JP5311560B2 - Indirect lighting unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an indirect lighting unit easily adaptable at a construction site to avoid the appearance of a cut-off line or achieve desired gradation. <P>SOLUTION: The indirect lighting unit 1 includes a lighting box body 2 to be horizontally installed near a ceiling 21, a socket mounting plate 3, and dowels 4 as fitting protrusion members. To the surface of the socket mounting plate 3, a socket 10 of a fluorescent lamp 9 as a light source is fastened with screws, so that the socket can be arranged inside the lighting box body 2. On the reverse face of the socket mounting plate 3, fitting recessed portions 11 are formed at the wall side edge and at the freeze board side edge to fit the dowels 4 thereinto. In the opposed side faces of a back board 6 and a freeze board 8, a plurality of dowel holes 12 are formed along the vertical direction, as fitting holes into which the bases of the dowels 4 are detachably fitted. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an indirect lighting unit installed in an architectural space such as a house, office, or museum, or a civil engineering space such as an underground promenade.

  Among the illumination methods, so-called direct illumination is a method in which light is directly applied to an object, whereas indirect illumination is indirect light applied to an object by using light reflection on a ceiling surface or a wall surface. In direct illumination, the illuminance at the object increases and the visibility and workability increase, but on the other hand, the light enters the eyes and feels dazzling.

  In contrast, indirect illumination reduces the illuminance at the object, but the overall illuminance including the surroundings becomes uniform, and light does not enter the eyes directly, so it is possible to produce a calm atmosphere. .

  When performing illumination design, direct illumination and indirect illumination are appropriately used or combined in consideration of such balance between visibility and workability and atmosphere formation.

  As described above, indirect illumination requires light to be reflected by the ceiling surface and wall surface, and it is necessary to prevent light from the light source from directly entering the eyes by appropriate light shielding means. If it feels dazzling and there is too much shading, the ceiling and walls will become dark, resulting in insufficient lighting.

  The boundary between a bright part and a dark part projected on the ceiling or wall surface is called a cut-off line. If such a cut-off line appears clearly, the effect of indirect illumination is reduced, which is not desirable.

  That is, when performing indirect illumination, it is important to prevent a cut-off line, in other words, to form a gradation in the brightness of light.

JP 2007-299611 A JP 2006-286433 A JP 2005-19344 A JP-A-8-171809 JP-A-6-346545

  Here, it is not always necessary to clearly understand whether or not a cut-off line is formed on the ceiling surface or wall surface by the light from the light source or what kind of light gradation is projected on the ceiling surface or wall surface from the design stage. It's not easy.

  For example, if the ceiling surface is curved or has a slope, there will be a slight shift or variation in the incident angle of the light, which may cause a cut-off line or a gradation expected. Often it is different.

  Further, even if the ceiling surface or wall surface is a horizontal or vertical plane, a situation may occur where the cut-off line does not appear or does not appear depending on the gloss, color, or material of the finishing material constituting the ceiling surface or wall surface.

  Also, if the type of light source is changed in the middle, the presence or absence of a cut-off line and gradation will be different from those at the time of design.

  In such a situation, it is necessary to change the mounting height of the light source at the construction site or to process the light shielding means on site so that the cut-off line does not appear or a desired gradation is obtained.

  However, in the conventional indirect lighting unit, since such cut-off line and gradation are not taken into consideration at all, there is a problem that it takes time and effort to deal with the above-mentioned field work.

  The present invention has been made in consideration of the above-described circumstances, and an object thereof is to provide an indirect lighting unit that can be easily handled at a construction site so that a cut-off line does not appear or a desired gradation is obtained. To do.

