JP2008191600A - Method of installing optical trunk cable in building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of installing an optical trunk cable in a building by which branched optical trunk cabls are safely installed, optical property tests of optical branch line cables of respective floors are performed, and then the laying work of the optical trunk cable can early be finished, and to provide the branched optical trunk cable. <P>SOLUTION: The method includes: a process of installing a lower split optical trunk cable to be installed in a building body, wherein a split optical trunk cable is one for which optical branch line cable is processed for branching for each floor in a state with a multiple-floor building body finished; a process of performing an optical property test for the lower part, in which an optical property test is performed for the optical branch line cable of each floor; a process of installing an upper split optical trunk cable, in which the upper part of the upper split optical trunk cable is fixed to the upper part of the building body in a state with the upper multiple-floor building body finished and in which the lower end is connected to the upper end of the lower split optical trunk cable; and a process of performing an optical property test for the upper part, in which an optical property test is performed for the optical branch line cable of each floor in the upper split optical trunk cable. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for installing an optical trunk cable in a building.

Conventionally, when installing an optical trunk cable for a building, after the building frame is finished, the optical trunk cable with a length corresponding to the height dimension of the building is lifted using a winch or crane and installed in a suspended state. After branching the optical branch line cable for each floor, the optical characteristic test process of the optical branch line cable for each floor was performed.

For this reason, since the optical trunk line cable with the length almost the same as the height of the building is used, the higher the height, the heavier, the harder the laying work becomes, and there is a disadvantage that it becomes a dangerous work. Only after the housing is finished, the laying work and the optical property test work cannot be performed, and the completion of the building is delayed due to the laying of the optical trunk cable.
JP 2003-279820 A

    In view of the above-described conventional drawbacks, the present invention aims to shorten the time for wiring an optical cable after the housing of a high-rise building is finished, and to reduce the cost, although it depends on the optical cable itself and the wiring.

The above and other objects and novel features of the present invention will become more fully apparent when the following description is read in conjunction with the accompanying drawings.
However, the drawings are for explanation only and do not limit the technical scope of the present invention.

In order to achieve the above-mentioned object, the present invention provides a lower split light that installs a split optical trunk cable obtained by branching an optical branch cable for each floor in a state where a multi-storey building enclosure is finished in the building enclosure. Installation process of the main line cable, an optical characteristic test process of the lower part for performing an optical characteristic test of the optical branch line cable for each floor after the installation process of the lower divided optical main line cable, and the lower divided optical main line cable installation process Later, the upper part of the upper divided optical trunk cable is fixed to the upper part of the building frame in a state where the upper multi-storey building frame is finished, and the lower end is installed in the lower divided optical main line cable installation step. Installation process of the upper split optical trunk cable connected to the upper end of the split optical trunk cable, and the upper split optical trunk cable after the upper split optical trunk cable installation process It consists of an upper optical characteristic test process for performing optical characteristic tests of optical branch line cables for each floor.In the present invention, a plurality of optical cables are joined together to connect a series of cables from the lowest floor to the highest floor, To do.
The division of the optical cable is matched to the number of floors of the chassis that can be assembled at one time. The number of branch lines branched from the trunk line of the optical cable is also adjusted to the number of floors of the chassis to which it is wired.
Thereby, whenever an enclosure is assembled, an optical cable is wired to that portion, and the wiring and testing of the optical cable can be completed while the upper enclosure is being assembled.

