JP2007128672A - Illumination apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an illumination apparatus capable of restraining the cost necessary for indirect illumination of ceiling and lowering of apparatus efficiency. <P>SOLUTION: The illumination apparatus 1 is composed of an apparatus main body 2, a flat plate part 5b, a plurality of side plate parts 5a formed so as to spread outward from peripheral edges 5d of the flat plate 5b, translucent members 6 arranged between side end parts 5aa, 5ab of adjacent side plate parts 5a, 5a, jointing respective side plate parts 5a, a metallic surrounding body 5 arranged on the apparatus main body 2, having polygonal shape in bottom view, and fluorescent lamps 3, 4 arranged in the surrounding body 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lighting fixture that is directly attached to or suspended from a ceiling.

  In high ceiling facilities such as factories, lighting fixtures are suspended from the ceiling or attached to a raceway or the like, which is a wiring duct disposed on the ceiling side. In this lighting fixture, a cover surrounding the discharge lamp is disposed on the fixture body provided with the discharge lamp, and the emitted light of the discharge lamp is reflected downward by the cover.

  And the lighting fixture which irradiates the partial light of a discharge lamp from a fixture main body to a ceiling surface is proposed so that a ceiling surface may not become dark. For example, a lighting fixture has been proposed in which a lighting opening is provided above the discharge lamp of the fixture body, and a translucent upper cover that covers the lighting opening is detachably disposed on the fixture body (Patent Literature). 1). In this prior art lighting fixture, a plurality of lighting openings are formed in a ring shape on the fixture body corresponding to the annular discharge lamp, and the translucent upper cover is formed in a donut shape. .

If there is a hole above the lamp of the appliance main body, the discharge lamp gets dirty more quickly due to intrusion of dust or the like into the appliance main body, leading to early light flux reduction. The translucent upper cover prevents dust and the like from entering the instrument body.
Japanese Unexamined Patent Publication No. 2004-265708 (page 6, FIG. 2)

  Since the lighting fixture of Patent Document 1 is provided with a plurality of holes (lighting openings) in the fixture main body along the annular discharge lamp, it takes time and labor for drilling, and the drilling and translucency are concerned. The upper cover has the disadvantage that it increases the cost of the luminaire. Also, by having a plurality of daylighting openings along the annular discharge lamp, the effective area of the reflecting surface reflected on the lower side of the instrument body is reduced, so that the amount of light from the discharge lamp on the lower side is correspondingly reduced. It has the disadvantage that it is reduced and instrument efficiency is reduced.

  An object of this invention is to provide the lighting fixture which can suppress the cost required in order to indirectly illuminate a ceiling surface, and the fall of fixture efficiency.

  The invention of the lighting device according to claim 1 includes: a fixture main body; a flat plate portion, a plurality of side plate portions arranged so as to spread outward from a peripheral edge of the flat plate portion, and side edges of adjacent side plate portions. A metal enclosure having a polygonal shape in a bottom view disposed in the instrument body; a fluorescent lamp disposed in the enclosure; It is characterized by comprising.

  In the present invention and the following inventions, each configuration is as follows unless otherwise specified.

  The fluorescent lamp may have any shape such as an annular shape or a straight tubular shape.

  The translucent member only needs to transmit or pass visible light in whole or in part, and may be a translucent plate, a lens, a prism, a punching metal plate, or the like.

  When the side plates of the enclosure are connected to each other by the translucent member, the angles of outward expansion of the side plates can be made substantially the same, and a uniform light distribution can be obtained. Further, it is possible to eliminate the need for welding finish or painting finish at the side edges of each side plate portion, and to suppress an increase in cost.

  According to the present invention, each of the direct light of the radiated light emitted from the fluorescent lamp and the reflected light reflected by the inner surface of the enclosure passes through the translucent member, and the instrument body of the transmitted light The back side of the instrument body is illuminated by the light directed toward the back side of the instrument.

  According to a second aspect of the present invention, there is provided the lighting device according to the first aspect, wherein the fluorescent lamp is disposed on the flat plate portion side from a middle position in the height direction of the side plate portion. .

  As the fluorescent lamp is moved away from the flat plate portion, direct light from the fluorescent lamp is applied to the translucent member, and the amount of light passing through the translucent member increases, but it is reflected by the side plate portion and emitted to the front of the enclosure. This reduces the amount of light and reduces the instrument efficiency.

