JPS6019291Y2 - lighting equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a lighting device installed in a line on the system ceiling.

Conventional lighting devices of this type generally have a pair of T-bars that support a ceiling board, which are fixed in parallel so that they intersect at right angles to the ceiling base bar and are spaced apart from each other at an appropriate distance. The lighting device main body is placed on the top of a pair of T-pars via a main body mounting rack whose center portion is attached to the bottom surface of the device main body so as to be perpendicular to both ends of the device main body, and
A gutter-shaped reflector was placed on a hook-shaped receiver on the lower side of the T-bar with its concave surface facing downward, and a fluorescent lamp was placed in the concave portion of the reflector.

However, with this structure, the main body of the device is located above the T-bar, and the ceiling base bar to which the T-bar is attached must be configured to avoid this. Specifically, the T-bar must be suspended. This resulted in the disadvantage that the ceiling dimensions had to be increased, such as by using a structure in which the device was suspended through metal fittings.

The present invention improves these conventional drawbacks,
Install the device body mounting racks at both ends of the device body, avoiding the ceiling base bar, and attach the back side of the device body opposite to the ballast side to the T to be installed on the device body mounting rack.
The object of the present invention is to provide a system ceiling lighting device that is located below the bar and does not affect the ceiling dimensions.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Reference numeral 1 denotes a ceiling base bar, and 2 and 2' designate tops 21 and 21' on the lower surface of the ceiling base bar 1 so as to face each other in parallel at intervals.
3 is a device body with a shallow downward gutter shape, 4 is a stabilizer housed in the gutter-like part of the device body, 5 is a fixed T-bar.
are main body mounting racks installed near both ends of the device main body 3 at positions perpendicular to the longitudinal direction of the main body 3 and avoiding the ceiling base bar 1, and the suspension points 53, It is suspended from the top part 21° 21' of the T-bar via 53', and this suspension point 53, 53'
It is configured to be located at a height of 1 or more.

That is, the main body mounting rack 5 is provided with a main body mounting part 51 projecting downward in the center, and the back surface 31 of the apparatus main body 3 is attached to the top part 21.21' of the T-bar 2, 2'.
It is designed not to exceed.

Further, an end portion 52 extending outward from one suspension portion 53 has an inclined portion 54 that slopes upward.

Reference numeral 6 denotes a reflector, whose both ends 61 and 61' are placed on the hook-shaped receivers 22 and 22' facing inwardly on the lower side of the T-bar, and the central part is attached to the stabilizer 4 downwardly and laterally. It has a V-shaped part 62 that protrudes downward in a surrounding manner, and recesses 63, 63' are formed between the ■-shaped part 62 and both side edges in a range that does not exceed the top part 21.21' of the T-bar. Fluorescent lamp 7.7'
is the lamp socket 8 attached to the lower surface 55 of the main body mounting rack.
, 8' are arranged in this recess 63, 63'.

As explained above, the present invention provides a device body mounting rack in a location near both ends of the device body that avoids the ceiling base bars, and the device body mounted on this mounting rack has its back side facing the top of the T-bar. It is located further down.

As described above, in the lighting device according to the present invention, since the back of the main body of the device is held in a position that does not exceed the top of the T-bar, the ceiling base bar supporting the T-bar is attached to the T-bar in the range excluding the main body mounting rack. It becomes possible to connect directly, and as a result, there is no need to increase the size of the ceiling pocket for the lighting device.

Therefore, the structure of the system ceiling is simplified and can be constructed without extra cost.

Note that even if there is almost no difference in height between the back surface 31 of the lighting device main body and the suspended portion 53, 53' of the main body mounting rack, the lower end 52 of one end of the main body mounting rack is located at
If the position is higher than 53', the other end 52' of the main body mounting frame is first suspended on the T-bar top 21', and then the lower end 52 of one end is suspended, as shown in Fig. 4. By performing the work, the slope 54 acts as a guide and the work can be easily performed.

In addition, in the above embodiment, in order to simplify the explanation, the two bars to which the lighting device is attached are illustrated as T bars, but the invention is not limited to this. Needless to say, it is sufficient if the two bars are the same.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing a conventional lighting device, Fig. 2 is a cross-sectional view of a lighting device showing an embodiment of the present invention, and Fig. 3 is a cross-sectional view showing a conventional lighting device.
FIG. 4 is a bottom view of the illumination device shown in the figure, with the fluorescent lamp and reflector removed, and FIG. 4 is a cross-sectional view showing the illumination device of the present invention during installation work. In the figure, 1 is the ceiling base bar, 2 is the T-bar, 3 is the device body, 5
21.21' is the top part, 31 is the back part. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (2)

[Scope of utility model registration request] (1) A pair of bars that support the ceiling board are fixed in parallel so that they intersect with the ceiling base bar and have an appropriate distance from each other, and the main body of the device is mounted on the top of the pair of bars. In a lighting device equipped with a main body mounting rack, a ballast is attached to the bottom surface of the device main body, and the device main body is installed on the main body mounting rack so that the back side of the device is below the top of the bar. A lighting device characterized by: (2) The lighting device according to claim 1, wherein at least one end of the main body mounting frame is inclined upwardly from the outside of the suspension portion.