The present invention is a lower part in which a multi-fiber connector is attached to both ends in a state where a multi-storey building frame is finished, and a split optical trunk cable in which an optical branch cable for each floor is branched is installed in the building frame The split optical trunk cable installation step, the lower split optical trunk cable installation step, the lower optical property test step of measuring the optical property test of the optical branch line cable for each floor, and the lower splitting After the optical trunk cable installation process, the multi-fiber connection connector at the lower end of the split optical trunk cable is installed on the lower floor with the multi-level building frame completed, and the multi-fiber connection connector at the upper end of the split optical trunk cable installed on the lower floor And at least one intermediate split optical trunk cable installation step installed in the building frame, and for each floor of the installed intermediate split optical trunk cable An intermediate installation process that sequentially performs an intermediate optical characteristic test process that performs optical characteristic tests of the optical branch line cable at least once, and after the installation of the uppermost multi-story building after completion of the intermediate installation process The upper split optical trunk cable suspending tool with the suspending tool attached to the upper end is locked to the locking tool provided at the upper part of the building frame, and the multi-fiber connector at the lower end is connected to the intermediate installation step. Each of the upper split optical trunk cable after the installation process of the upper split optical trunk cable and the upper split optical trunk cable installation process to be connected to the multi-core connector at the upper end of the intermediate split optical trunk cable installed in The installation method of the optical trunk line cable in the building is composed of the optical characteristic test process in the upper part for performing the optical characteristic test of the optical branch line cable for the floor.

  As is clear from the above description, the present invention has the following effects.

(1) Compared to wiring a series of lengths of optical cable after the housing is finished, the time required for wiring and testing is shortened by the amount of the optical cable that was wired and tested before the last housing was assembled. The construction period for optical cable wiring and testing after finishing is shortened.

(2) Compared to lifting a series of optical cables with a winch or the like, in the present invention, the distance for lifting the cable is short, and installation is easy without requiring a large facility for lifting. Laying costs can also be reduced.

(3) In the second and subsequent optical cables from the bottom, the number of cores included in the trunk line can be reduced by the number of cores wired up to the floor below.
Therefore, the cost of the optical cable can be reduced.

(4) In claim 2, the same effects as in the above (1) to (3) can be obtained.

(5) In claim 3, the same effects as in the above (1) to (3) can be obtained, and the lower split optical trunk cable and the upper split optical trunk cable have the same optical branch cable for each floor. The branching process can be used by connecting a multi-fiber connector.
Therefore, the connection work is easy and the enforcement cost can be reduced.

  Hereinafter, the present invention will be described in detail with reference to the best mode for carrying out the present invention shown in the drawings.

  In the first preferred embodiment for carrying out the present invention shown in FIGS. 1 to 7, reference numeral 1 denotes an optical trunk cable installation method for a building according to the present invention in which an optical trunk cable is installed in a new building. The optical trunk line installation method 1 has a plurality of floors, for example, the third floor to the tenth floor. In the embodiment of the present invention, the multi-connector connectors 3 and 4 are attached to both ends in a state where the building housing 2 of about four floors is finished. The lower split optical trunk cable 6 for installing the lower split optical trunk cable 6 on which the optical branch cables 5, 5, 5, 5 for each floor are branched using the fixture 7 is installed in the building housing 2. An installation step 8; a lower optical property test step 9 for performing an optical property test of the optical branch line cables 5, 5, 5, 5 for each floor after the installation step 8 of the lower split optical trunk cable; and the lower portion Split optical trunk cable installer 8 and the lower end of the split optical trunk cable 6 that is the same as the lower split optical trunk cable 6 in the state in which the building housing 2A having a plurality of floors, for example, the third floor to the tenth floor, and about four floors in the embodiment of the present invention is finished. The multi-fiber connector 3 is connected to the multi-fiber connector 4 at the upper end of the split optical trunk cable 6 installed on the lower floor, and is installed in the building housing 2A using the fixture 7 at least once. At least one optical characteristic test of the intermediate split optical trunk cable installation step 10 and the optical branch line cables 5, 5, 5, 5 for each floor of the installed intermediate split optical trunk cable 6 is performed at least once. An intermediate installation step 12 for sequentially performing the intermediate optical characteristic test step 11, and a plurality of uppermost floors after the installation in the intermediate installation step 12, for example, the third to the tenth floors, in the embodiment of the present invention, four floors In the state in which the building housing 2B is finished, the hanging tool 13 of the upper split optical trunk cable 14 having the hanging tool 13 attached to the upper end is engaged with the locking tool 15 provided on the upper part of the building housing 2B. Of the upper split optical trunk cable that connects the multi-core connector 3 at the lower end with the multi-connector connector 4 at the upper end of the upper middle split optical trunk cable 6 installed in the intermediate installation step 12. Upper optical characteristic test for performing optical characteristic tests on the optical branch line cables 5, 5, 5, and 5 for each floor of the upper divided optical trunk cable 14 after the installation process 16 and the upper divided optical trunk cable installation process 16 And step 17.

