JP2009128711A - Optical fiber cable and information wiring system - Google Patents

Abstract

An object of the present invention is to make it possible to easily carry out optical fiber cable wiring with high density by using a slot rod to increase the number of cores of a cable and using a cable jacket having a low dynamic friction coefficient. It is to provide an optical fiber cable.
The present invention relates to a slot rod 12 made of a resin provided so that a plurality of slots 13 are arranged around a tension member 11, optical fiber core wires 14 accommodated in the respective slots 13, A cable jacket 15 having a low dynamic friction coefficient provided on the outer periphery of the slot rod 12 is provided.
[Selection] Figure 3

Description

  The present invention relates to an optical fiber cable and an information wiring system used for wiring for information communication using an optical fiber in a building composed of a plurality of floors such as an office building and an apartment building.

  Conventionally, for information communication within office buildings and condominium buildings, media converters have been used for the main distribution boards and intermediate distribution boards in office buildings and condominium buildings for information communication using optical fibers wired from a telephone station or other containment station. Then, VDSL (Very high-bit-) which converts the optical signal into an electric signal and communicates information to each subscriber room using a metallic line already wired in the office building or condominium building. rate Digital Subscriber Line) format (see, for example, Non-Patent Document 1) has been widely used. However, in recent years, in response to the rise of an advanced information society, media for information communication in office buildings and apartment buildings Rather than using a converter and metallic wire together, It is beginning to be implemented to interconnect the Le directly.

  Especially for vertical wiring in office buildings and condominium buildings, in order to directly route optical fiber cables, SM (Single Mode Fiber) type indoor optical fiber cables (for example, see Patent Document 1) and the like. An SM (Single Mode Fiber) type indoor optical cable (see, for example, Patent Document 2) is currently used.

Japanese Utility Model Publication No. 5-30817 JP 2003-161867 A JP 2007-121398 A JP-A-8-184728 JP-A-6-148464 [New edition] “Easy optical fiber communication” published by Ohmsha, November 1, 2006 p. 242-243

  At present, vertical pipes used for optical fiber cable wiring in office buildings and condominium buildings have various inner diameters. Small pipes with a diameter of 14 mm exist, and pipes with a large diameter of 50 mm. However, since electric cables, metallic cables, and coaxial cables are already wired in the pipe, the excess space in the pipe is always narrow and the restrictions on the wiring of the optical fiber cable in the vertical pipe are large.

  In addition, office buildings and condominium buildings have various shapes, and vertical piping is installed, so that the piping itself may be meandered and installed in office buildings and condominium buildings. Therefore, for example, in the SM type optical fiber cable, the slot rod and the tension member are hard and their diameter is large (for example, the tension member of the SM type optical fiber cable is 1.4 to 2.8 mm, the SM type indoor The tension member of the optical cable is 0.4mm, but there are two on the both ends of the indoor optical cable, and it is difficult to bend in all directions. There is a problem that sometimes it does not pass through the piping due to excessive space or meandering in the piping.

  On the other hand, the SM type indoor optical cable has an outer diameter as small as 2 × 3.7 mm compared to the SM type optical fiber cable, so that there is a surplus space due to the vertical pipe diameter and already wired cables. This problem is less than that of SM type optical fiber cables, but because of its rectangular cross-section, twisting may occur when wiring in the pipe, which may break the optical fiber inside the optical fiber cable. Care must be taken in wiring the piping.

  For this reason, in the currently used optical fiber cable, a specific technique such as certain experience and knowledge is required for the wiring work in the vertical piping.

  In these existing optical fiber cables, the outer cover of the optical fiber cable is removed from the main switchboard in the office building or condominium building and the intermediate switchboard on each floor, and the optical fiber is taken out from the inside. In the main switchboards of office buildings and condominium buildings and intermediate switchboards on each floor for extra length processing of optical fiber wires taken out from optical fiber cables, mechanical splices, connectors, and fusion splicing for branching and splitter connections Install the cabinet. The optical fiber taken out from the optical fiber cable is stored in the cabinet, and the horizontal piping from the main switchboard in the office building or condominium building and the intermediate switchboard on each floor to the subscriber room is used for information communication to the subscriber room on each floor. Since it is necessary to connect the optical fiber cable routed through through a mechanical splice, an optical connector, or a fusion splicing, a specific technique such as a certain experience and knowledge is necessary for these connection operations.

