JP2013232344A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device capable of reducing a maintenance cost and enhancing a degree of freedom in designing a surface of a structure.SOLUTION: A lighting device, which is installed on a surface of a structure and of which the periphery is covered by a platy panel of a prescribed thickness, includes a lighting unit, a unit installation mechanism, a cover, and a cover installation mechanism. The lighting unit has a platy surface and emits illumination light. The unit installation mechanism has a frame member and a fixing member. The frame member surrounds at lease two mutually opposing sides of the periphery of the lighting unit. The fixing member fixes the lighting unit to the surface of the structure with the frame member interposed. The cover has a platy surface and is arranged on a front face side of the lighting unit, opposed to the surface side of the structure. The cover installation mechanism has a locking member for locking a part of the periphery of the cover and fixes the locking member by energizing to press the locking member to the frame member.

Description

  The present invention relates to a lighting device to be mounted on the surface of a structure whose periphery is covered with a plate-like panel having a predetermined thickness.

  In structures such as buildings and civil engineering buildings, lighting devices are installed on the ceiling, walls, floors, etc. of the structures.

  For a lighting device installed on the ceiling, for example, a lighting device installed in a living space such as a general house, in order to soften the direct illumination light and enhance the light emission quality, a translucent function having a diffusion function on the front surface A cover is placed. The translucent cover may be referred to as a diffusion plate or simply a cover.

  The main body of the lighting device includes a light source (lamp, light emitting element) and the like. Generally, the main body is installed at a height different from the ceiling surface, and protrudes indoors from the ceiling surface. Since the cover covers the front surface of the main body of the lighting device, the cover further protrudes indoors with respect to the main body. An attachment / detachment mechanism for attaching / detaching the cover to / from the body is provided for inspecting and repairing the body, or for replacing the cover.

  As an example of a cover attaching / detaching mechanism, the cover is attached to and detached from the main body by rotating or sliding the cover with respect to the main body so that the main body side rib and the cover side rib are fitted and detached from each other ( For example, Patent Document 1).

  As another example of the lighting device installed on the ceiling, there is one having a lamp unit including a light source and a lighting device unit. The lighting device unit is connected to the lamp unit by a leaf spring. An embedding hole is provided in the ceiling. When the lighting device is mounted, the lighting device unit is installed from the indoor side through the embedded hole to the back side of the ceiling. The lamp unit is fitted into the embedding hole and installed at the same height as the ceiling surface. The lamp unit and the lighting device unit are maintained in a stable state at a predetermined position by the restoring force of the leaf spring (for example, Patent Document 2).

  Furthermore, as another example of the lighting device installed on the ceiling, there is one having a light source, a light guide material, a case body, and a lighting cover. The lighting device has a structure incorporated between two ceiling materials. A case body is disposed on the back side of the ceiling material opposite to the indoor side, and a light source and a light guide material are accommodated in the case body. A lighting cover is elastically fitted into the opening of the case body. The surface of the lighting cover fitted into the opening of the case body is installed at the same height as the surface of the ceiling material. In the ceiling material, an inspection port is provided near the lighting cover, and the inspection port is closed by an inspection lid (for example, Patent Document 3).

  In recent years, by combining a light-emitting element such as an LED and a light guide plate that receives light from the light-emitting element and is emitted in a predetermined direction from a predetermined position, lighting devices having various shapes including a thin shape can be created. Became. In addition, due to diversification of the shape of the lighting device, the degree of freedom when designing the surface of the structure on which the lighting device is installed is increasing.

JP 2009-87578 A JP 2007-317549 A JP 2012-48920 A

  However, in the lighting device described in Patent Document 1, since the cover protrudes indoors from the ceiling surface, it gives a sense of protrusion to indoor users and restricts the design of the surface of the structure. There was a point.

  In order to prevent the user from feeling a protrusion, to install the cover at the same height as the ceiling surface, the cover is embedded by the thickness of the cover. There was a problem that it could not be rotated or slid.

  In the lighting device described in Patent Document 2, the lamp unit is set at the same height as the ceiling surface, so that it does not give a sense of protrusion to indoor users, and restricts the design of the surface of the structure. However, there is a problem that a large space for installing the lighting device unit is required on the back side of the ceiling.

  In the lighting device described in Patent Document 3, the surface of the lighting cover is set to the same height as the surface of the ceiling material, so that it does not give a sense of protrusion to indoor users, and the design of the surface of the structure However, since the lighting cover fits tightly into the case body, when inspecting and repairing the internal parts of the lighting device (light source, light guide material, etc.) behind the ceiling material, Since it is very difficult to remove from the case body, the lighting cover is not attached or detached when the light source or the like is inspected and repaired.

  For example, when inspecting and repairing a light source or the like, first, an inspection port is opened. Next, the case body is removed from a predetermined position by looking into the back side of the ceiling material from the inspection port. Next, the case body is moved indoors. When the inspection or the like is completed, the case body is returned from the inspection port to the back side of the ceiling material and attached to a predetermined position. Next, the inspection port is closed with an inspection lid.

