KR101855361B1 - Lighting apparatus for GMP - Google Patents

Abstract

The present invention improves airtightness, waterproofness, and moisture-proofing performance while supplying the installation site in a state where the luminaire body including the housing, the cover plate, and the cover are integrally assembled, and at the same time, the installation work can be performed quickly and easily, The support frame having a larger area than the installation hole of the panel is attached to the outer surface of the housing so that the support plate of the support frame is fitted to the upper surface of the ceiling panel to firmly support the lighting fixture body embedded in the installation hole of the ceiling panel, And the vertical plate engages with the outer surface of the housing, thereby increasing the contact area between the support frame and the housing, so that the housing and the support The present invention relates to a GMP lamp having a rigid frame coupling.

Description

{Lighting apparatus for GMP}

The present invention relates to a lighting apparatus for GMP, and more particularly, to a lighting apparatus for GMP which is provided with a housing, a cover, and a cover plate integrally assembled so as to improve airtightness, moisture-proof and waterproofness, To a lighting apparatus for GMP which can save time.

The clean room is a clean room that can be used in various industries such as the ultra-precision processing industries such as semiconductors, optical instruments, microbial laboratories, aseptic operating rooms, BCR (Bio Clean Room) It is defined as a closed space requiring high cleanliness by blocking inflow of bacteria and the like.

In other words, the clean room should be thoroughly blocked to prevent all equipment installed inside it from being affected by bacteria, dust and moisture.

In particular, clean rooms are operated in accordance with the GMP (Good Manufacturing Practice) standards for medical facilities and medical facilities such as microbiological laboratories and aseptic operating rooms.

Therefore, a number of fan filter units such as a HEPA filter are installed in the ceiling of the clean room, and lighting equipment is installed in the space between the fan filter units.

In this case, it is necessary to secure the airtightness and the waterproofness of the lighting equipment so as not to affect the cleanliness in the clean room, and at the same time, quick and simple installation work is required so as not to interfere with the work in the clean room.

1 is an exemplary view for explaining an installation process of a conventional clean room lamp.

1, a conventional clean room lamp (hereinafter referred to as a conventional technology) 100 includes a light source unit 103 for providing illumination according to application of current, including an LED module, a circuit board, an electronic device, A lighting fixture body 101 having front and rear openings and provided with a light source unit 103 in an inner space thereof and a rectangular frame having a translucent plate 151 at the center thereof and installed in an opening of the lighting fixture body 101 A front frame 105 and a lid 107 coupled to the rear of the luminaire body 101.

In FIG. 1, for convenience of explanation, the light source device that emits light is an LED. However, the type of the light source device is not limited thereto, and it is a matter of course that various known light source devices can be applied.

Also, the lamp body 101 is connected to a support plate 111, which is vertically connected to a point adjacent to the rear opening, and whose outer diameter is expanded.

The conventional technology 100 is installed in the installation hole 121 of the ceiling panel 120. Specifically, the rear surface of the lighting fixture body 101 and the lid 107 are connected to the installation hole 121 of the ceiling panel 120 The front frame 105 is installed so as to be exposed toward the inside of the clean room, so that the light emitted from the LED modules of the light source unit 103 can provide illumination to the inside of the clean room.

When one operator inserts the luminaire body 101 in the direction from the upper part to the lower part toward the installation hole 111 from the upper part of the ceiling panel 120, The support plate 111 of the body 101 is caught by the upper wall of the ceiling panel 120 to support the luminaire body 101. In this state, the worker working at the upper part of the ceiling panel 120 installs the light source unit 103 inside the lamp body 101 and then bolts the lid 107 and the lamp body 101 to couple them. (111) and the ceiling panel (120) through bolts.

Another worker disposed at the lower portion of the ceiling panel 120 performs a work of bolting the front frame 105 to the opening of the luminaire body 101 exposed through the installation hole 121 of the ceiling panel 120 .

In the conventional art 100, a single operator inserts the luminaire body 101 into the installation hole 121 from the upper part of the ceiling panel 120, installs the light source unit 103 inside the luminaire body 101, A work of combining the lamp body 101 and the lid 107 and a coupling operation of the support plate 111 and the ceiling panel 120 should be performed while the other worker must perform the operation of joining the front frame 105 to the opening of the luminaire body 101, so that it is not only laborious but also troublesome because it is not easy and quick to work.

