JP5320505B2 - Lighting device mounting structure - Google Patents

Description

  The present invention relates to a lighting device mounting structure.

  The lighting installed on the ceiling is generally an appliance type lighting such as a downlight or a ceiling light. In many cases, these appliance-type lighting projects from the ceiling surface, and the appearance of the indoor space is not considered so much, such as the presence of the appliance-type lighting remains. Then, the attachment structure of the functional appliance type illumination which raises the illumination production effects, such as a bathroom, and raises pleasures, such as bathing, is proposed (refer to Japanese Utility Model Publication No. 61-178215). Specifically, a plurality of lighting boxes that are L-shaped in a side view and opened downward are attached to the ceiling by connecting the vertical side and the horizontal side, and an illumination lamp is disposed in the vertical part of each lighting box. A louver is attached to the lower opening of the lighting box. In this fixture-type lighting mounting structure, the louver and the ceiling surface are flush with each other, so a clean indoor space is realized. In addition, shadows can be formed between the vertical portion and the horizontal portion, and various lighting effects can be produced.

  However, since the above-mentioned fixture-type lighting mounting structure is configured to mount an illuminating lamp from the indoor side, the external size of the lower opening of the lighting box observed from the indoor side and the louver attached thereto become larger and its presence This is emphasized and there is concern about a decline in appearance.

  Accordingly, an object of the present invention is to provide a mounting structure for a lighting device that can provide a clean indoor space while suppressing the presence of the lighting device observed from the indoor side.

  In the lighting device mounting structure of the present invention, a long lighting device is incorporated between adjacent ceiling materials. The illuminating device includes a light source, a light guide material that guides light emitted from the light source below the ceiling, and a long case body that stores the light source and the light guide material. The light guide member is long and has a light incident surface on one end surface in the longitudinal direction and a light emitting surface that emits illumination light on one side surface in the longitudinal direction. The light source is provided to face the incident surface of the light guide material. Adjacent ceiling members include first and second holding pieces that protrude in the direction of the back of the ceiling from a pair of side end portions facing each other. The lighting device is sandwiched so as not to protrude from the ceiling surface between the first and second holding pieces facing each other of the adjacent ceiling material, and at least a first holding piece at a position above the light guide material, The case body and the second holding piece are attached to the adjacent ceiling material by an adhering tool that passes through in order.

  According to the present invention, the lighting device is attached to the adjacent ceiling material by the fixing tool at least at a position higher than the light guide material, and further, the fixing tool continuously penetrates the three members at once. The presence of the lighting device observed from the indoor side can be suppressed to provide a clean indoor space, and the mounting workability can be improved.

  In the lighting device mounting structure according to the present invention, the case body connects the first and second side plates, which are in contact with the first and second holding pieces, respectively, and the first and second side plates. And a connecting plate. And it is preferable that a light guide material is accommodated in the lower area | region of the connection board enclosed by a connection board and the 1st and 2nd side board.

  Further, in the lighting device mounting structure according to the present invention, the fixture is inserted into the upper region of the connecting plate surrounded by the connecting plate and the first and second side plates so that the lighting device has the first and second holding pieces. It is preferable that it is attached to.

  Moreover, in the attachment structure of the illuminating device of this invention, the 1st and 2nd latching piece which protrudes outward from an outer surface is provided in the 1st and 2nd side plate of a case body, respectively. It is preferable that the first and second locking pieces are hooked on the tip portions of the first and second holding pieces, and the case body is supported by the first and second holding pieces.

  Moreover, in the attachment structure of the illuminating device of this invention, it is preferable that a connection plate is notched and a light source is accommodated in a case body so that attachment or detachment is possible upwards.

  Moreover, in the attachment structure of the illuminating device of this invention, the elongate cover body which covers the lower side area | region of a connection board is provided. The cover body has first and second locking claw pieces at both ends in the short-side direction, and first and second engaging recesses are formed on the first and second side plates, respectively. Then, it is preferable that the first and second engaging claw pieces are hooked in the first and second engaging recesses, respectively, and the cover body is attached to the case body.

