JPH02288103A - lighting equipment - Google Patents

Abstract

PURPOSE:To reduce unevenness of illuminance in a lighting equipment provided with a lighting body in one corner of a rectangular module by disposing the longitudinal direction of a lamp housed in the lighting body perpendicular to a diagonal line passing through the corner. CONSTITUTION:A rectangular frame (module) 40 is formed of T bars 1 and the like. A lighting body 11 for housing a lamp 9 is disposed in one corner of the frame 40. The longitudinal direction of the lamp 9 is perpendicular to a diagonal line C passing through the corner. An angle alpha measured with respect to the lamp 9 in the corner A opposed to the lamp 9 is larger than an angle betameasured with respect to the lamp 9 in the other corner B. Accordingly, illuminance in the corner A can be compensated irrespective of a longer distance from the lamp 9, thus reducing unevenness of illuminance. Therefore, deteriora tion of illuminance at a position farthest from the lamp 9 can be limited so that unevenness of illuminance on the whole surface of a ceiling can be reduced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a ceiling-mounted lighting device, and particularly to a lighting device that is suitable for installation on a system ceiling and consists of a ceiling support frame arranged in a grid pattern. It is related to.

[Prior Art] Ceiling-hanging lighting fixtures have conventionally been used as lighting devices attached to the ceiling surfaces of stores, theaters, halls, offices, and the like. This ceiling-suspended lighting fixture has a configuration in which the lamp body, which is the main body of the lighting device, is attached to a support frame member in the ceiling using a hanging vibrator or a hanging bolt provided on the back of the lamp body.

Also, conventionally, the ceiling panel on the back of the light body was placed inside (above) the ceiling surface.
It had a moat structure embedded in the ceiling, and a part of the light from the top of the lamp was reflected by the raised ceiling board, and the room was illuminated with direct light from the bottom of the lamp.

On the other hand, in recent years, systems have been developed in which H-bar bars made of H-shaped aluminum or T-shaped aluminum are installed on the ceiling, and various equipment such as lighting equipment, sprinklers, and ceiling panels are installed along these H-bars and T-bars. The ceiling is developed. In such a system ceiling, ceiling support members such as T-bars are arranged in a lattice shape along the ceiling surface, and one lattice is configured as a unit module of one lighting device, and each unit module has one light. The body is arranged.

[Problems to be Solved by the Invention] When incorporating the conventional half-light fixture into a system ceiling structure, since it is a ceiling hanging structure, the H
In addition to the ceiling frame such as a T-bar, a reinforcing channel member, etc. must be provided, and a hanging bolt must be fixedly supported on this channel member, and another member must be provided to support the ceiling board, resulting in a structure that is The work became complicated and the installation of the equipment was troublesome. In addition, structural members such as hanging bolts on the back of the frame place restrictions on the arrangement and shape of the sunken ceiling plate on the back of the light body, which serves as a reflection means, and it is difficult to obtain the desired light distribution characteristics according to the position and shape of the light body. There was a problem in that the illuminance was uneven due to the lack of brightness.

In order to solve this problem, the present inventors installed a frame upright on the T-bar that constitutes the rectangular module of the system ceiling, and attached respective holding means for the light body and the ceiling plate to the frame. We propose a lighting device structure that is installed through the

In such a rectangular module structure, the modules are designed to have an asymmetric structure, taking into account the number of modules, the width of the ceiling surface, design processing, etc., and by changing the direction of the modules and combining multiple modules, it is possible to achieve the same optical performance as another module. There are cases where the configuration is effective. In such a case, the lamp body is arranged at the corner of the module.

However, if the lamp housing the lamp is installed in a corner of the module rather than in the center, the distance from the corner where the lamp is installed to the diagonally opposite corner becomes longer.
There was a problem in that the partition on the opposite side facing the lamp became dark, resulting in uneven illuminance.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and it improves the workability of semi-indirect lighting fixtures applied to system ceiling structures, and also improves the workability of semi-indirect lighting fixtures that are applied to system ceiling structures. The purpose of the present invention is to provide a lighting device that reduces uneven illuminance.

[Means for Solving the Problems] In order to achieve the above object, a lighting device according to the present invention includes a rectangular frame formed substantially on the same plane as a ceiling surface, and a rectangular frame provided at one corner of the rectangular frame. The rectangular frame has a lamp body that accommodates a lamp, and a dug-out ceiling plate that is embedded into the inner surface of the ceiling from the ceiling surface, and the rectangular frame passes through the corner in the longitudinal direction of the lamp inside the lamp body. It is placed perpendicular to the diagonal of the body.

[Operation] FIG. 1 is an explanatory diagram of the principle of the present invention. A rectangular frame (module) 40 is formed by the T-bar 1 and the like. A lamp body 11 housing a lamp 9 is provided at one corner of this rectangular frame body 40. The longitudinal direction of the lamp 9 is arranged perpendicular to the diagonal line C passing through this corner.

In such a configuration, the angle α at which the lamp 9 is viewed from the corner A on the side facing the lamp 9 is larger than the angle β at which the lamp 9 is viewed from the other corner B.

