JP3806963B2 - lighting equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lighting fixture.
[0002]
[Prior art]
FIG. 5 shows a conventional lighting fixture (first conventional example). This lighting fixture is a lighting fixture that is directly attached to the ceiling, and is an elongated light source 2 inside the fixture body 1. A tubular fluorescent lamp 2a is accommodated.
[0003]
The instrument main body 1 includes a main body portion 1a and a frame-like body portion 1b that is mounted so as to accommodate the main body portion 1a, and is formed in an elongated, substantially box shape. The main body 1a includes a reflecting surface 1c having a substantially V-shaped cross section for reflecting light downward, and a mounting portion 1d to the ceiling. The main body 1a is attached to the lower surface of the ceiling with the reflecting surface 1c facing downward, and the reflecting surface 1c. Are respectively provided with sockets (not shown) so that the straight tube fluorescent lamps 2a can be mounted in parallel and facing the reflecting surface 1c. Further, the frame-like body portion 1b has a rectangular frame shape opened up and down. The main body portion 1a is inserted into the upper opening from the reflective surface 1c side, and the frame-like body portion 1b is attached to the socket. It is attached to the main body 1a so as to substantially cover the side of the main body 1a together with the straight tube fluorescent lamp 2a. And in the cross section perpendicular | vertical to the elongate direction of the instrument main body 1, between the both sides of the main-body part 1a and the edge part of the upper opening of the frame-shaped body part 1b, it is the straight tube | pipe fluorescent lamp 2a from the upper ceiling surface side. Is formed as an upper light projecting opening 1e that emits light in the direction of the ceiling surface, and is an opening below the instrument body 1 and below the frame-like body 1b. Is a lower light projecting opening 1 f that irradiates the floor surface with light.
[0004]
In the lighting fixture configured as described above, light from the straight tube fluorescent lamp 2a that is the light source 2 is mainly emitted from the lower light projecting opening 1f to the floor surface side to irradiate the floor surface side. The portion is also emitted from the upper light projecting opening 1e to the upper ceiling surface side so as to illuminate the ceiling surface brightly and give a feeling of spreading to the indoor space.
[0005]
6 and 7 show another conventional lighting fixture (second conventional example). The difference from the first conventional example is that the lighting fixture is a mountain-shaped ceiling plate as shown in FIG. 3 is mounted on the T-bar 4 of the system ceiling, and the upper side of the frame-like body portion 1b is greatly opened to increase the area of the upper light projecting opening portion 1e, and from the straight tube fluorescent lamp 2a. Direct light and reflected light on the reflecting surface 1c of the main body 1a are emitted more to the side of the ceiling surface on the side of the instrument body 1, and the shape of the reflecting surface 1c is formed into a curved surface, and The louver 5 is provided in the lower light projecting opening 1f so as to be supported by the lower end of the side wall 1g of the frame-like body portion 1b that forms the end of the lower light projecting opening 1f. The configuration is almost the same as the example.
[0006]
[Problems to be solved by the invention]
However, in the lighting fixture shown in the first conventional example configured as described above, the light emitted from the upper light projecting opening 1e is mainly direct light from the straight tube fluorescent lamp 2a. Although the ceiling surface close to the main body 1 becomes bright because the distance from the light source 2 is short, the ceiling surface away from the instrument main body 1 becomes dark, and the ceiling surface in the vicinity of the instrument main body 1 becomes too bright on the entire ceiling surface. There was a problem that brightness unevenness occurred on the ceiling surface and it was unsightly.
[0007]
Further, in the lighting fixture shown in the second conventional example, a large amount of light is emitted from the upper light projecting opening 1e of the fixture body 1 to the side of the fixture body 1 and toward the ceiling surface side. As in the conventional example, the ceiling 6 surface in the vicinity of the fixture body 1 is too bright, and the luminance unevenness occurs on the ceiling surface, which is unsightly, or the installation interval (mounting pitch) of the lighting fixture is changed. However, there is a problem that uneven brightness is unavoidably generated on the ceiling surface.
[0008]
The present invention has been made in view of the above problems, and its object is to provide a lighting fixture that reduces uneven brightness on the ceiling surface and does not cause unsightly appearance, and has another object. However, an object of the present invention is to provide a lighting fixture that does not cause uneven brightness on the ceiling even if the mounting pitch of the lighting fixture is changed.
