JPH07201212A - Lighting device - Google Patents

Abstract

PURPOSE:To provide a lighting device producing comfortable work circumstaces and visual circumstances while changing luminousity distribution around the side according to types of working, working positions, interval of mounting in an office room and the like. CONSTITUTION:This device is provided with a main body having a fluorescent lamp 2 and an electronic stabilizer and being arranged at a ceiling, a frame board 10 at longitudinal opposed ends of the main body, and side louvers 8a, 8b changing a light irradiation direction while being positioned at least at one side. With a turning shaft 9 at the longitudinal opposed ends of the side louvers 8a, 8b, the louvers 8a, 8b are mounted on the board 10 so as to turn freely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting fixture for illuminating an office room or the like.

[0002]

2. Description of the Related Art Generally, in order to realize a comfortable visual environment and working environment by lighting in an office room or the like, it is necessary to control the brightness distribution in the room, ceiling, and wall surfaces and remove unpleasant glare. Many lighting fixtures have been proposed in consideration of the above. For example, a louver-equipped luminaire described in Japanese Patent Laid-Open No. 4-359803 is shown in FIGS. 20 and 21. Figure 2
21 is an external view of the conventional lighting fixture from below, and FIG.
FIG. 21 is a cross-sectional view of the lighting fixture of FIG. 20. 20 and 21
In the figure, 1 is a lighting fixture body of an exposed lighting fixture directly attached to the ceiling, 2 is two fluorescent lamps, 20 is a plurality of louvers, 21
Is a reflective frame plate interposed between the two fluorescent lamps 2, and 22 is a frame plate vertically opposed to each other with the two fluorescent lamps 2 interposed therebetween. In this louvered luminaire, a plurality of louvers 20 are assembled into a louver frame with two frame plates 22 centering on a reflective frame plate 21 to form a louver frame, and the louver frame is provided with the luminaire main body 1 via the reflective frame plate 21. It is attached to.

The reflection frame plate 21 is provided to increase the effect of glare cut by mounting the louver frame on the main body 1 of the luminaire and increasing the light-shielding angle from one fluorescent lamp 2 to the other direction. . Further, the frame plate 22 is formed of a light-transmitting material, and the ceiling-side upper portion of the frame plate 22 is tilted in the direction of the axis along the axis of the lighting fixture body 1 so that the light reflected from the ceiling surface of the frame plate 22 is reflected. It is bent so as to cause secondary reflection on the inclined surface.

Therefore, the direct light emitted from the fluorescent lamp 2 can reduce the brightness contrast between the frame plate 22 forming the louver frame and the light reflecting surface of the ceiling, and the ceiling surface near the main body 1 of the luminaire is illuminated brightly. As a result, the glare of the lighting equipment was cut, and a comfortable lighting viewing environment was realized.

[0005]

However, in the conventional lighting fixture described above, the amount of light directed to the side can be changed by changing the light transmittance of the frame plate 22, but the frame plate 22 is fixed. Therefore, it is not possible to selectively irradiate in a certain direction. Therefore, the conventional luminaire has a problem that it is impossible to change the illuminance distribution around the ceiling surface or the louver in order to make the indoor work environment comfortable.

[0006] Further, since the lateral irradiation light is somewhat obstructed by the frame plate 22, the efficiency of the luminaire is lowered, but if the light transmittance of the frame plate 22 is increased in order to avoid this, However, there is an inconvenient problem that the entire area around the lighting equipment becomes bright and glare is felt. Further, when performing the VDT work under the above conventional lighting fixture, since the gap is provided between the lighting fixture body 1 and the frame plate 22 above, the frame plate 2
Even if the light transmittance of 2 is set to zero, the amount of light radiated to the side or the ceiling surface does not become zero, and as a result, the light is reflected on the CRT screen, which hinders the work. .

The present invention has been made to solve the above-mentioned problems, and the direction of the light radiated to the periphery of the side of the luminaire according to the work content, work position, mounting interval of the luminaire, etc. The object of the present invention is to obtain a luminaire that realizes a comfortable working environment and visual environment by changing the illuminance distribution around the side of the luminaire.