  For this reason, in the work of wiring optical fiber cables in office buildings and condominium buildings, only workers having these specific technologies can be carried out, and there is a problem that a lot of work time is required even when carried out. I have it.

  In addition to this, the existing two optical fiber cables are used in combination with or constructed according to the office building or condominium building, so the wiring means for information communication in the office building or condominium building premises is constant. However, there is a problem that a technology corresponding to that is required and depends on a worker having a specific technology, which hinders construction of an information wiring system for an advanced information society.

  The present invention has been made in view of the above circumstances. By using a slot rod to increase the number of cores of the cable and using a cable jacket having a low dynamic friction coefficient, the optical fiber cable can be easily wired at a high density. Further, it is an object of the present invention to provide an optical fiber cable and an information wiring system that can improve the workability of wiring work by using an optical fiber cable with a connector.

  In order to achieve the above object, an optical fiber cable according to the present invention includes a slot rod made of a resin provided so that a plurality of slots are arranged around a tension member, and an optical fiber core wire accommodated in each slot. And a cable jacket having a low dynamic friction coefficient provided on the outer periphery of the slot rod.

  According to the present invention, in the optical fiber cable, a cable jacket made of a fluororesin is used as the cable jacket.

  According to the present invention, in the optical fiber cable, a cable jacket having a concavo-convex shape on a surface thereof is used as the cable jacket.

  According to the present invention, in the optical fiber cable, a slot rod having a plurality of groove-shaped slots arranged on the outer periphery is used as the slot rod.

  In the optical fiber cable, the present invention is characterized in that a slot rod in which a slot composed of a plurality of through holes is arranged is used as the slot rod.

  According to the present invention, in the optical fiber cable, an optical fiber core having a holey fiber structure in which holes are provided around a core is used as the optical fiber core.

  According to the present invention, in the optical fiber cable, optical connectors are provided at both ends of the optical fiber core wire.

  In the optical fiber cable, the present invention is characterized in that a multi-core optical connector is used as at least one of the optical connectors.

  The information wiring system according to the present invention is characterized in that the optical fiber cable is used for wiring to a main switchboard or an intermediate switchboard on each floor through a vertical pipe of a building composed of a plurality of floors.

  In the information wiring system, the optical connector on the splitter module side or the optical connector on the cabinet side installed in the main switchboard and the intermediate switchboard on each floor and the optical connector of the optical fiber cable are connected via an adapter. It is characterized by that.

  The optical fiber cable and the information wiring system according to the present invention perform multi-core cable using a slot rod, and easily carry out optical fiber cable wiring at high density by using a cable jacket having a low dynamic friction coefficient. In addition, it becomes possible to obtain a cable having a strong resistance against lateral pressure by using a slot rod, and further, by using an optical fiber cable with a connector, the workability of wiring work can be improved. It becomes possible. In addition, it is possible to work without using specific technology for wiring of optical fiber cables in vertical piping in multi-storey buildings and connection work on main switchboards and intermediate switchboards on each floor. Workers other than those who have the above technique can also work, and as a result, the work time for constructing an information system using optical fiber cables in a multi-storey building can be shortened.

  In addition, the construction of the information wiring system is fixed to a certain means in the multi-storey building, and the construction of the information system using the optical fiber cable in the multi-floor building becomes easy.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a configuration explanatory view showing an optical fiber cable according to an embodiment of the present invention. As shown in FIG. 1, a multi-core optical connector 2 is provided at one end of an optical fiber cable 1, and at the other end of the optical fiber cable 1, each of a plurality of cord portions 4 branched by a branch portion 3 A single-core optical connector 5 is provided. The multi-core optical connector 2 and the single-core optical connector 5 are connected to both ends of a plurality of optical fiber strands passed through the optical fiber cable 1 and the cord portion 4. In this case, the branching unit 3 and the code unit 4 may not be used or may be used only if the functions of the embodiment of the present invention are not impaired.

  FIG. 2 is a configuration explanatory view showing an optical fiber cable according to another embodiment of the present invention. As shown in FIG. 2, multi-core optical connectors 2 and 2 are respectively provided at both ends of the optical fiber cable 1, and the multi-core optical connectors 2 and 2 are a plurality of optical fiber elements that are passed through the optical fiber cable 1. Connected to both ends of the line.

