JP2022144321A - Lighting device - Google Patents

Abstract

To provide a lighting device which is installed at a system ceiling and performs indirect lighting.SOLUTION: A lighting device A1 includes: one or more light source parts; one or more housing parts 2 which respectively house the light source parts; and one or more support parts. The housing part is disposed in a space enclosed by multiple T bars 80 forming a system ceiling S1. The support part supports the housing part 2 on the T bars 80. The housing part 2 has a bottom plate 20 facing a lighting space. At the housing part 2, an opening is provided above at least the bottom plate 20. The housing part 2 houses the light source part so that illumination light is emitted to the space through the opening.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present disclosure relates to lighting devices, and more particularly to lighting devices installed in system ceilings.

2. Description of the Related Art Conventionally, the ceilings of offices in office buildings, stores in commercial buildings, etc. are often configured with suspended ceilings called system ceilings. A system ceiling is a suspended ceiling that combines unit ceilings, and has a function that allows ceiling panels to be placed on top of it, and equipment such as lighting fixtures and air conditioning outlets to be easily installed (Japanese Industrial Standards A1445 "System Ceiling Configuration (Refer to “Methods for Testing Materials”).

Patent Literature 1 describes a lighting fixture installed on a system ceiling. The lighting fixture described in Patent Document 1 (hereinafter referred to as conventional example) has a long light source unit and a long fixture body that accommodates the light source unit.

The instrument main body includes a long box-shaped main body portion having an opening surface on the lower surface, which is the irradiation surface side, and a power supply device for supplying power to the light source unit. The main body has a frame surrounding the periphery and an upper plate covering the upper surface of the frame.

The frame body portion has a pair of frame side plates extending in the longitudinal direction and a pair of frame end plates arranged at both ends of the frame side plates. In addition, a plurality of claws to be hooked to the T-bar of the system ceiling are provided on the outer surface of the frame end plate.

In the conventional example, direct illumination is performed by irradiating the space with light emitted from the light source unit through the opening surface on the lower surface of the main body.

Japanese Unexamined Patent Application Publication No. 2020-119732

By the way, among lighting fixtures (lighting devices) used for system ceilings, there is a demand for lighting fixtures (lighting devices) that perform not only direct lighting as in the conventional example but also indirect lighting.

An object of the present disclosure is to provide a lighting device that can be installed on a system ceiling to provide indirect lighting.

A lighting device according to an aspect of the present disclosure is arranged in a space surrounded by one or more light source units that emit illumination light, and a plurality of T-bars that house the light source units and constitute a system ceiling. One or more receiving portions and one or more supporting portions for supporting the receiving portions on the T-bar. The accommodation portion has a bottom plate facing the illumination space, and an opening is provided at least above the bottom plate. The accommodation portion accommodates the light source portion such that the illumination light is emitted toward the space through the opening.

The lighting device of the present disclosure has the effect that it can be installed on the system ceiling to perform indirect lighting.

FIG. 1 is a perspective view of a state in which a lighting device according to an embodiment of the present disclosure is installed on a system ceiling. FIG. 2 is an exploded perspective view of the lighting device as seen from below. FIG. 3 is an exploded perspective view of the illumination device as seen from above. FIG. 4 is a perspective view of the lighting device as seen from above. FIG. 5 is a cross-sectional view (a cross-sectional view taken along the line X1-X2 in FIG. 1) of the main part of the illumination device. FIG. 6 is a perspective view showing a main part and a power supply unit of the same lighting device. FIG. 7 is an exploded perspective view seen from below of a support device used when installing the same lighting device on the system ceiling. FIG. 8 is an exploded perspective view of the supporting device as seen from above. FIG. 9 is a cross-sectional view (Y1-Y2 cross-sectional view in FIG. 1) of the main part of the supporting device. FIG. 10 is a cross-sectional perspective view of Modification 1 of the illumination device of the same. FIG. 11 is a perspective view of a second modified example of the above lighting device installed on the system ceiling. FIG. 12 is a perspective view of a state in which Modification Example 3 of the same lighting device is installed on the system ceiling.

The illumination device A1 according to the embodiment of the present disclosure will be described in detail below with reference to the drawings. However, each drawing described in the following embodiments is a schematic drawing, and the ratio of the size and thickness of each component does not necessarily reflect the actual dimensional ratio. Note that the configurations described in the following embodiments are merely examples of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications can be made according to design and the like as long as the effects of the present disclosure can be achieved.

(1) Overview of lighting device according to embodiment Lighting device A1 according to the embodiment includes one or more light source units 1, one or more housing units 2 that house the light source units 1, and one or more support units. 3 (see FIGS. 1-3). The accommodation section 2 is arranged in a space surrounded by a plurality of T-bars 80 forming the system ceiling S1. The supporting portion 3 allows the accommodating portion 2 to be supported by the T-bar 80 . The housing portion 2 has a bottom plate 20 facing the illumination space. The housing portion 2 is provided with an opening 21 at least above the bottom plate 20 . The accommodation portion 2 accommodates the light source portion 1 so that the illumination light is emitted toward the space through the opening portion 21 .

The T-bars 80 include a plurality of main T-bars 80A and a plurality of cross T-bars 80B (see FIG. 1). The plurality of main T-bars 80A are arranged parallel to each other at regular intervals. The plurality of cross T-bars 80B are arranged parallel to each other at regular intervals so as to intersect (cross) the plurality of main T-bars 80A. The basic structure of the two types of T-bars 80 (main T-bar 80A and cross T-bar 80B) is common except for their longitudinal dimensions. That is, the T-bar 80 includes a vertical piece 801 formed in a long flat plate shape, a joint portion 802 provided at one end (upper end) of the vertical piece 801 in the widthwise direction, and a and a pair of support pieces 800 provided at the other end (lower end) of the (see FIG. 1).

The joint portion 802 is formed in a hollow quadrangular prism shape with both ends in the longitudinal direction open. The joint portion 802 is connected to the upper end of the vertical piece 801 at the center of one side surface (lower surface) in the transverse direction.