In order to achieve the above object, an indirect lighting unit according to the present invention, as described in claim 1, is a back plate that abuts and is fixed to a wall surface, and is erected on an edge thereof so as to be orthogonal to the back plate. An illumination box body having a substantially J-shaped cross section, comprising a connecting plate and a curtain plate standing on the edge of the connecting plate so as to be orthogonal to the connecting plate and to face the back plate; and a socket for a light source the a socket attachment means for positioning inside the illumination box body, the socket attachment means, Ri Na installation distance of the socket from the connecting plate is configured to be variable, the socket attachment A socket mounting plate to which the socket is mounted, and a fitting projection member fitted into a fitting recess formed on the back surface side edge portion and the curtain plate side edge portion on the back surface of the socket mounting plate. When configured The one in which the base of the fitting projecting member said back plate and form respective fitting holes on the opposing surfaces of the curtain plate fitting hole is to be removably fitted.

Moreover, the indirect lighting unit according to the present invention as described in claim 2, the back plate is in contact fixed to the wall, erected been tie plate and the tie on its edge as to be perpendicular to the back plate An illumination box body having a substantially J-shaped cross section comprising a curtain plate erected on an edge of the connecting plate so as to be orthogonal to the plate and opposed to the back plate, and a light source socket as the illumination box body comprising of a socket mounting means for positioning on the inside, the socket attachment means, Ri Na installation distance of the socket from the connecting plate is configured to be variable, the socket mounting means, the back A partition plate that is arranged orthogonal to the plate, the connecting plate, and the curtain plate, and partitions the inner space of the lighting box body in the material axis direction, a socket mounting plate that is disposed between the partition plates and to which the socket is attached, and the socket. It is composed of a fitting projection member that fits into a fitting recess formed on the rear side of the mounting plate and on the opposite side of the partition plate, and a fitting hole is formed on each facing surface of the partition plate. Then, the base of the fitting projection member is detachably fitted into the fitting hole .

Moreover, the indirect lighting unit according to the present invention as described in claim 3, the back plate is in contact fixed to the wall, erected been tie plate and the tie on its edge as to be perpendicular to the back plate An illumination box body having a substantially J-shaped cross section comprising a curtain plate erected on an edge of the connecting plate so as to be orthogonal to the plate and opposed to the back plate, and a light source socket as the illumination box body comprising of a socket mounting means for positioning on the inside, the socket attachment means, Ri Na installation distance of the socket from the connecting plate is configured to be variable, socket-side mounting of the socket is attached And a back plate side mounting portion orthogonal to the L-shaped bracket to form the socket mounting means, and a groove hole is formed in the back plate side mounting portion, and a screw inserted through the groove hole. L-shaped bracket The is obtained by adapted to secure to the back plate.

  In the indirect lighting unit according to the present invention, a back plate that abuts and is fixed to the wall surface, a connecting plate that is erected on the edge so as to be orthogonal to the back plate, a back plate that is orthogonal to the connecting plate, A long lighting box body having a substantially J-shaped cross section is configured with a curtain plate erected on the edge of the connecting plate so as to face each other, and a light source socket is provided inside the lighting box body. Although it arrange | positions via a socket attachment means, this socket attachment means is comprised so that the installation distance of the socket from a connecting plate may become variable.

  In such a configuration, when the socket is disposed inside the lighting box body, the installation distance of the socket from the connecting plate of the lighting box body is adjusted by the socket mounting means.

  In this way, the installation position of the socket changes from the back to the front of the lighting box body, in other words, from the position close to the connecting plate to the position away from the connecting plate. Along with this, the light from the light source attached to the socket is gradually reduced in the degree of being shielded by the curtain, and the irradiation angle is increased.

  In other words, when the socket is arranged at the back of the lighting box body, the light emitted from the light source is shielded by the curtain plate and the irradiation angle is limited. When mounted on a wall near the ceiling so as to be horizontal (hereinafter referred to as a ceiling type), the irradiation range to the ceiling is reduced, and the lighting box body is mounted on an orthogonal wall surface so that its axis is vertical. When attached to the joint (hereinafter referred to as the wall type), the irradiation range on the orthogonal wall is reduced, and in either case, the difference in illuminance between the bright part of the irradiation range and the dark part outside it increases. The cut-off line appears clearly.