[0009]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a device main body 1 in which a plurality of elongated light sources 2 are separated from each other and stored substantially in parallel. A suspension 7 suspended from the lower surface of the ceiling 6, and provided with an upper light projecting opening 1 e for irradiating light on the ceiling 6 side on the upper surface of the instrument body 1 and irradiating the lower surface with light on the floor surface side. In a lighting fixture that is provided with a lower projection opening 1f to be attached to the ceiling 6 with a predetermined mounting interval, the light source 2 is located closer to the center of the fixture body 1 than the light source 2 of the upper projection opening 1e. The light emitted from the light is reflected obliquely above the fixture body 1 and the beam center of the light emitted from the upper light projecting opening 1e is reflected toward the substantially central ceiling 6 surface of the fixture to which the fixture is attached. The board 8 is provided.
[0010]
Is a further claim 1 the invention described, the pre-Symbol reflector 8, it is characterized in that it has rotatably formed about a axis substantially parallel with the lamp axis of the elongated light source 2.
[0011]
Is a further to the first aspect of the invention, before SL on the upper surface of the lower light-projecting opening 1f, control the light upper end is released from the lower light-projecting opening 1f positioned on the side of the light source 2 those with the louvers 5 are provided, the upper end of the side wall 1g forming the ends of the upper light-projecting opening 1e of the instrument body 1, characterized in that is extended so as to contact with the upper end of the louver 5 It is.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a first embodiment of a lighting fixture of the present invention. This lighting fixture is a lighting fixture suspended from the lower surface of a ceiling 6, and mainly includes a fixture main body 1, The louver 5, the hanging tool 7, and the reflection plate 8 are included.
[0013]
The instrument main body 1 is made of a steel plate, for example, the lower surface side is painted white, and a lower light projecting opening 1 f that emits light to the lower floor surface side is provided on the lower surface, and is formed in a long and substantially box shape. Has been. Then, sockets (not shown) for mounting the light source 2 are disposed at both ends in the longitudinal direction, and two straight tube fluorescent lamps 2a, which are the long light sources 2, are disposed inside the instrument body 1. Are housed so as to be spaced apart from each other substantially in parallel with the center line of the instrument body 1 therebetween. In addition, two upper light projecting openings 1e for irradiating light to the ceiling 6 side along the longitudinal direction are formed on the upper surface of the instrument body 1 on both sides in the cross section perpendicular to the longitudinal direction. Yes. The upper light projecting opening 1e is formed in the cross section perpendicular to the longitudinal direction of the instrument body 1 on both sides of the attachment part 1d at the center of the upper surface of the instrument body 1 to which the hanging tool 7 for attachment to the ceiling 6 is attached. Furthermore, it is formed so as to reach the side wall 1g of the instrument body 1 and to cut out the upper end of the side wall 1g. The two straight tube fluorescent lamps 2a, which are elongated light sources 2, are positioned inside the instrument body 1 and below the two upper openings 1e.
[0014]
The louver 5 is open at the top and bottom, and the side wall 1g that forms the peripheral end of the lower light projecting opening 1f of the instrument body 1 so that the straight tube fluorescent lamp 2a is positioned inside and near the upper end. The inner surface side has a high reflectivity, for example, is mirror-finished so as to control the light emitted from the lower light projecting opening 1f to the floor surface side. Further, the upper end of the louver 5 on the side wall 1g side of the instrument body 1 is the upper end of the side wall 1g of the instrument body 1, which is the outer end of the upper light projecting opening 1e, and the center of the straight tube fluorescent lamp 2a. The light emitted from the lower half of the straight tube fluorescent lamp 2a is efficiently guided to the lower light projecting opening 1f.
[0015]
The lifting tool 7 has one end attached to the mounting portion 1d on the upper side of the instrument body 1 and suspends the instrument body 1 from the lower surface by a predetermined distance downward from the lower surface thereof. Two suspensions 7 are used to suspend the main body 1. A plurality of lighting fixtures are attached to the ceiling 6 at a predetermined interval (attachment pitch) P.