Each of the pair of support pieces 800 is formed in a trough shape with both ends in the longitudinal direction open. Each support piece 800 protrudes from the lower end of the vertical piece 801 along the thickness direction of the vertical piece 801 in a direction away from each other.

A T-bar 80 is joined to each hanger bolt by a plurality of T-hangers attached to each of a plurality of hanger bolts embedded in the ceiling slab of the building. Each of the plurality of T-hangers is screwed to a corresponding one of the plurality of hanging bolts, and the joint portion 802 of the T-bar 80 is sandwiched from the lateral direction of the joint portion 802 so that the T-bar is mounted on the T-bar. 80.

By arranging a plurality of main T-bars 80A and a plurality of cross T-bars 80B in parallel with each other at equal intervals, a plurality of substantially square spaces each having a side length equal to the interval (hereinafter referred to as facility space) ) are arranged in a grid pattern.

The ceiling panel 81 is preferably made of, for example, a square gypsum board. However, the ceiling panel 81 may be made of a plate material other than the gypsum board (for example, wood or metal material). The four side surfaces of the ceiling panel 81 have steps along the thickness direction (vertical direction) of the ceiling panel 81 . In the embodiment, a portion of the peripheral edge of the ceiling panel 81 where the width in the thickness direction is narrower than that of the central portion of the ceiling panel 81 due to the step on each side surface of the ceiling panel 81 is called an end portion 811 . A portion (central portion) of the ceiling panel 81 excluding the end portion 811 is called a main portion 810 (see FIG. 2).

The ceiling panel 81 is inserted into the facility space arranged in a grid pattern, and the four T-bars 80 are placed so that the edges 811 of the four sides are placed on the support pieces 800 of the four T-bars 80 surrounding the facility space. 80 supported. That is, the equipment space surrounded by the four T-bars 80 is blocked by the ceiling panel 81 . Alternatively, instead of the ceiling panel 81, facilities such as lighting fixtures and air-conditioning outlets may be supported by the four T-bars 80. FIG.

Thus, in the lighting device A1 according to the embodiment, one or more housing portions 2 housing one or more light source portions 1 are supported by the T-bar 80 by one or more support portions 3, and the housing portion 2 is Illumination light from the light source unit 1 is emitted to the space (equipment space) through the opening 21 . As a result, the illumination device A1 according to the embodiment can perform indirect illumination with the illumination light emitted to the space (equipment space) when installed on the system ceiling S1.

(2) Details of lighting device according to embodiment Lighting device A1 (hereinafter abbreviated as lighting device A1) according to the embodiment includes, as shown in FIGS. A support portion 3 , a pressing plate 4 and a translucent panel 5 are provided. The lighting device A1 preferably further includes a power supply unit C1.

However, the illumination device A1 is installed on the system ceiling S1 in combination with the support device B1. In other words, the lighting device A1 and the support device B1 constitute a system ceiling lighting fixture.

In the following description, unless otherwise specified, the up/down, left/right, and front/rear directions indicated by arrows in FIGS. 2 and 3 are defined as the up/down, left/right, and front/rear directions of the lighting device A1.

(2-1) Light Source Section The illumination device A1 includes two light source sections 1. The light source section 1 is a light source. These two light source units 1 may be referred to as a first light source unit 1A and a second light source unit 1B (see FIGS. 2 and 3).

Each of the two light source units 1 includes two substrates 10, a plurality of light emitting elements mounted on the surfaces (upper surfaces) of the two substrates 10, and a plurality of connectors mounted on the upper surfaces of the two substrates 10. 12 and . Each of the two light source units 1 further has a mounting plate 14 and a plurality of fixtures 15 .

The plurality of light-emitting elements are, for example, package-type LEDs 11 composed of white LEDs (Light Emitting Diodes) for illumination. However, the plurality of LEDs 11 may include a plurality of types of LEDs with different emission colors, for example, an incandescent LED and a neutral white LED. The light-emitting element may be an organic electroluminescence element or a light-emitting element other than the LED, such as a laser diode.

Both of the two substrates 10 are formed in an elongated rectangular shape. A plurality of LEDs 11 are mounted on the first surface (upper surface) of the substrate 10 so as to be arranged in two rows along the longitudinal direction of the substrate 10 (see FIGS. 3, 5 and 6). Two connectors 12 are mounted on one end of the two substrates 10 in the longitudinal direction. These two connectors 12 are electrically connected to printed wiring conductors formed on the surface of each board 10 . Further, each connector 12 is electrically connected to a plurality of LEDs 11 mounted on the surface of each substrate 10 via printed wiring conductors. One light source unit 1 is configured by electrically and mechanically connecting the two substrates 10 via the two connectors 12 .

The mounting plate 14 has a first mounting piece 140, a fixed piece 141, a support piece 142, a connecting piece 143, a second mounting piece 144, and a vertical piece 145 (see FIGS. 3 and 5). The first attachment piece 140 is formed in an elongated rectangular shape. The fixed piece 141 is formed in an elongated rectangular shape. The fixed piece 141 stands upward from one longitudinal end of the first attachment piece 140 . In addition, one female threaded portion 1410 is provided near each end in the longitudinal direction of the fixed piece 141 (see FIG. 5). The support piece 142 is formed in a long rectangular shape and protrudes from the upper end of the fixed piece 141 along the thickness direction of the fixed piece 141 so as to face the first mounting piece 140 .

The connecting piece 143 is formed in a long rectangular shape and stands upward from the other longitudinal end of the first mounting piece 140 . However, the width of the connecting piece 143 in the short direction (vertical direction) is substantially equal to the width of the fixed piece 141 in the short direction (vertical direction).

The second attachment piece 144 is formed in an elongated trapezoid (see FIG. 3). Of the sides along the longitudinal direction of the second mounting piece 144 , the side corresponding to the bottom of the trapezoid is connected to the upper end of the connecting piece 143 . The vertical piece 145 is formed in an elongated rectangular shape. The vertical piece 145 protrudes downward from the side corresponding to the upper base of the trapezoid among the sides along the longitudinal direction of the second attachment piece 144 .

