JPH1123865A - Optical fiber cable wiring board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the operability when cable connecting operation and cable detaching operation are performed by drawing a fusion tray and a connector tray out. SOLUTION: On the top surface of a tray 16a between a clamp 33 and a hold part 32, an optical fiber array tool 34 is fixed. This optical fiber array tool 34 is formed of elastic soft resin and has comb-shaped grooves. The width of each groove is set a little smaller than the width of an optical fiber cord. Therefore, optical fiber cords 12a, 12b... and optical fiber cords 19a, 10b... are pressed in those grooves. Consequently, even when the clamp 33 is opened, the optical fiber cords 12a, 12b... and optical fiber cords 19a, 19b... do not move freely unlike before since they are held by being pressed in the optical fiber array tool 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber cable distribution board provided with a tray to which a plurality of arbitrary optical fiber cables are connected.

[0002]

2. Description of the Related Art Conventionally, as an optical fiber cable distribution board of this kind, for example, an intermediate distribution frame (IDF) for connecting a line-side optical fiber cable outside the office to an apparatus-side optical fiber cable inside the office. There is. The optical IDF board is usually provided with a plurality of fusion tray units, a plurality of line side connector tray units, and a plurality of device side connector tray units.

In order to guide the line-side optical fiber cable outside the station to the line-side connector tray, the end of the line-side optical fiber cable is once fused to the end of an optical fiber cord with a single-end connector. The fusion splicing section is accommodated in the fusion tray. After that, the other end of the optical fiber cord to which the connector is attached is connected to the adapter in the line side connector tray.

[0004] Adapters in the device side connector tray include:
Optical fiber cords connected to various optical devices in the office are connected by connectors. These intra-station optical devices are connected to a line-side optical fiber cable outside the station by connecting the adapters in the connector trays on the line side and the device side with optical fiber cords with connectors at both ends. Switching can be made between the adapters by exchanging optical fiber cords with connectors at both ends, and any intra-office optical device can be connected to any out-of-office optical fiber cable.

FIG. 5 is a perspective view showing the fusing tray 1 described above.

Line-side optical fiber cords 2a to 2a
Each end of 2d is fusion-spliced to each end of optical fiber cords 3a to 3d with single-end connectors. Each of the fusion splicing portions is inserted into the fusion reinforcing tube 4 and pressed into the holding portion 5. A thin stainless steel rod is inserted into the reinforcing tube 4 so that a bending force is not applied to the optical fiber cable at the fusion splicing portion.

[0007] Further, a clamp 6 which is a bundling device for bundling optical fiber cords is provided in the optical fiber cord lead-in portion of the tray 1. Each optical fiber cord 2a to 2d
The optical fiber cords 3a to 3d are wound in an annular shape and subjected to extra length processing, and are bundled by the clamps 6 at the respective retracted portions at both ends. The clamp 6 has latch portions 6a and 6b formed at its ends.
When the a and 6b are engaged, the open end of the clamp 6 is closed.

The line side connector tray and the apparatus side connector tray have the same configuration as the fusion tray 1 except that the fusion splicing part is replaced with a connector connection. In other words, an adapter into which a plug of an optical connector is inserted is provided in the cord connection portion instead of the holding portion 5, and a clamp for bundling the optical fiber cord which has been subjected to the extra length processing is similarly provided in the cable drawing portion of the tray. Attached to.

[0009]

However, in the above-mentioned conventional optical fiber cable distribution board, when pulling out a fusion tray or each connector tray and performing a cable connecting operation or a cable removing operation, a clamp for binding each optical fiber cord is used. When opened, each fiber optic cord breaks apart. For example, in the fusion tray 1, when the latches 6a and 6b are disengaged and the clamp 6 is opened,
Each optical fiber cord 2a to 2d, each optical fiber cord 3
a to 3d fall apart because the restraint is lost.

For this reason, when the optical fiber cords are fusion-spliced or connected to each other by a connector, the optical fiber cords move without being fixed, so that the workability of connecting and disconnecting the optical fiber cables is good. Did not.

