JPH0579587U - Lighting equipment - Google Patents

Abstract

(57) [Summary] (Modified) [Objective] The present invention is to provide a lighting device for an advertising sign, which eliminates the lamp image and saves power. [Structure] A large number of straight tube fluorescent lamps B are arranged in parallel at intervals, and a transparent sheet for advertisement display a is provided in front of the lamp row.
In the lighting device configured by forming the above, the reflector C is provided on the rear side of each lamp B. The reflector C reflects the light emitted to the back of the lamp obliquely to the left and right, and the first reflection that projects toward the left and right of the lamp in a V-shape so as to illuminate the central zone between the lamps of the translucent sheet. A wide band including a central band between lamps and a band directly below the lamp of the translucent sheet, which is connected to both ends of the plate c ₁ and the V-shaped first reflecting plate and reflects the light emitted obliquely rearward of the lamp. And a second reflector c ₂ for irradiating the second reflector with the tip of the second reflector, and reflects the lateral irradiation light of the adjacent lamp, so that the band extending from the central zone between the lamps of the translucent sheet to the zone directly below the lamp is It is composed of a third reflecting plate c _{3 for} irradiation.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lighting device, and mainly relates to improvement of a lighting device suitable for a large advertising billboard.

[0002]

[Prior Art]

 Conventionally, as a lighting device for an advertising sign, a large number of straight tube fluorescent lamps (50 to 60) are arranged in parallel at intervals, and a transparent member for advertising display (a synthetic resin molded plate or A large illuminating device is used that has a synthetic resin sheet with woven fabric. In particular, in the design of the illumination device for the above-mentioned large advertising signboard, the following points are problems regarding the lamp interval and the distance between the lamp and the display translucent member which is the irradiation surface.

(1) When the lamp is brought closer to the translucent member which is the irradiation surface in order to increase the illuminance (brightness), a lamp image (difference in brightness) is generated. It maintains a good brightness. In this case, the number of lamps increases. (2) When the lamp is moved away from the illuminated surface, the bright and dark lines disappear, but the illuminance decreases. In this case, the lamp interval can be widened. (3) However, in advertising billboards, the brightness of the translucent member for display is prioritized, so that the number of lamps is increased. In this case, the lamp image disappears, but a significant increase in power consumption is unavoidable.

In consideration of the above-mentioned problems, in the conventional illumination device for a large advertising billboard, the distance between the fluorescent lamp and the translucent member is set to about 30 cm, and the lamp interval is also set to about 30 cm in many cases. . However, even with the above configuration, the lamp image is not completely eliminated.

[0005]

As one means for solving the above problems, there is the use of a reflector. However, although it is easy to increase the illuminance by using a reflector, at the same time, it creates a contradictory state in which a strong lamp image is generated, and therefore there is still a problem in its use.

[0006]

[The purpose of the device]

 The present invention is a lighting for a large advertising signboard that can utilize the characteristics of the reflector plate as it is, without giving a ramp image to the translucent member for advertisement display, to obtain uniform brightness and to drastically reduce power consumption. The main purpose is to provide a device.

[0007]

[Means for Solving the Problems]

 In the first invention of the present application, a large number of straight tube discharge lamps are arranged in parallel at intervals, a transparent member for advertisement display is arranged in front of the lamp row, and a reflector is provided on the rear side of each lamp. In the illuminating device configured as described above, the reflector reflects the light emitted to the back of the lamp diagonally to the left and right, and directs it to the left and right rear of the lamp so as to illuminate the central zone between the lamps of the translucent member. And the first reflector that projects in a V-shape, and the V-shaped first reflector that is continuous with both ends of the first reflector, reflects the light that is emitted obliquely rearward of the lamp and reflects the central band between the lamps of the translucent member. It is intended to be composed mainly of a second reflecting plate that illuminates a wide band. The second invention of the present application is connected to the tip of the second reflecting plate in the first invention, and reflects the lateral irradiation light of the adjacent lamp, thereby forming a band including a central band between the lamps of the translucent member and a band directly below the lamp. The gist is to have a third reflector for irradiation. The third invention of the present application is connected to the tip of the second reflecting plate in the first invention, reflects the light emitted obliquely rearward of the lamp, and irradiates a wide band including the central band between the lamps of the translucent member. The gist of the present invention is to have a third reflection plate that does.

