JPH095532A - Optical cable connection module - Google Patents

Abstract

(57) [Abstract] [Object] An object of the present invention is to provide an optical cable connection module in which a subscriber side optical fiber can be easily replaced. [Structure] A subscriber side optical connector storage case (11) stores a subscriber side optical connector (20), and a station side optical connector storage case (12) stores a station side optical connector (18). In addition, a subscriber side optical connector storage case (1
1) can be pulled out of the cabinet (40). Thus, by pulling out the subscriber side optical connector storage case (11) to the outside of the cabinet (40), the subscriber side optical connector (20) can be easily taken out from the subscriber side optical connector storage case (11). You can The optical fiber (30) on the subscriber side can be easily replaced at the optical connector (20).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical cable connection module for connecting an optical fiber on the subscriber side and an optical fiber on the station side, and particularly to another subscriber when the optical fiber on the subscriber side is defective. The present invention relates to an optical cable connection module that can be easily replaced with a side optical fiber.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional optical cable connection module. As shown in the figure, a conventional optical cable connection module 100 is a module for connecting a subscriber side optical fiber 110 extending from a subscriber side optical cable and a station side optical fiber 111 extending from a station side optical cable, and is a module in a central office. Subscriber fiber termination rack (hereinafter referred to as FTM (FiberT
ermination Module) rack) 120.

The optical cable connection module 100 is provided with a connecting optical fiber 101 for connecting a subscriber side optical fiber 110 and a station side optical fiber 111. Then, the connecting optical fiber 101 and the subscriber side optical fiber 11
0 is provided with a subscriber side optical connector 102, and a station side optical connector 103 is provided between the connecting optical fiber 101 and the station side optical fiber 111.

Further, an optical coupler 104 is attached to the connecting optical fiber 101, and the optical fiber 11
0, 111 incidence of the test light, and the optical fiber 110,
The test light from 111 can be detected. From this optical coupler 104, an optical fiber 105 for transmitting test light is transmitted.
Is extended, and the optical connector 1 is attached to the end of the optical fiber 105.
06 is attached.

Optical coupler 104, optical connectors 102, 10
6, and other optical components (not shown) are stored in the optical component storage case 107. The optical component storage case 107 has a rail 121 fixed to the FTM rack 120.
It is slidably mounted on. Therefore, the optical component storage case 107 moves along the rail 121,
The optical component storage case 107 can be drawn out of the FTM rack 120.

Therefore, the optical component storage case 107 is installed in the FTM.
By pulling it out of the rack 120 and taking out the optical connector 102 from the optical component storage case 107, the optical fiber 110 on the subscriber side can be replaced at the optical connector 102. Further, by taking out the optical connector 106 from the optical component storage case 107, an optical fiber for test light transmission can be connected to the optical connector 106.

[0007]

As described above, in the conventional optical cable connection module 100, the optical coupler 104, the optical connector 102,
106 and other optical components are all housed. However, in this way, many optical components are installed in the optical component storage case 1.
In order to store the optical components in the optical component storage case 07, the internal structure of the optical component storage case 107 needs to be complicated. Therefore, the assembly process of the optical component storage case 107 becomes complicated.

Further, when the subscriber side optical fiber 110 is replaced or the test optical transmission optical fiber is connected, it is necessary to take out the optical connectors 102 and 106 from the optical component storage case 107. In this removal work,
The operator's hand may enter the optical component storage case 107 and come into contact with other optical components in the optical component storage case 107. Then, this contact may damage other optical components.

The present invention solves such a problem and makes it possible to easily assemble a storage case for storing optical components.
Moreover, it is an object of the present invention to provide an optical cable connection module in which an optical fiber on the subscriber side can be easily replaced.

[0010]

In order to solve the above-mentioned problems, an optical cable connection module of the present invention is a module provided inside a cabinet for connecting a subscriber side optical fiber and a station side optical fiber, A subscriber side optical connector attached to one end of the subscriber side optical fiber is accommodated and attached to one end of the station side optical fiber and a subscriber side optical connector storage case that is provided so as to be freely drawn out from the cabinet. A station side optical connector storage case that stores the station side optical connector and is fixed to the cabinet,
Attaching one end to the subscriber side optical connector and the other end to the office side optical connector, a connecting optical fiber for optically connecting the subscriber side optical fiber and the station side optical fiber,
There is provided a reinforcing tube which is bridged between the subscriber side optical connector storage case and the office side optical connector storage case and through which the connecting optical fiber is inserted.

