JPH09265811A - Recessed type ceiling luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrict generation of warping at the end longitudinally of a luminaire main body and improve appearance in a ceiling-attached state by providing a deformation shutdown means made of one opening at the plate end side between an end plate and a luminaire mounting hole. SOLUTION: An assembled liminaire main body is inserted beneath a luminaire recessed opening of a ceiling E with a top plate 33 upward. With this insertion, the lower end of two suspension bolts 57 are inserted into a luminaire mounting hole 56 of a plate 33, respectively, upwardly. In this case, the recessed depth of the luminaire main body is restricted by abutting of expansions 35 and 48 at the lower edge of the main body on the edge lower face beneath the opening. Then, a washer 58 and a nut 59 are spirally fitted to the bolt 57 and are tightened. Such mounting excessively tightens the nut 59 so as to closely contact with edges 53 and 48 beneath the opening, and the longitudinal end of the plate 33 is formed. However, a top plate end side part 33a between a hole 56 and an end plate 32 are provided with an opening 60 and the strength of the part 33a is degraded more than the other part. Thereby, deformation to the plate 32 due to tightening is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling-embedded luminaire which is used by being embedded in the ceiling of an office building or a store.

[0002]

2. Description of the Related Art FIG. 13 is a perspective view showing the entire structure of a conventional ceiling-embedded lighting fixture. This fixture has a partition with a V-shaped cross section inside a main body 1 of which the lower surface is opened. The V-shaped reflector 2 for use is mounted, and the straight tube fluorescent lamps 4 supported by the lamp sockets 3 are arranged on both sides of the V-shaped reflector 2.

As shown in FIGS. 13 to 16, the instrument main body 1 is formed of a reflecting plate 7 made of sheet metal and end plates 8 made of sheet metal welded to both ends of the reflecting plate 7 in the longitudinal direction. ing. The reflector 7 is formed by bending diagonal side plates 7b on both sides of a pair of top plates 7a with reinforcing beads so as to be arranged in a V shape.

As shown in FIGS. 14 and 15, the end plate 8 has a plurality of fixing pieces 8a which overlap the outer surface of the end of the top plate 7a.
Is bent, and a fixing piece 8b that overlaps the outer surface of the end portion of the side plate 7b is bent between them. The reflection plate 7 and the end plate 8 are connected by superimposing the plurality of fixing pieces 8a and 8b on the outer surface of the end portion of the reflection plate 7 and welding the portions by spot welding or the like.

Further, as shown in FIG. 14 and the like, the side plate 7b
These seams 9 are formed on the upper surface of the end edge of the projecting edge portion 7c formed by projecting outward from the lower edge of the end plate and the end portion of the projecting edge portion 8c formed by projecting outward from the lower edge of the end plate 8. The fitting body 10 made of metal is provided so as to be covered with the fitting body 10, and the board 10 is welded to the continuous protruding edges 7c and 8c to assemble the instrument body 1.

In FIG. 16, 5 is a mounting bracket for the V-shaped reflector 2, and 6 are individually mounted on both ends of the instrument body 1 in the longitudinal direction, and wiring from the inside of the V-shaped reflector 2 to the lamp socket 3 ( It is a gutter-shaped line hiding for covering (not shown).

The top plate 7a of the instrument body 1 is provided with elliptical instrument attachment holes 11 (only one of which is shown in FIGS. 14 and 15) at the widthwise center positions of both longitudinal ends thereof. . In addition, as shown in FIGS. 17 and 18, an instrument-embedded opening 12a corresponding to the shape of the instrument body 1 is formed in the indoor ceiling 12, and a pair of the device-embedded openings 12a supported by the body of the building are provided on the opening 12a. A suspension bolt 13 (only one is shown) is arranged.

Then, as shown in FIG. 17, the instrument main body 1 is mounted by being embedded in the indoor ceiling 12 as follows. First, the projecting edges 7c, 8 of the device body 1
The c is brought into contact with the lower surface of the edge of the appliance embedding opening 12a in the indoor ceiling 12, and the hanging bolt 13 on the back of the ceiling is inserted into the appliance mounting hole 11 from above. next,
A washer 14 is fitted into the bolt 13 from below the top plate 7a, and a nut 15 is screwed into the bolt 13 to remove the nut 15.
Tighten.

By screwing the nut 15 into the suspension bolt 13, the instrument body 1 is embedded in the indoor ceiling 12 and attached. Then, in this attachment, the instrument body 1
In order to eliminate the gaps between the overhanging edges 7c and 8c of the above and the interior ceiling 12 and to improve the mutual adhesion, it is essential to tighten the nut 15 quite strongly.

