JPH0352162B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a lighting fixture mounting section of an electromagnetically shielded ceiling of an electromagnetically shielded intelligent building suitable for adopting a network system using radio waves in the building. Regarding structure.

[Conventional technology]

Generally, in intelligent buildings, information communication equipment such as multi-purpose electronic exchanges and computers is shared to communicate information within the building and with the outside world. The amount of information is increasing. Under such circumstances, the challenge for buildings is how to provide large amounts of necessary information more quickly and at a lower cost. To address these issues in intelligent buildings, information networks based on the data highway system using optical fiber cables and coaxial cables have been studied and proposed.

[Problem that the invention seeks to solve]

However, with the data highway method that uses fiber optic cables and coaxial cables, fiber optic cables and coaxial cables must be laid out to every corner (terminal equipment) in an intelligent building, and the cables must be installed on the floor. Ducts and a double floor structure are required, and construction cost and construction time become an issue.

Also, if radio waves are used for information communication, there will be no need to lay cables, but in this case, on the one hand, frequencies up to 50 GHz will be subject to regulations under the Radio Law because they emit noise radio waves to the outside, and on the other hand, A problem arises in that the system malfunctions due to external radio waves or the like.

Therefore, the applicant has proposed various types of intelligent buildings that enable communication within the building using radio waves by constructing an electromagnetic shield for the entire building by using electromagnetic shielding members in the frame and openings such as windows and doorways. We are making proposals. by the way,
When communicating using radio waves in such an intelligent building, there are lighting fixtures and other power equipment that are noise sources in the ceiling, and countermeasures against malfunctions due to noise from these power equipment become a problem.

The present invention solves the above-mentioned problems, and aims to provide an electromagnetic shielding ceiling lighting fixture mounting structure that shields electromagnetic noise emitted from the lighting fixture to the lower surface.

[Means for solving problems]

To this end, the electromagnetic shielding ceiling lighting fixture mounting structure of the present invention comprises a ceiling plate using an electromagnetic shielding material and lighting fixtures embedded in the ceiling plate, and a steel plate below the lighting lamp. This device is characterized in that a louver is arranged, and a conductive material is sandwiched between the louver, the appliance body, and the appliance frame, and the louver is grounded to the electromagnetic shielding material of the ceiling board.

[Effect]

In the electromagnetic shielding ceiling lighting fixture mounting structure of the present invention, a louver made of a steel plate is arranged below the lighting lamp, and a conductive material is sandwiched between the louver, the fixture body, and the fixture frame to attach it to the electromagnetic shielding plate of the ceiling board. Since the louver is grounded, electromagnetic noise emitted from lighting lamps and the like can be shielded.

〔Example〕

Examples will be described below with reference to the drawings.

FIG. 1 is a diagram showing one embodiment of the structure of a lighting fixture mounting part of an electromagnetic shielding ceiling according to the present invention. In the figure, 1
is a steel plate fixture body, 2 is a ceiling board, 3 is a lighting fixture frame, 4 is a conductive material, 5 is a V-shaped spring, 6 is a louver,
7 indicates an illumination lamp.

In FIG. 1, the louver 6 is a grid-shaped louver made of a steel plate, and is attached to the lighting fixture frame 3 and electrically connected to the lighting fixture frame 3 through a conductive material 4. Furthermore, this lighting fixture frame 3 is electrically connected to the steel plate fixture body 1 through a conductive material 4, and from the steel plate fixture body 1 to a conductive part (an electrically grounded conductive part) of a building structural material such as a ceiling board 2. ) or connected to the ground wire. In this manner, in the electromagnetic shielding ceiling lighting fixture mounting structure according to the present invention, the louver 6
This shields electromagnetic noise emitted from the illumination lamp 7 and the appliance body to the bottom surface, and FIG. 1 shows a plan view thereof. This louver 6
In order to actually shield the electromagnetic wave noise emitted from the illumination lamp 7 to the lower surface, it is necessary to set the grid interval to correspond to the frequency used. For example, when the grid spacing is 30 mm as shown in FIG. 1b, it is equivalent to the wavelength (λ) of a frequency of 10 GHz, but a pitch of λ/10 is required for practical electromagnetic shielding performance. Therefore, sufficient electromagnetic shielding performance can be ensured for the operating frequency of 1 GHz, which is 1/10 of 10 GHz.

Next, another embodiment of the electromagnetic shielding ceiling lighting fixture mounting structure according to the present invention will be described.