A plurality of fixtures 15 are for fixing the substrate 10 to the upper surface of the first mounting piece 140 . Each fixture 15 has a rectangular main piece 150, a pair of caulking pieces 151 standing upward from both longitudinal ends of the main piece 150, and a pair of projecting pieces 152 (FIGS. 5 and 5). 6). The crimping piece 151 is formed in a hook shape. The projecting piece 152 is formed in a rectangular shape.

The pair of crimping pieces 151 and the pair of projecting pieces 152 of each fixture 15 are inserted from below the first mounting piece 140 into a pair of grooves penetrating the first mounting piece 140 in the thickness direction (vertical direction). Furthermore, the pair of crimping pieces 151 and the pair of projecting pieces 152 of each fixture 15 are inserted from below the substrate 10 into the pair of grooves in the thickness direction (vertical direction) of the substrate 10 . By crimping the pair of crimping pieces 151 toward the outside of the substrate 10, the substrate 10 is fixed to the upper surface of the first mounting piece 140 (see FIG. 6).

(2-2) Housings The lighting device A1 has two housings 2 . These two storage portions 2 are sometimes referred to as a first storage portion 2A and a second storage portion 2B.

Each of the two storage sections 2 has a bottom plate 20 , a wall plate 22 , a hidden plate 23 and a resting portion 24 . The bottom plate 20 is formed in a long rectangular flat plate shape. However, the bottom plates 20 of the two storage portions 2 are joined at one end in the longitudinal direction to form an L shape as a whole (see FIGS. 2 and 3).

The wall plate 22 of each of the two housings 2 is formed in an elongated rectangular shape. A fixed piece 220 protrudes from one end (lower end) along the longitudinal direction of each wall plate 22 (see FIG. 5). The fixed piece 220 is formed in a long rectangular shape having the same length as the wall plate 22 . The fixed piece 220 is fixed to the upper surface of the bottom plate 20 by an appropriate method such as spot welding. The wall plate 22 fixed to the bottom plate 20 by the fixing piece 220 protrudes upward along the thickness direction (vertical direction) of the bottom plate 20 from the inner edge along the longitudinal direction of the bottom plate 20 (see FIG. 5). .

The hidden plates 23 of each of the two housings 2 are formed in an elongated rectangular shape. The hidden plate 23 protrudes in the same direction (upward) as the wall plate 22 along the thickness direction (vertical direction) of the bottom plate 20 from the outer edge along the longitudinal direction of the bottom plate 20 . However, the width of the hidden plate 23 in the lateral direction (vertical direction) is longer than the width in the height direction of the T-bar 80 (see FIG. 5).

Also, the hidden plates 23 of the two housings 2 are connected by a reinforcing plate 25 (see FIG. 6). The reinforcing plate 25 includes a rectangular main piece 250 and a pair of fixed pieces 251 projecting from two opposite sides of the main piece 250 . The reinforcing plate 25 is provided between the two hidden plates 23 so that one fixed piece 251 is fixed to one hidden plate 23 and the other fixed piece 251 is fixed to the other hidden plate 23 (Fig. 3). A rectangular groove 252 is provided in the lower portion of the main piece 250 .

The mounting portions 24 of the two storage portions 2 are provided at one end (upper end) along the longitudinal direction of the two hidden plates 23 (see FIGS. 3 and 5). The placing portion 24 is formed in a narrow rectangular shape. The mounting portions 24 protrude from the upper ends of the two hidden plates 23 in the direction opposite to the bottom plate 20 along the thickness direction of the hidden plates 23 (see FIG. 5).

Thus, the two accommodation units 2 accommodate one light source unit 1 in an accommodation space surrounded by the bottom plate 20 , the wall plate 22 and the hidden plate 23 . The light source unit 1 is accommodated by screwing the fixing piece 141 to the hidden plate 23 of the housing unit 2 by screwing one screw 146 into each of the plurality of female screw portions 1410 of the fixing piece 141 of the mounting plate 14 . It is fixed to the part 2 (see FIG. 5). The first attachment piece 140 of the attachment plate 14 to which the substrate 10 is attached is arranged on the upper surface of the bottom plate 20 of the housing portion 2 (see FIG. 5). In addition, the two housing portions 2 have openings 21 above the bottom plate 20 (see FIG. 5). The accommodation spaces of the two accommodation units 2 are connected to the facility space through the openings 21 . Therefore, illumination light emitted from the plurality of LEDs 11 of the light source section 1 is emitted to the equipment space through the opening 21 of the housing section 2 .

(2-3) Supporting Portion The lighting device A1 has two supporting portions 3 . Each of the two support parts 3 has a main piece 30, a fixed piece 31 and a support piece 32 (see FIG. 5).

The main piece 30 is formed in an elongated rectangular shape. However, the length in the longitudinal direction of the main piece 30 is shorter than the length in the longitudinal direction of one hidden plate 23 of the housing portion 2 .

The fixed piece 31 is formed in a long rectangular shape with a narrow width. The length of the fixed piece 31 in the longitudinal direction is approximately half the length of the main piece 30 in the longitudinal direction. The fixed piece 31 protrudes along the thickness direction of the main piece 30 at the upper end from one end in the longitudinal direction of the main piece 30 to approximately the center in the longitudinal direction. A female screw portion 310 is provided at the center of the fixing piece 31 in the longitudinal direction.

The support piece 32 is formed in a long rectangular shape with a narrow width. The support piece 32 protrudes in the same direction as the fixed piece 31 along the thickness direction of the main piece 30 at the lower end from one longitudinal end to the other end of the main piece 30 . The main piece 30, the fixed piece 31, and the support piece 32 are preferably formed integrally by processing a single metal plate.

