JP2000089040A - Optical wiring housing unit - Google Patents

Abstract

(57) [Problem] To provide an optical switch accommodating unit that collectively accommodates an optical switch and an optical coupler to unitize the optical switch and achieve quicker installation work of the optical switch. The purpose is to provide. SOLUTION: An optical wiring housing unit 1 according to the present invention comprises:
The optical coupler 6 provided in the middle of the optical cord 12 is fixed, and a plurality of optical component boards 8 arranged in parallel and a plurality of optical branch cores G connected to the optical coupler 6 are
Optical switch 9 for selectively optically connecting optical fiber 9b
And an optical switch housing box 10 for collectively housing a plurality of optical component boards 8 and optical switches 9, and an optical cord 1 partially derived from the optical switch housing box 10.
2 and the multi-core optical fiber 3 extending from the first side optical cable 2 are connected via optical connectors 13 and 14,
At the same time as the optical connectors 13 and 14 are accommodated, the optical cord 12 and the multi-core optical fiber 3 extending from the optical connectors 13 and 14 are provided.
And an extra-length storage tray 16 that accommodates the extra length of the optical switch and is loaded on the optical switch storage box 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber housing unit for use in connecting an optical connector between an optical cable on one side (for example, a subscriber side) and an optical cable on the other side (for example, an office side) in an optical fiber network. It is about.

[0002]

2. Description of the Related Art Conventionally, as a technique in such a field, there is JP-A-9-197138. The optical cable connection module described in this publication is an optical termination (FTM)
Each module is assembled in the optical termination frame with an individual insertion / removal configuration, and a maximum of 250 modules are planned to be accommodated in the optical termination frame. The front part of the module has a vertically drawable two-stage module body, and the rear part of the module has a space for accommodating optical components such as an optical coupler and an optical filter. As described above, the optical cable connection module separates the module main body used for connector connection and the space for accommodating the optical component. Therefore, at the time of switching the optical connection, only the module main body can be pulled out and only the optical connector inside the module main body can be taken out. be able to. Also, Japanese Patent Application Laid-Open No. 9-553
No. 3 discloses an optical cable connection device, in which an optical connector housing case is arranged below a plurality of optical branching modules housing optical components such as an optical coupler. Therefore, when taking out a desired optical connector from the optical connector housing case at the time of switching the optical connection,
The operator's hands do not touch the optical components, preventing the optical components from being damaged properly

[0003]

However, the above-mentioned conventional optical wiring housing unit has the following problems. That is, the above-mentioned Japanese Patent Application Laid-Open No. Hei 9-19713
No. 8 and JP-A-9-5533 disclose an optical coupler in the middle of connection between an optical cable on one side (for example, a subscriber side) and an optical cable on the other side (for example, an office side). Is an optical component that enables branch connection to an optical switch. The optical branching cable extending from the optical coupler and the optical switch need to be connected, but the installation of the optical switch at the site takes time, and it is difficult to improve the efficiency of the operation. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. In particular, the present invention has been made so that an optical switch and an optical coupler are collectively housed to unitize the optical switch, thereby speeding up the work of installing the optical switch. It is an object of the present invention to provide an optical wiring housing unit that achieves the above.

[0005]

According to a first aspect of the present invention, there is provided an optical wiring housing unit comprising a multi-core optical fiber extending from an optical cable on a first side and a single-core optical fiber extending from an optical cable on a second side. An optical wiring storage unit for connecting via a plurality of connection optical cords, wherein an optical coupler provided in the middle of the optical cord is fixed, and a plurality of optical component boards arranged in parallel, An optical switch for selectively optically connecting an optical fiber to a plurality of optical branch wires connected to the coupler, an optical switch housing box for collectively housing a plurality of optical component boards and the optical switch,
The tip of the optical cord, part of which is led out of the optical switch housing box, and the multi-core optical fiber extending from the optical cable on the first side are connected via the optical connector. An extra-length storage tray is provided for storing the extra length of the extended optical cord and the multi-core optical fiber and for loading the extra length in the optical switch accommodation box.