[0008]

According to a first aspect of the present invention, there is provided a lighting fixture main body having an illumination lamp and a lighting device which is installed on a ceiling, and the lighting fixture main body is provided at both ends in the longitudinal direction. A frame plate and side louvers provided on at least one side of the lighting fixture body to change the irradiation direction of light, and by rotating shafts provided at both longitudinal ends of the side louver. The side louvers are rotatably attached to the frame plate.

The side louvers of the lighting apparatus according to claim 2 of the present invention are provided on the upper and lower sides of the side of the lighting apparatus main body, and are provided on the frame plate so as to rotate integrally with the rotating shaft. It is attached.

Two or more of the side louvers of the lighting apparatus according to claim 3 of the present invention are provided above and below the side of the lighting apparatus main body, and each side louver is provided with a rotating shaft provided for each side louver. It is attached to the frame plate so as to rotate independently.

Any one of the side louvers of the lighting fixture according to the fourth aspect of the present invention has a length that reaches the ceiling surface side of the lighting fixture main body by rotating.

Any one of the side louvers of the luminaire according to the fifth aspect of the present invention is such that a part or all of the upper surface is formed of a mirror surface material.

Any one of the side louvers of the luminaire according to claim 6 of the present invention has a sectional shape which is a concave curve with respect to the ceiling surface side of the luminaire main body.

The lateral louvers of the luminaire according to claim 7 of the present invention are provided two or more above and below the lateral side of the luminaire main body, and any one of them has a length orthogonal to the longitudinal direction. It is different.

According to the eighth aspect of the present invention, at least two lateral louvers are provided above and below the lateral side of the luminaire main body, and the distance between any one of the adjacent lateral louvers is variable. It is attached to the frame plate so that

The side louver of the luminaire according to claim 9 of the present invention is provided with a light transmitting material having a predetermined transmittance for adjusting the amount of transmitted light from the side.

[0017]

In the luminaire according to claim 1 of the present invention,
By rotating the side louver, the direction of the light radiated around the side of the lighting fixture can be changed, so that the illuminance distribution inside the side of the lighting fixture and inside the room becomes variable.

In the luminaire according to the second aspect of the present invention, the lateral louvers provided above and below the side of the luminaire main body are integrally rotated to irradiate the periphery of the luminaire side. Since the direction of the emitted light can be changed, the illuminance distribution around the side of the lighting fixture and in the room can be changed.

In the luminaire according to the third aspect of the present invention, by independently rotating each of the two lateral louvers provided above and below the lateral side of the luminaire main body, the luminaire lateral periphery is obtained. Also, it is possible to finely change the illuminance distribution and the amount of light radiated toward the ceiling surface.

In the luminaire according to claim 4 of the present invention, any one of the lateral louvers provided on at least one side of the luminaire main body is rotated to rotate the luminaire main body. Since the length reaches the ceiling surface side, it is possible to completely cut off the irradiation of light to the side periphery of the lighting equipment and the ceiling surface when the lighting equipment is rotated up and down.

In the luminaire according to claim 5 of the present invention, a part or the whole of the upper surface of any one of the side louvers is made of a mirror surface material, so that the light on the upper side of the side louvers is positive. High reflectance.

In the luminaire according to claim 6 of the present invention, since the cross-sectional shape of any one of the side louvers forms a concave curve with respect to the ceiling surface side of the luminaire main body, this side By rotating the direction louver, it is possible to efficiently irradiate light around the side of the lighting fixture and toward the ceiling surface.

In the luminaire according to claim 7 of the present invention, since any one of the side louvers has a length different from that of the other side louvers, the side louver is illuminated by rotating the side louver. The light radiated to the side of the equipment and to the ceiling surface can be scattered, and the light can be radiated efficiently.

In the luminaire according to claim 8 of the present invention, two or more lateral louvers are provided above and below the lateral side of the luminaire main body, and an interval between any one adjacent lateral louvers is changed. By doing so, it is possible to change the illuminance distribution and the amount of light that is irradiated to the side of the lighting fixture and to the ceiling surface direction.

In the luminaire according to claim 9 of the present invention, a light transmissive material having a predetermined transmittance for adjusting the amount of transmitted light from the side is attached, so that the illuminator irradiates to the lateral side and the ceiling surface direction. The amount of light emitted can be changed.

