JP2016046152A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device which enables lamp fitting bodies having different dimensions to be attached thereto without exchanging an attachment body provided on a ceiling.SOLUTION: In a lighting device 1 for a ceiling, an attachment body 10 is provided on a ceiling and a lamp fitting body 20 is attached to the attachment body 10 with a lamp fitting fixing bracket 40. A lighting device box 30 which houses a lighting device is provided on a top surface 23 of the lamp fitting body 20. The lamp fitting fixing bracket 40 and the lighting device box 30 may move on the top surface 23 of the lamp fitting body 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lighting fixture used by being attached to a ceiling.

  Conventionally, there has been a luminaire in which a lamp body provided with a light source and a lighting device box containing a lighting device for lighting the light source are fixed to a long rectangular case viewed from the bottom that is bolted to the ceiling with a specified bolt pitch. It is known (see, for example, Patent Document 1).

Japanese Patent No. 5320600

In the conventional lighting fixture, the case and the lamp body have a configuration in which the sizes are matched to each other. For this reason, for example, in order to attach a larger lamp body in order to increase the output of the light source, it is necessary to replace the case with a larger one. However, in such a luminaire, there has been a demand for attaching a lamp body of a different size without replacing the case.
This invention is made | formed in view of the situation mentioned above, and it aims at providing the lighting fixture which can attach the lamp main body of a dimension difference, without replacing | exchanging the case provided in a ceiling.

  In order to achieve the above-described object, a lighting device according to the present invention includes a lighting device in which a lighting device is housed in a lighting device for a ceiling in which a mounting body is provided on a ceiling, and the lighting device body is mounted on the mounting body with a lighting fixture. A box is provided on the top surface of the lamp body, and the lamp mounting bracket and the lighting device box are movable on the top surface of the lamp body.

  Further, the present invention is characterized in that, in the above-mentioned lighting fixture, the lamp mounting bracket and the lighting device box are movable independently from each other on the top surface of the lamp body.

  Moreover, the present invention is characterized in that, in the above-described lighting fixture, at least two lamp main bodies can be mounted side by side in the longitudinal direction on the mounting main body.

  Further, the present invention provides the above-mentioned lighting fixture, wherein a screw is formed on the top surface of the lamp body so as to form a groove from one end to the other end in the longitudinal direction and fix the lamp mounting bracket and the lighting device box. The head is loosely fitted in the groove, and the shaft of the screw is slid on the top surface of the lamp body to be movable.

  According to the present invention, in a lighting fixture for a ceiling in which a mounting body is provided on the ceiling, and the lamp body is mounted on the mounting body with a lamp mounting bracket, a lighting device box that houses the lighting device is provided on the top surface of the lamp body. Since the lamp mounting bracket and the lighting device box are movable on the top surface of the lamp body, the lamp mounting bracket and the lighting device box are moved to appropriate positions according to the mounting body. It is possible to attach a lamp body having a different size to the mounting body without replacing the mounting body.

It is a disassembled perspective view of the lighting fixture of embodiment of this invention. It is sectional drawing of a lighting fixture. It is a fragmentary perspective view which shows the structure of the top | upper surface of a lighting fixture. It is a disassembled perspective view of a lighting fixture provided with the lamp main body of a dimension difference. It is a disassembled perspective view of a lighting fixture provided with two lamp main bodies. It is a figure which shows the structure of a lighting fixture, (A) shows the structure directly attached to the ceiling, (B) shows the structure of a ceiling suspended form, (C) shows the structure provided with three lamp main bodies, (D) shows the structure which combined the high output instrument and the low output instrument.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an exploded perspective view showing a lighting fixture 1 according to the embodiment, FIG. 2 is a cross-sectional view of the lighting fixture 1, and FIG. 3 is a partial perspective view showing the configuration of the top surface 23 of the lamp body 20. In addition, the upper and lower sides of the instrument in this embodiment define the direction in which the light from the light source is emitted as the lower side.
The lighting fixture 1 is ceiling lighting used by being attached to a ceiling. The luminaire 1 includes a mounting body 10 (case), a lamp body 20, and a lighting device box 30.

  The mounting body 10 is formed in a box shape having a long rectangular shape when viewed from the bottom, and the entire lower surface is open. A mounting bolt 12 for fixing the mounting body 10 to the ceiling is fixed to the upper surface 11 of the mounting body 10. The mounting bolts 12 are provided at predetermined positions (for example, 600 mm or 800 mm) at symmetrical positions with respect to the longitudinal center of the mounting body 10. The lighting fixture 1 is used by suspending the mounting body 10 from the ceiling using a hanging bolt as the mounting bolt 12. In addition, the upper surface 11 of the mounting body 10 is provided with a drawing hole 13 for drawing the electric wire 4 inside the mounting body 10. The lead-in hole 13 is provided at the approximate center in the longitudinal direction of the mounting body 10.

