lighting equipment

Abstract

To suppress leakage of light which has not been reflected at a ceiling or a side face from a light source.SOLUTION: A lighting device includes a shape material 30 having an installation plate part 31 on which a light source 20 is installed, a shield plate part 32 for shielding light from the light source 20, a base plate part 33 continuous to the shield plate part 32, and an attachment plate part 34 to be directly or indirectly attached to a construction. The shield plate part 32 includes a covered member 40 which extends toward the light source 20 side with respect to the installation plate part 31 or the base plate part 33 via an angular part from the base plate part 33, and arranged toward the light source side via the angular part from an extension end part of the shield plate part 32 at a lateral end of the shape material 30 on the side opposite the light source 20 of the shield plate part 32.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a lighting device that utilizes indirect lighting. [Background technology]

[0002] Indirect lighting is sometimes used as a lighting device for buildings. Indirect lighting irradiates light from a light source onto a ceiling or wall surface, and uses the reflected light as indirect light (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-183469 Summary of the Invention [Problem to be solved by the invention]

[0004] The lighting device using the above-mentioned indirect lighting is provided with a shielding portion so that light from the light source that has not been reflected by the ceiling or wall surface does not directly enter the field of view of users or residents of the building. However, there are cases where light from the light source leaks out from the end of the shielding portion on the wall surface side or from the joints between the shielding portions.

[0005] In order to solve the above problems, an object of the present invention is to suppress leakage of light from a light source that has not been reflected by a ceiling or wall surface. [Means for solving the problem]

[0006] The present invention is In the lighting device, A profile including an installation plate portion on which a light source is installed, a shielding plate portion that shields light from the light source, a base portion that is connected to the shielding plate portion, and a mounting plate portion that is directly or indirectly attached to a building, the shielding plate portion extends from the base portion via a corner portion toward the installation plate portion or the light source side of the base portion, A covering member is provided at the side end of the profile, on the side of the shielding plate portion facing the light source, from the extending end of the shielding plate portion toward the light source side via the corner portion. 、 A plurality of the profile members are arranged in series, The covering member is disposed across two adjacent shapes, A recessed groove is formed at the extending end of the shielding plate portion, and the end of the covering member is inserted into the recessed groove. It is characterized by the following. [Effects of the Invention]

[0007] In the present invention, the covering member is arranged at the lateral end of the profile, on the side of the shielding plate facing the light source, from the extending end of the shielding plate toward the light source via the corner. This makes it possible to effectively prevent light from leaking from the front surface of the shielding plate, which may be visible to people inside the building in which the lighting device is installed. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view showing the interior of a building in which a second ceiling surface extends to the end of the first ceiling surface on the second wall surface side. FIG. [Figure 2] 1 is a perspective view showing the interior of a building in which a second ceiling surface extends at a position spaced apart from a second wall surface of a first ceiling surface; [Figure 3] 3 is a perspective view showing a structure for forming a first ceiling surface or a second ceiling surface of the building shown in FIG. 1 or FIG. 2. FIG. [Figure 4] FIG. 2 is a side view of the lighting device of the first embodiment as viewed from the right. [Figure 5] 5 is an enlarged side view of the lighting device of FIG. 4. FIG. [Figure 6] FIG. 5 is a front view of the lighting device of FIG. [Figure 7] 5 is a front view of the wall-side end of the lighting device of FIG. 4. FIG. [Figure 8] FIG. 2 is a perspective view of a profile of the lighting device. [Figure 9] FIG. 9 is a perspective view of the profile seen from a different direction from that of FIG. 8. [Figure 10] FIG. 10 is a right side view showing the first step of the installation method of the lighting device. [Figure 11] 11 is a right side view showing a step following FIG. 10 in the method of installing the lighting device. [Figure 12] 12 is a right side view showing a step following FIG. 11 in the method of installing the lighting device. [Figure 13] FIG. 5 is a right side view showing an example of attaching a lighting device using a pre-attached member instead of the fixture shown in FIG. 4. [Figure 14] FIG. 10 is a side view of the lighting device of the second embodiment as viewed from the right. DETAILED DESCRIPTION OF THE INVENTION

[0009]

[0023] The following describes an embodiment of a lighting device according to the present invention with reference to the drawings. Note that the embodiment described below is merely an example of the present invention, and the present invention is not limited to the embodiment described below. Modifications can be made as appropriate within the scope of the technical concept of the present invention. The following embodiment shows a case where the lighting device according to the present invention is applied to indirect lighting (so-called cove lighting) using a ceiling surface, for example.

[0010] In the following embodiments, as shown in FIG. 1 or FIG. 2, lighting devices 10, 10A (see FIG. 4, FIG. 14) are illustrated as being installed on a second ceiling surface C2 side that is installed lower than a first ceiling surface C1 within a building. FIG. 1 illustrates the interior of a building in which a second ceiling surface C2 extends to the end of the first ceiling surface C1 on the second wall surface W2 side. FIG. 2 illustrates the interior of a building in which a second ceiling surface C2 extends from a first ceiling surface C1 at a position spaced apart from a second wall surface W2.

[0011] 1 and 2, for the sake of convenience in explaining the embodiment, the horizontal direction along the first wall surface W1 is referred to as the front-rear direction, and the horizontal direction along the second wall surface W2 is referred to as the left-right direction. The side of the second wall surface W2 relative to the first wall surface W1 is referred to as the "rear," and the opposite side is referred to as the "front." The side of the first wall surface W1 relative to the second wall surface W2 is referred to as the "left," and the opposite side is referred to as the "right." The first ceiling surface C1 and the second ceiling surface C2 are both horizontal surfaces, and the direction perpendicular to these ceiling surfaces C1 and C2 is defined as the vertical up-down direction.