  As described above, since the work of inspecting and repairing the light source and the like is time-consuming, there is a problem in that the maintenance cost of the lighting device is increased and an inspection port needs to be provided.

  This invention solves said problem, and it aims at providing the illuminating device which can reduce a maintenance cost and can raise the freedom degree when designing the surface of a structure.

In order to solve the above-mentioned problems, a lighting device according to claim 1 of the present invention is a lighting device to be mounted on the surface of a structure whose periphery is covered with a plate-shaped panel having a predetermined thickness. An illumination unit that emits illumination light; a frame member that surrounds at least two opposite sides of the periphery of the illumination unit; and the illumination unit that is fixed to the surface of the structure via the frame member A unit mounting mechanism including a fixing member, a cover having a plate-like surface and disposed on a front surface side opposite to the surface side of the structure of the lighting unit, and a part of a peripheral edge of the cover. And a cover mounting mechanism that includes a locking member that stops and urges and fixes the locking member against the frame member.
The lighting device according to claim 2 of the present invention is the lighting device according to claim 1, wherein the thickness including the frame member and the cover is a predetermined thickness of the panel, and the cover mounting The mechanism is characterized in that the cover is detachable by pulling the locking member forward in the direction opposite to the biasing direction.
Furthermore, the illumination device according to claim 3 of the present invention is the illumination device according to claim 2, wherein the cover attachment mechanism pulls the locking member to remove the cover from the peripheral panel. The cover is configured to be able to move along the surface of the structure by being positioned further forward.
Furthermore, the illumination device according to claim 4 of the present invention is the illumination device according to claim 3, wherein the cover mounting mechanism has one end fixed to the rear of the frame member and the other end being a free end. A plate spring arranged in a cantilever state, and a shaft member that is movably moved in the front-rear direction through a through hole provided in the frame member, and the front end of the shaft member is , Connected to the locking member,
The rear end portion of the shaft member is connected to the other end of the leaf spring.
Furthermore, the illuminating device according to claim 5 of the present invention is the illuminating device according to any one of claims 1 to 4, wherein the cover has a peripheral portion positioned in front of the frame member. The peripheral edge portion of the cover has a light-transmitting property lower than that of the center of the surface of the cover.
Furthermore, the illumination device according to claim 6 of the present invention is the illumination device according to claim 1 or 2, wherein the illumination unit includes a light emitting element and a light guide plate having the plate-like surface. And the light from the light emitting elements arranged along the side surface of the light guide plate is incident on the side surface and emitted from the surface of the light guide plate, and the illumination unit sandwiches the light guide plate It further has a holding member formed in a substantially U-shaped cross-sectional shape provided with both wall portions and a bottom wall portion connecting the both wall portions, and between the bottom wall portion and the side surface of the light guide plate The light emitting element is arranged in the gap.
Furthermore, the illuminating device according to claim 7 of the present invention is the illuminating device according to claim 6, wherein the unit mounting structure includes a corner member disposed at a corner of the substantially rectangular frame member. A corner portion of the holding member formed in a substantially rectangular shape so as to be fitted into the frame member, and a gap between the corner portion and the corner member formed by chamfering the corner portion. The fixing member extended from the corner member, and the fixed portion extended from the corner portion in the gap, and fixing the fixing member and the fixed portion to each other. Thus, the frame member and the illumination unit are connected to each other.
Furthermore, the illuminating device according to claim 8 of the present invention is the illuminating device according to claim 6, wherein the holding member is constituted by a plurality thereof, the gap between the holding members, and the The gap between the holding member and the fixed portion is light-shielded so as to prevent light from entering / exiting light from the light emitting element.

According to the lighting device of the first aspect, the cover can be installed at the same height as the surface of the panel, and the degree of freedom when designing the surface of the structure can be increased.
Further, even if the cover is installed at the same height as the surface of the panel, a space for attaching and detaching the cover is provided in front of the panel by moving the locking member forward against the urging force. Therefore, it is easy to attach and detach the cover, and it is possible to reduce the maintenance cost because it does not take time to check and repair the internal parts of the lighting device.
According to the lighting device of the second aspect, since the thickness including the frame member and the cover is the predetermined thickness of the panel, the lighting device can be mounted instead of the panel. Thereby, the place restriction | limiting when arrange | positioning a panel and an illuminating device is eased, and it becomes possible to further raise the freedom degree when designing the surface of a structure. Even if the cover is installed at the same height as the surface of the panel, a space for attaching and detaching the cover can be easily provided by pulling the locking member forward against the urging force.
Furthermore, according to the lighting device according to claim 3, when the cover is removed from the locking member, or when the cover is locked to the locking member, the locking member is pulled forward, and then the cover is removed from the structure. Since it is sufficient to move along the surface, the cover can be easily attached and detached.
Furthermore, according to the illumination device of the fourth aspect, the amount of bending of the other end (free end) of the leaf spring is the amount of the cover to be pulled out. When the cover is pulled out, the position of the other end of the leaf spring is determined so that the cover is positioned in front of the surface of the panel. The position of the other end of the leaf spring can be adjusted by adjusting the position of one end of the leaf spring.
Furthermore, according to the illumination device of the fifth aspect, since the permeability of the peripheral portion of the cover is lowered, the frame member positioned behind the peripheral portion of the cover cannot be seen, and the appearance quality can be improved. .
Further, according to the illumination device of claim 6, the holding member emits light in a gap between the bottom wall and the side surface of the light guide plate by sandwiching the light guide plate between both wall portions. By disposing the element, it is possible to have a function of holding the light-emitting element.
Further, according to the lighting device of claim 7, the frame member and the lighting unit are connected to each other without increasing the thickness in the gap between the corner member of the frame member and the corner portion of the holding member. Therefore, the apparatus can be made thin.
Furthermore, according to the illumination device of the eighth aspect, the light from the light emitting element does not exit to the outside through the gap between the holding members, and the light emitted to the outside passes through the gap. Thus, it is possible to prevent the light from entering the inside.

