JP5486438B2 - Ceiling built-in lighting structure - Google Patents

Description

  The present invention relates to a ceiling built-in lighting structure in which a lighting device is incorporated in a ceiling material.

  Conventionally, a ceiling built-in lighting structure in which a lighting device is incorporated between two ceiling materials is known. For example, the lighting device described in Patent Document 1 includes a box-shaped body that stores and holds a fluorescent lamp and a flat-shaped lighting cover that is attached to the lower surface of the box-shaped body. And built in between the washing area.

JP 2001-152681 A

  In the ceiling built-in lighting structure described above, the interior of the bathroom is illuminated by a fluorescent lamp in a box-like body via a lighting cover, and the space on the bathtub side and the space on the washing room side are illuminated with substantially equal brightness. Has been. However, as for bathroom lighting, the bath space is made brighter so that the bather can easily wash and wash the hair, and the bather can relax and soak in the bathtub. It is desirable not to make it too bright. In order to control the light distribution such as changing the brightness in the bathroom depending on the location with a single lighting device, for example, a fine prism shape may be applied to the lighting cover. However, since the lighting cover of the lighting device incorporated in the ceiling of the bathroom unit is generally a long extrusion molded body of about 2 m, there is a problem that it is difficult to give a fine prism shape with high accuracy.

  The present invention has been made in view of the circumstances as described above, and it is an object of the present invention to provide a ceiling built-in illumination structure with a light distribution control having a simpler structure.

  In order to solve the above problems, the ceiling built-in lighting structure of the present invention is characterized by the following.

  The present invention relates to a ceiling built-in lighting structure in which a lighting device is incorporated between two ceiling materials, the lighting device includes a light source, a light guide material having a light emitting surface for emitting light from the light source, An illumination cover that is disposed to face the light emitting surface of the light guide material and transmits light emitted from the light guide material, and the illumination cover has at least one of a surface facing the light guide material and an opposite surface thereof A convex curved surface having a substantially arc-shaped cross-sectional view is formed on one side of the ceiling material, and light emitted from the light emitting surface of the light guide material is refracted by the convex curved surface of the light guide material. The direction is controlled so as to be directed toward the other ceiling material.

  In this ceiling built-in illumination structure, the illumination cover is preferably formed so that the surface facing the light guide material and the surface on the opposite side thereof are substantially parallel at the other ceiling material side portion.

  Further, in this ceiling built-in lighting structure, the illumination cover is asymptotic from the one ceiling material toward the other ceiling material in a portion facing the light guide material and a surface on the opposite side of the light guide material. It is preferable.

  Furthermore, in this ceiling built-in illumination structure, the light emitting surface of the light guide member is preferably a convex curved surface having a substantially semicircular arc shape in cross section.

  ADVANTAGE OF THE INVENTION According to this invention, the ceiling built-in illumination structure by which light distribution control was carried out can be made into a simpler structure.

(A) is a perspective view which shows one Embodiment of the ceiling built-in illumination structure of this invention, (b) is the sectional view on the AA line of (a). It is the BB sectional view taken on the line of Fig.1 (a). It is a schematic diagram for demonstrating the light distribution of the light which permeate | transmitted the illumination cover. It is a perspective view of a light source unit. It is a disassembled perspective view of an illuminating device. It is a perspective view explaining attachment to the case body of a light source unit. It is a perspective view explaining attachment of an illuminating device. (A), (b) is a schematic diagram which shows another embodiment of a ceiling built-in illumination structure.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  Fig.1 (a) is a perspective view which shows one Embodiment of the ceiling built-in illumination structure of this invention, FIG.1 (b) is the sectional view on the AA line of Fig.1 (a). FIG. 2 is a cross-sectional view taken along line BB in FIG. FIG. 3 is a schematic diagram for explaining the light distribution of the light transmitted through the lighting cover. FIG. 4 is a perspective view of the light source unit, and FIG. 5 is an exploded perspective view of the lighting device. FIG. 6 is a perspective view illustrating attachment of the light source unit to the case body, and FIG. 7 is a perspective view illustrating attachment of the lighting device.

  The ceiling material 40 is a component of the ceiling such as a bathroom unit. In the present embodiment, the ceiling of the bathroom unit 60 is configured by the two ceiling materials 40 and the lighting device 1. The two ceiling members 40 each constitute a ceiling on the bathtub 61 side and a ceiling on the washing place 64 side of the bathroom unit 60, and the lighting device 1 constitutes a ceiling at a boundary portion between the bathtub 61 side and the washing place 64 side.

