JPS62233011A - Electromagnetic shielded ceiling system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electromagnetic shielding intelligent building AM shielding ceiling system suitable for employing a network system using radio waves in a building.

[Conventional technology]

-M In intelligent buildings, information and communications equipment such as complex electronic exchanges and computers are shared to communicate information within the building and with the outside world. As a result, the amount of information is increasing. Under such circumstances, the challenge for buildings is how to quickly provide large amounts of information in response to requests at low 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 optical fiber cables and coaxial cables, optical fiber cables and coaxial cables must be stretched to every corner (terminal equipment) in an intelligent building, and cables must be laid in floor ducts and A heavy floor structure is required, and the construction cost and construction period cannot be ignored.

Also, if radio waves are used for emotional 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 made various proposals regarding an intelligent building that uses electromagnetic shielding materials in the frame and openings such as windows and doorways to create an electromagnetic shield structure for the entire building, thereby making it possible to communicate within the building using radio waves. Is going. However, when communicating using radio waves in such an intelligent building, if n channels of frequency bands are assigned to each floor, in a building with m floors, n×
A frequency band of m channels is required. Therefore, if the frequency bandwidth of each channel is 25kHz, one i! The required frequency bandwidth in a magnetically shielded space is 25 kHz
There is a problem in that as the area becomes wider, the communication equipment also becomes larger.

In addition, there are lighting fixtures and other power equipment that are noise sources in the ceiling, and malfunctions due to noise from these power equipment can also be a problem.

The present invention is intended to solve the above-mentioned problems, and aims to provide an electromagnetic shielding ceiling system that can reduce the number of wireless communication channels carried out in a building and can shield noise from power equipment, etc. It is something to do.

Means for Solving Problem C] To this end, the electromagnetic shielding ceiling system of the present invention uses a special T-bar that has a space for incorporating an antenna on the indoor side as a T-bar that supports ceiling structural members such as ceiling panels and lighting equipment. The special T-bar and the conductive part of the ceiling structural member are electrically integrated and connected to the ground, and are insulated from the special T-bar by an insulating material, and an antenna is incorporated therein.

[Effect]

In the electromagnetic shielding ceiling system of the present invention, the attic and the room are electromagnetically shielded, and the antenna is built into the ceiling, so indoor communication equipment etc. are prevented from malfunctioning due to noise generated from power equipment placed in the attic. It can be prevented. Furthermore, by electromagnetically shielding each floor, it is possible to communicate using electromagnetic waves in the same frequency band, and communication equipment with the same specifications can be used on each floor.

〔Example〕

Examples will be described below with reference to the drawings.

FIG. 1 is a diagram showing one embodiment of the electromagnetic shielding ceiling system according to the present invention, and FIG. 2 is a diagram showing the entire ceiling in which the entire ceiling has an electromagnetic shielding structure and an antenna is installed on the indoor side. In the figure, 1 is a field edge, 2 is a T-bar receiver, 3 is a special T-bar,
4 is a ceiling board, 5 is an electromagnetic shielding material, 6 is a lighting fixture, 7 is an antenna, 8 is a conductive material, 9 is an insulating material, 11 is a slab, 12 is a hanging bolt, 13 is a reinforcing bar, 14 is a frame, 15 is a bridge 16 is an air conditioning duct, and 17 is a filter.

In Fig. 1, the field edge 1 is suspended from the slab with hanging bolts, and the T-bar receiver 2 is attached to this field edge 1.
It is fixed to and supports the special T-bar 3. As shown in the figure, the special T-bar 3 supports a ceiling plate 4, a lighting fixture 6, etc., and also allows an antenna 7 for wireless communication to be installed inside the room. Antenna 7 is built into the indoor side of this special T-bar 3, and ceiling plate 4 has electromagnetic shielding performance.
By configuring the ceiling using lighting fixtures 6 and the like, wireless communication becomes possible on each floor. If the ceiling has a shielding effect, use 11tiff shielding material 5 such as a conductive film on the ceiling board 4, and use conductive material 8 at the joint between special T-bars 3 to electrically connect them. do. Further, the antenna 7 may be installed while being insulated from the special T-bar 3 using an insulating material 9. Note that as the antenna 7, a leaky coaxial cable, a waveguide, etc. can be used.

Figure 2 shows the entire ceiling with an electromagnetic shielding structure and an antenna built into the room. Second
In the figure, a lighting fixture 6 uses a looper having an electromagnetic shielding effect, and a conductive mesh filter 17 is fitted into the opening of an air conditioning duct 16. Then, by electrically connecting this looper special T-bar 3 with a crossover connecting wire 15, it is integrated with the ceiling plate 4, or by connecting the special T-bar 3 and the filter 17 with a conductive material or direct contact. By connecting them to the ground and grounding them through the reinforcing bars 13, it is possible to provide an electromagnetic shielding effect to the entire ceiling surface.

As a result, the room is shielded from, for example, the ballast of lighting equipment and other power equipment arranged in the ceiling, and it is possible to prevent communication equipment in the room from malfunctioning due to these noises.

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. Note that the coaxial cable used for TV transmission through EPS can be used. In this way, by providing electromagnetic shielding not only on the outer wall surface of the building frame but also on the ceiling of each floor and dividing the electromagnetic shielding space into parts v1 for each floor, it is possible to allocate a frequency band to be used for each floor and perform communication. Therefore, by allocating an n-channel frequency band to each floor, wireless communication using the same n-channel frequency band width of 25 kHz x r1 is possible for each floor of the entire building, regardless of the number of floors. Furthermore, radio waves in any economically advantageous frequency band can be used regardless of regulations under the Radio Law.