The figure when the illuminating device with which the ceiling was mounted | worn is seen from the diagonally lower position. Sectional drawing of the illuminating device with which the ceiling was mounted | worn. The exploded perspective view of an illuminating device. Sectional drawing of the right side part of an illuminating device. Sectional drawing of the left side part of an illuminating device. The perspective view of a frame member. The perspective view of a lighting unit. The partial top view of a unit attachment mechanism. The perspective view of a translucent cover. The perspective view which shows a cover attachment structure. The perspective view which shows the structure which added the protection member. The perspective view of the illuminating device which shows the state which removed the translucent cover.

The structure of the illuminating device 10 which concerns on one Embodiment of this invention is demonstrated with reference to each figure. FIG. 1 is a view of the lighting device 10 mounted on the ceiling when viewed from an obliquely lower position, and FIG. 2 is a cross-sectional view of the lighting device 10 mounted on the ceiling.
In the following description, a ceiling surface will be described as an example of the surface of the structure. The front may be referred to as the lower side. Further, the front-rear direction may be referred to as the up-down direction or the height direction.

(Panel P)
As shown in FIG.1 and FIG.2, the panel P and the illuminating device 10 are mounted | worn with the ceiling surface. The panel P is disposed around the lighting device 10. The panel P may be referred to as a ceiling material.

  As a method for mounting the panel P and the lighting device 10 on the ceiling surface, a general method is used. As an example of the mounting method, adjacent panels P are combined with each other. Moreover, the adjacent panel P and the illuminating device 10 are mutually combined. Furthermore, the panel P is fixed to the ceiling surface. Further, the lighting device 10 is fixed to the ceiling surface.

  As a method of fixing the panel P and the lighting device 10, a general method according to the material of the ceiling surface is used. For example, if the material of the ceiling surface is concrete, a fixing method using an anchored screw fixed to the pilot hole is used. In the case where the ceiling surface is constituted by a plurality of square members (wood) and base materials (wood) arranged at a predetermined pitch, a fixing method using screws or staples is used. Square members, base materials, screws, and staples are denoted by “C1”, “C2”, “F1”, and “F2” in FIG.

  The panel P is a plate-like surface (for example, 300 mm long × 300 mm wide) and has a predetermined thickness (for example, 9 mm). As an example of the material of the panel P, any one of gypsum, glass fiber, aluminum, stainless steel, wood, and diatomaceous earth, or a combination of two or more of these materials is used.

[Configuration of Lighting Device 10]
Next, each structure of the illuminating device 10 is demonstrated with reference to FIG.2 and FIG.3. FIG. 3 is an exploded perspective view of the lighting device 10.

  As illustrated in FIG. 3, the lighting device 10 includes a lighting unit 20, a unit mounting mechanism 30, a translucent cover 40, and a cover mounting mechanism 50. The illuminating device 10 moves the translucent cover 40 downward, and then moves between one side (for example, the back side of the worker) and the other side (the front side of the worker) along the ceiling surface. Thus, the translucent cover 40 is configured to be attached and detached.

(Lighting unit 20)
Next, the lighting unit 20 will be described with reference to FIGS. 4 is a cross-sectional view when the rear end of the lighting device 10 is broken from a direction perpendicular to the surface, and FIG. 5 is a broken front end of the lighting device 10 from a direction perpendicular to the surface. It is sectional drawing when doing.

  The illumination unit 20 includes a light emitting element 11, a light guide plate 12, and a holding member 15.

  As shown in FIGS. 4 and 5, the light emitting elements 11 are arranged along both side surfaces (a back side surface and a front side surface) of the light guide plate 12. The light emitting element 11 is disposed in a gap between the side surface of the light guide plate 12 and a bottom wall 19 (described later) of the holding member 15. For the light emitting element 11, for example, a light emitting diode (LED) is used. In addition, the light emitting element 11 should just be arrange | positioned along the whole or one part of the surrounding surface of the light-guide plate 12. FIG. Where and how the light emitting element 11 is arranged on the peripheral surface depends on where and how light is emitted from the surface of the light guide plate 12.