Figure 2 is a diagram showing an example of a T-bar with built-in antenna used in an electromagnetic shielding ceiling system, and Figure 3 is a diagram showing the entire ceiling in which the entire ceiling has an electromagnetic shielding structure and an antenna is incorporated inside the room. . In the figure, 11 is a field edge, 12 is a T-bar receiver, 13 is a special T-bar, 14 is a ceiling board, 15 is an electromagnetic shielding material, 16
1 is a lighting device, 17 is an antenna, 18 is a conductive material, 1
9 is an insulating material, 21 is a slab, 22 is a hanging bolt,
23 is a reinforcing bar or grounding wire, 24 is a building frame, 25 is a crossover connection wire or conductive material, 26 is an air conditioning duct, and 27 is a suction/blowout shield member (filter).
shows.

In FIG. 2, the field edge 11 is suspended from the slab with hanging bolts, and the T-bar receiver 12 is fixed to this field edge 11, and the special T-bar 1
This supports point 3. As shown in the figure, the special T-bar 13 supports a ceiling plate 14, a lighting fixture 16, etc., and also allows an antenna 17 for wireless communication to be installed inside the room. This special T-bar 1
By incorporating the antenna 17 on the indoor side of No. 3 and configuring the ceiling using the ceiling plate 14 and lighting fixtures 16 that have electromagnetic shielding performance, the electromagnetic shielding space can be divided into each floor. Wireless communication can be performed by setting the frequency band to be used. When providing electromagnetic shielding performance to the ceiling, an electromagnetic shielding material 15 such as a conductive film is attached to the ceiling plate 14, and a conductive material 18 is used at the joint between the special T-bars 13 to electrically isolate the space between them. Connecting. Further, the antenna 17 is installed while being insulated from the special T-bar 13 using an insulating material 19, but in the case of an antenna that functions without an insulating material, the insulating material 19 may not be provided. In addition, as the antenna 17,
Leaky coaxial cables, waveguides, etc. can be used.

Figure 3 shows the entire ceiling with an electromagnetic shielding structure using the above-mentioned special T-bar and an antenna built into the indoor side. In FIG. 3, a louver having an electromagnetic shielding effect is used for the lighting fixture 16, and a suction/blowout shield member 27 is fitted into the opening of the air conditioning duct 26. By connecting this louver and the special T-bar 13 with a crossover connection wire or conductive material 25, it can be electrically integrated with the ceiling plate 14, or between the special T-bar 13 and the suction/blowout shield member 27. Electrically integrated by conductive material or direct contact. By connecting these to a grounded reinforcing bar or grounding wire 23, electromagnetic shielding performance of the entire ceiling surface can be ensured.
As a result, for example, lighting equipment ballasts and other power equipment placed in the ceiling are shielded from the room.
Malfunctions of indoor communication equipment due to these noises can be prevented.

The antenna built into the ceiling as described above can be used for wireless communication between communication devices installed on each floor by connecting it to a coaxial cable via a branch. In addition, coaxial cables can be used for shared TV viewing through EPS. In this way, by using the outer wall of the building as an electromagnetic shielding layer and further dividing the electromagnetic shielding space within the building into each floor, an independent wireless communication system is created for each floor without being affected by signals from outside or other floors. can. Therefore,
If you allocate n channels of frequency bands to each floor, within a building, each floor will have the same n channels regardless of the number of floors.
Wireless communication is possible using a frequency band of 25kHz x n using a channel. Furthermore, radio waves in any economically advantageous frequency band can be used regardless of regulations under the Radio Law.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, sufficient electromagnetic shielding performance can be ensured for electromagnetic waves of 1 GHz or higher, for example, by setting the louver grid spacing to 30 mm or less. Also,
By inserting a conductive material into the entire outer periphery between the main body, the fixture frame, and the louver, noise emitted from the lighting fixture to the bottom can be shielded.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of the structure of a lighting fixture mounting part of an electromagnetic shielding ceiling according to the present invention, FIG. 2 is a diagram showing an example of an antenna-embedded T-bar used in an electromagnetic shielding ceiling system, and FIG. The figure shows the entire ceiling with an electromagnetic shielding structure and an antenna built into the room. 1... Steel plate appliance body, 2... Ceiling plate, 3...
Lighting equipment frame, 4... Conductive material, 5... V-shaped spring, 6
... Louver, 7 ... Lighting lamp, 11 ... Wild edge, 12 ... T-bar receiver, 13 ... Special T-bar,
14... Ceiling board, 15... Electromagnetic shielding material, 16...
Lighting equipment, 17... antenna, 18... conductive material,
19...Insulating material, 21...Slab, 22...Hanging bolt, 23...Reinforcing bar, 24...Structure, 25...
Crossover connection wire, 26...air conditioning duct, 27...filter.

Claims (1)

[Claims] 1 The ceiling is constructed by placing a ceiling board made of electromagnetic shielding material and lighting fixtures embedded in the ceiling board, and a louver made of steel plate is placed below the lighting lamp, and the louver, the fixture body, and the fixture frame are A structure for mounting a lighting fixture on an electromagnetic shielding ceiling, characterized in that a louver is grounded to an electromagnetic shielding material of a ceiling board with a conductive material in between.