In other words, since the prior art 100 is installed in the ceiling panel 120 in a state that the respective devices 101, 103, 105, 107 are disassembled, the lighting device body 101 is mounted on the ceiling panel 120 ), There is a structural limitation that the work time is delayed if the work is complicated because the assembling work of each equipment must be performed indispensably.

In addition, since the conventional technique (100) is performed in the field of assembling each equipment, the airtightness, water resistance and moisture resistance are not satisfied with the standard of GMP. Such deterioration of airtightness, waterproofness and moisture- There is a problem that can cause a fatal defect in the semiconductor device.

Korean Patent No. 10-1394131 discloses an LED lamp for a clean room in which the height of a lower frame is variable through a height adjusting screw in a height adjustable LED lamp for a clean room, There is a disadvantage that it is impossible to solve the problems of the prior art described above because the coupling operation of the upper cover and the upper frame, the coupling operation of the upper frame and the lower frame, and the coupling operation of the upper frame and the ceiling are separately performed.

In other words, it is urgent to study 1) installation can be done easily and quickly, 2) airtightness, waterproofness and moisture resistance can be secured, and 3) equipment check and replacement can be made easily.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a lighting fixture including a housing, a cover plate and a cover, which is assembled and assembled into an installation site to improve airtightness, waterproofness and moisture- And it is an object of the present invention to provide a lighting fixture for GMP which can be quickly and simply installed.

Another object of the present invention is to provide a ceiling panel in which a support frame having a larger area than an installation hole of a ceiling panel is attached to the outer surface of the housing, so that the support plate of the support frame is placed on the upper surface of the ceiling panel, And to provide a lighting apparatus for GMP capable of firmly supporting the lamp body.

According to another aspect of the present invention, there is provided a stapler comprising: a housing having a latching protrusion formed on an outer surface of the housing and having an outer diameter expanded by a stepped structure, the horizontal plate of the support frame being seated on the latching protrusion, And the housing and the support frame are firmly coupled with each other by increasing the contact area of the housing.

According to a first aspect of the present invention, there is provided a lighting fixture embedded in an installation hole of a ceiling panel, the lighting fixture comprising: a lamp body having an upper portion embedded in the installation hole and a lower portion exposed to the outside; A support frame which is coupled to an outer side of the luminaire body which is embedded in an upper portion of the installation hole at the time of installation and which supports the luminaire body, Wherein the lamp body includes: a housing having upper and lower portions thereof opened; A light source unit including a light source element, an electric circuit, a substrate, a power source, and a ballast, the inside of the housing; A cover provided at a center thereof and coupled to a lower opening of the housing; And a lid plate detachably coupled to an upper opening of the housing, wherein the luminaire body is supplied in a state in which the housing, the light source unit, and the cover plate are assembled, and the support frame includes a first support frame, The first support frame and the second support frame may include a center frame and guide inserting grooves vertically connected to both end portions of the center frame and having inwardly directed guide inserting grooves Wherein the guide rods are formed of rods and both end portions thereof are inserted into guide insertion grooves of vertical frames of the first support frame and guide insertion grooves of vertical frames of the second support frame, The springs are inserted into both ends of the guide rods, and when installed, the vertical frames of the first support frame Wherein the fixing plates are formed of a plate material having a larger area than the springs and are coupled to both ends of the guide rods, Wherein the guide frame is disposed in each of the guide insertion grooves of the vertical frames of the first support frame and the guide insertion grooves of the vertical frames of the second support frame, The center frame is formed with engaging protrusions protruding in a rectangular shape on one side in a direction facing each other. The housing has insertion grooves through which the engaging protrusions are inserted when assembled through both sides of the opposite sides.

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In the present invention, the housing may include a horizontal plate formed to extend along a circular arc at an outer side of the housing, the outer side of the housing being formed with a stepped structure by the latching jaws, A vertical plate vertically connected to the horizontal plate and connected to the outer side of the housing at the time of assembly; and a receiving plate vertically connected from the end of the vertical plate to be connected to the upper surface of the ceiling panel when assembled, And the housing is coupled through the bolt fastening of the horizontal plate and the latch jaw, and the access plate of the support frame is bolted to the ceiling panel.

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According to the present invention having the above-mentioned problems and solutions, the luminaire body including the housing, the cover plate, and the cover is integrally assembled and supplied to the installation site, thereby improving airtightness, waterproofness and moisture- .