[0016]
The reflecting plate 8 is provided with an upper end protruding from the upper light projecting opening 1e on the mounting part 1d side, which is the center side of the tool main body 1, from the light source 2 of the upper light projecting opening 1e of the tool main body 1. With the luminaire mounted on the ceiling 6 with a spacing (mounting pitch) P, the light emitted from the straight tube fluorescent lamp 2a as the light source 2 is reflected obliquely upward and emitted from the upper light projecting opening 1e. The center of the light beam is directed to the surface of the ceiling 6 that is approximately P / 2 away from the fixture body 1 that is approximately the center of the adjacent lighting fixture. Further, the reflecting plate 8 is, for example, mirror-finished so that at least the side on which the light source 2 is disposed has high reflectivity, and the upper end thereof is directly from the center of attachment of the suspension 7 to the ceiling 6 to the light source 2. The tube fluorescent lamp 2a is positioned substantially on the tangent to the tube wall on the side wall 1g side of the instrument body 1 so that the light from one light source 2 side is located above the other light source 2 across the center of the instrument body 1 The light is shielded so as not to reach the ceiling 6 surface side. Further, the lower end of the reflecting plate 8 is provided so as to substantially contact the upper end of the louver 5 on the center side of the instrument body 1. Therefore, the light emitted from the upper half of the straight tube fluorescent lamp 2a which is the light source 2 is efficiently guided to the ceiling 6 side obliquely above the instrument body 1 directly or via the reflector 8.
[0017]
Since it is configured in this manner, in the lighting fixture according to the present embodiment, the upper light is projected on the ceiling 6 surface that is located at the approximate center of the mounting pitch P of the lighting fixture and is farthest from the fixture body 1. The beam center of the light emitted from the opening 1e is directed, and this portion is illuminated by the lighting fixtures on both sides, and becomes brighter, and the ceiling 6 surface on the side closer thereto is brighter because the distance from the light source 2 is shorter. Illuminated. Further, since the light from one light source 2 side is shielded by the reflector 8 so as not to reach the ceiling 6 surface side above the other light source 2 across the center of the instrument body 1, It is alleviated that the surface of the ceiling 6 near the top is too bright. For this reason, the ceiling 6 surface has a more uniform illuminance, and the luminance unevenness is reduced and the appearance is improved. Further, although both the floor surface side and the ceiling 6 surface side can be illuminated by one light source 2, not only direct light emitted directly from the light source 2 to the outside of the instrument body 1, but also louvers. 5 is substantially in the same plane as the center line of the light source 2, the light emitted from the lower side is reflected by the louver 5 and efficiently guided to the lower light projecting opening 1 f side. Since the lower end and the upper end of the louver 5 are substantially in contact with each other, the light on the upper side is similarly efficiently guided to the upper side of the instrument body 1 by the reflecting plate 8, and the instrument efficiency is not lowered.
[0018]
FIG. 2 shows a second embodiment of the luminaire of the present invention. The difference from the first embodiment is that the reflector 8 is an axis substantially parallel to the lamp axis of the elongated light source 2. The other configuration is substantially the same as that of the first embodiment.
[0019]
That is, side plates 8a are provided at both ends of the reflecting plate 8 in the longitudinal direction, and the side plates 8a are provided with arc-shaped slits 8b, and the reflecting plate 8 includes the lamp shaft using the slits 8b as a guide. It is designed to be rotatable about an axis substantially parallel to the lamp axis.
[0020]
Even if configured in this manner, the same effect as in the first embodiment can be obtained, and by rotating the reflecting plate 8, the direction of the beam center of the light emitted from the upper light projecting opening 1e can be changed. Since it can be changed, even if the mounting pitch P of the luminaire is different, by rotating the reflector 8 and changing the direction of the beam center of the light emitted from the upper light projecting opening 1e, Even if the luminance unevenness on the ceiling 6 surface can be reduced and the mounting pitch of the lighting fixture is changed after the construction, the luminance unevenness on the ceiling 6 surface can be easily reduced.
[0021]
FIG. 3 shows a lighting apparatus according to a third embodiment of the present invention. The difference from the first embodiment is that the side wall forming the peripheral edge of the upper light projecting opening 1e of the apparatus body 1 is shown. The extension portion 1h is formed by extending the upper end of 1g substantially horizontally toward the center side of the instrument body 1 so as to substantially contact the upper end of the louver 5 over substantially the entire length in the longitudinal direction. The other configuration is substantially the same as that of the first embodiment.
[0022]
Even if comprised in this way, while exhibiting the effect similar to the said 1st Embodiment, the extension part 1h extended from the side wall 1g of the instrument main body 1 is between the louver 5 and the side wall 1g of the instrument main body 1. FIG. Therefore, the dust that rises due to the air conditioning or the like in the room and enters from the upper light projecting opening 1e is blocked by the extending portion 1h, and the groove-like portion at the lower end of the side wall 1g on which the louver 5 is placed In addition, it becomes difficult to collect on the upper surface of the louver 5, and the frequency of cleaning is reduced, and maintenance work is facilitated.