Further, a two-dot chain line in FIG. 13 indicates another ceiling-embedded type illumination provided adjacent to the ceiling-embedded luminaire fixed to the interior ceiling 12 as described above in the longitudinal direction thereof. Shows the equipment. In this way, in the linear arrangement of the lighting fixtures that are continuous in a row, the overhanging edge portions 8c of the end plates 8 of the adjacent fixture bodies 1 are in contact with each other and are continuous.

[0011]

According to the above procedure, the nut 15 is strongly tightened when the instrument main body 1 is embedded in the indoor ceiling 12 and attached, and the length of the top plate 7a of the reflection plate 7 is increased as shown in FIG. It is inevitable that the end in the direction is lifted by the nut 15 around the instrument mounting hole 11.

The influence of the deformation of the end portion of the top plate 7a in the longitudinal direction due to the strong tightening of the nut 15 has a pervasive effect on the periphery thereof. That is, the end plate 8 connected to the end of the top plate 7a in the longitudinal direction is affected by the deformation of the top plate 7a with the central portion in the width direction being the maximum point of action, and the side plate 7b is also acted. On the other hand, the influence of the deformation of the top plate 7a acts with the side plate portions located on both sides in the width direction passing through the device mounting holes 11 of the top plate 7a as the maximum action points.

Therefore, the projecting edge portion 8c of the end plate 8 is easily deformed by warping upward with the central portion in the longitudinal direction as the maximum displacement portion, as shown by the chain double-dashed line in FIGS. It should be noted that J in FIG. 16 indicates the maximum amount of warp of the overhanging edge portion 8c, and such upward warp deformation is particularly likely to occur when the end plate 8 is made of synthetic resin. Similarly, as shown by the solid line in FIG. 18, the longitudinal end of the overhanging edge portion 7c of the side plate 7b warps upward due to the deformation as the maximum displacement point. Easy to deform. Note that K in FIG. 18 indicates the maximum warp amount of the overhanging edge portion 7c. As described above, in the conventional lighting fixture, due to the tightening of the nut 15, the overhanging edge portions 7c and 8c are likely to be warped and deformed at the ends of the fixture body 1 in the longitudinal direction. There is a problem that the appearance with the attached is not good. In particular, as shown in FIG. 13, when a plurality of lighting fixtures are mounted in a line-shaped arrangement in which they are arranged in a row, if there is a warp deformation as described above, the projecting edge portion 8 between the adjacent fixture main bodies 1 is increased.
Since there is a step between c and the step becomes conspicuous, there is a problem that the appearance is likely to be damaged.

Therefore, the first problem to be solved by the present invention is to suppress the occurrence of warpage at the longitudinal end portion of the instrument body accompanying the attachment of the instrument body to the ceiling,
It is to obtain a ceiling-embedded luminaire that can improve the appearance when mounted on the ceiling.

A second problem to be solved by the present invention is to obtain a ceiling-embedded luminaire in which the first problem can be solved with a simple structure.

[0016]

SUMMARY OF THE INVENTION According to the present invention, there are provided a reflection plate having side plates bent downward from both side edges of a horizontal top plate, and end plates connected to both ends in the longitudinal direction of the reflection plate. Having an instrument body of a lower surface opening having a side edge and a lower edge of the end plate provided with continuous overhanging edges, the instrument body is passed through an instrument embedding opening formed in the ceiling, A hanging bolt that is brought into contact with the projecting edge portion on the lower surface of the edge portion of the embedding opening, and is passed from above through instrument mounting holes that are respectively opened at the widthwise central positions at both longitudinal ends of the top plate, A ceiling-embedded lighting fixture that is attached to this bolt via a nut screwed from below the top plate is assumed.

In order to solve the first problem, the invention of claim 1 provides a top plate end portion between the end plate and the instrument mounting hole at least in the width direction of the top plate end portion. It is characterized in that a deformation blocking means including at least one opening is provided at the central portion.

In the invention of claim 1, the deformation blocking means lowers the strength of the top plate end side portion between the device mounting hole and the end plate of the device body in the top plate of the reflection plate of the device body. Thus, the deformation of the top plate end side portion is facilitated as compared with other portions. As a result, when the instrument body inserted into the instrument embedding opening in the ceiling is attached by tightening the nuts screwed into the hanging bolts in the ceiling, the strength is reduced if excessive tightening is performed. In addition, the deformation is concentrated on a part of the top plate end side portion to reduce the influence of excessive tightening on the end plate and the like.

In order to solve the second problem,
According to a second aspect of the invention, the deformation blocking means is formed by a single slit-shaped elongated opening extending in the width direction of the top plate end side portion.