According to the present invention, a support frame having a larger area than an installation hole of a ceiling panel is attached to the outer surface of the housing during installation, so that the support plate of the support frame is placed on the upper surface of the ceiling panel, So that it can be firmly supported.

According to another aspect of the present invention, there is provided a locking protrusion having a stepped structure on an outer side surface of a housing, the horizontal plate of the support frame being seated on a latching protrusion of the housing, So that the housing and the support frame are firmly coupled.

1 is an exemplary view for explaining an installation process of a conventional clean room lamp.
Fig. 2 is a perspective view showing a lighting apparatus for GMP, which is an embodiment of the present invention.
Figure 3 is a side view of Figure 2;
4 is an exploded perspective view of Fig.
Fig. 5 is a perspective view showing the cover plate of Fig. 4 coupled to the housing. Fig.
Fig. 6 is a perspective view showing the support frame of Fig. 3;
Fig. 7 is a side view of Fig. 6. Fig.
8 is an exemplary view for explaining the installation process of the present invention.
FIG. 9 is an exemplary view showing a state where the present invention is installed on a ceiling panel according to FIG. 8. FIG.
10 is a side sectional view showing a second embodiment of the present invention.
11 is a perspective view showing a luminaire body from which the cover plate of Fig. 10 is removed.
12 is a perspective view showing the support frame of Fig.
13 is a side sectional view taken along the line A-A 'in Fig.
14 is a side cross-sectional view taken along the line B-B 'in Fig.
FIG. 15 is an exemplary view for explaining an operation process of the support frame of FIG. 12;

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 2 is a perspective view showing a lighting apparatus for GMP which is an embodiment of the present invention, FIG. 3 is a side view of FIG. 2, and FIG. 4 is an exploded perspective view of FIG.

The GMP light fixture (1) of the present invention is an illumination light that is installed (buried) in a ceiling panel of a clean room to provide illumination to the inside of a clean room, and each of the devices is provided in an assembled state, And at the same time, enhances airtightness, waterproofness and moisture resistance, thereby providing a lighting apparatus that meets the conditions of a clean room.

As shown in Figs. 2 to 4, the GMP light fixture 1 comprises a lamp body 3 and a support frame 5. Fig.

In the present invention, for convenience of explanation, the mounting body 21 of the ceiling panel 20 corresponding to the end surface of the lamp body 3 and the luminaire body 3 has a rectangular sectional shape. However, It is a matter of course that various shapes such as a circular shape and a polygonal shape can be applied to the sectional shape of the mounting hole 21 of the lamp body 3 and the ceiling panel 20 corresponding thereto.

The lamp body 3 includes a housing 31 formed in a polyhedral shape in which upper and lower portions are opened, a light source 37 provided inside the housing 31, a cover 33 installed at the front opening of the housing 31, And a cover plate 35 provided at a lower portion of the housing 31. [

The housing 31 is formed in a polyhedral shape in which upper and lower portions are opened, and an engagement protrusion 311 is formed on an outer side surface of the housing 31 so that the outer diameter thereof is expanded in a stepped structure. At this time, bolt grooves 3112 are formed at intervals in the locking jaw 311, and the support frame 5 is seated and engaged when installed.

Also, the housing 31 is made of a material such as synthetic resin, stainless steel, aluminum, steel, etc., which has high durability and excellent workability.

In addition, the housing 31 is provided with a light source unit 37, a cover 33 at the front opening, and a cover plate 35 at the rear opening.

The housing 31 is formed with the same size as the inner diameter of the mounting hole 21 of the ceiling panel 20 with the outer diameter of the housing 31 being the center of the hanging jaw 311, (21).

The housing 31 has a seating groove 3131 formed along the inner end thereof at an inner end of the rear face 313 forming the rear opening so that the rim of the cover plate 35 can be seated. At this time, bolt grooves 3133 are formed on the bottom surface of the seating groove 3131 to form a thread on the inner circumferential surface.

The light source unit 37 includes light emitting diode (LED) modules, a circuit board, an electronic device, a safety device, and the like.

The light source unit 37 is installed inside the housing 31 such that the LED modules face the front opening. At this time, though not shown in the drawing, the inner side surface of the housing 31 provides a space in which the light source part 37 can be seated.

Fig. 5 is a perspective view showing the cover plate of Fig. 4 coupled to the housing. Fig.

