JP2009211017A - Optical fiber cable and information wiring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical fiber cable that can decrease the diameter of a tension member, can facilitate wiring of an optical fiber cable in a place without surplus space, and can improve work efficiency of wiring work. <P>SOLUTION: In the optical fiber cable, a cylindrical tension member 7 is housed in a cable. The tension member 7 is shaped like a propeller by spirally forming a plurality of grooves along the longitudinal peripheral surface. The space between fins 7A forming the groove functions as a tension member space 12 housing an optical fiber strand 6 of a holey fiber structure. In the optical fiber cable housing the tension member 7, a number of optical fiber strands 6 are each spirally disposed along the grooves of the tension member spaces 12, and the periphery thereof is coated with a cable covering 8 made of material having a low dynamic friction coefficient. <P>COPYRIGHT: (C)2009,JPO&INPIT

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 including a plurality of floors such as an office building and an apartment building.

  Conventionally, a VDSL (Very High-bit-rate Digital Subscriber Line) format has been widely used for information communication within buildings and condominiums. In this VDSL format, media converters are placed in the main switchboards and intermediate switchboards in office buildings and condominium buildings, and these media converters convert information communication optical signals from optical fibers wired from telephone companies and other accommodation stations into electrical signals. The electric signal is communicated to each subscriber's house using a metallic line already wired in the building or apartment building.

  In recent years, with the rise of an advanced information society, instead of using a media converter and a metallic line in combination for information communication within a building or a condominium, direct wiring of an optical fiber cable has begun to be implemented. Especially for vertical wiring in office buildings and condominium buildings, SM (Single Mode Fiber) type in-house optical fiber cables (for example, refer to Patent Document 1) and SM are mainly used for direct wiring of optical fiber cables. A (Single Mode Fiber) type indoor optical cable (for example, see Patent Document 2) is currently used.

Japanese Utility Model Publication No. 5-30817

JP 2003-161867 A

JP-A-8-184728

JP-A-6-148464

JP 2007-121398 A

  Now, vertical pipes used for wiring optical fiber cables in office buildings and condominium buildings have various inner diameters. Small ones have a diameter of 14 mm, and even if the pipe has a large diameter of 50 mm, the electrical space, metallic cable, and coaxial cable are already wired in the pipe, so the excess space in the pipe is always narrow. The restriction of the optical fiber cable wiring in the vertical piping is large.

  In addition, office buildings and apartment buildings have various shapes, and vertical piping is installed, so that the piping itself may be meandered and installed on the premises. On the other hand, in the SM type optical fiber cable, the slot rod and the tension member are hard, the diameter of the tension member is large (1.4 to 2.8 mm), and it is difficult to bend in all directions. On the other hand, although the tension member of the SM type indoor optical cable has a relatively small diameter (about 0.4 mm), there are two tension members at both ends of the cable, and it is still difficult to bend in all directions.

  In addition, the SM type optical fiber cable has a cable outer diameter of 10 mm or more, which is larger than the diameter of the vertical piping, so it lacks flexibility, and due to excess space and meandering in the piping during wiring, There are problems such as being unable to pass through. On the other hand, the SM type indoor optical cable has an outer diameter of 2 × 3.7 mm, which is smaller than that of the SM type optical fiber cable, so there is a surplus due to the vertical pipe diameter and cables already wired. Space issues are reduced compared to SM-type fiber optic cables. However, since the cross section is rectangular, twisting is likely to occur when wiring in the pipe, and there is a risk of breaking the optical fiber inside the cable, so care must be taken in wiring the pipe. Therefore, in the currently used optical fiber cable, a specific technique such as certain experience and knowledge is required for wiring work in the vertical piping.

  In addition, when connecting existing optical fiber cables as described above to the main switchboards in buildings or condominiums and to the intermediate switchboards on each floor, the outer cover of the optical fiber cable is removed and the optical fiber strands taken out from the inside are removed. Extra length processing, branching, mechanical splice for splitter connection, and fusion splicing work with optical connector are performed. In order to protect such a connection part, the cabinet for accommodating a connection part is normally installed in the inside of the main switchboard of a building or a condominium, and the intermediate switchboard of each floor. At this time, in order to store the optical fiber taken out from the optical fiber cable in the cabinet and to communicate information to the subscriber's house on each floor, the horizontal system from the main switchboard of the building or condominium or the intermediate switchboard on each floor to the subscriber's house It is necessary to fuse and connect an optical fiber cable wired through this pipe to a mechanical splice or an optical connector. For this reason, specific techniques such as certain experience and knowledge are necessary for these connection operations.