  The ceiling member 40 is formed in a rectangular shape using a metal such as a steel plate or an aluminum plate, or a synthetic resin, and has a lower surface exposed to one of four side ends (four sides) 41a of the face plate portion 41 exposed in the bathroom. A flat sandwiching piece 42 protruding toward the upper side is bent over the entire length. The sandwiching piece 42 is provided with a positioning hole 46 at one location in the center of the longitudinal direction, and through holes 45 are provided at predetermined intervals at four locations in the longitudinal direction below the positioning hole 46. The positioning holes 46 and the through holes 45 are holes into which rod-shaped positioning members 70 and fixing members 50 described later are inserted, respectively, and the number, position, and the like are not particularly limited. For example, if the lighting device 1 can be attached to the sandwiching piece 42, the positioning holes 46 may be provided at a plurality of locations, or may be provided below the through holes 45. Moreover, the through-hole 45 can also be comprised as the fixing tool insertion hole 71 formed in the inside of the positioning member 70 inserted in the positioning hole 46 so that it may mention later.

  One of the two ceiling members 40 is provided with an inspection port 44 to which an inspection lid 43 can be detachably attached. The two ceiling members 40 are arranged so that the sandwiching pieces 42 face each other, and the lighting device 1 is attached between the sandwiching pieces 42 facing each other.

  The illuminating device 1 is line illumination that shines linearly. The light source unit 10, the light guide material 2 that receives and emits light from the light source unit 10, and the light emitted from the light guide material 2 are transmitted. The lighting cover 30 is provided. Moreover, the case body 20 which accommodates the light guide material 2 and the light source unit 10 is also provided. The light guide material 2 may be singular or plural, and in the case of plural, the light guide members 2 are arranged in the longitudinal direction and are accommodated in the case body 20. In the present embodiment, the four light guide members 2 are arranged in the longitudinal direction, and are continuously arranged so that the ends of the adjacent light guide members 2 are in contact with each other. The overall length in the longitudinal direction substantially coincides with the length of one side of the ceiling member 40 on which the sandwiching piece 42 is formed. Although the four light source units 10 are provided corresponding to the number of the light guide members 2, the number of light source units 10 may be four or less as long as the light guide members 2 are continuously arranged in the longitudinal direction.

  The light guide 2 is made of a material having a high refractive index, such as a synthetic resin such as an acrylic resin or a polycarbonate resin, or a glass. The light guide member 2 has a long side having a substantially rectangular shape in cross-section in which one side surface on the short side is an incident surface 2a and one side surface on the long side is a light emitting surface 2b that emits light as illumination light in the indoor space. Consists of members. More specifically, a pair of opposing side surfaces on the long side from the incident surface 2a toward the opposite side surface has a wedge shape, and one of the ascending pair of side surfaces is the light emitting surface 2b. The By adopting the wedge shape, attenuation due to repeated reflection of light incident from the incident surface 2a can be suppressed. In order to enhance this effect, a light guide pattern for diffusing and deriving light can be provided on the side surface opposite to the light emitting surface 2b among the pair of side surfaces asymptotically. The light guide pattern is formed, for example, by sticking a reflective sheet or printing or depositing a reflective substance on the side surface opposite to the light emitting surface 2b. The light guide pattern can also be formed by groove processing or forming a groove in a direction orthogonal to the longitudinal direction of the light guide material 2. Such a light guide pattern can be provided over the entire length of the light guide member 2 in the longitudinal direction.

  The light source unit 10 includes a light source 11 such as an LED, a substrate 12, and a substrate case 13 that accommodates the substrate 12, and is accommodated in the case body 20 so as to be detachable in the vertical direction.

  One or a plurality of light sources 11 are mounted on the substrate 12, and the substrate 12 is mounted on the substrate case 13 so that the light sources 11 are disposed to face the incident surface 2 a of the light guide 2, and the substrate case 13 is the case. Mounted on the body 20.

