JP3965199B2 - Laying optical transmission lines in buildings - Google Patents

Description

  The present invention relates to a method for laying an optical transmission line in a building, and more particularly to a method for laying an optical transmission line in a building using an elevator hoistway.

  2. Description of the Related Art In recent years, in buildings such as buildings, communication transmission paths in which optical cables and the like are wired in advance have been provided so that tenants and tenants can easily use communication wiring. This is because the added value of the building itself can be increased.

  The optical transmission line laying method in a building having a plurality of floors is, for example, drawing a branch line optical cable branched from a trunk optical cable into the building, distributing this branch line optical cable with a distributor, and further wiring in the height direction of the building. Wiring to residents and tenants on each floor.

  In a newly constructed building, a wiring route such as wiring piping is secured in advance, and the building is constructed, so that residents and tenants can easily use communication wiring. On the other hand, when a wiring route in the height direction of a building is secured for an existing building, the positions of electric cables and pipes between the floors are investigated by non-destructive inspection using X-rays on the floor of the building. After this pre-investigation, wiring routes are formed in the height direction of the building by opening wiring holes in the floor of the building, avoiding electrical cables and piping, and installing wiring piping.

  As described above, the optical transmission path laying system in an existing building requires a preliminary survey such as a nondestructive inspection. Moreover, the floor wall of a building has a thickness of about 600 mm, and the drilling of wiring holes may be a large-scale operation. With these circumstances, there is a problem that the construction period and cost increase. There is also a problem that the room cannot be used during nondestructive inspection and drilling.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a method for laying an optical transmission line in a building that can be laid at low cost by short-term construction.

The method for laying an optical transmission line in a building according to the present invention is a method for laying an optical cable to a user on each floor of an existing building having a plurality of floors, and a floor for drawing a trunk optical cable into the building and branching it to each floor for connection. Installing a separate distributor on the lower floor of the building, creating a plurality of floor optical cables each having a length from the floor distributor to each floor, each having a different length, and a plurality of floors Place the separate optical cable on the elevator car of the existing building, move the elevator car to the first laying floor in maintenance operation mode, and on the first laying floor, from the elevator car side to the vertical wall of the elevator hoistway, A hole drilling process for opening a wiring hole for passing through, an installation process for placing one end of the floor optical cable on the floor from the elevator car side through the wiring hole, and a floor In the state where the optical cable is passed, from the elevator car side, close the wiring hole with a cap made of thermal expansion material and return the elevator hoistway to the fire protection section state, and maintenance operation mode to the next laying floor Move and perform the drilling process, installation process, and hole closing process from the elevator car side on that floor, and repeat this for each floor in sequence, and install one end of the optical cable for each floor on each floor. a step, in Kaibetsu fractionator, a connecting step of connecting the other end of Kaibetsu optical cable for each floor, respectively, only including, the installation step and the floor installation process, the floor by an optical cable to the elevator cab loaded, that sequentially feeds the floor by an optical cable to the outer upper of the elevator car from the general rescue for port provided in the ceiling portion of the elevator car And butterflies.

In the building optical transmission line laying method according to the present invention, it is preferable that the step of creating the floor optical cable includes a step of fixing an optical distributor at the end of the floor optical cable .

  In the method for laying an optical transmission line in a building according to the present invention, the floor-specific optical cable is wired in the elevator hoistway using an elevator car, so that a scaffold during work can be easily secured.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings.

  First, the overall configuration of the intra-building optical transmission line of the present embodiment will be described, and then a method for laying the intra-building optical transmission path will be described. FIG. 1 is a diagram illustrating an overall configuration in which an in-building optical transmission line according to the present embodiment is laid in a building. The in-building optical transmission line 10 of the present embodiment is suitably applied to an existing building 12, and the building 12 includes an elevator system 14 and has a plurality of floors 16-1 to 16-n. Although the building 12 of FIG. 1 is four stories, it is not limited to this. The building 12 may be a condominium for general residents or an office building in which a plurality of tenants move.

  The intra-building optical transmission line 10 is arranged in the building 12 and the branch line optical cable 20 drawn into the building 12 from the main line optical cable 18, and the branch line optical cable 20 is connected to each floor 16-1 to 16 -n (hereinafter simply referred to as each floor). 16), and a floor-side optical cable that is connected to the floor distributor 22, is wired in the elevator hoistway 24 of the building 12, and is laid on each floor 16 of the building 12. 26 and a termination unit 28 that is fixed to the end of the floor-specific optical cable 26 and is arranged on each floor 16 of the building 12 and is composed of devices for connecting wiring from indoor devices on each floor 16.