An optical coupler is arranged in the middle of connection between an optical cable on one side (for example, a subscriber side) and an optical cable on the other side (for example, an office side). This optical coupler is an optical coupler that enables branch connection to an optical switch. Parts. Therefore, the optical coupler is fixed to the optical component board, the optical branch cable extending from the optical coupler is connected to the optical switch, and the optical switch and the optical component board are collectively housed in one optical switch housing box. Thus, the unitization of the optical switch has been achieved. Therefore, when installing the optical switch on site, there is no need to perform a work of connecting the optical branch and the optical branch cable extending from the optical coupler, and the handling of the optical switch becomes extremely easy. In addition, the extra length storage tray accommodates the optical connector and at the same time accommodates the extra length of the optical cord and the multi-core optical fiber extending from the optical connector. The connection switching operation using the optical connector can be reliably performed without touching the component board. Further, by stacking such extra-length storage trays in the optical switch storage box, it becomes possible to provide an optical wiring storage unit that facilitates the installation work of the optical switch and the optical connection switching work.

In the optical wiring accommodating unit according to the present invention, the optical switch accommodating box has an optical branch core extra length accommodating portion for accommodating an extra length of the optical branch core, and the optical branch core extra. It is preferable to provide an optical connector part in the middle of the optical branch cable in the long housing part. In this case, when the optical switch breaks down for some reason, the optical connector section in the extra length of the optical branch cable may cut off the middle of the optical branch cable connecting between the optical switch and the optical component board. it can. Therefore, even in the case where the optical switch needs to be repaired or replaced, a simple operation of cutting the optical branch cable by the optical connector can be performed, and the optical switch can be easily taken out of the optical switch housing box.

According to a third aspect of the present invention, in the optical wiring housing unit, the optical switch housing box has an optical branch core excess length accommodation portion for accommodating the extra length of the optical branch core. It is preferable to provide a fusion splicing part in the middle of the optical branch cable in the long housing part. In this case, when the optical switch fails for some reason, the middle of the optical branch cable connecting the optical switch and the optical component board is cut before and after the fusion splicing portion in the extra length of the optical branch core housing. Can be easily cut. Therefore, even when the optical switch needs to be repaired or replaced, an extremely simple operation of cutting the optical branch cable can be performed, and the optical switch can be easily taken out of the optical switch housing box.

In the optical wiring accommodating unit according to the fourth aspect, it is preferable that one optical coupler is fixed to each optical component board. When such a configuration is adopted,
It is possible to manage the number of optical branch cores derived from the optical coupler for each optical component board, thereby facilitating the wiring work when connecting the optical branch core to the optical switch.

[0010] In the optical wiring accommodating unit according to the fifth aspect, each optical component board is inserted and inserted into a plurality of slit grooves provided in the optical switch accommodating box, and stands in parallel in the optical switch accommodating box. It is preferable to provide them. When such a configuration is employed, each optical component board can be inserted into the optical switch housing box by inserting work, and the work at the time of assembling the optical wiring housing unit is made more efficient.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a preferred embodiment of an optical wiring accommodating unit according to the present invention.

FIG. 1 is a perspective view showing an optical wiring accommodating unit according to the present invention, and FIG. 2 is a schematic diagram showing a connection state of each component in the optical wiring accommodating unit. The optical wiring housing unit 1 shown in these drawings is intended to be installed in an optical wiring module (FTM) which is an example of an optical termination. The optical wiring housing unit 1 includes a number of multi-core optical fibers (hereinafter, referred to as “tape fibers”) 3 derived from an optical cable 2 on the subscriber side (first side),
This is a unit for connecting a large number of single-core optical fibers 5 derived from the optical cable 4 on the office side (second side) in correspondence with each other.

As shown in FIGS. 1 and 2, the optical wiring housing unit 1 has an optical coupler 7 fixed to the surface thereof with an adhesive or a housing of the optical coupler 7 mechanically fixed to the surface with screws or the like. An optical switch housing box 1 collectively housing a component board 8 and an optical switch 9 as a core wire selecting means.
It has 0. An optical component board 8 is accommodated on the rear side of the optical switch accommodating box 10 so as to stand in parallel. As shown in FIG. 2, an adapter C for inserting an optical connector 11 provided at the end of each single-core optical fiber 5 of the optical cable 4 is fixed to a rear end 8 b of each optical component board 8. . Each optical component board 8 has four single-core optical cords 12 extending from the adapter section C, and each optical cord 12 is led out from the front end 8a of the optical component board 8 to the outside. Each of the optical cords 12 derived from the optical component board 8 is collectively placed in the first optical connector (M
T connector 13). Therefore, one optical component board 8 has one optical connector 13, and the first optical connectors 13 corresponding to the number of optical component boards 8 (for example, 50) exist.

