WO2005106150A1

WO2005106150A1 - Building structure for preventing infiltration of noise

Info

Publication number: WO2005106150A1
Application number: PCT/JP2005/008203
Authority: WO
Inventors: Takayasu Kanemura; Hiroko Kanemura; Tomoko Kojima; Atsuko Yamamoto
Original assignee: Takayasu Kanemura; Hiroko Kanemura; Tomoko Kojima; Atsuko Yamamoto
Priority date: 2004-04-28
Filing date: 2005-04-28
Publication date: 2005-11-10
Also published as: JP4599884B2; JP2005314965A

Abstract

[PROBLEMS] To protect office automation apparatuses used in buildings as well as electronic equipment such as substrates, power supply/communication cables, and others in precision equipment against not only noise such as direct strike of lightning, lightning surge current, radio wave, electromagnetic wave, and others infiltrating from the outside therein but also noise such as radio wave, electromagnetic wave, and others generated indoors. [MEANS FOR SOLVING PROBLEMS] The house top (R) and each floor (F) of a building (B) are constructed by arranging reinforcements (7), laying steel plates, conductive boards, or metal nets (1), welding the steel plates, conductive boards, or metal nets to house top foundation reinforcements and floor foundation steel frames (3), and solidifying them with a concrete (8). Steel plates or the metal nets (1) and the foundation reinforcements (3) are electrically connected to the structural foundation steel frames (2) of the building (B) with metal bolts (5) and leads (6). An outer wall is constructed by laying the metal nets (1), welding the metal nets to the wall foundation reinforcements (3), and solidifying them with the concrete (8) or sticking concrete boards (4) thereon. The wall foundation steel frames (3) are electrically connected to the structural foundation steel frames (2) of the building to escape noise currents such as the direct strike of lightning, lightning surge current, radio wave, electromagnetic wave, static electricity, and others to the earth.

Description

Specification

Noise intrusion prevention building structure

Technical field

The present invention relates to direct lightning, lightning surge currents, radio waves, and electromagnetic waves that penetrate electronic devices such as OA equipment used in buildings, boards in precision equipment, power supply-communication cables, etc., from outside. This is related to a noise intrusion prevention building structure to protect against noise.

Background art

[0002] Currently, digital TV relay stations, radio relay stations, IC manufacturing plants and component assembly plants, data centers, financial 'defense' administrative facilities and medical facilities around the world, including Japan, have reinforced concrete structures. Things are mainstream. For example, to protect external surge currents generated by lightning strikes (hereinafter simply referred to as noise currents) and other electronic devices, it is common to connect lightning arresters and noise current cut-off devices. It is being done.

[0003] Wireless communication and television relay stations · Buildings related to mobile phone stations have towers on the rooftops, antennas installed, and a centralized data center or network using transmitters and supercomputers indoors. Computer centers are operating around the clock, but protection measures against all noise currents described above have not been taken. In other words, conventional protection measures for general building structures have been focused on natural phenomena such as earthquakes, storms and floods including lightning, and human fires.

[0004] Lightning is conventionally handled with a lightning rod or lightning arrester. For example, a vertical lightning conductor is fixed to the wall of a high-rise building, this vertical lightning conductor is electrically connected to the building's reinforcing steel or steel frame via anchor bolts, and the lightning current that has been struck by lightning on the outer wall is reinforced by a reinforcing steel or steel frame. A technology that releases power also has been proposed (see Patent Document 1).

Patent Document 1: Japanese Patent No. 3251928 (pages 2 to 3, FIG. 5)

Disclosure of the invention

[0006] In recent years, lightning noise countermeasures have been gradually attempted for electrical equipment and OA equipment.

Lightning rods or lightning arresters are used to counter lightning. When a lightning arrester is installed, the reaction voltage cannot be controlled to a medium or low level (300V to 3000V), such as induced lightning, and equipment is destroyed. Also, even if measures for lightning arresters for medium and low voltage are applied to all facilities in the building, maintenance from high voltage noise (1 to 5 million V or 10 million V) has not been measured at present. This is also due to the fact that the equipment designers differ in the selection of lightning protection equipment. Therefore, maintenance can be performed for extremely high voltage noise with an operating voltage of about 4 million V. However, if a surge current of 1500 V or less flows, the surge arrester does not respond and passes through a breaker or outlet and flows into the equipment board. In addition, the influence of noise also appears on the communication lines wired in the floor. For this reason, the reaction current of the noise measurement equipment is also provided for all equipment for 20A (ampere). In hospitals, etc., the corridor and the hospital room or the operating room and the examination room are partitioned, and some floors are laid with electromagnetic wave prevention floor panels.Floor panels that reflect electromagnetic waves Forces to take measures to ground noise current Had not been.