  The lamp body 20 includes a light source on the bottom surface 21. An illumination cover 22 that diffuses light emitted from the light source is attached to the bottom surface 21. The illumination cover 22 is a milky white cover, for example, and is formed of a resin material or glass. The illumination cover 22 is screwed to the bottom surface 21 of the lamp body 20 by a mounting bracket 27 (see FIG. 2). The mounting bracket 27 is provided at least at both ends in the longitudinal direction of the lighting cover 22. Moreover, the structure which seals the bottom face 21 of the lamp main body 20 liquid-tightly may be sufficient as the illumination cover 22. FIG. That is, in the lighting fixture 1, although the illustration of the lighting cover 22 is omitted so that the waterproofness of the lamp body 20 is maintained by the lighting cover 22, a waterproof packing is interposed between the bottom surface 21 of the lamp body 20. It may be allowed to attach to the lamp body 20.

  The lighting device box 30 is provided on the top surface 23 of the lamp body 20. The lighting device box 30 houses a lighting device that turns on the light source included in the lamp body 20. The lighting device accommodated in the lighting device box 30 includes a control board such as a power supply board when the light source provided in the lamp body 20 is a light emitting element such as an LED or an organic EL. When the light source included in the lamp body 20 is a fluorescent lamp, the lighting device box 30 accommodates a ballast that controls the current and supplies the starting voltage and the preheating voltage as the lighting device. The lighting device box 30 is connected to the electric wire 4 drawn from the drawing hole 13 of the mounting body 10.

  The lighting device box 30 is screwed to the top surface 23 of the lamp body 20. The lighting device box 30 has a bottom surface 31 extending from both end surfaces 32 in the longitudinal direction, and a mounting body 33 is formed by the extended extending portion. Each mounting body 33 is provided with at least one mounting hole 35 for receiving a shaft 24B in which a thread 24 of a screw 24 extending substantially perpendicularly from the top surface 23 of the lamp body 20 is cut. The lighting device box 30 is fixed on the top surface 23 of the lamp body 20 by tightening a fixing nut 34 on the shaft 24B of the screw 24 inserted through the mounting hole 35.

A shaft 24B of at least two screws 24 for fixing the lighting device box 30 protrudes from the top surface 23 of the lamp body 20, and a lamp mounting bracket 40 for fixing the lamp body 20 to the mounting body 10 is fixed 4 The shaft 24B of the two screws 24 protrudes. The lamp mounting bracket 40 includes a contact surface 42 that contacts the top surface 23 of the lamp body 20, a standing surface 43 that stands on the contact surface 42 and faces both side surfaces 15 of the mounting body 10, and a contact surface 42. And a continuous surface 44 connected to the compatible surface 43. The standing surface 43 may be configured to be inscribed in the both side surfaces 15 of the mounting body 10 when the lamp body 20 is fixed to the mounting body 10, or may be configured to face the both side surfaces 15 with a slight gap. It may be.
The contact surface 42 is provided with two receiving holes 45 for receiving the shaft 24 </ b> B of the screw 24 protruding from the top surface 23 of the lamp body 20 at a predetermined distance in the short direction of the lamp body 20. The lamp mounting bracket 40 is fixed on the top surface 23 of the lamp body 20 by tightening a bracket fixing nut 41 on the shaft 24B of the screw 24 inserted through the receiving hole 45.

  The lamp body 20 includes a screw hole 46 provided in the compatible mounting surface 43 of the lamp fixture 40 fixed to the top surface 23, and screw holes 17 (see FIG. 5) provided on both side surfaces 15 of the mounting body 10. The screw 14 is fastened together and fastened together to be fixed to the mounting body 10. Further, the lamp body 20 is fastened with screws 14 into screw holes 47 provided on the continuous surface 44 of the lamp mounting bracket 40 and screw holes 18 provided on both end faces 16 in the longitudinal direction of the mounting body 10. You may fix to the attachment main body 10 by fastening together. Thus, the lamp body 20 is attached to the mounting body 10 with the lighting device box 30 and the lamp mounting bracket 40 fixed to the top surface 23.