The two supporting parts 3 are attached to the hidden plates 23 of the two accommodating parts 2 respectively. Each support part 3 is attached to the hidden plate 23 so that the fixing piece 31 is brought into contact with the mounting part 24 of the housing part 2 from below. Each support portion 3 is attached to the hidden plate 23 by screwing the main piece 30 to the outer surface of the hidden plate 23 . However, the support portion 3 may be attached to the hidden plate 23 by a method other than screwing, such as spot welding.

(2-4) Pressing Plate Each of the two pressing plates 4 has a restraining portion 40, a first vertical piece 41, a horizontal piece 42, and a second vertical piece 43 (see FIGS. 3 and 5).

Each of the suppressing portion 40 and the second vertical piece 43 is formed in a wide rectangular shape. However, the longitudinal lengths of the suppressing portion 40 and the second vertical piece 43 are equal to the longitudinal length of the fixed piece 31 of the support portion 3 .

Also, the first vertical piece 41 and the horizontal piece 42 are each formed in a narrow rectangular shape. One longitudinal end of the suppressing portion 40 is coupled to one longitudinal end of the first vertical piece 41 . The other end of the first vertical piece 41 is joined to one longitudinal end of the horizontal piece 42 . The other longitudinal end of the horizontal piece 42 is connected to one longitudinal end of the second vertical piece 43 . A circular insertion hole is provided in the longitudinal center of the horizontal piece 42 . In addition, it is preferable that the suppression part 40, the 1st vertical piece 41, the horizontal piece 42, and the 2nd vertical piece 43 are processed and integrally formed of the metal plate of 1 sheet.

The two pressing plates 4 are fixed to the fixed pieces 31 of the two support portions 3 one by one. Each presser plate 4 is fixed to the fixed piece 31 of the support portion 3 by screwing the screw 44 inserted through the insertion hole provided in the horizontal piece 42 into the female screw portion 310 of the fixed piece 31 (FIG. 5). reference).

(2-5) Translucent Panel The translucent panel 5 is formed into an L-shaped flat plate from a translucent synthetic resin such as an acrylic resin or a polycarbonate resin. However, in order to diffuse the illumination light emitted from the light source unit 1, the light-transmitting panel 5 is preferably formed milky white by mixing a filler with a synthetic resin material. Note that the translucent panel 5 may be made of inorganic glass such as quartz glass. A plurality of light-transmitting panels having the same shape and size may be stacked in the thickness direction to form one light-transmitting panel 5 .

The translucent panel 5 is attached to the mounting plate 14 of each of the two light source units 1 . The translucent panel 5 is placed on the supporting pieces 142 and the second mounting pieces 144 of the two mounting plates 14 respectively. One screw is inserted into each of the plurality of mounting holes 50 (see FIGS. 2 and 3) provided in the translucent panel 5, and the plurality of screws are provided in the second mounting piece 144. It is screwed into a plurality of internal threads 147 (see FIG. 5). As a result, the translucent panel 5 is attached to the second attachment pieces 144 of the two attachment plates 14 . In consideration of the thermal expansion of the light-transmitting panel 5 made of a synthetic resin material, the longitudinal direction of the plurality of mounting holes 50 provided in the light-transmitting panel 5 is aligned with the longitudinal direction of the light-transmitting panel 5. It is preferably formed in an oval shape.

Thus, the translucent panel 5 attached to the mounting plate 14 covers the opening 21 of the housing portion 2 (see FIG. 5). That is, the illumination light emitted from the light source unit 1 is diffused when passing through the translucent panel 5 and emitted into the equipment space.

(2-6) Power Supply Unit The power supply unit C1 has a power supply and an attachment member 91 for attaching the power supply to the T-bar 80 (see FIGS. 3 and 6).

The power supply device is configured to convert AC power supplied from a commercial power system into DC power, supply the DC power to the light source unit 1, and cause the plurality of LEDs 11 of the light source unit 1 to emit light. Further, the power supply device is configured to dim the illumination light of the light source unit 1 by adjusting the DC power supplied to the light source unit 1 according to the dimming signal input from the outside. Furthermore, when the light source unit 1 is configured to emit a plurality of illumination lights of different colors, the power supply device adjusts the overall illumination light color by adjusting the illumination light for each light color. (Toning) may be configured.

The mounting member 91 has a mounting base 910 and a cover 911 . The mount 910 is formed in the shape of an elongated square (see FIG. 3). Both ends of the mounting base 910 in the longitudinal direction are bent downward into a hook shape.

A power supply device is attached to the upper surface of the mounting base 910 . An input terminal block 92 is attached to one end of the mounting base 910 in the longitudinal direction. The input terminal block 92 is electrically connected to AC input terminals of the power supply. The input terminal block 92 is detachably connected to a power line connected to an electric power system. An output terminal block 93 is attached to the other end of the mounting base 910 in the longitudinal direction. The output terminal block 93 is electrically connected to a DC output terminal of the power supply. The output terminal block 93 is detachably connected to an electric wire 94 electrically connected to the light source section 1 (see FIG. 6).

The cover 911 is formed in an elongated rectangular trough shape. The cover 911 is attached to the mounting base 910 so as to cover the power supply device from above (see FIG. 3).

The power supply unit C1 is attached to the two T-bars 80 by hooking both longitudinal ends of the attachment base 910 on the joints 802 of the two adjacent T-bars 80 (see FIG. 3). The input terminal block 92 and the two light source units 1 are electrically connected via two electric wires 94 . The two electric wires 94 are led out of the housing portion 2 through the grooves 252 of the reinforcing plate 25 (see FIG. 6).

(3) Details of Support Device The support device B<b>1 includes a first member 6 , two second members 7 , and two pressing plates 4 . The first member 6 has a supported portion 60, a supporting portion 61, and a connecting portion 62 (see FIGS. 7 and 8). The second member 7 has an intermediate portion 70 and a fixed portion 71 .

The connecting portion 62 of the first member 6 is composed of two side plates 620 . Each of the two side plates 620 is formed in an elongated rectangular shape. The two side plates 620 are connected at substantially right angles to each other at their ends in the longitudinal direction. That is, the connecting portion 62 is formed in an L shape as a whole.