[0012] In each embodiment described below, the lighting device 10, 10A will be described based on the directions shown in FIG. 1 or 2, on the assumption that the lighting device 10, 10A is installed in the building shown in these figures. In the embodiment described below, a case will be exemplified in which the lighting devices 10, 10A are provided along the left-right direction on the front end side of the second ceiling surface C2 in the building shown in FIG. 1 or FIG. In the case of the building shown in FIG. 2, the lighting devices 10, 10A may also be provided along the left-right direction on the rear end side of the second ceiling surface C2.

[0013] Here, FIG. 3 is a perspective view showing a structure 100 for forming the first ceiling surface C1 or the second ceiling surface C2 of the building shown in FIG. 1 or FIG. This structure 100 has multiple suspension bolts 110, hangers 120, sill supports 130, clips 140, and sills 150.

[0014] The siding support 130 and the siding 150 are, for example, lightweight steel frames with a predetermined length and a roughly U-shaped cross section. However, as long as sufficient rigidity can be ensured, the siding support 130 and the siding 150 may be made of non-ferrous metals, such as aluminum alloy profiles with the same cross section, or wood or resin profiles. Furthermore, the cross sections may be other shapes, such as roughly C-shaped, roughly M-shaped, roughly I-shaped, roughly H-shaped, roughly T-shaped, roughly L-shaped, or an open rectangular shape.

[0015] The plurality of sill supports 130 are arranged parallel to the same horizontal direction (for example, the front-to-rear direction) and at regular intervals in the direction perpendicular thereto (for example, the left-to-right direction). Each siding support 130 is supported at various locations in the front-to-rear direction by a plurality of hangers 120 suspended from above. The upper ends of the hangers 120 are fastened to the hanging bolts 110, and the lower ends are bent into a hook shape to support the siding support 130 from below. The upper end of the suspension bolt 110 is fixed by being embedded in or fastened to the ceiling surface of the building or a stronger structure provided on the ceiling surface side. The lower end of the suspension bolt 110 is threaded into a screw hole provided at the upper end of the hanger 120, and a pair of nuts clamps and fixes the hanger 120 from above and below, and the pair of nuts make it possible to adjust the position of the hanger 120 up and down.

[0016] The plurality of sills 150 are arranged parallel to the same horizontal direction (for example, the left-right direction) perpendicular to the sill support 130 and at regular intervals in the perpendicular direction (for example, the front-rear direction). Each siding 150 is fastened at multiple locations in the left-right direction by clips 140 supported by the siding support 130. The opening of each siding 150 faces upward in cross section, and the upper ends of both side walls are folded back to form a hook shape (see Figures 4 and 5). The clip 140 is structured to embrace the siding support 130 from above, and has a pair of locking claws at its lower end. The clip 140 is inserted inward through the opening of the siding 150, and the locking claws are inserted from below into the hook-shaped portions of the side walls on both sides to connect the siding 150 to the underside of the siding support 130.

[0017] Each joist 150 is supported by each joist support 130 with its bottom surface aligned on the same horizontal plane. A board material such as gypsum board is then attached to this horizontal surface to form the second ceiling surface C2. Similarly, the first ceiling surface C1 may be formed by a plurality of joists 150.

[0018] [First embodiment] Next, as a first embodiment, a lighting device 10 provided on the second ceiling surface C2 will be described. 4 is a side view of the lighting device 10 as seen from the right, FIG. 5 is an enlarged side view of the same, FIG. 6 is a front view, and FIG. 7 is a front view of the wall side end of the lighting device 10. A fixture W3, which forms a wall facing forward, is provided between the rear end of the first ceiling C1 and the front end of the second ceiling C2. This fixture W3 is a square pillar or square tube whose length in the left-right direction is equal to that of the second ceiling C2.

[0019] The lighting device 10 has an LED unit 20 as a light source, a frame 30, and a joint plate 40 as a covering member. The lighting device 10 is provided on the front end side of the second ceiling surface C2, extending over substantially the entire length of the second ceiling surface C2 in the left-right direction.

[0020] [LED unit] The LED unit 20 includes an LED element 21, a circuit board (not shown), and a diffusion lens 22. The LED unit 20 may be configured to have one LED element 21, or may be configured to have a plurality of LED elements 21 arranged in a row. In the case of a configuration having one LED element 21, a plurality of LED units 20 are arranged side by side in the left-right direction on the profile 30 at regular intervals. In the case of a configuration having a plurality of LED elements 21, the LED unit 20 is provided on the shaped member 30 with the arrangement direction of the LED elements 21 facing the left-right direction. If the LED unit 20 is shorter than the shaped member 30, the plurality of LED units 20 may be arranged in series with respect to the shaped member 30. In either case, the LED element 21 is arranged facing upward on the frame 30. The orientation of the LED element 21 is not limited to facing upward, and the LED element 21 may be arranged facing in another direction.

[0021] The circuit board has a drive circuit (power supply circuit, dimming circuit, etc.) for the LED elements 21 formed thereon. The diffusion lens 22 is provided above the LED element 21 and diffuses the light emitted from the LED element 21. The diffusion lens 22 may be long enough to accommodate a plurality of LED elements 21. Alternatively, a diffusion plate may be used instead of the diffusion lens 22.