[0026]

【Example】

Example 1. FIG. 1 is a perspective view of an embodiment of a lighting fixture according to the present invention with an upper portion omitted, and FIG. 2 is a sectional view of the lighting fixture of FIG.

In FIG. 1 and FIG. 2, 1 is a lighting fixture main body of a ceiling-mounted exposed lighting fixture, 2 is two fluorescent lamps attached to the lighting fixture main body 3, and 3 is a built-in lighting fixture main body 1. An electronic ballast, 4 is a top reflector provided on the ceiling surface side of the luminaire body 1 and painted white, and 10 is the luminaire body 1
The frame plates are provided at both ends in the longitudinal direction of, and are attached to the luminaire main body 1. Reference numeral 7 is a white V-shaped reflection frame plate which is interposed between the two fluorescent lamps 2 and forms a part of the lighting fixture body 1. Reference numerals 8a and 8b denote two side louvers made of a non-translucent synthetic resin provided on the side of the lighting fixture body 1. The side louvers 8a and 8b are fixed to form a box-shaped tubular shape. ing. The upper surfaces of the side louvers 8a and 8b are made of aluminum sheet as a mirror surface material in order to improve the directivity of upward light irradiation. 9 is a side louver 8a, 8b
Of the rotary shafts provided on both end plates of the
Thus, the side louvers 8a and 8b are attached to the frame plate 10 so as to rotate 180 degrees in both forward and reverse directions. Reference numeral 5 denotes a plurality of horizontal louvers arranged in parallel to the fluorescent lamp 2, 6 denotes a plurality of vertical louvers arranged at a right angle to the fluorescent lamp 2, and 11 denotes a plurality of horizontal louvers 5 and vertical louvers. 6 is a lattice-shaped lower louver that assembles 6 into a lattice to form a louver frame and emits light downward, and is attached to the frame plate 10 with the V-shaped reflection frame plate 7 as the center.

As shown in FIGS. 1 and 2, the lighting fixture of the present embodiment has a horizontal louver 5 for irradiating light downward to a lighting fixture main body 1 provided with a lighting device such as a fluorescent lamp 2 and an electronic ballast 3. And vertical louvers 6 and rotatable side louvers 8a, 8 that can change the direction of light irradiation to the side and the upper direction.
b is attached. Further, since the white reflector is used as the upper reflector 4, the lamp image of the fluorescent lamp 2 cannot be observed.

The V-shaped reflection frame plate 7 is provided on one side of the fluorescent lamp 2
To increase the light-shielding angle with respect to the other fluorescent lamp 2 to increase the effect of glare cut. Further, the lower louver 11 is for reducing light irradiation in a so-called glare zone (a zone in which a vertical angle is 60 degrees or more with 0 degrees directly below the fluorescent lamp 2).

The side louvers 8a and 8b are rotated according to the purpose of irradiating the ceiling surface, or the upper part of the wall surface in some cases, to change the irradiation direction of the light so that the side periphery of the luminaire main body 1 and The illuminance distribution in the room can be changed. The side louvers 8a and 8b are structured to be manually rotated about a rotation shaft 9 parallel to the longitudinal direction of the fluorescent lamp 2. As a matter of course, the means for rotating the side louvers 8a, 8b is not limited to manual operation, but may be a method of using a motor and performing remote operation using a remote controller.

FIG. 3 and FIG. 4 are sectional views of the lighting fixture shown in FIGS. 1 and 2 showing another usage pattern in which the side louvers 8a and 8b of the lighting fixture are rotated. FIG. 3 shows a side louver 8a,
8b when it is rotated about 10 degrees downward, and FIG. 4 shows the side louvers 8a and 8b about 30 degrees upward.
It is when rotated once. In addition, light distribution curves of luminous intensity measured using the fluorescent lamp 2 having a light source luminous flux of 8600 Lm in each of the usage patterns of FIGS. 2 to 4 are shown in FIGS. Each measured light distribution curve passes through the center of gravity of the fluorescent lamp 2
It is the luminous intensity per 1000 Lm measured in a plane perpendicular to the axis. 2 corresponds to FIG. 5, FIG. 3 corresponds to FIG. 6, and FIG. 4 corresponds to FIG.