In the invention of claim 2, since the deformation blocking means is a single slit-shaped elongated opening, the structure is simple, and the elongated opening has a width direction of the top plate end side portion. Since it extends to the end plate, the influence of excessive tightening of the nut on the end plate side is reliably blocked in this elongated opening.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view showing the configuration of the entire ceiling-embedded luminaire according to the first embodiment. This luminaire is for, for example, two lights, and has an indoor ceiling E (see FIG. 2 and the like). It is installed by being embedded in. As shown in FIGS. 1 and 6, this lighting fixture has a fixture main body 21 whose lower surface is opened, a V-shaped reflector 23 mounted inside the fixture main body 21 via a reflector mounting fixture 22, and the reflector 23. A lighting device 24 such as a discharge lamp ballast fixed to the fixture body 21 on the back side of the lamp, and a lamp socket 25.
And a straight-tube type fluorescent lamp 26 detachably supported over a lamp socket 25 which is spaced apart in the longitudinal direction of the instrument body 21.

As shown in FIG. 1, the instrument main body 21 includes one reflector 31 having an inner surface as a reflecting surface, and this reflector 31.
Is formed by a pair of left and right end plates 32 that are individually closed at both longitudinal ends.

The reflection plate 31 forming the main part of the instrument body 21 is made of, for example, a white color steel plate. This reflector 31 is
As shown in FIGS. 4 to 6, a top plate 3 having a horizontal flat plate shape.
The side plates 34 are formed by bending the side plates 34 on both sides in the width direction. The pair of side plates 34 are obliquely bent at an obtuse angle with, for example, the top plate 33, and are arranged in a V-shape as shown in FIG.

Overhanging edges 35 are provided at the lower edges of the side plates 34 so as to project outward. These edges 35 are
An overhanging base 35a that is horizontally bent from the lower edge of the side plate 34, and an upright portion 3 that is vertically uprighted from the overhanging end.
5b and 5b to form a substantially L-shaped cross section. Therefore, the overhanging edge portion 35 and the side plate 34 connected to the overhanging edge portion 35 form a groove A that extends over the entire length of the reflecting plate 31 in the longitudinal direction and has an open upper surface.

The upright portion 35b is folded back in a U-shaped cross section. This folded portion faces the groove A. As shown in FIGS. 5 and 7, a pair of slits 36 facing the groove A and a cut-and-raised piece 37 formed between the slits 36 are formed at both ends in the longitudinal direction of the standing portion 35b.

A pair of oval fixing holes 38 and one screw receiving hole 39 are formed at both ends in the longitudinal direction of the reflecting plate 31, as shown in FIG. The pair of fixing holes 38 are provided at both ends in the width direction at the end of the top plate 33 of the reflection plate 31, and the screw receiving holes 39 are formed in the reflection plate 31.
It is provided on a raised portion formed at the center position in the width direction at the end of the top plate 33.

As shown in FIGS. 4 and 5, the top plate 3
Elliptical instrument attachment holes 56 extending in the longitudinal direction of the top plate 33 are formed in the widthwise central positions of both ends of the top plate 33 in the longitudinal direction. The fixture body 2 is attached to the mounting hole 56.
A suspension bolt 57 for embedding and mounting 1 in the ceiling is passed through. A washer 58 is fitted to the bolt 57 and supports the washer 58 to support a nut 59.
Is screwed. The two hanging bolts 57 project downward from the ceiling slab of the skeleton of the building, and are provided on the instrument-embedded opening F formed in the indoor ceiling E so as to face both ends in the longitudinal direction of the opening F, respectively. There is.

The instrument embedding opening F is provided in a shape corresponding to the shape of the instrument body 21, and is a rectangular opening smaller than a quadrangle formed by the continuous projecting edges 35 and 48 (described later) of the instrument body 21. . When a plurality of ceiling-embedded lighting fixtures are arranged in a line by arranging them in a longitudinal direction in a line, the fixture-embedded opening F is formed to have a length corresponding to the number of the fixtures arranged in parallel.

Furthermore, FIGS. 3 to 5, FIG. 10, and FIG.
As shown in FIG. 1, at both ends in the longitudinal direction of the top plate 33, the top plate end side portion 33 between the instrument mounting hole 56 and the end plate 32 is provided.
A single elongated opening 60 having a slit shape is provided at a. The opening 60 is used as a deformation blocking unit for blocking the propagation of the deformation of the top plate 33 due to the tightening of the nut 58 so as not to spread to the end plate 32 side. Therefore, it is provided at least at the center portion in the width direction of the top plate end side portion 33a.

In the first embodiment, the top plate end portion 33a is formed so as to extend in the width direction and its entire length is made longer than the width of the V-shaped reflector 23. is there. Moreover, the opening 60 having such a configuration is provided closer to the end plate 32 side than the instrument mounting hole 56. As a result, both longitudinal end portions of the opening 60 projectingly arranged on both sides of the V-shaped reflector 23 in the width direction are substantially directly above the filament portion which is the highest temperature portion of the fluorescent lamp 26 supported by the lamp socket 25. Positioned, the instrument body 21
It is designed to be used as a heat dissipation hole to the outside.