[0007] Lightning noise at the time of lightning strike is firstly lightning (electromagnetic waves), and the power supply in the building, the communication cable for the surveillance camera, and the "wireless cable for the TV" serve as a receiving antenna because it is a conductor, The noise current flows, and the board of the equipment is destroyed. That is, the roof equipment is destroyed before a lightning storm or lightning strikes on the roof of the building. In addition, with the accelerating spread of information devices such as mobile phones, mobile terminals, PHS, wireless LAN, and wireless microphones in business offices, various electromagnetic waves are scattered in offices, and accidents and adverse effects due to such electromagnetic waves cannot be ignored.ヽ It is getting into a state.

[0008] Furthermore, the free access inside the floor that is currently generally used has a structure not connected to the earth ground, and the top plate and the supporting legs are made of plastic and insulated. For this reason, the charged static electricity and electromagnetic waves may be discharged in the free access where dust is accumulated, or discharged in the free access, which may cause noise damage to the cable or cause a fire. Absent. The electromagnetic wave prevention floor partition also has a structure that reflects electromagnetic waves and is not connected to ground, so if electromagnetic waves pass through or reflect on the floor partition or become charged, electric waves will be reflected. Electronic devices on the floor and on each floor of the building have been damaged.

[0009] Therefore, when trying to connect the electromagnetic wave prevention floor partition to the earth ground, The cable is routed from the ground to the ground, and the power of the ground cable itself acts like a transmitting and receiving antenna.It is converted into a primary coil and converted into a power supply line 'communication line' and 'weak wire' on the floor. Cables ・ Electromagnetic induction occurs in wireless cables, etc., causing noise current. Semiconductors and system LSIs used in the boards of today's electronic devices operate with a DC power supply of 5 V, but the personal computer suddenly freezes due to weak radio waves, such as those generated when transmitting and receiving mobile phones. Occurs frequently.

[0010] In addition, when a radio relay station is installed on the roof of a building within a few hundred meters of a neighborhood and high-power radio waves are transmitted, the radio waves are transmitted not only within the building but also to electric wires and all cables (communication lines Weak electric wires, surveillance camera cables, television cables, wireless cables), an excess current is generated in the primary coil of the transformer in the electronic device board, and an overcurrent flows through the IC'LSI etc. in the DC board, causing And even software is destroyed. Voltage modulation noise during operation of elevator motors and cooler fan motors used in buildings can also cause malfunctions. In particular, conventional metal pipes could prevent noise interference, but recently, as a method of building domestic buildings, electric wires, communication wires, and alarm wires were passed through plastic pipes. The effect of noise has become noticeable. In the future, as measures to standardize the operating voltage of semiconductors and system LSIs used in substrates from 5V to 3V, measures against noise from the rooftop of the building and noise generated indoors in the building will be taken. It is urgent.

[0011] In order to achieve the above object, in the noise intrusion prevention building design structure according to claim 1 of the present invention, the rooftop and each floor of the building are provided with an iron plate or a conductive board or a wire mesh, and a rooftop reinforcing bar is provided. After welding on the top or floor foundation reinforcement, solidify it with concrete and construct it.Electrically connect the iron plate board or the wire mesh and the reinforcement to the structural foundation steel frame of the building. After welding to the rebar, solidify it with concrete or attach a concrete board and construct it.Connect the wall foundation rebar electrically to the structural foundation steel frame of the building, and conduct direct lightning, lightning surge current, radio wave, electromagnetic wave, etc. The feature is that the noise of the air escapes to the ground. In the noise intrusion prevention building structure according to claim 2, a wire mesh is installed inside and outside of the building in an electromagnetic wave absorbing glass or glass, and the wire mesh is electrically connected to the metal window frame. The metal window frame to the building steel frame Electrically connected to the floor, the free access floor or the iron plate or wire mesh on the floor to release noise such as direct lightning, lightning surge current, radio waves, electromagnetic waves, etc. absorbed by the wire mesh in the window glass to the ground. It is characterized by the following. Further, in the noise intrusion prevention building structure according to claim 3, the ceiling and the partition in the building are made of metal, and the ceiling and the partition are installed on the building's steel frame, ground cable, free access floor or floor. It is electrically connected to an iron plate board or a wire mesh, and discharges noise such as direct lightning, lightning surge current, radio waves, electromagnetic waves, and static electricity absorbed by the ceiling and the partition to the ground.

Brief Description of Drawings

FIG. 1 is a perspective view schematically showing a noise intrusion prevention building structure according to the present invention.

FIG. 2 is a perspective view illustrating a method of laying a roof and a floor.

