JP4669795B2 - Optical fiber cable laying method - Google Patents

Description

The present invention relates to an optical fiber cable laying method in a unit house configured by combining housing units.

  The so-called unit construction method, in which a plurality of housing units produced in a factory are combined and transported to the construction site of the house to construct a unit house, can be said to be an excellent construction method in terms of shortening the construction period and saving construction costs. As for the housing unit used in this unit construction method, what needs to be installed inside is installed in advance at a factory where the housing unit is produced.

  Electrical wiring to electric lamps, power outlets, and the like is no exception, and power cables and the like are laid in the housing unit in advance at the factory where the housing unit is produced. For this reason, various proposals have been made regarding electrical wiring in such unit houses (see, for example, Patent Document 1).

By the way, as the information communication means in the home, communication by telephone line or wireless is the mainstream, but there is a limit in terms of information transmission capability to cope with the recent increase in capacity and speed of information. On the other hand, information communication using optical fibers has high transmission capability, can handle high-speed communication at the gigabit (Gbps) level, and has less influence on crosstalk and other devices than copper telephone lines. For this reason, it is considered to be an effective communication means for the next generation. According to the information communication using the optical fiber described above, for example, bidirectional communication of moving images, real-time communication over a long distance, and the like are possible, and convenience in information communication is greatly improved.
JP-A-7-31012

  However, in order to carry out information communication using optical fibers in a house, so-called FTTH (Fiber) is used to distribute and construct optical fiber cables drawn from an optical fiber trunk line to ONUs in buildings, information distribution boards, etc. To The Home) is required.

  In this FTTH, when distributing and constructing in a building, at present, optical fiber cables must be wired in a star shape from ONUs, information distribution boards, etc. to multiple optical outlets in each room. There was a lot of work time on site such as assembly of optical outlets, and there were many problems in construction quality.

  In particular, in the unit construction method, as described above, as for the electrical wiring, the installation of the power cable and the like to the power outlet for each unit has been completed at the factory, and field work is reduced as much as possible. However, the current situation is that information wiring using an optical fiber cable or the like is carried out in the field work, as is the case with methods other than the unit method.

  Specifically, for example, in a system of an electrical manufacturer, it is a method in which an information distribution board called a multimedia port is directly wired and connected to an information outlet in each room. Thus, there is a possibility that problems such as miswiring and wiring defects may occur. For this reason, the merit of the unit construction method was not utilized.

Therefore, the present invention has been made to cope with such a situation. In order to take advantage of the unit construction method, the field work of the optical fiber cable is reduced in the unit house where the information communication using the optical fiber is introduced. It is an object of the present invention to provide an optical fiber cable laying method that can be used.

Fiber optic cable laying process of the present invention, the two or more unit housing configured to house unit having a light outlet in a combination of two or more, and relays the fiber optic cable drawn from the outside of the unit housing, the light An optical fiber cable laying method for branch laying in an outlet , wherein a manufacturing factory opens a hole for mounting an optical outlet at a predetermined location on the wall surface of the housing unit, and attaches a branch box to the ceiling of the housing unit; A step of laying the optical fiber cable in the housing unit alongside a power cable laid in a power outlet attached to the housing unit, and connecting one optical connector of the sub optical fiber cable to the branch box, Connect the other optical connector to the optical outlet And connecting the optical outlet connected to the mounting hole provided on the wall surface of the housing unit, and combining the two or more housing units at a construction site. And connecting one optical connector of each of the number of main optical fiber cables corresponding to the number of the housing units to the branch box provided in each housing unit and spanning the housing units. Connecting the other optical connector of each of the plurality of main optical fiber cables to each of a plurality of optical outlets for connecting information distribution boards, and connecting the plurality of optical outlets to one Attaching to the wall surface of each housing unit, attaching the information distribution board in the vicinity of the plurality of optical outlets, The step of connecting the plurality of optical outlets to the information distribution board and the step of drawing the external optical fiber cable connected to the subscriber communication network into the unit housing and connecting to the information distribution board are performed. It is characterized in that.