  The case body 20 is made of a rigid member such as a metal such as aluminum or a synthetic resin, and has a pair of opposed flat plate-like long side plates 23 and a flat plate-like long connection that connects the pair of side plates 23. It is formed integrally with the plate 21. Specifically, the pair of side plates 23 are arranged substantially parallel to each other, the connecting plate 21 is arranged between the pair of side plates 23 so as to be orthogonal to the side plates 23, and the case body 20 is substantially H-shaped in cross section. Is formed. By setting it as such a shape, the intensity | strength of case body 20 itself is effectively ensured, and the bending and deformation | transformation of case body 20 are suppressed. The rigidity required for attaching the lighting device 1 to the ceiling member 40 is more effectively ensured. Moreover, it can also serve as a reinforcing material for the ceiling material 40. The strength of the light guide member 2 housed in the case body 20 is also reinforced, and the light guide member 2 has a function of suppressing bending and deformation.

  The case body 20 is disposed between the clamping pieces 42 formed on each of the two ceiling members 40, and the outer surface of each side plate 23 (the surface opposite to the surface on the opposite side plate side) is the respective one. It abuts on the inner side surface of the clamping piece 42 (the surface on the opposite clamping piece side).

  Each side plate 23 has a flat plate-like support piece 24 that protrudes inward (a direction toward the opposite side plate) at the lower end portion over the entire length in the longitudinal direction. The support piece 24 is formed substantially parallel to the connecting plate 21. The support pieces 24 of the side plates 23 are formed to face each other, and the light guide material 2 is sandwiched and supported between the support pieces 24. In addition, on the inner side surface (surface on the side plate on the opposite side) of each side plate 23, a lower portion is recessed inward, and a mounting portion 28 that supports the light source unit 10 is formed.

  The light guide material 2 is supported and accommodated by the support piece 24 in the lower region Y that is formed below the connecting plate 21 and opens downward in the region surrounded by the connecting plate 21 and the pair of side plates 23. On the other hand, in the upper region X formed on the upper side of the connecting plate 21 and opened upward, the positioning member 70 is inserted from the outside through the positioning hole 46 of the holding piece 42 described above, and the case body 20 is held by the holding piece 42. Can be attached to. Further, the fixing tool 50 is inserted from the outside through the through hole 45 of the sandwiching piece 42 so that the case body 20 is fixed to the sandwiching piece 42. As a result, the lighting device 1 is attached to the ceiling member 40 without the positioning member 70 and the fixture 50 and the light guide member 2 interfering with each other.

  The separation distance d between the support pieces 24 formed facing the side plates 23 of the case body 20 is set to be slightly narrower than the width D of the light guide material 2, and is supported by the light emitting surface 2 b of the light guide material 2. The piece 24 is made as unshielded as possible. Each support piece 24 is provided with a protrusion 25 on the upper end portion to form a stepped portion 26. Since the light guide material 2 is sandwiched between the step portions 26 of the support pieces 24, the installation stability of the light guide material 2 is improved and the case body 20 is stably stored.

  The light guide 2 is housed in the case body 20 by being inserted into the lower region Y from one end of both ends of the case body 20 so that the light emitting surface 2b of the light guide 2 faces the indoor space. Made by.

  Each side plate 23 of the case body 20 is provided with a positioning hole 37 of a positioning member 70 corresponding to the positioning hole 46 of the holding piece 42 at a substantially central position in the longitudinal direction. Each side plate 23 is provided with through holes 27 of the fixing tool 50 corresponding to the through holes 45 of the sandwiching pieces 42 at four positions in the longitudinal direction below the positioning holes 37. The lighting device 1 is attached to the sandwiching piece 42 by inserting the positioning member 70 into the positioning holes 37 and 46 of the side plate 23 and the sandwiching piece 42, and the fixing tool 50 is attached to the through holes 27 and 45 of the side plate 23 and the sandwiching piece 42. The lighting device 1 is fixed to the clamping piece 42 by being inserted and fastened. In order to suppress deformation of the case body 20 at the time of fastening of the fixing tool 50 as much as possible, it is preferable that a through hole 27 is provided in the vicinity of the connecting plate 21. A positioning hole 37 and a through hole 27 are provided in the side plate 23 below the connecting plate 21, and a positioning member 70 is provided in the lower region Y through the positioning holes 37 and 46 and the through holes 27 and 45 of the side plate 23 and the clamping piece 42. It is also possible to attach and fix the lighting device 1 to the holding piece 42 by inserting the fixing tool 50. In this case, the positioning member 70 and the through hole 27 are provided in the side plate 23 at a position where the light guide member 2 housed in the lower region Y does not interfere with the positioning member 70 and the fixing tool 50 to be inserted.