From the above, in the work of laying optical fiber cables in office buildings and condominium buildings, only workers with these specific technologies can be implemented, and even when implemented, a lot of work time is required. Have problems.
In addition, the existing two optical fiber cables are used in combination with or constructed according to buildings and condominiums, but the wiring means for information communication in buildings and condominiums is not constant. Therefore, a corresponding technology is required. As described above, there is a problem that depends on an operator having a specific technique and hinders construction of an information wiring system for an advanced information society.

  The present invention has been made in view of the above circumstances, and it is possible to reduce the diameter of the tension member and to easily perform the wiring of the optical fiber cable in a place where there is no excess space. An object of the present invention is to provide an optical fiber cable and an information wiring system that can improve the workability of the system.

In order to achieve the above object, the optical fiber cable of the present invention has the following characteristic configuration.
(1) A columnar tension member formed with a groove or space in the longitudinal direction, an optical fiber strand disposed in the groove or space of the tension member, and a coating around the optical fiber strand and the tension member And a cable jacket.

(2) In (1), a spacer using at least one of fluororesin, silicon resin, and urethane resin is provided so as to embed a groove or space of the tension member.
(3) In (1) or (2), the tension member has a rectangular or propeller cross section.

(4) In any one of (1) to (3), the cable jacket has an uneven surface.
(5) In any one of (1) to (4), the tension member is formed by periodically forming notches along the circumferential surface longitudinal direction.

(6) In any one of (1) to (5), the tension member is covered with a fluororesin, a silicon resin, a urethane resin, or an ultraviolet curable resin.
(7) In any one of (1) to (6), the tension member is formed by combining individual parts of a square, a rectangle, a circle, or a cloud, and bonding them together, bringing them together, or covering them. It is characterized by being.

(8) In any one of (1) to (7), an optical connector in which the optical fiber is connected in advance to both ends or one side is provided.
(9) In any one of (1) to (8), the optical fiber is an optical fiber having a holey fiber structure.

The information wiring system of the present invention has the following characteristic configuration.
(10) An information distribution system for wiring the optical fiber cable according to any one of (1) to (9) to a distribution board arrangement portion on an arbitrary floor through a vertical pipe of a building, An optical connector is mounted on the end, and the optical connector on the splitter module side or the optical connector on the cabinet side and the optical connector on the optical fiber cable arranged in the switchboard arrangement part are connected via an adapter. It is characterized by.

  The optical fiber cable and the information wiring system of the present invention can separate and store the optical fiber without using a slot rod by forming, for example, a rectangular or propeller-shaped groove or space in the longitudinal direction of the tension member. Therefore, the diameter can be reduced. Further, by using the cable jacket having a low dynamic friction coefficient, it becomes possible to easily perform the wiring of the optical fiber cable in a place where there is no surplus space. Furthermore, by using an optical fiber cable with an optical connector, the workability of wiring work can be improved.

  In addition, it becomes possible to perform the work of connecting the optical fiber cable into the vertical piping in the building such as a plurality of floors and the connection work in the main switchboard and the intermediate switchboards of each floor without using a specific technique. For this reason, it is possible to perform work other than workers having specific technologies, and as a result, it is possible to shorten the work time for constructing an information wiring system using optical fiber cables in a multi-storey building. . Furthermore, 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.

  Therefore, according to the present invention, the tension member can be reduced in diameter, and the optical fiber cable can be easily wired in a place where there is no excess space, and the workability of the wiring work is further improved. Thus, it is possible to provide an optical fiber cable and an information wiring system.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a conceptual diagram showing a configuration example of an optical fiber cable to which the present invention can be applied. As shown in FIG. 1, a multi-core optical connector 2 (see, for example, Patent Document 3) is provided at one end of an optical fiber cable 1, and a plurality of branches branched by a branching portion 4 at the other end of the optical fiber cable 1. A single-core optical connector 3 is provided at each end of the cord portion 5. The multi-core optical connector 2 and the single-core optical connector 3 are connected to both ends of a plurality of optical fiber strands passed through the optical fiber cable 1 and the cord portion 5. In this case, the branching unit 4 and the code unit 5 do not have to be used, or only one of them may be used as long as the function of the embodiment of the present invention is not impaired.

