JP2015012460A - Tunnel radio communication assist facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible a tunnel radio communication assist facility that is able to be simply and easily installed even in an existing tunnel without having an impact on a tunnel skeleton and is low in cost.SOLUTION: An antenna 18 is provided at a fire extinguisher housing device 12 installed at a predetermined interval in a tunnel 10, and a splitter 16 is housed in the fire extinguisher housing device 12. A power supply coaxial cable 26 is laid from a fire radio connection box 20 and police radio connection box 22 installed at an entrance of the tunnel via a shared device 24, sequentially going through fire extinguisher housing devices 12 in the tunnel 10, to another fire radio connection box 20 and police radio connection box 22 installed at an entrance of the tunnel via a shared device 24. An input terminal and an output terminal of the splitter 16 installed in the fire extinguisher housing device 12 are connected to the power supply coaxial cables 26 situated on both sides of the splitter 16, and the antenna 18 is connected with a branch terminal.

Description

The present invention relates to a tunnel radio communication auxiliary equipment for use in communication with the outside of a tunnel in the case of rescue activities, fire fighting activities, and the like in a tunnel.

  Conventionally, emergency equipment in road tunnels includes emergency telephones, fire alarms and other reporting / alarming equipment, fire extinguishers and fire hydrants, refuge guidance equipment, and other equipment such as wireless communication auxiliary equipment. The emergency equipment to be installed is determined according to the tunnel grade that can be extended and the traffic volume per day.

  Of these, the AA class with tunnel lengths exceeding 10,000m requires the installation of wireless communication auxiliary equipment for communication with the outside of the tunnel for rescue and fire fighting activities in the tunnel. Is in the A grade of 3000 to 10000 m, it is assumed that wireless communication auxiliary equipment will be installed as necessary.

  This wireless communication auxiliary equipment is composed of an antenna installed in the tunnel and a wireless device installed outside the tunnel mine. Leaky coaxial cables are used for the antennas installed in the tunnel. The leaky coaxial cable is provided with a slot for radiating radio waves on the coaxial cable, and is called LCX (Leaky Coaxial Cable).

Radio equipment to be installed outside the tunnel mine is used when the base station, relay station, etc. are always installed, and when the radio equipment is brought in only when necessary and connected to the aerial system using the connection terminal of the radio connection box. For example, wireless connection boxes for connecting fire fighting radios and wireless connection boxes for connecting police radios are installed.

JP 2006-155495 A

  By the way, such a tunnel wireless communication auxiliary equipment is not obliged to install in the case of class B where the tunnel extension is 1000 to 3000 m. You may want to install auxiliary equipment.

  Therefore, it is conceivable to install a wireless communication auxiliary equipment for installing a leaky coaxial cable in the tunnel as in the case of the AA grade and the A grade for the B grade tunnel.

  However, leaky coaxial cables are thick and heavy in structure, so the workability at high places is poor, and tunnel side wall mounting is standard in consideration of construction safety, and when leaky coaxial cables are laid in an existing tunnel It is necessary to attach a hanging bracket to the tunnel side wall, which has a problem of affecting the tunnel frame.

  In addition, the leaky coaxial cable is expensive because it has a special structure, and there is a problem that the cost burden is large.

It is an object of the present invention to provide a tunnel radio communication auxiliary equipment that can be easily and easily installed even in an existing tunnel without affecting the tunnel housing and can be realized at low cost.

(Wireless communication auxiliary equipment)
The present invention provides a tunnel radio communication auxiliary equipment,
An antenna that is provided in a plurality of equipment installed in the tunnel at predetermined intervals, and that is connected to a wireless communication device used in the tunnel;
A wireless connection box installed at one or both of the tunnel wellheads and having a connection terminal for connecting a wireless communication device;
A coaxial cable for power feeding installed in the other wireless connection box of the tunnel wellhead or the other of the tunnel wellhead, sequentially through the equipment in the tunnel from one wireless connection box of the tunnel wellhead,
A branch device installed inside the equipment and connected to one input coaxial cable located on both sides to the input terminal and the other supply coaxial cable to the output terminal, and an antenna connected to the branch terminal;
It is provided with.

