, for example, even if the slits 44 and 44 in the “indication” portion are continuous, no particular problem occurs. However, the “mouth” portion and the “field” portion are between the slits 44 and 44 as shown in the figure. The discontinuous portion 45 is always provided. Needless to say, the width dimension of the discontinuous portion 45 may be a dimension that has sufficient strength to prevent the discontinuous portion 45 from dropping off the portion surrounded by the slit. It is set as the dimension space | interval which can fully support the wind pressure load of about 50 m / s of wind speed which a board receives.
[0018]
In this way, a large number of slits 44 are arranged through the discontinuous portions 45 in each stroke or the like of the character surface 43 of the character 41, which is a component of each of the character or graphic portions 41, 42. The corresponding character or figure can be displayed only by the slit 44.
Therefore, when the sign board 11 is located in the backlit state, the light beam that has passed through the slit formed in the character shape formed by the multiple slits 44, 44 in the character surface 43 (the same as the graphic surface), In combination with the surrounding background color, clear characters can be visually recognized.
Further, since a portion of the character surface 43 (the same as the graphic surface) other than the slit 44 is provided with a normal white reflection sheet, the conventional case (without backlighting countermeasures) is used in the case of the following light. Characters or graphics can be visually recognized with sharpness, and at night, by retroreflected light.
[0019]
As for the formation of the slits 44, the round holes or the long round holes are formed on the aluminum board 12 by overlapping the semi-circles and embossed, and the slits 44, 44 are continuously formed by a high-pressure jet flow using a water jet machine or the like. It can also be manufactured by cutting. It is desirable that the shape of each character stroke (same for graphics) and the shape of the character or figure formed by the slits be the same as possible. Therefore, the straight line portion of the stroke in the character is a straight line parallel to it. It is desirable that the slit 44 is formed in the curved portion with a linear slit that approximates the curved shape as much as possible.
[0020]
3 and 4 show the back and side surfaces of the board 12 that forms the sign plate 11 shown in FIG.
As is clear from FIG. 3, the board 12 is generally made of one or more aluminum plates, and in the illustrated embodiment, the upper board 12 is 3500 × 1700 mm and the lower board 12 is It is formed in 3500x900mm. In addition, a plurality of reinforcing ribs 13 are fixed to the back surface of the board 12, and in this embodiment, the ribs are installed at intervals of 200 to 225 mm.
[0021]
A portion surrounded by a broken line indicated by reference numeral 14 in FIG. 3 is usually a portion where the reinforcing rib 13 is provided when the board 12 is manufactured, and shows a rib removing portion from which the rib 13 is removed. 1 are arranged on the board 12 corresponding to the rib removing portion 14. This is because a large number of slits 44, 44 such as letters arranged in the rib removing portion 14 are not allowed to pass light rays in the backlight when the sun rays are irradiated from the back side of the sign board 11 made of the board 12. This is because 12 does not interfere.
Therefore, since many slits 44 and 44 part are visually recognized from the surface side like the band of light as it is, the character or figure displayed by these slits will become very clear.
[0022]
4 is a side view of the board corresponding to the upper portion of the boards 12 and 12 shown in FIG. Since the rigidity of the board 12 is increased by fixing the large number of reinforcing ribs 13 in this way, the light and high-strength sign plate 11 can be configured using a thin aluminum plate or the like.
[0023]
FIG. 5 is a cross-sectional view of the reinforcing rib 13 shown in FIG. 4 and is configured as a long body by extrusion molding of aluminum.
As an example, such a polymorphic dimension of the rib 13 can be prepared by setting the width of the fixing portion 13A to the board 12 which is the bottom portion to about 50 mm and the height to 55 mm. However, the cross-sectional shape of the rib 13 is arbitrary and is not the gist of the present invention.
[0024]
【The invention's effect】
Since the sign board according to the present invention is simply a combination of characters or figures drawn on the board and slits, the structure is extremely simple, and a light and inexpensive road sign can be obtained.
In addition, by forming slits that are approximated as linearly as possible such as strokes in the portions of characters or figures (designs made of letters, figures, symbols, numbers, or combinations thereof) drawn on the sign board surface, Alternatively, the legibility of figures and the like when backlit can be improved.
And by setting the width of the slit to about one fourth to one fifth of the width of a stroke or the like, excessive passing light at the time of backlighting can be restricted, and letters or The visibility of the figure was very good.
In addition, a reflective sheet is attached to the character or figure strokes, etc., so that reflection at the time of light irradiation of the headlight is good even at night. There is an effect that the degree is hardly lowered.
[Brief description of the drawings]
FIG. 1 is a front view of a sign plate according to the present invention.
FIG. 2 is a schematic diagram for explaining the structure of a character or graphic portion according to an embodiment;
3 is a rear view of the sign board shown in FIG. 1. FIG.
FIG. 4 is a side view of the board.
FIG. 5 is a cross-sectional view of a rib.
FIG. 6 is a perspective view of one conventionally known marker plate.
FIG. 7 is a front view of another conventional sign plate.
FIG. 8 is an explanatory diagram of the state of light rays when the sign plate shown in FIG. 7 is backlit.
FIG. 9 is an explanatory diagram of the state of light rays when the sign plate shown in FIG.
[Explanation of symbols]
11 sign board 12 board 13 rib 14 rib removal part 40 background part 41 character part 42 figure part 43 character face 44 slit

Claims (4)

A sign board for road signs with characters or figures drawn on the surface of the board. A green reflective sheet is pasted on the background of the board surface, and a white reflective sheet is placed on the characters or figures. A number of slits are formed in the stroke parts constituting the characters or figures, with discontinuous parts, and the letters or figures are displayed by these slits. A sign board with backlighting measures. 2. The sign board according to claim 1, wherein the width of the slit is one fourth to one fifth of the width of the stroke portion. 3. The sign board according to claim 1, wherein all the slits are linear. The sign board according to any one of claims 1 to 3, wherein the board is an aluminum plate, and reinforcing ribs are provided at portions other than portions corresponding to characters or figures on the back side.

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