JPH0927206A - Wall mount luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve uniformity of wall surface illumination by increasing light diffusion for eliminating light irregularity. SOLUTION: Louvers 17,... provided on a front surface part of a luminaire frame 11 are composed of a reflection and diffusion panel 18 of a relatively low light transmittance to regulate the light radiation direction and a diffusion damping panel 19 of a relatively high light transmittance to diffuse and damp light in the crossing direction to the louver 17 on the back of the reflection and diffusion panel 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wall surface lighting device for illuminating a side wall surface, a ceiling surface, a floor surface in a building, and a vertical or horizontal wall surface such as a signboard.

[0002]

2. Description of the Related Art In a wall lighting apparatus, for example, in a museum or a museum, the side wall surface on which paintings, photographs, etc. are displayed as a basic lighting means is uniform from top (ceiling surface side) to bottom (floor surface side) with substantially the same illuminance. Used to illuminate.

Conventionally, as shown in FIG. 4, this wall lighting fixture has one or a plurality of light sources (fluorescent lamps) 2 ...
And a reflector 3 for reflecting the light from the light sources 2 to the front side of the equipment frame, and a plurality of louvers 4 for reflecting and diffusing the light on the front side of the equipment frame. It is installed in parallel at intervals and is installed on the ceiling surface when illuminating the side wall surface. Reference numeral 5 is a louver frame to which the louvers 4 ... Are attached.

Here, the illuminance on the wall depends on the distance from the device and the incident angle of light, and in order to uniformly illuminate the entire side wall surface, the amount of light on the ceiling side portion close to the device is reduced and the distance from the device is increased. It is necessary to increase the amount of light on the floor side.

For example, as shown in FIG. 5, the height is 3.5.
When 100 Lx of the side wall surface W1 of m is uniformly illuminated by the luminaire A installed on the ceiling surface W2 that is 1.5 m away from the side wall surface W1, in order to uniformly illuminate the entire side wall surface W1, the ceiling surface W2 The required luminous intensity at the side edge (incident angle 0 °) is 225 cd, whereas the luminous intensity at the side edge on the floor W3 (incident angle 66.8 °) is approximately 16 times that of 3681 cd.

The louvers 3 are for controlling the light for such uniform illumination, and are made of a thin steel plate coated with white on both sides. The light passes through the lower part of the side wall surface W1 almost straightly. It blocks the light from the upper part and plays the role of limiting the amount of light by reflecting and diffusing it.

[0007]

However, according to the conventional wall illuminator using the louvers 3 ... Of such a high reflection type metal plate alone, the louver 3 ... As a result of insufficient light diffusing action, there is a problem that a band-shaped shadow corresponding to the louver 3 is generated particularly on the upper portion of the side wall surface to cause uneven illumination, and the intended purpose of uniform illumination is not sufficiently achieved.

[0008] Therefore, the present invention provides a wall illuminator capable of enhancing the uniformity of wall illumination by enhancing the light diffusion effect of the louver to eliminate light unevenness.

[0009]

According to a first aspect of the invention, a plurality of louvers are provided at intervals on a front surface of an instrument frame having a light source provided therein, and the louvers relatively transmit light. A reflective diffusion panel that has a low rate and regulates the irradiation direction of light,
It is composed of a diffusion attenuation panel which has a relatively high light transmittance and diffuses / attenuates light behind the reflection diffusion panel.

According to a second aspect of the present invention, in the structure of the first aspect, the reflective diffusion panel is formed of a metal plate, the diffusion attenuation panel is formed of a milky white plastic plate, and these are integrally connected. is there.

According to a third aspect of the present invention, in the configuration of the second aspect, an acrylic resin plate is used as the plastic plate.

According to the above structure, the high reflection type reflective diffusion panel having a relatively low light transmittance plays a role of particularly controlling the irradiation direction of light, and the diffusion attenuation panel having a high light transmittance serves as a reflective diffusion panel. It plays the role of diffusing and attenuating the light in the direction intersecting the louvers in the foreground.

Due to the synergistic effect of these two types of panels, the light diffusion effect and the light attenuation effect in the direction intersecting the louver are enhanced in the louver as a whole.