The supported portion 60 is formed in a long rectangular shape with a narrow width. The supported portion 60 protrudes from one longitudinal end (lower end) of each of the two side plates 620 along the thickness direction of the side plate 620 toward the outer surface of the connecting portion 62 .

The support portion 61 is formed in a long rectangular shape with a narrow width. The support portion 61 protrudes from the other end (upper end) of each of the two side plates 620 along the longitudinal direction toward the outer surface side of the connecting portion 62 along the thickness direction of the side plate 620 . The supported portion 60 and the supporting portion 61 protrude in the same direction with respect to each side plate 620 . The supported portion 60, the supporting portion 61, and the connecting portion 62 are preferably formed integrally by processing a single metal plate. In addition, the inner surface of the connecting portion 62 (the surface facing the equipment space of the system ceiling S1; the same shall apply hereinafter) is preferably coated with a paint having a visible light reflectance of 80% to 90% or more, for example. .

Each of the two second members 7 has an intermediate portion 70 and a fixed portion 71 . The intermediate portion 70 is formed in an elongated rectangular shape. However, the longitudinal length of the intermediate portion 70 is shorter than the longitudinal length of one side plate 620 of the connecting portion 62 .

The fixed portion 71 is formed in a long rectangular shape with a narrow width. The longitudinal length of the fixed portion 71 is approximately half the longitudinal length of the intermediate portion 70 . The fixing portion 71 protrudes along the thickness direction of the intermediate portion 70 at the upper end of the intermediate portion 70 from one end in the longitudinal direction to the center in the longitudinal direction. A female screw portion 72 is provided at the center of the fixing portion 71 in the longitudinal direction. It is preferable that the intermediate portion 70 and the fixed portion 71 are integrally formed by processing a single metal plate.

The two second members 7 are attached to the two side plates 620 of the first member 6 one by one. Note that each second member 7 is preferably joined to the side plate 620 by spot-welding the intermediate portion 70 to the outer surface of the side plate 620 . However, the second member 7 may be attached to the side plate 620 by a method other than spot welding.

Each of the two presser plates 4 has the same configuration as the presser plate 4 provided in the illumination device A1. The two pressing plates 4 are fixed to the fixing portions 71 of the two second members 7 one by one. Each pressing plate 4 is fixed to the fixing portion 71 of the second member 7 by screwing the screw 44 inserted through the insertion hole provided in the horizontal piece 42 into the female screw portion 72 of the fixing portion 71 (Fig. 9).

The support device B1 is coupled with the two receptacles 2 of the lighting device A1. Here, in the two housing portions 2 of the lighting device A1, a longitudinal end portion (rear end portion) of the first housing portion 2A and a longitudinal end portion (right end portion) of the second housing portion 2B are fixed. One plate 26 is provided (see FIG. 3). Then, in the first member 6 of the support device B1, the longitudinal ends of the two side plates 620 forming the connecting portion 62 are attached to the fixed plates 26 of the two accommodating portions 2, respectively. screwed down. As a result, the two housings 2 of the lighting device A1 and the supporting device B1 are combined in a square frame shape (see FIG. 4).

(4) Construction Procedure of Lighting Device Next, a procedure (construction procedure) for mounting the lighting device A1 on the system ceiling S1 will be described.

First, in the system ceiling S1, the worker who performs the construction work has the ceiling panel 81 at the place where the lighting device A1 is installed (hereinafter referred to as the first facility space) and the ceiling panel 81 next to that place (next front in FIG. 1). The ceiling panel of the place (hereinafter referred to as the second equipment space) is removed from the T-bar 80.

After removing the four presser plates 4 from the lighting device A1 and the supporting device B1, the operator inserts the lighting device A1 coupled with the supporting device B1 from below into the first facility space. A worker supports a plurality of T-bars 80 facing the first facility space with the support pieces 32 of the two support portions 3 of the lighting device A1 and the supported portion 60 of the first member 6 of the support device B1. Lay on strip 800 (see FIGS. 5 and 9).

Next, the operator draws out the two electric wires 94 electrically connected to the two light source units 1 through the grooves 252 of the reinforcing plate 25 to the outside of the housing unit 2 .

Subsequently, the operator attaches three The holding plates 4 are fixed one by one. Then, the operator moves the gap between the holding plate 4 fixed to the support portion 3 of the first housing portion 2A and the mounting portion 24 of the first housing portion 2A, and the first housing portion 2A in the left-right direction. The end portion 811 of the ceiling panel 81 inserted from the second facility space is inserted into the gap between the pressing plate 4 fixed to the second member 7 and the support portion 61 of the first member 6 . That is, the operator places the end portion 811 of the ceiling panel 81 on the placing portion 24 of the first housing portion 2A and the support portion 61 of the supporting device B1 to support the top surface of the first facility space. It is closed with a ceiling panel 81 .

Then, the operator attaches the pressing plate 4 to the fixing piece 31 of the support portion 3 attached to the second housing portion 2B. In addition, the operator forms a notch or a through-hole in the corner portion facing the reinforcing plate 25 in the vertical direction in the ceiling panel 81 arranged in the first facility space, and inserts two electric wires 94 in the notch or the through-hole. is preferably inserted.

Next, the worker installs the power supply unit C1 on the two T-bars 80 in the second facility space, and then electrically connects the two wires 94 of the lighting device A1 to the output terminal block 93 of the power supply unit C1. (See Figure 6). Further, the operator electrically connects the power line to the input terminal block 92 of the power supply unit C1.

Finally, the worker inserts the ceiling panel into the second equipment space from below, places the ends of the ceiling panel on the support pieces 800 of the plurality of T-bars 80 facing the second equipment space, and inserts the ceiling panel into the second equipment space. Install ceiling panels.

The installation work (construction work) of the lighting device A1 on the system ceiling S1 is completed by the procedure described above. However, the construction procedure described above is an example, and the order of some or all of the procedures may be changed.