  The lower split optical trunk cable 6 and the intermediate split optical trunk cable 6 have the same structure, and a slot rod 19 in which ten slots 18 are formed at a predetermined interval, and ten slots 18 of the slot rod 19. Four cores 20, 20, 20 inserted three by three, a presser winding 21 wound around the outer periphery of the slot rod 19, and a sheath 22 covering the outer periphery of the presser winding 21, A portion of the sheath 22 positioned on each floor is cut out, and optical branch line cables 5, 5, 5, 5 for each floor having caps 23 attached to leading ends formed by pulling out predetermined tape core wires 20, and A cover portion 27 is formed by covering the cutout 24 of the part where the optical branch line cables 5, 5, 5, 5 for each floor are drawn out with the self-bonding tape 25 and the heat shrinkable tube 26. It is.

The optical trunk line installation method 1 for a building having the above-described configuration is a plurality of floors, for example, the third floor to the tenth floor, and in the embodiment of the present invention, the next multiple floors, for example 3 In the embodiment of the present invention, the divided main trunk cable 6 and the optical branch line cables 5, 5, 5, 5 and the optical branch line cables 5, 5, before the building housing 2 </ b> A having about four floors is finished in the embodiment of the present invention. 5 and 5 optical property tests can be performed. Installation of optical trunk cable after all building frames are finished, installation of optical branch cable on each floor, and these optical property tests The man-hours can be remarkably shortened.
In the embodiment of the present invention, the optical trunk cable is installed in a state where the building housing 2A of about 4 floors is finished. For example, in the case of a 28 floor building, It is only necessary to use four split optical trunk cables 6 having a length obtained by dividing the length of the building frame 2A into four, and the process after the building is finished can be shortened.
In addition, the labor for the test can be reduced to a quarter.
Furthermore, it is easier to pull up or drop a short cable than to lay (pull or drop) a single cable from the bottom layer to the top layer. The weight of the cable handled in one operation is reduced, a lifting device is required, and the cost can be reduced accordingly.
For example, when a 300-core cable is wired, conventionally, the trunk line has 300 cores from the bottom to the top, and even a core line that is branched and not used is from the lower end to the upper end of the trunk line.
In the embodiment of the present invention, the first to fourth floors have 300 cores, the fourth to eighth floors have 230 cores, and the eighth to twelfth floors have 160 cores. As the core wire is reduced, the weight of the cable becomes lighter and handling becomes easier.
Long cables have poor yields and high unit prices. For example, if one part is cut off during the production, the whole cannot be used. The longer it is, the greater the risk of being cut off. Since the split optical trunk cable of the present invention is short, there is little risk of being cut off halfway, and the yield is relatively good and the cost is reduced.
Further, as described above, the number of cores is less and the waste is less as the cable used above. The cost can be further reduced.
Furthermore, the height of the building may be two, that is, the lower split optical trunk cable and the upper split optical trunk cable.
[Different forms for carrying out the invention]

  Next, different modes for carrying out the present invention shown in FIGS. 8 to 16 will be described. In the description of these different modes for carrying out the present invention, the same components as those in the best mode for carrying out the present invention are designated by the same reference numerals and redundant description is omitted. To do.

  The second embodiment for carrying out the present invention shown in FIGS. 8 to 10 is mainly different from the best first embodiment for carrying out the present invention in that a main terminal board 28 installed on the lower floor is used. The lower split optical trunk cable installation process 8A is performed using the lower split optical trunk cable 6A having a lower lower portion so that it can be connected even if they are separated from each other. Even if the building optical trunk cable installation method 1A using the step 8A is performed, the same effects as those of the best mode for carrying out the present invention can be obtained.