In the usage pattern of FIG. 2, the ceiling surface, which has a large vertical angle as shown in FIG. 5, does not become so bright, but the vertical angle of 80 ° to 11 ° is centered around the vertical angle of 90 °.
The range of 0 degree can be mainly irradiated. In the usage pattern of FIG. 3, the fluorescent lamp 2 is easily visible directly, but as shown in FIG. 6, light is emitted in the range of 65 to 100 degrees of the vertical angle centering on the vertical direction of 80 degrees, and the efficiency is the best. In the usage pattern of FIG. 4,
As shown in FIG. 7, light is emitted not only in the vertical direction of 90 degrees but also in the direction of 120 degrees, and the ceiling surface can be illuminated most efficiently in the usage patterns of FIGS.

Further, as shown in the measured light distribution curve of FIG. 7, even in the case of the usage pattern of FIG. 4, the efficiency of the downward irradiation light is hardly reduced, and the light is emitted even in the vicinity of the vertical angle of 90 degrees. It is irradiated. When the side louvers 8a and 8b are rotated, it is clear from the measured light distribution curves in the other figures that the irradiation direction of light at a large vertical angle changes, which means that the side louvers 8a , 8b can be rotated,
It means that it affects the indoor light environment and light distribution.

Further, since it is considered that the range of the luminaire row in which the side irradiating light is unpleasant as glare is about 3 to 5 rows, the luminaire of this embodiment has a height of 180 cm when a person stands up. The luminaire sets the glare from the luminaires closer to the 3rd to 5th rows within the reference value. The glare standard is based on the "New Standards for Office Lighting by the Institute of Illumination (1991)", and there is an agreement on the luminous flux irradiated to the so-called glare zone within 30 degrees from the horizontal, as shown in Table 1.

[0035]

[Table 1]

The glare from the luminaire located at a position farther than 3 to 5 rows has a small pitch of the bright and dark stripes by the glare source, and the brightness modulation degree of the bright and dark stripes is also reduced by the irradiation on the ceiling surface. Become. Side louver 8
In the case of FIG. 4 in which a and 8b are rotated upward, vertical angles 65, 75 according to the new office lighting standard
Since glare classification evaluation was performed at 85 degrees, the results are shown in Table 2.

[0037]

[Table 2]

In Table 2, the light emitting area is equal to the area occupied by the luminaire, and the apparent light emitting area is the area viewed from each vertical angle. The luminous intensity is a value obtained by multiplying the actual measurement value shown in the light distribution curve of FIG. 7 by 8600/1000. The value obtained by dividing the luminous intensity by the apparent total area of light emission is the average luminance. From the comparison between the result values in Table 2 and the reference values in Table 1, the luminaire of this example is compatible with G1, and can be also adapted with G0 by adjusting the luminous intensity at the vertical angle of 85 degrees.
For the direction of 85 degrees or more, the glare standard is not particularly defined, but as shown in FIG. 7, considerable light is emitted in the direction of the ceiling surface even when the angle is 85 degrees or more.

As a result, the luminaire of the present embodiment is a luminaire that satisfies the glare standard and can illuminate the ceiling surface widely and brightly. Further, as described above, not only the direction of the ceiling surface but also the direction of irradiation can be selectively changed, so that the visual environment can be improved under the condition that meets the glare standard.

In this embodiment, the side louvers 8a and 8b are provided on both sides of the luminaire main body 1, but the side louvers 8a and 8b may be provided on only one side of the luminaire main body 1. . Further, although the side louvers 8a and 8b are shown to consist of two sheets, the number of the side louvers 8a and 8b may be one or two or more.
Further, although the side louvers 8a and 8b of the present embodiment are shown to be made of the non-translucent synthetic resin, the side louvers 8a and 8b are not limited to the synthetic resin and may be made of a steel plate or other material that does not transmit light. . Further, in this embodiment, an aluminum sheet as a mirror surface material is used on the upper surfaces of the side louvers 8a and 8b, but an aluminum sheet may be used for either of the side louvers 8a or 8b. Desirably, the upper surfaces of all the side louvers are mirror-finished.