(5) Operation of lighting device The lighting device A1 installed on the system ceiling S1 as described above emits illumination light emitted from the light source unit 1 through the opening 21 of the housing unit 2 into the equipment space. The illumination light emitted to the facility space is reflected by the surface (lower surface) of the ceiling panel 81 arranged in the facility space, and is irradiated to the illumination space below the ceiling panel 81 . In other words, the lighting device A1 can be installed on the system ceiling S1 and perform indirect lighting by reflecting most of the illumination light emitted from the light source unit 1 onto the ceiling panel 81 and illuminating the illumination space.

(6) Modifications of lighting device according to embodiment Next, several modifications of the lighting device A1 according to the embodiment will be described. However, in each modified example described below, the same reference numerals may be assigned to components common to the lighting device A1 according to the embodiment, and illustration and description thereof may be omitted.

(6-1) Modification 1
As shown in FIG. 10 , the illumination device A1 of Modification 1 differs from the illumination device A1 according to the embodiment in the configuration of the translucent panel 5 . In the lighting device A1 of Modification 1, the translucent panel 5 is arranged to stand along the thickness direction (vertical direction) of the bottom plate 20 of each of the first housing portion 2A and the second housing portion 2B.

The light-transmitting panel 5 in Modification 1 is formed in a long rectangular shape from a light-transmitting synthetic resin material such as acrylic resin and polycarbonate resin. In addition, unlike the translucent panel 5 in the embodiment, the translucent panel 5 in the modified example 1 is preferably formed to be colorless and transparent without being mixed with a filler. However, the light-transmitting panel 5 in Modification 1 may be formed milky white by mixing a filler in the same manner as the light-transmitting panel 5 in the embodiment.

Thus, in the illumination device A1 of Modification 1, foreign matter such as dust is less likely to adhere (accumulate) on the surface of the translucent panel 5 than in the embodiment in which the translucent panel 5 is laid horizontally. Become. As a result, compared to the embodiment, the illumination device A1 of Modification 1 can reduce the frequency of cleaning the translucent panel 5 and improve maintainability.

(6-2) Modification 2
The lighting device A2 of Modification 2 is configured by installing four lighting devices A1 according to the embodiment, one each, in a total of four equipment spaces adjacent to each other in the front, back, left and right in the system ceiling S1. (see Figure 11). However, in the lighting device A2 of Modification 2, the four lighting devices A1 are installed in the installation space of the system ceiling S1 with their directions changed by 90 degrees.

Thus, in the illumination device A2 of Modified Example 2, the storage units 2 are arranged on the periphery of the four equipment spaces arranged in two rows and two columns. In the lighting device A2 of Modification 2, illumination light emitted from the light source unit 1 housed in the housing unit 2 is reflected on the surfaces (lower surfaces) of the four ceiling panels 81 installed in the four facility spaces. Illumination space can be illuminated indirectly.

(6-3) Modification 3
The illumination device A3 of Modified Example 3 has only one light source unit 1, one accommodation unit 2, one support unit 3, one pressing plate 4, and one translucent panel 5, and does not use the support device B1. It is different from the lighting device A1 according to the embodiment.

In the illumination device A3 of Modified Example 3, the bottom plate 20 of the housing portion 2 is formed in an I shape (rectangle) instead of an L shape (see FIG. 12). However, the illumination device A3 of Modification 3 is preferably configured such that the hidden plates 23 protrude parallel to each other from both longitudinal ends of the housing portion 2 .

Thus, in the facility space where the lighting device A3 of Modification 3 is installed, the end of one of the two opposing sides of the ceiling panel 81 is placed on the mounting portion of the housing portion 2 of the lighting device A3. The end of the other side is placed on the support piece 800 of the T-bar 80 . As a result, the ceiling panel 81 is installed in the facility space while being obliquely inclined with respect to the other horizontal ceiling panels 81 (see FIG. 12). Here, since the gap between the illumination device A3 of Modification 3 and the obliquely inclined ceiling panel 81 is blocked by the concealing plate 23 protruding from both ends in the longitudinal direction of the housing portion 2, the T-bar 80 can be seen through the gap. (See FIG. 12). In addition, in FIG. 12, one illumination device A3 of Modification 3 is installed in each of a total of four equipment spaces adjacent to each other in the front, rear, left, and right directions.

As described above, the lighting device A3 of Modification 3 can be installed on the system ceiling S1 to perform indirect lighting without using the support device B1.

(6-4) Others The ceiling panel arranged in the facility space where the lighting devices A1 to A3 are installed is not limited to a flat panel, and may be, for example, a ceiling panel formed in a hemispherical or semi-cylindrical shape. . Further, the equipment space of the system ceiling S1 is not limited to a square shape, and may be a rectangular shape. Furthermore, in the illumination devices A1 to A3, the wall plate 22 of the housing portion 2 may be made of a material that transmits illumination light.

(7) Advantages of Lighting Device According to Embodiment The lighting device A1 (including the lighting devices A2 and A3 of Modifications 1 to 3) is provided with the mounting portion 24 in the housing portion 2 . The mounting portion 24 can support the ceiling panel 81 by mounting the end portion 811 of the ceiling panel 81 constituting the system ceiling S1.

Therefore, when the lighting device A1 is installed in the facility space of the system ceiling S1, the existing ceiling panel 81 installed in the facility space can be used for indirect lighting. Moreover, since the ceiling panel 81 of the illumination device A1 can be arranged at a position higher than the support piece 800 of the T-bar 80, the illumination light emitted to the facility space through the opening 21 of the housing portion 2 can be directed to the ceiling panel 81. can be reflected to provide indirect illumination over a wider area.