The cover plate 35 is formed of a rectangular plate and is inserted into the seating groove 3131 of the housing 31 when assembled to seal the rear opening of the housing 31.

The cover plate 35 is also formed with bolt holes 351 at positions adjacent to the corners and the bolt holes 351 correspond to the positions of the bolt grooves 3133 of the seating groove 3131 of the housing 31. [ That is, the cover plate 35 is bolted to the seating groove 3131 of the housing 31.

5, the bolt B for fastening the cover plate 35 and the housing 31 is preferably a hand bolt that can be easily fastened and disassembled by a human hand Do.

That is, the cover plate 35 exposes the light source unit 37 to the outside at the time of disassembly. Therefore, when the equipment is inspected and replaced, the operator can easily perform the operation through assembly and disassembly of the cover plate 35 without disassembling the lamp body 3 So that it can be easily performed.

The cover 33 is formed in a rectangular frame shape having a translucent plate 331 at the center thereof and is installed at the front opening of the housing 31.

The cover 33 has a larger area than the installation hole 21 of the ceiling panel 20 so that the upper surface of the cover 33 is brought into contact with the lower surface of the ceiling panel 20 during assembly.

The upper surface of the cover 33, which is in contact with the lower surface of the ceiling panel 20, is packed with silicone or the like, thereby preventing foreign matter and moisture from leaking through the installation hole 21.

The lamp body 3 thus constructed is supplied to the installation site in a state in which the assembling areas of the respective equipments 31, 33, 35, and 5 are packed and assembled integrally at the time of assembling, The waterproof property and the moisture-proof property can be enhanced, the installation work can be performed easily and quickly, and the advantage of being able to reduce the work force is obtained.

Fig. 6 is a perspective view showing the support frame of Fig. 3, and Fig. 7 is a side view of Fig. 6. Fig.

6 and 7, the support frame 5 includes a horizontal plate 51 formed in a rectangular frame shape having an opening at its center, a vertical plate 53 vertically connected from the outer edge of the horizontal plate 51, And an access plate 55 vertically connected from an end of the vertical plate 53 and being placed on the upper surface of the ceiling panel 20 when installed.

The horizontal plate 51 is formed in a rectangular frame shape having a central opening, and bolt holes 511 passing through both sides are formed with intervals. At this time, the bolt holes 511 are formed corresponding to the positions and the number of the bolt grooves 3112 of the latching jaw 311 of the housing 31.

In addition, the inside diameter of the dressing plate 55 is larger than that of the installation hole 21 of the ceiling panel 20. [

A packing member 59 made of silicone or the like having the same shape as that of the bowl plate 55 is attached to the bottom surface of the bowl plate 55 so that external foreign substances and moisture inflow through the setting holes 21 are thoroughly blocked.

When the horizontal plate 51 is seated in the latching jaw 311 of the housing 31 during the installation, the bolt holes 511 and the latching jaw 311 of the support frame 5, And is coupled to the housing 31 as the bolts are fastened through the bolt grooves 3112. [ At this time, the vertical plate 53 of the support frame 5 is brought into close contact with the outer surface of the housing 31, and the decorative plate 55 is brought into contact with the upper surface of the ceiling panel 20, 20 can be inserted into the installation hole 21 of the ceiling panel 20, the accessory plate 55 is caught by the ceiling panel 20, and the lamp body 3 can be firmly supported without being detached downward.

FIG. 8 is an exemplary view for explaining an installation process of the present invention, and FIG. 9 is an exemplary view showing a state where the present invention is installed on a ceiling panel according to FIG.

Referring to FIGS. 8 and 9, the operation of the GMP lighting apparatus 1 according to the present invention will be described. The lighting apparatus 1 includes a housing 31, a cover 33 and a cover plate 35, Is inserted into the installation hole (21) of the panel (20) in the direction from the bottom to the top. At this time, when the luminaire body 3 is pushed upward in the direction from the lower part to the upper part, the upper surface of the cover 33 comes into contact with the lower surface of the ceiling panel 20.

In this state, the support frame 5 is mounted on the outer side of the housing 31 protruded to the upper portion of the ceiling panel 20, and then the support frame 5 and the housing 31 are engaged through bolts. At this time, the decorative plate 55 of the support frame 5 is supported on the upper surface of the ceiling panel 20 to support the luminaire body 3 so as not to be detached from the ceiling panel 20, And bolt fastening of the ceiling panel 20 to further increase the robustness.