The pair of left and right end plates 32 is a PBT or AB.
It consists of a molded product of synthetic resin such as S. Set these end plates 32 to P
In this embodiment, which is molded from BT (polybutylene terephthalate), it is possible not only to obtain high flame retardancy (flame retardancy of V0 in the flame retardant grade of the standard that defines the flame retardancy) in the end plate 32, but also to reflect it. It is possible to obtain a white-colored molding that is the same as the color steel plate that forms the plate 31, and it is excellent in that it has good reflection characteristics.

As shown in FIGS. 3 to 6, the edge portions other than the lower edge of the end plate 32 have first and second end plate flange portions.
The outer protruding portions 41 and 42 and the inner protruding portion 43 are integrally provided. There are a pair of first outer protrusions 41, which are bent at right angles from both side edges of the end plate 32 that are inclined, and are provided so as to cover most of the end outer surface of the corresponding side plate 34 of the reflection plate 31. Has been. The second outer protrusion 42 is one, and is bent at a right angle from the center of the upper edge of the end plate 32 so as to cover the center of the outer surface of the end of the top plate 33 of the corresponding reflector 31. It is provided.

The outer reflecting portion 42 is provided with a through hole 44 facing the screw receiving hole 39, and the end plate 32 is fixed by the screw 45 screwed into the screw receiving hole 39 through the through hole 44. It is fixed to the reflection plate 31. Therefore, the screw receiving hole 39 and the screw 45 form the first retaining means. This means is more reliable for the reflector 3
Although it was provided to prevent the end plate 32 from coming off from 1,
This can be omitted.

There are a pair of inner protruding portions 43, which are bent at a right angle from the edge portion between the first and second outer protruding portions 41, 42 of the end plate 32, and which correspond to the reflecting plate 3.
It is provided so as to overlap the inner surface of one end. These inner protrusions 43 and the first and second outer protrusions 41, 42
Slits 46 (see FIG. 5) are formed between the adjacent ends of each. Therefore, the protrusions 41 to 43 are continuously provided through the slit 46 to both side edges and the upper edge of the end plate 32.

The pair of inner protrusions 43 have a corner shape corresponding to the corner formed by the top plate 34 and the side plate 34 of the reflection plate 31, and overlap the inner surface of the corner of the reflection plate 31. There is. Moreover, locking projections 47 are integrally provided on the upper surfaces of the inner protruding portions 43 so as to correspond to the fixing holes 38. The locking protrusion 47 has a locking surface that rises vertically with respect to the upper surface of the inner protruding portion 43 on the outer surface side of the end plate 32, and goes from this locking surface to the tip side of the inner protruding portion 43. It has a right-angled triangular shape in a side view with an inclined surface that gradually decreases. These locking projections 47 are adapted to enter the fixing holes 38 and hook the locking surfaces thereof to the fixing holes 38 to fix the end plate 32 to the reflecting plate 31. Therefore, the fixing hole 38 and the locking convex portion 47 form a second retaining means.

The lower edge of the end plate 32 is provided with a projecting edge portion 48 projecting outward. The edge 48 is formed by the end plate 3
2 overhanging base 48a horizontally bent from the lower edge
And an upright portion 48b that is vertically upright from the overhanging end, and is formed in a substantially L-shaped cross section. Therefore, a groove B having an open upper surface is formed at the lower end of the end plate 32, extending over the entire length in the width direction thereof. Both ends of the groove B are connected to the ends of the groove A provided in the reflection plate 31.

At both ends of the end plate 32 in the width direction, connecting protrusions 49 integrally provided at both ends of the projecting edge portion 48 are provided. As shown in FIG. 5, the protrusion 49 is inserted into a groove provided in the reflection plate 31, and is protruded vertically upward from the side of the protrusion base 49a that overlaps the upper surface of the overhanging base 35a. 4 which is erected so as to be inserted into the erected portion 35b having an inverted U-shaped cross section.
9b and L-shaped.

A step 50 (see FIG. 9) is formed between the connecting convex portion 49 and the projecting edge portion 48. Step 50
Is provided in a substantially L shape over the lower surface of the convex base 49a and the outer surface and the upper end surface of the insertion portion 49b, and the depth thereof is the same as the plate thickness of the reflection plate 31. Thereby, when the end plate 32 is connected to the reflection plate 31 and the instrument main body 21 is assembled, the continuous overhanging bases 35a and 48a are flush with each other, and similarly, the rising portions 35b and 48 are continuously connected to each other.
The outer surface of b is flush with the upright portions 35b, 48.
The upper end surface of b is flush with each other so that a good appearance of the device main body 21 is exhibited.

The insertion portion 49b is formed in a tapered shape so that it can be easily inserted into the upright portion 35b. The insertion portion 49b is provided with a cutout groove 51 from its upper surface. As shown in FIGS. 8 and 9, the cut-and-raised piece 37 is inserted into and engaged with the cutout groove 51, whereby the end plate 32 is fixed to the reflection plate 31. Therefore, the cut-and-raised piece 37 and the cutout groove 5
Reference numeral 1 constitutes a third retaining means.