  Alternatively, single-core optical connectors 5 and 5 may be provided at both ends of the optical fiber cable 1 so as to be connected to both ends of a plurality of optical fiber strands passed through the optical fiber cable 1.

  3A to 3C are cross-sectional views showing an example of an optical fiber cable according to an embodiment of the present invention. As shown in FIG. 3A, a slot rod 12 made of a resin, for example, a soft silicon resin is provided around the tension member 11 so that the tension member 11 is a central axis. On the outer periphery of the slot rod 12, a plurality of groove-like slots 13 are provided in a spiral shape at substantially equal intervals. Each slot 13 accommodates a single-core optical fiber 14. The outer periphery of the slot rod 12 is covered with a cable jacket 15 made of a material having a low coefficient of dynamic friction so as to cover the opening of each slot 13. Examples of the material having a low coefficient of dynamic friction include Teflon (registered trademark) PTFE, fluorine-based PTE (thermoplastic elastomer) or carbon, which is a kind of fluororesin, and a soft resin such as silicon resin such as silicon resin. One type is silicone rubber.

  The slot rod 12 includes eight slots 13, each slot 13 having a substantially square shape with a side of 0.3 mm, and only the portion of the slot 13 corresponding to the outer peripheral surface of the slot rod 12 is the outer periphery of the slot rod 12. It is fan-shaped to match the arc of the surface.

  FIG. 4 is a sectional view showing another example of the optical fiber cable according to the embodiment of the present invention. As shown in FIG. 4, a slot rod 16 made of a resin, for example, a soft silicon resin, is provided around the tension member 11 with the tension member 11 as a central axis. Inside the slot rod 16, slots 17 made of a plurality of through holes are provided in a spiral shape around the tension member 11 at substantially equal intervals. Each slot 17 accommodates a single-core optical fiber 14. The outer periphery of the slot rod 16 is covered with a cable jacket 15 made of a material having a low dynamic friction coefficient. In this case, the cable jacket 15 may not be covered by the slot rod 16.

  The slots 13 and 17 do not have to be spiral as long as the functions are satisfied.

  As the tension member 11, for example, one or more steel wires having a diameter of 0.4 mm are provided.

  Furthermore, there is a fluororesin as a substance having a low dynamic friction coefficient.

  The slot rods 12 and 16 are made of soft silicon resin and can be bent flexibly because they have a small diameter, and since they are cylindrical, no twist is generated when wiring the pipe. .

  Therefore, compared with the existing optical fiber cable, it is possible to easily perform wiring with respect to the shape of the vertical piping such as meandering.

  Further, by using an optical fiber core wire having a holey fiber structure having a diameter of 0.25 mm provided with holes around the core as the optical fiber core wire 14, an increase in loss occurs when the optical fiber cable 1 is bent. Since it does not generate | occur | produce, the handling of the optical fiber cable 1 becomes easy.

  Further, a steel wire having a diameter of 0.4 mm is provided as a tension member 11 at the center of the slot rod 12, and the diameter of the slot rod 12 is 1.6 mm.

  The cable jacket 15 uses a fluororesin having a coating thickness of 0.2 mm. For example, PTFE made of Teflon (registered trademark) has a coefficient of dynamic friction of 0.04. For example, the cable jacket 15 is used for a jacket of an existing optical cable. Since it is sufficiently small compared to PVC (polyvinyl chloride, dynamic friction coefficient: 0.40), high density polyethylene (dynamic friction coefficient: 0.11), and low density polyethylene (dynamic friction coefficient: 0.33), The dynamic frictional force with the inner wall of the vertical piping of a multi-storey building and other cables wired in the piping is reduced.

  In addition, since the optical fiber cores 14 are not brought into contact with each other by providing the slot rods 12 and 16, damage or temperature change due to contact between the optical fiber cores even when wiring the optical fiber cable to the vertical piping. It is also possible to prevent damage due to contact due to.

Further, as shown in FIG. 3B, the slot 13 provided in the slot rod 12 has a bullet (bullet) cross section so that the slots 13 do not interfere with each other. A wide space can be secured.
At this time, for example, as shown in FIG. 3C, if the dimension A is 0.3 mm, the dimension C is 0.3 mm, and the tip of the bullet-shaped slot 13 is a semicircle having a radius of 0.3 mm, this bullet-shaped The slot 13 can accommodate two optical fiber core wires 14 having a diameter of 0.25 mm.