[0008]

[Action]

 In the lighting device having the above structure, the first reflecting plate, the second reflecting plate, and the third reflecting plate jointly illuminate the central zone between the lamps of the translucent member for advertisement display having the lowest illuminance. The illuminance difference between the area directly below the lamp and the central area between the lamps is averaged, and a transparent member without a lamp image is obtained.

[0009]

【Example】

 1 to 7 show an embodiment of the present invention. In the figure, A is an illumination box body of a horizontally long advertising signboard, a transparent cloth a for advertisement display made of PVC with woven cloth is provided on the front surface of the box body, and a large number of straight tubes are provided in the box body. Type fluorescent lamps B are arranged in parallel, and the reflector C of the present invention is installed behind each lamp B.

The reflector C according to the present embodiment is a V-shaped first reflection plate c ₁ which is located behind the center of the lamp B and extends substantially symmetrically toward the left and right rear of the lamp, and both of the first reflection plate. It is composed of a second reflecting plate c ₂ which continuously projects to the front end toward the front and a third reflecting plate c ₃ which continuously projects to the front end of the second reflecting plate and projects toward the rear. Angle theta ₁ which the first reflector c ₁ of the V-shaped building, the angle theta ₂ which the second anti-radiation plate c ₂ with respect to the first reflector c ₁ overhangs, first against the second reflector c ₂ 3 reflector c ₃ is the angle theta ₃ to be output tension is in the illustrated example has been the obtuse angle, these angles should be defined in design by the distance between the lamp between distance and lamp and the translucent member .

An example of attachment means for the reflector C is shown in FIGS. Reference numeral 1 denotes a channel type column for mounting a lamp provided on the side of the lighting box, one end of an arm plate 2 is fixed to both upper and lower ends thereof, and a fluorescent lamp B is supported at a projecting end through a socket. The reflector C is located on the front surface of the column 1. The V-shaped first reflector c ₁ forming the reflector C has openings 3 near the upper and lower ends thereof, into which the reflector mounting member D is inserted. The mounting bracket D is formed by bending a strip-shaped metal plate into a substantially U-shape between the front plate 4 and the side plates 5 and 5, and providing the cut-and-raised claw pieces 6 and 6 protruding inward to the side plates 5 and 5, respectively. As shown in FIGS. 5 to 6, when the side plates 5 and 5 are put into the openings 3 and 3 and then slid along the side surface of the pillar 1, the claw pieces 6 and 6. The reflector 6 is released after passing through the side surface of the pillar 1, and is engaged with the rear surface of the pillar 1, whereby the reflector C is supported on the pillar side.

Further, as shown in FIG. 7, a wing-shaped metal fitting E is attached to a desired position of the pillar 1 with a screw 7, and a means for suppressing the rear surface of the reflector C by this metal fitting is added. It is possible to stabilize the reflector.

FIG. 8 shows an example of signboard illumination using the reflector C. This example is based on the standard design of a large signboard illumination, and the case where the distance between the fluorescent lamp and the translucent sheet a is set to 30 cm and the lamp interval is set to 50 cm. The angles θ ₁ , θ ₂ , and θ ₃ forming the first reflection plate c ₁ , the second reflection plate c ₂ , and the third reflection plate c ₃ of the reflector C are θ ₁ = 135 to 130 degrees, θ ₂ = 145 to 140 degrees and θ ₃ = 155 to 150 degrees.

In the illuminating device having the above-described configuration, as shown in FIG. 8, the first reflector c ₁ reflects the light emitted to the back of the lamp obliquely to the left and right, and irradiates the central zone between the lamps of the translucent sheet a. is doing. Further, the second reflector c ₂ irradiates the light radiated obliquely rearward of the lamp in a wide band including a central band between the lamps and a band directly below the lamp. Further, the third reflecting plate c ₃ reflects the lateral irradiation light of the adjacent lamp and irradiates the band from the central band between the lamps to the band immediately below the lamp. Moreover, the light reflected by the first to third reflecting plates intersects in front of the translucent sheet. It should be noted that the irradiation range of the light-transmitting sheet by the first to third reflecting plates in FIG. 8 is schematically shown for easy understanding.

As described above, the reflected light from the _first to third reflectors c ₁ , c ₂ , and c ₃ irradiates a wide band centering on the central band between the lamps of the translucent sheet a, The lamp image disappears. Moreover, it is possible to increase the illuminance of the entire transparent surface.