Further, in the optical fiber cable laying method of the present invention, after the construction is completed, the connection line between the information distribution board and the optical outlet is once disconnected, and an optical power meter is connected to one optical outlet for the information distribution board connection. Then, a terminal connection adapter connected to the optical outlet by inputting light from the optical outlet of the corresponding housing unit using a standard light source and measuring the received light power with the optical power meter. After confirming that the minimum light-receiving sensitivity required for the above-mentioned is satisfied, and confirming the other optical outlet in the same manner, the information distribution board and the optical outlet for connecting the information distribution board are connected. It is characterized by further carrying out an inspection step of reconnecting with a wire.

According to the present invention, in a unit house constituted by combining housing units, the housing unit is provided with a branch box , and the laying of the main optical fiber cable in the unit house is performed mainly from the information distribution board to the branch box . There are two types: laying of the optical fiber cable and laying of the sub optical fiber cable from the branch box to the optical outlet. The branch box and the optical outlet are both provided in the same housing unit. Therefore, the installation of the two optical fiber cables, the main optical fiber cable and the sub optical fiber cable, can be performed separately, and the sub optical fiber cable from the branch box to the optical outlet is installed in the factory that produces the housing unit. Etc. can be performed in advance.

Therefore, for the construction of unit housing, the housing unit where the sub optical fiber cable is laid is transported to the construction site of the unit housing and assembled, and then the main optical fiber cable is laid from the information distribution board to the branch box . What is necessary is just to carry out, and it is possible to reduce the field work of the optical fiber cable and to improve the construction quality of the unit house. In addition, the sub optical fiber cable can be laid at the housing unit production factory, so that construction defects such as miswiring and defective wiring can be easily suppressed.

  In addition, since the laying of the sub optical fiber cable in the housing unit can be performed alongside the power cable laid to the power outlet provided in the housing unit, the laying of the sub optical fiber cable can be easily performed, The construction quality can be improved.

Hereinafter, an optical fiber cable laying system to which an optical fiber cable laying method according to an embodiment of the present invention is applied will be described in detail with reference to the drawings. The optical fiber cable laying system in the present embodiment is used to configure a LAN system in a unit house. FIG. 1 is a perspective view for explaining a unit house adopting the optical fiber cable laying system in the present embodiment, and FIG. 2 is a block diagram of the optical fiber cable laying system in the present embodiment.

  1 and 2, the unit house 1 is configured by joining two rectangular parallelepiped housing units 2 side by side in the left-right direction with the longitudinal direction of these housing units 2 being the left-right direction. A branch box 4 in which an optical star coupler 5 is housed is attached to the ceiling of each residential unit 2, and an optical outlet 6 is attached to the remaining three wall surfaces except the front wall of each residential unit 2. It has been. A sub optical fiber cable 8 is laid between the branch box 4 and each optical outlet 6.

  A power outlet (not shown) is attached adjacent to the side of the optical outlet 6, and a power cable (not shown) is laid from the power distribution board to the power outlet. It is laid alongside the power cable. In addition, two optical outlets 6 for connecting the information distribution board 3 to be described later are attached to the front wall surface of the housing unit 2 on the left side. These optical outlets 6 for connecting the information distribution board 3 and each house. Main optical fiber cables 7 are laid between the optical star couplers 5 housed in the branch box 4 of the unit 2.

An information distribution board 3 is attached below the optical outlet 6 attached to the wall surface in front of the housing unit 2 arranged on the left side. The information distribution board 3 is used for connecting the information distribution board 3. Connected to an optical outlet 6 . Further , an external optical fiber cable 9 is drawn into and connected to the information distribution board 3 from the outside of the unit house 1. In FIG. 2, the description of a part of the optical outlets 6 connected to one of the two branch boxes 4 is omitted.