  As shown in FIGS. 2 and 3, the top surface 23 of the lamp body 20 is provided with a groove 25 in which a head 24 </ b> A of a screw 24 for fixing the lighting device box 30 and the lamp mounting bracket 40 is loosely fitted. Yes. The groove 25 is a reverse T-shaped groove when viewed in cross section. Further, two grooves 25 are provided at a predetermined distance in the short direction of the lamp body 20. The groove 25 is formed from one end 29A in the longitudinal direction of the lamp body 20 to the other end 29B. The lamp body 20 is formed of a plate material made of a metal material having high thermal conductivity such as an aluminum alloy, and the grooves 25 are integrally formed by extrusion molding. In addition, the top surface 23 of the lamp body 20 is provided with a wiring groove 26 between the grooves 25, 25 for wiring the electric wire 4 drawn inside the mounting body 10. Similarly to the groove 25, the wiring groove 26 is also formed integrally with the lamp body 20 by extrusion molding.

  FIG. 2 shows a configuration in which the lighting fixture 1 includes an LED, which is an example of a light emitting element, as a light source. The lighting fixture 1 includes an LED module 50 and a module substrate 51. The LED module 50 is a so-called COB type LED, in which a large number of LEDs are densely arranged on an LED substrate, and includes a planar light emitting unit having a rectangular shape (may be circular) in plan view. In addition to the configuration using the COB type LED, an LED module in which a plurality of LEDs with a lens are arranged on a substrate, and a single unit and a plurality of LED modules in which a large number of SMD type LEDs are arranged in the central portion of the LED substrate are connected to each other. It may be used as The module substrate 51 is a long rectangular plate-like substrate on which the plurality of LED modules 50 are mounted. The module substrate 51 is formed of a material having electrical insulation and high thermal conductivity, such as a ceramic material. A plurality of LED modules 50 are mounted on the surface of the module substrate 51, and the back surface is fixed to the bottom surface 21 of the lamp body 20. The module substrate 51 may be configured such that the back surface is bonded to the bottom surface 21 of the lamp body 20 and fixed to the lamp body 20. Further, the module substrate 51 may be configured to be sandwiched between the bottom surface 21 of the lamp body 20 and the illumination cover 22 and fixed to the lamp body 20. According to these configurations, the module substrate 51 can obtain an electric withstand voltage between the LED module 50 and the lamp body 20, and the heat of the LED module 50 is transferred from the back surface of the module substrate 51 to the lamp body 20. To dissipate heat.

  Moreover, since the groove | channel 25 and the wiring groove | channel 26 were formed in the top | upper surface 23 of the lamp body 20, these grooves 25 and the wiring groove | channel 26 played the role of the radiation fin, and heat | fever of the LED module 50 was more efficiently carried out by the lamp body 20. Heat can be dissipated. Further, by providing the groove 25 and the wiring groove 26 on the top surface 23 of the lamp body 20, the contact area between the bottom surface 31 of the lighting device box 30 and the top surface 23 can be reduced, and the heat of the LED module 50 can be reduced. Excessive heat transfer to the lighting device box 30 can be prevented.

  As shown in FIG. 3, the head 24 </ b> A of the screw 24 is fitted into the grooves 25, 25 from one end 29 </ b> A or the other end 29 </ b> B of the lamp body 20. The head 24A of the screw 24 is fitted in the groove 25, 25 with play. That is, the screw 24 is configured to be slidable and movable along the grooves 25 and 25 with the head 24A of the screw 24 fitted in the grooves 25 and 25, and the shaft 24B on which the thread of the screw 24 is cut is provided. The groove 25 can be moved to an arbitrary position. Each groove 25 is provided with at least three screws 24, and these screws 24 are configured to be slidable and movable along the grooves 25 independently. As the screw 24, a square root round head screw can be suitably used. By using a rounded round head screw as the screw 24, a square portion provided on the neck of the screw 24 is disposed between the locking portions 28 of the groove 25, and the rotation of the screw 24 is restricted. Thereby, when the metal fitting fixing nut 41 or the fixing nut 34 is fastened to the screw 24, it is possible to prevent the screw 24 from rotating.