  On the contrary, when the socket is placed in front of the lighting box body, the light emitted from the light source is shielded by the curtain and the irradiation angle is widened. In the case of wall type, the irradiation range on the orthogonal wall is increased, and in either case, the difference in illuminance between the bright part of the irradiation range and the dark part outside it becomes small and the cut-off line becomes It becomes calm and less noticeable.

  Therefore, according to the indirect lighting unit according to the present invention, it is possible to arrange the light source at an optimum position so that the cut-off line does not occur and the light from the light source does not directly enter the eyes, and the irradiation range of the light source If the cutoff line is smaller than the expected range and a cut-off line occurs, installing the socket in front of the lighting box body can widen the irradiation range and make the cut-off line inconspicuous. If the light enters the eyes and is dazzling, the illumination range can be narrowed so that the light from the light source does not enter the field of view by installing the socket in the back of the lighting box body.

The first configuration of the socket mounting means includes a socket mounting plate to which the socket is mounted, and a fitting recess formed on the back plate side edge and the curtain plate side edge on the back surface of the socket mounting plate. In addition to forming a fitting hole on the opposite surface of the back plate and the curtain plate, the base of the fitting protrusion member is detachably fitted into the fitting hole. To do .

In addition, as a second configuration of the socket mounting means, a partition plate that is disposed orthogonally to the back plate, the connecting plate, and the curtain plate and partitions the inner space of the lighting box body in the material axis direction, and the socket disposed between the partition plates And a fitting projection member that fits into a fitting recess formed on the opposite side of the rear surface of the socket mounting plate and opposite to each other. respectively on the opposing surfaces to form a fitting hole base of the fitting projection member fitting hole is configured to be removably fitted in.

  In each configuration described above, the fitting protrusion member and the fitting recess into which it fits are so-called dowels and dowel holes, and the socket installation height can be adjusted up and down by forming dowel holes as appropriate. Can do.

  That is, in these structures, since the socket mounting plate is received by the dowel, it is limited to the ceiling type.

On the other hand, as a third configuration , the socket mounting means is configured as an L-shaped bracket including a socket side mounting portion to which the socket is mounted and a back plate side mounting portion orthogonal thereto, and a groove is formed in the back plate side mounting portion. A hole is formed, and the L-shaped bracket is configured to be fixed to the back plate with a screw inserted through the groove hole . Such a configuration can be applied to both a ceiling type and a wall surface type.

The whole perspective view of the indirect lighting unit concerning a 1st embodiment. It is a figure of the indirect lighting unit which similarly concerns on 1st Embodiment, (a) is a vertical sectional view seen from the side, (b) is a vertical sectional view along an AA line, (c) is a BB line. FIG. Explanatory drawing which showed the effect | action of the indirect illumination unit which concerns on 1st Embodiment. The top view of the indirect lighting unit which concerns on 2nd Embodiment. It is a figure of the indirect lighting unit which similarly concerns on 2nd Embodiment, (a) is a vertical sectional view which follows a CC cross section, (b) is a vertical sectional view which follows a DD line. The whole perspective view of the indirect lighting unit concerning a 3rd embodiment. It is a figure of the indirect lighting unit which similarly concerns on 3rd Embodiment, (a) is a vertical sectional view, (b) is a horizontal sectional view. Explanatory drawing which showed the effect | action of the indirect illumination unit which concerns on 3rd Embodiment.

  Hereinafter, an embodiment of an indirect lighting unit according to the present invention will be described with reference to the accompanying drawings. Note that components that are substantially the same as those of the prior art are assigned the same reference numerals, and descriptions thereof are omitted.