  The height of the clamping piece 42 (the length in the direction from the ceiling surface 41b to the back of the ceiling (back)) and the height of the case body 20 so that the lighting device 1 attached to the clamping piece 42 does not protrude from the ceiling surface 41b. (Length in a direction from the ceiling surface 41b to the ceiling back surface) and the like are set. Similarly, the shapes and positions of the positioning holes 37 and 46 and the through holes 27 and 45 of the side plate 23 and the holding piece 42 are set so that the lighting device 1 does not protrude from the ceiling surface 41b. It is preferable that the height of the above-described member, the shape of the hole, the position, and the like are set so that the lighting device 1 is flush with the ceiling surface 41b. When the lighting device 1 includes the lighting cover 30 described later, the height of the above-described members, the shape of the hole, the position, and the like are set so that the surface of the lighting cover 30 on the indoor space side does not protrude from the ceiling surface 41b. The

  The shape of the positioning holes 37 and 46 of the side plate 23 and the sandwiching piece 42 is preferably a shape that substantially matches the outer shape of the positioning member 70. At this time, it is preferable that the clearance formed between the positioning holes 37 and 46 and the positioning member 70 when the positioning member 70 is inserted into the positioning holes 37 and 46 is as small as possible. For example, when the positioning member 70 has a cylindrical shape, it is considered that the positioning holes 37 and 46 are formed in a circular shape slightly smaller than the outer diameter of the positioning member 70. The shape of the through holes 27 and 45 of the side plate 23 and the sandwiching piece 42 is not particularly limited as long as the lighting device 1 can be fixed to the sandwiching piece 42 by fastening the fixing tool 50. For example, the clearance formed between the through holes 27 and 45 and the fixing tool 50 when the fixing tool 50 is inserted is larger than the clearance between the positioning holes 37 and 46 and the positioning member 70 described above. It can be made into such a long hole shape.

  In the present embodiment, the side plate 23 of the case body 20 is provided with a flat locking piece 29 protruding outward from the outer surface, and the locking piece 29 is hooked on the tip 42a of the holding piece 42 and the case The body 20 is placed on and supported by the sandwiching piece 42. Thereby, when attaching the illuminating device 1 to the ceiling material 40, fall of the case body 20 can be prevented. It also has the advantage of improving workability.

  The illumination cover 30 is disposed so as to face the light emitting surface 2 b of the light guide member 2, and is attached to the lower portion of the side plate 23 of the case body 20 so as to cover the light guide member 2. The lighting cover 30 is a long member manufactured by extrusion molding or the like with a transparent synthetic resin such as an acrylic resin or a polycarbonate resin, has a length substantially the same as the entire length in the longitudinal direction of the case body 20, and the ceiling material 40. At the same time, the ceiling of the bathroom unit 60 is formed.

  The lighting cover 30 is provided with an optical function, and the lighting effect of the lighting device 1 is enhanced. For example, as shown in FIG. 1, a surface 82 opposite to the surface (facing surface 81) facing the light guide material 2 of the illumination cover 30 is a flat surface, and is opposed to the light emitting surface 2 b of the light guide material 2. It is formed substantially in parallel. On the other hand, the opposing surface 81 is formed with a convex curved surface 83 having a substantially ¼ arc shape in a cross-sectional view at a portion on the ceiling material 40 side on the bathtub 61 side. The facing surface 81 is formed with a surface 84 that is continuous with the convex curved surface 83 from the ceiling material 40 on the bathtub 61 side toward the ceiling material 40 on the washing place 64 side, and a portion on the ceiling material 40 side on the bathtub 61 side and the washing place. The 64 side ceiling material 40 side portion is continuous. A surface 84 continuing to the convex curved surface 83 is a flat surface and is formed substantially parallel to the opposite surface 82. In this way, the surface on which the convex curved surface 83 is formed (opposing surface 81 in this embodiment) is asymmetric in the shape of the portion on the ceiling material 40 side on the bathtub 61 side and the portion on the ceiling material 40 side on the washing place 64 side. ing.