Example 2. FIG. 8 is a perspective view from below of a lighting fixture according to a second embodiment of the present invention. FIG. 9 is a sectional view of the lighting fixture of FIG. 1 and 2 of the first embodiment
Although the case where the side louvers 8a and 8b are directed to the side of the lighting fixture is shown in this embodiment, in the present embodiment, the side louvers 8a and 8b are rotated in the vertical direction of the lighting fixture as shown in FIGS. 8 and 9. The side louvers 8a and 8b have such a length as to reach the ceiling surface side of the lighting fixture body 1 when the above. Therefore, according to the present embodiment, it is possible to completely block the irradiation of light to the side of the luminaire main body 1. For example, when performing VDT work indoors, if the side louvers 8a and 8b are used in this manner, C
It is possible to eliminate the reflection of light on the RT screen. Further, as shown in FIG. 10, the right side louvers 8a and 8b are provided.
Toward the up and down direction of the lighting fixture, the left side louver 8a,
By tilting 8b laterally, it is possible to illuminate only the wall side, for example when the wall is on the left side of FIG.

Next, FIG. 11 shows an actually measured light distribution curve in the usage pattern of FIG. The measured light distribution curve in FIG.
It is the result of actual measurement in the plane passing through the center of gravity of and perpendicular to the two axes of the fluorescent lamp. In FIG. 11, it is clear that there is no irradiation light to the side (vertical 90 ° direction).

In this embodiment, the side louvers 8a and 8b are provided on both sides of the luminaire main body 1, but the side louvers 8a and 8b may be provided on only one side of the luminaire main body 1. . Further, although the side louvers 8a and 8b are shown to consist of two sheets, the number of the side louvers 8a and 8b may be one or two or more.

Example 3. FIG. 12 is a sectional view of a lighting device according to a third embodiment of the present invention. Example 1 and Example 2
In the above, the upper and lower side louvers 8a and 8b are shown to have a flat cross section, but in the present embodiment, as shown in FIG. 12, a concave curve is formed on the ceiling surface side of the lighting fixture body 1. I am doing it. Therefore, according to this embodiment, the lateral louver 8
By rotating a and 8b, side louvers 8a and 8b
Since the light reflected by can be collected in a certain direction, for example, a part of the ceiling surface, it is possible to efficiently irradiate the light laterally and upward of the lighting fixture.

In this embodiment, the side louvers 8a and 8b are provided on both sides of the luminaire main body 1, but the side louvers 8a and 8b may be provided on only one side of the luminaire main body 1. . Further, although the side louvers 8a and 8b are shown to consist of two sheets, the number of sheets may be one sheet or two or more sheets,
In this case, any one may have a concave curve with respect to the ceiling surface side of the lighting fixture body 1.

Example 4. FIG. 13 is a sectional view of a lighting device according to a fourth embodiment of the present invention. In Examples 1 to 3 described above, the lateral louvers 8a and 8b are composed of two upper and lower sheets, and the upper and lower sides have the same length orthogonal to the longitudinal direction. However, in the present Example, as shown in FIG. The length of the lateral louver 8a near the ceiling surface is longer than that of the lateral louver 8b mounted away from the ceiling surface. Therefore, according to the present embodiment, by rotating the side louvers 8a, 8b, the amount of light reflected by the side louvers 8a, 8b and emitted to the side or the upper side is changed. Alternatively, the light emitted toward the ceiling surface is scattered and can be efficiently emitted. Further, the unevenness of the brightness distribution on the ceiling surface can be reduced.

The lengths of the side louvers 8a and 8b of the curved section having a concave cross section as shown in FIG. 14 can be changed.
13 and 14 show an example in which the length of the lateral louver 8a close to the ceiling surface is large, but the opposite case is also possible and it is sufficient if the lengths are different. Further, although the example in which the side louvers 8a and 8b are provided on both sides of the luminaire main body 1 is shown in the present embodiment, the side louvers 8a and 8b are provided only on one side of the luminaire main body 1.
8b may be provided.