  Moreover, in the attachment structure of the illuminating device of this invention, between a 1st latching claw piece and a 1st holding piece, and between a 2nd latching claw piece and a 2nd holding piece, respectively. It is preferable that packing is provided and a gap formed between the cover body and the first and second holding pieces is shielded.

  In the lighting device mounting structure of the present invention, the light source includes a plurality of light sources, and the light guide member includes a plurality of light guide members arranged in a straight line along the longitudinal direction of the case body. Each of the plurality of light guide members is formed such that the second end surface opposite to the incident surface is smaller than the first end surface as the incident surface in the vertical dimension, and the first end surface Are arranged so as to be in contact with the second end face of the adjacent light guide material. Each of the plurality of light sources is preferably arranged above the second end face of each of the plurality of light guide members.

  Moreover, in the attachment structure of the illuminating device of this invention, it is preferable that each of a some light guide material is formed in a wedge shape.

Preferred embodiments of the invention are described in further detail. Other features and advantages of the present invention will be better understood with reference to the following detailed description and accompanying drawings.
It is a perspective view which shows one Embodiment of the attachment structure of the illuminating device of this invention. It is AA sectional view taken on the line of FIG. 1A. It is BB sectional drawing of FIG. 1A. It is a perspective view of a light source unit. It is a disassembled perspective view of an illuminating device. It is a disassembled perspective view explaining attachment to the case body of a light source unit. It is a disassembled perspective view explaining attachment of an illuminating device.

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

  FIG. 1A is a perspective view showing an embodiment of a mounting structure for a lighting device of the present invention, and FIG. 1B is a cross-sectional view taken along line AA of FIG. 1A. 2 is a cross-sectional view taken along line BB in FIG. 1A. FIG. 3 is a perspective view of the light source unit. FIG. 4 is an exploded perspective view of the lighting device. FIG. 5 is an exploded perspective view illustrating attachment of the light source unit to the case body, and FIG. 6 is an exploded perspective view illustrating attachment of the lighting device.

  The ceiling member 40 is a structural member of the ceiling such as a bathroom unit. In the present embodiment, the ceiling of the bathroom unit 60 is configured by two ceiling members 40 and 40 (see FIG. 1A). The ceiling material 40 is formed in a rectangular shape with a metal such as a steel plate or an aluminum plate, or a synthetic resin, and the bottom surface of the ceiling plate 40 is one of the four side ends (four sides) 41a of the face plate portion 41 exposed in the bathroom. A flat holding piece 42 protruding toward the side (upper side) is integrally formed over the entire length (see FIGS. 1B and 6).

  That is, as shown in FIG. 1B, the adjacent ceiling members 40, 40 are holding pieces (first and second holding pieces) 42, 42 that protrude from the pair of side end portions 41 a facing each other toward the back of the ceiling. It has. In the following description, it is simply referred to as holding piece 42 or two holding pieces 42 and 42.

  The holding piece 42 is provided with four through holes 45 at predetermined intervals in the longitudinal direction (see FIG. 6). This through hole 45 is a hole into which a fixing tool 50 described later is inserted, and the number and position thereof are not particularly limited. 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 holding pieces 42 and 42 (that is, the first and second holding pieces) face each other, and the lighting device 1 is attached between the facing holding pieces 42 and 42. .

  The illuminating device 1 is line illumination that shines linearly, and includes a light guide member 2, a light source unit 10 that emits light to the light guide member 2, and a case body 20 that houses the light guide member 2 and the light source unit 10. (Refer to FIG. 4). 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 total length in the longitudinal direction substantially coincides with the length of one side of the ceiling member 40 on which the holding 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. This light guide member 2 has a sectional view in which the left end surface in the longitudinal direction as viewed from FIG. 4 is the incident surface 2a and the lower side surface in the longitudinal direction as viewed from FIG. 2 is the light emitting surface 2b that emits light as illumination light in the indoor space. It is composed of a substantially rectangular long member. More specifically, a wedge in which a pair of opposite side surfaces on the long side asymptotically approach from the incident surface 2a (first end surface) toward the opposite side surface (second end surface, ie, right end surface in the longitudinal direction). One of the pair of side surfaces having a mold shape and asymptotically is the light emitting surface 2b.