[0022] [Shape] FIG. 8 is a perspective view of the section 30, and FIG. 9 is a perspective view of the section 30 seen from a different direction. As shown in FIGS. 4 to 9, the frame 30 has an installation plate portion 31, a shielding plate portion 32, a base plate portion 33, and an attachment plate portion 34, which are integrally formed. The installation plate portion 31 has the LED unit 20 installed thereon. The shielding plate portion 32 extends in the vertical direction and blocks light that is directly emitted from the LED unit 20 into the room. The base plate portion 33 is located at the bottom of the profile 30 and is connected to the shielding plate portion 32. The mounting plate 34 is indirectly attached to the building via a structure 100, fixture W3, or the like, and fixes the entire lighting device 10. The mounting plate 34 may also be directly attached to a wall surface or the like within the building.

[0023] The extrusion 30 has an end face shape that is uniformly continuous in the left-right direction (longitudinal direction) when viewed from the right side as shown in Figures 4 and 5. The extrusion 30 is formed, for example, by extruding an aluminum alloy so that the end face shape that is uniformly continuous in the left-right direction when viewed from the right side as shown in Figures 4 and 5. However, strictly speaking, any of the installation plate 31, the shielding plate 32, the base plate 33, and the mounting plate 34 may have a protrusion, a recess, or a through-hole in the thickness direction of the flat plate.

[0024] The section 30 may be made of a material other than aluminum alloy, such as a lightweight metal material or resin, as long as sufficient rigidity can be ensured. However, it is preferable that the section 30 be made of a material that also meets the demand for lightweight construction. Furthermore, the shape member 30 may be formed by other methods than extrusion.

[0025] A plurality of the frame members 30 are arranged in series over substantially the entire length of the second ceiling surface C2 in the left-right direction. It is also possible to use a single section 30 having the same overall length in the left-right direction of the second ceiling surface C2. However, when considering manufacturability and transportability, it is more advantageous to use multiple sections 30 of shorter length (for example, about 1 to 2 m) lined up in series.

[0026] The mounting plate portion 34 of the profile 30 is integrally connected to the installation plate portion 31 over the entire length in the left-right direction. That is, the mounting plate portion 34 extends upward (away from) the installation plate portion 31. The mounting plate 34 is a rectangular flat plate that is attached to the lower front end of the fixture W3, which is the target of the attachment, while being oriented parallel to the up-down and left-right directions. The left-right length of the mounting plate 34 is equal to the overall length of the other parts of the section 30. The mounting plate portion 34 has a first groove 341 of a predetermined width and a second groove 342 narrower than the first groove 341 formed along the left-right direction at the upper end of the front surface. The mounting plate 34 is flat and has no projections or recesses on the entire surface except for the first groove 341 and the second groove 342, and its upper end portion extends straight upward. That is, the mounting plate 34 is flat and extends upward, with no projections on its front or rear surfaces up to its upper end.

[0027] The mounting plate 34 is fixed to the fixture W3 by screws 91. The screws 91 used at that time are, for example, flat head screws, tapping screws, drill screws, or the like. The first groove 341 has a vertical width slightly wider than the outer diameter of the head of the screw 91. The second groove 342 has a vertical width sufficiently narrower than that of the first groove 341 and is located in the vertical center of the inner bottom of the first groove 341. The screw 91 is positioned in the second groove 342 from the front side of the mounting plate portion 34 and screwed in, and after fastening to the fixture W3, the head is accommodated within the first groove 341 and does not protrude forward.

[0028] The installation plate 31 has a first leg 311, a second leg 312, and a base 313. The base 313 is located above the substrate 33 via the first leg 311 and the second leg 312 which stand upright from the upper surface of the substrate 33. In other words, the base 313 is located closer to (above) the substrate 33 in the extension direction of the shielding plate 32 which will be described later.

[0029] The base portion 313 is a rectangular flat plate that is parallel in the front-rear and left-right directions, and its rear end is uniformly and integrally connected to the lower end of the mounting plate portion 34. The length of the base portion 313 in the left-right direction is equal to the overall length of the other parts of the section 30. A right-angled corner is formed over the entire length in the left-right direction between the rear end of the base portion 313 and the lower end of the mounting plate portion 34. However, the corner is not limited to a right angle. The upper surface of the base 313 is an installation area for the LED unit 20. The LED unit 20 is fixed by bonding, adhesive tape, screws, or the like, slightly forward of the corner where the base 313 meets the mounting plate 34 on the upper surface of the base 313. Alternatively, a concave-convex structure such as a claw may be provided between the base 313 and the LED unit 20, and the LED unit 20 may be fixed by fitting the convex and concave portions together.

[0030] 8, the base 313 has a plurality of through-holes 317 formed in a line in the left-right direction, penetrating vertically, for connecting wiring to the LED unit 20 from below and for heat dissipation. Because each through-hole 317 is formed behind the second leg 312, it is more advantageous for heat dissipation than the area between the first leg 311 and the second leg 312. Furthermore, weight reduction can be expected by removing material.

[0031] The first leg 311 and the second leg 312 are both rectangular flat plates that are parallel in the up-down and left-right directions. The left-right lengths of the first leg 311 and the second leg 312 are equal to the overall lengths of the other parts of the section 30.

[0032] The rear surface of first leg portion 311 is integrally connected near the upper end to the front end of base portion 313. The upper end of first leg portion 311 protrudes slightly upward beyond base portion 313. However, this upper end does not have to protrude. The lower end of the first leg portion 311 is integrally connected to the upper surface of the base portion 33 over the entire length in the left-right direction.

[0033] Furthermore, a convex ridge 314 that convexly faces forward is formed over the entire length in the left-right direction on the front surface near the lower end of the first leg 311. This convex ridge 314 is close to the upper surface of the base plate 33, and a concave groove that is concave toward the rear is formed between the convex ridge 314 and the base plate 33. An end portion of a joint plate 40 (described later) extending toward the rear is inserted into this concave groove, and it functions as a locking groove that locks the joint plate 40. The vertical width of this concave groove is a width that allows the joint plate 40 to be inserted, for example, approximately the thickness of the joint plate 40 (for example, 1 to several mm).