  The light guide plate 12 has a plate-like surface, and the light guide plate 12 is configured such that light from the light emitting element 11 is incident on the side surface and light (illumination light) is emitted from the surface. The light guide plate 12 has a thickness of 3.0 mm to 5.0 mm, and an acrylic transparent plastic plate is generally used as a material. Besides, a polycarbonate (PC) resin and a cycloolefin resin are used. ing.

  As shown in FIGS. 4 and 5, a light reflecting sheet 13 is attached to the back surface (ceiling surface side) of the light guide plate 12. The light reflecting sheet 13 prevents light from being emitted from the light emitting element 11 to the back side and reflects it downward (front) so as to efficiently guide the light to the light guide plate 12. For example, a film obtained by vapor-depositing silver on a PET film that is excellent in quality, or a film obtained by laminating metal stays (for example, aluminum) is used. The light reflecting sheet 13 (including a plurality of layers) has a thickness of 1.0 mm, for example. For example, a metal plate is bonded to a sheet of 0.5 mm or less and used at about 1 mm.

  In the light guide plate 12, the other peripheral surfaces except the side surface on which the light emitting elements 11 are arranged are subjected to light reflection processing. As light reflection processing, using a reflective tape, light leaking from the end face of the light guide plate 12 where the light emitting element 11 is not disposed is returned to the light guide plate 12 to increase the emission efficiency from the surface.

  As shown in FIGS. 4 and 5, the holding member 15 includes four side portions 16 (see FIGS. 3 and 7) and four corner portions 17 (see FIGS. 3 and 7) that connect the adjacent side portions 16. ) And is configured to be fitted into the frame member 31 (see FIG. 3).

  The cross-sectional shapes of the side portion 16 and the corner portion 17 are formed in a substantially U shape including both wall portions 18 (see FIG. 4) and a bottom wall 19 that connects both wall portions 18. Both wall portions 18 are formed so as to sandwich the edge portions of both surfaces (the front surface and the back surface (the back surface of the light reflecting sheet 13 attached)) of the light guide plate 12. Thereby, the holding member 15 has a function of holding the light guide plate 12 by the both wall portions 18. The light emitting element 11 is arranged in the gap between the bottom wall 19 and the side surface of the light guide plate 12. Thereby, the holding member 15 has a function of holding the light emitting element 11 by the bottom wall 19.

The gap between the side portion 16 and the corner portion 17 and the gap between the corner portion 17 and the fixed portion 36 are subjected to a light shielding process to prevent light from entering / exiting from the light emitting element 11. .
As an example of the light shielding treatment, there is black body coating in which a material having an emissivity close to that of a black body (for example, a carbon nanotube black body) is applied to a gap between the side portion 16 and the corner portion 17. Black body coating can absorb light in a wide wavelength range from ultraviolet rays, visible rays, and far-infrared rays. As a result, the light from the light emitting element 11 does not exit to the outside through the gap, and does not enter the inside through the gap from the outside, so that unnecessary light enters or exits through the gap. Therefore, the light emission quality can be improved.

  The outer wall surfaces of both wall portions 18 and the outer wall surface of the bottom wall portion 19 are subjected to light reflection prevention processing. As an example of the light reflection preventing process, there are a process for absorbing light from the light emitting element 11 and a process for diffusing light.

  Examples of the light absorbing treatment include black body coating (described above) in which a material having an emissivity close to that of a black body is applied to the outer wall surfaces of both wall portions 18 and the outer wall surfaces of the bottom wall portions 19, or a surface non-reflective structure. Processing is used. In addition, you may affix on the film by which the black body was coated, or an outer wall surface. In the surface non-reflective structure treatment, by forming a nanostructured conical row on the outer wall surface, the light from the light emitting element 11 is absorbed by the outer wall surface, and light reflection on the outer wall surface is eliminated. As a result, light that becomes unnecessary in the lighting unit 20 or is no longer required is absorbed by the outer wall surface and cannot be seen, and the appearance quality can be improved.

  The thickness of the illumination unit 20 is, for example, 6.0 mm to 7.0 mm. The thickness of the light guide plate 12, the thickness of the light reflection sheet 13, and the plate thickness of the holding member 15 (for example, 1.. 0 mm). In addition, since the light emitting element 11 is disposed in the gap between the bottom wall 19 and the side surface of the light guide plate 12, it does not constitute the thickness of the illumination unit 20.

(Unit mounting mechanism 30)
Next, the unit attachment mechanism 30 will be described with reference to FIGS. 2, 3 and 6 to 8. 6 is a perspective view of the frame member 31, FIG. 7 is a perspective view of the illumination unit 20, and FIG. 8 is a partial plan view of the unit mounting mechanism 30.