Further, when the optical fiber cords are scattered, it becomes impossible to distinguish between the optical fiber cords, and it is not possible to easily identify the optical fiber cord to be worked.

[0012] Further, when the optical fiber cord is to be pulled out by pulling the optical fiber cord in order to identify the optical fiber cord when the optical fiber cord is removed from the tray, for example, the optical fiber cord which is not to be worked is pulled. As a result, the connection of other optical fiber cords may be adversely affected.

[0013] Further, when the clamp is opened for connection work of the optical fiber cord, the optical fiber cord may fall off the tray.

[0014]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an optical fiber cable distribution board having a tray to which a plurality of arbitrary optical fiber cables are connected is provided. An optical fiber aligning tool for aligning and holding the optical fiber cords by press-fitting the optical fiber cords into the plurality of toothed grooves is provided on the tray.

According to this configuration, even when the bundle is opened, the optical fiber cord is pressed and held in the optical fiber aligning tool, so that it does not float as in the related art.

Further, since the optical fiber cords are kept aligned by the optical fiber aligner, it is easy to distinguish the optical fiber cords from each other.

Further, even if the optical fiber cord is sandwiched between the bundles for binding the optical fiber cords provided in the optical fiber draw-in portion of the tray, the optical fiber cords are similarly pressed into the optical fiber sorter. It is kept aligned.

[0018]

Next, a description will be given of a first embodiment in which the optical fiber cable distribution board according to the present invention is applied to an optical IDF board.

FIG. 4 shows a schematic configuration of the optical IDF board.

A multi-core, for example, 128-core line-side optical fiber cable 12 is led into a station 11 of a communication carrier such as an outdoor cubicle or a telecommunication room. The optical fiber cable 12 is guided to an optical IDF board 13 installed in the station building 11, and further distributed and connected to each optical device via a transmission device frame 15 having an optical transmission module 14.

In the optical IDF board 13, a fusion tray unit 16, a line side connector tray unit 17 and an apparatus side connector tray unit 18 are provided. An end of any one optical fiber cord 12a in the multi-core optical fiber cable 12 is connected to an optical cord 19 with a one-end connector.
Is fusion-spliced. This fusion splicing part is housed in the fusion tray 16a.

A plug is attached to the other end of the optical fiber cord 19 with one end connector, and the plug is connected to the adapter 2 provided in the line side connector tray 17a.
0 is inserted at one end. A plug attached to one end of an optical fiber cord 21 with a connector at both ends is inserted into the other end of the adapter 20, and the optical fiber cords 19 and 21 are connected by an optical connector.

The plug attached to the other end of the optical fiber cord 21 is inserted into one end of an adapter 22 provided in the apparatus side connector tray 18a. A plug attached to one end of an optical fiber cable 23 with a connector at both ends is inserted into the other end of the adapter 22 so that the optical fiber cord 21 is connected to the optical fiber cable 2.
3 is connected. The optical fiber cable 23 is connected to the optical transmission module 14 in the transmission device rack 15.

In addition to the optical fiber cable 12a, any number of optical fiber cables in the multi-core optical fiber cable 12 can be connected to the line side connector tray unit via the fusion tray unit 16 in the same manner as described above. Each of the adapters 17 is connected to an optical fiber cord 19 with a single-end connector. Each optical transmission module 14 in the transmission device rack 15 is connected to each adapter 22 of the device-side connector tray unit 18 by an optical fiber cable 23 with connectors at both ends. Therefore, by connecting any adapter 20 and any adapter 22 with the optical fiber cord 21 with connectors on both ends, any line-side optical fiber cable 12 can be connected to any optical transmission module 14.

FIG. 1 is an enlarged perspective view showing the fusion tray 16a. The fusion tray 16a is formed by bending an aluminum plate into a box shape.