  FIG. 2 is a conceptual diagram showing another configuration example of the optical fiber cable to which the present invention can be applied. As shown in FIG. 2, multi-core optical connectors 2 are provided at both ends of the optical fiber cable 1, and the multi-core optical connector 2 is connected to both ends of a plurality of optical fiber strands passed through the optical fiber cable 1. Connected.

In addition, the single-core optical connectors 3 may be provided at both ends of the optical fiber cable 1 and connected to both ends of each of a plurality of optical fiber strands that are passed through the optical fiber cable 1.
3 to 10 are sectional views showing configurations of optical fiber cables according to the first to eighth embodiments of the present invention applied to FIG. 1 or FIG. 2, respectively. 3 to 10, the same portions are denoted by the same reference numerals, and redundant description is omitted.

  In the optical fiber cable of the first embodiment shown in FIG. 3, a cylindrical tension member 7 is accommodated in the cable. The tension member 7 has a propeller shape by, for example, forming a plurality of grooves in a spiral shape along the circumferential surface in the longitudinal direction. The propeller-type tension member 7 includes four fins 7A extending from the center in order to form a groove. The space between the fins functions as a tension member space 12 that accommodates the optical fiber 6 having a holey fiber structure.

  The tension member 7 is made of, for example, a metal such as steel wire or stainless steel, or a resin such as FRP, and can be bent with a minimum bending radius of 5 mm or more. In addition, the tensile strength can withstand 200 N or more in order to pass through the vertical piping.

  In the optical fiber cable for accommodating the tension member 7, a large number (8 in the figure) of optical fiber strands 6 are spirally arranged along the groove formed by the tension member space 12, and the dynamic friction coefficient is low around the optical fiber cable 6. A cable jacket 8 made of a material is covered. 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 one type of fluororesin.

The tension member 7 does not have to be spiral as long as the function of the embodiment of the present invention is satisfied. The optical fiber 6 may not be arranged in a spiral shape as long as it satisfies the functions of the embodiment of the present invention.
Unlike the existing indoor optical cable, the optical fiber cable 1 has a substantially cylindrical shape, so that no twisting occurs when wiring the pipe. Therefore, the optical fiber cable 1 can be easily wired along the shape of the meandering vertical piping of the multi-storey building, as compared with the existing indoor optical cable.

  The optical fiber cable of the second embodiment shown in FIG. 4 basically employs a propeller-type tension member 7 similar to that of the first embodiment, but the number of fins 7A is increased. That is, as long as the tension member space 12 is larger than the outer diameter of the optical fiber 6, the number and shape of the fins 7 </ b> A can be arbitrarily changed. In this case, it is possible to store the optical fiber strands 6 one by one in the tension member space 12, and there is an effect of preventing the optical fiber strands 6 from contacting each other.

  The optical fiber cable of the third embodiment shown in FIG. 5 basically employs a propeller-type tension member 7 similar to that of the first embodiment. The tension member 7 is a main tension member serving as a central axis thereof. It is composed of a portion 7B and a sub-tension member portion 7C serving as a fin. In the case of this configuration, different materials can be used, for example, using metal for the main tension member portion 7B and resin for the sub tension member portion 7C. In this case, for example, if a metal is used for the main tension member portion 7B and an elastic resin is used for the sub tension member portion 7C, the optical fiber 6 is prevented from being damaged when it contacts the sub tension member portion 7C. There is a reduction effect.

  The optical fiber cable of the fourth embodiment shown in FIG. 6 basically employs a propeller-type tension member 7 similar to that of the first embodiment, but the entire periphery of the tension member 7 is covered by a tension member cover 7D. I try to cover it. In this case, for example, if the tension member cover 7D is made of an elastic resin or an ultraviolet curable resin, the optical fiber element housed in the tension member space 12 existing between the fans 7A of the tension member 7 is used. There is an effect of preventing breakage when the wire 6 contacts the tension member 7.

