JP2003007119A - Luminaire for grid ceiling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost for a luminaire, to improve the strength of it, and to improve the efficiency and life of a ballast. SOLUTION: There are provided a main support member 2 which forms a square grid frame, and a luminaire 11 which is installed in a rectangular frame 4 which is, having the area twice the grid frame, formed at a part of the grid frame. The length of the luminaire is almost equal to a major side 4a of the rectangular frame. The width of the luminaire is almost half a miner side 4b of the rectangular frame. Both sides of the miner side of the luminaire are fixed to the miner side of the rectangular frame. The central part of the luminaire on both sides of the major side and the major side of the rectangular frame are fixed with an auxiliary support member 12.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a lighting fixture for a grid ceiling.

[0002]

2. Description of the Related Art A grid ceiling is a system ceiling in which a ceiling board (rock wool sound absorbing board, etc.) is incorporated in a grid-like frame (grid) made up of T-bars (supporting members having a substantially T-shaped cross section). Lighting equipment that can be installed on the T-bar on the grid ceiling is commercially available from.

FIG. 3 shows a conventional lighting fixture.
FIG. 3A is a view of the ceiling as seen from below, FIG. 3B is a schematic cross-sectional view of a lighting fixture, and FIG. 3C is a view for explaining the flow of an air conditioning letter. In FIG. 3 (A), the grid ceiling 1 is divided by a T bar 2 into a square lattice-shaped frame, and the lighting fixtures 3 are installed in two lattice-shaped frames (rectangular frames) 4. There is. As shown in FIG. 3 (B), in the lighting fixture 3, the fluorescent lamp 6 is arranged inside the reflecting plate 5, and the fluorescent lamp ballast 7 is installed below the upper surface of the reflecting plate 5, and below that. A ballast cover 8 is attached, an opening 9 for air-conditioning is provided on the upper surface of the reflection plate 6 located on both sides of the ballast cover 8, and a blind cover 10 is provided opposite to the opening 9.

[0004]

However, in the above-mentioned conventional commercially available lighting fixture, the louver type is standard from the viewpoint of glare prevention, and the cost increases accordingly. Although it is possible to remove the louver, it is not originally intended to be removed, and therefore there are many holes for attaching the louver in the internal reflection plate, which is not preferable in terms of design.

Further, when the air-conditioning resin is taken from the ceiling chamber, the lighting fixture needs an opening for the letter, but in the conventional method, since the slit is provided around the lighting fixture, the lighting fixture has a double structure, which causes an increase in cost. I have a problem.

Further, the conventional lighting fixture 3 has a problem that it is disadvantageous in strength because the fluorescent lamp ballast 7 is attached to the reflection plate 5.

Further, as shown by the arrow in FIG.
The air-conditioning tank has a problem that the temperature of the ballast rises because it flows from the side surface of the reflection plate 5 through the opening 9 and does not directly touch the fluorescent lamp ballast 7, and also from the viewpoint of designing. There is a problem that the blind cover 10 must be provided in the opening 9 for the letter.

The present invention solves the above-mentioned conventional problems, and aims at reducing the cost of a lighting fixture, improving the strength of the lighting fixture, and improving the efficiency and life of the ballast. An object is to provide a lighting fixture for a grid ceiling that can be used.

[0009]

To this end, in a lighting fixture for a grid ceiling according to claim 1 of the present invention, a main support member forming a square lattice-shaped frame and a part of the lattice-shaped frame are provided.
A luminaire having a rectangular frame having a size of two grid-shaped frames is formed and installed in the luminaire, and the length of the luminaire is almost equal to the long side of the rectangular frame, and the width of the luminaire is It is configured to be about half of the short side, both sides of the short side of the lighting fixture are fixed to the short sides of the rectangular frame, and the central portions on both sides of the long side of the lighting fixture and the long sides of the rectangular frame are fixed by auxiliary support members. According to a second aspect of the present invention, in the lighting apparatus according to the first aspect, the lighting device includes a housing-shaped reflection plate having an opening at a lower side, a fluorescent lamp mounted inside the reflection plate, and a reflection plate. A ballast cover mounted on the upper surface and a fluorescent lamp ballast disposed inside the ballast cover are provided, and the ballast cover is mounted on the upper surface of the reflection plate in the middle of both side surfaces thereof.
On both sides of the ballast cover, a plurality of air-conditioning air inlets are formed below the reflector, and a plurality of air-conditioning exhaust outlets are formed above the reflector. According to a third aspect of the present invention, in the first or second aspect, a fixing metal member fixed to both side surfaces of the reflection plate,
It is characterized by comprising a connecting fitting fixed to the fixing fitting, and fixing the auxiliary support member and the reflection plate by the connecting fitting.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a lighting fixture for a grid ceiling of the present invention, FIG. 1 (A) is a view of the ceiling from below, FIG. 1 (B) is a perspective view of the lighting fixture, and FIG.
FIG. 1C is a schematic cross-sectional view of FIG. 1B, and FIG. 1D is a diagram for explaining the flow of an air conditioning letter.