(Fire extinguisher storage device)
Here, the equipment is a fire extinguisher storage device in which a door that can be opened and closed is provided on the front surface of the housing, and a fire extinguisher is housed in the housing, and an antenna is installed on the front surface of the door of the fire extinguisher housing device.

  In this case, the door of the fire extinguisher storage device is provided with a three-dimensional fire extinguisher mark display unit schematically representing the fire extinguisher on the front surface, and the antenna is stored inside the fire extinguisher mark display unit.

(Lighting device)
The equipment is a lighting device installed at a predetermined interval along the side wall on the tunnel ceiling side, and an antenna may be installed on the lighting device installed at every predetermined communicable distance among the plurality of lighting devices. good.

(Emergency phone storage box)
The equipment is an emergency telephone storage box installed at a predetermined interval along the inner wall surface of the tunnel, and an antenna is installed in front of the emergency telephone storage box.

(Shared device)
In addition, as a wireless connection box, a plurality of wireless connection boxes for connecting wireless devices having different assigned frequency bands are provided, and the plurality of wireless connection boxes are connected via a duplexer having a band filter that passes a signal of the assigned frequency band. Connect to the coaxial cable for power supply.

(Basic effect)
According to the tunnel radio communication auxiliary equipment of the present invention, an antenna is installed in a plurality of equipment installed in a tunnel at a predetermined interval, a branching device is provided, and equipment in the tunnel is installed from a radio connection box installed at a tunnel wellhead. A power supply coaxial cable is laid in the other wireless connection box at the tunnel wellhead via the equipment, and the power supply coaxial cable located on both sides is connected to the input terminal and the output terminal of the branching device provided in the equipment and antenna. In place of a leaky coaxial cable, an existing equipment and equipment installed in the tunnel is provided with an antenna and a branching device, and this shaft cable is connected to the radio connection box at the wellhead. This eliminates the need for installation work for the tunnel housing, and allows the existing tunnel to be installed easily and easily without affecting the tunnel housing. Moreover, since it is not necessary to use an expensive leaky coaxial cable, the equipment cost can be reduced.

(Effect of installing an antenna in the fire extinguisher storage device)
In addition, by using an existing fire extinguisher storage device as an equipment for installing an antenna and a branching device, by installing an antenna on the front face of the door of the fire extinguisher storage device, for example, the door of the fire extinguisher storage device has an antenna. The antenna can be installed easily by simply replacing it.

  In addition, the fire extinguisher storage device has a fire extinguisher mark display section schematically representing the fire extinguisher on the door, so that the fire extinguisher mark display section can accommodate an antenna inside. By using the display mark, the antenna is not exposed on the door surface of the fire extinguisher storage device, and the antenna can be provided outside the door without impairing the function of the door of the fire extinguisher storage device.

(Effects when an antenna is provided in the lighting device)
In addition, as equipment for installing antennas and branching units, emergency telephone storage boxes installed at predetermined intervals along the tunnel ceiling side wall are used, and antennas and branching units are installed in emergency telephone storage boxes installed at predetermined intervals. In this case, since the antenna position is higher on the lighting device on the tunnel ceiling surface side, the communication line-of-sight distance can be increased and the antenna can be positioned optimally. .

(Effect of installing an antenna in the emergency telephone storage box)
In addition, as equipment for installing an antenna and a branching device, an emergency telephone storage box installed at a predetermined interval along the tunnel side wall is used, and the antenna and the branching device are installed in the emergency telephone storage box installed every predetermined interval. In this case, installation work for the tunnel housing is not required, and the existing tunnel can be easily and easily installed without affecting the tunnel housing.

(Effect of installing a duplexer)
In addition, as a wireless connection box, a plurality of wireless connection boxes for connecting radio devices having different assigned frequency bands are provided, and a duplexer including a plurality of wireless connection boxes and a band-pass filter that passes a signal of the assigned frequency band is provided. By using a common connection to the power supply coaxial cable, it is possible to use the fire fighting radio and the police radio individually at the same time.