  The optical fiber cables used for the main optical fiber cable 7 and the sub optical fiber cable 8 are usually two-core optical fiber cables. For example, quartz optical fiber or plastic optical fiber (POF) is used as the material of the optical fiber constituting these cables. However, it is preferable to use a plastic optical fiber in view of bending characteristics at the branching portion.

  This plastic optical fiber has a GI type (refractive index distribution type) or multilayer type cross-sectional structure, and the optical fiber core and clad material is a polymer such as fluorine, acrylic, polycarbonate, norbornene, or cyclic olefin. The one using is used.

  The optical star coupler 5 provided in each of the two housing units 2 includes an input terminal and an output terminal, and these input terminals and output terminals are respectively connected to the optical outlet 6 provided in the housing unit 2. An output terminal, an input terminal, and an E / O unit 15 and an O / E unit 16 (to be described later) of the information distribution board 3 are connected via an optical outlet 6 for connecting the information distribution board 3. Among these, the sub optical fiber cable 8 is used for connection with the output terminal and input terminal of the optical outlet 6, as described above. In addition, as described above, the main power outlet 6 for connecting the information distribution board 3 which is an optical outlet to which the E / O section 15 and the O / E section 16 of the information distribution board 3 are connected is mainly connected as described above. An optical fiber cable 7 is used.

  The optical coupler used for the optical star coupler 5 is a passive type, for example, a mixing rod type or a bundle fiber type. As shown in FIG. 2, the optical star coupler 5 is configured such that all optical fiber cables connected to the optical star coupler 5 are relay-connected to each other, and is housed in a branch box 4 made of vinyl chloride. Yes.

  The optical outlet 6 provided in each of the two housing units 2 is for connecting a terminal such as a personal computer used in the housing unit 2. As the optical outlet 6, for example, an SC connector, an MU connector, an SMI connector, or the like is used. The optical outlet 6 is provided with an input terminal for sending an optical signal to the optical star coupler 5 and an output terminal for extracting an optical signal from the optical star coupler 5.

  The information distribution board 3 provided in the left housing unit 2 of the two housing units 2 is an ONU 10 having a function of connecting to a subscriber communication network using an optical fiber via an external optical fiber cable 9, A router 11 having a route selection function and an adapter unit 12 responsible for the control function of the information distribution board 3 are configured. Two adapter units 12 are built in. Each adapter unit 12 includes a connection interface unit 13, an access control unit 14 for controlling access to the LAN, and an E for converting an electrical signal into an optical signal and outputting the optical signal. The O / E unit 15 and the O / E unit 16 that inputs an optical signal and converts the optical signal into an electrical signal. As a LAN access control method in the access control unit 14, a general protocol method such as CSMA / CD or token link is used.

  When using the above optical fiber cable laying system, as described above, a terminal 18 such as a personal computer is connected to the optical outlet 6 attached to the wall surface of the housing unit 2. Is done through. In addition to the adapter 17 configured alone, there are adapters built into the terminal 18 such as a personal computer. These adapters 17 are configured in the same manner as the adapter unit 12 constituting the information distribution board 3 and have the same functions as the adapter unit 12.

Next, a procedure for constructing the optical fiber cable laying system in the unit house 1 (optical fiber cable laying method) will be described. 3-5 is explanatory drawing explaining this procedure. In FIG. 3, in the production factory of the housing unit 2, a branch for opening the optical outlet 6 is drilled at a predetermined place on the wall surface of the housing unit 2 and the optical star coupler 5 having a four-branch function is accommodated. The box 4 is attached to the ceiling of the housing unit 2. Then, as the auxiliary optical fiber cable 8, three acrylic plastic optical fiber cables (POF) having a two-core structure are prepared, optical connectors are attached to both ends of the POF, and the end surfaces are finished in a mirror shape by a hot plate.