[0034] Although the convex rib portion 314 is formed over the entire length of the first leg portion 311 in the left-right direction, the present invention is not limited to this and it is sufficient that the convex rib portion 314 fulfills the function of locking the joint plate 40. Therefore, the convex rib portion 314 may be configured to be provided on the left and right ends of the profile 30 in a range that is at least half the left-right width of the joint plate 40. More preferably, the convex rib portion 314 may be configured to be provided on the left and right ends of the profile 30 in a range that is equal to the left-right width of the joint plate 40.

[0035] The upper end of the second leg 312 is integrally connected to a portion slightly forward of the center in the front-rear direction on the underside of the base 313. The second leg 312 may also be provided further rearward. The lower end of the second leg portion 312 is integrally connected to the upper surface of the base portion 33 over the entire length in the left-right direction.

[0036] The base plate 33 is a rectangular flat plate that is parallel in the front-rear and left-right directions. The length of the base plate 33 in the left-right direction is equal to the overall length of the other parts of the section 30. The rear end of the base plate 33 extends rearward beyond the second leg 312 and further rearward beyond the mounting plate 34. A first groove 331 is formed in the left-right direction on the underside of the extended rear end of the base plate 33, and a second groove 332 is formed in the left-right direction at the center of the inner bottom of the first groove 331. Both the first groove 331 and the second groove 332 are concave upward. The base plate portion 33 is fastened to the underside of the joist 150 on the second ceiling surface C2 side via a gypsum board PB3 as the board material by screws 91 of the same type as those used for the mounting plate portion 34 being screwed in from below. The first and second grooves 331, 332 on the lower surface of the base plate portion 33 have the same structure and function as the first and second grooves 341, 342 on the attachment plate portion .

[0037] The rear end of the base plate portion 33 extends rearward beyond the second leg portion 312 and further rearward beyond the mounting plate portion 34. Therefore, the work of attaching the shaped member 30 can be performed with the front end of the gypsum board PB3 placed on the upper surface of the base plate portion 33. Furthermore, the gypsum board PB3 can be fastened together with the shaped member 30, allowing the work of attaching the lighting device 10 to be performed smoothly and efficiently.

[0038] The front end of the base plate 33 extends further forward than the first leg 311 of the installation plate 31 and is integrally connected to the rear surface of the shielding plate 32 . With this structure, a step is formed between the base plate 33 and the base portion 313 of the installation plate 31, with the base plate 33 side being lower. In addition, a recessed groove that is recessed downward is formed between the shielding plate 32 and the first leg portion 311 over the entire length in the left-right direction.

[0039] A recessed region 333 that is recessed downward over the entire length in the left-right direction is formed on the upper surface of the base portion 33 between the first leg portion 311 and the second leg portion 312. The thickness of this recessed region 333 is thinner than other parts of the base portion 33. The portion of the base portion 313 that faces the recessed region 333 also has a thickness thinner than other parts of the base portion 313. The recessed region 333 has high rigidity due to the square pipe structure surrounded on all four sides by the first leg 311, the second leg 312, the base 313, and the base plate 33. Therefore, sufficient rigidity can be ensured even if the plate thickness of the base 313 and the recessed region 333 is thin, and the weight of the extrusion 30 is reduced by reducing the plate thickness.

[0040] The shielding plate portion 32 is located at the frontmost side of the profile 30. The shielding plate 32 has an upper shielding portion 321 extending upward (toward the LED unit 20 relative to the base 313 or the substrate 33) via a right-angle or approximately right-angle corner from the substrate 33, and a hanging portion 322 as a protrusion protruding downward (toward the opposite side from the extending direction of the upper shielding portion 321) from the substrate 33. The corner of the shielding plate 32 relative to the substrate 33 is illustrated as being right-angled, but is not limited to this and may be at an angle.

[0041] The upper shielding portion 321 is a rectangular flat plate that is parallel in the up-down and left-right directions, and its length in the left-right direction is equal to the overall length of the other portions of the frame 30. The hanging portion 322 is also a rectangular flat plate that is parallel in the up-down and left-right directions, and its length in the left-right direction is equal to the overall length of the other portions of the frame 30. The front surfaces of upper shielding portion 321 and hanging portion 322 are flush and connected to each other, but hanging portion 322 has a greater thickness in the front-to-rear direction.

[0042] The upper shielding portion 321 is set so that at least its upper end (extending end) is higher than the upper end (upper surface of the diffusing lens 22) of the LED unit 20 on the base portion 313. This is to prevent the diffused light of the LED unit 20 from directly entering the field of view when viewed from the front of the shielding plate portion 32. If the lighting device 10 is installed at a position that is clearly higher than the line of sight of people, the height of the upper end of the upper shielding portion 321 may be slightly lower than the upper end of the LED unit 20.

[0043] A folded piece 323 folded back at a right angle to the rear is formed over the entire length in the left-right direction at the upper end of the upper shielding part 321. Furthermore, a convex rib part 324 that is convex downward is formed over the entire length in the left-right direction at the rear end of the lower surface of the folded piece 323. The upper shielding portion 321, the folded piece 323, and the protruding rib portion 324 form a recessed groove that is recessed upward. An end portion of the joint plate 40 (described later) extending upward is inserted into this recessed groove, and the recessed groove functions as a locking groove that locks the joint plate 40. In this case as well, the vertical width of the recessed groove is a width that allows the joint plate 40 to be inserted, for example, approximately the thickness of the joint plate 40 (for example, 1 to several mm).