  In the present embodiment, the optical cables such as the trunk optical cable 18, the branch optical cable 20, and the floor optical cable 26 can be configured by a general optical cable, and the core is configured by plastic or high-purity glass, and its surroundings. Is covered with a cover of synthetic resin or the like. These optical cables are appropriately selected according to the required data transmission capacity.

  The trunk optical cable 18 is configured by an Internet network, a regional IP network optical cable, or the like, and the branch optical cable 20 is an optical cable branched from the trunk optical cable 18 and drawn into a predetermined building 12. In FIG. 1, one branch line optical cable 20 is drawn into the building, but a plurality of branch line optical cables 20 may be provided.

  The floor distributor 22 is an optical distributor having a function of branching the branch line optical cable 20 into a plurality of floor optical cables 26. The floor distributor 22 has an input side connection terminal for connecting the branch line optical cable 20 and an output side connection terminal for connecting a plurality of floor optical cables 26. The input side connection terminal and the output side connection terminal are optical wiring circuits. It is connected. The floor distributor 22 can be arranged at any location in the building 12. The floor distributor 22 may be located outside the building 12 and may be disposed in the elevator hoistway 24 in the building. The floor distributor 22 can be composed of, for example, an MDF (Main Distribution Frame) device or a PON (Passive Optical Network) device.

  The floor optical cable 26 is an optical cable whose base end side is connected to the floor distributor 22 and branches the branch line optical cable 20 to each floor 16 of the building 12. In the present embodiment, the floor optical cable 26 is wired in the elevator hoistway 24. In this way, since the floor-specific optical cable that is the vertical series wiring in the height direction of the building 12 is wired in the elevator hoistway 24, the wiring route in the height direction as described in the background art is provided. Preliminary surveys and floor wall drilling operations can be eliminated. For example, one optical cable is prepared for each floor 16 for the floor optical cable 26, and if the building has a four-story building 12 shown in FIG. 1, four floor optical cables 26 are wired. As described above, it is preferable that one floor-specific optical cable 26 is wired for each floor, and in this way, a laying space in the elevator hoistway 24 can be minimized. In addition, since the floor-specific optical cables 26 are used for wiring, the cable weight can be dispersed. In addition, since the elevator hoistway 24 to which the floor-specific optical cable 26 is wired is a fire prevention section, a communication path can be secured even in the event of a disaster.

The termination unit 28 is fixed to the termination of the floor optical cable 26 and is disposed on each floor 16.
For example, it is arranged in the ceiling space of each floor 16. Such an arrangement can be performed by forming a wiring hole 32 in the elevator hoistway wall 30 that partitions the room of the building 12 and the elevator hoistway 24 and penetrating the floor-specific optical cable 26 through the wiring hole 32. . The termination unit 28 is composed of equipment for connecting wiring from indoor equipment on each floor 16. For example, a wiring from an indoor device on the first floor is connected to the terminal unit 28 arranged in the ceiling space on the first floor.

  FIG. 2 is a diagram illustrating a specific example of the termination unit 28. As shown in FIG. 2, the termination unit 28 includes, for example, a media converter 34, a HUB 36, and a power supply device 38 that supplies power to the media converter 34. The floor optical cable 26 is connected to the media converter 34, and these devices 34, 36, and 38 are accommodated in, for example, one box, so that the floor optical cable 26 and the termination unit 28 can be fixed. Thus, since the termination unit 28 includes a device for connecting wiring from the indoor device, the indoor device can be connected to the HUB 36 such as an indoor terminal or a LAN cable by simply connecting the indoor device to the in-building optical transmission line 10. Can be connected to.

  Note that the termination unit 28 is intended to facilitate wiring from indoor devices on each floor 16. Therefore, for example, when an optical cable is further wired from the termination unit 28 to individual users, the termination unit 28 may be configured only by an optical distributor or the like.

  Before the optical transmission line 26 and the termination unit 28 are formed in the building 12, the above-mentioned floor optical cable 26 and the termination unit 28 are fixed in advance as shown in FIG. Is preferred. Thereby, as will be described later, laying work in a building can be performed in a short time. In this case, according to the scale of the building 12 and the number of indoor devices, the floor optical cable 40 with termination unit can be produced by selecting appropriate ones of the floor optical cable 26 and termination unit 28.

  For example, in the above-described example, one optical cable 26 for each floor is prepared for each floor. For example, when it is necessary to secure a large data communication capacity on a certain floor, several floor-specific optical cables 26 may be prepared for that floor. Naturally, when several floor-specific optical cables 26 are laid, the configuration of the termination unit 28 is appropriately changed accordingly.