The lighting device A1 also includes a restraining portion 40 (holding plate 4) that restrains the ceiling panel 81 placed on the placing portion 24 from being lifted. Therefore, since the lighting device A<b>1 suppresses lifting of the ceiling panel 81 by the suppressing portion 40 , the end portion 811 of the ceiling panel 81 can be prevented from coming off the mounting portion 24 . For example, even if the ceiling panel 81 rises due to an earthquake, the suppression unit 40 can suppress the lifting of the ceiling panel 81 and prevent the ceiling panel 81 from slipping and falling.

In addition, in the lighting device A1, the suppressing portion 40 (pressing plate 4) is configured to provide a gap between the suppressing portion 40 and the end portion 811 of the ceiling panel 81 placed on the placing portion 24. . Therefore, the lighting device A<b>1 can be mounted on the mounting portion 24 by inserting the end portion 811 of the ceiling panel 81 between the suppressing portion 40 and the mounting portion 24 . As a result, the lighting device A1 can improve the workability of installing the ceiling panel 81 .

In addition, since the illumination device A1 hides the T-bar 80 with the hidden plate 23 of the housing portion 2, the T-bar 80 cannot be seen through the equipment space. Therefore, by hiding the T-bar 80 with the hidden plate 23, the illumination device A1 can improve its external appearance.

Furthermore, in the lighting device A1, the light-transmitting panel 5 formed in a plate shape from a material capable of transmitting illumination light blocks at least a part of the opening 21 between the equipment space and the opening 21 of the housing portion 2. are arranged as Therefore, the lighting device A1 can emit the illumination light emitted from the light source unit 1 through the translucent panel 5 into the equipment space while suppressing foreign matter from entering the housing unit 2 through the opening 21.

Further, in the illumination device A1, the first mounting piece 140 of the mounting plate 14 is interposed between the second surface (lower surface) of the substrate 10 of the light source unit 1 and the bottom plate 20 of the housing unit 2, A substrate 10 is fixed to the first attachment piece 140 . For example, when the substrate 10 is directly fixed to the bottom plate 20 by screwing or the like, the screw heads are exposed on the surface (lower surface) of the bottom plate 20, which may deteriorate the external appearance. On the other hand, in lighting device A1, mounting plate 14 to which substrate 10 is fixed by a plurality of fixtures 15 is interposed between bottom plate 20 and fixtures 15 are not exposed on the surface (lower surface) of bottom plate 20. Therefore, deterioration in appearance of the bottom plate 20 can be suppressed.

Further, the illumination device A1 has a first accommodation portion 2A that accommodates the first light source portion 1A and a second accommodation portion 2A that accommodates the second light source portion 1B. The accommodating portion 2B is arranged along the longitudinal direction of the cross T-bar 80B. Therefore, the lighting device A1 can increase the illuminance in indirect lighting by emitting illumination light from two different directions into the equipment space.

(8) Summary The lighting device (A1; A2; A3) according to the first aspect of the present disclosure includes one or more light source units (1) and one or more housing units ( 2) and one or more supports (3). The housing part (2) is arranged in a space surrounded by a plurality of T-bars (80) that constitute the system ceiling (S1). The support (3) supports the housing (2) on the T-bar (80). The housing (2) has a bottom plate (20) facing the illumination space. The container (2) is provided with an opening (21) at least above the bottom plate (20). The accommodation part (2) accommodates the light source part (1) so that the illumination light is emitted toward the space through the opening (21).

The lighting device (A1; A2; A3) according to the first aspect includes one or more housing portions (2) housing one or more light source portions (1), which are supported by one or more support portions (3). It is supported by a T-bar (80), and the illumination light of the light source section 1 is emitted to the space (equipment space) through the opening (21) of the housing section (2). As a result, the lighting devices (A1; A2; A3) according to the first aspect perform indirect lighting with the illumination light emitted to the space (equipment space) when installed on the system ceiling (S1). can be done.

A lighting device (A1; A2; A3) according to the second aspect of the present disclosure can be realized by a combination with the first aspect. The lighting device (A1; A2; A3) according to the second aspect further comprises a mounting part (24) on which the end (811) of the ceiling panel (81) constituting the system ceiling (S1) is mounted. is preferred.

In the lighting device (A1; A2; A3) according to the second aspect, the ceiling panel (81) is placed on the T bar ( 80) at a position higher than the lower end (support piece 800). As a result, the illumination device (A1; A2; A3) according to the second aspect reflects the illumination light emitted into the space through the opening (21) to the ceiling panel (81), thereby indirectly illuminating a wider range. be able to.

A lighting device (A1) according to the third aspect of the present disclosure can be realized by a combination with the second aspect. It is preferable that the lighting device (A1) according to the third aspect further includes a restraining portion (40) that restrains the ceiling panel (81) placed on the placing portion (24) from rising.

The lighting device (A1) according to the third aspect can make it difficult for the edge (811) of the ceiling panel (81) to come off the mounting part (24) by suppressing the lifting of the ceiling panel (81). can.

A lighting device (A1) according to the fourth aspect of the present disclosure can be realized by a combination with the third aspect. In the lighting device (A1) according to the fourth aspect, it is preferable that the suppressing portion (40) faces the mounting portion (24) along the thickness direction of the ceiling panel (81). It is preferable that the suppressing portion (40) is configured to leave a gap between it and the end portion (811) placed on the placing portion (24).

In the lighting device (A1) according to the fourth aspect, the mounting portion (24) is inserted between the suppressing portion (40) and the mounting portion (24) by inserting the end portion (811) of the ceiling panel (81). ) can be rested with the end (811). As a result, the lighting device (A1) according to the fourth aspect can improve the workability of installing the ceiling panel (81).

The lighting device (A1) according to the fifth aspect of the present disclosure can be realized by combining with any one of the first to fourth aspects. The lighting device (A1) according to the fifth aspect preferably further comprises one or more hidden plates (23) that hide the T-bar (80) when viewed from the space.

The illumination device (A1) according to the fifth aspect can improve the external appearance by hiding the T-bar (80) with the hidden plate (23).