[0044] Although the folded pieces 323 and the protruding ribs 324 are formed over the entire length in the left-right direction of the frame 30, the present invention is not limited to this and may be formed as long as they function to lock the joint plate 40. Therefore, the folded pieces 323 and the protruding ribs 324 may be provided at the left and right ends of the frame 30 in a range that is at least half the left-right width of the joint plate 40. More preferably, the folded pieces 323 and the protruding ribs 324 may be provided at the left and right ends of the frame 30 in a range that is equal to the left-right width of the joint plate 40.

[0045] As described above, hanging portion 322 has a flat plate shape with no irregularities below base portion 33, and its lower end extends straight downward. In other words, hanging portion 322 extends downward and has a flat plate shape with no protrusions or recesses on its front or back surfaces down to its lower end. Therefore, the width of lower end surface 322a of hanging portion 322 in the front-rear direction can be set to the minimum width equal to the plate thickness.

[0046] When lighting device 10 is installed on second ceiling surface C2, lower end surface 322a of hanging portion 322 is within the field of view of people and can be easily visually recognized unless covered with a separate member. Even in such a case, the width of lower end surface 322a of hanging portion 322 is minimized, so that second ceiling surface C2 and lighting device 10 can be kept high without impairing the design thereof.

[0047] Furthermore, hanging portion 322 can be used to position the front end of gypsum board PB4 when attaching gypsum board PB4 as a board material to the underside of substrate portion 33. Therefore, hanging portion 322 can improve the workability of installing lighting device 10 and its surroundings. 4 and 5 show an example in which the downward protruding length of hanging portion 322 is longer than the thickness of gypsum board PB4. However, the downward protruding length of hanging portion 322 is not limited to this, and may be equal to or shorter than the thickness of gypsum board PB4.

[0048] [Joint plate] As described above, when multiple extrusions 30 are installed in series in the left-right direction, the attachment work is performed by butting the left-right (lateral) ends of adjacent extrusions 30 together. Also, the attachment work is performed by butting one end of the extremity-most extrusion 30 among the multiple extrusions 30 against the opposing wall surface (for example, the first wall surface W1). In these cases, gaps are likely to occur between the ends of adjacent members 30 and between one end of a member 30 and the wall surface.

[0049] For this reason, as shown in FIGS. 6 and 7, a joint plate 40 is attached to the rear surface (the surface on the LED unit 20 side) of the shielding plate portion 32. That is, the joint plate 40 is attached to the rear side of the shielding plate portion 32 so as to span from the opposing end to the end of the adjacent section members 30 . In the case of the section 30 located at the very end, a joint plate 40 is attached to the rear side of the shielding plate portion 32 so as to abut against the wall surface opposite the end portion on the wall side.

[0050] Any material may be used for the joint plate 40 as long as it has light-blocking properties. However, the upper end of the joint plate 40 is inserted into the recessed groove formed by the convex rib portion 324 at the upper end of the upper shielding portion 321, and the rearward extending end is inserted into and locked in the recessed groove formed by the convex rib portion 314 at the lower end of the first leg portion 311. In this case, the joint plate 40 may be L-shaped in a side view, having a vertical plate portion 41 and a horizontal plate portion 42 that contact the rear surface of the upper shielding portion 321 and the top surface of the base plate portion 33, respectively.

[0051] In particular, when the joint plate 40 is made of a hard material (metal or the like) that is difficult to deform, the joint plate 40 is formed in an L-shape when viewed from the side. When attaching the joint plate 40 made of a hard material to the profile 30, it is inserted from the left and right ends of the profile 30 into the groove at the lower end of the first leg 311 of the groove at the upper end of the upper shielding part 321.

[0052] [Installation of lighting equipment] A method for installing the lighting device 10 will be described with reference to the drawings. Figures 10 to 12 are right side views showing the installation method for the lighting device 10 in the order of steps. After the step in Figure 12, the installation is completed through the step shown in Figure 4.

[0053] FIG. 10 shows the structure 100 constituting the first ceiling surface C1 and the structure 100 constituting the second ceiling surface C2 before the lighting device 10 is attached. The high-position structure 100 and the gypsum boards PB1 and PB2 as board materials form a first ceiling surface C1. The gypsum boards PB1 and PB2 are attached to the lower surface of each joist 150 of the structure 100 by, for example, screws in a state where they are stacked one on top of the other. The lower structure 100 forms a second ceiling surface C2. A fixture W3 forming a side wall is provided between the rear end of the structure 100 on the first ceiling surface C1 and the front end of the structure 100 on the second ceiling surface C2. The fixture W3 may be fixed to the upper and lower structures 100 by screws, adhesive, or the like.

[0054] Next, as shown in FIG. 11, the worker attaches the shape member 30 of the lighting device 10 to the structure 100 and fixture W3 that constitute the second ceiling surface C2. The upper surface of the appropriately positioned gypsum board PB3 is placed against the underside of each rough joist 150 of the structure 100. Furthermore, the rear ends of the base plates 33 of the multiple extrusions 30 are placed against the underside of the front ends of the gypsum board PB3 and pressed down from below.

[0055] Then, screws 91 are fastened from below into the first groove 331 and the second groove 332 at the rear end of the base plate 33 of each extrusion 30. This fixes the base plate 33 of each extrusion 30 to the underside of the foremost rough frame 150 via the gypsum board PB3. Additionally, screws 91 are fastened from the front into the first groove 341 and the second groove 342 at the upper end of the mounting plate portion 34 of each frame 30. This fixes the mounting plate portion 34 of each frame 30 to the lower front surface of the fixture W3.