  According to the present invention, the fluorescent lamp is disposed on the flat plate portion side from the middle position in the height direction of the side plate portion, thereby suppressing the reduction in the device efficiency and the back side of the device main body through the translucent member. The amount of light going in the direction is secured.

  According to the first aspect of the present invention, since the back side of the instrument body is illuminated by a part of the radiated light of the fluorescent lamp that passes through the translucent member of the enclosure, the ceiling surface side on which the instrument body is disposed becomes dark. This can be prevented. And by connecting between each side plate part of an enclosure with a translucent member, the angle which spreads outward of each side plate part can be made substantially the same, and uniform light distribution can be obtained. In addition, it is possible to eliminate the need for welding finishing or painting finishing of the side edges of the respective side plate portions, thereby suppressing an increase in cost.

  In addition, since there is no hole in the fixture body that allows a part of the emitted light from the fluorescent lamp to pass to the ceiling surface side, labor can be saved by eliminating the labor and time required for drilling, thus increasing the cost of the lighting fixture. While being able to suppress, the effective area of the reflective surface of an instrument main body is not impaired, and the fall of instrument efficiency can be prevented.

  According to the second aspect of the present invention, since the fluorescent lamp is disposed on the flat plate portion side from the middle position in the height direction of the side plate portion, it is possible to suppress a decrease in the efficiency of the appliance and to set the illumination area to a predetermined brightness. In addition, it is possible to secure a sufficient amount of light toward the back side of the instrument body via the translucent member, so that the back side of the instrument body can be illuminated.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, a first embodiment of the present invention will be described.

  1 to 5 show a first embodiment of the present invention, FIG. 1 is a lighting fixture, (a) is a partially cutaway schematic front view, (b) is a schematic bottom view, and FIG. (A) is a schematic front view, (b) is a schematic side view, FIG. 3 is another translucent member, (a) is a schematic front view, (b) is a schematic side view, FIG. 4 shows still another translucent member, (a) is a schematic front view, (b) is a schematic side view, FIG. 5 is a prism, (a) is a schematic front view, and (b) is a schematic side view. FIG.

  In FIG. 1, a lighting fixture 1 is a ceiling-mounted lighting fixture, and includes a fixture main body 2, fluorescent lamps 3 and 4, an enclosure 5 and a translucent member 6.

  The appliance body 2 is made of a steel plate, is formed in a rectangular box, and is attached to a wiring duct 7 whose upper surface 2 a is attached to the ceiling surface 8. And the lighting device (not shown) which lights the fluorescent lamps 3 and 4 is arrange | positioned inside. A power line (not shown) is drawn from the wiring duct 7 into the appliance main body 2, and this power line is connected to the lighting device. And the enclosure 5 is attached to the lower surface 2b of the instrument main body 2 by screwing or the like.

  The enclosure 5 includes a plurality of (four) side plate portions 5a, a flat plate portion 5b, and a translucent member 6. The side plate portion 5a and the flat plate portion 5b are made of, for example, aluminum (Al), and the inner surface 5c is a reflector formed on, for example, a mirror-finished reflecting surface. The flat plate portion 5b is formed in a substantially square shape, and the side plate portion 5a is formed so as to expand outward from the peripheral edge 5d of the flat plate portion 5b.

  The translucent member 6 is made of, for example, acrylic resin, and is disposed between the side ends 5aa and 5ab of the adjacent side plate portions 5a and 5a to connect the side plate portions 5a. The translucent member 6 is formed in a substantially triangular shape as shown in FIG. 2 (a), and as shown in FIG. 2 (b), a concave portion 12 is formed on each end face 11 of both side ends 6a and 6b. It is formed along the direction. The recess 12 is formed to be somewhat larger than the plate thickness of the side plate portion 5a of the enclosure 5.

  And the translucent member 6 inserts the side edge peripheral part (side end) 5aa of one side plate part 5a of the enclosure 5 from the top part 6c side into the concave part 12 on the side end 6a side, and flat plate part 5b from the lower end 5e. The recess 12 on the side end 6b side is inserted into the side end periphery (side end) 5ab of the other side plate 5a of the enclosure 5 from the top 6c side. And the translucent member 6 is engage | inserted between the adjacent side plate parts 5a and 5a by making the top part 6c side contact | abut to the flat plate part 5b side. Then, for example, an adhesive is injected between the side edge peripheral portions (side ends) 5aa, 5ab and the recess 12 of the side plate portions 5a, 5a to solidify the adhesive.