Further, an optical coupler 6 and an optical filter 7 are provided in the middle of the optical cord 12 arranged so as to crawl on the surface of each optical component board 8. These optical components 6 and 7 are fixed to the surface of the optical component board 8 via physical fixing means such as an adhesive or mechanical fixing means such as screws, and provided on one optical component board 8. From one optical coupler 6, a plurality of (for example, eight for four optical cords 12) optical branching cores G are led out. As shown in FIGS. 1 and 3, each of the optical component boards 8 configured as described above can be inserted through an opening 10 a provided on the back side of the optical switch housing box 10.

Specifically, the optical switch housing box 10
The upper slit groove 23a that allows the optical component board 8 to be inserted into each inner wall surface of the upper plate 10b and the lower plate 10c.
And a lower slit groove 23b are provided, and the optical component board 8 is erected in the optical switch housing box 10 by the pair of upper and lower slit grooves 23a and 23b. Also,
Each slit groove 23a, 23b is formed as a straight groove from the opening 10a side to the back side so as to enable insertion from the back side of the optical switch housing box 10, and furthermore, each light groove having the same configuration. In order to allow the component boards 8 to be inserted, they are arranged side by side in a line at equal intervals. The width of the slit grooves 23a and 23b may be substantially the same as the width of the optical component board 8, and the fitting gap may be eliminated to prevent the optical component board 8 from falling off. And slit grooves 23a, 23b
A concave and convex fitting portion may be provided on the wall surface of the optical component board to prevent the optical component board 8 from being pulled out.

Here, as shown in FIG. 2, each optical branch cable G led out from each optical coupler 6 is guided into a case 9A of the optical switch 9 via an optical connector 19 to be described later. The optical fibers 9 are aligned and fixed in a line on the optical fiber array 9a. Accordingly, on the optical fiber array 9a made of zirconia fixed to the case 9A, a large number of optical branch wires G derived from each optical coupler 6 are arranged in a line.

In the case 9A of the optical switch 9,
One or two optical fibers 9b on the master side are housed. The optical fibers 9b are moved in the direction of the arrow along the longitudinal direction of the optical fiber array 9a by a horizontal driving mechanism (for example, a ball bearing driven by a motor) (not shown). The core wire is selectively moved, and the tip of the optical fiber 9b performs a swing operation for achieving contact / separation with the optical fiber array 9a by a switch mechanism (not shown) (for example, a swinging mechanism using a leaf spring). Therefore, based on the above-described mechanism, the optical fiber 9b on the master side can be selectively optically connected to a number of optical branch wires G arranged on the optical fiber array 9a. The optical switch 9 having such a configuration is housed in the optical switch housing box 10 together with the optical component board 8. The optical fiber 9b is
It is connected to a measuring device K such as OTDR, and its use is achieved.

As described above, the optical coupler 6 is fixed to the surface of the optical component board 8, and the optical branch core G extending from the optical coupler 6 is connected to the optical switch 9. 8 are collectively housed in one optical switch housing box 10 to achieve unitization of the optical switch 9.

The optical switch 9 in this case is housed in a pull-out optical switch tray 18 as shown in FIG. 4, and this optical switch tray 18 is arranged at the front of the optical switch housing box 10, and The guide rail 20a and the guide groove 20b cooperate to be able to be pulled out. Each optical branch cable G connecting the optical switch 9 and the optical component board 8 is routed inside the optical switch housing box 10, and the optical connector section 1 is provided in the middle of each optical branch cable G.
9 are provided, and each optical connector section 19 is provided with an optical component board 8.
Optical connector 19a provided on the side optical branch core G
And a second optical connector 19b provided on the optical branch cable G on the optical switch 9 side. The optical switch 9 and the optical switch 9 are connected to and detached from the first optical connector 19a and the second optical connector 19b. Connection / separation from the component board 8 is achieved.

In the optical switch tray 18,
Above the optical switch 9, a surplus shelf 21 for accommodating the surplus portion of the optical branch core G is arranged. The extra length shelf 21 is placed so as to be mounted on the optical switch 9, and forms an optical branch core extra length accommodation portion 21 a on the upper surface of the extra length shelf 21.
The light branch core excess length storage portion 21a is formed as a flat surface. Optical branch core extra length storage unit 2 of extra length shelf 21
A box-shaped optical connector accommodating portion 22 for accommodating each optical connector portion 19 is fixed to 1a.