  The optical fiber cable of the fifth embodiment shown in FIG. 7 basically employs a propeller-type tension member 7 similar to that of the first embodiment, but holds around the tension member 7 and the optical fiber 6. It is made to hold | grip so that the whole may be wrapped with the winding. In this case, the outer diameter of the presser winding 10 is increased by about 0.1 mm, for example, but the optical fiber 6 housed in the tension member space 12 between the fins 7A of the tension member 7 is used as the tension member space 12. It can be gripped, and has an effect of preventing the optical fiber strand 6 from being displaced.

  The optical fiber cable of the sixth embodiment shown in FIG. 8 basically employs a propeller-type tension member 7 similar to that of the first embodiment, but an optical fiber element is disposed around the fin 7A of the tension member 7. After the wire 6 is stored, the spacer 11 is filled. For the spacer 11, for example, silicon resin or urethane resin is used. Silicone rubber, which is an example of a silicon resin, has a Young's modulus of 2 to 100 MPa. Polyurethane, which is an example of a urethane resin, has a Young's modulus of about 17.9 MPa. For this reason, polyethylene (Young's modulus: 0.4-1.3 GPa), polyolefin (Young's modulus: about 370 MPa), PVC (polyvinyl chloride) (Young's modulus: 2.4-) used for existing indoor optical cables and the like 3.4 GPa) and is flexible and easy to bend. When a filler such as the spacer 11 is encapsulated, the optical fiber 6 is protected like an indoor optical cable, so that there is an effect of being strong against side pressure and impact.

  The tension member 7 is not limited to a shape having a regular n-gonal cross section (n is 3 or more), such as a propeller-type groove, with a line segment drawn from the center to each vertex. When the optical fiber cable of the seventh embodiment shown in FIG. 9 employs a tension member 7 having a rectangular cross section, the optical fiber cable of the eighth embodiment shown in FIG. The tension member 7 is used. However, in the case of a rectangle, the effect on the side pressure and impact is reduced. Here, the shape of the tension member 7 is not particularly limited as long as it satisfies the function of the present invention, and various shapes are conceivable.

  For example, as the structure of the optical fiber cable shown in FIG. 3, FIG. 5, and FIG. 9, as shown in FIG. Alternatively, they may be integrated by covering them with a tension member cover 7D using a resin such as an ultraviolet curable resin, a fluorine resin, a silicon resin, or a urethane resin. The shape of the part may be circular or cloud-shaped.

  FIG. 12 is a cross-sectional view showing the dimensions of the present invention, taking the case of the first embodiment as an example. The distance A is the outer diameter of the present invention, the distance B is the thickness of the cable jacket 8 of the present invention, the distance C is the length of the long side of the tension member 7, and the distance D is the length of the short side of the tension member 7. Here, when the distance B is 0.2 mm, the distance C is 0.45 mm, and the distance D is 0.2 mm, the distance A is 1.5 mm. Further, when the presser winding 10 of the fifth embodiment (FIG. 7) is added to this, the thickness is increased by 0.1 mm, so the distance A is 1.6 mm. At this time, the tensile strength 200N and the bending radius 5 mm are maintained.

  The distance A is a case where two optical fiber strands 6 are accommodated in one tension member space 12, for example, four optical fiber strands 6 are accommodated in one tension member space 12. In this case, the distance C is 0.6 mm, and the distance A is 2.0 mm.

  FIG. 13 is an external view showing the configuration of the cable jacket 8 of the optical fiber cable according to the ninth embodiment of the present invention. As shown in FIG. 13, as a method of reducing the dynamic frictional force of the cable jacket 8, by providing an elliptical uneven portion 8A on the surface of the cable jacket 8, the contact area with the inner wall of the pipe is reduced, so that the dynamic frictional force is reduced. Can be reduced.

  Note that the cable jacket 8 may be formed by using only a silicon resin, a fluororesin, or a urethane resin, or may be provided with the uneven portion 8A, or a combination thereof. Thus, by reducing the dynamic frictional force of the cable jacket 8, the optical fiber cable 1 can be easily wired to the vertical piping of the multi-storey building.