Explanatory drawing which showed embodiment of the tunnel radio | wireless communication auxiliary equipment radio-supplied from a tunnel both sides wellhead Explanatory drawing showing the equipment of B grade tunnel Explanatory drawing showing the front, side, and plane of the fire extinguisher storage device with the antenna installed Explanatory drawing which showed embodiment of the tunnel radio | wireless communication auxiliary equipment radio-supplied from a tunnel one-side wellhead Explanatory drawing which showed embodiment of the tunnel radio | wireless communication auxiliary equipment radio-supplied from a single radio | wireless connection box Explanatory drawing which showed embodiment of the tunnel radio | wireless communication auxiliary equipment which installs an antenna in an illuminating device Explanatory drawing showing a B grade tunnel with an antenna installed in the lighting device Explanatory drawing which showed embodiment of the tunnel radio | wireless communication auxiliary equipment which installs an antenna in an emergency telephone storage box

[Configuration of wireless communication auxiliary equipment]
(Equipment configuration)
FIG. 1 is an explanatory view showing an embodiment of a tunnel wireless communication auxiliary facility that wirelessly supplies from both tunnel wellheads, and FIG. 2 is an explanatory view showing a B grade tunnel facility.

  As shown in FIGS. 1 and 2, the tunnel wireless communication auxiliary equipment of this embodiment is provided with a branching device 16 and an antenna 18 in a fire extinguisher storage device 12 installed along a supervisor passage 15 in the tunnel 10. A power feeding coaxial cable 26 is laid from one of the 10 wellheads to the other wellhead.

  The branching device 16 provided in the fire extinguisher storage device 12 includes an input terminal, an output terminal, and a branching terminal, and connects one feeding coaxial cable 26 located on both sides to the input terminal and the other feeding coaxial cable 26. Connected to the output terminal, the antenna 18 is connected to the branch terminal. The antenna 18 transmits a radio wave and receives a radio wave so as to enable communication with a portable wireless communication device existing in a range of about 25 meters on both sides.

  A fire fighting wireless connection box 20 and a police wireless connection box 22 are installed at the wellheads on both sides of the tunnel 10 via a duplexer 24. The fire fighting radio connection box 20 is provided with a power supply connection terminal inside an openable / closable door, connected to a fire fighting radio using a predetermined fire fighting radio allocated frequency in the 150 MHz band, and a radio carried by fire fighters in the tunnel. Enables conversation communication with a communication device. In the 150 MHz band fire fighting radio, 68 channels are allocated from 148.0100 MHz to 154.3100 MHz with a bandwidth of 1.6 MHz.

  The police radio connection box 22 is provided with a power supply connection terminal inside an openable / closable door, connected to a police radio using a predetermined police radio allocation frequency of 150 MHz band, and a radio carried by a police officer in a tunnel. Enables conversation communication with a communication device.

  The duplexer 24 includes a band-pass filter that passes through the firefighting radio allocation frequency and a band-pass filter that passes through the police radio allocation frequency, and connects the output of one of the two bandpass filters in common to the coaxial cable 26 on the tunnel side. Connected.

  The coaxial cable 26 is laid in the tunnel 10 through a conduit 19 installed in the duct passage 17 below the supervisor passage 15 and is started up at the place where the fire extinguisher storage device 12 is installed. A coaxial cable 26 is connected to the branching device 16 installed in the fire extinguisher storage device 12 through a through hole provided in the fire extinguisher. For this reason, installation of a mounting bracket or the like for laying the coaxial cable 26 in the tunnel 10 is unnecessary, and the tunnel housing is not affected.

  In this way, instead of the leaky coaxial cable, the fire extinguisher storage device 12 installed in the tunnel 10 is provided with the branching device 16 and the antenna 18, and the coaxial cable 26 is used for the fire-fighting wireless connection box 20 and the police wireless connection box. 22 and the duplexer 24 are connected so that the installation work for the tunnel housing is not required, and the existing tunnel can be installed easily and easily without affecting the tunnel housing. Moreover, since it is not necessary to use an expensive leaky coaxial cable, the equipment cost can be reduced.

(Installing the antenna of the fire extinguisher storage device)
FIG. 3 is an explanatory view of a fire extinguisher storage device in which an antenna is installed. FIG. 3 (A) shows the front, FIG. 3 (B) shows the side, and FIG. 3 (C) shows the plane.

  As shown in FIG. 3, the fire extinguisher storage device 12 includes a box-shaped housing 28 opened on the front surface and a fire extinguisher door 30 provided to be openable and closable in the housing opening. Contains a fire extinguisher book.