Further, as shown in FIGS. 2 and 5, the end plate 32 is provided with two pairs of socket mounting holes 52, and the lamp sockets 25 are directly attached to the inner surface of the end plate 32 by using these holes. It is installed.

That is, as shown in FIGS. 5 and 6, the lamp socket 25 has locking projections 25a integrally projected to the back side on both sides in the width direction of the synthetic resin socked body. A retaining head is formed at the projecting ends of the pair of projecting portions 25a. The lamp socket 25 provided with the locking projection 25a is configured such that the projection 25a is passed through the corresponding pair of socket mounting holes 52 through its elastic deformation, and the retaining head is engaged with the holes 52. , Is attached to the end plate 32 without using screws or other fixing parts. A fluorescent lamp 26 is detachably attached and supported between the lamp sockets 25 facing each other in the longitudinal direction of the instrument body 21.

As shown in FIGS. 2 and 5, a feed wiring through hole 54 and a pair of metal fitting mounting holes 55 located on both sides of the feed wiring through hole 54 are provided in the widthwise center of the end plate. . When a plurality of lighting fixtures are arranged side by side in the longitudinal direction to form a linear arrangement, a connecting metal fitting is provided between adjacent lighting fixtures to connect end plates of the adjacent lighting fixtures facing each other. It is fixed to the outer surface of the end plate 32 by a screw passing through the metal fitting mounting hole 55.

The reflector mount 22 is mounted on the top plate 33 of the reflector 31, and the V-shaped reflector 23 is mounted on the inner surface of the reflector 31 via these. This V
The shape reflection plate 23 has a length substantially equal to the length between the inner surfaces of the end plates 32 in the instrument body 21, is arranged in the widthwise central portion of the reflection plate 31, and the fluorescent lamps 26 are provided on both sides thereof.
Are arranged respectively. A lighting device 24 is attached to the top plate 33 so as to be covered with the V-shaped reflector 23.

The luminaire main body 21 of the luminaire having the above construction is assembled as follows. First, as shown in FIG. 5, the end plates 32 are opposed to both ends in the longitudinal direction of the reflection plate 31, and the connecting convex portion 49 and the overhanging edge portion 35 of the reflection plate 31 are aligned, and then the reflection plate 31 of the reflection plate 31 is aligned. The end plates 32 are assembled so that they fit into the ends.

As a result, first, the connecting convex portion 49 is inserted into the groove A formed by the side plate 34 of the reflecting plate 31 and the projecting edge portion 35 with a slight press fit, and at the same time, the inserting portion 49 of this convex portion 49 is inserted.
b is inserted into the upright portion 35b of the overhanging edge portion 35 with a slight press fit. Then, with the progress thereof, the first outer protruding portion 41 of the end plate 32 causes the top plate 33 at the end of the reflection plate 31.
The outer surface of the central part of the
The outer protrusions 42 overlap the outer surface of the side plate 34 at the end of the reflector 31, and the pair of inner protrusions 43 of the end plate 32 make the top plate 33 and the side plate 34 at the end of the reflector 31 separate. It will overlap with the inner surface of the corner. This combination is the slit 4 between the inner and outer protrusions 41 to 43.
This can be realized by passing the end of the reflection plate 31 through 6.

The fitting work of the end plate 32 to the end portion of the reflection plate 31 is performed by reflecting the reflection plate 3 on the inner surface of the end plate 32 and the step 50.
The process ends when the end face of 1 in the longitudinal direction hits.
As a result, the end plate 32 made of synthetic resin is combined with the reflection plate 31 so as to sandwich the ends of the reflection plate 31 from inside and outside by the projections 41 to 43 inside and outside thereof, and closes the end opening of the reflection plate 31. Is provided.

In this combined state, the inner protruding portion 41
The engagement of ~ 43 with the end of the reflection plate 31 prevents the reflection plate 31 and the end plate 32 from being accidentally separated in the vertical direction. Moreover, by inserting the connecting projection 49 into the groove a formed by the side plate 34 and the projecting edge 35 thereof, the projecting edges 35, 48 of the reflecting plate 31 and the end plate 32 are coupled to each other via the connecting projection 49. Then, the end plate 32 can be temporarily held so as not to come off from the reflection plate 31.

In addition, the reflector 3 is provided on the upper surface of the inner protruding portion 43.
As the corners formed by the top plate 33 and the side plate 34 of the first plate overlap, the inner protrusions 43 are formed in the pair of fixing holes 38 of the reflecting plate 31.
The locking convex portions 47 of are respectively hooked. Therefore, the end plate 32 can be held so as not to come off from the reflection plate 31 even by these engagements.