By the way, since the optical fiber cable 1 includes the optical connectors 2 and 3 at both ends as shown in FIG. 1 or FIG. 2, the connection work by photoelectric conversion in the main switchboard and the intermediate switchboard on each floor is eliminated. Therefore, the wiring work in the apartment house becomes easy.
Here, since optical connectors are provided at both ends of the optical fiber cable 1, the size of the optical connector becomes a problem when passing through the pipe. In this case, this problem can be solved by using a small multi-core optical connector such as an MT connector (Mechanical Transferable Splicing Connector) (see, for example, Patent Document 4) as the multi-core optical connector 2 according to the piping. Is possible.

  As described above, since the optical fiber cable of the present invention can have a small diameter, for example, even if the outer diameter of the optical fiber cable of the present invention is 2.0 mm having a large outer diameter, the conventional indoor optical cable, for example, can be used in the same pipe. As compared with the case of (2 × 3.7 mm), the number of wires can be tripled. In addition, when it is set as the optical fiber cable with an optical connector, for example, the optical fiber cable with an optical connector provided with MPO connector (5.5 * 9 * 10mm), since the part of an optical connector is thick, it will be about twice. Eliminates the need for optical connector installation work in the field.

  FIG. 14 is a schematic configuration diagram showing a tension member structure of an optical fiber cable according to a tenth embodiment of the present invention. In this case, as shown in FIG. 14, by forming the notches 7E around the tension member 7 periodically, even if the tension member itself is hard, it can be easily bent. The notch of the tension member 7 can be freely formed according to the shape of the tension member 7 as well as the triangle. Also, the quantity and size may be arbitrary.

  FIG. 15 is an explanatory diagram comparing an optical fiber cable according to an embodiment of the present invention with a conventional optical fiber cable, and experimental data when two types of optical fiber cables are routed one by one through a 16 mm diameter CD tube. It is. As can be seen from this data, when the optical fiber cable according to the present invention is used, the number of lines can be dramatically increased as compared with the case of the conventional indoor optical cable.

16 to 19 are schematic views showing a schematic configuration of the information wiring system of the present invention.
FIG. 16 is a block diagram showing a configuration of an information wiring system according to the eleventh embodiment of the present invention. As shown in FIG. 16, in a building 27 on the fourth floor, a main switchboard (MDF) 25 is installed on the first floor, and an intermediate switchboard (IDF) 26 is installed on each of the second, third, and fourth floors. . Between the main switchboard 25 and the intermediate switchboard 26 on the second floor, between the intermediate switchboard 26 on the second floor and the intermediate switchboard 26 on the third floor, between the intermediate switchboard 26 on the third floor and the intermediate switchboard 26 on the fourth floor. Each of the vertical pipes 15 is provided. The main distribution board 25 and the intermediate distribution board 26 are each provided with a horizontal piping 16 between the terminal ports of each room.

  In the building structure, a horizontal wiring optical fiber cable 17 of the type shown in FIG. 2 is passed through the horizontal piping 16 on the fourth floor, and an end of the horizontal wiring optical fiber cable 17 on the side of the intermediate distribution board 26 is provided. Is provided with a single-core optical connector 2 via a splitter module 19. On the other hand, the optical fiber cable 1 of the type shown in FIG. 1 is inserted into the vertical piping 15 from the intermediate distribution board 26 on the fourth floor to the main distribution board 25 on the first floor from the multi-core optical connector 3 side. . As a result, the branching portion 4 and the single-core optical connector 2 provided at the end of the optical fiber cable 1 are left on the intermediate switchboard 26 side of the fourth floor. In the intermediate distribution board 26 on the fourth floor, the single-core optical connector 2 of the horizontal wiring optical fiber cable 17 and the single-core optical connector 2 of the vertical wiring optical fiber cable 1 are respectively inserted into the adapter 18, thereby The optical fiber cable 1 can be connected to the horizontal wiring optical fiber cable 17.

  According to the system configuration described above, connection processing at the intermediate switchboard 26 is not required as compared with the conventional wiring system, and the optical fiber cable 1 is wired to the vertical piping 15 and constructed only by easy optical connector connection. it can. For this reason, the optical fiber cable is selected according to the piping as in the past, and the optical fiber strand is branched by the intermediate switchboard 26 of each floor, and the optical fiber core wire is covered with a cabinet or a splitter module. This eliminates the need for connection processing that requires a certain amount of experience and technology, such as mechanical splicing and fusion. As described above, according to the system of the present invention, the construction means of the information wiring system is constant and easy, so that it is possible to construct the information wiring system other than an operator having a certain technique.