[0056] Furthermore, when each of the frame members 30 is attached, a joint plate 40 is attached to the end of the frame member 30 facing the wall surface (for example, the first wall surface W1) and to the boundary between the adjacent frame members 30. The upper end of the joint plate 40 is inserted into the groove at the upper end of the upper shielding portion 321, and the rearward extending end is inserted into the groove at the lower end of the first leg portion 311. This allows the joint plate 40 to shield the boundary between the section members 30, including the corner formed by the upper shielding portion 321 and the base portion 33.

[0057] Furthermore, when attaching the joint plate 40 to the end of the section 30 facing the wall surface, the joint plate 40 is attached while butting against the wall surface. When attaching the joint plate 40 to the boundary between adjacent sections 30, the joint plate 40 is attached so as to close the gap at the boundary. In either case, the joint plate 40, which has been properly positioned to prevent misalignment, may be fixed to the section 30 by adhesive or the like.

[0058] Next, as shown in FIG. 12, the worker attaches the plasterboard PB4 to the structure 100 that constitutes the second ceiling surface C2. The worker positions the gypsum board PB4 in the front-to-rear direction by abutting the front end of the gypsum board PB4 against the rear surface of the hanging part 322 of the shielding plate part 32 of the frame 30. Then, the upper surface of the gypsum board PB4 is placed against the underside of the base plate portion 33 of the extrusion 30, and the screw 91 is fastened from below. Because the base portion 313 of the installation plate portion 31 is higher than the base plate portion 33, the length of the screw 91 can be appropriately selected to fit between the base portion 313 and the base plate portion 33. This makes it possible to prevent the screws 91 from reaching the upper surface of the substrate portion 33 and damaging the LED unit 20, and to prevent the shadows of the screws 91 from affecting lighting.

[0059] Next, as shown in FIGS. 4 and 5, the worker attaches the gypsum board PB5 to the mounting plate portion 34 of each frame member 30 and the front side of the fixture W3. The worker presses the rear surface of the gypsum board PB5 against the front surface of the mounting plate portion 34, and fastens the screw 91 from the front side of the gypsum board PB5 toward the front surface of the fixture W3. Furthermore, the LED unit 20 is attached to the base portion 313 of the installation plate portion 31 of each extrusion 30. The LED unit 20 is fixed by any method such as pasting with adhesive tape, bonding, or screwing, with its rear surface pressed against the front side of the gypsum board PB5. In addition, wiring for the LED unit 20 is routed through each through-hole 317 of the base portion 313. The LED unit 20 may be attached to the profile 30 before the profile 30 is attached to the structure 100 or the like. By carrying out the above steps, the installation of the lighting device 10 is completed.

[0060] [Technical effect of the first embodiment] The lighting device 10 has a joint plate 40 that extends rearward from the upper end of the shielding plate portion 32 at the end of the profile 30, along the upper surface of the base portion 33 via a corner portion on the rear side of the shielding plate portion 32. In this way, the joint plate 40 is arranged along the corners of the shielding plate 32 and the base plate 33. This makes it possible to effectively prevent light from leaking from the front surface of the shielding plate 32, which may be visible to people inside the building.

[0061] For example, it is possible to prevent leakage of light from the LED unit 20 by using a joint plate aligned with the shielding plate portion 32 and a joint plate aligned with the base portion 33. However, the light from the LED unit 20 may be reflected at various parts of the profile 30. For this reason, the light from the LED unit 20 is deflected and passes between the two joint plates, making it impossible to sufficiently prevent leakage to the front side of the shielding plate portion 32. In this case, a member such as a decorative plate that covers the entire front surface of the shielding plate portion 32 is required. In contrast, the joint plate 40 also shields the corners, thereby suppressing leakage of light from the LED unit 20. Accordingly, the shaped member 30 does not require a decorative panel to cover the front surface of the shielding plate portion 32, which makes it possible to reduce the weight of the entire lighting device 10.

[0062] Furthermore, the lighting device 10 includes a plurality of members 30 arranged in series, as shown in FIG. 6, and a joint plate 40 is disposed across two adjacent members 30. Therefore, the joint plate 40 covers the joints between the members 30 where light from the LED units 20 is likely to leak, making it possible to more effectively suppress leakage of light forward.

[0063] In addition, in the lighting device 10, as shown in FIG. 7, a joint plate 40 is also disposed at the end of the frame 30 on the wall side. Therefore, the joint plate 40 covers the gap between the profile 30 and the wall, through which light from the LED unit 20 is likely to leak, and can more effectively suppress leakage of light forward.

[0064] Furthermore, in lighting device 10, hanging portion 322 of shielding plate portion 32 is flat and has no protrusions on the front or back surfaces up to its lower end. Therefore, the lower end surface of hanging portion 322 can have a width equal to the plate thickness of hanging portion 322. Due to its position, the lower end surface of hanging portion 322 is easily visible to people from below. Therefore, by making the width of the lower end surface of hanging portion 322 the same as the plate thickness as described above, it is possible to minimize the impact on appearance. This makes it possible to maintain a high level of design appeal when viewed from below of lighting device 10.

[0065] Furthermore, in the lighting device 10, the mounting plate 34 is generally flat, with no protrusions on its front or back surfaces, even up to the upper end. This avoids the need for a height adjustment unit or the like on the mounting plate 34, making it possible to simplify the structure and reduce the weight of the extrusion 30. Furthermore, although the mounting plate 34 does not have a height adjustment function, its flat shape and simple structure reduce restrictions on the external mounting position, making it possible to achieve freedom in layout and flexible adjustment of the installation height by adjusting the mounting position.