Here, a slide mechanism for pulling out the subscriber side optical connector storage case from the cabinet may be provided between the cabinet and the subscriber side optical connector storage case.

An optical multiplexer / demultiplexer may be provided in the connecting optical fiber in the office side optical connector storage case.

Further, the subscriber side optical connector storage case may be provided with a space for storing the extra length of the subscriber side optical fiber.

Furthermore, the station side optical connector housing case is provided between the connecting optical fiber and the station side optical connector and converts the multicore optical fiber into a single core optical fiber. Should be stored.

[0015]

According to the optical cable connection module of the present invention,
The station side optical connector storage case is fixed to the cabinet. On the other hand, the subscriber-side optical connector storage case can be pulled out from the cabinet. Therefore, the subscriber-side optical connector storage case can be pulled out from the cabinet, and the subscriber-side optical connector can be easily taken out from the subscriber-side optical connector storage case. The optical fiber on the subscriber side can be easily replaced at this optical connector.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view showing an optical cable connection module 10 according to an embodiment of the present invention. 2 and 3 show a subscriber side optical connector storage case 11
FIG.

As shown in FIG. 1, the optical cable connection module 10 connects one end 30a of a subscriber side optical fiber 30 extending from a subscriber side optical cable and one end 31a of a station side optical fiber 31 extending from a station side optical cable. It is a module and is housed in the FTM rack 40 in the central office. The other end of the subscriber side optical fiber 30 is connected to a subscriber terminal (not shown). The other end of the station side optical fiber 31 is connected to a transmission device (not shown) in the telephone station. The FTM rack 40 has a width of 1600 mm,
It has a rectangular parallelepiped shape with a height of 1800 mm and a depth of 600 mm, and can accommodate a maximum of 250 optical cable connection modules 10 inside.

The optical cable connection module 10 comprises a subscriber side optical connector storage case 11 having a substantially rectangular parallelepiped shape and a station side optical connector storage case 12 having a substantially rectangular parallelepiped shape. The subscriber-side optical connector storage case 11 and the office-side optical connector storage case 12 have a rear surface 11a and a front surface 12 respectively.
It is attached to the side plate 13 with a facing each other. Here, the connector storage cases 11 and 12 are made of plastic. The side plate 13 is made of metal.

As shown in FIG. 2, a laterally extending protruding piece 14 is formed at the upper end of the side plate 13. At the one end 14a side of the protruding piece 14, the office side optical connector storage case 1
2 is fixed. Further, the subscriber side optical connector storage case 11 is fixed to the other end 14b side of the projecting piece 14 via the guide portion G.

The guide portion G is provided on the protruding piece 14, extends toward the optical connector housing 11 on the subscriber side, and has a guide rail 1 whose tip is bent in an L shape.
5 and the upper surface 11b of the subscriber side optical connector storage case 11
And a hanging member 16 having a tip bent in an L shape while extending toward the protruding piece 14.
The suspension member 16 is slidable along the guide rail 15 while engaging with the guide rail 15. Therefore, the subscriber side optical connector storage case 11
Can slide along the guide rails 15, and the subscriber-side optical connector storage case 11 can be mounted on the FTM rack 40.
It is possible to take it in and out.

Specifically, the subscriber side optical connector storage case 11 and the office side optical connector storage case 12 are in the closest position shown in FIG. 2 and the subscriber side optical connector storage case 1
1 and the station side optical connector storage case 12 are farthest apart from each other.
Subscriber side optical connector storage case 1 between the position shown in
1 moves. 2, the subscriber side optical connector storage case 11 is stored inside the FTM rack 40, and the subscriber side optical connector storage case 11 is stored in the position shown in FIG.
Are drawn out of the FTM rack 40. A lid F is attached to one side surface 11f of the subscriber-side optical connector storage case 11 with a screw or the like. By removing the lid F, the subscriber-side optical connector storage case 11 is formed.
The optical components inside can be taken out.

As shown in FIG. 1, a nylon reinforcing tube 17 is laid between the rear surface 11a of the subscriber side optical connector storage case 11 and the front surface 12a of the office side optical connector storage case 12. There is. Specifically, a tube insertion hole 11c is formed in the rear surface 11a of the subscriber side optical connector storage case 11, and one end 17a of the reinforcing tube 17 is inserted in the tube insertion hole 11c. Further, a tube insertion hole 12b is formed in the front surface 12a of the office side optical connector storage case 12, and the other end 17b of the reinforcing tube 17 is inserted into the tube insertion hole 12b. here,
When the subscriber side optical connector storage case 11 is slid to reinforce so that the reinforcing tube 17 is not cut even when the distance between the subscriber side optical connector storage case 11 and the office side optical connector storage case 12 is widened. The tube 17 has a sufficiently long length.