In the combined state, the cutout groove 51 of the connecting convex portion 49 and the cut-and-raised piece 37 of the standing portion 35b are positioned by the contact of the projecting edge portion 35 with the step 50.

Next, the cut-and-raised piece 37 is deformed from the side plate 34 side, and the cut-out groove 5 is formed as shown in FIGS. 8 and 9.
Then, the groove 51 and the cut-and-raised piece 37 are engaged with each other. By this engagement, it is possible to prevent the connecting convex portion 49 from coming off the protruding edge portion 35 of the reflecting plate 31 without using a fixed component.

Finally, the screw 45 is passed through the through hole 44 of the first outer protruding portion 41, and is screwed into the screw receiving hole 39 of the reflecting plate 31 which is opposed thereto, and is tightened. Thereby, the reflection plate 31 and the end plate 32 are fixed, and the end plate 32 is fixed to the reflection plate 31.
It is possible to prevent accidental disengagement.

According to the above procedure, the instrument main body 21 whose lower surface is opened is assembled. Further, after the instrument main body 21 thus assembled is embedded in the indoor ceiling E and attached by the procedure described later, the V-shaped reflector 23 is attached to the reflector 31 to complete the assembly of the entire instrument. The V-shaped reflector 23 covers the lighting device 24, the tip of the screw 45, and the like. The lamp socket 25 is attached to the inner surface of the end plate 32, and the reflector mounting tool 22, the lighting device 24, and a terminal block (not shown) are attached to the reflector 31 before or after the fixture body 21 is assembled. Be seen.

The lighting fixture thus assembled can be assembled without the need for welding the main body 21 of the fixture as described above.
Accordingly, a color steel plate can be used for the reflection plate 31 and the end plate 32 can be made of synthetic resin that does not require painting, so that painting can be omitted when manufacturing the instrument body 21. Moreover, as described above, the inner and outer protrusions 41 to 43, the connecting protrusion 49, and the end of the reflector 31 are intricately combined with each other, so that the assembly strength of the instrument body 21 can be improved. Even if the screws are screwed accordingly, the number of screw-fastened parts can be reduced to about one, and the parts and man-hours required for assembly can be reduced. Therefore, the main body 21 of the luminaire, which is a main component, can be manufactured at low cost, and the cost of the luminaire can be reduced.

Next, the procedure for embedding and mounting the equipment main body 21 in the indoor ceiling E will be described. First, the assembled instrument main body 21 is inserted into the instrument embedding opening F of the indoor ceiling E with the top plate 33 thereof facing up. Along with this insertion, the lower ends of the two hanging bolts 57 facing directly above the appliance embedding opening F in the ceiling are inserted from above into the appliance mounting holes 56 formed in both longitudinal ends of the top plate 33, respectively. Insert it. Further, the depth of embedding of the instrument main body 21 into the instrument embedding opening F is such that the continuous projecting edge portions 35 and 48 formed on the lower edge of the main body 21 are
It is regulated by contacting the lower surface of the edge of the instrument embedding opening F.

After this, a hanging bolt 57 penetrating the device mounting hole 56 downward from below the top plate 33 of the device body 21.
After the washers 58 are fitted to each other, nuts 59 are screwed into the bolts 57 to tighten them.

As a result, the instrument main body 21 is pushed up via the washer 58, so that the projecting edge portions 35 and 48 of the main body 21 are closely attached to the lower surface of the edge portion of the instrument embedding opening F without leaving a gap between the instrument main body 21 and the room. It is mounted by being embedded in the ceiling E. A state in which the instrument body 21 is properly attached by the above procedure is shown in FIG.

By the way, in such mounting, the nut 59 may be excessively tightened in order to bring the projecting edges 35 and 48 into close contact with the lower surface of the edge of the instrument embedding opening F. In this case, by tightening the nut 59 strongly,
The longitudinal end of the top plate 33 of the reflection plate 31 included in the instrument body 21 is deformed so as to be lifted around the instrument attachment hole 56.

However, a slit-shaped elongated opening 60 is provided in the top plate end portion 33a between the instrument mounting hole 56 and the end plate 32, and the strength of the top plate end portion 33a is changed. Is lower than the part. Thereby, when the nut 59 is strongly tightened, the deformation of the top plate 33 due to the tightening is concentrated on a part of the part between the opening 60 and the instrument mounting hole 56, and the same part is moved upward. It can be easily deformed so as to be convex, and the influence that this deformation has on the side of the end plate 32 can be cut off by the opening 60. The state in which the tool body 21 is attached by excessively tightening the nut 59 is shown in FIG. 11.

Therefore, the influence of the deformation of the top plate end portion 33a due to the tightening of the nut 59 is affected by this portion and the end plate 3.
The end plate 32 is not excessively subjected to an upward force due to the tightening of the nut 59, so that the overhanging edge portion 48 of the end plate 32 is not affected. The central portion in the width direction can be used as the maximum displacement portion to suppress the upward warp.