FIG. 3 is a perspective view schematically showing a free access construction method according to the present invention.

FIG. 4 is an enlarged perspective view of a main part of FIG. 3.

FIG. 5 is a front view schematically showing a construction state of the first floor of the building according to the present invention.

FIG. 6 is a plan view showing a grounding board provided in free access.

FIG. 7 is a perspective view schematically showing one embodiment of a building according to the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

Next, embodiments of the present invention will be described based on examples shown in the drawings.

Example

[0014] In Figs. 1 and 2, the building structure according to the present invention is constructed such that a roof R and a floor F of a building B are provided with a reinforcing bar 7, and then an iron plate or a conductive board or a wire mesh 1 is extended. After welding on the upper foundation steel or the floor foundation steel 3, it is hardened with concrete 8 and constructed.The steel plate or conductive board or the wire mesh 1 and the reinforcement 3 are attached to the structural foundation steel 2 of the building B with metal bolts 5. Electrical connection with conductors 6 and the outer wall is laid with a wire mesh 1 and welded to the wall foundation reinforcing steel 3 and then hardened with concrete 8 or affixed with a concrete board 4 and applied. 3 is electrically connected to the structural foundation steel frame 2 of the building so that noise such as direct lightning, lightning surge currents, radio waves, electromagnetic waves, etc., can escape to the ground. 4 is buildin A wire mesh 1 is installed inside the board 4 with a concrete bow or window glass attached to the outer wall surface of the wall B, and is electrically connected to the wall foundation steel frame 3 by metal bolts 5.

[0015] Similarly, the window glass inside and outside the building B is made of electromagnetic wave absorbing glass, or the wire mesh 1 is extended in the glass, and the wire mesh 1 in the electromagnetic wave absorbing glass or glass is electrically connected to the metal window frame. In addition to the connection, the metal window frame is electrically connected to the building's steel frame, earth cable, free access floor or iron plate or wire mesh on the floor, and direct lightning absorbed by the wire mesh in the window glass. Noise such as lightning surge current, radio wave, electromagnetic wave, etc. may be released to the ground. Structural foundation steel frame 2 of building B is usually a pile spiral spiral bar at the underground part connected to the foundation, and a copper or iron plate earth plate 2A is welded to the bottom layer and intermediate layer, and the earth resistance of each layer of the earth is When the value is low, excess current is caused to flow quickly into the stratum.

As shown in FIG. 3 to FIG. 5, on each floor F of the building B of the present invention, a plurality of free access boards 9 are bridged by metal support bundles 12 so that free access floors (2 (Heavy floor) FA is installed. Here, the free access board 9 is an iron plate or a conductive board, which is screwed to a joint portion with a set screw 10 via a metal washer 11 and a crimp terminal 13 on a bottom plate of the support bundle 12. Earth cable 14 is connected. The ground cable 14 is electrically connected directly to the floor foundation reinforcement 3 or connected to the floor foundation reinforcement 3 via the free access grounding board 15 at the shortest distance. That is, if an electromagnetic wave prevention floor partition (not shown) installed in the floor F is to be connected to the earth ground, the earth ground force cable will be routed, and the earth cable itself will have the same effect as the transmitting / receiving antenna. This causes a primary coil, which causes electromagnetic induction in the power line, communication line, and weak wire in the floor, generating noise current. Therefore, this can be avoided by electrically connecting a later-described floor partition 30 directly to the metal washer 11 or the set screw 10 of the free access board 9. As a result, noise such as static electricity generated indoors (static electricity charged to the human body or static electricity caused by air friction from air conditioning equipment) can be released to the ground. In addition, it is possible to prevent the personal computer from suddenly freezing due to a weak radio wave, for example, a radio wave generated when transmitting / receiving a mobile phone. FIG. 6 shows a free access earth panel 15 used in the present invention. The free access grounding board 15 is buried at an arbitrary location of the free access floor FA, houses a HUB 19 and an outlet 20, stores lightning arresters 18 for discharging overvoltage caused by external surges, and operates the lightning arresters 18. There is provided a counter 17 for counting the number, that is, the number of discharges via the inversion 16. The lightning arrester 18, the transformer and the counter 17 are also housed in a server 23 and a distribution board 24 described later. A three-pole discharge element 18a, 18b and 18c, which is grounded to earth and connected to a power line and a signal line, as a discharge element for the surge arrester 18 for discharging overvoltage caused by the intrusion of external surge current, and a HUB A discharge element 18d is provided between the outlet 19 and the outlet 20. In addition, a wristband 19 to be attached to the worker who performs construction and maintenance is connected to the free access grounding board 15 so that noise current due to static electricity and electromagnetic waves charged to the worker can be removed at the time of wiring work. I have. In addition, a noise filter 21 is provided on the free access earth panel 15 provided particularly on the first floor. This is because the response start voltage of the discharge elements 18a, 18b, 18c and 18d is from 200V to 400V, so that noise from 100V to 200V is removed and the backflow of the electricity charged on the ground is prevented.