A lighting device (A1) according to the sixth aspect of the present disclosure can be realized by a combination with any one of the first to fifth aspects. In the lighting device (A1) according to the sixth aspect, it is preferable that the housing portion (2) further has a wall plate (22) rising upward from the bottom plate (20). The housing portion (2) preferably houses the light source portion (1) so as to be surrounded by the bottom plate (20) and the wall plate (22).

The illumination device (A1) according to the sixth aspect can reduce the illumination light directly emitted to the illumination space among the illumination light emitted from the light source section (1).

A lighting device (A1) according to the seventh aspect of the present disclosure can be realized by a combination with any one of the first to sixth aspects. The lighting device (A1) according to the seventh aspect preferably further includes a translucent panel (5). The light-transmitting panel (5) is preferably formed in a plate-like shape from a material that can transmit illumination light. The translucent panel (5) is preferably placed between the space and the opening (21).

In the lighting device (A1) according to the seventh aspect, the light-transmitting panel (5) can prevent foreign matter such as dust and insects from entering the housing portion (2).

The lighting device (A1) according to the eighth aspect of the present disclosure can be realized by a combination with the seventh aspect. In the lighting device (A1) according to the eighth aspect, the translucent panel (5) is preferably arranged so as to block at least part of the opening (21).

In the lighting device (A1) according to the eighth aspect, the translucent panel (5) blocks at least part of the opening (21), thereby further suppressing entry of foreign matter into the housing (2).

The lighting device (A1) according to the ninth aspect of the present disclosure can be realized by a combination with the seventh aspect. In the lighting device (A1) according to the ninth aspect, it is preferable that the translucent panel (5) is arranged to stand along the thickness direction of the bottom plate (20).

In the lighting device (A1) according to the ninth aspect, it becomes difficult for foreign matter to adhere to the surface of the translucent panel (5).

The lighting device (A1) according to the tenth aspect of the present disclosure can be realized by a combination with any one of the first to ninth aspects. In the lighting device (A1) according to the tenth aspect, the light source section (1) includes a rectangular substrate (10), a plurality of light emitting elements (LEDs 11) mounted on the first surface of the substrate (10), It is preferable to further have The light source part (1) comprises a mounting plate (14) interposed between the second surface of the substrate and the bottom plate (20), and one or more fixtures for fixing the substrate (10) to the mounting plate (14). It is preferable to further have (15).

The illuminating device (A1) according to the tenth aspect can suppress deterioration in appearance of the bottom plate (20) compared to the case where the substrate (10) is fixed to the bottom plate (20).

The lighting device (A1) according to the eleventh aspect of the present disclosure can be realized by a combination with any one of the first to tenth aspects. In the lighting device (A1) according to the eleventh aspect, it is preferable that the accommodation portion (2) includes a first accommodation portion (2A) and a second accommodation portion (2B). The first accommodating portion (2A) is preferably arranged along the longitudinal direction of the main T-bar (80A) among the plurality of T-bars (80). The second accommodation portion (2B) is preferably arranged along the longitudinal direction of the cross T-bar (80B) that intersects the main T-bar (80A) among the plurality of T-bars (80). The light source section (1) includes a first light source section (1A) housed in the first housing section (2A) and a second light source section (1B) housed in the second housing section (2B). is preferred.

The illumination device (A1) according to the eleventh aspect can increase the illuminance in indirect illumination by emitting illumination light into the space from two different directions.

A1;A2;A3 lighting device 1 light source section 1A first light source section 1B second light source section 2 housing section 2A first housing section 2B second housing section 3 support section 5 translucent panel 10 substrate 11 LED (light emitting element)
14 mounting plate 15 fixture 20 bottom plate 21 opening 22 wall plate 23 hidden plate 24 mounting portion 40 restraining portion 80 T-bar 80A main T-bar 80B cross T-bar 81 ceiling panel 800 support piece 811 end S1 system ceiling

Claims (11)

one or more light source units that emit illumination light;
one or more accommodation units that accommodate the light source unit and are arranged in a space surrounded by a plurality of T-bars that constitute the system ceiling;
one or more supports for supporting the housing on the T-bar;
with
The housing part has a bottom plate facing the illumination space, and an opening is provided at least above the bottom plate, and the light source part is configured so that the illumination light is emitted toward the space through the opening. to accommodate the
lighting device. Further comprising a mounting part on which the end of the ceiling panel that constitutes the system ceiling is mounted,
The lighting device according to claim 1 . further comprising a suppressing portion that suppresses lifting of the ceiling panel placed on the placing portion;
3. A lighting device according to claim 2. The suppressing portion faces the mounting portion along the thickness direction of the ceiling panel, and is configured to have a gap between it and the end portion that is mounted on the mounting portion.
4. A lighting device according to claim 3. further comprising one or more hidden plates that obscure the T-bar when viewed from the space;
The illumination device according to any one of claims 1-4. The housing portion further has a wall plate rising upward from the bottom plate, and houses the light source portion so as to be surrounded by the bottom plate and the wall plate.
The lighting device according to any one of claims 1-5. Further comprising a light-transmitting panel formed in a plate shape from a material capable of transmitting the illumination light, and disposed between the space and the opening;
The lighting device according to any one of claims 1-6. The translucent panel is arranged to block at least part of the opening,
8. A lighting device according to claim 7. The translucent panel is arranged to stand along the thickness direction of the bottom plate,
8. A lighting device according to claim 7. The light source unit
a rectangular substrate;
a plurality of light emitting elements mounted on the first surface of the substrate;
a mounting plate interposed between the second surface of the substrate and the bottom plate;
one or more fasteners for securing the substrate to the mounting plate;
further comprising
The lighting device according to any one of claims 1-9. The accommodation unit is
a first accommodating portion arranged along the longitudinal direction of the main T-bar among the plurality of T-bars;
a second accommodating portion arranged along the longitudinal direction of a cross T-bar crossing the main T-bar among the plurality of T-bars;
including
The light source unit
a first light source unit accommodated in the first accommodation unit;
a second light source unit accommodated in the second accommodation unit;
including,
The illumination device according to any one of claims 1-10.

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