As described above, the GMP lighting apparatus 1 according to the embodiment of the present invention is provided with the housing 31, the cover 33, and the cover plate 35 as an integral unit of the luminaire body 3 so that the airtightness, It is possible to dramatically reduce the work time and the workability can be simplified and the complex work for joining each equipment at the time of installation is not performed.

The GMP light fixture 1 according to the present invention is constructed such that the support frame 5 having a larger area than the installation hole 21 of the ceiling panel 20 when installed is attached to the outer surface of the housing 31, Can be supported on the upper surface of the ceiling panel 20 to firmly support the luminaire body 3 embedded in the installation hole 21 of the ceiling panel 20.

The lighting apparatus 1 for GMP according to the present invention is characterized in that a hooking protrusion 311 is formed on the outer surface of the housing 31 so as to have an outer diameter in a stepped structure and the horizontal plate 51 of the support frame 5 is hooked The vertical plate 53 is mounted on the outer surface of the housing 31 to increase the contact area between the support frame 5 and the housing 3 so that the coupling between the housing 3 and the support frame 5 .

Fig. 10 is a side sectional view showing a second embodiment of the present invention, and Fig. 11 is a perspective view showing a luminaire body from which the cover plate of Fig. 10 is removed.

FIG. 10 is a GMP lighting apparatus 200 according to a second embodiment of the present invention. The GMP lighting apparatus 200 is provided to overcome the problems of FIGS. 2 to 9 described above. Referring to FIG. 3, 2 to 9, which are one embodiment of the present invention, the support frame 5 and the housing 31 are connected only by the fastening force of the bolt, and the support frame 5 is moved in the direction in which the support frame 5 receives the load When the bolt is fastened or loosened, the luminaire body 3 may be detached from the installation hole 21 and fall into the clean room.

As shown in FIG. 10, the GMP lighting apparatus 200 comprises a lamp body 203 and a support frame 205.

The lamp body 203 is composed of a housing 231 and a cover 33, a cover plate 35 and a light source 37 having the same structure as that of Figs. 2 to 5 described above.

The housing 231 has the same shape and configuration as those of Figs. 2 to 5, and insertion holes 2313 are formed at intervals on either side of the opposed sides.

At this time, the insertion holes 2313 are formed on the side of the upper portion of the locking protrusion 2311 of the housing 231, and the locking protrusions 2611 of the support frame 205 are inserted into the insertion holes 2313, respectively.

12 is a perspective view showing the support frame of Fig. 10, Fig. 13 is a side sectional view taken along the line A-A 'in Fig. 12, Fig. 14 is a side sectional view taken along line B- 12 is an exemplary view illustrating an operation process of the support frame of Fig.

12 to 14, the support frame 205 includes a first support frame 251, a second support frame 253, and guide rods 255 and 255 '.

The first support frame 251 is formed of a frame having a U shape and assembled with the second support frame 253 to form a rectangular frame shape.

The first support frame 251 includes a center frame 260 and vertical frames 270 and 280 vertically connected to both ends of the center frame 260.

At this time, the center frame 261 and the vertical frames 270 and 280 are composed of a horizontal plate 2511, a vertical plate 2513, and a plate 2515 as shown in FIGS.

The center frame 261 is formed with a pair of locking protrusions 2611 protruding in a rectangular shape from one side on one surface of the vertical plate 2513 in the direction in which the vertical frames 270 and 280 are connected, 2611 are inserted into the insertion holes 2313 of the housing 231 at the time of assembly so that the housing 231 can be firmly supported at the time of assembly.

The vertical frame 270 is formed with guide inserting grooves 2711 inwardly in the end face of the accommodating plate 2515.

In addition, the guide insertion groove 2711 is formed with a spring retaining step 2713 extending inward at a point connected to the end surface of the accommodating plate 2515.

One end of the guide rod 255 is inserted into the guide insertion groove 2711.

Since the other vertical frame 280 is formed in the same shape as the vertical frame 270, a detailed description thereof will be omitted.

The second support frame 253 is formed in the same shape as the first support frame 251, assembled with the first frame 251, and assembled into a rectangular frame.

The guide bar 255 is formed of a rod having a length.

At this time, both ends of the guide rod 255 are inserted into guide insertion grooves 2711 of the plate 2515 of the corresponding first vertical frame 270 of the first support frame 251 and the second support frame 253 And is formed to have a length twice as long as the depth of the guide insertion grooves 2711.