  FIG. 5 is a configuration explanatory view showing a cable jacket according to the embodiment of the present invention. As shown in FIG. 5, as a method of reducing the dynamic friction force of the cable jacket 15, by providing an elliptical uneven portion 19 on the surface of the cable jacket 15, the installation area with respect to the inner wall of the pipe is reduced. It is possible to reduce the force.

  Note that the cable jacket 15 may use either a fluororesin alone or a method of only providing an uneven shape portion, or a combination thereof.

  In this way, by reducing the dynamic frictional force of the cable jacket 15, wiring of the optical fiber cable 1 to the vertical piping of a multi-storey building becomes easy. In addition, since the optical fiber cable 1 can be made of a flexible resin including the slot rods 12 and 16, it can be easily wired with respect to the shape of the vertical piping of a multi-storey building such as meandering as compared with the existing optical fiber cable. Is possible.

  As described above, since the optical fiber cable 1 uses the soft resin for both the slot rods 12 and 16 and the cable jacket 15, the cable jacket 15 is flexible and uses a resin having a low dynamic friction coefficient. Therefore, since the frictional force with the inner wall of the pipe and other cables is reduced, the optical fiber cable 1 can be easily wired. In addition, since the optical fiber cable 1 has optical connectors at both ends, the connection work in the main switchboard and the intermediate switchboard on each floor can be eliminated, so that the work becomes easy.

Since optical connectors are provided at both ends of the optical fiber cable 1, the size of the optical connector becomes a problem when wiring in the pipe. This problem can be solved by using the multi-core optical connector 2 according to the piping.
Since the optical fiber cable according to the embodiment of the present invention can be reduced in diameter, the number of optical fiber cables, for example, multi-core light, is about three times that of a conventional optical cable, for example, an indoor cable (2 × 3.7 mm), in the same pipe. In the case of an optical fiber cable with an optical connector provided with an MPO connector (5.5 × 9 × 10 mm) as a connector, the optical connector portion is about twice as thick because it is thick, but in this case, an optical fiber with an optical connector is used. By using the cable, it is not necessary to assemble an optical connector in the field, and workability is improved.
FIG. 10 is an explanatory diagram comparing the optical fiber cable according to the embodiment of the present invention with a conventional optical cable, and is experimental data when two types of optical fiber cables are routed one by one through a 16 cm diameter CD tube. .

  FIG. 6 is an explanatory diagram showing the configuration of the information wiring system according to the first embodiment of the present invention. As shown in FIG. 6, in a building 21 on the fourth floor, a main switchboard (MDF) 22 is installed on the first floor, and an intermediate switchboard (IDF) 23 is installed on each of the second, third, and fourth floors. . Between the main switchboard 22 and the intermediate switchboard 23 on the second floor, between the intermediate switchboard 23 on the second floor and the intermediate switchboard 23 on the third floor, between the intermediate switchboard 23 on the third floor and the intermediate switchboard 23 on the fourth floor. Vertical piping 24 is provided for each, and horizontal piping 25 is provided for the main distribution board 22 and the intermediate distribution board 23 on each floor. A splitter module 26 is provided in the intermediate switchboard 23 on each floor. A horizontal wiring optical fiber cable 27 is passed through the horizontal piping 25, and a single-core optical connector 28 is provided at the end of the horizontal wiring optical fiber cable 27 on the side of the intermediate distribution board 23 via a splitter module 26. It is done.

  An optical fiber cable 1 is inserted into the vertical piping 24 from the intermediate distribution board 23 on the fourth floor to the main distribution board 22 on the first floor from the multi-core optical connector 2, and the branch part 3 and the single-core optical connector 5 are connected to the intermediate distribution board on the fourth floor. 23 left. In the intermediate distribution board 23 on the fourth floor, the single-core optical connector 5 is connected by being inserted into each other via the single-core optical connector 28 and the adapter 29.

  In this way, the optical fiber cable 1 of the vertical wiring can be connected to the horizontal wiring optical fiber cable 27.

