JP2007052189A - Wiring equipment of aerial optical cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide wiring equipment that facilitates wiring operation of an aerial optical cable by dividing a conventional closure into a main closure in which coated optical fibers taken out from an aerial optical cable are only distributed/stored and a plurality of sub-closures in which the coated optical fibers from the main closure are branched with a splitter and stored. <P>SOLUTION: The main closure A is installed at a required place of the aerial optical cable C stretched in aerial sections. In this main closure A, the sub-closures B in required numbers are installed in which a plurality of coated optical fibers 1 taken out from the aerial optical cable C are each distributed/stored with an extra length and in which one of the coated optical fibers 1 inside the main closure A is introduced through a connecting cable 2. In this sub-closures B, the coated optical fiber 1 so introduced is branched into a plurality by the splitter S, with the extra length stored for each branched coated optical fiber 1a, and with each fiber 1a connected to a drop cable D to be drawn into a building H side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an aerial optical cable wiring facility that performs wiring from an aerial optical cable stretched in an aerial section such as between utility poles to each house (customer) side.

  Currently, the wiring from the aerial optical cable stretched in the aerial section to each house side is performed by an optical cable connection closure. This closure is used to connect an optical cable and an optical cable, and to accommodate and protect the connecting portion and the extra length of the optical core. In this closure, the optical fiber is taken out from the aerial optical cable, connected to the splitter, connected to the drop cable, etc., but the optical fiber in the closure is congested. The situation is very difficult. In the optical wiring system, in order to increase the wiring efficiency, one optical core is branched into four using a splitter on the optical transmission source side, and further, eight branches are performed in an aerial optical cable closure. As a result, one optical fiber is branched into 32 and connected to the customer side to perform optical fiber service.

  5A is a schematic side sectional view showing a conventional optical cable connection closure 10A, and FIG. 5B is a schematic plan sectional view of FIG. In the closure 10A, the optical fiber 1 is taken out from the optical cable C, the optical fiber 1 is distributed to the storage tray T, the optical fiber 1 is connected to the splitter S, and the optical fiber exited from the splitter S. A very complicated connection such as 1 distribution (distribution to the four-layer tray T) and connection of the optical fiber 1 to the drop cable D is performed, and the optical fiber 1 is very congested. In FIGS. 5 (a) and 5 (b), reference numeral 1a denotes a branched optical fiber that exits the splitter S.

  The optical fiber 1 is connected by mechanical splicing M {cutting and bonding the optical fiber 1 (filling the gap in the optical fiber cross section with a compound to suppress loss)}. However, when the change occurred due to the convenience of the customer, it was necessary to truncate, and when this occurred, the expensive splitter itself had to be replaced. In addition, it took time and effort to pull the drop cable from the closure to each house because it was necessary to hang the drop cable between the power poles.

  The present invention was made in order to solve the above-described problems, and is equipped with a splitter for connecting a conventional optical cable connection closure, a main closure that only distributes and stores optical cores taken out from an aerial optical cable, and a splitter, The main purpose is to provide an aerial optical cable wiring facility that can be easily repaired by dividing the optical fiber from the main closure into a plurality of sub-closures that are stored by branching. And Another object of the present invention is to provide an aerial optical cable wiring facility capable of shortening the drop cable.

  Means for solving the above problems will be described with reference numerals of the embodiments described later. The invention according to claim 1 is that the main closure A is provided at a required position of the aerial optical cable C stretched in the aerial section. A plurality of optical cores 1 taken out from the aerial optical cable C are distributed and accommodated in the main closure A with an extra length, and one of the optical cores 1 in the main closure A is connected via a connection cable 2. A required number of sub-closures B to be introduced are provided, and in the sub-closure B, the introduced optical fiber 1 is branched into a plurality by a splitter S to store the extra length of each branched optical fiber 1a and It is characterized in that the optical fiber 1a is connected to a drop cable D that draws down the H side of a house or the like.

  According to a second aspect of the present invention, there is provided the overhead optical cable wiring facility according to the first aspect, wherein each branch optical fiber 1 a and the optical fiber 11 of each drop cable D can be detachably attached via the connector 8 in the sub-closure B. It is characterized by being connected to.