  As shown in FIG. 2, the unit attachment mechanism 30 includes a first attachment mechanism for fixing the frame member 31 and the illumination unit 20 to each other, and an illumination unit 20 for fixing the illumination unit 20 to the ceiling surface via the frame member 31. A second attachment mechanism.

  As shown in FIG. 3, the first attachment mechanism includes a corner member (corner member) 33 of the frame member 31, a corner portion 17 of the holding member 15, an extending member (fixing member) 35, and a fixed member 36. have.

  As shown in FIGS. 6 to 8, the frame member 31 is formed in a substantially rectangular shape having four sides and four corners. The straight member 32 corresponds to the side portion 16 of the frame member 31, and the corner member 33 corresponds to the corner portion of the frame member 31. Adjacent straight members 32 are connected by a corner member 33 using screws.

  The straight member 32 has an angle cross-sectional shape. The corner member 33 has a substantially L shape. The corner member 33 is thicker than the straight member 32 in order to support a fixed member 36 on the lighting unit 20 side, which will be described later. The straight member 32 and the corner member 33 are formed of, for example, aluminum or a steel plate. Note that the frame member 31 may be a member that surrounds at least two opposing sides around the lighting unit 20.

  As a process for diffusing light, for example, the surface of the frame member 31 is made to have fine irregularities so that the reflected light is widely scattered (unevenness process), and the surface of the frame member 31 is coated with a plurality of thin film materials. A treatment that suppresses reflection (non-reflective coating treatment) is used. Thereby, the light which becomes unnecessary in the illumination unit 20 or becomes unnecessary is diffused by the frame member 31 and is not visually recognized as the frame member 31, and the appearance quality can be improved.

  In FIG. 8, the corner | angular part 17 of the holding member 15 and the corner member 33 arrange | positioned facing the corner of the frame member 31 with respect to it are expanded and shown. As shown in FIG. 8, the corner portion 17 of the holding member 15 is chamfered. Due to the chamfering, a substantially triangular gap is formed between the corner portion 17 and the corner member 33. An extension member (fixing member) 35 extends from the corner member 33 in the gap. Further, the fixed member 36 extends from the corner portion 17 in the gap. The extending member 35 and the fixed member 36 are fixed to each other. The extension member 35 is provided with a screw hole (not shown). By fastening the bolt in the screw hole, the frame member 31 and the lighting unit 20 are connected to each other. The extension member 35 and the fixed member 36 are each provided with a pilot hole for passing a bolt. Further, the extending member 35 is provided with a through hole 35b through which the screw F1 (see FIGS. 2 and 6) is passed. In this way, by using the gap, the frame member 31 and the lighting unit 20 can be connected to each other, and the apparatus can be thinned.

  The second attachment mechanism has the corner member 33 described above and the screw F1 shown in FIG. 2, and the corner member 33 is fixed to the ceiling surface (the surface of the structure) with the screw F1. Thereby, the illumination unit 20 can be fixed to the ceiling surface via the frame member 31.

(Translucent cover 40)
Next, the translucent cover 40 will be described with reference to FIGS. FIG. 9 is a perspective view of the translucent cover 40.

  As shown in FIGS. 2 and 9, the translucent cover 40 has a plate-like substantially square surface and is disposed on the front surface side opposite to the ceiling surface side of the lighting unit 20.

  The translucent cover 40 is arranged so that the peripheral edge 41 is located below (front) the frame member 31. The peripheral edge portion 41 of the translucent cover 40 has lower translucency than the center 42 of the surface of the translucent cover 40. By reducing the translucency of only the peripheral edge portion 41, it is possible to suppress a decrease in luminance when the lighting unit 20 emits light, and when the lighting unit 20 does not emit light, the peripheral edge portion 41 is not transparent. It is possible to improve the appearance quality by making the frame member 31 invisible from the indoor side through the transparent cover.

  The translucent cover 40 has a surface shape of 300 mm length × 300 mm width and a thickness of 1.0 mm to 1.5 mm. A transparent plastic plate made of acrylic is generally used as the material of the translucent cover 40, and polycarbonate (PC) resin is also used in addition.

  In order to reduce the translucency of the peripheral edge portion 41 of the translucent cover 40, for example, a process of absorbing light performed on the back surface of the translucent cover 40 (surface on the lighting unit 20 side) and diffusing the light Is used. By reducing the translucency of the peripheral portion 41, the frame member 31 positioned above (backward) the peripheral portion 41 cannot be seen, and the appearance quality can be improved.

  As specific processing, 1) simply paint only the ceiling color or favorite color to lower the translucency. 2) Overpainting, ceiling color or favorite color on the front side of the room side, shading layer (eg black body paint or gray paint) on the back layer, and the same color as the front side (the third layer is on the back) Paint without). 3) The ceiling side surface is painted with a ceiling color or a favorite color, and the front surface (reflection surface) is subjected to light diffusion treatment.