Example 5. FIG. 15 is a perspective view from above a side louver of a lighting fixture according to a fifth embodiment of the present invention. In FIG. 15, reference numeral 10 denotes frame plates provided at both ends in the longitudinal direction of the luminaire main body 1 (not shown).
Is attached to. Reference numerals 8c and 8d denote two lateral louvers provided on the side of the lighting fixture body 1, 9a denotes a rotary shaft provided on both end plates in the longitudinal direction of the lateral louver 8c, and 9b denotes a longitudinal direction of the lateral louver 8d. The side louvers 8c and 8d are pivot shafts provided on both end plates and are pivotally attached to the frame plate 10 by pivot shafts 9a and 9b. Example 1 above
4 to 4, an example in which the two side louvers 8a and 8b rotate together is shown, but in the present embodiment, the side louvers 8c and 8b.
d is rotatably attached to the frame plate 10 by rotating shafts 9a and 9b, respectively, so that they can be independently rotated. As a result, the directivity of the light reflected by the side louvers 8c and 8d and emitted laterally or upward can be widely changed.

FIG. 16 is a cross-sectional view of a lighting device showing an example of a usage pattern according to the fifth embodiment of the present invention. The side louver 8c is rotated upward and the side louver 8d is rotated downward. It was moved. As described above, in this embodiment, the directions of the light reflected by the side louvers 8c and 8d can be changed variously.
The turning angle can be changed according to the purpose of use.

In this embodiment, the side louvers 8c and 8d are provided on both sides of the luminaire main body 1, but the side louvers 8c and 8d may be provided on only one side of the luminaire main body 1. . Further, although the side louvers 8c and 8d are shown to be composed of two sheets, the number of the side louvers 8c and 8d may be two or more, and each can be independently rotated.

Example 6. FIG. 17 is a perspective view from above of a side louver of a lighting fixture according to a sixth embodiment of the present invention. In FIG. 17, 8c, 8d, 9a and 9b are the same as those shown in FIG. Frame plates 10 are provided at both ends of the lighting fixture body 1 (not shown) in the longitudinal direction, and are attached to the lighting fixture body 1. The frame plate 10 is provided with a shaft guide portion 12 having a shape in which a downward vertical groove is continuous at both ends of a U-shaped groove for guiding the rotation shaft 9a. The side louvers 8c and 8d are attached to the frame plate 10 so as to be independently rotatable by rotating shafts 9a and 9b. Side louver 8
The position c of the rotating shaft 9a can be changed by changing the position of the rotating shaft 9a within the shaft guide portion 12 and the distance between the side louvers 8d. Therefore, according to the present embodiment, the side louvers 8c, 8c
By changing the distance of d and rotating it, the direction of the light reflected by the side louvers 8c and 8d is changed, and the amount of light emitted sideways or upward can be changed.

In this embodiment, the side louvers 8c and 8d are provided on both sides of the luminaire main body 1, but the side louvers 8c and 8d may be provided on only one side of the luminaire main body 1. . Further, although the side louvers 8c and 8d are shown to be composed of two sheets, the number of sheets may be two or more, and the respective intervals can be made variable.

Example 7. FIG. 18 is a sectional view of a lighting device according to a seventh embodiment of the present invention. FIG. 19 is a perspective view of a side louver in the lighting fixture of FIG. In this embodiment, as shown in FIGS. 18 and 19, a light transmitting material 13 made of a light transmitting material is attached between the side louvers 8a and 8b. The method of attaching the light transmitting material 13 may be a screw, an adhesive, or another method. By attaching the light transmitting material 13 between the side louvers 8a and 8b, the amount of light emitted to the side of the luminaire or to the ceiling surface can be changed. Moreover, if a material having a light transmittance that matches the desired brightness is used as the material of the light transmitting material 13, the amount of light radiated to the side can be adjusted, and the visual environment can be improved.

In this embodiment, the side louvers 8a and 8b are provided on both sides of the luminaire main body 1, but the side louvers 8a and 8b may be provided on only one side of the luminaire main body 1. . Further, although the side louvers 8a and 8b are shown to consist of two sheets, the number of sheets may be two or more, and in this case, between all the side louvers or between a pair of side louvers. The light transmitting material 13 may be attached to. Further, the number of the side louvers may be one, and in this case, the light transmitting material 13 is attached to both upper and lower surfaces of the side louvers.