[0066] Furthermore, since the installation plate portion 31 of the profile 30 is higher than the base plate portion 33, the structure is suitable for attaching a board material or the like to the underside of the base plate portion 33. For example, even when the plasterboard PB4 is screwed to the underside of the substrate part 33, the screws 91 are prevented from reaching the upper surface of the substrate part 33. This prevents the screws 91 from damaging the LED unit 20 and prevents the shadows of the screws 91 from affecting lighting.

[0067] [Use of pre-attached material] In the above-described lighting device 10 (as well as the lighting device 10A described later), an example is shown in which the mounting plate portion 34 is mounted to the fixture W3, but the present invention is not limited to this. The lighting device 10 can be easily attached to any member or structure to which the mounting plate portion 34 and the base plate portion 33 of the profile 30 can be attached. For example, as shown in FIG. 13, it is also possible to use a pre-attached material W4 in place of the fixture W3.

[0068] The tip member W4 has a base portion to be attached to the upper structure 100 and a hanging portion hanging downward from the base portion. The tip material W4 has an inverted L-shaped end face shape that is uniformly continuous in the left-right direction, which is the end face shape when viewed from the right side as shown in Fig. 13. The tip material W4 is also formed, for example, by extrusion processing of an aluminum alloy or other lightweight metal, so that its end face shape is uniformly continuous in the left-right direction.

[0069] The base portion of the leading material W4 is a rectangular flat plate that is attached to the underside of the rearmost sill 150 of the upper structure 100 in a state where it is oriented parallel to the front-to-back and left-to-right directions. The hanging part of the front-attached member W4 is a rectangular flat plate that is connected to the front end of the base member in a state where it is parallel to the vertical and horizontal directions. The hanging part is formed at approximately the same height as the fixture W3. The length in the left-right direction of the base portion and the hanging portion is equal to the overall length of the frame 30.

[0070] The base end of the tip material W4 is attached to the underside of the siding 150 by a method that provides sufficient attachment strength, such as screwing. When screwing, a tapping screw or a flat head screw drill screw, such as the screw 91 described above, may be used, or a flat-head screw with a flat tip, such as the screw 92 shown in FIG. 13, may be used. When using the screw 92, a screw insertion hole may be provided at the base end, and a female screw hole may be provided on the sill 150 side, so that the screw 92 can be fastened from below.

[0071] Furthermore, since the mounting plate portion 34 of the profile 30 is attached to the hanging portion of the leading member W4, it is preferable to use a screw 92 rather than a screw 91. In this case, a screw insertion hole may be provided in the hanging portion, and a female screw hole may be provided on the mounting plate portion 34 side, and the screw 92 may be fastened from the rear. Alternatively, a female screw hole may be provided in the hanging portion, and a screw insertion hole may be provided on the mounting plate portion 34 side, and the screw 92 may be fastened from the front.

[0072] As described above, the base portion 33 of the shaped member 30 is fastened to the underside of the joist 150 of the lower structure 100 with screws 91. However, these structures 100 are not limited to those having the joist 150, and other structures to which the base portion 33 of the shaped member 30 can be attached may also be used. It is also possible to install the lighting device 10 by attaching the shaped member 30 directly to the ceiling or wall surface of a concrete floor.

[0073] [Second embodiment] A lighting device 10A according to the second embodiment will be described with reference to Fig. 14. Fig. 14 is a side view of the lighting device 10A as viewed from the right.

[0074] This lighting device 10A includes a shaped member 30A having a structure different from the above-described shaped member 30. In addition, in the lighting device 10A, the same components as those in the above-described lighting device 10 are denoted by the same reference numerals, and redundant explanations will be omitted, and only the differences from the lighting device 10 will be explained.

[0075] The section 30A differs from the section 30 in that not only the base plate portion 33 but also the installation plate portion 31A is connected to the shielding plate portion 32. The material and method for forming the section 30A are the same as those for the section 30.

[0076] The installation plate portion 31A has a second leg portion 312 and a base portion 313A. The front end of the base 313A extends further forward than the base 313 described above, and is connected to the rear surface of the shielding plate 32. Therefore, the rear surface of the shielding plate 32 is divided into two, upper and lower, by the base 313A. In addition, since the front end of the base portion 313A is connected to the rear surface of the shielding plate portion 32, the strength is ensured by the shielding plate portion 32, so the structure corresponding to the first leg portion 311 described above is omitted.

[0077] In accordance with the structure of the base portion 313A, the lighting device 10A has joint plates 43A and 44A arranged at each corner connecting the shielding plate portion 32 to the base portion 313A of the installation plate portion 31A and at each corner connecting the shielding plate portion 32 to the base portion 33.

[0078] That is, ridge portion 315A protrudes upward from the upper surface of base portion 313A and extends from the upper end thereof forward along the entire length in the left-right direction. This ridge portion 315A is close to the upper surface of base portion 313A, and a recessed groove recessed toward the rear is formed between ridge portion 315A and base portion 313A. At the end of the profile 30A, the upper end of the joint plate 43A is inserted into the recessed groove at the upper end of the shielding plate 32, and the rearward extending end is inserted into the recessed portion on the upper surface of the base 313A. Therefore, the joint plate 43A integrally covers the area along the rear surface of the shielding plate 32 from its upper end to the corner with the base 313A, and the area along the upper surface of the base 313A from the corner to the protruding strip 315A. In this case, the joint plate 43A has an L-shape in side view, following the corner between the shielding plate portion 32 and the base portion 313A within the above range.