  Light diffusion treatment includes uneven treatment and non-reflective coating treatment. In the concavo-convex treatment for the translucent cover 40, for example, the back surface of the translucent cover 40 is sandblasted, and further, the back surface is chemically treated to make the translucent cover 40 milky white, There are two types of processing, which are to create a concavo-convex pattern and processing that is made opaque with sand and a metal brush.

(Cover mounting mechanism 50)
Next, the cover mounting structure will be described with reference to FIGS. FIG. 10 is a perspective view showing a cover mounting structure, and FIG. 11 is a perspective view showing a structure in which a protection member 56 is added.

  As shown in FIG. 10, the cover mounting mechanism 50 includes a locking member 51, a plate spring 55 as an urging means, and a shaft member 58.

  Four locking members 51 are provided corresponding to the four corner edges 43 of the translucent cover 40.

  Two of the four locking members 51 on the back side are fixed to the frame member 31 (a locking member on the fixed side). The two front locking members 51 are supported by the frame member 31 so as to be movable in the vertical direction (moving side locking members). The two locking members 51 on the fixed side lock the two corner edges 43 on the back side of the translucent cover 40. The two locking members 51 on the moving side lock the corner edge 43 on the near side of the translucent cover 40. By identifying the locking member 51 on the fixed side and the locking member 51 on the moving side using their colors, shapes, and the like, the attaching and detaching work of the translucent cover 40 becomes reliable and easy.

  The leaf spring 55 urges and fixes the movable side locking member 51 to the frame member 31 so as to press it. When the translucent cover 40 is attached, the locking member 51 is pressed against the frame member 31 by urging. The position of the cover 40 is determined. The position of the opening of the locking member 51 is set so that the translucent cover 40 when mounted is at the same height as the surface of the peripheral panel P.

  Since the load of the translucent cover 40 is applied to the locking member 51, the leaf spring 55 has an urging force larger than the load applied to the locking member 51 on the movable side due to the load of the translucent cover 40. The stop member 51 is pressed against the frame member 31 (pressing force).

Assuming that the load applied to the movable side locking member 51 by the pressing force, the urging force, and the load of the translucent cover 40 is F, F1, and F2, these relationships can be expressed by other forces such as an applied force. If the frictional force between the biasing member and the locking member 51 is not taken into consideration, it is expressed by the following equation.
F = F1-F2 (1)
From the above equation, it can be seen that when the translucent cover 40 is attached or detached, the locking member 51 may be pulled downward against the pressing force F.

  The cover mounting mechanism 50 pulls the locking member 51 downward, so that the position of the opening of the locking member 51 (the translucent cover 40 in which the peripheral edge 41 fits in the opening) is lower (frontward) than the surface of the peripheral panel P. The translucent cover 40 is configured to be movable between the back side and the near side along the ceiling surface.

  The plate spring 55 is arranged in a cantilever state in which one end is fixed to the rear of the frame member 31 by bolts, screws, and a plurality of spacers 57 (washers) and the other end is a free end.

  The height of one end of the leaf spring 55 is adjusted by changing the number of spacers 57 arranged between the frame member 31 and the bolt. In addition, the distance between the other end (free end) of the leaf spring 55 and the frame member 31 is also adjusted by this change.

  The amount of bending of the other end of the leaf spring 55 is the amount of pulling when the locking member 51 is pulled out so that the translucent cover 40 is positioned below the surface of the panel P. Therefore, the distance between the other end of the leaf spring 55 and the frame member 31 is set to be larger than the pulling amount of the locking member 51. In order to adjust the distance between the other end of the leaf spring 55 and the frame member 31, the number of the spacers 57 may be changed.

  The shaft member 58 is inserted through a through hole provided in the frame member 31 so as to be movable in the front-rear direction. The front end (lower end) of the shaft member 58 is connected to the locking member 51, and the rear end (upper end) of the shaft member 58 is connected to the other end of the leaf spring 55. Note that the distance between the other end of the leaf spring 55 and the frame member 31 can be adjusted also by changing the position of the other end of the leaf spring 55 with respect to the rear end portion of the shaft member 58.

  As described above, by configuring the cover mounting mechanism 50, the translucent cover 40 is pulled out by pulling the locking member 51 in a direction (downward) opposite to the direction (upward) urged by the leaf spring 55. Detachable.

  The locking member 51 locks the four corner edges 43 (see FIG. 9) of the translucent cover 40. The translucent cover 40 has its center 42 (see FIG. 9) bent downward due to its own weight. If the center 42 is greatly bent downward, the quality of the appearance is deteriorated. Further, as will be described later, since the meaning of making the light-transmitting cover 40 the same height as the surface of the panel P is reduced, the center 42 is greatly bent downward. The locking member 51 locks the translucent cover 40 so as not to be bent (so as to be a slight amount even if it is bent). Therefore, the portion to be locked varies depending on the size and shape of the surface of the translucent cover 40. For example, when the surface is substantially rectangular, four corner edges 43 and one or a plurality of long sides are locked by the locking member 51.