Next, an experimental example in which the lighting device according to the above embodiment is compared with a conventional lighting device will be described below. A row of 9 40 W straight tube fluorescent lamps arranged in parallel at 20 cm intervals at a distance of 30 cm on average from a signboard translucent sheet 8 m wide and 2 m long (16 m ² area). In a conventional lighting device that illuminates a translucent sheet with a total of 56 (2240W in total), which are arranged in 5 rows in the lateral direction and 11 are arranged upright on one side, The average surface illuminance of the sheet was 900 lux.

On the other hand, at a position 30 cm away from the translucent sheet, 16 fluorescent lamps of 52 W are arranged in the lateral direction at intervals of 50 cm (total of 822 W), and the reflectors having the above-mentioned configuration are arranged in each lamp. When the light-transmitting sheet is reflected by providing the lamp, there is no lamp image, and the illuminance on the light-transmitting surface is 1350 lux, which is 50% more than that of the conventional device. In addition, the power consumption could be saved by 63%.

FIG. 9 shows another embodiment of the present invention. In this embodiment, the distance between the lamp and the translucent sheet is 6 cm, which is an extremely short distance. When the distance between the lamp and the translucent sheet is short, the image of the lamp is strong. In order to eliminate the image of the lamp, the effect will not come out unless the lamps are spaced closely enough to fit the lamps together.

In the above embodiment, in order to solve the above problem, the third reflecting plate c ₃ continuous with the tip of the second reflecting plate c ₂ is formed to project inward, and the angles θ ₁ , θ ₂ , θ are set. The angle of ₃ and the length of each reflector are adjusted. In the illuminance device having the above structure, as shown in FIG. 9, the first reflector c ₁ irradiates the central zone between the lamps of the translucent sheet a ₁ , and the second reflector c ₂ illuminates the central zone between the lamps of the translucent sheet. The main reflector irradiates a wide band, and the third reflector c ₃ reflects the light emitted from the lamp (referred to as a self-luminous lamp) at that position similarly to the first and second reflectors. Irradiates a wide band including the central band between the lamps of the translucent sheet.

Next, an experimental example of the lighting device according to the above-mentioned embodiment will be described. Three 40 W straight tube fluorescent lamps were arranged in parallel at 40 cm intervals at a distance of 6 cm from the signboard translucent sheet 1.2 m wide and 1.2 m long. When the reflector is not used, the illuminance directly under the lamp of the translucent sheet is 2986 lux, and the illuminance in the center zone between the lamps is 950 lux, and the lamp image appears strongly. The illuminance directly below the lamp on the sheet was 3903 lux, and the illuminance in the central zone between the lamps was 4033 lux, and no lamp image was observed. Also, in this embodiment, a substantial significant power saving effect can be obtained as compared with the case of eliminating the lamp image by increasing the number of lamps instead of using the conventional reflector. The lighting device of this embodiment is suitable for a thin advertising sign attached to a platform of a station or a wall of an aisle.

FIG. 10 shows another embodiment of the present invention. The present embodiment is a case of a lighting device for medium and short distances in which the distance between the lamp and the translucent sheet is 11 cm, and the reflector C is composed of the first reflection plate c ₁ and the second reflection plate c _2. This is an example in which the third reflection plate is omitted. In the illuminating device having the above structure, as shown in FIG. 10, the first reflector c ₁ irradiates the central zone between the lamps of the translucent sheet, and the second reflector c ₂ has a wide centered zone between the lamps. Illuminating the band.

Next, an experimental example of the lighting device according to the above-mentioned embodiment will be described. Two 40 W straight tube fluorescent lamps were lit side by side at 31 cm intervals in parallel at a position 11 cm away from the signboard translucent sheet 4 m wide and 1.3 m long. When the reflector is not used, the illuminance directly below the lamp of the translucent sheet shows a value of 787 lux and the illuminance in the central zone between the lamps shows a value of 450 lux, and the lamp image appears strongly. The illuminance immediately below the lamp of the light sheet showed a value of 3006 lux and the central illuminance between the lamps showed a value of 2940 lux, and no lamp image was observed. Also in this embodiment, 80 W (2) is sufficient for 120 W (3), and the power saving effect can be obtained.