  In addition, the cable length of the floor-specific optical cable 26 may be adjusted in advance according to the floor to be laid.

  Further, according to the number of floors and the floor area of the building 12, the number of floor-specific optical cables 26, the configuration of the termination unit 28, and combinations thereof may be determined.

  The floor optical cable 26 and the terminal unit 28 are preferably provided with a floor mark that can identify the floor in order to facilitate later installation work and management. For example, the floor mark can be implemented by attaching letters representing the floor and color seals different from each other to the floor optical cable 26 and the terminal unit 28. Moreover, you may change the color of the resin cover which coat | covers the optical cable 26 according to a floor. Further, since the base end side of the floor optical cable 26 is connected to the floor distributor 22, it is preferable to attach an identifiable mark to the base end side.

  Next, a method for laying an in-building optical transmission line according to this embodiment will be described. FIG. 3 is a diagram illustrating a state in which the termination unit and the floor-specific optical cable are wired, and FIG. 4 is a flowchart illustrating a work flow. The in-building optical transmission line is preferably laid when the elevator system 14 is renewed.

  The above-mentioned floor-specific optical cable 40 with a termination unit is prepared in advance according to the scale of the building 12 and the number of indoor devices (S10). Next, the wiring hole 32 is formed in the hoistway wall 30 so that the elevator hoistway 24 and the building interior space communicate with the hoistway wall 30 (S12). The wiring hole 32 is desirably opened at a position communicating with the ceiling space of each floor 16. As a result, the floor-specific optical cable 26 can be wired without being exposed to the indoor space. The construction work of the wiring hole 32 can be performed by the worker S getting on the elevator car 42 and using the elevator car 42 as a scaffold. The movement of the worker S may be performed by operating the elevator car 42 at a low speed such as a maintenance mode.

  Next, the floor optical cable 40 with termination unit is placed on the elevator car 42. Then, while the elevator car 42 is lowered from the upper floor to the lower floor, the terminal unit 28 is arranged in the ceiling space from the wiring hole 32 (S14). After the termination unit 28 is disposed in the ceiling space, the wiring hole 32 is closed with a cap made of a material for thermal expansion, and measures for the fire prevention section are taken. Further, since the floor optical cable 26 is hung from the wiring hole 32 to the elevator hoistway 24 side, for example, a circle is drawn from the wiring hole 32 so that the floor optical cable 26 is not damaged. It is good to hang down.

  In this way, if the terminal unit 28 is disposed in the space behind the ceiling while the elevator car 42 is lowered to the fourth floor, the third floor, the second floor, and the first floor, the floor-specific optical cable placed on the elevator car 42 26 is naturally unwound and wired in the elevator hoistway 24 (S16).

  When wiring the floor-specific optical cable 26, it is preferable to wrap around the messenger wire or the like so as not to get entangled. This messenger wire may be an existing one used for an elevator electric cable, or may be provided separately for the floor-specific optical cable 26. In addition, since the optical cable 26 and the like from the upper floor may increase in weight, it is fixed to the inner wall of the elevator hoistway 24 in the middle of the optical cable 26 or the elevator hoistway 24 is spirally formed. They may be arranged and wired. Thereafter, the floor optical cable 26 is connected to the floor distributor 22 (S18).

  In the embodiment described above, the laying work is performed while lowering the elevator car 42 from the upper floor to the lower floor, but the laying work may be performed while being lifted from the lower floor to the upper floor.

  In the laying operation, the elevator car 42 needs to be stopped at a predetermined position when the wiring hole 32 is opened or when the terminal unit 28 is arranged. Therefore, an operation mode that can be easily stopped at a predetermined position may be provided in the elevator control device.

  Before or after the termination unit 28 and the floor optical cable 26 are wired, as shown in FIG. 1, the branch line optical cable 20 is drawn into the building from the trunk optical cable 18 and connected to the floor distributor 22. Thereby, the optical transmission line in a building is completed.

  In such a wiring method, the elevator car 42 can be used as a scaffold for laying work in the elevator hoistway 24.

  As described above, since the floor-specific optical cable 26 is wired in the elevator hoistway 24, it is not necessary to perform preliminary investigations and floor wall drilling work as described in the background art, and laying work can be performed in a short period of time. can do.

  Moreover, in the laying method mentioned above, since the elevator car 42 can be used as a movable scaffold for laying work, work efficiency can be improved thereby.