  The fire extinguisher storage device 12 according to the present embodiment is provided with a three-dimensional fire extinguisher mark 32 schematically representing a fire extinguisher as a fire extinguisher mark display unit provided on the outer surface of the fire extinguisher door 30. The antenna 18 is accommodated.

  The three-dimensional fire extinguisher mark 32 has a three-dimensional shape in which a portion of the fire extinguisher cylinder schematically represented is projected in an arc shape forward, and the antenna 18 is vertically attached and fixed to the door surface relative to the three-dimensional cylinder portion. The antenna 18 is covered with a solid cylinder so that the antenna 18 is not exposed to the outside.

  As described above, the fire extinguisher mark provided on the fire extinguisher door 30 is used as the solid fire extinguisher mark 32 so that the antenna 18 is housed inside. 18 is not exposed, and the antenna 18 can be installed as the fire extinguisher storage device 12 without a sense of incongruity.

  Further, when the antenna 18 is installed inside the three-dimensional fire extinguisher mark 32, the antenna 18 is positioned in front of the conductor plate by the metal fire extinguisher door 30, so that the antenna characteristics are set so that the influence is taken into consideration. Set the gain. In addition, a synthetic resin plate may be provided through the portion of the fire extinguisher door 30 facing the three-dimensional fire extinguisher mark 32 to reduce the influence of the metal plate.

  Further, the material of the three-dimensional fire extinguisher mark 32 and / or the fire extinguisher door 30 may be a synthetic resin or fiber reinforced plastic (FRP) that is less susceptible to variations in antenna gain.

  On the other hand, a branching device 16 is installed in the housing 28 of the fire extinguisher storage device 12, a coaxial cable 26 drawn from the lower side of the housing 28 is connected to the input / output terminal, and a fire extinguisher door is connected to the branching terminal. The antenna 18 provided at 30 is connected by a coaxial cable with a margin that allows the door to be opened and closed.

  In this way, the existing fire extinguisher storage device 12 is used as equipment for installing the branching device 16 and the antenna 18 of the tunnel wireless communication auxiliary equipment, and the antenna 18 is stored inside the three-dimensional fire extinguisher mark 32 of the fire extinguisher door 30. Thus, with respect to the existing fire extinguisher storage device 12, simply replacing the fire extinguisher door with the fire extinguisher door 30 in which the antenna 18 is housed inside the three-dimensional fire extinguisher mark 32 of the present embodiment, the antenna installation work can be easily performed. Can do.

  In addition, the fire extinguisher door 30 of the fire extinguisher storage device 12 may be provided with a three-dimensional fire extinguisher mark 32 schematically representing the fire extinguisher so that the antenna 18 is exposed as viewed from the outside of the fire extinguisher door 30. In addition, the antenna 18 can be provided outside the fire extinguisher door 30 without impairing the door display function of the fire extinguisher storage device 12.

  In addition, as the three-dimensional fire extinguisher mark 32, the part of the fire extinguisher cylinder may have a triangular prism shape, a semi-cylindrical shape, a cube shape, a rectangular parallelepiped shape, and the antenna 18 may be accommodated therein.

(Other embodiment at the time of providing an antenna in a fire extinguisher storage device)
FIG. 4 is an explanatory view showing an embodiment of a tunnel wireless communication auxiliary facility that wirelessly supplies from a tunnel one-side wellhead.

  As shown in FIG. 4, the tunnel radio communication auxiliary equipment of this embodiment is provided with a branching device 16 and an antenna 18 in a fire extinguisher storage device 12 installed in a tunnel 10, and is provided at one wellhead or the other wellhead of the tunnel 10. A power feeding coaxial cable 26 is laid, and one power feeding coaxial cable 26 located on both sides of the branching device 16 is connected to the input terminal, the other power feeding coaxial cable 26 is connected to the output terminal, and the antenna 18 is connected. This is the same as the embodiment of FIG. 1.

  On the other hand, the present embodiment is different in that a fire fighting wireless connection box 20 and a police wireless connection box 22 are installed at one side of the tunnel 10 via a duplexer 24. In this case, a predetermined termination resistor is connected to the output terminal of the branching device 16 which is the termination of the coaxial cable 26.