Therefore, the extracted optical switch tray 1
When the optical switch 9 is mounted in the optical switch 8, as shown in FIG.
The extra length shelf 21 is put on the optical switch 9 while being led out from the one core wire outlet 21b. After that, the optical branching cable G led out from the cable outlet 21b is inserted into the extra length shelf 2.
Crawl around on the upper surface (light branching cord extra length accommodating portion) 21a of 1
The upper surface 2 of the extra length shelf 21 is set so that the optical branching cable G on the optical component board 8 side is along the partition plate 21 c on the extra length shelf 21.
Crawl in a U-shape at 1a. Then, the first optical connector 1
9a and the second optical connector 19b are connected,
Each optical connector section 19 is sequentially accommodated in the optical connector accommodating section 22. In this way, the connection work between the optical switch 9 and the optical component board 8 via the optical branching cable G is completed.

If the optical switch 9 fails for some reason, it is necessary to replace / repair the optical switch 9.
First, each optical connector section 19 is taken out from the optical connector accommodating section 22, the connection between the first optical connector 19a and the second optical connector 19b is released, and the optical switch 9 and the optical component board 8 are separated. Then, the extra length shelf 21 is taken out of the optical switch tray 18 and the optical switch 9 is set in a free state in the optical switch tray 18, so that the optical switch 9 is easily taken out of the optical switch storage box 10.

Here, as shown in FIG. 1 and FIG. 2, each first optical connector (M
Each of the second optical connectors (M connectors) 13 is provided at the tip of the tape fiber 3 of the optical cable 2 on the subscriber side.
The connector 14 is connected to the outside of the optical switch housing box 10 via a guide pin (not shown).
The reason why the optical connection between the first optical connector 13 and the second optical connector 14 is performed outside the box 10 is that the connection switching work between the optical connectors 13 and 14 is simplified and the connection switching is performed. This is to prevent the optical components 6 and 7 in the optical component board 8 from being touched by the operator's hand during the operation, thereby avoiding damage to the optical components 6 and 7 in the optical component board 8.

Thus, the first optical connector 13 and the second
Since the optical connection unit 15 including the optical connector 14 is outside the optical switch housing box 10, the optical wiring housing unit 1 has the extra length storage tray 16 for collectively housing the many optical connectors 13 and 14. I have two. The extra length storage trays 16 are stacked in the optical switch storage box 10 so as to be stacked in two stages in front of the optical component board 8. Each extra-length storage tray 16 is configured to be able to be pulled out from the optical switch storage box 10, and specifically, includes a guide rail 17 a and a guide groove 17 b.
It is configured to be able to be pulled out freely in cooperation with.

Further, half of the total number of the optical connection units 15 is stored in the extra length storage tray 16 on the upper side,
The other half is shared and stored in the extra length storage tray 16 on the lower side. For example, in the case where there are 50 optical component boards 8, 25 optical connection units 15
Are arranged in a horizontal row in two stages. Each extra length storage tray 16 not only accommodates the optical connectors 13 and 14, but also has a waveform indicating the extra length of the optical cord 12 extending from the optical connector 13 and the extra length of the tape fiber 3 extending from the optical connector 14. It is housed in. In this case, the tape fiber 3 is inserted from an optical fiber insertion hole 16a provided on one side wall of the extra length storage tray 16, and the optical cord 12 is inserted.
Is inserted through an optical cord insertion hole 16b provided on the other side wall of the extra length storage tray 16. A cover plate 18 for protecting the inside of the extra-length storage tray 16 on the upper side is fixed to the upper surface of the optical switch storage box 10 with screws or the like.

The present invention is not limited to the above-described embodiment. For example, as shown in FIG. The connection part 25 is located on the upper surface of the extra-shelf shelf 21 (the extra-length optical branching cord storage part).
It is stored so as to be fitted into the slit-like insertion groove 26a of the fusion splicing portion accommodating portion 26 provided in the 21a. In this case, if the optical switch 9 fails for some reason,
The optical branch wire G is cut by a cutter or the like before and after the fusion splicing portion housing portion 26. Also, after removing each fusion splicing portion 25 from the fusion splicing portion housing portion 26, as shown by the broken line, the fusion splicing portion 2
The optical branch wire G may be cut at a cut point A before and after the block 5.

Further, as shown in FIG.
May be inserted into the optical switch housing box 10 from above. In this case, at the rear part of the optical switch housing box 10, the front partition plate 27 and the rear partition plate 28 are opposed to each other and are erected in parallel. Then, slit grooves 27a and 28a extending in the vertical direction are formed on the inner wall surfaces of the respective partition plates 27 and 28, and the optical component board 8 falls down so as to sandwich the optical component board 8 between the pair of front and rear slit grooves 27a and 28a. To prevent At the lower end of the optical component board 8, a cutout portion 29 that allows the optical cord 12 to be discharged is formed, and the cutout portion 2 of each optical component board 8 is formed.
By forming 9, a discharge path for the optical code 12 is secured. Therefore, along the bottom plate 29, the optical cord 12
And the optical branching cable G can be flushed out in the lateral direction.