  By using the illumination cover 30 having such a structure, the space on the washing place 64 side in the bathroom unit 60 can be illuminated more brightly than the space on the bathtub 61 side. FIG. 3 is a schematic diagram for explaining the light distribution of the light transmitted through the illumination cover 30, in which the light guide material 2 and the illumination cover 30 disposed facing the light emitting surface 2 b are simplified and described. ing. The arrows in the figure indicate the direction of light irradiation.

  The light emitted from the light emitting surface 2b of the light guide material 2 is light diffused by the light guide pattern, and the light directed toward the bathtub 61 is refracted by the convex curved surface 83 of the illumination cover 30 and the irradiation direction thereof is Head toward the washing area 64. On the other hand, the light emitted from the light emitting surface 2b of the light guide 2 toward the washing field 64 is illuminated because the surface 84 continuous to the convex curved surface 83 and the opposite surface 82 are formed substantially in parallel. Even if it passes through the cover 30, it goes to the washing place 64 as it is. Thus, the light passing through the illumination cover 30 is directed toward the washing place 64, and in the bathroom unit 60, the intensity of the light radiated to the space on the washing place 64 side is in the space on the bathtub 61 side. It becomes higher than the intensity of the irradiated light, and the space on the washing place 64 side becomes brighter. When the illumination cover 30 is not provided as in the present embodiment, the light emitted from the light emitting surface 2b of the light guide member 2 is diffused light, so the space on the washing place 64 side and the space on the bathtub 61 side are approximately equal in brightness. It will be illuminated. Further, the lighting cover 30 has a simple structure that is easy to extrude, such as a surface 84 that is continuous with the convex curved surface 83 and a surface 82 on the opposite side, and can be manufactured at a low cost. Manufacturing is stabilized and quality reliability is improved.

  The convex curved surface 83 of the lighting cover 30 may be formed not only on the opposing surface 81 but also on the portion of the opposite surface 82 on the ceiling material 40 side on the bathtub 61 side, or only on the opposite surface 82. It may be. In any case, light distribution control is possible, and the space on the washing place 64 side can be brightened. In consideration of design properties such as providing a clean indoor space while suppressing the presence of the lighting device 1 observed from inside the bathroom unit 60, and the cleaning in the bathroom, the convex curved surface 83 is formed only on the opposing surface 81, The opposite surface 82 is preferably a flat surface.

  The lighting cover 30 of the present embodiment has a pair of opposing locking claw pieces 31 at both end portions. The locking claw piece 31 protrudes upward from the facing surface 81 of the lighting cover 30 and is formed integrally with the lighting cover 30, and a convex portion 32 protruding inward is formed at the tip thereof. . On the other hand, on the outer side surface of the side plate 23 to which the illumination cover 30 is mounted, an engagement recess 33 is formed in which the lower portion is recessed inward and the protrusion 32 of the locking claw piece 31 is hooked. The engagement recess 33 is formed between the support piece 24 and the placement portion 28. The projection 32 of the locking claw piece 31 is hooked on the engagement recess 33, the illumination cover 30 is mounted, the lower region Y is closed, and the light guide material 2 is covered, thereby improving waterproofness and design. .

  In order to further improve waterproofness, a packing 80 that contacts the holding piece 42 may be provided on the back side (holding piece side) of the locking claw piece 31. When the lighting device 1 is sandwiched between the opposing sandwiching pieces 42, a gap formed between the illumination cover 30 and the sandwiching piece 42 is shielded by the packing 80, and water tightness is ensured. The packing 80 is affixed to the stepped portion 36 formed by the protruding portion 35 formed by protruding the side end portion of the lighting cover 30 outward and the locking claw piece 31.

  In the present embodiment, end caps 39 made of a rigid member such as synthetic resin are fitted into both end portions of the case body 20. As a result, the gaps at both ends of the case body 20 are closed.

  Next, attachment of the light source unit 10 to the case body 20 will be described.

  The light source unit 10 is attached after the light guide member 2 is stored in the case body 20.