  As described above, the translucent member 6 is disposed between the side edges 5aa and 5ab of the adjacent side plate portions 5a and 5a, and connects the side plate portions 5a and 5a. By connecting each side plate part 5a, 5a with the translucent member 6, each side plate part 5a is hard to deform | transform and the angle which each side plate part 5a expands is substantially the same. As a result, the light distribution by the emitted light of the fluorescent lamps 3 and 4 is made uniform.

  Thus, the enclosure 5 is formed in a substantially box shape having the opening 9 and is formed in a substantially square shape in a bottom view as shown in FIG. A lamp socket and a lamp holder (not shown) are arranged inside. And the flat plate part 5b is attached to the instrument main body 2 as shown to Fig.1 (a). The instrument body 2 is attached to the wiring duct 7 so that the translucent member 6 is not located directly below the wiring duct 7. That is, of the light passing through the translucent member 6, the light directed to the ceiling surface 8 side (the back side of the instrument body 2) is not blocked by the wiring duct 7.

  The enclosure 5 may be bent after forming the notches 10 at the four corners of the rectangular aluminum plate to form the side plate portion 5a and the flat plate portion 5b, respectively, or the side plate portion 5a and the flat plate portion 5b. May be formed individually, and the side plate portion 5a may be formed so as to expand outward from the peripheral edge 5d of the flat plate portion 5b.

  The fluorescent lamps 3 and 4 are double-ring high-frequency lighting dedicated fluorescent lamps each formed in a square shape, and the rated lamp power is 73 W and 103 W, for example. The fluorescent lamps 3 and 4 are attached to the lamp socket and the lamp holder, respectively, and the bent portions 3a and 4a are concentric with the translucent member 6 (the notch portion 10) of the enclosure 5 so as to be enclosed. It is accommodated in the body 5. That is, the fluorescent lamps 3 and 4 are surrounded by the side plate portion 5 a and the flat plate portion 5 b of the enclosure 5, and the bent portions 3 a and 4 a face the translucent member 6.

  And as shown to Fig.1 (a), the fluorescent lamps 3 and 4 are arrange | positioned by the flat plate part 5b side from the position A of the height direction middle of each side plate part 5a. Thereby, the radiated light of the fluorescent lamps 3 and 4 is reflected by the inner surface 5c on the lower end 5e side of the side plate portion 5a, and this reflected light is emitted forward of the enclosure 5. The fluorescent lamps 3 and 4 are individually lit at a high frequency by a lighting device disposed in the instrument body 2.

  Next, the operation of the first embodiment of the present invention will be described.

  When the fluorescent lamps 3 and 4 are turned on, the respective radiated lights emitted from the fluorescent lamps 3 and 4 are directly reflected from the reflected light reflected from the inner surface 5c of the side plate portion 5a and the flat plate portion 5b of the enclosure 5. It is emitted from the opening 9 and illuminates the lower floor surface.

  The bent portion 4a of the fluorescent lamp 4 is in a positional relationship close to the translucent member 6 of the enclosure 5, and part of the emitted light emitted from the bent portion 4a side is translucent member. 6 is emitted outward. At this time, part of the radiated light traveling obliquely upward from the bent portion 4a side is also transmitted through the translucent member 6 and emitted to the upper side of the enclosure 5 (the back side of the instrument body 2). And since the translucent member 6 is not located just under the wiring duct 7 when attaching the instrument main body 2 to the wiring duct 7, the light radiate | emitted to the upper side of the enclosure 5 is the wiring duct 7. The ceiling surface 8 is illuminated without obstruction.

  Further, a part of the reflected light is reflected toward the translucent member 6, passes through the translucent member 6, and is emitted outward. In the reflected light, there is reflected light that is reflected by the inner surface 5c near the lower end 5e side of the side plate portion 5a and goes obliquely upward. A part of the reflected light traveling obliquely upward passes through the translucent member 6 and is emitted to the upper side of the enclosure 5 without being blocked by the wiring duct 7 to illuminate the ceiling surface 8.

  In this way, the ceiling surface 8 is illuminated by the light that passes through the translucent member 6 among the direct light and the reflected light from the fluorescent lamps 3 and 4 and is directed obliquely upward. This illumination prevents the ceiling surface 8 side from becoming dark.