(First embodiment-ceiling type-)

  FIG. 1 is an overall perspective view showing an indirect lighting unit 1 according to this embodiment, and FIG. 2 is a vertical sectional view of the same. As can be seen from these drawings, the indirect lighting unit 1 according to this embodiment includes an illumination box body 2 installed horizontally in the vicinity of the ceiling 21, a socket mounting plate 3, and a dowel 4 as a fitting projection member. It consists of

  The lighting box body 2 includes a back plate 6 that abuts and is fixed to the wall surface 5 near the ceiling 21, a connecting plate 7 that is erected on the floor side edge of the back plate so as to be orthogonal to the back plate, It consists of a curtain plate 8 erected so as to be perpendicular to the pinch plate 7 so as to face the back plate 6 at the leading edge of the link plate, and is configured as a long member having a substantially J-shaped cross section. It is.

  The socket mounting plate 3 can be disposed inside the lighting box body 2 by fastening a socket 10 of a fluorescent lamp 9 as a light source to the surface thereof with screws, bolts, or the like.

  Here, a fitting recess 11 into which the dowel 4 is fitted is formed on the back surface of the socket mounting plate 3 at the back plate side edge portion and the curtain plate side edge portion, respectively, and the back plate 6 and the curtain plate 8 are opposed to each other. On the side surface, a plurality of dowel holes 12 are formed along the vertical direction as fitting holes into which the base of the dowel 4 is detachably fitted. By changing the dowel holes 12 into which the dowels 4 are inserted, The installation distance of the socket mounting plate 3 from the connecting plate 7, in other words, the installation height of the socket mounting plate 3 can be changed. That is, the socket mounting plate 3 and the dowel 4 function as socket mounting means configured so that the installation height of the socket 10 is variable.

  The space formed between the socket mounting plate 3 and the connecting plate 7 can be used as a wiring space, for example.

  In constructing the indirect lighting unit 1 according to the present embodiment, first, the lighting box body 2 is carried into the site, and then the back plate 6 is appropriately cut according to the situation of the construction site.

  That is, the lighting box body 2 blocks the part of the light emitted from the fluorescent lamp 9 by the connecting plate 7 and the curtain plate 8, thereby changing the illumination method by the fluorescent lamp to indirect lighting and the back plate 6. It is possible to attach to the wall surface 5 via the.

  In addition, it is possible to integrate the same cloth as that used for the wall surface 5 so as to be integrated with the wall surface. In such a case, the lighting box body 2 serves as a base for performing the cross finishing.

  Therefore, when the lighting box body 2 is positioned at an appropriate height, the upper portion of the back plate 6 is cut so that the upper edge of the back plate 6 just contacts the ceiling 21 in that state.

  In this way, when cross finishing is performed on the wall surface 5, the upper edge of the back plate 6 does not become a step, and there is no possibility of impairing the appearance of the cross finishing.

  Next, before or after the positioning of the lighting box body 2, it is checked whether or not the light emitted from the fluorescent lamp 9 is appropriately shielded by the curtain plate 8 and no cut-off line is generated on the ceiling 21.

  Here, when the cut-off line appears on the ceiling 21 as shown in FIG. 3 (a), since the shading by the curtain plate 8 is excessive, the dowel hole 12 into which the dowel 4 is inserted is changed to the dowel hole 12 at a higher position. By changing, the installation height of the socket mounting plate 3 is increased.

  On the other hand, as shown in FIG. 3 (b), if the light emitted from the fluorescent lamp 9 enters the eyes and is dazzling, the shading by the curtain plate 8 is insufficient, so the dowel hole 12 into which the dowel 4 is inserted is formed. By changing the dowel hole 12 to a lower position, the installation height of the socket mounting plate 3 is lowered.

  As described above, according to the indirect illumination unit 1 according to the present embodiment, when the irradiation range of the fluorescent lamp 9 as the light source becomes narrower than the assumed range and a cut-off line occurs, the socket mounting plate 3 is removed. By raising and adjusting the installation height of the socket 10 upward, the irradiation range can be expanded so that the cut-off line is not conspicuous.

  On the contrary, when the light from the fluorescent lamp 9 enters the eyes and is dazzling, the irradiation range is narrowed by lowering the socket mounting plate 3 and adjusting the installation height of the socket 10 downward. The light from the lamp 9 can be prevented from entering the field of view.