  According to a third aspect of the present invention, in the overhead optical cable wiring facility according to the second aspect, the sub-closure B is provided in the casing 5 having a casing body 5a and a lid body 5b for opening and closing the casing body 5a, and the casing body 5a. The cassette case 6 is constituted by being pivotally attached to the casing body 5a of the casing 5 so as to be rotatable between a storage position stored in the casing body 5a and a work position rising from the storage position. Thus, a splitter S is installed in the cassette case 6 to accommodate the extra length of each branch optical fiber 1a, and the connector 8 is mounted.

  The effect of the invention by the above-described solution means will be described with reference numerals of embodiments to be described later. According to the invention of claim 1, a main closure A is provided at a required location of the aerial optical cable C, and the main closure A A plurality of optical cores 1 taken out from the aerial optical cable C are distributed and accommodated with extra lengths, and a sub-closure B for introducing one of the optical cores 1 in the main closure A through the connection cable 2 is provided. In the sub-closure B, the required number is provided, and the optical fiber 1 introduced from the main closure A is branched into a plurality by the splitter S to accommodate the extra length of each branched optical fiber 1a, and each branched optical fiber Since it is connected to the drop cable D that pulls the wire 1a to the H side, such as a house, it is possible to avoid the congestion of the optical fiber in the closure, and to perform inspection, repair, etc. Work is performed easily, it is possible to improve the work efficiency, shorten it is possible to drop cables D drawn into the house H, thereby realizing an improvement in economic efficiency. Moreover, the sub-closure B can be attached to the most effective place, and the closures A and B and the drop cable D can be efficiently operated.

  According to the second aspect of the present invention, each sub optical fiber 1a and each optical fiber 11 of each drop cable D are detachably connected via the connector 8 in the sub-closure B. The connection work between the branch optical fiber 1a and the optical fiber 11 of each drop cable D can be facilitated, and when the customer changes, the switching work can be performed quickly and easily. The location of the failure is clarified and the responsibility for the failure is clarified, so that unnecessary trouble can be avoided. Further, wasteful replacement of the splitter due to shortening of the lead wire of the splitter by mechanical splicing can be suppressed. Further, by using the splitter S and its input / output terminal as one cassette as described above, quality can be stabilized by factory production, and the product cost can be reduced.

  According to the third aspect of the invention, the sub-closure B is constituted by the casing 5 including the casing body 5a and the lid body 5b for opening and closing the casing body 5a, and the cassette case 6 provided in the casing body 5a. 6 is pivotally attached to the casing body 5a of the casing 5 so as to be rotatable between a storage position stored in the casing body 5a and a work position rising from the storage position. Since the splitter S is installed to store the extra length of each branch optical fiber 1a and the connector 8 is mounted, the cassette case 6 is stored in the casing body 5a of the casing 5 in the storage position during normal use. Then, the casing body 5a may be closed with the lid body 5b. The opened, by rotating the cassette case 6 from the retracted position by causing rise in the working position, inspection, thereby facilitating the repair work or maintenance failure.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view for explaining an aerial optical cable wiring facility according to the present invention, and FIG. 2 shows the internal structures of a main closure A and a sub-closure B. FIG. As shown in FIGS. 1 and 2, the wiring facility of the present invention has a main closure A installed at a required location of an aerial optical cable C stretched between utility poles P, and the aerial optical cable C is installed in the main closure A. A plurality of optical fiber cores 1 taken out are distributed and accommodated with their respective extra lengths, and a required number of sub-closures B for introducing one of the optical fiber cores 1 in the main closure A through the connection cable 2 are provided. In the sub-closure B, the introduced optical fiber 1 is branched into a plurality by the splitter S, the extra length of each branched optical fiber 1a is stored, and each branched optical fiber 1a is dropped to the H side such as a house. It is configured to be connected to the cable D.

  Although the main closure A is only schematically shown in FIG. 2, for example, the main closure A is composed of a casing 3 that is openable and closable comprising a box-like casing body and a lid that opens and closes the box-like casing. A plurality of optical cores 1 taken out from the aerial optical cable C are distributed and accommodated in the main body with a sufficient extra length. The end of each optical fiber 1 accommodated in the casing 3 is appropriately connected to the optical fiber 1 of the connection cable 2 connected to the sub-closure B. Show.

  As can be seen from FIG. 3, each sub-closure B is provided in a casing 5 including a box-shaped casing body 5 a and a lid body 5 b that opens and closes the casing body 5 a, and the casing body 5 a of the casing 5. The cassette case 6 is used. The cassette case 6 is stored in the casing main body 5a (the position indicated by the solid line in FIG. 3) and the working position raised from the storage position stored in the casing main body 5a (indicated by the phantom line in FIG. 3). 2), a splitter S is installed in the cassette case 6 as shown in FIG. 2, and an extra length of each branch optical fiber 1a is provided. It comes to store.