In FIG. 1A, the grid ceiling 1 is
The main support member 2 made of a T-bar (a long member having a substantially T-shaped cross section) divides the main support member 2 into a square lattice-shaped frame (grid). The main support member 2 is attached to the ceiling slab via a hanger with hanging bolts.

A ceiling board (rock wool sound absorbing board or the like) is incorporated in each lattice-like frame, and a rectangular frame 4 having a width of two lattice-like frames is formed in a part of the lattice-like frame. The lighting fixture 11 according to the present invention is installed therein. Lighting equipment 1
The length of 1 is almost equal to the long side 4a of the rectangular frame 4, and the width of the lighting fixture 11 is about half of the short side 4b of the rectangular frame 4. As a result, the size can be reduced and the cost can be reduced as compared with the conventional lighting fixture.

Then, both short sides of the lighting fixture 11 are supported and fixed to the short sides 4b of the rectangular frame 4, and both long sides of the lighting fixture 11 are supported and fixed to the auxiliary support member 12 composed of a T-bar at the center thereof. Has been done. The periphery of the luminaire 11 of the rectangular frame 4 is closed by a ceiling board such as a rock wool sound absorbing board or a steel panel.

The luminaire 11 is shown in FIGS.
As shown in (C), a housing-shaped reflector 5 having an opening at the bottom, two fluorescent lamps 6 mounted inside the reflector 5, and a ballast mounted on the upper surface 5 a of the reflector 5. A cover 13 and a fluorescent lamp ballast 7 disposed inside the ballast cover 13 are provided. A looper may be attached to the opening of the reflection plate 5.

The ballast cover 13 is made up of a box having a substantially pentagonal cross-section, and its apex faces downward and is attached to the upper surface 5a of the reflector 5 at the middle of both side surfaces 13a of the ballast cover 13. With this structure, the strength of the reflection plate 5 can be improved, and the distance between the rear surface of the lamp and the reflection plate can be increased to improve the illumination efficiency.

On both side surfaces 13a of the ballast cover 13, a plurality of air conditioning inlets 14 for air conditioning are formed below the reflector 5, and a plurality of air outlets 15 for air conditioning are disposed above the reflector 5. Further, a plurality of air outlets 16 for air conditioning is also formed on the upper surface 13b of the ballast cover 13. In the center of both side surfaces 5b of the reflector plate 5, as shown in FIG.
The fixing metal fitting 17 for fixing the auxiliary support member 12 described in (A) is fixed.

In the luminaire 11 having the above-mentioned structure, as shown in FIG.
Flows from below to the inside of the ballast cover 13 through the intake port 14 and is exhausted through the exhaust ports 15 and 16, so that the temperature rise of the fluorescent light ballast 7 is prevented and the life of the fluorescent light ballast 7 is extended. It can be postponed. In addition, the intake port 14 and the exhaust port 15,
16 is difficult to see from below, and the conventional blindfold cover 1
0 becomes unnecessary.

Next, a method of connecting the lighting fixture 11 and the auxiliary support member 12 will be described with reference to FIG. The fixing member 17 fixed to the side surface 5b of the reflection plate 5 includes a fixing portion 17a fixed to the side surface 5b and an engaging portion 17b in which a gap is formed between the fixing portion 17a and the side surface 5b. And a cutout portion 17c formed above the engagement portion 17b, and a bending piece 17d formed in the cutout portion 17c so as to be bendable in the engagement portion 17b.

The auxiliary support member 12 has an upper bulge 12a.
The intermediate vertical portion 12b and the lower horizontal portion 12c are integrally molded, and a connecting fitting 19 for connecting the auxiliary support member 12 to the fixing fitting 17 is prepared.

The connecting fitting 19 has a fitting portion 19a fitted to the bulging portion 12a of the auxiliary support member 12, a wide portion 19b extending from the fitting portion 19a so as to widen, and a wide portion 19b. And an engaging piece 19c extending downward from the tip of the.