(Second embodiment-ceiling type-)

  Next, a second embodiment will be described. In addition, about the components substantially the same as 1st Embodiment, the same number is attached | subjected and the description is abbreviate | omitted.

  FIG. 4 is a plan view showing the indirect illumination unit 31 according to the present embodiment, and FIG. 5 is a vertical sectional view of the same. As can be seen from these drawings, the indirect lighting unit 31 according to this embodiment includes the lighting box body 2 installed horizontally in the vicinity of the ceiling 21, the partition plate 32, the socket mounting plate 33, and the fitting protrusion member. As a dowel 4.

  The partition plate 32 is arranged orthogonally to the back plate 6, the connecting plate 7 and the curtain plate 8, and is configured so as to partition the inner space of the lighting box body 2 in the material axis direction, and its peripheral edge. The back plate 6, the connecting plate 7 and the curtain plate 8 are fixed with an adhesive.

  The socket mounting plate 33 is arranged between the partition plates 32 and 32, and the socket 10 of the fluorescent lamp 9 as a light source is fastened to the surface thereof with screws, bolts, etc. It can be arranged inside the lighting box body 2.

  Here, on the back surface of the socket mounting plate 33, the fitting recesses 11 into which the dowels 4 are fitted are respectively formed on the pair of partition plate side edges opposite to each other, and the opposing side surfaces of the partition plates 32, 32. Are formed with a plurality of dowel holes 12 as fitting holes into which the base of the dowel 4 is detachably fitted, and by changing the dowel holes 12 into which the dowels 4 are inserted, The installation distance of the socket mounting plate 33 from the connecting plate 7, in other words, the installation height of the socket mounting plate 33 can be changed. That is, the partition plate 32, the socket mounting plate 33, and the dowel 4 function as socket mounting means configured such that the installation height of the socket 10 is variable.

  The space formed between the socket mounting plate 33 and the connecting plate 7 can be used as a wiring space, for example.

  In constructing the indirect lighting unit 31 according to the present embodiment, first, as in the first embodiment, after the illumination box body 2 is carried into the site, the back plate 6 is appropriately cut according to the situation of the construction site.

  Next, before or after the positioning of the lighting box body 2, it is checked whether or not the light emitted from the fluorescent lamp 9 is appropriately shielded by the curtain plate 8 and no cut-off line is generated on the ceiling 21.

  Here, when the cut-off line appears on the ceiling 21, since the light shielding by the curtain plate 8 is excessive, the socket mounting plate 33 is changed by changing the dowel hole 12 into which the dowel 4 is inserted into the dowel hole 12 at a higher position. Increase the installation height.

  On the other hand, if the light emitted from the fluorescent lamp 9 enters the eyes and is dazzling, the shading by the curtain plate 8 is insufficient, so that the dowel hole 12 into which the dowel 4 is inserted is changed to the dowel hole 12 at a lower position. By changing, the installation height of the socket mounting plate 33 is lowered.

  As described above, according to the indirect illumination unit 31 according to the present embodiment, when the irradiation range of the fluorescent lamp 9 as the light source becomes narrower than the assumed range and a cut-off line occurs, the socket mounting plate 33 is removed. By raising and adjusting the installation height of the socket 10 upward, the irradiation range can be expanded so that the cut-off line is not conspicuous.

  On the contrary, if the light from the fluorescent lamp 9 enters the eyes and is dazzling, the socket mounting plate 33 is lowered and the installation height of the socket 10 is adjusted downward, thereby narrowing the irradiation range and fluorescent light. The light from the lamp 9 can be prevented from entering the field of view.

  Further, according to the indirect lighting unit 31 according to the present embodiment, the periphery of the partition plate 32 is fixed to the back plate 6, the connecting plate 7, and the curtain plate 8 with an adhesive, so that the partition plate is interposed via the dowel 4. In addition to serving to receive the socket mounting plate 33, it also serves to reinforce the lighting box body 2.