  This kind of tunnel wireless communication auxiliary equipment that wirelessly supplies from one side of the tunnel, for example, in a one-way-only tunnel on a highway or a motorway, performs fire extinguishing activities and rescue activities from the tunnel entrance side. Even if the wireless connection box 20 for fire fighting and the wireless connection box 22 for police are provided, it is possible to respond appropriately.

  FIG. 5 is an explanatory view showing an embodiment of a tunnel wireless communication auxiliary equipment wirelessly supplied from a single wireless connection box, and FIG. B) shows an embodiment in which wireless supply is performed from a tunnel one-side wellhead.

  As shown in FIG. 5, the tunnel wireless communication facility of this embodiment is provided with a branching device 16 and an antenna 18 in the fire extinguisher storage device 12 installed in the tunnel 10 and sequentially connected by a coaxial cable 26 in FIG. As in the case of the embodiment, only one wireless connection box 25 is provided at the tunnel wellhead. For this reason, the wireless connection box 25 is connected to either a fire fighting radio or a police radio and supplied wirelessly. Will do. This embodiment makes it possible to simplify the equipment configuration on the tunnel wellhead side and reduce the equipment cost.

[Embodiment in which an antenna is provided in a lighting device]
FIG. 6 is an explanatory diagram showing an embodiment of a tunnel wireless communication auxiliary facility in which an antenna is installed in the lighting device, and FIG. 7 is an explanatory diagram showing a class B tunnel in which the antenna is installed in the lighting device.

  As shown in FIGS. 6 and 7, the tunnel wireless communication auxiliary equipment of this embodiment includes a branching device 16 and an antenna 18 in a lighting device 14 installed at a predetermined interval at a position close to the ceiling above the tunnel side wall in the tunnel 10. The feeding coaxial cable 26 is laid toward one or the other wellhead of the tunnel 10, and the feeding coaxial cable 26 located on both sides of the input terminal and the output terminal of the branching device 16 provided in the lighting device 14 is provided. The antenna 18 is connected to the branch terminal. In addition, a fire fighting wireless connection box 20 and a police wireless connection box 22 are installed at the wellheads on both sides of the tunnel 10 via a duplexer 24.

  As shown in FIG. 7, since the installation interval of the illuminating device 14 is, for example, 15 m, which is shorter than the fire extinguisher storage device 12, the branching device 16 and the antenna 18 are installed at intervals of 45 m. Further, the branching device 16 is housed in an empty space in the lighting device 14, while the antenna 18 is installed downward from, for example, the side surface of the housing of the lighting device 14.

  Even in this embodiment, instead of the leaky coaxial cable, the branching device 16 and the antenna 18 are provided in the lighting device 14 installed in the tunnel 10, and the coaxial cable 26 is used for the fire-fighting radio connection box 20 for the wellhead and police. By connecting the wireless connection box 22 and the duplexer 24, the installation work for the tunnel housing is not required, and the existing tunnel can be easily and easily installed without affecting the tunnel housing. . Moreover, since it is not necessary to use an expensive leaky coaxial cable, the equipment cost can be reduced.

  Further, by providing the antenna 18 in the lighting device 14, the position of the antenna 18 becomes a higher position of the lighting device 14 on the tunnel ceiling surface side, the communication line-of-sight distance can be increased, and the antenna installation position is optimal. Is possible.

  In addition, you may apply the point which provided the branching device 16 and the antenna 18 to the illuminating device 14 of FIG. 6 to embodiment of FIG.4 and FIG.5.

[Embodiment in which an antenna is provided in an emergency telephone storage box]
FIG. 8 is an explanatory diagram showing an embodiment of a tunnel radio communication auxiliary facility in which an antenna is installed in an emergency telephone storage box.

  As shown in FIG. 8, the tunnel wireless communication auxiliary equipment of this embodiment is provided with an antenna 18 on the door of an emergency telephone storage box 36 installed at intervals of 200 m on the side wall of the tunnel along the supervisor passage in the tunnel 10 and an apparatus. A branching device 16 is provided, and a coaxial cable 26 for power feeding is laid toward one or the other wellhead of the tunnel 10, and the input terminal and the output terminal of the branching device 16 provided in the emergency telephone storage box 36 are provided on both sides. The feeding coaxial cable 26 is connected, and the antenna 18 is connected to the branch terminal. In addition, a fire fighting wireless connection box 20 and a police wireless connection box 22 are installed at the wellheads on both sides of the tunnel 10 via a duplexer 24.