  The substrate case 13 constituting the light source unit 10 has a box-shaped light source storage portion 14 that has an opening on the incident surface 2 a side of the light guide member 2 and stores the substrate 12, and holds the light source storage portion 14 in the case body 20. The holding portion 15 is continuously provided, and is formed in a substantially L shape in a side view. The holding portion 15 is formed by extending a pair of side plates 17 constituting the light source storage portion 14 upward, and a pair of through holes 16 are formed in the upper part of the pair of side plates 17. The connection plate 21 of the case body 20 is cut out at a portion where the light source unit 10 is mounted to form an opening 22, and the upper region X and the lower region Y communicate with each other through the opening 22. The light source unit 10 is attached to the case body 20 by inserting the light source unit 10 into the opening 22 of the connecting plate 21 from above and pushing the lower end portion of the substrate case 13 until it contacts the mounting portion 28 of the side plate 23. Accordingly, the light source storage portion 14 of the light source unit 10 is disposed in the lower region Y, the holding portion 15 of the light source unit 10 is disposed in the upper region X, and the light source unit 10 is stored in the case body 20. The light source storage unit 14 disposed in the lower region Y faces the incident surface 2 a of the light guide member 2 stored in the same lower region Y, and from the light source 11 mounted on the substrate 12 of the light source storage unit 14. Light is emitted toward the incident surface 2 a of the light guide member 2.

  In the side plate 23 of the case body 20, a through hole 38 corresponding to the through hole 45 of the holding piece 42 is provided above the locking piece 29. With the board case 13 being housed in the case body 20, the connecting member 53 such as the pin 54 and the screw is inserted into the holding portion 15 and the through holes 16 and 38 of the side plate 23, so that the case body 20 can be stably attached. it can.

  In the present embodiment, the light source unit 10 can be easily detached upward from the case body 20 by removing the coupling tool 53 from the through holes 16 and 38 of the holding portion 15 and the side plate 23, and the case body 20. It is also possible to install by inserting from above to below. For this reason, it is excellent in maintainability and workability, such that the light source unit 10 can be easily replaced and inspected.

  The lighting device 1 having the above-described configuration is attached to the ceiling member 40 when the ceiling member 40 is attached to a plurality of wall panels 62 constituting the wall of the bathroom unit 60, for example.

  The bathroom unit 60 is generally configured by assembling a waterproof pan, a bathtub 61, a wall panel 62, and a ceiling material 40 on the site. For example, a wall panel placing portion is formed on the upper end of the outer end of the waterproof pan, and a plurality of wall panels 62 are placed on the wall panel placing portion. Next, the bathroom unit 60 is assembled by being mounted on the wall panel 62 so as to close the upper opening 63 of the space surrounded by the wall panel 62 with the ceiling material 40. In the present embodiment, the lighting device 1 is attached to the ceiling member 40 when the ceiling member 40 is attached. Below, the attachment to the ceiling material 40 of the illuminating device 1 is demonstrated.

  First, as shown in FIG. 7, one ceiling member 40 of the two ceiling members 40 is arranged such that the three-side end portion 41 a where the clamping piece 42 is not formed and the upper end portion 62 a of the wall panel 62 coincide with each other. Place and install. Next, the lighting device 1 is arranged by bringing the side plate 23 of the case body 20 into contact with the sandwiching piece 42 so that the locking piece 29 of the case body 20 is caught by the tip end portion 42a of the sandwiching piece 42 of the ceiling member 40. In the case where the locking piece 29 is not provided in the lighting device 1, both end portions of the lighting device 1 are placed on the pair of opposing wall panels 62 so that the side plate 23 comes into contact with the holding piece 42. At this time, the lighting device 1 is in a state in which both ends thereof are supported by the pair of wall panels 62 and are bridged over the bathroom.

  Next, the other ceiling member 40 is attached to the wall panel 62 so that the sandwiching piece 42 of the other ceiling member 40 contacts the side plate 23. Thus, the lighting device 1 is sandwiched between the sandwiching pieces 42 formed to face each of the one ceiling member 40 and the other ceiling member 40, and the upper opening 63 of the space surrounded by the wall panel 62 of the bathroom. Is closed by the two ceiling members 40 and the lighting device 1.

  Next, the lighting device 1 is attached and temporarily fixed between the two ceiling members 40 using the rod-shaped positioning member 70 from the inside of the bathroom unit 60 through the inspection port 44 of the ceiling member 40.

