JPH07335018A - Luminaire - Google Patents

Abstract

PURPOSE:To eliminate the irregularity of a sucked exhaust gas amount for a luminaire. CONSTITUTION:The first reflecting plate 3 which has slits 4 opposed to lamps 1, 2 is arranged to cover the lamps 1, 2 and the second reflecting plates 5a, 5b are provided inside the side of the first reflecting plate 3 at a space to be overlaid in part to form one reflecting plate. In this way, the space of the first reflecting plate 3 to the second reflecting plates 5a, 5b is changeable with the pushing and bending operation of the side end of the reflecting plate 3 and a sucked exhaust gas amount is thus adjustable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting fixture which is mounted on a ceiling surface of a room or the like which adopts a ceiling chamber smoke exhaust system.

[0002]

2. Description of the Related Art For example, when constructing a ceiling for a rental room for an office, there have been many cases of a system ceiling. But,
Since it is necessary to reinforce the partitioning work at a later date, the number of cases in which a conventional ceiling is used and a lighting fixture, an outlet, etc. are systematically provided for the ceiling is increasing in recent years.
As the smoke exhaust slit in this case, a slit-shaped suction port is generally provided on the ceiling surface, or an opening is provided in the reflector of the lighting fixture.

[0003]

However, in the above-mentioned conventional lighting fixture, since the opening cannot be taken in area,
A separate suction port was provided to make up for the shortage. In addition, since the opening of the lighting fixture is merely an opening, the air volume cannot be adjusted, and the flue gas intake air volume varies. In addition, although lighting fixtures with slits are commercially available, none of them can secure an area for processing the amount of flue gas. Therefore,
An object of the present invention is to provide a lighting fixture that can eliminate variations in the amount of flue gas sucked in.

[0004]

In order to achieve the above-mentioned object, the present invention is directed to a lighting device mounted on a ceiling portion in contact with a smoke exhaust duct, the lighting device being disposed so as to cover the lamp and facing the lamp. A structure is provided that includes a first reflection plate having a slit formed in a portion to be formed, and a second reflection plate arranged inside the side portion of the first reflection plate with a predetermined gap. There is. In this case, the mounting angle of the edge portion of the first reflector or at least one of the second reflector is
The gap may be changed so that it can be changed. Further, the edge portion of the first reflector may be horizontally divided into a plurality of portions so that the gap between the reflectors can be partially changed.

[0005]

According to the above-mentioned means, the slit provided in the portion of the first reflecting plate facing the lamp functions so as to send the intake air from the room or the like into the smoke exhaust duct.
The double structure formed on the side portion or the peripheral portion of the reflection plate can adjust the amount of intake air by changing the gap in this portion. Therefore, it is possible to secure a required opening area for each lighting fixture while providing the smoke exhaust slit in the lighting fixture.

By changing the mounting angle of the first reflecting plate or the second reflecting plate, the gap between the two changes,
The required opening area can be obtained with a simple configuration. In the first reflecting plate, each of the horizontally divided edges can be changed in mounting angle arbitrarily, and the amount of flue gas in a specific region of the lighting fixture can be adjusted arbitrarily. it can.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a perspective view showing an embodiment of a lighting apparatus according to the present invention, FIG. 2 is a sectional view taken along the line II-II of the embodiment shown in FIG. 1, FIG. 3 is an enlarged view of a portion A in FIG. 2, and FIG. It is a perspective view showing other examples. As shown in FIGS. 1 and 2, two lamps (fluorescent lamps in this embodiment) 1, 2,
The first reflector 3 is arranged so as to cover the upper part of the lamp 1 and is slightly longer than the length of the lamps 1 and 2, and has a "U" -shaped cross section. Two slits 4 are provided at regular intervals in the lamp length direction at a portion of the first reflector 3 facing the lamps 1, 2. The slit 4 communicates with the smoke exhaust duct in the back of the ceiling, and its area is set to, for example, about 1% of the area covered by one lighting fixture. As a specific example, if there is one lighting fixture in a 3.2 m × 3.2 m module, the total slit area in this case is [3.2 m × 3.2 m × 1/100 (m
m ² )].

Further, on both inner sides of the first reflecting plate 3,
The second reflecting plates 5a, 5a are partially overlapped with each other.
b is provided. The second reflecting plates 5a and 5b each have a substantially "L" shape (or may be a flat plate), and the lower end surface thereof is fixed to the ceiling surface (inside the room or behind the ceiling). The second reflectors 5a and 5b are arranged so as to face the side portions of the lamps 1 and 2, and both ends thereof are fixed to side plates (not shown) together with the end portion of the first reflector plate 3.
The respective upper ends of the second reflectors 5a and 5b and the first reflector 3
A gap 6 is provided between them. The slit 4 communicates with the back of the ceiling, and smoke can be discharged through the slit 4. Thus, the reason for forming the slit 4 on the upper part of the lamps 1 and 2 is to hide it by the lamps 1 and 2 so that the back of the ceiling cannot be seen.