Moreover, as described above, the top plate end portion 33
Since the portion between the opening 60 of a and the device mounting hole 56 can be easily deformed to absorb most of the tightening force, the side plates 34 positioned on both sides in the width direction of the top plate 33 passing through the device mounting hole 56. It is possible to extremely reduce the influence of the deformation of the top plate 33 due to the tightening even on the portion of. Thereby, at the longitudinal end of the side plate 34,
It is also possible to suppress deformation of the overhanging edge portion 35 warping upward.

As described above, it is possible to suppress the warp deformation of the overhanging edges 35 and 48 at the longitudinal ends of the instrument body 21 due to the tightening of the nut 59. The appearance with the body 21 attached can be improved.

Accordingly, in particular, when a plurality of luminaires are mounted in a line-like arrangement in a row as shown in combination with a two-dot chain line in FIG. Since the warp deformations of the first and the second devices 48 are suppressed, a prominent step is not formed between the projecting edge portions 48 between the adjacent instrument main bodies 21. Therefore, the appearance in that case can be improved.

Moreover, as described above, since the deformation can be prevented from spreading to the end plate 32 and the like, the work can be performed without worrying about over-tightening of the nut 59, so that the workability of mounting the instrument on the ceiling is improved. In addition, the overhanging edges 35 and 48 can be surely brought into close contact with the lower surface of the indoor ceiling E without any gap as the nut 59 is strongly tightened.

FIG. 12 shows a second embodiment of the present invention. The second embodiment is different from the first embodiment only in the structure of the deformation breaking means, and the other structures are shown in FIGS. 1 to 11 including a part not shown in FIG. It has the same or similar configuration as the ceiling-embedded luminaire of the first embodiment. Therefore, for the configuration not shown, FIGS. 1 to 11 are used as substitutes, and the same or similar components shown in the figure are denoted by the same reference numerals as those in the first embodiment, and the description of those configurations and The description of the action and effect based on it will be omitted, but the same or similar parts will also be described in the second section.
Is a part of the configuration of the ceiling-embedded luminaire according to the embodiment.

The deformation blocking means according to the second embodiment is composed of a plurality of parallel elongated slit-shaped openings 6.
It is formed by 0. These openings 60 are the end plates 32.
Is provided in the central portion in the width direction of the top plate end side portion 33a between the tool mounting hole 56 and the instrument mounting hole 56 so as to extend in the longitudinal direction of the top plate 33, and the width of the openings 60 is preferably between adjacent openings 60. An elongated bridge portion 33a1 narrower than that is provided. Therefore, the strength of the portion where each opening 60 is provided is lower than that of the surrounding portion, and each bridge portion 33a1 can be easily deformed.

Further, in the second embodiment,
Each of the openings 60 is provided so as to be hidden from below by the V-shaped reflector 23 (see FIG. 6 and the like). Thereby, light leakage to the outside of the instrument main body 21 through the opening 60 is eliminated. However, the present invention is not limited to this, and some openings 60 from both ends in the width direction of the top plate 33 are provided at positions that are not covered with the V-shaped reflection plate 23 and the reflection plate 23, and the openings 60 are provided. The heat radiation from the lamp 26 may be improved by facing the filament part (see FIG. 1) around the high temperature. The configuration other than the above is the same as that of the first embodiment.

Also in the second embodiment having such a configuration, when the instrument main body 21 is mounted via the nut 59 which is screwed and tightened by the hanging bolt 57 on the ceiling, the nut 59 is temporarily tightened. Even if the raising is too strong, the deformation of the top plate end portion side portion 33a accompanying it can be concentrated on the bridge portion 33a1 between the openings 60, and this deformation can be suppressed from spreading to the end plate 32 side and the side plate 34 side. . Thereby, the first problem of the present invention can be solved.

The present invention is not limited to the above embodiments.

For example, the deformation blocking means provided on the top plate end side portion 33a is formed by providing a large number of small openings, that is, a large number of small holes over the entire area where the opening 60 is provided in FIG. Good.

In addition, the present invention is a ceiling-embedded luminaire for one lamp in which the V-shaped reflector 23 is omitted and one straight tube type fluorescent lamp 26 is provided in the luminaire body 21, or a V-shaped luminaire. The present invention can be applied to a ceiling-embedded luminaire in which a plurality of reflectors 23 are provided and three or more fluorescent lamps 26 are mounted, and the lamp as a light source is a straight tube type fluorescent lamp or a ring-shaped lamp or the like. You can use any lamp.

In the present invention, the end plate 32 of the instrument body 21 may be made of metal plate instead of synthetic resin. Further, the side plate 34 of the reflection plate 31 of the instrument body 21 is
It may be bent at a right angle to the top plate 33.

[0072]

The present invention is embodied in the form described above and has the following effects.