  Further, in this information wiring system, the optical signal conducted from the accommodation station is branched by the splitter module 19 in the intermediate distribution board 26 on the fourth floor, so that the optical signal conducted to one cable of the present invention is branched into a plurality of signals. (For example, 128 branches), so that it becomes possible to provide optical services to a large number of dwelling units with an optical signal conducted by one cable of the present invention, and the present invention is connected to the pipe. The number of cables can be reduced.

  FIG. 17 is a conceptual diagram showing a schematic configuration of an information wiring system according to the twelfth embodiment of the present invention. In FIG. 17, the same parts as those of FIG. FIG. 17 shows a case where the main switchboard 25 includes the splitter module 19 and the intermediate switchboard 26 on each floor does not include the splitter module. In this system, a single-core optical connector 2 is provided at an end of the horizontal distribution optical fiber cable 17 on the cabinet side of the intermediate switchboard 26. In FIG. 17, by inserting the single-core optical connector 2 of the horizontal wiring optical fiber cable 17 and the single-core optical connector 2 of the vertical wiring optical fiber cable 1 into the adapter 18 in the intermediate distribution board 26 on the fourth floor, The optical fiber cable 1 of the vertical wiring can be connected to the horizontal wiring optical fiber cable 17.

  In FIG. 17, in the main switchboard 25 on the first floor, the multi-core optical connector 3 of the vertical wiring optical fiber cable 1 is connected to the single-core optical connector 21 on the splitter module 19 side via the multi-core / single-core conversion adapter 23 and the adapter 22. Connected to. In the information wiring system, the optical signal conducted from the accommodation station is branched by the splitter module 19 in the main distribution board on the first floor, so that the optical signal conducted to the housing complex is divided into a plurality of (for example, 128 branches). Therefore, when the splitter module cannot be installed in the intermediate switchboard, the main switchboard 25 can provide the optical service to a number of dwelling units with the splitter module 19, and provide the optical service regardless of the form of the apartment house. Is possible.

  FIG. 18 is a conceptual diagram showing a schematic configuration of an information wiring system according to the thirteenth embodiment of the present invention. In FIG. 18, the same parts as those of FIG. FIG. 18 shows a case where the main switchboard 25 and the intermediate switchboard 26 on each floor are not provided with a splitter module, and the single-core optical connector 2 is provided at the end of the horizontal distribution optical fiber cable 17 on the cabinet side. In the intermediate distribution board 26 on the fourth floor, the single-core optical connector 2 of the horizontal wiring optical fiber cable 17 and the single-core optical connector 2 of the vertical wiring optical fiber cable 1 are respectively inserted into the adapter 18, thereby The optical fiber cable 1 can be connected to the horizontal wiring optical fiber cable 17.

  In FIG. 18, in the main distribution board 25 on the first floor, the multi-core optical connector 2 of the optical fiber 1 of the vertical wiring is split via a multi-core / single-core conversion adapter 23 and an adapter 22 and is a splitter module such as a dedicated line or dark fiber. Is connected to the single-core optical connector 21 on the pigtail cord 24 side. In this information wiring system, it is possible to provide an optical service that does not use a splitter module, for example, an SS (Single Star) service such as a dedicated line service that conducts an optical signal in a one-to-one manner from the accommodation station to each dwelling unit of an apartment house. It is possible.

  FIG. 19 is a conceptual diagram showing a schematic configuration of an information wiring system according to the fourteenth embodiment of the present invention. In FIG. 19, the same parts as those of FIG. FIG. 19 shows a case where a splitter module is provided in the main switchboard 25 and the intermediate switchboard 26 on each floor. The single-core optical connector 20 is connected to the end of the horizontal wiring optical fiber cable 17 on the intermediate switchboard 26 side via the splitter module 19. Is provided. In the intermediate distribution panel 26 on the fourth floor, the single-core optical connector 20 with the splitter module 19 of the horizontal wiring optical fiber cable 17 and the single-core optical connector 2 of the vertical wiring optical fiber cable 1 are respectively inserted into the adapter 18. As a result, the optical fiber cable 1 of the vertical wiring can be connected to the horizontal wiring optical fiber cable 17.