The wiring groove 26 includes a side groove 26A into which the electric wire 4 is fitted at the bottom of the groove. The wiring groove 26 is provided with a wire stopper 26B that stops the electric wire 4 fitted in the side groove 26A from being detached from the side groove 26A. The wire stopper 26B is formed by projecting the vicinity of the inlet of the side groove 26A from the vertical direction to the inside of the wiring groove 26.
By moving the screw 24 along the groove 25, the lamp mounting bracket 40 and the lighting device box 30 can be fixed at arbitrary positions on the top surface 23 of the lamp body 20. In order to make the lighting device box 30 movable on the top surface 23 of the lamp body 20, the electric wire 4 is drawn inside the mounting body 10 with a margin in length. The excess electric wires 4 inside the mounting body 10 can be fitted into the side grooves 26A of the wiring grooves 26 and placed.

  When the fixing nut 34 or the metal fitting fixing nut 41 is screwed into the screw 24, the locking portion 28 of the groove 25 (see FIG. 2) between the head 24A of the screw 24 and the fixing nut 34 or the metal fixing nut 41. And the screw 25 is fixed to the groove 25. Note that the head 24 </ b> A of the screw 24 is separated from the locking portion 28 of the groove 25 by turning the fixing nut 34 or the metal fixing nut 41 in the direction of loosening the thread of the screw 24. Accordingly, the screw 24 can be moved along the groove 25 in a loosened state without completely removing the fixing nut 34 or the metal fitting fixing nut 41 from the screw 24. Therefore, by appropriately loosening the fixing nut 34 or the metal fixing nut 41, the lamp mounting bracket 40 and the lighting device box 30 can be moved to appropriate positions independently of each other on the top surface 23 of the lamp main body 20. it can.

  At least two screws 24 that movably fix the lighting device box 30 on the top surface 23 of the lamp body 20 are fitted into one of the two grooves 25 provided side by side in the lateral direction of the lamp body 20. (See FIG. 1). The lighting device box 30 has an attachment body 33A on one end side fixed to the top surface 23 of the lamp body 20 with a screw 24 fitted in one groove 25A, and an attachment body 33B on the other end side attached to the other groove 25B. It is fixed on the top surface 23 of the lamp body 20 with a screw 24 fitted in. In this way, the lighting device box 30 is fixed on the top surface 23 by fixing the attachment body 33A on one end side and the attachment body 33B on the other end side on the top surface 23 of the lamp body 20 one by one. Thus, the number of screws 24 that are loosened when moved by can be reduced, and work efficiency can be improved. In addition, since the attachment body 33A on one end side is fixed with the screw 24 fitted in the one groove 25A and the attachment body 33B on the other end side is fixed with the screw 24 fitted in the other groove 25B, two screws are provided. The lighting device box 30 can be stably fixed even with the screw 24.

Next, the attachment procedure of the lighting fixture 1 is demonstrated.
First, the mounting body 10 is fixed to the ceiling with mounting bolts 12 in advance. Next, the lamp mounting bracket 40 and the lighting device box 30 are movably mounted on the top surface 23 of the lamp body 20 on which the LED module 50, the module substrate 51, and the illumination cover 22 are mounted on the bottom surface 21, respectively. Subsequently, the lamp mounting bracket 40 and the lighting device box 30 are moved to the appropriate positions on the top surface 23 in correspondence with the mounting body 10 and fixed. And while connecting the electric wire 4 drawn in from the drawing hole 13 of the attachment main body 10 to the lighting device box 30, the excess electric wire 4 is fitted in the wiring groove 26 and wired. Finally, the lamp mounting bracket 40 is fixed to the mounting body 10 with screws 14 (screws 17 if necessary).

Thus, the lighting fixture 1 can move the lamp mounting bracket 40 and the lighting device box 30 independently of each other on the top surface 23 of the lamp body 20. Accordingly, for example, as in the lighting fixture 1A illustrated in FIG. 4, it is possible to fix the lamp body 20 whose longitudinal dimension is longer than that of the mounting body 10 to the mounting body 10. In the lighting fixture 1 </ b> A shown in FIG. 4, one lamp mounting bracket 40 is fixed in the vicinity of one end 29 </ b> A of the lamp body 20, and the other lamp mounting bracket 40 is fixed at a position that matches the dimensions of the mounting body 10. Then, the lamp body 20 is fixed to the mounting body 10 with screws 14 from both ends in the longitudinal direction of the mounting body 10. At this time, the arrangement position of the lighting device box 30 may be adjusted according to the position of the mounting bolt 12 of the mounting body 10 or the position of the center of gravity of the lamp body 20 according to the position of the pull-in hole 13. May be. Although not shown, the top surface 23 of the lamp body 23 may be appropriately provided with a scale for screw alignment along the groove 25.
In this way, by moving the lamp mounting bracket 40 and the lighting device box 30 to appropriate positions, the lamp body 20 can be attached to the mounting body 10 even when the dimensions of the lamp body 20 and the mounting body 10 do not match. Can be fixed. Therefore, for example, in order to increase the output of the light source, even if it is desired to attach a larger lamp body 20, there is no need to replace the mounting body 10, and the lamp body 20 of a desired size is attached to the existing mounting body 10. Easy to install.