If the slit 4 is made large, the opening area for exhausting smoke can be made large, but conversely, the reflection effect that the reflecting plate should have is also reduced. Therefore, there is a limit in increasing the slit width, and it is difficult to obtain the required opening area only with the slit 4. Therefore, the gap 6 is formed by adopting a divided structure in which the side end portion of the first reflector 3 is partially doubled so that the opening area of the gap 6 can be increased.
Then, the side end portion 7 of the first reflector 3 has a variable wing structure,
The opening area can be changed.

In the case of the ceiling chamber smoke exhaust system, there is an imbalance in the air volume between the slit near the smoke exhaust duct and the slit apart. Therefore, as shown in FIG. 4, the side end portion 7 is divided into a plurality of parts (a vertical cut is made to form the side end portions 7a, 7b,
7c) to form a structure in which the air volume can be adjusted. As shown in FIG. 5, when the slits of the three lighting fixtures have the same area and the flow in the smoke exhaust duct is in the X direction in the figure, the intake air volumes A, B, and C in the slit 4 are A <
B <C. In order to set the air volume to A = B = C, for example, the angles of the side end portions 7a, 7b, and 7c may be individually changed to obtain the optimum air volume.

The side end portion 7 and the side end portions 7a, 7b, 7c are
It is formed by integral processing on the main body of the first reflection plate 3,
The gap 6 can be set arbitrarily by bending and plastically deforming this portion by hand. In addition, the side end portion 7 and the side end portions 7a, 7b, 7c and the main body portion of the first reflecting plate 3 may be separate bodies, and a hinge may be provided at the joint portion. Although the slit 4 has a groove-shaped opening in the above embodiment, the through-hole may be continuously formed in a straight line. Further, although the slit 4 is formed by being divided in the length direction, it may be one long slit. Further, in the above embodiment, an example using a straight tube type fluorescent lamp as the lamp is shown, but a circle type fluorescent lamp, a mercury lamp or the like may be used. In this case, it is necessary to design the shape of each reflection plate and slit according to the shape of the lamp.

For example, in the case of a circle type fluorescent lamp, as shown in FIG. 6, a dish-shaped first reflecting plate 8 whose peripheral portion is divided into a plurality of parts in the circumferential direction, and a top plate of the first reflecting plate 8 are provided. A plurality of slits 9 formed in a semi-circular shape in the portion, and an annular second reflector 10 arranged in a multiple shape inside the periphery of the reflector 8.
It can be configured with each of. Also in this case, the amount of flue gas can be adjusted by bending each piece of the peripheral portion inward or outward. Further, in the above embodiment, the angle of the side edge of the first reflecting plate 3 is varied to adjust the air volume, but conversely, the second reflecting plates 5a and 5b are used.
You may change the side. Alternatively, the first reflector 3 and the second reflector 3
It is also possible to change both of the reflection plates 5a and 5b.

[0013]

As described above, according to the present invention, in the lighting fixture mounted on the ceiling portion in contact with the smoke exhaust duct, the lighting fixture is provided so as to cover the lamp and the slit is provided at the portion facing the lamp. A first reflector,
Since the second reflector is arranged inside the side of the first reflector with a predetermined gap, it is necessary to provide the smoke exhaust slits in the lighting equipment. The opening area can be secured.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a lighting fixture according to the present invention.

2 is a sectional view taken along line II-II of the embodiment shown in FIG.

FIG. 3 is an enlarged view of a portion A in FIG.

FIG. 4 is a perspective view showing another embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a relationship of an intake air volume between a plurality of slits.

FIG. 6 is a perspective view showing another embodiment of the present invention.

[Explanation of symbols]

 1, 2 Lamp 3 First reflector 4 Slits 5a, 5b Second reflector 6 Gap 7 Side end 7a, 7b, 7c Side end

Claims (3)

[Claims] 1. A lighting fixture attached to a ceiling portion in contact with a smoke exhaust duct, comprising: a first reflector provided so as to cover the lamp and provided with a slit at a portion facing the lamp; A lighting device, comprising: a second reflection plate disposed inside a side portion of the first reflection plate with a predetermined gap. 2. The mounting angle of at least one of the edge portion of the first reflection plate and the second reflection plate is variable so that the gap is changed. lighting equipment. 3. The luminaire according to claim 2, wherein an edge portion of the first reflector is horizontally divided into a plurality of parts.