Therefore, even though the corner A is far from the lamp 9, the brightness is compensated and uneven illuminance is reduced.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is an exploded perspective view of the lighting device according to the present invention. T-bar 1a constitutes the system ceiling.

A rectangular frame is formed by 1b. T bar 1a.

The rectangular frame 2 stands upright on a pair of opposing T-bars 1a of the rectangular frame. (perpendicular to the rectangular frame consisting of T-bars la and lb). As a method of fixing this frame 2, for example, as shown in FIG.
For installation by sandwiching the web material, the metal fittings 4 are fixed by appropriate means. A support plate 3 is fixed along the lower edge of the frame 2. To attach the support plate 3 and the T-bar side, the metal fittings 4 are fixed to each other with screws 5.

Connect the upper azusa materials of the two opposing frames 2 and
Two crossbars 7 made of molded aluminum are provided. A lamp body 11 holding a lamp 9 is disposed below between these crosspars 7. The lamp body 11 has a semi-indirect lighting structure, and the casing 8 in which the lamp 9 is attached has an open top and a light looper on the bottom that allows the light from the lamp 9 to pass through and directly illuminates the room with the light from the lamp 9. 10 is installed. This lamp body 11 is attached to a corner of a rectangular module consisting of T-bars 1a and lb. A hole 12 for attachment is provided on the side surface of the box body 8 of the lamp body 11. For mounting the light body on the module side, a hole 13 is provided at the corner that matches the hole 12 on the light body side. The hole 13 on the module side is formed in the support plate 3 at the lower edge of the frame 2. An L-shaped bar, which will be described later, may be fixed on the T-bar 1b, and the hole 13 for attaching the lamp body may be provided in this L-shaped bar. The lamp body 11 is fixed to the corner of the module by means of screws or the like via both holes 12,13. 14 is a stabilizer.

The lamp 9 is provided at right angles to a diagonal line passing through the corner of the rectangular module on the side where the lamp body 11 is fixed.

A ceiling plate made of rock wool or the like is attached to the top side of the rectangular module made up of the T-bars 1a and lb so as to cover the side and top surfaces of the light body 11.

The upper surface of the light body 11 is covered with a ceiling plate 16, and almost the entire surface of the module is covered with two inclined ceiling plates 17 (only one is shown). A reflective ceiling plate (not shown) is also attached to the vertical side surfaces of the module (the crossbar 7 portion at the end and the frame 2 portion on the front side). 2 sloping ceiling panels 1
7 is divided along the diagonal of the module. Ceiling board 1
The slope 7 is inclined downward as it moves away from the upper surface of the lamp body 11.

It is desirable that each T-bar be provided with a rectangular bar 25 for receiving the ceiling plate.The L-shaped bar 25 can be fixed by sandwiching the web material of the T-bar 1, for example, as shown in FIG. A metal fitting 6 is used for mounting similar to that shown in FIG. In this installation, the metal fitting 6 and the L-shaped bar 25 are
6. They are fixed to each other by 6. The bent part of the L-shaped bar 25 is T
The lower edge of the inclined ceiling plate 17 and the vertical ceiling (not shown) are mounted and held on this part that protrudes longer than the bar. Slits, holding metal fittings, etc. for fixing and holding each ceiling board are provided in each frame material and par material as necessary.

The shape of the lamp 9 is not limited to one, but may be two or four as shown in FIGS. Applicable.

[Effects of the Invention] As explained above, in the lighting device according to the present invention, in a configuration in which the lamp body is provided at the corner of the rectangular frame, the lamp inside the lamp is provided in the corner of the rectangular frame. In this configuration, since the lamp inside the lamp body is arranged at right angles to the diagonal line of the rectangular frame, the maximum illumination direction of the lamp light distribution characteristic coincides with the direction of the opposite corner at the farthest position from the lamp. Therefore, the decrease in illuminance at the farthest position from the lamp is suppressed, and the unevenness of illuminance on the entire ceiling surface is reduced.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the principle of the present invention, Fig. 2 is an exploded perspective view of the lighting device according to the invention, Fig. 3 is a detailed sectional view of the frame fixing part of the lighting device according to the invention, and Fig. 4 is Detailed sectional view of the L-shaped bar fixing part of the lighting device according to the present invention, FIG. 5(a)
, (b) are explanatory diagrams each showing the shape of a lamp according to the present invention. Figure 1 1a, lb: T-bar 2 = Frame, 4.6: Mounting metal fittings, 7: Cross bar 9 = Lamp,
11: Light body, 16.17: Ceiling board, 40: Module. (a) (b) Figure 5

Claims (1)

[Claims] A rectangular frame formed substantially on the same plane as the ceiling surface, a lamp body installed at one corner of the rectangular frame body for accommodating a lamp, and a lamp body installed embedded in the inner surface of the ceiling from the ceiling surface. 1. A lighting device comprising a sunken ceiling plate, wherein the longitudinal direction of the lamp inside the frame is arranged at right angles to a diagonal line of the rectangular frame passing through the corner.