  By the way, the lamp body 20 can be increased in output by increasing the length in the longitudinal direction and mounting more LED modules 50. However, when the length of the lamp body 20 is increased, there is a problem that the handleability is deteriorated accordingly. For this reason, there is a desire to increase the output of the lighting fixture 1 without increasing the length of the lamp body 20. In order to meet this demand, it is possible to adopt a configuration in which two lamp bodies 20 are attached to one attachment body 10 as in the lighting fixture 1B shown in FIG.

  In the lighting fixture 1 </ b> B shown in FIG. 5, two lamp body 20 are mounted side by side in the length direction on one mounting body 10. Each lamp body 20 may be a lamp body formed according to the dimensions of the mounting body 10, or may be a lamp body having a dimension different from that of the mounting body 10. Moreover, even if each lamp body 20 has the same dimensions, it may have different dimensions.

  Each lamp main body 20 is disposed so that the end surfaces of the lamp main bodies 20 face each other so that the connection portion 36 to which the electric wire 4 drawn from the drawing hole 13 of the attachment main body 10 is connected to the lighting device box 30 faces the center of the appliance. The connecting portion 36 may be a hole into which the electric wire 4 connected to the lighting device housed in the lighting device box 30 is drawn, or a socket for connecting the electric wire 4 to the electric wire extending from the lighting device. There may be. When the lighting device box 30 is fixed on the top surface 23 so that the connecting portion 36 faces the other end 29B side of the lamp body 20, the lamp body 20 has the other end 29B as shown in FIG. They are attached to the attachment main body 10 by abutting each other.

  Next, the attachment structure in the case of attaching the two lamp main bodies 20 to the attachment main body 10 by abutting the other ends 29B of each other will be described. Each lamp body 20 includes a pair of lamp fittings 40 provided with the lighting device box 30 interposed therebetween. The lamp body 20 is arranged at the substantially center in the longitudinal direction of the mounting body 10 so that the other ends 29 </ b> B are abutted with each other. One lamp mounting bracket 40 disposed on the one end 29 </ b> A side of the lamp body 20 is fixed on the top surface 23 at a position inscribed in the end surface 16 of the mounting body 10. The other lamp mounting bracket 40 disposed on the other end 29 </ b> B side of the lamp body 20 is fixed to the top surface 23 in the vicinity of the other end 29 </ b> B of the lamp body 20. One lamp fixture 40 is fixed to the mounting body 10 by screws 14 screwed into the screw holes 47 provided in the connecting surface 44 from both end faces 16 of the mounting body 10. The other lamp mounting bracket 40 is fixed to the mounting body 10 from both side surfaces 15 of the mounting body 10 by screws 17 screwed into screw holes 46 provided in the standing surface 43.

  As described above, since at least two lamp bodies 20 can be attached to one mounting body 10, the lighting fixture 1 </ b> B can be used without configuring each lamp body 20 as one lamp body that is long in the longitudinal direction. Output can be increased. Therefore, the handleability of the lamp body 20 can be improved.

  As described above, according to the embodiment to which the present invention is applied, the lighting device 1 for a ceiling in which the mounting body 10 is provided on the ceiling and the lamp body 20 is mounted on the mounting body 10 with the lamp mounting bracket 40. Is provided on the top surface 23 of the lamp body 20, and the lamp mounting bracket 40 and the lighting device box 30 are movable on the top surface 23 of the lamp body 20. According to this configuration, the lamp mounting bracket 40 and the lighting device box 30 can be moved to appropriate positions on the top surface 23 of the lamp body 20 according to the mounting body 10. Therefore, the lamp body 20 having a dimension different from that of the mounting body 10 can be mounted on the mounting body 10 without replacing the mounting body 10 fixed to the ceiling in advance. Therefore, the lamp body 20 can be easily replaced with a larger one in order to increase the output, for example.

  Further, according to the embodiment to which the present invention is applied, the lamp mounting bracket 40 and the lighting device box 30 can be moved independently from each other on the top surface 23 of the lamp body 20. According to this configuration, according to the configuration of the mounting body 10, the lamp mounting bracket 40 and the lighting device box 30 can be independently moved to appropriate positions. Therefore, considering the positional relationship between the lighting device box 30 and the lead-in hole 13 of the mounting body 10, the position of the center of gravity of the lighting body 20, the positional relationship of the mounting bolts 12 of the mounting body 10, etc. The metal fitting 40 and the lighting device box 30 can be arranged respectively.