  The locking member 51 has a function of guiding the translucent cover 40 so as to be movable in the surface direction of the ceiling surface in addition to the function of locking the translucent cover 40. (Refer to FIG. 9) has a substantially U-shaped groove-like cross section having an opening for fitting, and has a certain length along the peripheral edge portion 41 of the translucent cover 40.

  The width of the opening of the locking member 51 is set to 2.5 mm, for example. As described above, the translucent cover 40 has a thickness of 1.0 mm to 1.5 mm. Therefore, when the peripheral edge 41 of the translucent cover 40 is fitted into the opening, a gap of 1.0 mm to 1.5 mm is formed. This gap is used when a cover described later is attached or detached.

  In order to pull the locking member 51 downward when the translucent cover 40 is attached or detached, the following mechanism is applied to the locking member 51 on the moving side.

  For example, when the opening is a gap between both walls of the groove of the locking member 51, the width of the opening is set larger than the thickness of the peripheral edge portion 41 of the translucent cover 40. When the translucent cover 40 is attached, the peripheral edge portion 41 of the translucent cover 40 is in contact with the lower wall of the groove of the locking member 51. When the peripheral edge portion 41 of the translucent cover 40 is pushed up so as to come into contact with the upper wall of the groove of the locking member 51, a gap is provided between the peripheral edge portion 41 of the translucent cover 40 and the lower wall. It is possible to put a tool or the like in this gap and pull out the locking member 51 downward.

  Further, the translucent cover 40 may be devised to pull out the locking member 51 downward. For example, a concave portion (not shown) is provided in the vicinity of the moving-side locking member 51 in the peripheral edge portion 41 of the translucent cover 40. It is possible to pull out the locking member 51 downward by placing a tool or the like in the recess.

  FIG. 11 is a diagram of a structure in which a protection member 56 is added. As shown in FIG. 11, a protection member 56 is disposed so as to cover the leaf spring 55 from the outside. The protection member 56 can prevent foreign matter and the like from entering between the leaf spring 55 and the frame member 31, thereby preventing the leaf spring 55 from malfunctioning.

  As described above, the lighting device 10 includes the frame member 31, the lighting unit 20, and the translucent cover 40 as main components. Since the lighting unit 20 is included in the thickness of the frame member 31 in the thickness of the lighting device 10, most of the thickness of the lighting device 10 is occupied by the frame member 31 and the translucent cover 40. . In the present embodiment, the thickness of the lighting device 10 (thickness including the frame member 31 and the translucent cover 40) is set to be a predetermined thickness of the panel P. Thereby, it becomes possible to selectively mount the panel P and the lighting device 10 in the same place, which is a space of 300 mm length × 300 mm width. As a result, the place restrictions when arranging the panel P and the lighting device 10 are alleviated, and the degree of freedom when designing the surface of the structure can be further increased.

  According to the illuminating device 10 according to the present embodiment described above, when the translucent cover 40 is attached to the locking member 51, the translucent cover 40 has the same height as the surface of the surrounding panel P. Therefore, it becomes possible to increase the degree of freedom when designing the surface of the structure. Further, if the locking member 51 is moved downward against the urging force, a space for attaching / detaching the translucent cover 40 is provided below the surface of the panel P, and the translucent cover 40 is arranged along the ceiling surface. And can be easily attached and detached.

[Maintenance work]
Next, operations such as inspection and repair of the lighting device 10 according to the present embodiment will be described.

(Removal work of translucent cover 40)
FIG. 1 shows the lighting device 10 when the translucent cover 40 is attached. At this time, the translucent cover 40 and the groove wall 52 of the locking member 51 are visible from the indoor side. However, the plate thickness of the groove wall 52 is slight, and the groove wall 52 is located at almost the same height as the surface of the panel P arranged in the periphery of the lighting device 10, which gives a user a sense of protrusion. There is no. Further, the groove wall 52 does not disturb the design.

  When the translucent cover 40 is mounted, it cannot be rotated by interference with the surrounding panel P or moved along the ceiling surface. Further, the two corner edges 43 on the back side of the translucent cover 40 are locked to the locking member 51 on the fixed side, and the two corner edges 43 on the near side are locked to the locking member 51 on the moving side. .

  In this state, the movable side locking member 51 is pulled downward against the urging force of the leaf spring 55. Thereby, a space for detaching the translucent cover 40 is easily provided below the surface of the panel P. By moving the translucent cover 40 to the near side along the ceiling surface, the corner edge 43 on the back side of the translucent cover 40 is detached from the locking member 51 on the fixed side, and further moved to the near side. Further, the corner edge 43 on the back side of the translucent cover 40 is detached from the locking member 51 on the moving side, and the translucent cover 40 can be easily detached.

  FIG. 12 is a perspective view of the lighting device 10 showing a state in which the translucent cover 40 is detached. As shown in FIG. 12, by removing the translucent cover 40, the frame member 31 and the lighting unit 20 fitted in the opening of the frame member 31 appear on the indoor side.