  As shown in FIG. 2, a splitter S is installed at the center of one side in the cassette case 6, and connectors 7 and 8 are arranged at regular intervals on the other side. The cassette case 6 is held and fixed to the bottom surface of the casing body 5a of the casing 5 by detachable cassette holders a and b at the storage position indicated by the solid line in FIGS. By removing a and b, it is possible to rotate to the working position indicated by the phantom line in FIG. Nine connectors 7 and 8 are disposed in the cassette case 6.

  In connecting and wiring the main closure A and one sub-closure B, first, one of the optical cores 1 accommodated in the main closure A is connected to one end of the connection cable 2 having a required length. (The connection portion is indicated by 4 in FIG. 2), the leading end portion of the connection cable 2 is drawn into the sub-closure B to a required length, and the covering portion of the drawing portion of the cable 2 is removed and exposed. The tip of the optical fiber 1 is connected to one of the connectors 7 provided in the cassette case 6 (in FIG. 2, the connector 7 positioned on the uppermost side of the nine connectors 7, 8). The connectors 7 and the splitter S are connected by the same optical fiber 1.

  The splitter S splits the light from the optical fiber that has entered from the input side end portion into a plurality of branches, and in this embodiment, the splitter S is split into eight. As shown in FIG. 2, one end of each of the eight branched optical cores 1a for transmitting the eight branched light beams is connected and wired to the output side end of the splitter S. The other end of the branched optical fiber 1 a is connected to the remaining eight connectors 8 of the nine connectors 7, 8 inside the cassette case 6. Further, these eight connectors 8 are connected to one end portion of the optical core 11 of the drop cable D as shown in FIG.

  In FIGS. 2 and 3, a fixing portion for fixing the distal end portion of the connection cable 2 drawn from the main closure A into the sub-closure B to the casing body 5a of the sub-closure B is indicated by 9, and from the sub-closure B Reference numeral 10 denotes a fixing portion for fixing the optical fiber 11 of the drop cable D drawn into the house or the like to the H side to the casing body 5a.

  A sub-closure B shown in FIG. 2 is an example of a vertical sub-closure in which a cassette case 6 is inserted and arranged in a vertically long casing 5 in a vertical direction. FIG. 4 shows a cassette case 6 in a horizontally long casing 5. The embodiment of the horizontal type sub-closure B in which is inserted and deployed horizontally is shown. The horizontal sub-closure B shown in FIG. 4 has a casing 5 in a horizontally long shape, and the cassette case 6 inserted into the casing 5 and its wiring structure are inserted into the vertically long casing 5. The cassette case 6 can be used in either a vertical type or a horizontal type.

  Further, as shown in FIG. 1, the sub-closure B may be attached to the utility pole P or attached to the optical cable C. In the case of the utility pole P, the casing body 5a of the casing 5 is used with an appropriate mounting bracket or the like. In the case of the optical cable C, as shown schematically in FIG. 1, an appropriate hanger member 12 is attached to the upper end of the casing body 5a, and the hanger member 12 is attached to the optical cable C or Just hang it around the messenger wire.

  In the wiring facility of the embodiment shown in FIG. 1, a main closure A is installed at a required position of an aerial optical cable C stretched between utility poles P, and four lights taken out from the aerial optical cable C are placed in the main closure A. The core 1 is distributed and accommodated, and one of the optical cores 1 in the main closure A is introduced into the sub-closure B attached to the utility pole P shown on the left side of FIG. In this sub-closure B, one of the branched optical cores 1a... Branched into, for example, eight by the splitter S is drawn down to the house H via the drop cable D, and the other one in the main closure A. 1 is introduced into the sub-closure B attached to the power pole P shown on the right side of FIG. 1 via the connection cable 2 and one of the branched optical cores 1a... Branched in the sub-closure B is dropped. Then, the other two in the main closure A are introduced into the two sub-closures B and B attached to the aerial optical cable C through the connection cable 2, respectively. An example in which one of the branched optical fibers 1a... In the sub-closure B is pulled down to the house H by the drop cable D is shown.