  In FIG. 3, the floor optical cable 40 with the termination unit is described as being placed on the ceiling of the elevator car 42, but the floor optical cable 40 with the termination unit is placed in the elevator car 42 and the interior of the elevator car 42. It is also possible to sequentially feed the optical cable 26 for each floor to the ceiling side of the elevator car 40. As the opening for the feeding, a general rescue opening provided at the ceiling of the elevator car and usually covered with a lid can be used. Preferably, an appropriate cable guide for feeding is provided.

  FIG. 5 is a view showing a state of the elevator car 42 having such a configuration. This figure is a diagram showing the interior of the elevator car 42 and the vicinity of the ceiling of the elevator car 42 when the optical transmission line in the building is laid. When the in-building optical transmission path is laid, a lid (not shown) is removed from the general rescue port 50 in the ceiling of the elevator car 42. Then, a floor optical cable 40 with a termination unit is placed in the elevator car 42. In this case, as shown in FIG. 3, the floor-specific optical cables 40 with termination units for each floor may be stacked one after another, but preferably, as shown in FIG. What wound the separate optical cable 40 is good to use. By using the drum 52 around which such an optical cable is wound, the laying workability of the optical cable can be improved.

  The floor 52 of the optical fiber 40 with the termination unit for each floor may be wound around the drum 52 separately. As shown in FIG. 2, the relationship between the length and the position of the optical fiber cable 40 with the termination unit for each floor is provided. Is determined in advance, it is possible to connect the floor-specific optical cables 40 with terminal units for each floor while maintaining the positional relationship of the lengths. For example, if the lengths of the optical cables 40 with termination units for each floor have a difference of 7 m, the floor optical cables 40 with termination units on the uppermost floor are located 7 m below the end of the optical cable 40 with the termination unit for each floor. The terminal units 28 are connected to each other so that the terminal units 28 come. Similarly, the floor optical cables 40 with terminal units for all the floors are connected to each other and can be wound around the drum 52. In this way, if the optical fiber 40 with the terminal unit on the top floor is pulled out from the drum 52, the optical cable 40 with the terminal unit on the next floor can be sequentially pulled out every 7 m. This linking method can also be applied to the floor optical cable 40 with a termination unit described with reference to FIG.

  The cable guide 60 is a member that is provided in the vicinity of the general rescue port 50 of the elevator car 42 and has a function of appropriately guiding and holding the floor optical cable 26 that is sequentially fed from the drum 52. The cable guide 60 can be provided as a standard in the elevator car 42 from the beginning, but preferably, the elevator car 42 is only provided with a mounting portion such as a mounting screw hole. In this way, no extra member is provided in the ceiling part of the elevator car 42 under normal circumstances, and the cable guide 60 is specially attached detachably using this attachment part when laying the optical cable. Can do.

  FIG. 6 is a diagram illustrating a state in which the cable guide 60 is attached to the vicinity of the general rescue port 50 outside the ceiling portion of the elevator car 42. The cable guide 60 includes support arms 64 and 68 having guide rolls 62 and 66 at their tips, and biasing means 70 such as a spring that biases the two guide rolls 62 and 66 so as to approach each other, The base 72 is configured to fix the base of one support arm 64 and to turn the other support arm 68 in a freely rotatable manner. As the guide rolls 62 and 66, metal or plastic cylindrical rolls can be used, and the cylindrical surfaces are processed smoothly and preferably subjected to a lubricious surface treatment. The base 72 is firmly and detachably attached to an attachment portion 51 provided in the vicinity of the general rescue port 50 on the ceiling portion of the elevator car 42. In addition to the mounting screw hole, the mounting portion 51 may use, for example, a snap hole that detachably covers a lid (not shown) that covers the general rescue port 50.

  The operation of the cable guide 60 is as follows. The cable guide 60 is set by removing the lid that covers the general rescue port 50 of the elevator car 42 when the optical cable is laid in the building, and the base 72 is firmly attached to the mounting portion 51 provided in the vicinity thereof. The At this time, the two guide rolls 62 and 66 are in contact with each other by the biasing means 70. When laying the floor optical cable 26, the floor optical cable 26 of a predetermined floor is led from the drum 52 in the elevator car 42 to the general rescue port 50 which is an opening in the ceiling of the elevator car 42. It is sandwiched between guide rolls 62 and 66. Then, if the optical cable 26 for each floor is fed out while being sandwiched between the two guide rolls 62 and 66, the guide rolls 62 and 66 change the mutual distance while adapting to the movement of the cable with an appropriate urging force. Rotate while guiding and guiding while supporting the cable. In this way, the floor-specific optical cables 26 are sequentially fed out of the ceiling 52 of the elevator car 42 from the drum 52 in the elevator car 42 while being guided by the cable guide 60.