[0055]

Since the present invention is configured as described above, it has the following effects.

According to the invention of claim 1, since the side louver is attached to the main body of the luminaire and is rotated, for example, in the office room or the like, depending on the work content, the work position, the mounting interval of the luminaire, etc. By rotating the lateral louvers and changing the illuminance distribution around the side of the lighting fixture and in the room, a comfortable working environment and visual environment can be realized.

According to the invention of claim 2, the two or more lateral louvers provided above and below the side of the main body of the lighting fixture are integrally rotated, so that the operation is easy, and there are two or more lateral louvers. Since the light is reflected in the direction of and the illuminance distribution around the side of the luminaire and in the room changes, a comfortable working environment and visual environment can be realized.

According to the third aspect of the invention, by independently rotating each of the two or more side louvers above and below the side of the main body of the luminaire, irradiation is performed around the side of the luminaire and toward the ceiling surface. The directivity of the emitted light can be widely changed.

According to the invention of claim 4, when any one of the side louvers is rotated up and down in the lighting fixture,
Since it is possible to completely block the irradiation of light to the side of the luminaire and the ceiling surface, when performing VDT work indoors, for example, it is possible to eliminate the reflection of light on the CRT screen.

According to the fifth aspect of the present invention, since any one of the side louvers has a mirror-finished surface on a part or the whole of the upper surface, the regular reflectance of the upper surface of the side louver can be increased. Light can be efficiently radiated to the side of the lighting equipment and to the ceiling surface direction.

According to the sixth aspect of the present invention, any one of the side louvers has a cross-sectional shape that is a concave curve with respect to the ceiling surface side of the lighting fixture body, so that the light reflected by the side louvers is Can be gathered in a certain direction laterally or upwardly, and light can be efficiently emitted to the peripheral side of the lighting fixture and the ceiling surface direction.

According to the invention of claim 7, any one of the side louvers has a length orthogonal to the longitudinal direction different from the other, so that the side louver can be rotated by rotating the side louver. The direction of the reflected light changes, and the illuminance distribution and the amount of the light radiated to the side of the lighting fixture and the direction of the ceiling surface can be changed. Furthermore, the unevenness of the brightness distribution on the ceiling surface can be reduced.

According to the invention of claim 8, the direction of the light reflected by the side louvers is changed by changing the distance between any one of the adjacent side louvers, and the direction of the side of the lighting fixture and the direction of the ceiling surface are changed. It is possible to change the illuminance distribution and the amount of light irradiating the.

According to the invention of claim 9, since the light transmitting material having a predetermined transmittance for adjusting the amount of transmitted light from the side is attached, the amount of light radiated to the periphery of the lighting fixture and the direction of the ceiling surface. Can be changed according to the purpose of use.

[Brief description of drawings]

FIG. 1 is a perspective view in which an upper portion of a lighting fixture according to a first embodiment of the present invention is omitted.

FIG. 2 is a cross-sectional view of the lighting fixture of FIG.

FIG. 3 is a cross-sectional view of a lighting fixture showing an example of a usage pattern according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional view of a lighting fixture showing an example of a usage pattern according to the first embodiment of the present invention.

5 is a measured light distribution curve in the usage pattern of FIG.

6 is a measured light distribution curve in the usage pattern of FIG.

7 is a measured light distribution curve in the usage pattern of FIG.

FIG. 8 is a perspective view of a lighting fixture according to a second embodiment of the present invention, omitting an upper portion thereof.

9 is a cross-sectional view of the lighting fixture of FIG.

FIG. 10 is a cross-sectional view of a lighting fixture showing an example of a usage pattern according to Embodiment 2 of the present invention.

FIG. 11 is an actually measured light distribution curve in the usage pattern of FIG.

FIG. 12 is a sectional view of a lighting device according to a third embodiment of the present invention.

FIG. 13 is a sectional view of a lighting device according to a fourth embodiment of the present invention.

FIG. 14 is a sectional view of a lighting device according to a fourth embodiment of the present invention.