  That is, as shown in FIG. 2, the light guide material 2 has a dimension in the vertical direction such that the second end surface opposite to the incident surface 2a is smaller than the first end surface serving as the incident surface 2a. Is formed. And in two adjacent light guide materials 2 and 2, the incident surface 2a (first end surface) of one light guide material 2 is a surface (second surface) opposite to the incident surface 2a of the other light guide material 2. The four light guide members 2 are arranged in a straight line so as to be in contact with each other. Thereby, it is possible to form a space for accommodating the light source unit 10 described later above the second end face side of the light guide member 2.

  Further, the light guide material 2 having a wedge shape can suppress attenuation due to repeated reflection of light incident from the incident surface 2a. 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. 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 upward (see FIG. 3).

  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 23 (that is, the first and second side plates) and the pair of The side plates 23 and 23 (first and second side plates) are integrally formed from a flat plate-like long connecting plate 21 that connects between the first and second side plates (see FIGS. 1B and 4). Specifically, the pair of side plates 23 and 23 (first and second side plates) are disposed substantially parallel to each other, and the connecting plate 21 is disposed between the pair of side plates 23 and 23 so as to be orthogonal to the side plate 23. Arranged, the case body 20 is formed in a substantially H shape in sectional view. 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 sandwiched between the holding pieces 42 and 42 of the adjacent ceiling members 40 and 40, and the outer surface of each side plate 23 comes into contact with each holding piece 42.

  Each side plate 23 has a support piece 24 projecting inward (direction toward the opposite side surface) at the lower end portion over the entire length in the longitudinal direction (see FIG. 1B). The support piece 24 supports the light guide member 2 and is formed substantially parallel to the connecting plate 21. Each side plate 23 has a lower portion recessed inward, and a mounting portion 28 that supports the light source unit 10 is formed.

  The light guide material 2 is supported by the support piece 24 in the lower region Y lower than the connection plate 21 in the region surrounded by the connection plate 21 and the pair of side plates 23 and 23 (first and second side plates). (See FIG. 1B). On the other hand, in the upper region X higher than the connecting plate 21, the fixing tool 50 is inserted from the outside through the through hole 45 of the holding piece 42 described above, and the case body 20 is attached to the holding piece 42. Yes. As a result, the lighting device 1 is attached to the ceiling member 40 without the fixture 50 and the light guide member 2 interfering with each other.

  In the present embodiment, as described above, the presence of the lighting device 1 observed from the indoor side by being attached to the adjacent ceiling members 40 and 40 by the fixing tool 50 at least at a position higher than the light guide member 2. It is possible to provide a clean indoor space by suppressing the above.

  The support pieces 24 of the side plates 23 are separated from each other, and the separation distance d is set to be slightly narrower than the width D of the light guide material 2, and the light emitting surface 2 b of the light guide material 2 can be formed by the support pieces 24. As long as it is not shielded (see FIGS. 1B and 4). The support piece 24 is provided with a protrusion 25 on the upper end side 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.

  Each side plate 23 is provided with four through holes 27 of the fixing tool 50 corresponding to the through holes 45 of the holding piece 42 at four locations in the longitudinal direction (see FIGS. 2 and 6). The lighting device 1 is attached to the holding piece 42 by inserting the fixing tool 50 through the through holes 27 and 45 of the side plate 23 and the holding piece 42. 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 through hole 27 is provided in the side plate 23 below the connecting plate 21, and the fixture 50 is inserted into the lower region Y through the through holes 27 and 45 of the side plate 23 and the holding piece 42, so that the lighting device 1 is attached to the holding piece 42. It can also be attached. In this case, the through hole 27 is provided in the side plate 23 at a position where the light guide member 2 accommodated in the lower region Y and the fixing tool 50 to be inserted do not interfere with each other.