Next, structural materials for ceiling panels and floor panels and lighting fixtures suitable for dividing an IIT magnetically shielded space into each floor in combination with the electromagnetically shielded ceiling system according to the present invention will be illustrated.

FIG. 3 is a diagram showing an example of an assembled board with a magnetic shielding structure used for ceiling boards and floorboards, where 21 and 24 are finishing materials, 22 is a shielding material, and 23, 25 and 26 are conductive films.

The assembly board shown in Fig. 3 is composed of a finishing material 21 and a shielding material 22 of the same size, and these are assembled into two parts as shown in Fig. 3 1bl.
They are made by shifting them in one direction and stacking them on top of the other. When these are lined up to form a ceiling or floor surface, the portion of the finishing material 21 that does not overlap will be connected to the shielding material 22 of the adjacent assembly board, and the portion of the shielding material 22 that will not overlap will be adjacent to it. Lay them out one on top of the finishing material 21 of the assembly board. When assembling boards are arranged in this way, if there is a gap between the shielding materials of adjacent assembling boards, radio waves will leak from there.
As shown in FIG. 3, 1bl, electromagnetic shielding performance is ensured by pasting a conductive film 23 on the surface of the finishing material 21 that is in contact with the shielding material 22.

Also, instead of the shielding material 22 shown in FIG. 3('b), a finishing material 25 similar to the finishing material 21 as shown in FIG. 3(C) is used.
The conductive film 25 may be attached to the overlapped surface using the conductive film 25. Furthermore, for convenience, the conductive film 25 may be attached only to the portion of the finishing material 21 that does not overlap with the shielding material 22, as shown in FIG. 3 (di). The conductive film 26 may be attached to the surface.

FIG. 4 is a diagram showing one embodiment of an electromagnetic shielding type lighting fixture, in which 31 is a steel plate fixture body, 32 is a ceiling plate, 33 is a lighting fixture frame, 34 is a conductive material, 35 is a figure 7 spring, and 36 is a The looper 37 indicates an illumination lamp.

In FIG. 4, the looper 36 is a lattice-shaped looper made of steel plate, which is attached to the lighting fixture frame 33 and electrically connected to the lighting fixture frame 33 through a conductive material 34. Furthermore, this lighting fixture frame 33 is made of a conductive material 3 as well as the steel plate fixture body 31.
4, and is connected from the steel plate appliance main body 31 to a conductive part (an electrically grounded conductive part) of a building structural material such as a ceiling board 32. In this way, in the electromagnetic shielding type lighting fixture according to the present invention, the looper 36 shields electromagnetic wave noise emitted from the lighting lamp 37 and the fixture body to the lower surface, and the top view of this is shown in FIG.
This looper 36 allows the illumination lamp 37 to be
In order to actually shield the 1iltVA wave noise emitted to the lower surface from the 1iltVA wave noise, it is necessary to set the grid interval to correspond to the frequency used.

For example, if the grid spacing is 30fflI11, I
Although it is equal to the wavelength (λ) of the OGHz frequency, a pitch of λ/10 is required to ensure the image performance of a practical electric T61. Therefore, when the operating frequency is IGHz, which is 1/10 of 10 GHz, sufficient electromagnetic shielding performance can be ensured.

Note that the present invention can be modified in various ways and is not limited to the above embodiments.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, it is possible to construct a system that divides the electric Ti 1m shielding space in a building by the ceiling surface, so that the frequency band can be selected independently on each floor, and the entire building can be In this case, each floor can use a communication device that uses the same frequency band or repeats multiple bands. Therefore, each floor can use the same specifications or a limited number of communication equipment, allowing for standardization of communication equipment regardless of the size of the building.
Equipment costs can be reduced. In addition, by shielding the living room where radio waves are used and the ceiling where there are many noise sources such as lighting lamp ballasts and power lines, a suitable wireless communication environment can be realized.

[Brief explanation of drawings]

Fig. 1 is a diagram showing one embodiment of the electromagnetic shielding ceiling system according to the present invention, Fig. 2 is a diagram showing the entire ceiling in which the entire ceiling has an electromagnetic shielding structure and an antenna is installed on the indoor side.
The figure shows an example of an assembly plate with an electromagnetic shielding structure used for a ceiling board or a floorboard, and FIG. 4 shows an example of an electromagnetic shielding type lighting fixture. 1... Wild edge, 2... T-bar receiver, 3... Special T-bar, 4... Ceiling board, 5... Electromagnetic shielding material, 6... Lighting equipment, 7... Antenna , 8... conductive material, 9...
&i! I edge material, 11...Slab, 12...Hanging bolt, 13...Reinforcing bar, 14...Structure, 15...Cover connection wire, 16...Air conditioning duct, 17...Filter, 21 and 24...finishing material, 22...shielding material, 23
．． 25 and 26... Conductive film, 31... Rope board fixture body, 32... Ceiling board, 33... Lighting fixture frame,
34... Conductive material, 35... V-shaped spring, 36... Louver, 37... Illumination lamp. Applicant: Shimizu Corporation Patent Attorney Ryukichi Abe (2 others) Figure 1 Figure 2

Claims (2)

[Claims] (1) A T-bar with an antenna built-in structure on the indoor side is used as a T-bar that supports ceiling structural members such as ceiling panels and lighting equipment, and the T-bar and the conductive part of the ceiling structural member are electrically integrated. An electromagnetic shielding ceiling system characterized by incorporating an antenna that is connected to the ground and insulated from the T-bar using an insulating material. (2) The electromagnetic shielding ceiling system according to claim 1, wherein the T-bar and the conductive part of the ceiling structural member are electrically integrated using a conductive material.