  The positioning member 70 is formed of a rigid material such as metal and has sufficient strength. The lighting device 1 is sandwiched between the sandwiching pieces 42 of the two ceiling members 40 and is inserted into the positioning holes 37 and 46. In this state, both ends are long enough to protrude outward from each sandwiching piece 42. The positioning member 70 of this embodiment has a cylindrical shape, and both end portions have an inclined structure in which the outer diameter gradually decreases toward the tip. This inclined structure facilitates the insertion into the positioning holes 37 and 46, and may have an inclined structure only at one end. Of course, it does not have to have an inclined structure. The shape of the positioning holes 37 and 46 is formed in a circular shape according to the outer shape of the positioning member 70. The shapes of the positioning member 70 and the positioning holes 37 and 46 are not particularly limited. For example, the positioning member 70 may be a prismatic shape, and the positioning holes 37 and 46 may be rectangular.

  The positioning member 70 is inserted into the positioning holes 37 and 46 in a state in which the lighting device 1 is sandwiched between the sandwiching pieces 42 of the two ceiling members 40, whereby the lighting device 1 is attached to the two ceiling members 40. Installed between. The positioning member 70 is inserted into the positioning holes 37 and 46 by the following method. That is, one end of the positioning member 70 is inserted into the positioning hole 46 of the sandwiching piece 42 of one ceiling member 40 from the outside, and the positioning hole 37 of the case body 20 of the lighting device 1 and the other ceiling member are inserted. The 40 clamping pieces 42 are sequentially inserted through the positioning holes 46. When the end portion of the positioning member 70 has an inclined structure, the end portion is inserted into the positioning hole 46 of the sandwiching piece 42 of one ceiling member 40, and the positioning hole 37 and the other of the case body 20 of the lighting device 1 are inserted. What is necessary is just to insert sequentially in the positioning hole 46 of the clamping piece 42 of the ceiling material 40 of this. By inserting the positioning member 70 into the positioning holes 37 and 46, the lighting device 1 is attached between the two ceiling members 40 and temporarily fixed. At this time, the lighting device 1 is attached in a state where the surface of the lighting cover 30 of the lighting device 1 on the indoor space side is substantially flush with the ceiling surface 41b.

  Next, the lighting device 1 in a temporarily fixed state is fixed between the two ceiling members 40 using the fixing tool 50 including the bolts 51 and the nuts 52 from the inside of the bathroom unit 60 through the inspection port 44 of the ceiling member 40. To fix. Specifically, with the lighting device 1 temporarily fixed, the tip of the bolt 51 is inserted from the outside into the through hole 45 of the sandwiching piece 42 of one ceiling member 40, and the case body 20 of the lighting device 1 is inserted. The through hole 27 and the through hole 45 of the sandwiching piece 42 of the other ceiling member 40 are sequentially inserted. The lighting device 1 is fixed between the two ceiling members 40 by fastening the tip of the inserted bolt 51 with a nut 52 from the outside of the through hole 45 of the clamping piece 42 of the other ceiling member 40. .

  Thus, the sandwiching piece 42 of the ceiling member 40 is illuminated by inserting the positioning member 70 into the positioning holes 37 and 46 in a state where the lighting device 1 is sandwiched between the sandwiching pieces 42 of the two ceiling members 40. The device 1 can be easily attached and temporarily fixed. By appropriately adjusting and setting the positions of the positioning holes 37 and 46, the surface of the lighting cover 30 of the lighting device 1 on the indoor space side is substantially flush with the ceiling surface 41b. It becomes possible to attach to. Further, the lighting device 1 can be positioned easily and accurately. Since the illuminating device 1 is attached to the clamping piece 42 by the positioning member 70 and temporarily fixed, the illuminating device 1 can be easily fixed by the fixing tool 50 without adjusting the position such as shifting the illuminating device 1 up and down and left and right. it can. The lighting device 1 can be easily fixed between the two ceiling members 40 so as not to protrude from the ceiling surface 41b, the presence of the lighting device 1 observed from the bathroom side is suppressed, and the interior space is clean. Can be imparted and the design can be improved.

  The lighting device 1 attached between the two ceiling members 40 as described above is light-distributed so as to illuminate the space on the washing place 64 side more brightly than the space on the bathtub 61 side. Therefore, in the washing place 64, the bather can easily perform operations such as body washing and hair washing, and the usability is improved. In the bathtub 61, a calm space is realized such that the bather can relax and soak in the bathtub. The lighting device 1 has a simple structure in which the lighting cover 30 does not have a fine prism shape. Since the lighting cover 30 has a simple structure that can be easily extruded, it can be manufactured at a low cost, and the manufacturing is stabilized and the reliability of quality is improved.