  As in the case of the fire extinguisher storage device 18, the antenna 18 is installed in the emergency telephone storage box 36 as a three-dimensional emergency display as an emergency telephone mark display portion of an emergency telephone door that can be freely opened and closed in an opening of a housing that stores an emergency telephone. A telephone mark may be provided and the antenna may be housed inside the three-dimensional emergency telephone mark.

  Also, depending on the emergency telephone storage box, an emergency telephone indicator indicating the location of the emergency telephone may be separately installed in the vicinity thereof. Therefore, the antenna 18 and the branching unit are stored in the emergency telephone indicator. May be.

  In addition, you may apply the point which provided the branching device 16 and the antenna 18 in the emergency telephone storage box 36 of FIG. 8 to embodiment of FIG.4 and FIG.5.

[Modification of the present invention]
In the above embodiment, the fire extinguisher storage device and the lighting device are taken as an example of the equipment for installing the branching device and the antenna of the tunnel wireless communication equipment. However, the equipment is provided in other appropriate equipment. Also good.

  Further, the above-described embodiment is an example in which tunnel wireless communication auxiliary equipment is provided in an existing tunnel, but the present invention can be similarly applied to a new tunnel.

  In the above-described embodiment, signals from the radio and / or police radio connection box are combined into a tunnel and supplied to the tunnel. An FM radio rebroadcast device or the like may be connected as necessary.

The present invention includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

10: Tunnel 12: Fire extinguisher storage device 14: Illuminating device 16: Branch device 17: Duct passage 18: Antenna 19: Conduit 20: Wireless connection box for fire fighting 22: Wireless connection box for police 24: Duplexer 25: Wireless connection Box 26: Coaxial cable 28: Housing 30: Fire extinguisher door 32: Solid fire extinguisher mark 36: Emergency telephone storage box

Claims (6)

An antenna that is provided in a plurality of equipment installed in the tunnel at predetermined intervals, and that is connected to a wireless communication device used in the tunnel;
A wireless connection box provided with a connection terminal for connecting a wireless communication device, installed at one or both of the tunnel wellheads,
A coaxial cable for power supply laid in the other wireless connection box of the tunnel wellhead or the other of the tunnel wellhead through the equipment in the tunnel from one wireless connection box of the tunnel wellhead,
A branching unit installed inside the equipment and connected to one input coaxial cable located on both sides to the input terminal and the other feeding coaxial cable to the output terminal, and the antenna connected to the branch terminal; ,
A tunnel radio communication auxiliary facility characterized by comprising:
In the tunnel radio communication auxiliary equipment according to claim 1,
The facility device is a fire extinguisher storage device in which a door that can be opened and closed is provided on the front surface of the housing, and a fire extinguisher is housed in the housing. Wireless communication auxiliary equipment.
The tunnel radio communication auxiliary equipment according to claim 2, wherein the door of the fire extinguisher storage device is:
A tunnel radio communication auxiliary facility characterized in that a three-dimensional fire extinguisher mark display unit schematically representing a fire extinguisher is provided on the front, and an antenna is housed inside the fire extinguisher mark display unit.
In the tunnel radio communication auxiliary equipment according to claim 1,
The equipment is a lighting device installed at predetermined intervals along the side wall on the tunnel ceiling side,
Tunnel wireless communication auxiliary equipment, wherein the antenna is installed in a lighting device installed at every predetermined communicable distance among the plurality of lighting devices.
In the tunnel radio communication auxiliary equipment according to claim 1,
A tunnel radio communication auxiliary facility, wherein the equipment is an emergency telephone storage box installed at a predetermined interval along a tunnel inner wall surface, and an antenna is installed in front of the emergency telephone storage box.
In the tunnel radio communication auxiliary equipment according to claim 1,
As the wireless connection box, a plurality of wireless connection boxes for connecting radio devices having different assigned frequency bands are provided, and a duplexer provided with a band filter for passing the signals of the assigned frequency band through the plurality of wireless connection boxes. A tunnel radio communication auxiliary facility, which is commonly connected to the power supply coaxial cable via the cable.

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