[0023]
FIG. 4 shows a fourth embodiment of the lighting fixture of the present invention. The difference from the third embodiment is that an extending portion 1h formed on the upper end of the side wall 1g of the fixture body 1 is formed. The light source 2 that is emitted from the upper light projecting opening 1e toward the ceiling 6 is extended obliquely downward toward the center of the instrument body 1 so as to substantially contact the upper end of the louver 5 so as not to substantially block the light from the light source 2. The other points are the same as in the third embodiment.
[0024]
Even if comprised in this way, while having the same effect as the said 3rd Embodiment, the straight tube | pipe type fluorescent lamp which is the light source 2 on the upper surface of the extension part 1h extended from the side wall 1g of the instrument main body 1 It can also be used as a reflective surface of 2a.
[0025]
【The invention's effect】
Thus, according to the first aspect of the present invention, in the invention described in claim 1, the ceiling surface located at the center of the mounting pitch of the luminaire and farthest from the fixture body is projected upward. The beam center of the light emitted from the light opening is directed, and this part is illuminated by the luminaires on both sides and brightened, and the ceiling surface on the side closer to it is brightly illuminated because the distance from the light source is short . In addition, since the light from one light source side is shielded by the reflector so that it does not reach the ceiling surface above the other light source across the center of the instrument body, the ceiling surface near the instrument body It is alleviated that becomes too bright. For this reason, the ceiling surface has a more uniform illuminance, and the luminance unevenness is reduced and the appearance can be improved.
[0026]
Is a further first aspect of the present invention, by rotating the anti-radiation plate, it is possible to change the direction toward the center of the beam light emitted from the upper light-projecting opening, the mounting pitch of the luminaire Even if the light source is different, the brightness unevenness on the ceiling surface can be reduced by rotating the reflector and changing the direction of the beam center of the light emitted from the upper light projecting opening. Even when the mounting pitch is changed, the luminance unevenness of the ceiling surface can be easily reduced.
[0027]
Further In the invention of claim 1, wherein the vessel member extends out not part from the side wall of the body, because there upwardly between the side walls of the louver and the instrument body, the upper projecting soaring by indoor heating and cooling The dust entering from the opening is less likely to accumulate on the portion where the louver is placed and on the upper surface of the louver, so that the frequency of cleaning is reduced and maintenance work is facilitated.
[Brief description of the drawings]
1A and 1B show a first embodiment of a lighting fixture of the present invention, in which FIG. 1A is a front view of a principal part in a partially broken state, and FIG. 1B is a schematic diagram showing a state attached to a ceiling; It is.
FIG. 2 is a perspective view showing a main part of a second embodiment of a lighting fixture of the present invention.
FIG. 3 is a partially broken front view showing a main part of a third embodiment of a lighting fixture of the present invention.
FIG. 4 is a partially cutaway front view showing a main part of a fourth embodiment of a lighting fixture of the present invention.
FIGS. 5A and 5B show a conventional lighting apparatus (first conventional example), in which FIG. 5A is a perspective view and FIG. 5B is a schematic diagram showing a cross section.
FIG. 6 is a cross-sectional view showing another conventional lighting fixture (second conventional example).
FIG. 7 is a perspective view showing a state in which the lighting apparatus is installed on the system ceiling.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Appliance main body 1e Upper light projection opening 1f Lower light projection opening 1g Side wall 2 Light source 5 Louver 6 Ceiling 7 Hanging tool 8 Reflector

Claims (1)

A device main body in which a plurality of elongate light sources are separated from each other and stored substantially in parallel, and a hanging tool that hangs the device main body from the lower surface of the ceiling and suspends light on the upper surface of the device main body. In the lighting fixture that is provided with an upper light projecting opening for irradiation and a lower light projecting opening for irradiating light on the floor side on the lower surface and is attached to the ceiling with a predetermined mounting interval, the upper light projecting opening An instrument in which a light beam center of light emitted from the upper light projecting opening is adjacently attached to the instrument body from the light source to the instrument body center side by reflecting light emitted from the light source obliquely above the instrument body; And a reflecting plate directed to the substantially central ceiling surface is formed , and the reflecting plate is formed so as to be rotatable about an axis substantially parallel to the lamp axis of the elongated light source, and the upper surface of the lower light projecting opening. On the side, the top is the side of the light source A louver is provided to control the light emitted from the lower light projecting opening, and the upper end of the side wall forming the end of the upper light projecting opening of the instrument body is in contact with the upper end of the louver. A lighting apparatus characterized by being extended .

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