  Another embodiment of the ceiling built-in illumination structure will be described. FIG. 8 is a schematic view showing another embodiment of the ceiling built-in lighting structure, in which a light guide material and a lighting cover arranged to face the light emitting surface are simplified. The same parts as those in the ceiling built-in illumination structure shown in FIGS. 1 to 7 are denoted by the same reference numerals, and the description thereof is omitted.

  In the embodiment of FIG. 8A, the surface 84 that is continuous with the convex curved surface 83 of the facing surface 81 of the lighting cover 30 is linear with the surface 82 on the opposite side from the ceiling material on the bathtub side toward the ceiling material on the washing place side. And an inclined surface 85 is formed. The light guide 2 has the same shape as the light guide 2 in FIG.

  In this embodiment, of the diffused light emitted from the light emitting surface 2b of the light guide member 2, the light directed toward the bathtub is refracted by the convex curved surface 83 of the illumination cover 30, and the irradiation direction is directed toward the washing area. On the other hand, the light traveling toward the washing area is refracted on the inclined surface 85 of the illumination cover 30 as indicated by an arrow, and is condensed slightly toward the bathtub. Therefore, the light that has passed through the illumination cover 30 and travels toward the washing place is condensed slightly closer to the bathtub and the directivity is enhanced, and the space on the washing place side can be illuminated more effectively and brightly.

  Note that the inclined surface 85 may be formed not only on the facing surface 81 of the lighting cover 30 but also on the opposite surface 82, or may be formed only on the opposite surface 82.

  In the embodiment of FIG. 8 (b), the light emitting surface 2b of the light guide member 2 is a substantially semicircular convex curved surface in a cross-sectional view, and is formed in a rounded shape. The illumination cover 30 has the same shape as the illumination cover 30 of FIG.

  In this embodiment, the light incident on the light guide member 2 is refracted and condensed on the light emitting surface 2b, and the light emitted from the light emitting surface 2b is prevented from diffusing and has increased directivity as indicated by arrows. ing. When such light with high directivity passes through the illumination cover 30, the light transmitted through the illumination cover 30 toward the washing area is also highly directional, and the space on the washing area side can be illuminated more effectively and brightly. it can.

  In any embodiment, since the brightness can be secured efficiently, there is an advantage that energy saving can be achieved.

  While the present invention has been described based on the embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, it can also be set as the structure which combined the illumination cover of Fig.8 (a), and the light guide material of FIG.8 (b). In the above embodiment, the light source unit of the lighting device is disposed to face the side surface on the short side of the light guide material. However, the light source unit may be disposed on the upper side of the light guide material. The shape may be a rectangular parallelepiped shape.

DESCRIPTION OF SYMBOLS 1 Illuminating device 2 Light guide material 2b Light emission surface 11 Light source 30 Lighting cover 40 Ceiling material 81 Opposing surface 82 Opposite surface 83 Convex curved surface

Claims (4)

  In a ceiling built-in lighting structure in which a lighting device is incorporated between two ceiling materials, the lighting device includes a light source, a light guide material having a light emitting surface for emitting light from the light source, and the light guide. An illumination cover that is disposed to face the light emitting surface of the material and allows light emitted from the light guide material to pass therethrough, wherein the illumination cover includes at least one of a surface facing the light guide material and an opposite surface thereof. On one surface, a convex curved surface having a substantially arc shape in cross-section is formed in one portion on the ceiling material side, and light emitted from the light emitting surface of the light guide material is a convex curved surface of the light guide material. The ceiling built-in lighting structure is controlled so that the direction of irradiation is directed toward the other ceiling material.   2. The ceiling assembly according to claim 1, wherein a surface of the lighting cover that faces the light guide member and a surface on the opposite side thereof are formed substantially parallel to each other on the ceiling member side portion. Built-in lighting structure.   In the lighting cover, a surface facing the light guide material and a surface on the opposite side are gradually approaching from one ceiling material to the other ceiling material in a portion on the other ceiling material side. The ceiling built-in illumination structure according to claim 1.   The ceiling built-in illumination structure according to any one of claims 1 to 3, wherein the light emitting surface of the light guide material is a convex curved surface having a substantially semicircular arc shape in cross section.