  The fluorescent lamps 3 and 4 are disposed on the flat plate portion 5b side from the position A in the height direction of each side plate portion 5a, so that the emitted light from the fluorescent lamps 3 and 4 is on the lower end 5e side of the side plate portion 5a. Is reflected by the inner surface 5c of the light source and emitted to the lower floor surface side and passes through the translucent member 6. As a result, a decrease in the efficiency of the lighting fixture 1 is suppressed, and light (light quantity) directed toward the ceiling surface 8 via the translucent member 6 is secured. That is, the floor surface is illuminated with a predetermined brightness, and the ceiling surface 8 is illuminated so as not to be dark.

  The enclosure 5 is formed of a reflector made of, for example, aluminum (Al), and its inner surface 5c is formed on the reflecting surface. Therefore, the envelope 5 has a high reflectance and is reflected by the fluorescent lamps 3 and 4 reflected by the inner surface 5c. The amount of reflected light increases. When the amount of reflected light increases, the amount of reflected light that passes through the translucent member 6 and that moves obliquely upward increases, and the amount of light that illuminates the ceiling surface 8 also increases. As a result, the ceiling surface side is illuminated more brightly.

  And the lighting fixture 1 does not form the hole which passes a part of emitted light of the fluorescent lamps 3 and 4 to the ceiling surface 8 side in the enclosure 5 or the instrument main body 2 in order to illuminate the ceiling surface 8 brightly. . By not providing the hole, the effective area of the inner surface 5c of the flat plate portion 5b of the enclosure 5 is not reduced, so that a decrease in reflected light with respect to the radiated light of the fluorescent lamps 3 and 4 is prevented, and a decrease in instrument efficiency is prevented. The

  Further, since the holes are not provided, labor and time for forming the holes are not required, thereby saving labor. Further, since the side plate portions 5a and 5a of the enclosure 5 are connected by the translucent member 6, it is possible to save labor without requiring welding finish or painting finish at the side ends 5aa and 5ab of the side plate portions 5a. It becomes. As a result, an increase in cost of the lighting fixture 1 is suppressed.

  Instead of the translucent member 6, the translucent member 13 shown in FIG. 3 or the translucent member 14 shown in FIG. 4 can be used. The translucent member 13 (the translucent member 14) is formed in a substantially triangular shape in front view like the translucent member 6, and the side edge portions of the side plates 5 a and 5 a of the enclosure 5. (Side ends) Side edge peripheral portions 13a and 13b (14a and 14b) are fixed to the inner surface 5c or outer surface on the side of 5aa and 5ab with an adhesive. The translucent member 13 is made of, for example, an acrylic resin, and the translucent member 14 is made of, for example, an iron plate. The translucent member 14 has a plurality of holes 15 formed therein.

  The ceiling surface 8 side is illuminated by the direct light and reflected light of the fluorescent lamps 3 and 4 that are transmitted obliquely upward through the translucent member 13. Moreover, the ceiling surface 8 side is illuminated by the direct light and reflected light of the fluorescent lamps 3 and 4 that pass through the hole 15 of the translucent member 14 obliquely upward. And the light quantity which passes the translucent member 14 is adjusted with the magnitude | size or quantity of the hole 15, and the brightness by the side of the ceiling surface 8 is adjusted.

  Moreover, it replaces with the translucent member 6, and the prism 16 as a translucent member shown in FIG. 5 can be used. The prism 16 is made of, for example, polycarbonate (PC) resin, and is formed in a substantially triangular shape when viewed from the front as shown in FIG. 5 (a). As shown in FIG. 5 (b), each of the side ends 16a and 16b is provided. Concave portions 18 are formed in the end surface 17 along the longitudinal direction. The concave portion 18 is formed to be somewhat larger than the plate thickness of the side plate portion 5a of the enclosure 5.

  Further, as shown in FIG. 5B, the prism 16 gradually increases in thickness from the top 16e side to the lower end 16f side on the incident side 16c and the emission side 16d, and the thickness of the incident side 16c increases. It is formed to be larger than the thickness of the emission side 16d. The prism 16 is disposed between the side edges 5aa and 5ab of the side plate portions 5a and 5a adjacent to each other in the same manner as the translucent member 6.

  The prism 16 is formed in an appropriate shape according to the size of the side plate portion 5a of the enclosure 5 and the positional relationship with the fluorescent lamps 3 and 4.