Each end of the arbitrary optical fiber cords 12a, 12b,... In the multi-core optical fiber cable 12 is connected to an optical fiber cord 19a, 19
are fusion-spliced to each end of b,. Each fusion splicing part is inserted into a fusion reinforcing tube 31 into which a thin stainless steel rod is inserted, and is press-fitted into a holding part 32. The holding portion 32 is made of a rubber member having a comb-shaped groove, and is attached to a substantially central portion of the tray 16a with a double-sided adhesive tape. The width of each groove is slightly smaller than the diameter of the reinforcing tube 31.

Further, a clamp 33 for bundling the optical fiber cords is provided in the optical fiber cord lead-in portion of the tray 16a.
Is attached with double-sided adhesive tape. Each optical fiber cord 12a, 12b,... And each optical fiber cord 1
, 9a, 19b,... Are wound in an annular shape and subjected to extra length processing, and are bundled by the clamps 33 at the respective retracted portions at both ends. The clamp 33 is made of a soft resin, and has latch portions 33a and 33b at its ends. When the clamp 33 bends due to its softness and the latch portions 33a and 33b engage, the open end of the clamp 33 is closed.

An optical fiber alignment tool 34 is fixed to the surface of the tray 16a between the clamp 33 and the holding section 32 with a double-sided adhesive tape. The optical fiber alignment tool 34 is made of an elastic soft resin such as nylon (polyamide) resin and has a plurality of comb-shaped grooves as slits. The width of each groove is set slightly smaller than the width of the optical fiber cord. Accordingly, the optical fiber cords 12a, 12b,... And the optical fiber cords 19a, 19b,.

The optical IDF board 1 according to the present embodiment as described above.
In No. 3, since the fusion tray 16a is provided with the optical fiber alignment tool 34 as described above, even if the clamp 33 is opened,
Even if the clamp 33 is not provided on the tray 16a, the optical fiber cords 12a, 12b,.
are press-fitted and held in the optical fiber alignment tool 34, so that they do not float as in the related art.

Therefore, when the optical fiber cords are fusion-spliced, the optical fiber cords do not move, and the workability of connecting and disconnecting the optical fiber cables is improved. Further, when the clamp 33 is opened for connection work of the optical fiber cord or the like, the optical fiber cord does not fall off the tray 16a. In addition, it becomes easy to perform an extra length process of winding the optical fiber cord between the holding portion 32 and the optical fiber alignment tool 34 in an annular shape.

Since each optical fiber cord is kept aligned by the optical fiber aligner 34,
It is easy to distinguish between the optical fiber cords. For this reason, unlike the conventional case, the optical fiber cords do not fall apart and become indistinguishable from one another, making it possible to easily identify the optical fiber cord to be worked on. Become.

Further, since the optical fiber cord is identified, it is not necessary to pull the optical fiber cord so as to approach the base of the cord, and it is possible to prevent an adverse effect on the connection of the optical fiber cord which is not to be worked.

Next, a description will be given of a second embodiment in which the optical fiber cable distribution board according to the present invention is applied to the above-described optical IDF board.

FIG. 2 is a perspective view of the fusion tray 16A used in the optical IDF board 13 according to the present embodiment. In this figure, the same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

In the fusing tray 16A according to the present embodiment,
The optical fiber alignment tool 34 and the clamp 33 used in the fusion tray 16a according to the first embodiment are integrated. That is, the optical fiber alignment tool 34 is sandwiched by the clamp 33 provided in the optical fiber lead-in section via the sponge 41. The sponge 41 is adhered to the upper and lower portions inside the clamp 33, and the optical fiber alignment tool 34 is adhered to the lower sponge 41.

As described above, even when the optical fiber aligning tool 34 is held between the clamps 33, the optical fiber cord is pressed into the optical fiber aligning tool 34 and held in an aligned state, as in the above-described embodiment. For this reason, according to the present embodiment, the same effects as those of the above-described embodiment can be obtained, workability such as connection work of the optical fiber cord can be improved, and the optical fiber cord does not fall off the tray. Further, the discrimination between optical fiber cords can be easily performed, and there is no adverse effect on other optical fiber cords.