Further, the guide rods 255 are fixed to both ends of the fixing plates 2715 when they are engaged. At this time, the fixing plates 2715 are formed of a plate material having a larger area than the guide rods 255 to fix one end of the spring S.

The spring S is installed inside the guide insertion groove 2711. Specifically, the guide rod 255 is inserted into the guide groove 255, one side of the spring S is in contact with the fixing plate 2715 and the other side is in contact with the guide insertion groove 2711 And is brought into contact with the spring engagement step 2713.

That is, the spring S elastically supports the guide rod 255, so that the lengths of the first support frame 251 and the second support frame 253 can be varied in the opposite directions with respect to the guide rod 255 .

15, when the lamp body 203 is inserted into the support frame 205 at the time of assembling, the locking lugs 2611 of the GMP lighting fixture 200 of the present invention having the above- 231). Since the first support frame 251 and the second support frame 253 are configured to be variable in length in the direction facing each other, when the first support frame 251 is pushed in the opposite direction, the spring S The first support frame 251 is returned to the second support frame 253 by the resilient restoring force of the spring S when the pushing force of the first support frame 251 is released in this state, .

At this time, the engagement protrusions 2611 of the first support frame 251 are inserted into the insertion holes 2313 of the housing 231, respectively.

The second support frame 253 is also coupled to the luminaire body 203 in the same manner as the first support frame 251 so that the luminaire body 203 is supported by the engagement protrusions 2311 during the installation, It is possible to prevent the luminaire body 203 from dropping.

1: Lighting device for GMP 3: Lighting device body 5: Support frame
20: ceiling panel 21: mounting hole 31: housing
33: cover 35: cover plate 37: light source part
51: horizontal plate 53: vertical plate 55: tablet plate
311: latching jaw 313: rear surface of housing 3131:
511: Bolt groove

Claims (4)

CLAIMS 1. A lighting fixture embedded in an installation hole of a ceiling panel, comprising:
An upper body installed in the installation hole so that a lower portion thereof is exposed to the outside;
A support frame which is coupled to an outer side of the luminaire body which is embedded in an upper portion of the installation hole at the time of installation and which supports the luminaire body, Including,
The luminaire body
A housing in which upper and lower portions are opened;
A light source unit including a light source element, an electric circuit, a substrate, a power source, and a ballast, the inside of the housing;
A cover provided at a center thereof and coupled to a lower opening of the housing;
Further comprising a cover plate detachably coupled to an upper opening of the housing,
The lamp body is supplied in a state where the housing, the light source unit, and the cover plate are assembled,
The support frame
Further comprising a first support frame, a second support frame, guide rods, springs,
The first support frame and the second support frame
Further comprising vertical frames which are vertically connected to both ends of the central frame and in which guide inserting grooves are formed inwardly, respectively,
The guide rods
And both ends thereof are inserted into the guide insertion grooves of the vertical frame of the first support frame and the guide insertion grooves of the vertical frame of the second support frame,
The springs
The guide frames being inserted into both ends of the guide rods and being installed in the guide insertion grooves of the vertical frames of the first support frame and the guide insertion grooves of the vertical frames of the second support frame,
The fastening plates
The guide frames are formed of a plate material having a larger area than the springs and are coupled to both ends of the guide rods, and when installed, the guide insertion grooves of the vertical frames of the first support frame and the guide insertion grooves of the vertical frames of the second support frame Which is disposed in the inside,
The center frame of the first support frame and the center frame of the second support frame are formed with locking protrusions protruding in a rectangular shape on one surface in a direction facing each other,
Wherein the housing is formed with insertion grooves through which the engagement protrusions are inserted when assembled through the opposite sides of the housing. delete [2] The apparatus according to claim 1, wherein the housing is formed to have a latching protrusion extending along an arc at an outer side thereof, the outer side of the latching protrusion forming a stepped structure,
The support frame
A vertical plate which is vertically connected to the horizontal plate and which is connected to the outer side of the housing at the time of assembling the vertical plate and is vertically connected from the end of the vertical plate, And an accommodating plate for accommodating the accommodating plate,
The support frame and the housing are coupled through the bolt fastening of the horizontal plate and the engagement jaw,
And the access plate of the support frame is bolted to the ceiling panel. delete

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