  The height of the holding piece 42 (the length in the direction from the ceiling surface 41b to the back of the ceiling) and the height of the case body 20 (ceiling) so that the lighting device 1 attached to the holding pieces 42, 42 does not protrude from the ceiling surface 41b. The length in the direction from the surface 41b to the ceiling back surface), the position of the through hole 27 of the side plate 23, and the like are set. The illuminating device 1 may be attached to the holding pieces 42 and 42 so as to be flush with the ceiling surface 41b. When the lighting device 1 includes a cover body 30 described later, the lighting device is configured such that the surface of the cover body 30 on the indoor space side does not protrude from the ceiling surface 41b or is flush with the ceiling surface 41b. 1 is attached to the holding pieces 42, 42.

  In the present embodiment, the side plates 23 and 23 (first and second side plates) have plate-like locking pieces 29 and 29 (first and second locking pieces) protruding outward from the outer surface, respectively. The case pieces are provided with the locking pieces 29, 29 (first and second locking pieces) hooked on the tip portions 42a, 42a of the holding pieces 42, 42 (first and second holding pieces), respectively. 20 is supported by holding pieces 42, 42 (see FIG. 1B). 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.

  In this embodiment, the illuminating device 1 is provided with the cover body 30 which covers the lower area | region Y (refer FIG. 1B and 4). The cover body 30 is a flat member made of a transparent synthetic resin such as an acrylic resin or a polycarbonate resin, and is attached to the lower portions of the side plates 23 and 23. The cover body 30 has opposing locking claw pieces 31 and 31 (first and second locking claw pieces) at both end portions on the back side. The locking claw pieces 31 and 31 project upward from the back surface of the cover body 30 and are formed integrally with the cover body 30, and convex portions 32 projecting inwardly are formed at the respective front end portions thereof. ing. On the other hand, in the side plates 23 and 23 to which the cover body 30 is attached, the lower portions are recessed inwardly, and the engagement recesses 33 and 33 (the first portions where the protrusions 32 and 32 of the locking claw pieces 31 and 31 are hooked respectively) And second engaging recesses) are formed. The engagement recess 33 is formed between the support piece 24 and the placement portion 28. By hooking the projections 32, 32 of the locking claw pieces 31, 31 to the engagement recesses 33, 33 (first and second engagement recesses), attaching the cover body 30 and closing the lower region Y, Waterproofness and design are improved. In addition, various optical functions can be given to the cover body 30 to enhance the lighting effect. As an optical function, for example, a lens function is provided, or a diffusion pattern 34 such as a prism pattern in which peaks and valleys of a V-shaped cross section are alternately and continuously provided on the back side of the case body 20 can do. As a result, the light emitted from the light emitting surface 2b is refracted and reflected to have uniform brightness over the entire area, and the appearance can be improved.

  In order to improve waterproofness, a packing 37 may be provided on the back side (holding piece side) of the locking claw piece 31. That is, as shown to FIG. 1B, in this embodiment, between the latching claw piece 31 (1st latching claw piece) and the holding piece 42 (1st holding piece), and the latching claw piece 31 ( Packings 37, 37 are provided between the second locking claw piece) and the holding piece 42 (second holding piece), respectively. When the lighting device 1 is sandwiched between the holding pieces 42 and 42 facing each other, a gap formed between the cover body 30 and the holding pieces 42 and 42 is shielded by the packings 37 and 37, and water tightness is ensured. The The packing 37 is affixed to a stepped portion 36 constituted by a protruding portion 35 formed by protruding a side end portion of the cover body 30 outward and a locking claw piece 31.