  According to the wiring facility of the present invention as described above, the main closure A is installed at a required location of the overhead optical cable C, and a plurality of optical cores 1 taken out from the overhead optical cable C are respectively stored in the main closure A. A required number of sub-closures B for distributing and accommodating the length and introducing one of the optical cores 1 in the main closure A through the connection cable 2 are provided, and introduced from the main closure A in the sub-closure B. The split optical fiber 1 is branched into a plurality by the splitter S so as to accommodate the extra length of each branched optical fiber 1a, and connected to a drop cable D that draws each branched optical fiber 1a to the H side such as a house. Therefore, it is possible to avoid the congestion of the optical fiber in the closure, to easily carry out work such as repair, and to improve the work efficiency. It is possible to shorten the drop cable D to draw a house H, thereby realizing an improvement in economic efficiency. Further, the sub-closure B can be attached to the most effective place, and the closures A and B and the drop cable D can be efficiently operated.

  In addition, according to this wiring facility, each branch optical fiber 1a and each optical fiber 11 of each drop cable D are detachably connected via the connector 8 in the sub-closure B. The connection work between the optical fiber 1a and the optical fiber 11 of each drop cable D becomes easy, especially when the customer changes, the switching work can be performed quickly and easily. As well as clarifying whereabouts and the sharing of responsibility for failure, it is possible to avoid the occurrence of unnecessary troubles. Furthermore, wasteful replacement of the splitter due to shortening of the lead wire of the splitter by mechanical splicing can be suppressed.

  Further, in this wiring facility, the sub-closure B is configured by a casing 5 including a casing body 5a and a lid body 5b for opening and closing the casing body 5a, and a cassette case 6 provided in the casing body 5a. The casing 5 is pivotally attached to the casing body 5a of the casing 5 so as to be rotatable between a storage position stored in the casing body 5a and a work position rising from the storage position. Since it is installed to store the extra length of each branch optical fiber 1a and the connector 8 is mounted, the cassette case 6 is stored in the casing body 5a of the casing 5 in the storage position during normal use. The casing body 5a may be closed with the lid body 5b, and at the time of work, as shown in FIG. It opened 5 of the lid 5b, and rotate the cassette case 6 from the retracted position by causing rise in the working position, as shown in phantom lines shown in the figure, inspection, thereby facilitating the repair work or maintenance failure.

  Further, by using the splitter S and its input / output terminal as one cassette as described above, quality can be stabilized by factory production, and the product cost can be reduced.

It is explanatory drawing explaining the wiring installation of the aerial optical cable which concerns on this invention. It is a top view which shows the internal structure of a main closure and a sub-closure, Comprising: A sub-closure shows the example of the vertical sub-closure which inserted and arranged the cassette case vertically in the vertically long casing. It is a perspective view explaining the rotation operation of a cassette case by opening the casing of the sub-closure. It is a top view which shows the example of the horizontal type subclosure which inserted and arranged the cassette case horizontally in the horizontally long casing. (a) is a schematic side sectional view showing a conventional optical cable closure, and (b) is a schematic plan sectional view of (a).

Explanation of symbols

A Main closure B Sub-closure C Overhead optical cable D Drop cable H House P Utility pole S Splitter 1 Optical core 1a Branch optical core 2 Connection cable 3 Main closure casing 5 Sub-closure casing 5a Casing body 5b Lid 6 Cassette case 7,8 Connector 11 Optical fiber of drop cable

Claims (3)

  A main closure is installed at the required location of the aerial optical cable stretched in the aerial section, and a plurality of optical cores taken out from the aerial optical cable are distributed and accommodated in the main closure with respective extra lengths. The required number of sub-closures that introduce one of these via a connection cable is provided, and the introduced optical cores are branched into a plurality of splitters within the sub-closure to store the extra length of each branch optical core. In addition, an aerial optical cable wiring facility that is connected to a drop cable that draws each branch optical fiber to a house or the like.   The aerial optical cable wiring facility according to claim 1, wherein each branch optical fiber and each optical fiber of each drop cable are detachably connected in the sub-closure via a connector. The sub-closure includes a casing including a casing main body and a lid body that opens and closes the casing, and a cassette case equipped in the casing main body. The cassette case is stored in the casing main body and the storage position. It is pivotally attached to the casing body of the casing so as to be rotatable over the working position where it rises from, and in this cassette case, a splitter is installed to store the extra length of each branch optical fiber and the connector. The overhead optical cable wiring facility according to claim 2, which is attached.

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