  In FIG. 19, the multi-core optical connector 2 of the optical fiber cable 1 of the vertical wiring is connected to the splitter module 19 via the multi-core / single-core conversion adapter 23 and the adapter 22 in the main switchboard 25 on the first floor. Further, in the information wiring system, the optical signal conducted from the accommodation station is branched by the splitter module 19 in the main switchboard 25 on the first floor and the intermediate switchboard 26 on each floor, so that the light conducted to the apartment house is split. It is possible to branch the signal into a plurality of branches (for example, 32 branches). For example, the main switchboard 25 can be branched into four branches, and the four-branched optical signal can be further branched into eight branches at an arbitrary floor. It is possible to provide optical services to many dwelling units on each floor. Therefore, it is possible to flexibly provide the optical service to each floor as compared with the information wiring system realized in FIGS.

  As described above, in the optical fiber cable 1 of the present invention, the tension member 7 is not a combination of a slot rod and a tension member of an existing local optical fiber cable, but the tension member 7 is used instead of the slot rod. Thus, not only can the optical fiber 6 be separated and stored without using a slot rod, but also in the groove of the tension member 7, the optical fiber cable 1 of the present invention is subjected to side pressure and impact. At this time, since the tension member 7 can receive the side pressure and the impact, the optical fiber 6 can be protected from the side pressure and the impact. Therefore, the diameter of the optical fiber cable 1 of the present invention can be reduced compared with the existing local optical fiber cable.

  In addition, by using a material with a low dynamic friction coefficient such as fluororesin or urethane resin for the cable jacket, or by providing an uneven shape to reduce the contact area with the piping / inner wall, the dynamic friction coefficient of the cable jacket surface can be reduced. It is possible to reduce the dynamic frictional force of these cables against the cable coating and the vertical inner wall of the pipe when wiring with other existing cables. For this reason, even if there is no extra space or other cables are already wired in the pipe, the resistance force due to the dynamic friction force is reduced, and the tensile force is reduced, making the optical fiber cable easier. It is possible to connect to the inside of the pipe.

  In addition, the conventional slot rod type can be used because of the use of a thin tension member and the fact that the fiber optic wire housed around the tension member is a single core and does not use the conventional slot rod type optical fiber cable. It is possible to make the diameter smaller than a local optical fiber cable which is an optical fiber cable. Furthermore, since the cable jacket is made of a thin and strong cable, it is possible to reduce the cable outer diameter of the present invention. It is easier to overlap the cables already wired in the pipe than the conventional optical fiber cable.

  On the other hand, when an optical connector is provided at both ends of the optical fiber cable, a splitter module (for example, a patent) that can easily connect the provided optical connector for connection work in a main switchboard in a multi-storey building or an intermediate switchboard on each floor. Since it only needs to be inserted into the literature 5) or an adapter of an optical connector, the connection work can be facilitated.

  From these points, it is possible to route the optical fiber cable to the premises of a multi-storey building without using a specific technology. Since the optical fiber cable can be wired to the premises, and the work becomes easy, the work time can be shortened as compared with the conventional optical fiber cable wiring work. Moreover, in any multi-storey building, the construction of an information wiring system becomes a constant means and the work becomes easy, so that it is easy to construct an information system using optical fiber cables in the multi-storey building premises. Become.

  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. Moreover, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over further embodiments may be appropriately combined.