  Further, according to the indirect lighting unit 31 according to the present embodiment, the dowel hole 12 is formed in the opposite side surface of the partition plates 32, 32 so that the base portion of the dowel 4 can be freely inserted into the dowel hole, and the socket mounting plate 33. The socket mounting plate 33 is bridged between the partition plates 32 and 32 by fitting the above-described dowels 4 into the fitting recesses 11, so that the socket mounting plate 33 can be easily removed from the lighting box body 2. Is possible.

  Therefore, dust accumulated on the socket mounting plate 33 can be easily removed, and there is no fear that dust accumulates inside the lighting box body 2, thus providing an indirect lighting unit in consideration of maintenance.

  Further, according to the indirect lighting unit 31 according to the present embodiment, since the dowel holes 12 are formed on the opposite side surfaces of the partition plates 32, 32, the back plate 6 and the curtain plate 8 which are long objects are processed. Is no longer necessary, and manufacturing is easier than in the first embodiment.

(Third embodiment-wall surface type-)

  Next, a third embodiment will be described. In addition, about the components substantially the same as 1st Embodiment, the same number is attached | subjected and the description is abbreviate | omitted.

  FIG. 6 is an overall perspective view showing the indirect lighting unit 41 according to the present embodiment, and FIG. 7 is a vertical sectional view and a horizontal sectional view as seen from the front direction. As can be seen from these drawings, the indirect lighting unit 41 according to the present embodiment includes the lighting box body 2 installed vertically on the wall surface 42a located in the vicinity of the wall surface 42b among the wall surfaces 42a and 42b that are perpendicular to each other. In this embodiment, the lighting box body 2 abuts and fixes the back plate 6 to the wall surface 42a.

  The L-shaped bracket 43 includes a socket side mounting portion 44 to which the socket 10 of the fluorescent lamp 9 is mounted and a back plate side mounting portion 45 orthogonal to the socket side mounting portion 45, and a slot 46 is formed in the back plate side mounting portion 45. The L-shaped bracket 43 is fixed to the back plate 6 with a screw 47 formed and inserted through the groove.

  In constructing the indirect lighting unit 41 according to the present embodiment, first, the lighting box body 2 is carried into the site, and then the back plate 6 is appropriately cut according to the situation of the construction site.

  That is, the lighting box body 2 blocks the part of the light emitted from the fluorescent lamp 9 by the connecting plate 7 and the curtain plate 8, thereby changing the illumination method by the fluorescent lamp to indirect lighting and the back plate 6. It enables attachment to the wall surface 42a via

  In addition, it is possible to integrate the same cloth as that used for the wall surfaces 42a and 42b, so that it can be integrated with the wall surface. In such a case, the lighting box body 2 is a base for performing the cloth finish.

  Therefore, when the lighting box body 2 is positioned at an appropriate distance from the wall surface 42b, the side of the back plate 6 is cut so that the edge of the back plate 6 just contacts the wall surface 42b in that state.

  In this way, when performing the cross finishing on the wall surfaces 42a and 42b, the side edge portion of the back plate 6 does not become a step, and there is no possibility of impairing the appearance of the cross.

  Next, before or after the positioning of the lighting box body 2, it is checked whether or not the light emitted from the fluorescent lamp 9 is appropriately shielded by the curtain plate 8 and the wall surface 42 b is not cut off.

  Here, when the cut-off line appears on the wall surface 42b as shown in FIG. 8 (a), since the light shielding by the curtain plate 8 is excessive, the screw 47 is once loosened, and then the installation position of the socket 10 is the lighting box body. In FIG. 6 (a), the L-shaped bracket 43 is slid leftward so as to move to the front from the back of 2, and the screw 47 is tightened and fixed at a desired position.

  On the other hand, as shown in FIG. 8 (b), if the light emitted from the fluorescent lamp 9 enters the eyes and is dazzling, the shading by the curtain plate 8 is insufficient, so the screws 47 are once loosened, and then the socket In FIG. 8B, the L-shaped bracket 43 is slid in the right direction so that the installation position of 10 moves from the front side to the back side of the lighting box body 2, and the screw 47 is tightened and fixed at the desired position.