  In the present embodiment, end caps 39 made of a rigid member such as synthetic resin are fitted into both ends of the case body 20 (see FIG. 4). 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 material 2 and stores the substrate 12, and holds the light source storage portion 14 in the case body 20 And a holding portion 15 that is connected to each other and formed in a substantially L shape in a side view (see FIG. 3). 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 an upper portion of the side plate 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 it in until the substrate case 13 comes into contact with the placement portion 28 of the side plate 23 (see FIG. 5). Accordingly, the light source storage unit 14 is disposed in the lower region Y, and the holding unit 15 is disposed in the upper region X. The light source storage unit 14 disposed in the lower region Y faces the incident surface 2a of the light guide member 2 also stored in the 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.

  The side plates 23 and 23 of the case body 20 are provided with through holes 38 and 38 respectively corresponding to the through holes 45 and 45 of the holding pieces 42 and 42 above the locking pieces 29 and 29 (see FIG. 5). ). By inserting the connector 54 such as the pin 54 and the screw into the holding portion 15 and the through holes 16, 38, and 38 of the side plates 23 and 23 in a state where the substrate case 13 is stored in the case body 20, the case body 20 is stabilized. Can be attached.

  In the case body 20 and the light source unit 10 having such a configuration, the light source unit 10 can be easily lifted from the case body 20 by removing the connection tool 53 from the through holes 16, 38, 38 of the holding portion 15 and the side plates 23, 23. It is possible to remove in the direction, and it is also possible to insert by inserting from above. 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 when the ceiling members 40 and 40 are attached to the plurality of wall panels 62 constituting the wall of the bathroom unit 60.

  The bathroom unit 60 is generally configured by assembling a waterproof pan, a bathtub 61, a wall panel 62, and ceiling materials 40, 40 in the field (see FIG. 1A). 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 attaching the top opening 63 of the space surrounded by the wall panel 62 on the wall panel 62 so as to be closed by the ceiling materials 40, 40. In this embodiment, the ceiling material 40, 40 is assembled. The lighting device 1 is attached at the time of installation construction.

  That is, as shown in FIG. 6, the first ceiling member 40 of the two ceiling members 40, 40 is divided into a three-side end portion 41 a where the holding piece 42 is not formed and an upper end portion 62 a of the wall panel 62. Arrange them so that they match. Next, the lighting device 1 is disposed by bringing the side plate 23 into contact with the holding piece 42 so that the locking piece 29 is caught by the tip end portion 42 a of the holding piece 42 of the first ceiling member 40. When the locking piece 29 is not provided, the lighting device 1 is disposed on the pair of opposing wall panels 62 so that the side plate 23 contacts 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 holding piece 42 of the second ceiling member 40 is attached to the wall panel 62 so as to contact the side plate 23. Accordingly, the lighting device 1 is sandwiched between the holding pieces 42 and 42 facing each other (temporarily fixed state), and the upper opening 63 in the space surrounded by the wall panel 62 of the bathroom is illuminated with the two ceiling members 40 and 40. The device 1 is closed.

  Next, the lighting device 1 in a temporarily fixed state is fixed to the holding pieces 42 and 42 using the fixing tool 50 such as the bolt 51 and the nut 52 from the inside of the bathroom unit 60 through the inspection port 44 of the ceiling member 40. Specifically, the through holes 45 and 45 of the holding pieces 42 and 42 (first and second holding pieces) and the through hole 27 of the case body 20 through the inspection port 44 of the ceiling member 40 from the inside of the bathroom unit 60. Bolts 51 are inserted and fastened with nuts 52.

  That is, in the lighting device 1 of the present embodiment, as shown in FIG. 1B, the bolt 51 of the fixing tool 50 is in the order of the holding piece 42, the case body 20, and the holding piece 42 (first holding piece, case body, second Since it is attached to the ceiling material 40 by continuously penetrating in the order of the holding pieces), it is possible to fix three members at a time with one fixing tool 50, compared with the mounting structure mentioned in the conventional example. The number of fixing tools is small and the mounting workability is excellent. The width dimension of the case body 20 is set smaller than the length dimension of the bolt 51.