  FIG. 7 is a view showing a state in which the floor optical cable 26 is sequentially fed out from the drum 52 placed in the elevator car 42, and the termination unit and the floor optical cable are wired, and corresponds to FIG. 3 described above. is there. The work flow is the same as that described with reference to FIG. 4, and only the contents of the steps after S14 are partially different.

  As described above, the wiring hole 32 construction work step (S12) can be performed by the worker S getting on the elevator car 42 and using the elevator car 42 as a scaffold, and the movement of the worker S is performed in the elevator car. It is the same that 42 may be performed by low speed operation such as maintenance mode.

  Next, the drum 52 around which the optical fiber cable 40 with a termination unit is wound is placed in the elevator car 42. Then, the worker S removes the lid fitted in the general rescue port 50 in the ceiling portion of the elevator car 42 and attaches the cable guide 60 using the attaching portion 51 provided in the periphery thereof. Next, the floor-specific optical cable 40 with a terminal unit for a predetermined floor is taken out from the drum 52 to the outside of the ceiling portion of the cable cage 42 from the general rescue port 50 and is sandwiched between the cable guides 60. Then, the floor-specific optical cables 26 are successively fed out, and the termination unit 28 is arranged in the ceiling space from the wiring hole 32 while lowering the elevator car 42 from the upper floor to the lower floor (S14).

  In this way, if the terminal unit 28 is arranged in the ceiling back space while the elevator car 42 is lowered to the fourth floor, the third floor, the second floor, and the first floor, the drum placed in the elevator car 42 room. The floor-specific optical cable 26 is sequentially drawn out from 52 and wired in the elevator hoistway 24 (S16). Thereafter, the floor optical cable 26 is connected to the floor distributor 22 (S18). The laying work may be performed while raising the elevator car 42 from the lower floor to the upper floor.

It is a figure which shows the whole structure by which the optical transmission line in a building of this embodiment was laid in the building. It is a figure which shows the example of a termination | terminus unit. It is a figure which shows a mode that a floor-specific optical cable and a termination | terminus unit are wired. It is a flowchart which shows the flow of work. It is a figure explaining a mode in the case of putting a floor optical cable with a termination unit in an elevator cab. It is a figure explaining the structure etc. of a cable guide. It is a figure which shows the flow of an operation | work in the case of putting a floor optical cable with a termination unit in an elevator cab.

Explanation of symbols

  10 building optical transmission path, 12 building, 14 elevator system, 16 floor, 18 trunk optical cable, 20 branch line optical cable, 22 floor distributor, 24 elevator hoistway, 26 floor optical cable, 28 termination unit, 30 elevator hoistway wall , 32 Wiring hole, 34 Media converter, 36 HUB, 38 Power supply unit, 40 Floor optical cable with terminal unit, 42 Elevator car, 50 General rescue port, 51 Mounting part, 52 Drum, 60 Cable guide, 62, 66 Guide Roll, 64, 68 support arm, 70 biasing means, 72 base.

Claims (2)

A method of laying optical cables to users on each floor of an existing building having multiple floors,
Installing a floor distributor on the lower floor of the building for drawing the trunk optical cable into the building and branching it to each floor for connection;
A step of creating a plurality of floor optical cables each having a length from the floor distributor to each floor, each having a different length;
Placing a plurality of floor-specific optical cables on an elevator car in an existing building and moving the elevator car to the first laying floor in maintenance operation mode;
On the first laying floor, from the elevator car side, a hole forming step for opening a wiring hole for passing a cable according to the floor on the vertical wall of the elevator hoistway;
From the elevator car side, the installation process of placing one end of the floor optical cable on the floor through the wiring hole,
A hole closing step of closing the wiring hole with a cap made of a material for thermal expansion from the elevator car side while passing the optical cable by level, and returning the elevator hoistway to the state of the fire prevention compartment,
In the maintenance operation mode, move to the next laying floor, and on that floor, perform the drilling process, installation process and hole closing process from the elevator car side. Each floor installation process to install one end of the optical cable,
A connecting step for connecting the other end of the optical fiber cable for each floor to the floor separator,
Only including,
The installation process and each floor installation process are:
The in-building light is characterized in that the optical cable for the floor is placed in the elevator car room, and the optical cable for the floor is sequentially delivered from the general rescue port provided in the ceiling portion of the elevator car to the outer upper part of the elevator car. How to lay transmission lines. In the construction method of the optical transmission line in a building of Claim 1,
The method of laying an optical transmission line in a building is characterized in that the step of creating an optical cable by level includes the step of fixing an optical distributor at the end of the optical cable by level.

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