Thus, for example, when illuminating the side wall surface from the ceiling surface, the louver diffuses and attenuates the light to the upper part of the side wall surface to eliminate the band-shaped shadow and cause light unevenness. Can be prevented.

On the other hand, straight light is guided to the lower portion of the side wall surface by the louver (particularly, the reflection / diffusion panel).

Since each louver has a pseudo light source individually due to the light diffusing action of the diffusion attenuating panel, the amount of light emitted to the lower portion of the side wall surface is substantially increased.

Due to these two points, the illuminance is increased at the lower portion of the side wall surface as compared with the case of using a louver having no diffusion attenuation panel, so that the uniformity of the illuminance at the upper and lower portions of the side wall surface is improved.

Further, according to the second aspect of the present invention, since the louver is formed by integrally connecting the reflection diffusion panel and the diffusion attenuation panel to each other, the louver can be installed as compared with the case where these are separately attached. Easy to install.

Further, according to the third aspect of the invention, since the diffusion attenuation panel is formed of the acrylic resin plate having high heat resistance, there is no fear of deformation of the panel due to the heat of the light source.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to FIGS.
It will be explained by. In the following embodiments, a luminaire for illuminating a side wall surface in a building is used as an application target in accordance with the conventional description.

In the figure, reference numeral 11 denotes an equipment frame attached to the ceiling surface W2. One to a plurality of (three in the illustrated example) light sources 12 are provided in the equipment frame 11, and light from the light sources 12 is reflected to the front side. And a reflection plate 13 for allowing the reflection. Reference numeral 14 is a heat radiation hole provided in the equipment frame 11, and 15 is a ceiling panel installed below the ceiling surface W2.

Further, a frame-shaped louver frame 16 is attached to the front surface portion of the device frame which is the exit of light, and a large number of louvers 17 are provided in parallel to the louver frame 16 at regular intervals.

The louvers 17 basically irradiate the light source light toward the lower part of the side wall surface (in the range of 0.3 m to 0.5 m on the floor surface of the side wall surface W1 in the example of illumination shown in FIG. 5). Angle θ
(70 ° to 75 ° in the above example).

Each louver 17 has a reflective diffusion panel 18 and
Adhesive to this reflective diffusion panel 18 on the inside of the device frame,
It has a composite panel structure including a diffusion damping panel 19 which is integrally connected by means of screws or the like.

The diffusion damping panel 19 has flanges 19a at both ends in the length direction, and the flanges 19a are screwed to the louver frame 15.

The reflection / diffusion panel 18 is a thin steel sheet (for example, 1.0 mm thick) coated on both sides with white, the diffusion attenuation panel 1
9 is slightly thick processed into milky white (for example, thickness 2.0
mm) of acrylic resin plate, and has the following functions.

Reflection / diffusion panel 18: The light transmittance is relatively low (the light reflectance is high), and the irradiation direction of light is regulated to the direction determined by the louver angle θ, and the reflection / diffusion panel 18 adjacent thereto is Light is diffused by repeating the reflection action between them.

Diffusion attenuation panel 19: It has a relatively high light transmittance and diffuses light in the direction intersecting with the louver 17 in multiple directions, and at the same time absorbs and attenuates the light.

Due to the synergistic effect of the different actions of the two panels 18 and 19, the louver 17 as a whole has a light diffusing action,
The attenuating action of light in the direction intersecting with the louver 17 is enhanced.

As a result, when the side wall surface is illuminated, (a) the upper part of the side wall surface W1 is attenuated by the louver 17 and radiated so that the absolute light amount is reduced and at the same time, The band-shaped shadow disappears due to the multidirectional diffusion effect.

(B) Straight light and reflected light are guided to the lower portion of the side wall surface by the reflection / diffusion panel 18 having a particularly high light reflectance.

(C) As shown in FIG. 3, each louver 17 has its own pseudo light source A due to the light diffusing action of the diffusion attenuating panel 19, so that the amount of light irradiated to the lower portion of the side wall surface is substantially. Increase.