  Compared to the conventional wiring system, this eliminates the need for connection processing at the intermediate switchboard 23 and allows the optical fiber cable 1 to be wired to the vertical piping 24 and constructed only by easy optical connector connection. Select the optical fiber cable according to the pipe, branch the optical fiber with an intermediate switchboard on each floor, remove the sheath of the optical fiber with a cabinet, splitter module, etc. It is not necessary to perform connection processing that requires a certain experience or technology such as wearing.

  Therefore, since the construction means of the information wiring system is constant and easy, it is possible to construct the information wiring system by a person other than an operator having a certain technique.

  FIG. 7 is an explanatory diagram showing a configuration of an information wiring system according to the second embodiment of the present invention. In FIG. 7, the same parts as those in FIG. FIG. 7 shows a case where the main switchboard 22 is provided with a splitter module 26 and the intermediate switchboard 23 on each floor is not provided with a splitter module. A single-core light is provided at the end of the horizontal distribution optical fiber cable 27 on the cabinet side of the intermediate switchboard 23. A connector 28 is provided.

  In the intermediate distribution board 23 on the fourth floor, the single-core optical connector 5 is connected by being inserted into each other via the single-core optical connector 28 and the adapter 29.

  In this way, the optical fiber cable 1 of the vertical wiring can be connected to the horizontal wiring optical fiber cable 27.

  In FIG. 7, the multi-core optical connector 2 is connected to the single-core optical connector 32 on the splitter module 26 side via the multi-core / single-core conversion adapter 31 and the adapter 29 in the main switchboard 22 on the first floor.

  FIG. 8 is an explanatory diagram showing a configuration of an information wiring system according to the third embodiment of the present invention. In FIG. 8, the same parts as those in FIG. FIG. 8 shows a case where the main switchboard 22 and the intermediate switchboard 23 on each floor are not provided with a splitter module, and a single-core optical connector 28 is provided at the end of the horizontal distribution optical fiber cable 27 on the cabinet side.

  In the intermediate distribution board 23 on the fourth floor, the single-core optical connector 5 is connected by being inserted into each other via the single-core optical connector 28 and the adapter 29.

  In this way, the optical fiber cable 1 of the vertical wiring can be connected to the horizontal wiring optical fiber cable 27.

  In FIG. 8, in the main switchboard 22 on the first floor, the multi-core optical connector 2 is connected to the pigtail cord 30 side via the multi-core / single-core conversion adapter 31 and the adapter 29 without using a splitter module such as a dedicated line or dark fiber. The single-core optical connector 32 is connected.

  FIG. 9 is an explanatory diagram showing a configuration of an information wiring system according to the fourth embodiment of the present invention. In FIG. 9, the same parts as those in FIG. FIG. 9 shows a case in which a splitter module is provided in the main switchboard 22 and the intermediate switchboard 23 on each floor. A single-core optical connector 28 is connected to the end of the horizontal wiring optical fiber cable 27 on the intermediate switchboard 23 side via the splitter module 26. Is provided.

  In the intermediate distribution board 23 on the fourth floor, the single-core optical connector 5 is connected by being inserted into each other via the single-core optical connector 28 and the adapter 29.

  In this way, the optical fiber cable 1 of the vertical wiring can be connected to the horizontal wiring optical fiber cable 27.

  In FIG. 9, the multi-core optical connector 2 is connected to the splitter module 26 in the main switchboard 22 on the first floor.

  As described above, according to the present embodiment, the friction of the cable jacket surface is obtained by using a fluororesin for the cable jacket or by providing the cable jacket with an uneven shape to reduce the installation area with the inner wall of the pipe. It is possible to reduce the coefficient, and when wiring over other existing cables, it is possible to reduce the dynamic friction force against the cable covering of these cables and the inner wall of the vertical piping, so extra space Even when other cables are already wired in the pipe, the resistance force due to the dynamic friction force can be reduced, so that the tensile force is reduced, and the optical fiber cable can be easily wired in the pipe.

  In addition, this embodiment uses a thin tension member, the optical fiber core wire provided in the slot rod is a single core, and the optical fiber core wire provided in the conventional slot rod has a tape shape. Compared to rods, the cable diameter can be reduced, and the cable jacket is also made of a thin and durable material. By using these slot rods and cable jackets, the cable outer diameter can be reduced. Compared to conventional optical cables, it becomes easier to wire a large number of pipes in a vertical pipe in a building or to superimpose cables on cables already routed in the pipe.