  The three POFs are laid on the housing unit 2 alongside a power cable laid on a power outlet (not shown) attached to the housing unit 2. Then, one optical connector of this POF is connected to the input terminal and output terminal of the optical star coupler 5 in the branch box 4, and the other optical connector is connected to the output terminal and input terminal of the optical outlet 6, The optical outlet 6 is attached to a mounting hole provided on the wall surface of the housing unit 2. In addition, at the factory where the housing unit 2 is manufactured, both ends of the optical fiber coupler 7 that connect the optical star coupler 5 in the branch box 4 and the optical outlet 6 for connecting the information distribution board 3 are processed in advance as optical connectors. Prepare two POFs.

  In FIG. 4, the optical outlet 6 and the branch box 4 in which the optical star coupler 5 is housed are attached as described above, and two unit houses 1 in which the sub optical fiber cable 8 is laid are provided. They are transported to the construction site, and the housing units 2 are arranged side by side in the left-right direction, and the unit housing 1 is constructed. In FIG. 5, two main optical fiber cables 7, one optical connector of which is input to the optical star coupler 5 in the branch box 4 provided in the housing unit 2 arranged on the left side. The terminal and the output terminal are connected to the input terminal and the output terminal of the optical star coupler 5 in the branch box 4 provided in the housing unit 2 arranged on the right side.

  The two main optical fiber cables 7 are laid from the housing unit 2 disposed on the left side and the housing unit 2 disposed on the left side to the housing unit 2 disposed on the right side. At the same time, the other optical connector of the two main optical fiber cables 7 is connected to each of the two optical outlets 6 for connecting the information distribution board 3. Then, the two optical outlets 6 for connecting the information distribution board 3 are both attached to the wall surface in front of the housing unit 2 arranged on the left side.

  Further, the information distribution board 3 is attached below the optical outlet 6 for connecting these two information distribution boards 3. The E / O unit 15 and the O / E unit 16 respectively provided in the two adapter units 12 of the information distribution board 3 and the two optical outlets 6 for connecting the information distribution board 3 are respectively provided. Connecting. Further, the external optical fiber cable 9 connected to the subscriber communication network is drawn into the unit house 1 and connected to the information distribution board 3.

  When the above construction is completed, the connection lines from the E / O unit 15 and the O / E unit 16 of the information distribution board 3 to the optical outlet 6 for connecting the information distribution board 3 are temporarily connected to these optical outlets. Remove from 6. Then, an optical power meter is connected to one optical outlet 6 for connecting the information distribution board 3, and light is incident from the optical outlet 6 of the housing unit 2 on the corresponding side using a standard light source or the like. The light receiving power is measured with a power meter, and it is confirmed that the minimum light receiving sensitivity necessary for the adapter 17 for connecting the terminal 18 such as a personal computer connected to the optical outlet 6 is satisfied. After performing the same for the other side, the connection between the E / O unit 15 and the O / E unit 16 of the information distribution board 3 and the optical outlet 6 for connection of the information distribution board 3 is restored. Complete construction and inspection.

  According to the above optical fiber cable laying system, in the unit house 1 configured by combining the housing units 2, the housing unit 2 is provided with the branch box 4 in which the optical star coupler 5 is housed. The laying of the optical fiber cable from 3 to the optical outlet includes the laying of the main optical fiber cable 7 from the optical outlet 6 for connecting the information distribution board 3 to the branch box 4 and the sub optical fiber cable 8 from the branch box 4 to the optical outlet 6. It can be divided into two types. The branch box 4 and the optical outlet 6 are both provided in the same housing unit 2. Therefore, the two optical fiber cables, the main optical fiber cable 7 and the sub optical fiber cable 8, can be separated, and the optical fiber cable from the branch box 4 to the optical outlet 6 is installed in the housing unit 2. Can be done in advance at a factory that produces

  Therefore, in the construction of the unit house 1, the housing unit 2 in which the sub optical fiber cable 8 is laid is transported to the construction site of the unit house 1 and assembled, and after the assembly is finished, the light for connecting the information distribution board 3 The main optical fiber cable 7 may be laid from the outlet 6 to the branch box 4, so that the field work of the optical fiber cable can be reduced and the construction quality of the unit house 1 can be improved. Moreover, the sub optical fiber cable 8 can be laid at the production factory of the housing unit 2, and construction defects such as erroneous wiring and defective wiring can be easily suppressed.