FIG. 7 is an explanatory diagram showing one embodiment of the room configuration of the building according to the present invention. In this building, the entire wall surface and ceiling surface of the room are surrounded by an outer wall 4 made of concrete or the like with a steel plate or conductive board or wire mesh installed inside, and the leakage of electromagnetic waves from indoor and external mobile phones 27 etc. In addition to being constructed so as not to be affected by invasion of electromagnetic waves or the like, a conductive mat 22 is laid on the floor surface, and an earth cable 14 connected to the conductive mat 22 is connected via the steel frame 3 of the building. It is connected to a ground plate (not shown) buried in the ground. Here, it is desirable to use a twisted cable that is hardly affected by external electromagnetic waves as the ground cable 14. The server 23 installed in the room is housed in a 19-inch rack, which is a metal box, connected to a public telephone line via a router to enable data communication with remote locations, and the number of discharges detected by the surge counter circuit. Can be visually displayed on the display of a personal computer installed in a remote place. The server 23 is also connected to the outlet box installed on each floor of the building via a HUB stored in a 19-inch rack, and to a distribution board 24 containing communication cables via a network cable. Connected. In the figure, reference numeral 30 denotes a floor partition, which is made of metal or a conductive material, is electrically connected to the free access floor FA, and allows noise current due to electromagnetic induction or the like to flow to the ground via the free access grounding board 15. Can be. 31 is a door, which is also made of metal or conductive material. When the static electricity charged on the human body enters the floor, it can be discharged to the ground by touching the door 31.

[0019] These HUBs, outlet boxes, and distribution boards 24 are provided with the above-mentioned lightning arresters 18, transformers 16 and counters 17, and also include a desk 25 placed indoors, including a desk 25 arranged in the room. Band 19 is connected and measures against static electricity are taken. As a result, it is possible to perform lightning arrest on all electric wires drawn in from the outdoors. Needless to say, it is possible to determine whether the noise current that caused the destruction of the device is due to lightning, static electricity or electromagnetic waves.

Industrial applicability

[0020] According to the present invention, a surveillance camera, a TV, an OA device used in a building, a substrate in a precision device, a power supply, a communication cable for a TV, a radio, and a surveillance camera are connected. Electronic devices that are exposed not only from noise currents such as direct lightning, lightning surge currents, radio waves, electromagnetic waves, and static electricity that enter from outside, but also noise currents such as radio waves, electromagnetic waves, and static electricity that occur indoors. Can be protected.

Claims

The scope of the claims

[1] The rooftop and each floor of the building are constructed of iron plate or conductive board or wire mesh, welded on the roof top reinforcement or floor foundation reinforcement, then solidified with concrete and constructed, and the iron plate or conductive board Alternatively, the wire mesh and the reinforcing steel are electrically connected to the structural foundation steel frame of the building, the outer wall is extended with a wire mesh, welded to the wall foundation steel, and then hardened with concrete or affixed with a concrete board. The wall foundation reinforcement is electrically connected to the structural foundation steel frame of the building to release noise such as direct lightning, lightning surge current, radio waves, electromagnetic waves, etc. to the ground, and piles buried underground connected to the foundation ( The copper wire or iron plate is welded to the bottom and middle layers of the spiral streaks), the ground resistance of each layer in the earth is low, and the excess current flows quickly to the ground layer.

[2] The window glass of the building is made of electromagnetic wave absorbing glass or a wire mesh is laid in the glass, and the electromagnetic wave absorbing glass or the wire mesh is electrically connected to a metal window frame, and the metal window frame is Direct lightning, lightning absorbed by electromagnetic wave absorbing glass or wire mesh in window glass, electrically connected to the building's steel frame, ground cable, free access floor or iron plate or conductive board or wire mesh on the floor A noise intrusion prevention building structure characterized by allowing noise such as surge currents, radio waves, and electromagnetic waves to escape to the ground.

[3] The ceiling and partitions or doors in the building are made of metal or conductive material, and the ceiling and partitions or doors are made of steel frames, earth cables, free access floors or steel plates on the floor of the building. Direct lightning, lightning surge currents, radio waves, electromagnetic waves, static electricity (static electricity charged on the human body or air frictional static electricity from air conditioning equipment) etc., which are electrically connected to a conductive board or wire mesh and absorbed by the ceiling and partition or door A noise-intrusion-prevention building structure that allows noise to escape to the ground.