In each of the above embodiments, the fusion tray 16
Although the description has been given of the case where the optical fiber aligning tool 34 is provided in the first embodiment, the optical fiber aligning tool 34 can be similarly provided in the line side connector tray 17 and the device side connector tray 18.

For example, as shown in the perspective view of FIG. 3, the optical fiber alignment tool 34 sandwiched by the clamp 33 via the sponge 41 described in the second embodiment is provided on the line side connector tray 17a. I can do it.

In this connector tray 17, an adapter 20 is arranged in the center of the tray in place of the fusion splicing portion holding portion 32 of the fusion tray 16. These adapters 20
Each plug 51 of the optical connector is inserted into both ends of
At both ends of the adapter 20, optical fiber cords 19a, 19b,... With connectors at both ends and optical fiber cords 21a, 21b,.

Further, as in the fusion tray 6a shown in FIG. 1, the clamp 33 and the optical fiber alignment tool 34 can be provided separately in the line side connector tray 17 and the apparatus side connector tray 18.

The same effects as those of the first and second embodiments described above can also be obtained by providing the optical fiber alignment tool 34 on the line side connector tray 17 and the apparatus side connector tray 18 as described above.

[0042]

As described above, according to the present invention, even when the bundle is opened, the optical fiber cord is pressed into the optical fiber aligning tool and held, so that it does not float as in the prior art. For this reason, the workability of operations such as connecting and disconnecting the optical fiber cord, which is performed by opening the bundle, is improved.
Further, the optical fiber cord does not fall off the tray when the bundle is opened.

Also, since the optical fiber cords are kept aligned by the optical fiber aligner, it is easy to distinguish between the optical fiber cords. For this reason, it is possible to easily identify the optical fiber cord to be worked on, and it is not necessary to pull other optical fiber cords to adversely affect the connection.

[Brief description of the drawings]

FIG. 1 is a perspective view of a fusion tray used in an optical fiber cable distribution board according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a fusion tray used in an optical fiber cable distribution board according to a second embodiment of the present invention.

FIG. 3 is a perspective view of a track side connector tray to which a second embodiment is applied.

FIG. 4 is a diagram showing a schematic configuration of an optical IDF board.

FIG. 5 is a perspective view of a fusion tray used for a conventional optical IDF board.

[Explanation of symbols]

12, 12a, 12b: line-side optical fiber cord 13: optical IDF panel 16: fusion tray unit 16a, 16A: fusion tray 17: line-side connector tray unit 17a: line-side connector tray 18: device-side connector tray unit 18a ... Device side connector tray 19, 19a, 19b ... Optical fiber cord with one end connector 20, 22 ... Adapter 21, 21a, 21b ... Optical fiber cord with both ends connector 31 ... Fusion reinforcing tube 32 ... Fusion joint holding part 33 ... Clamps (bundles) 33a, 33b: Latch portion of clamp 33 34: Optical fiber alignment tool 41: Sponge 51: Plug of optical connector

Claims (4)

[Claims] In an optical fiber cable distribution board provided with a tray to which a plurality of arbitrary optical fiber cables are connected, the optical fiber cords are aligned by press-fitting the optical fiber cords into a plurality of comb-shaped grooves. An optical fiber cable distribution board, wherein an optical fiber aligning tool to be held is provided on the tray. 2. The optical fiber cable according to claim 1, wherein the optical fiber aligning tool is sandwiched between bundles for binding the optical fiber cords, which are provided in an optical fiber drawing portion of the tray. Wiring board. 3. The tray is a fusion tray to which each end of an arbitrary optical fiber cable is fusion-spliced, and the fusion splicing portion is provided together with a fusion reinforcing tool on a holding portion provided on the tray. The optical fiber cable distributor according to claim 1, wherein the optical fiber cable distributor is held. 4. The tray is a connector tray to which each end of an arbitrary optical fiber cable is connected using an optical connector, and each plug of the optical connector is connected to each other via an adapter provided in the tray. The optical fiber cable distribution board according to claim 1, wherein the optical fiber cable distribution board is connected to a cable.