  On the other hand, since this embodiment is provided with optical connectors at both ends, a splitter module that can easily connect the optical connectors provided in the main switchboards of office buildings and condominium buildings and the intermediate switchboards of each floor Since it is only inserted into an adapter or the like of the optical connector, the connection work can be simplified.

  Also from these points, by using this embodiment, it is possible to wire an optical fiber cable to the premises of an office building or an apartment building without using a specific technology. Workers other than the worker can wire the fiber optic cable to the premises of office buildings and condominium buildings, and the work becomes easy, so the work time is shortened compared to the conventional fiber optic cable wiring work. It is also possible to do.

  In addition, by using this embodiment, the construction of an information wiring system becomes a constant means in any office building or condominium building, and the work becomes easy. An information wiring system using a fiber cable can be easily constructed.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

It is composition explanatory drawing which shows the optical fiber cable which concerns on one Embodiment of this invention. It is composition explanatory drawing which shows the optical fiber cable which concerns on other embodiment of this invention. It is sectional drawing which shows an example of the optical fiber cable which concerns on embodiment of this invention. It is sectional drawing which shows the other example of the optical fiber cable which concerns on embodiment of this invention. It is composition explanatory drawing which shows the cable jacket which concerns on embodiment of this invention. 1 is a configuration explanatory diagram showing an information wiring system according to a first embodiment of the present invention. It is composition explanatory drawing which shows the information wiring system which concerns on the 2nd Embodiment of this invention. It is composition explanatory drawing which shows the information wiring system which concerns on the 3rd Embodiment of this invention. It is a structure explanatory view showing an information wiring system concerning a 4th embodiment of the present invention. It is explanatory drawing which compared the optical fiber cable which concerns on embodiment of this invention with the conventional optical cable.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Optical fiber cable, 2 ... Multi-core optical connector, 3 ... Branch part, 4 ... Cord part, 5 ... Single core optical connector, 11 ... Tension member, 12 ... Slot rod, 13 ... Slot, 14 ... Single core light Fiber core, 15 ... Cable jacket, 16 ... Slot rod, 17 ... Slot, 19 ... Uneven shape, 21 ... Building, 22 ... Main switchboard, 23 ... Intermediate switchboard, 24 ... Vertical piping, 25 ... Horizontal piping , 26 ... splitter module, 27 ... horizontal wiring optical fiber cable, 28 ... single-core optical connector, 29 ... adapter, 30 ... pigtail cord, 31 ... multi-core / single-core conversion adapter, 32 ... single-core optical connector.

Claims (10)

A slot rod made of resin provided so that a plurality of slots are arranged around the tension member;
An optical fiber core housed in each slot;
An optical fiber cable comprising a cable jacket having a low coefficient of dynamic friction provided on an outer periphery of the slot rod.   The optical fiber cable according to claim 1, wherein a cable jacket made of a fluororesin is used as the cable jacket.   The optical fiber cable according to claim 1 or 2, wherein a cable jacket having a concavo-convex shape on a surface thereof is used as the cable jacket.   4. The optical fiber cable according to claim 1, 2 or 3, wherein a slot rod having a plurality of groove-like slots arranged on the outer periphery is used as the slot rod.   4. The optical fiber cable according to claim 1, 2, or 3, wherein a slot rod in which slots made of a plurality of through holes are arranged is used as the slot rod.   6. The optical fiber cable according to claim 1, wherein an optical fiber cable having a holey fiber structure in which holes are provided around the core is used as the optical fiber cable.   The optical fiber cable according to any one of claims 1 to 6, wherein optical connectors are provided at both ends of the optical fiber core wire.   The optical fiber cable according to claim 7, wherein a multi-core optical connector is used as at least one of the optical connectors.   An information wiring system using the optical fiber cable according to any one of claims 1 to 8, and wiring to a main switchboard and an intermediate switchboard on each floor through a vertical pipe of a building composed of a plurality of floors.   The optical connector on the splitter module side or the optical connector on the cabinet side, which is installed in the main switchboard and the intermediate switchboard on each floor, and the optical connector of the optical fiber cable are connected via an adapter. Information wiring system.

Images