  In addition, according to the embodiment to which the present invention is applied, at least two lamp bodies 20 can be mounted on the mounting body 10 in the longitudinal direction. According to this configuration, it is possible to increase the output of the lighting fixture 1 by attaching the plurality of lamp bodies 20 to the mounting body 10 without increasing the length of the lamp body 20. Therefore, when the length of the lamp body 20 is increased, the handleability of the lamp body 20 is deteriorated at the time of construction. In this embodiment, the output of the lighting apparatus 1 is increased without deteriorating the handleability of the lamp body 20. Can be easily achieved.

  Further, according to the embodiment to which the present invention is applied, the groove 25 is formed in the top surface 23 of the lamp body 20 from one end 29A to the other end 29B in the longitudinal direction, so that the lamp mounting bracket 40 and the lighting device box 30 are formed. The head 24A of the screw 24 for fixing the screw 24 is loosely fitted in the groove 25, and the shaft 24B on which the screw 24 is threaded is slid on the top surface 23 of the lamp body 20 to be movable. To do. According to this configuration, the lamp mounting bracket 40, the lighting device box 30, and the top surface 23 of the lamp body 20 can be moved steplessly with a simple configuration. Further, by loosening the screws, the lamp fixture 40 and the lighting device box 30 can be easily moved to appropriate positions, and the assembly workability can be improved during construction.

  The above-described embodiment is merely an example of one aspect of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention. For example, in the present embodiment, a groove 25 is provided on the top surface 23 of the lamp body 20 and the screw 24 is moved along the groove 25, so that the lamp mounting bracket 40 and the lighting device box 30 are steplessly moved. It was possible to move independently of each other. Not limited to this, a plurality of fixing portions are provided on the top surface 23 of the lamp main body 20 along the longitudinal direction, and the lamp mounting bracket 40 and the lighting device box 30 are fixed to the fixing portions to arbitrary fixing portions. It may be configured to be movable in stages. The fixing portion may be a hole or a groove formed in the top surface 23, or a bracket or the like attached to the top surface 23.

Moreover, in embodiment mentioned above, although shown about the structure which attaches the attachment main body 10 directly to the ceiling 70 as shown in FIG. 6 (A) with the attachment bolt 12, it is not restricted to this, For example, it is to FIG. 6 (B). As shown, a ceiling-suspended configuration in which the mounting body 10 is suspended from the ceiling 70 using the pipe suspension 60 may be used.
Moreover, in embodiment mentioned above, although the 2 lamp main body 20 was shown about the structure attached to the attachment main body 10, not only this but three lamp main bodies 20 as shown in FIG.6 (C), for example, It is good also as a structure attached to the attachment main body 10. FIG.
Moreover, the lamp body 20 is configured by combining a high-powered instrument with a longer length or a low-powered instrument with a short length (see FIG. 6D) in addition to a standard-length rated output instrument. You may do it. In this case, the length of the mounting body 10 may be configured to a required length according to the length of the lamp body 20 to be provided or the length and arrangement of the lighting device box 30.

DESCRIPTION OF SYMBOLS 1, 1A, 1B Lighting fixture 10 Mounting main body 20 Lamp main body 23 Top surface 24A Head 24B Axis 25 Groove 29A One end 29B Other end 30 Lighting device box 40 Lamp mounting bracket

Claims (4)

In the lighting fixture for the ceiling, in which the mounting body is provided on the ceiling, and the lamp body is mounted on the mounting body with the lamp mounting bracket.
A lighting device box containing the lighting device is provided on the top surface of the lamp body,
The lighting fixture, wherein the lamp mounting bracket and the lighting device box are movable on a top surface of the lamp body.   The lighting fixture according to claim 1, wherein the lamp mounting bracket and the lighting device box are movable independently of each other on the top surface of the lamp body.   The lighting fixture according to claim 1, wherein at least two lamp bodies can be attached to the mounting body side by side in the longitudinal direction.   A groove is formed on the top surface of the lamp main body from one end to the other end in the longitudinal direction, and a screw head for fixing the lamp mounting bracket and the lighting device box is loosely fitted in the groove. 4. The lighting apparatus according to claim 1, wherein the lighting apparatus is slidable on the top surface of the main body.

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