(Inspection, repair and replacement of lighting unit 20 etc.)
By removing the translucent cover 40, the frame member 31 and the lighting unit 20 appear on the indoor side, so that the lighting unit 20 can be inspected, repaired, and replaced.
In order to perform these operations, the nut shown in FIG. 8 is removed from the bolt, and the connection between the extending member 35 and the fixed member 36 is released, so that the illumination unit 20 can be detached from the opening side of the frame member 31. It is configured.

(Installation of translucent cover 40)
In a state where the translucent cover 40 is detached, the movable side locking member 51 is pulled downward (forward) against the urging force of the leaf spring 55. Thereby, a space for mounting the translucent cover 40 is provided below the surface of the panel P. By locking the corner edge 43 on the back side of the translucent cover 40 to the movable side locking member 51, and further moving the translucent cover 40 to the back side along the ceiling surface, The back side corner edge 43 is locked to the fixed side locking member 51, and the near side corner edge 43 is locked to the moving side locking member 51. At this time, the translucent cover 40 is moved upward by the urging force of the leaf spring 55 and is fitted into a substantially rectangular space surrounded by the panel P, and is positioned at the same height as the surface of the panel P. As a result, the translucent cover 40 can be easily attached.

  In the present embodiment, the leaf spring 55 is shown as the urging means, but any means may be used as long as the restoring force can be used as the urging force of the locking member 51. For example, a coil spring or a spring washer may be used.

  Moreover, in the said embodiment, although the ceiling surface was demonstrated as an example of the surface of the structure with which the illuminating device 10 is mounted | worn, as a surface of a structure, not only a ceiling surface but a wall surface and a floor surface may be sufficient.

P panel 10 illuminating device 11 light emitting element 12 light guide plate 13 light reflecting sheet 15 holding member 16 side portion 17 corner portion 18 wall portion 19 bottom wall 20 lighting unit 30 unit mounting mechanism 31 frame member 32 straight member 33 corner member (corner member)
35 Extension member (fixing member)
35a Pilot hole 36 Fixed member 36a Pilot hole 40 Translucent cover 41 Peripheral part 42 Center 43 Square edge 50 Cover attachment mechanism 51 Locking member 52 Groove wall 55 Leaf spring 56 Protection member 57 Spacer 58 Shaft member

Claims (8)

A lighting device to be mounted on the surface of a structure whose periphery is covered with a plate-like panel having a predetermined thickness,
An illumination unit having a plate-like surface and emitting illumination light;
A unit mounting mechanism including a frame member surrounding at least two opposite sides of the periphery of the lighting unit, and a fixing member for fixing the lighting unit to the surface of the structure via the frame member;
A cover having a plate-like surface and disposed on the front side opposite to the front side of the structure of the lighting unit;
A cover mounting mechanism that has a locking member that locks a part of the peripheral edge of the cover, and that biases and fixes the locking member against the frame member;
A lighting device comprising: The thickness including the frame member and the cover is a predetermined thickness of the panel,
The lighting device according to claim 1, wherein the cover mounting mechanism is configured such that the cover is detachable by pulling the locking member forward in a direction opposite to the urging direction. The cover mounting mechanism is configured such that the cover can be moved along the surface of the structure by pulling out the locking member to position the cover in front of the peripheral panel. The lighting device according to claim 2. The cover mounting mechanism is
A leaf spring disposed in a cantilever state in which one end is fixed to the rear of the frame member and the other end is a free end;
A shaft member movably passed through the through hole provided in the frame member in the front-rear direction;
Have
A front end portion of the shaft member is coupled to the locking member;
The lighting device according to claim 3, wherein a rear end portion of the shaft member is connected to the other end of the leaf spring. The cover is disposed such that a peripheral edge thereof is positioned in front of the frame member,
The lighting device according to any one of claims 1 to 4, wherein the peripheral edge portion of the cover has low translucency compared to a center of a surface of the cover. The illumination unit includes a light emitting element and a light guide plate having the plate-like surface, and light from the light emitting elements arranged along the side surface of the light guide plate is incident on the side surface, Configured to exit from the surface,
The lighting unit further includes a holding member formed in a substantially U-shaped cross-sectional shape including both wall portions sandwiching the light guide plate and a bottom wall portion connecting the both wall portions,
The lighting device according to claim 1, wherein the light emitting element is disposed in a gap between the bottom wall portion and the side surface of the light guide plate. The unit mounting configuration is
A corner member disposed at a corner of the substantially rectangular frame member;
A corner portion of the holding member formed in a substantially rectangular shape so as to be fitted into the frame member;
The fixing member extended from the corner member in a gap between the corner portion and the corner member formed by chamfering the corner portion;
A fixed portion extending from the corner to the gap;
Have
The lighting device according to claim 6, wherein the frame member and the lighting unit are connected to each other by fixing the fixing member and the fixed portion to each other. The holding member is constituted by a plurality of the members,
The gap between the holding members and the gap between the holding member and the fixed part are subjected to a light shielding process so as to prevent light from entering / exiting from the light emitting element. The lighting device according to claim 6.

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