A fiber insertion hole 11e is formed in the front surface 11d of the subscriber side optical connector storage case 11, and the subscriber side optical fiber 30 is inserted into this fiber insertion hole 11e. The inserted subscriber-side optical fiber 30 extends into the subscriber-side optical connector storage case 11, and the adapter 20a of the subscriber-side optical connector 20 is fixed to one end 30a of the subscriber-side optical fiber 30. . The subscriber side optical connector storage case 11 is provided with a space S sufficient to accommodate the extra length of the subscriber side optical fiber 30. Therefore, when the optical fiber 30 on the subscriber side is too long, the optical fiber 30 can be drawn into the optical connector housing case 11 on the subscriber side.

An optical fiber 19 for connection is inserted in the reinforcing tube 17, and one end 17 of the reinforcing tube 17 is inserted.
An optical fiber 19 for connection is led out from a and the other end 17b. The connecting optical fiber 19 led out from the one end 17 a of the reinforcing tube 17 extends in the subscriber side optical connector storage case 11, and the one end 1 of the connecting optical fiber 19 is connected.
The plug 20b of the optical connector 20 on the subscriber side is fixed to 9a. Also, the plug 2 of the connecting optical fiber 19
0b is attached to the adapter 20a of the subscriber side optical fiber 30. Therefore, the connecting optical fiber 19 and the subscriber side optical fiber 30 are optically connected.

The connecting optical fiber 19 led out from the other end 17b of the reinforcing tube 17 extends in the office side optical connector housing case 12, and the other end 1 of the connecting optical fiber 19
The plug 18a of the station side optical connector 18 is fixed to 9b. Further, the adapter 18b of the station side optical connector 18 is fixed to the rear surface 12c of the station side optical connector storage case 12 with screws or the like. Further, a plug 18c is fixed to one end 31a of the office side optical fiber 31. A plug 18a and a plug 18b are attached to both ends of the adapter 18b. Therefore, the connecting optical fiber 19 and the office side optical fiber 31 are optically connected.

As described above, the subscriber side optical fiber 30 and the connecting optical fiber 19 are optically connected, and the office side optical fiber 31 and the connecting optical fiber 19 are optically connected. As a result, the subscriber-side optical fiber 30 and the office-side optical fiber 31 are optically connected via the connecting optical fiber 19.

The subscriber side optical fiber 30 is a multi-core optical fiber in which a plurality of single-core optical fibers are processed into a tape shape. On the other hand, the station side optical fiber 31 is
It is a single-core optical fiber composed of a plurality of single-core optical fibers. Therefore, the subscriber side optical connector 20 for connecting the subscriber side optical fiber 30 and the connection optical fiber 19 to each other.
For this, a multi-core optical connector is used. A single-core optical connector is used as the station-side optical connector 18 that connects the station-side optical fiber 31 and the connecting optical fiber 19. Further, a jumper cord section 21 for performing multi-core / single-core conversion is provided between the connecting optical fiber 19 and the office side optical connector 18. The single-wire branched portion of the jumper cord portion 21 remains as a core wire without being covered.

As described above, the reason why the core wire is used in the portion where the jumper cord portion 21 is branched by a single line is that the subscriber side optical connector is accommodated because the jumper cord portion 21 is accommodated in the station side optical connector storage case 12. This is because there is little risk that a tensile load will be applied to the jumper cord portion 21 when the storage case 11 is moved or that the jumper cord portion 21 will be directly touched by the hand. Therefore, since it is not necessary to cover the jumper cord portion 21, the manufacturing cost of the optical cable connection module 10 can be kept low.

An optical coupler 22 is fixed to the connecting optical fiber 19 in the station side optical connector storage case 12.
Then, from this optical coupler 22, two optical fibers 23,
24 have been pulled out. These optical fibers 23, 2
The reinforcing tube 17 is inserted through. Optical fibers 23, 24 led out from one end 17a of the reinforcing tube 17
Extends inside the subscriber side optical connector housing case 11, and optical connector plugs 25 and 26 are fixed to the tips 23a and 24a of the optical fibers 23 and 24, respectively.