As a result of (a), (b) and (c), light unevenness does not occur and the illuminance of the upper and lower portions of the side wall surface is reduced as compared with the case where a louver made of a metal plate alone without the diffusion attenuation panel 19 is used. It is possible to uniformly illuminate the entire side wall surface.

As a material of the diffusion attenuation panel 19, various plastic plates such as polycarbonate and vinyl chloride can be used in addition to the acrylic resin plate. However, when an acrylic resin plate is used, the heat resistance is high, and the deformation due to the heat of the light source does not occur, so the durability of the device is improved.

By the way, in the above embodiment, the louver 17 is used.
Although the reflection and diffusion panel 18 and the diffusion attenuation panel 19 constituting the above are integrally connected, the two panels 18 and 19 may be separately provided and separately attached to the louver frame 16.

As the material of the diffusion attenuating plate 19, a non-plastic material having a light diffusing / attenuating action equivalent to that of a plastic plate such as an acrylic resin plate may be used.

Further, in the above-mentioned embodiment, the case where the side wall surface is illuminated by being installed on the ceiling surface in the building is taken as an example. However, the present invention is an apparatus for illuminating the side wall surface by installing it on the floor surface, and the ceiling surface. It can be widely applied to various wall lighting devices such as a lighting device for illuminating a wall, a lighting device for a signboard, and the like.

[0038]

As described above, according to the present invention, the louver provided on the front surface of the instrument frame is provided with a reflection diffusion panel which has a relatively low light transmittance and regulates the light irradiation direction. Since it is composed of a diffuse attenuation panel that has a high light transmittance and diffuses and attenuates the light in the direction that intersects the louver in front of the reflective diffusion panel, the synergistic action of these two types of panels makes The diffusing action and the attenuating action of light in the direction intersecting the louver are enhanced.

Thus, for example, when illuminating the side wall surface from the ceiling surface, the louver diffuses and attenuates the light to the upper part of the side wall surface to eliminate the band-shaped shadow and to generate light unevenness. Can be prevented.

On the other hand, since the straight light is guided to the lower part of the side wall surface by the louver (particularly the reflective diffusion panel) and each louver has a pseudo light source due to the light diffusion action in the diffusion attenuation panel, the side wall surface is formed. The amount of light that illuminates the bottom is substantially increased.

Due to these two points, the illuminance is increased at the lower portion of the side wall surface as compared with the case of using a louver having no diffusion attenuation panel, so that the uniformity of the illuminance at the upper and lower portions of the side wall surface can be improved. it can.

According to the second aspect of the present invention, since the louver is formed by integrally connecting the reflection diffusion panel and the diffusion attenuation panel to each other, the louver can be installed as compared with the case where these are separately attached. Easy to install.

Further, according to the invention of claim 3, since the diffusion attenuation panel is formed of an acrylic resin plate having high heat resistance, there is no fear of deformation of the panel due to the heat of the light source and the durability of the instrument is improved. Can be improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a lighting fixture according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged perspective view of a louver alone in the same device.

FIG. 3 is a diagram for explaining the operation of the louver.

FIG. 4 is a cross-sectional view showing a conventional wall lighting fixture.

FIG. 5 is a diagram for explaining the uniform illumination action of the side wall surface by the wall surface lighting fixture.

[Explanation of symbols]

 11 Instrument Frame 12 Light Source 13 Reflector 17 Louver 18 Reflective Diffusion Panel 19 Comprising Louver 19 Diffuse Attenuation Panel

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeshi Hatori 5-2-10 Tsuruhashi, Ikuno-ku, Osaka City Daiko Electric Co., Ltd.

Claims (3)

[Claims] 1. A plurality of louvers are provided at intervals on a front surface of an instrument frame having a light source provided therein, and the louvers have a relatively low light transmittance and regulate an irradiation direction of light. A wall luminaire comprising a reflection / diffusion panel and a diffusion / attenuation panel having a relatively high light transmittance and diffusing / attenuating light behind the reflection / diffusion panel. 2. The reflective diffusion panel is formed of a metal plate,
The wall luminaire according to claim 1, wherein the diffusion attenuating panel is formed of a milky white plastic plate, and these are integrally connected. 3. The wall lighting fixture according to claim 2, wherein an acrylic resin plate is used as the plastic plate.