[0079] Furthermore, a convex ridge 316A protrudes downward from the underside of base 313A and extends forward from its lower end over the entire length in the left-right direction. This convex ridge 316A is located close to the underside of base 313A, and a recessed groove that is recessed rearward is formed between convex ridge 316A and base 313A. Furthermore, on the upper surface of the base plate 33, directly below the protruding ridge 316A, a protruding ridge 314A is formed over the entire length in the left-right direction, protruding upward from the upper surface of the base plate 33 and extending forward from its upper end. The protruding ridge 314A is located close to the upper surface of the base plate 33, and a recessed groove recessed toward the rear is formed between the protruding ridge 314A and the base plate 33. One end of the joint plate 44A is inserted into the groove formed by the ridge portion 316A at the end of the section 30A, and the other end is inserted into the groove formed by the ridge portion 314A of the base plate portion 33. Therefore, the joint plate 44A is aligned with the lower surface of the base portion 313A, the rear surface of the shielding plate portion 32, and the upper surface of the base portion 33, and integrally covers the area from the protruding portion 316A to the protruding portion 314A. In this case, the joint plate 44A has a U-shape in side view, following the corners between the shielding plate 32 and the base 313A and the corners between the shielding plate 32 and the base 33 within the above range. When a plurality of the sections 30A are arranged in series, the "ends of the sections 30A" where the joint plates 43A and 44A are provided refer to positions extending from end to end of two adjacent sections 30A. Also, when one end of the section 30A faces a wall, the "end" refers to the end.

[0080] As described above, in the lighting device 10A, the installation plate 31A and the substrate 33 are both connected to the shielding plate 32. Furthermore, joint plates 43A and 44A are disposed at both the corners where the shielding plate 32 connects to the installation plate 31A and the corners where the shielding plate 32 connects to the substrate 33. Therefore, in the lighting device 10A, the installation plate 31A and the substrate 33 are connected to the shielding plate 32, which makes it possible to significantly improve the rigidity of the profile 30A. Furthermore, it becomes possible to effectively suppress light leakage while improving the rigidity of the profile 30A. Furthermore, the profile 30A does not require a decorative panel, making it possible to reduce the weight of the entire lighting device 10A.

[0081] [others] The above describes the embodiments of the present invention. However, the present invention is not limited to the above embodiments. For example, in the embodiments, a component integrally formed from a single member may be replaced with a component divided into multiple members that are connected or fixed to each other. Furthermore, a component formed by connecting multiple members may be replaced with a component integrally formed from a single member. In addition, the details shown in the embodiments may be modified as appropriate without departing from the spirit of the invention.

[0082] Although the above-described lighting devices 10 and 10A have been illustrated with the shielding plate portion 32 extending upward, the extending direction is not limited to this. The shielding plate portion 32 may extend in any direction as long as it can block direct light from the LED unit 20 so that it cannot be seen from inside the building.

[0083] Furthermore, in the above-described profile 30, the mounting plate portion 34 may hang down below the base portion 313 and be connected to the upper surface of the base portion 33. In this case, the rear end of the base portion 313 may be connected to the mounting plate portion 34, or may be connected to the upper surface of the base portion 33 by legs such as the first and second legs 311, 312 just before the mounting plate portion 34.

[0084] Furthermore, in the above-described profile 30, the installation plate portion 31 may be removed, and the base plate portion 33 may function as the installation plate portion. In this case, the mounting plate portion 34 hangs down further and connects to the upper surface of the base plate portion 33. The LED unit 20 is also disposed on the upper surface of the base plate portion 33. In this case, however, the screws 91 for attaching the plasterboard PB4 must avoid the LED unit 20. [Explanation of symbols]

[0085] 10,10A lighting equipment 20 LED unit (light source) 21 LED elements 30,30A Shape 31,31A Installation plate part 311 First leg 312 Second leg 313,313A Base 314,315A,316A Convex part 32 Shielding plate part 321 Upper shielding section 322 Drooping part (projecting part) 322a Lower end surface 323 Folded piece 324 Convex strip 33 Circuit board section 333 Concave area 34 Mounting plate 40, 43A, 44A Joint plate (covering member) 41 Vertical plate section 42 Horizontal plate part 91,92 Screws 100 structures 130 Noenuke 150 Rinkai C1 First ceiling surface C2 Second ceiling surface PB1~PB5 gypsum board W1 First wall W2 Second wall W3 Construction W4 Pre-attached material

Claims

1. A profile including an installation plate portion on which a light source is installed, a shielding plate portion that shields light from the light source, a base portion that is connected to the shielding plate portion, and a mounting plate portion that is directly or indirectly attached to a building, the shielding plate portion extends from the base portion via a corner portion toward the installation plate portion or the light source side of the base portion, At the side end of the profile, a covering member is provided on the side of the shielding plate portion facing the light source, from the extended end of the shielding plate portion toward the light source side via the corner portion, A plurality of the profile members are arranged in series, The covering member is disposed across two adjacent shapes, An illumination device characterized in that a recessed groove that is recessed upward is formed on the extending end of the shielding plate portion, and an end of the covering member is inserted into the recessed groove.

2. The lighting device according to claim 1 , wherein the covering member is disposed on an end of the profile member on the wall side.

3. The lighting device according to claim 1, wherein the shielding plate portion has a protruding portion that protrudes from the base portion on the opposite side to the extended end portion, and the protruding portion is flat up to its tip.

4. The lighting device according to claim 1, characterized in that the mounting plate portion is connected to the installation plate portion or the base plate portion, extends in a direction away from the installation plate portion or the base plate portion, and is flat up to its extended end.

5. The lighting device according to claim 1 , wherein the installation plate portion is located closer to the base plate portion in the extending direction of the shielding plate portion.

6. the installation plate portion and the base plate portion are both connected to the shielding plate portion, 6. The lighting device according to claim 5, wherein the covering member is disposed on both a corner portion connecting the shielding plate portion to the installation plate portion and a corner portion connecting the shielding plate portion to the base portion.

Images