It is a conceptual diagram which shows the structural example of the optical fiber cable which can apply this invention. It is a conceptual diagram which shows the other structural example of the optical fiber cable which can apply this invention. It is sectional drawing which shows the structure of the optical fiber cable which concerns on the 1st Embodiment of this invention applied to the said FIG. 1 or FIG. It is sectional drawing which shows the structure of the optical fiber cable which concerns on the 2nd Embodiment of this invention applied to the said FIG. 1 or FIG. It is sectional drawing which shows the structure of the optical fiber cable which concerns on the 3rd Embodiment of this invention applied to the said FIG. 1 or FIG. It is sectional drawing which shows the structure of the optical fiber cable which concerns on the 4th Embodiment of this invention applied to the said FIG. 1 or FIG. It is sectional drawing which shows the structure of the optical fiber cable which concerns on the 5th Embodiment of this invention applied to the said FIG. 1 or FIG. It is sectional drawing which shows the structure of the optical fiber cable which concerns on the 6th Embodiment of this invention applied to the said FIG. 1 or FIG. It is sectional drawing which shows the structure of the optical fiber cable which concerns on the 7th Embodiment of this invention applied to the said FIG. 1 or FIG. It is sectional drawing which shows the structure of the optical fiber cable which concerns on the 8th Embodiment of this invention applied to the said FIG. 1 or FIG. FIG. 10 is a cross-sectional view showing another structure of the optical fiber cable shown in FIGS. 3, 5, and 9. It is sectional drawing which showed the dimension of this invention taking the case of 1st Embodiment as an example. It is an external view which shows the structure of the cable jacket of the optical fiber cable which concerns on the 9th Embodiment of this invention. It is a schematic block diagram which shows the tension member structure of the optical fiber cable which concerns on the 10th Embodiment of this invention. It is explanatory drawing which compared the optical fiber cable which concerns on 1st thru | or 10th Embodiment of this invention with the conventional optical fiber cable. It is a block diagram which shows the structure of the information wiring system which concerns on the 11th Embodiment of this invention. It is a block diagram which shows the structure of the information wiring system which concerns on the 12th Embodiment of this invention. It is a block diagram which shows the structure of the information wiring system which concerns on the 13th Embodiment of this invention. It is a block diagram which shows the structure of the information wiring system which concerns on the 14th Embodiment of this invention.

Explanation of symbols

1: optical fiber cable, 2: multi-core optical connector, 3: single-core optical connector, 4: branching part, 5: cord part, 6: optical fiber, 7: tension member, 7A: fin, 7B: main tension Member part, 7C: Sub-tension member part, 7D: Tension member cover, 7E: Notch, 8: Cable jacket, 8A: Uneven part, 10: Presser winding, 11: Spacer, 12: Tension member space, 14: Cable Internal: 15: Vertical piping, 16 Horizontal piping, 17: Horizontal wiring optical fiber cable, 18: Adapter, 19: Splitter module, 20: Single-core optical connector, 21: Single-core optical connector, 22: Adapter, 23 : Multi-core / single-core conversion adapter, 24: Pigtail cord, 25: Main switchboard (MDF), 26: Sub switchboard (ID: F), 27: Building.

Claims (10)

A tension member formed in a columnar shape with grooves or spaces in the longitudinal direction;
An optical fiber disposed in the groove or space of the tension member;
An optical fiber cable, comprising: an optical fiber strand; and a cable jacket covering the tension member. The optical fiber cable according to claim 1, further comprising a spacer using at least one of a fluororesin, a silicon resin, and a urethane resin provided so as to embed a groove or a space of the tension member. The optical fiber cable according to claim 1, wherein the tension member has a rectangular cross section or a propeller shape. The optical fiber cable according to any one of claims 1 to 3, wherein the cable jacket has an uneven surface. The optical fiber cable according to any one of claims 1 to 4, wherein the tension member is formed by periodically forming cutouts along a longitudinal direction of the circumferential surface. 6. The optical fiber cable according to claim 1, wherein the tension member is covered with a fluorine resin, a silicon resin, a urethane resin, or an ultraviolet curable resin. 7. The tension member according to any one of claims 1 to 6, wherein the tension member is formed by combining individual parts of a square, a rectangle, a circle, or a cloud and bonding them together, bringing them together or covering them. Fiber optic cable. The optical fiber cable according to any one of claims 1 to 7, further comprising an optical connector in which the optical fiber is connected to both ends or one side in advance. The optical fiber cable according to any one of claims 1 to 8, wherein the optical fiber is an optical fiber having a holey fiber structure. An information wiring system for wiring the optical fiber cable according to any one of claims 1 to 9 through a vertical piping of a building to a switchboard arrangement portion on an arbitrary floor,
An optical connector is attached to the end of the optical fiber cable,
An information wiring system characterized in that an optical connector on a splitter module side or an optical connector on a cabinet side and an optical connector of the optical fiber cable arranged in the switchboard arrangement portion are connected via an adapter.

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