  A part of the emitted light from the fluorescent lamps 3 and 4 incident on the incident side 16c of the prism 16 is refracted from the exit side 16d of the prism 16 obliquely upward as shown in FIG. 5B. Thereby, the light quantity which illuminates the ceiling surface 8 side increases, and the ceiling surface 8 side is illuminated brightly.

  Next, a second embodiment of the present invention will be described.

  FIGS. 6A and 6B are lighting fixtures showing a second embodiment of the present invention, in which FIG. 6A is a partially cutaway schematic front view, and FIG. 6B is a schematic bottom view. The same parts as those in FIG. 1 or parts corresponding to the same parts are denoted by the same reference numerals, and description thereof is omitted.

  A lighting fixture 19 shown in FIG. 6 is provided with annular fluorescent lamps 20 and 21 and an enclosure 22 in the appliance main body 2 instead of the fluorescent lamps 3 and 4 and the enclosure 5 in the lighting fixture 1 shown in FIG. It is a thing.

  The fluorescent lamps 20 and 21 are double-ring high-frequency lighting-only fluorescent lamps each formed in an annular shape, and the rated lamp power is 70 W and 100 W, for example. The fluorescent lamps 20 and 21 are attached to the lamp socket and the lamp holder, respectively, and are accommodated in the enclosure 22 so as to be concentric. That is, the fluorescent lamps 20 and 21 are surrounded by the side plate portion 22 a and the flat plate portion 22 b of the enclosure 22. The fluorescent lamps 20 and 21 are individually lit at a high frequency by a lighting device disposed in the fixture body 2.

  The envelope body 22 is formed in a conical shape having an opening 23, and is formed in a circular shape in a bottom view as shown in FIG. The enclosure 22 is made of, for example, aluminum (Al), and the inner surface 22c is a reflector formed on, for example, a mirror-finished reflecting surface.

  As shown in FIG. 6A, the enclosure 22 has a flat plate portion 22 b attached to the lower surface 2 b of the instrument body 2. And the notch part (not shown) in alignment with the lower end 22e from the flat plate part 22b is formed in the side-plate part 22a for every 90 degrees rotation direction with respect to the center of the enclosure 22, Four in this notch part. The translucent member 24 is disposed. Further, a lamp socket and a lamp holder (not shown) are disposed inside, and the fluorescent lamps 20 and 21 are attached to the lamp socket and the lamp holder.

  The translucent member 24 is formed in a substantially fan shape or a substantially triangular shape when viewed from the front, is formed in the same manner as the translucent member 6 shown in FIG. 2, and is similarly disposed between the side plate portions 22a and 22a. The portions 22a and 22a are connected. The enclosure 22 and the translucent member 24 surround the fluorescent lamps 20 and 21.

  Of the radiated light radiated from the fluorescent lamps 20, 21, direct light and a part of the reflected light reflected by the inner surface 22 c of the side plate portion 22 a of the enclosure 22 pass through the translucent member 24 and outward. Is emitted. At this time, light that is transmitted obliquely upward through the translucent member 24 is applied to the ceiling surface 8 to illuminate the ceiling surface 8 side. Thereby, it is prevented that the ceiling surface 8 side becomes dark.

It is a lighting fixture which shows the 1st Embodiment of this invention, (a) is a partially notched schematic front view, (b) is a schematic bottom view. Similarly, it is a translucent member, (a) is a schematic front view, (b) is a schematic side view. Similarly, it is another translucent member etc., (a) is a schematic front view, (b) is a schematic side view. Similarly, it is another translucent member, (a) is a schematic front view, (b) is a schematic side view. Similarly, it is a prism, (a) is a schematic front view, (b) is a schematic side view. It is a lighting fixture which shows the 2nd Embodiment of this invention, (a) is a partially notched schematic front view, (b) is a schematic bottom view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,19 ... Lighting fixture 2 ... Appliance main body 3, 4, 20, 21 ... Fluorescent lamp 5, 22 ... Enclosure 6, 13, 14, 16 ... Translucent member

Claims (2)

An instrument body;
A flat plate portion, a plurality of side plate portions arranged so as to spread outward from the peripheral edge of the flat plate portion, and a translucent member that is connected between the side edges of adjacent side plate portions and connects the side plate portions. A metal enclosure having a polygonal shape in a bottom view and disposed on the instrument body;
A fluorescent lamp disposed within the enclosure;
The lighting fixture characterized by comprising.   The lighting apparatus according to claim 1, wherein the fluorescent lamp is disposed on the flat plate portion side from a middle position in the height direction of the side plate portion.

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