  As described above, according to the indirect lighting unit 41 according to this embodiment, when the irradiation range of the fluorescent lamp 9 that is a light source becomes narrower than the assumed range and a cut-off line occurs, the socket 10 becomes the lighting box. By sliding the L-shaped bracket 43 horizontally so that it is installed not in the back of the body 2 but in front, the irradiation range can be expanded so that the cut-off line is not conspicuous.

  On the contrary, when the light from the fluorescent lamp 9 enters the eyes and is dazzling, the L-shaped bracket 43 is slid horizontally so that the socket 10 is installed not in front of the lighting box body 2 but in the back. By doing so, it is possible to narrow the irradiation range and prevent the light from the fluorescent lamp 9 from entering the field of view.

  In the present embodiment, the example in which the indirect illumination unit 41 is used as the wall surface type has been described. However, it is also possible to use the indirect lighting unit 41 as a ceiling type as in the first and second embodiments.

1,41 Indirect lighting unit 2 Lighting box body 3 Socket mounting plate (socket mounting means)
4 Dowels (fitting protrusions, socket mounting means)
6 Back plate 7 Tether plate 8 Curtain plate 9 Fluorescent lamp (light source)
10 Socket 11 Fitting recess 12 Dowel hole (fitting hole)
43 L-shaped bracket (Socket mounting means)
44 Socket side mounting portion 45 Back plate side mounting portion 46 Groove hole 47 Screw

Claims (3)

A back plate abutting and fixed to the wall surface, a connecting plate standing on the edge so as to be orthogonal to the back plate, and an edge of the connecting plate so as to be orthogonal to the connecting plate and opposed to the back plate An illumination box body having a substantially J-shaped cross section and a socket mounting means for disposing a light source socket inside the illumination box body; , Ri Na installation distance of the socket from the connecting plate is configured to be variable, the socket mounting means, and a socket mounting plate, wherein the socket is attached, the back plate a back side of the socket mounting plate A fitting projection member that fits into a fitting recess formed in each of the side edge and the curtain side edge, and a fitting hole is formed in each of the opposing surfaces of the back plate and the curtain. In the fitting hole, the fitting protrusion Indirect illumination unit, characterized in that the base of the member is to be removably fitted. A back plate abutting and fixed to the wall surface, a connecting plate standing on the edge so as to be orthogonal to the back plate, and an edge of the connecting plate so as to be orthogonal to the connecting plate and opposed to the back plate An illumination box body having a substantially J-shaped cross section and a socket mounting means for disposing a light source socket inside the illumination box body; , Ri Na is configured as the installation distance of the socket from the connecting plate is variable, the socket attachment means, said back plate, said connecting plate and quadrature arranged the illuminating box body with respect to the curtain plate A partition plate for partitioning the inner space of the socket in the material axis direction, a socket mounting plate disposed between the partition plates to which the socket is mounted, and a partition plate side edge that is the back side of the socket mounting plate and opposite to each other The And a fitting projection member that fits into the fitting recess, and a fitting hole is formed in each facing surface of the partition plate, and the base of the fitting projection member is detachably fitted into the fitting hole. An indirect lighting unit characterized by being made. A back plate abutting and fixed to the wall surface, a connecting plate standing on the edge so as to be orthogonal to the back plate, and an edge of the connecting plate so as to be orthogonal to the connecting plate and opposed to the back plate An illumination box body having a substantially J-shaped cross section and a socket mounting means for disposing a light source socket inside the illumination box body; , Ri Na installation distance of the socket from the connecting plate is configured to be variable, with said socket-side attachment portion socket is mounted and the back plate side mounting portion perpendicular thereto constitute an L-shaped bracket The socket mounting means, and a groove hole is formed in the back plate side mounting portion, and the L-shaped bracket is fixed to the back plate with a screw inserted through the groove hole. Indirect lighting unit Tsu door.

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