  Further, since the sub optical fiber cable 8 in the housing unit 2 can be laid along with the power cable laid on the power outlet provided in the housing unit 2, the sub optical fiber cable 8 can be easily laid. In addition, the construction quality can be improved.

  Further, the housing unit 2 is provided with an optical star coupler 5 which is a passive optical star coupler, so that troubles in the housing unit 2 can be suppressed as compared with the case where an active optical coupler is used. The power supply of the optical star coupler 5 can be eliminated, and the cost of the housing unit 2 can be reduced.

It is a perspective view for explanation of a unit house which adopted an optical fiber cable laying system in this embodiment. It is a block diagram of the optical fiber cable laying system in this Embodiment. It is explanatory drawing (the 1) of the procedure which builds the optical fiber cable laying system in this Embodiment in a unit house. It is explanatory drawing (the 2) of the procedure which builds the optical fiber cable laying system in this Embodiment in a unit house. It is explanatory drawing (the 3) of the procedure which builds the optical fiber cable laying system in this Embodiment in a unit house.

Explanation of symbols

1 Unit Housing 2 Housing Unit 3 Information Distribution Board 4 Branch Box 5 Optical Star Coupler 6 Optical Outlet 7 Main Optical Fiber Cable 8 Sub Optical Fiber Cable 9 External Optical Fiber Cable 10 ONU
DESCRIPTION OF SYMBOLS 11 Router 12 Adapter part 13 Interface part 14 Access control part 15 E / O part 16 O / E part 17 Adapter 18 Terminal device

Claims (2)

In the residential units in combination two or more configured unit housing having two or more light outlets, relays the fiber optic cable drawn from the outside of the unit housing, the optical fiber cable laying method branches laid on the light outlet Because
In the production factory
Opening a mounting hole for an optical outlet at a predetermined location on the wall surface of the housing unit, and attaching a branch box to the ceiling of the housing unit;
Laying the sub optical fiber cable in the housing unit alongside the power cable laid in a power outlet attached to the housing unit;
Connecting one optical connector of the sub optical fiber cable to the branch box, and connecting the other optical connector to the optical outlet;
Mounting the connected optical outlet in the mounting hole provided on the wall surface of the housing unit; and
At the construction site
Combining the two or more housing units to assemble a unit housing;
Connecting one optical connector of each of the number of main optical fiber cables corresponding to the number of the housing units to the branch box provided in each housing unit, and spanning and laying over each housing unit; ,
Connecting the other optical connector of each of the plurality of main optical fiber cables to each of a plurality of optical outlets for connecting information distribution boards;
Attaching the plurality of optical outlets to the wall surface of one residential unit;
Attaching an information distribution board in the vicinity of the plurality of optical outlets;
Connecting the plurality of optical outlets to the information distribution board;
A step of drawing an external optical fiber cable connected to a subscriber communication network into the unit house and connecting it to the information distribution board. The optical fiber cable laying method according to claim 1,
After completion of the construction, once disconnect the connection line between the information distribution board and the optical outlet, connect an optical power meter to one optical outlet for connecting the information distribution board, and the optical outlet of the corresponding housing unit In order to satisfy the minimum light receiving sensitivity required for the adapter for terminal connection connected to the optical outlet by measuring the light receiving power with the optical power meter by entering light using a standard light source, etc. In addition, after confirming the same for the other optical outlet, an inspection process for reconnecting the information distribution board and the optical outlet for connecting the information distribution board with the connection line is further performed. An optical fiber cable laying method characterized by:

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