[0023]

EFFECTS OF THE INVENTION As described above, according to the present invention, the following effects can be obtained as a lighting device for advertising billboards. (1) By using a reflector with a special structure, it is possible to eliminate the lamp image and to significantly increase the illuminance of the translucent member displaying the signboard. (2) Compared with the conventional signboard lighting device, the number of fluorescent lamps used can be greatly reduced, and the power consumption can be significantly reduced. (3) By changing the angles and the lengths of the first to third reflectors constituting the reflector, the control of the irradiation light to the translucent sheet can be freely set. (4) It is easy to maintain and manage the lamp replacement in the space inside the signboard box. (5) It is possible to reduce the weight of the signboard illumination device as a whole and reduce the manufacturing cost.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a lighting device showing an embodiment of the present invention.

FIG. 2 is a plan view of a reflector.

FIG. 3 is a perspective view of a reflector mounting structure.

FIG. 4 is a perspective view of a mounting member.

FIG. 5 is a transverse cross-sectional view of the mounting structure portion in a state before the mounting bracket is mounted on the reflector.

FIG. 6 is a cross-sectional view of the mounting structure portion in a state after mounting the mounting bracket on the reflector.

FIG. 7 is a transverse cross-sectional view of a mounting structure in a state where a metal fitting is applied to a reflector.

FIG. 8 is a light-transmitting surface irradiation explanatory view showing an example of signboard illumination.

FIG. 9 is a light-transmitting surface irradiation explanatory view showing another example of signboard illumination.

FIG. 10 is a light-transmitting surface irradiation explanatory view showing another example of signboard illumination.

[Explanation of symbols]

A Lighting box body B Straight tube fluorescent lamp C Reflector c ₁ 1st reflector c ₂ 2nd reflector c ₃ 3rd reflector a Translucent sheet for advertisement display 1 Lamp support pillar 2 Support arm plate D Installation Metal fitting 3 Mounting opening on the reflector side 4 Front plate of mounting metal fitting 5 Side plate 6 Cut and raised claw E Abutting metal fitting 7 Mounting screw

Claims (3)

[Scope of utility model registration request] 1. A structure in which a large number of straight tube discharge lamps are arranged in parallel at intervals, a transparent member for advertisement display is arranged in front of a lamp row, and a reflector is provided on the rear side of each lamp. In the lighting device, the reflector reflects the light emitted to the back of the lamp obliquely to the left and right, and projects in a V shape toward the left and right of the lamp so as to irradiate the central zone between the lamps of the translucent member. The first reflector and the V-shaped first reflector are connected to both ends of the first reflector, respectively, to reflect light radiated obliquely rearward of the lamp and to form a wide band mainly in the central band between the lamps of the translucent member. An illuminating device comprising a second reflecting plate for irradiating. 2. A large number of straight tube discharge lamps are arranged in parallel at intervals, a translucent member for advertisement display is arranged in front of the lamp row, and a reflector is provided on the rear side of each lamp. In the lighting device, the reflector reflects the light emitted to the back of the lamp obliquely to the left and right, and projects in a V shape toward the left and right of the lamp so as to irradiate the central zone between the lamps of the translucent member. A wide range including a central band between lamps and a band directly below the lamp of the translucent member, which is continuous with both ends of the first reflector and the V-shaped first reflector and reflects light emitted obliquely rearward of the lamp. A second reflection plate for irradiating a band and a tip of the second reflection plate are connected to reflect the lateral irradiation light of an adjacent lamp to irradiate a band from the central band between the lamps of the translucent member to the band immediately below the lamp. Lighting device comprising a third reflecting plate Place 3. A lighting system in which a large number of straight tube discharge lamps are arranged in parallel at intervals, a transparent member for advertisement display is arranged in front of a lamp row, and a reflector is provided behind each lamp. In the device, the reflector reflects the light emitted to the back of the lamp obliquely to the left and right, and projects in a V shape toward the left and right of the lamp so as to irradiate the central zone between the lamps of the translucent member. One reflector and the V-shaped first reflector are connected to both ends respectively to reflect light emitted obliquely rearward of the lamp and illuminate a wide band mainly in the central region between the lamps of the translucent member. And a second reflection plate that is connected to the tip of the second reflection plate, and reflects light emitted obliquely rearward of the lamp,
An illuminating device comprising: a third reflecting plate that illuminates a wide band including a center band between the lamps of the translucent member.