[0028]

The optical wiring accommodating unit according to the present invention is constructed as described above, so that the following effects can be obtained. That is, an optical wiring housing unit for connecting a multi-core optical fiber extending from the first-side optical cable and a single-core optical fiber extending from the second-side optical cable via a plurality of connection optical cords, The optical coupler provided in the middle of the optical cord is fixed, and the optical fiber is selectively applied to the plurality of optical component boards arranged in parallel and the plurality of optical branch wires connected to the optical coupler. An optical switch to be optically connected, an optical switch housing box for collectively housing a plurality of optical component boards and an optical switch, an end of an optical cord partially derived from the optical switch housing box, and a first side The multi-core optical fiber extending from the optical cable is connected via an optical connector to accommodate the optical connector, and at the same time, the excess length of the optical cord extending from the optical connector and the multi-core optical fiber is collected. And the extra-length storage tray to be loaded in the optical switch storage box, the optical switch and the optical coupler are collectively stored to unitize the optical switch, and the installation work of the optical switch can be speeded up. Becomes

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of an optical wiring housing unit according to the present invention.

FIG. 2 is a schematic diagram showing a connection state in the optical wiring housing unit shown in FIG.

FIG. 3 is a cross-sectional view showing a first means when the respective optical component boards are juxtaposed in an optical switch housing box.

FIG. 4 is a perspective view showing a state where an optical connector portion provided in the middle of the optical branch cable is taken out of the optical switch tray.

FIG. 5 is a perspective view showing a state where an optical switch tray is pulled out from an optical switch housing box.

FIG. 6 is a perspective view showing a state in which a fusion splicing part provided in the middle of the optical branch cable is taken out of the optical switch tray.

FIG. 7 is a perspective view showing a second means when the respective optical component boards are juxtaposed in the optical switch housing box.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical wiring accommodation unit, 2 ... First side optical cable, 3
... Tape fiber (multi-core optical fiber), 4 ... Second side optical cable, 5 ... Single core optical fiber, 6 ... Optical coupler (optical component), 8 ... Optical component board, 9 ... Optical switch, 9b ... Master side light Fiber (optical fiber), 10: optical switch storage box, 12: optical cord, 13: first optical connector (optical connector), 14: second optical connector (optical connector), 16: extra length storage tray, 19 ... Optical connector part, 2
1a: Optical branching cord extra length accommodation section, 23a, 23b, 27
a, 28a: slit groove, 25: fusion spliced part, G: optical branch core.

Claims (5)

[Claims] An optical wiring housing unit for connecting a multi-core optical fiber extending from a first-side optical cable and a single-core optical fiber extending from a second-side optical cable via a plurality of connection optical cords. Fixing an optical coupler provided in the middle of the optical cord, a plurality of optical component boards arranged in parallel, and a plurality of optical branch cores connected to the optical coupler, An optical switch for selectively optically connecting fibers, an optical switch housing box for collectively housing the plurality of optical component boards and the optical switch, and a part of which is led out of the optical switch housing box. The tip of the optical cord and the multi-core optical fiber extending from the optical cable on the first side are connected via an optical connector. The light codes and to also accommodate the surplus length of the multi-core optical fiber, optical interconnection receiving unit, characterized in that a surplus length receiving tray to be stacked on the optical switch housing box extending. 2. An optical switch accommodation box includes an optical branch extra length accommodation section for accommodating the extra length of the optical branch core, and the optical branch in the extra optical branch core accommodation section. 2. The optical connector according to claim 1, wherein an optical connector is provided in the middle of the core wire.
The optical wiring housing unit as described in the above. 3. An optical switch accommodation box includes an optical branch extra length accommodation section for accommodating an extra length of the optical branch optical fiber, and the optical branch inside the extra optical branch optical fiber accommodation section. 2. The optical wiring housing unit according to claim 1, wherein a fusion splicing part is provided in the middle of the core wire. 4. The optical coupler according to claim 1, wherein one optical coupler is fixed to each optical component board.
The optical wiring housing unit according to any one of claims 3 to 3. 5. The optical component board according to claim 1, wherein each of the optical component boards is inserted and inserted into a plurality of slit grooves provided in the optical switch storage box, and is erected in parallel in the optical switch storage box. The optical wiring accommodation unit according to any one of claims 1 to 4.