  The third embodiment for carrying out the present invention shown in FIGS. 11 to 13 is mainly different from the best first embodiment for carrying out the present invention in that the divided optical trunk line on the upper part for the third floor is used. Even if the installation method 1B of the optical trunk line cable of the building using such an upper divided optical trunk cable installation step 16A is performed, the installation step 16A of the upper divided optical trunk cable is performed using the cable 14A. The same effects as those of the best mode for carrying out the present invention can be obtained.

  The fourth embodiment for carrying out the present invention shown in FIGS. 14 to 16 is mainly different from the best first embodiment for carrying out the present invention in that the building housing 2 of about 10 floors is finished. In this state, the multi-fiber connection connectors 3 and 4 are attached to both ends, and the lower split optical trunk cable 6 in which the optical branch cable 5 for each floor is branched is attached to the building housing 2 using the fixture 7. The lower split optical trunk cable installation process 8 and the lower split optical trunk cable installation process 8 and the lower optical characteristic test process 9 for performing the optical characteristic test of the optical branch cable 5 for each floor after the lower split optical trunk cable installation process 8. After the lower split optical trunk cable installation step 8, the upper split optical trunk cable 1 with the hanging tool 13 attached to the upper end in a state where the uppermost building housing 2B having about 10 floors is finished. Is suspended by a latch 15 provided at the upper part of the building housing 2B, and the multi-fiber connector 3 at the lower end is installed in the lower split optical trunk cable installation step 8 above. An upper split optical trunk cable installation step 16 connected to the multi-core connector 4 at the upper end of the middle split optical trunk cable 6 at the lower position of the position, and an upper split light after the upper split optical trunk cable installation step 16 An optical trunk cable installation method 1C for such a building in that the optical characteristic test step 17 for performing the optical characteristic test of the optical branch line cables 5, 5, 5, 5 for each floor of the trunk cable 14 is performed. Even if it performs, the same effect as the best 1st form for implementing the said invention is acquired.

In each of the embodiments for carrying out the present invention, ten slots are formed as the divided optical trunk cable 6 between the lower divided optical trunk cables 6 and 6A and the upper divided optical trunk cables 14 and 14A. Although the description has been given of the case where three pieces of four cores are inserted into each slot, the present invention is not limited to this, and a case where a plurality of tape cores are inserted into a plurality of slots may be used. Good.
Moreover, you may use the thing for the length of 3rd-10th floors.
Further, in each embodiment for carrying out the present invention, the lower divided optical trunk cable 6, 6A, the middle divided optical trunk cable 6, the upper divided optical trunk cable 14, 14A, the lower divided optical trunk cable 6, 6A, and Although the description has been given of the multi-connector connectors 3 and 4 attached and connected to the upper and lower ends of the upper split optical trunk cables 14 and 14A, the present invention is not limited to this, and the lower split optical trunk cables 6 and 6A, As long as the middle divided optical trunk cable 6 and the upper divided optical trunk cables 14, 14A, the lower divided optical trunk cables 6, 6A and the upper and lower ends of the divided optical trunk cables 14, 14A can be connected, A connection method may be used.

  INDUSTRIAL APPLICABILITY The present invention is used in industries that install optical trunk cables in buildings and industries that manufacture split optical trunk cables.