  Thus, since the illuminating device 1 attached to the ceiling materials 40 and 40 does not protrude from the ceiling surface 41b, the presence of the illuminating device 1 observed from the bathroom side can be suppressed. A clean indoor space is provided, and the design can be improved.

  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, in the above embodiment, the connecting plate of the case body is notched so that the lighting unit can be attached and detached upward. However, the case body is made into a two-part assembly that can be assembled, and the lighting unit is assembled by assembling the case body. It may be configured to be sandwiched. In the above embodiment, the attachment of the light source unit to the case body and the attachment of the case body to the holding piece are separately performed by the connecting tool and the fixing tool, but these mountings are made by one fixing tool. You may make it do. For example, the structure which provides the through-hole of the connection tool provided in the light source unit in the location corresponding to the through-hole of the case body and the holding piece, and allows the fixing tool to be inserted through these through-holes may be considered.

  While the invention has been described in terms of several preferred embodiments, various modifications and variations can be made by those skilled in the art without departing from the true spirit and scope of the invention, ie, the claims.

Claims (9)

In the mounting structure of a lighting device in which a long lighting device is incorporated between adjacent ceiling materials,
The illumination device includes a light source, a light guide material that guides light emitted from the light source below the ceiling, and a long case body that houses the light source and the light guide material,
The light guide material is long and has a light incident surface on one end surface in the longitudinal direction and a light emitting surface that emits illumination light on one side surface in the longitudinal direction,
The light source is provided to face the incident surface of the light guide material,
The adjacent ceiling material includes first and second holding pieces that protrude in the direction of the ceiling from the pair of side end portions facing each other,
The lighting device is sandwiched between the first and second holding pieces of the adjacent ceiling members facing each other so as not to protrude from the ceiling surface, and at least at a position above the light guide member. A mounting structure for a lighting device, wherein the lighting device is attached to the adjacent ceiling member by a fixing tool that passes through the holding piece, the case body, and the second holding piece in order.   The case body includes first and second side plates that are in contact with the first and second holding pieces, respectively, and a connecting plate that connects the first and second side plates. The lighting device mounting structure according to claim 1, wherein the light guide material is housed in a lower region of the connection plate surrounded by the connection plate and the first and second side plates.   The lighting device is attached to the first and second holding pieces by inserting the fixing tool into an upper region of the connection plate surrounded by the connection plate and the first and second side plates. The mounting structure of the lighting device according to claim 2.   The first and second side plates of the case body are provided with first and second locking pieces that protrude outward from the outer surface, respectively. The lighting device mounting structure according to claim 2 or 3, wherein the case body is supported by the first and second holding pieces by being hooked on tip portions of the first and second holding pieces, respectively. .   5. The lighting device mounting structure according to claim 2, wherein the connecting plate is cut out and the light source is accommodated in the case body so as to be detachable in an upward direction. 6.   A long cover body covering the lower region of the connecting plate is provided, and the cover body has first and second locking claw pieces at both ends in the lateral direction, and the first and second side plates. Are formed with first and second engaging recesses, respectively, and the first and second engaging claw pieces are respectively hooked on the first and second engaging recesses, and the cover body is The lighting device mounting structure according to claim 2, wherein the lighting device mounting structure is mounted on a case body.   Packing is provided between the first locking claw piece and the first holding piece, and between the second locking claw piece and the second holding piece, respectively, The lighting device mounting structure according to claim 6, wherein a gap formed between the first and second holding pieces is shielded. The light source includes a plurality of light sources,
The light guide material includes a plurality of light guide materials arranged in a straight line along the longitudinal direction of the case body,
Each of the plurality of light guide members is formed such that the second end surface opposite to the incident surface is smaller than the first end surface which is the incident surface in the vertical dimension, and the first Is disposed so that the end face of the second abutting surface comes into contact with the second end face of the adjacent light guide material,
The lighting device mounting structure according to claim 1, wherein each of the plurality of light sources is disposed above a second end face of each of the plurality of light guide members.   The lighting device mounting structure according to claim 8, wherein each of the plurality of light guide members is formed in a wedge shape.

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