According to the first aspect of the present invention, even when the nut screwed to the suspension bolt is excessively tightened when the instrument body is attached, the instrument mounting hole and the instrument body in the top plate of the reflector provided in the instrument body The deformation blocking means provided on the top plate end side portion between the end plate and the end plate concentrates the deformation on a part of the top plate end side portion, and the influence of the excessive tightening may affect the surroundings of the end plate and the like. It is possible to reduce the spread to. Therefore,
It is possible to prevent the end of the instrument body from being warped when the instrument body is attached to the ceiling, and to improve the appearance of the instrument body when attached to the ceiling. Moreover, when a plurality of lighting fixtures are mounted in a line-like arrangement that is continuous in a row, a step is less likely to occur between the overhanging edge portions of the end plates of the adjacent fixture bodies. The device can be mounted in the lined arrangement.

According to the second aspect of the present invention, the structure for solving the first problem is simple, and the structure ensures that the influence of the excessive tightening will spread to the end plates. Can be shut off.

[Brief description of drawings]

FIG. 1 is a perspective view showing the overall configuration of a ceiling-embedded luminaire according to a first embodiment of the present invention.

FIG. 2 is a diagram showing the configuration of a ceiling-embedded luminaire according to the first embodiment as viewed from the direction of arrow Z in FIG.

FIG. 3 is a side view showing a partial cross-section of the configuration of one end of the ceiling-embedded lighting fixture according to the first embodiment.

FIG. 4 is a plan view showing the configuration of one end shown in FIG.

FIG. 5 is an exploded perspective view showing the configuration of the one end portion shown in FIG.

FIG. 6 is a cross-sectional view showing the configuration of a ceiling-embedded lighting fixture according to the first embodiment.

7 is an enlarged perspective view showing a Y portion in FIG.

FIG. 8 is a perspective view showing the configuration of third fixing means of the ceiling-embedded lighting fixture according to the first embodiment.

9 is a cross-sectional view showing the structure of a first fixing means taken along line XX in FIG.

FIG. 10 is a cross-sectional view showing a fixture mounting structure for mounting the ceiling-embedded lighting fixture according to the first embodiment on an indoor ceiling.

FIG. 11 is a cross-sectional view showing a fixture mounting structure when the nut is excessively tightened when the ceiling-embedded lighting fixture according to the first embodiment is attached to the indoor ceiling.

FIG. 12 is an exploded perspective view showing a configuration of one end of a ceiling-embedded lighting fixture according to a second embodiment of the present invention.

FIG. 13 is a perspective view showing the overall configuration of a ceiling-embedded luminaire according to a conventional example.

FIG. 14 is a plan view showing the configuration of one end of a ceiling-embedded luminaire according to a conventional example.

FIG. 15 is an exploded perspective view of the configuration of the one end portion shown in FIG.

FIG. 16 is a diagram schematically showing a configuration of a ceiling-embedded luminaire according to a conventional example with a part thereof cut away as seen from the direction of arrow W in FIG.

FIG. 17 is a cross-sectional view showing a fixture mounting structure for mounting a ceiling-embedded lighting fixture according to a conventional example on an indoor ceiling.

FIG. 18 is a cross-sectional view showing a fixture mounting structure when a nut is excessively tightened when a ceiling-embedded lighting fixture according to a conventional example is attached to an indoor ceiling.

[Explanation of symbols]

 21 ... Instrument main body, 31 ... Reflecting plate, 32 ... End plate, 33 ... Top plate, 33a ... Top plate end side part, 34 ... Side plate, 35 ... Reflecting plate overhanging edge part, 48 ... Ending plate overhanging edge part , 56 ... Instrument mounting hole, 57 ... Hanging bolt, 58 ... Washer, 59 ... Nut, 60 ... Opening (deformation blocking means), E ... Indoor ceiling, F ... Instrument embedding opening.

Claims (2)

[Claims] 1. A horizontal top plate having reflecting plates each having side plates bent downward from both side edges, and end plates respectively connected to both ends in the longitudinal direction of the reflecting plate, and the side plates and An instrument main body having a bottom opening provided with continuous projecting edges at the lower edge of the end plate, the instrument main body being passed through the instrument embedding opening formed in the ceiling, and at the bottom surface of the edge of the embedding opening. A suspension bolt which is brought into contact with the projecting edge portion and is passed from above through instrument mounting holes respectively opened at the widthwise center positions of the top plate in the longitudinal direction both ends,
In a ceiling-embedded lighting fixture that is attached to this bolt via a nut screwed from below the top plate, in a top plate end side portion between the end plate and the fixture mounting hole, A ceiling-embedded luminaire, characterized in that a deformation blocking means consisting of at least one opening is provided at least at the center in the width direction. 2. The deformation blocking means is formed of a slit-like single elongated opening provided in the top plate end portion side portion so as to extend in the width direction thereof. The ceiling-mounted luminaire described.