FIG. 15 is a perspective view of a side louver of a lighting device according to a fifth embodiment of the present invention.

FIG. 16 is a cross-sectional view of a lighting fixture showing an example of the usage pattern according to Embodiment 5 of the present invention.

FIG. 17 is a perspective view of a side louver of a lighting device according to a sixth embodiment of the present invention.

FIG. 18 is a sectional view of a lighting device according to a seventh embodiment of the present invention.

19 is a perspective view of a side louver of the lighting fixture of FIG.

FIG. 20 is an external view of a conventional lighting fixture.

21 is a cross-sectional view of the lighting fixture of FIG. 20.

[Explanation of symbols]

 1 Lighting Fixture Main Body 2 Fluorescent Lamp 3 Electronic Ballast 4 Top Reflector 5 Horizontal Louver 6 Vertical Louver 7 V-shaped Reflective Frame Plate 8 Side Louver 9 Rotating Shaft 10 Frame Plate 11 Lower Louver 12 Shaft Guide 13 Light Transmission Material

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[Procedure amendment]

[Submission date] February 3, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0037

[Correction method] Change

[Correction content]

[0037]

[Table 2]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0051

[Correction method] Change

[Correction content]

Example 6. FIG. 17 is a perspective view from above of a side louver of a lighting fixture according to a sixth embodiment of the present invention. In FIG. 17, 8c, 8d, 9a and 9b are the same as those shown in FIG. Frame plates 10 are provided at both ends of the lighting fixture body 1 (not shown) in the longitudinal direction, and are attached to the lighting fixture body 1. The frame plate 10 is provided with a shaft guide portion 12 having a shape in which a downward vertical groove is continuous at both ends of a U-shaped groove for guiding the rotation shaft 9a. The side louvers 8c and 8d are attached to the frame plate 10 so as to be independently rotatable by rotating shafts 9a and 9b. Side louver 8
The position c of the rotating shaft 9a can be changed by changing the position of the rotating shaft 9a within the shaft guide portion 12 and the distance between the side louvers 8d. Therefore, according to the present embodiment, the side louvers 8c, 8c
The direction of the light reflected by the side louvers 8c and 8d can be changed by changing the interval of d and rotating.
Come, it can also be varied amount of light emitted laterally or upward.

Claims (9)

[Claims] 1. A luminaire main body having an illuminating lamp and a lighting device to be installed on a ceiling, frame plates provided at both longitudinal ends of the luminaire main body, and at least one side of the luminaire main body. A lateral louver provided to change the irradiation direction of light, and the lateral louver is rotatably attached to the frame plate by means of rotary shafts provided at both longitudinal ends of the lateral louver. Lighting equipment characterized by. 2. The two or more side louvers are provided on the upper and lower sides of the side of the main body of the lighting fixture, and are attached to the frame plate so as to rotate integrally with the rotating shaft. The lighting fixture according to item 1. 3. The two or more side louvers are provided on the upper and lower sides of the side of the lighting fixture body, and the frame plate is provided so that each of the side louvers can be independently rotated by a rotation shaft provided for each of the side louvers. The luminaire according to claim 1, wherein the luminaire is attached. 4. Any one of the side louvers has a length that reaches the ceiling side of the lighting fixture body by rotating. The luminaire according to item 1. 5. The luminaire according to claim 1, wherein any one of the side louvers has a top surface partially or entirely made of a mirror surface material. . 6. The cross section of any one of the side louvers has a concave curve with respect to the ceiling side of the lighting fixture body. The luminaire according to the item. 7. The side louvers are provided in two or more pieces above and below the side of the lighting fixture body, and one of the side louvers has a length orthogonal to the longitudinal direction different from the others. The lighting fixture according to claim 6. 8. The two or more side louvers are provided on the upper and lower sides of the side of the main body of the lighting fixture, and are attached to the frame plate so that a space between any one of the adjacent side louvers is variable. The lighting fixture according to any one of claims 3 to 7, wherein: 9. The side louver is provided with a light transmitting material having a predetermined transmittance for adjusting the amount of transmitted light from the side, and the side louver is attached to the side louver. 7. The lighting fixture according to any one of 7.