Then, as shown in FIGS. 2 (A) and 2 (B), the fitting portion 19a of the connecting fitting 19 is fitted into the bulging portion 12a of the auxiliary supporting member 12, and the engaging piece 19 is also provided.
After inserting c into the engaging portion 17b of the fixing metal fitting 17, as shown in FIG.
As shown in (C), the side surface of the wide portion 19b is deformed by pliers or the like to tightly connect the fixing metal fitting 17 and the auxiliary support member 12, and further, the bending piece 17d is bent toward the front side and projected to the auxiliary support member 12. It is applied to prevent the coupling fitting 19 from coming off. Further, the fitting portion 19a and the bulging portion 12a are fixed by the tapping screw 20 as needed.

With the above connecting structure, the luminaire 11 is
The lighting device 1 is supported by the main support member 2 on its short side.
By supporting the auxiliary support member 12 and the ceiling plate with one body, it is possible to secure the strength required for the grid ceiling.

[0023]

As is apparent from the above description, according to the present invention, it is possible to reduce the cost of a lighting fixture, improve the strength of the lighting fixture, and improve the efficiency and life of the ballast. You can

[Brief description of drawings]

1 shows an embodiment of a lighting fixture for a grid ceiling of the present invention, FIG. 1 (A) is a view of the ceiling from below, FIG. 1 (B)
1A is a perspective view of a lighting fixture, FIG. 1C is a schematic cross-sectional view of FIG. 1B, and FIG. 1D is a diagram for explaining a flow of an air conditioning letter.

FIG. 2 is a diagram for explaining a method of connecting the lighting fixture and the auxiliary support member in FIG.

FIG. 3 shows a conventional lighting fixture, FIG. 3 (A) is a view of the ceiling from below, FIG. 3 (B) is a schematic cross-sectional view of the lighting fixture, and FIG. It is a figure for explaining.

[Explanation of symbols]

1 ... Grid ceiling 2 ... Main support member 4 ... Rectangular frame 5 ... Reflector 6 ... Fluorescent lamp 7. Fluorescent lamp ballast 12 ... Auxiliary support member 13 ... Ballast cover 14 ... Intake port 15, 16 ... Exhaust port 17 ... Fixing bracket 19 ... Connecting bracket

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Katsuhide Saito             2-18-2 Kyobashi, Chuo-ku, Tokyo Stock market             Within Milx (72) Inventor Hiromi Misawa             7-2-47 Kamihigashi, Hirano-ku, Osaka City, Osaka Prefecture             Ceremony company Endo Lighting (72) Inventor Takashi Fukumura             Shimizu Construction 1-3-2 Shibaura, Minato-ku, Tokyo             Within the corporation (72) Inventor Tsuyoshi Ishihara             Shimizu Construction 1-3-2 Shibaura, Minato-ku, Tokyo             Within the corporation F term (reference) 3K014 AA02 EA01 EA04 LA04 LB03

Claims (3)

[Claims] 1. A main supporting member forming a square lattice-shaped frame, and a rectangular frame having a width of two lattice-shaped frames is formed in a part of the lattice-shaped frame and is installed therein. The length of the luminaire and the luminaire are almost equal to the long side of the rectangular frame, the width of the luminaire is configured to be about half the short side of the rectangular frame, and the short sides of the luminaire are fixed to the short sides of the rectangular frame. The lighting fixture for a grid ceiling is characterized in that the central portions on both long sides of the lighting fixture and the long sides of the rectangular frame are fixed by an auxiliary support member. 2. The lighting apparatus comprises a housing-shaped reflector having an opening at the bottom, a fluorescent lamp mounted inside the reflector, a ballast cover mounted on the upper surface of the reflector, and a ballast cover. And a fluorescent lamp ballast arranged inside the
The ballast cover is attached to the upper surface of the reflector plate in the middle of both sides of the ballast cover. On both side faces of the ballast cover, a plurality of air-conditioning air inlets are formed below the reflector plate and above the reflector plate. The lighting fixture for a grid ceiling according to claim 1, wherein a plurality of air-conditioning exhaust openings are formed in the air conditioner. 3. A reflector is provided with fixing metal fittings fixed to both side surfaces of the reflection plate and a connecting metal fitting fixed to the fixing metal fitting, and the auxiliary metal support and the reflecting plate are fixed by the connecting metal fittings. The lighting fixture for a grid ceiling according to Item 1 or 2.