FIG. 3 is a process diagram of the best first embodiment for carrying out the present invention. The front view of the division | segmentation optical trunk line cable of the lower part of the best 1st form for implementing this invention. The expanded sectional view of the bifurcation part of the best 1st form for implementing this invention. The expanded sectional view which follows the 4-4 line of FIG. Explanatory drawing of the installation process of the division | segmentation optical trunk line cable of the lower part of the best 1st form for implementing this invention. Explanatory drawing of the installation process of the intermediate | middle division | segmentation optical trunk line cable of the best 1st form for implementing this invention. BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing of the installation process of the upper part divided | segmented optical trunk line cable of the best 1st form for implementing this invention. Process drawing of the 2nd form for implementing this invention. Explanatory drawing of the installation process of the split optical trunk line cable of the lower part of the 2nd form for implementing this invention. Explanatory drawing of the optical trunk line cable of the lower part of the 2nd form for implementing this invention. Process drawing of the 3rd form for implementing this invention. Explanatory drawing of the installation process of the split optical trunk cable of the upper part of the 3rd form for implementing this invention. Explanatory drawing of the division | segmentation optical trunk line cable of the upper part of the 3rd form for implementing this invention. Process drawing of the 4th form for implementing this invention. Explanatory drawing of the installation process of the division | segmentation optical trunk line cable of the lower part of the 4th form for implementing this invention. Explanatory drawing of the division | segmentation optical trunk line cable of the upper part of the 4th form for implementing this invention.

Explanation of symbols

1, 1A, 1B: Installation method of optical trunk cable of building,
2, 2A, 2B: Building housing 3, 4, Multi-fiber connector
5: Optical branch line cable, 6: Lower split optical trunk cable,
7: Mounting tool,
8: Installation process of lower split optical trunk cable,
9: Lower optical property test process,
10: Intermediate split optical trunk cable installation process,
11: Intermediate optical property test method,
12: Intermediate installation process, 13: Hanging tool,
14, 14A: upper split optical trunk cable,
15: Locking tool,
16, 16A: Installation process of the upper split optical trunk cable,
17: Upper optical property test process,
18: Slot, 19: Slot rod,
20: Tape core wire, 21: Presser roll,
22: sheath, 23: cap,
24: Notch, 25: Self-bonding tape,
26: heat shrinkable tube, 27: cover part,
28: Main terminal board.

Claims (3)

The split optical trunk cable installation process for installing the split optical trunk cable in which the optical branch cable for each floor is branched in the state where the multi-storey building cabinet is finished, and the division of this lower part After the optical trunk line cable installation process, the optical property test process for the lower part of the optical branch line cable for each floor, and after the installation process of the divided optical trunk line cable for the lower part, the upper multi-story building frame is finished. The upper part of the upper split optical trunk cable is fixed to the upper part of the building frame while the lower end is connected to the upper end of the lower split optical trunk cable installed in the lower split optical trunk cable installation step. After the installation process of the split optical trunk cable and the installation process of the upper split optical trunk cable, the light of the optical branch cable for each floor of the upper split optical trunk cable Installation of optical trunk cables of the building, characterized in that it comprises an upper optical characteristic test step of performing a characteristic test. The split optical trunk cable installation process for installing the split optical trunk cable in which the optical branch cable for each floor is branched in the state where the multi-storey building cabinet is finished, and the division of this lower part After the installation process of the optical trunk cable, the optical characteristics test process of the lower part of the optical branch cable for each floor, and after the installation process of the divided optical trunk cable of the lower part, the building frame of a plurality of floors was finished. Connecting the lower end of the split optical trunk cable to the upper end of the split optical trunk cable installed on the lower floor in the state, and installing at least one intermediate split optical trunk cable installed in the building frame; The intermediate optical characteristic test process for performing optical characteristic test of the optical branch line cable for each floor of the installed intermediate split optical trunk cable at least once is sequentially performed. The intermediate installation process and the upper split optical trunk cable suspension with the suspension mounted on the upper end in the state where the uppermost multi-storey building frame is finished after installation in this intermediate installation process The upper split optical trunk cable installation step of locking the locking tool provided on the upper portion of the housing and connecting the lower end portion with the upper end portion of the intermediate split optical trunk cable installed in the intermediate installation step, and An optical trunk cable for a building including an upper optical characteristic test step for performing an optical characteristic test of an optical branch line cable for each floor of the upper divided optical trunk cable after an installation process of the upper divided optical trunk cable Installation method. 3. The method of installing an optical trunk cable in a building according to claim 1, wherein the upper part of the lower split optical trunk cable and the lower part of the upper split optical trunk cable are connected by a connector.

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