The optical coupler 22 has a multiplexing / demultiplexing function. Therefore, by connecting a test device (not shown) to the plugs 25 and 26 and injecting the test light from the test device to the subscriber side optical fiber 30 or the station side optical fiber 31, these optical fibers 30 , 31 can be combined with the test signal light. Further, the test light can be demultiplexed from the transmission signal light transmitted through the optical fibers 30 and 31, and the test light can be detected by the test device. Therefore, by injecting the test light into the optical fibers 30 and 31, it is possible to determine whether the optical fibers 30 and 31 are broken in the middle. The test light transmitted through the optical fibers 30 and 31 has a wavelength different from the wavelength of the transmission signal light so as not to affect the transmission signal light.

The FTM rack 40 has a module insertion hole 41.
Is provided, and the optical cable connection module 10 is inserted into the module insertion hole 41. And
The subscriber side optical connector storage case 11 is arranged on the opening end 41a side of the module insertion hole 41, and the office side optical connector storage case 12 is arranged on the bottom surface 41b side of the module insertion hole 41.

At one end 14a of the protruding piece 14, a convex portion 14c is formed.
Is provided, and the lower surface 12 of the optical connector storage case 12 on the station side is provided.
A convex portion 12e is provided at d. Further, concave portions 41a and 41b are provided at positions facing the convex portions 12e and 14c of the module insertion hole 41, respectively. Therefore, when the optical cable connection module 10 is inserted into the module insertion hole 41, the convex portions 12e and 14c and the concave portion 4 are inserted.
1a and 41b are fitted to each other, and the optical cable connection module 1
0 does not fall out from the module insertion hole 41.

Next, the dimensions of the optical cable connection module 10 will be illustrated with reference to FIG. First, the side plate 1
The length A of the side in the longitudinal direction of 3 is 396.5 mm,
The length B of the side plate 13 which is not the longitudinal direction is 110.9.
mm. In addition, a subscriber side optical connector storage case 11
The length C of the side in the longitudinal direction is 150.0 mm, and the length D of the side in the longitudinal direction of the station side optical connector storage case 12 is
Is 206.5 mm. Furthermore, the length E from the upper end of the side plate 13 to the lower end of the reinforcing tube 17 is 168.
It is 1 mm.

Next, the replacement work of the subscriber side optical fiber 30 will be described based on the configuration of the optical cable connection module 10 described above.

To replace the optical fiber 30 on the subscriber side, first, the optical connector storage case 11 is pulled out from the FTM frame 40. Next, the lid F of the optical connector storage case 11 is removed, and the optical connector 20 is taken out from the optical connector storage case 11. Then, the optical connector 2 taken out
At the portion of 0, the subscriber side optical fiber 30 is replaced.

An optical fiber extending from the above-mentioned test device (not shown) is usually connected to the plugs 25 and 26. The replacement of the optical fiber can be performed in the same procedure as the replacement work of the optical fiber 30 on the subscriber side.

Here, only the subscriber side optical connector 20 and the plugs 25 and 26 are contained in the optical connector storage case 11. Therefore, in each of the above-described operations, the subscriber side optical connector 20 and the like can be efficiently taken out from the optical connector storage case 11. Further, when the subscriber side optical connector 20 or the like is taken out from the optical connector storage case 11, it does not come into contact with other optical components such as the optical coupler 22 and damage the other optical components.

The main function of the optical cable connection module 10 of this embodiment is to connect the station side optical fiber 31 and the subscriber side optical fiber 30, and the defect inspection of the optical fiber is an additional function. The material and dimensions of the connector storage cases 11 and 12 and the side plate 13 shown in the above embodiment are as follows.
It is an example, and the materials and dimensions are not limited. Dimensions of FTM rack 40, optical cable connection module 1
The number of stored 0 is not limited to the value in the embodiment.

[0039]

As described in detail above, according to the optical cable connection module of the present invention, the subscriber side optical connector is stored in the subscriber side optical connector storage case, and the station side optical connector storage case is stored. The connector is stored.
Thus, the optical cable connection module of the present invention has two
It is equipped with two storage cases, and the optical parts are distributed and stored in each storage case. Therefore, the structure of the storage case is simpler and the assembly of the storage case is easier than that of the conventional optical cable connection module in which all the optical components are stored in a single storage case.

Also, the subscriber side optical connector storage case is
Can be pulled out of the cabinet. In this way, by pulling out the subscriber side optical connector storage case, the subscriber side optical connector can be easily taken out from the subscriber side optical connector storage case. Then, the optical fiber of the subscriber side can be easily replaced at this optical connector.

Particularly, the subscriber side optical connector storage case mainly stores the subscriber side optical connector. Therefore, when the subscriber side optical fiber is replaced, it does not come into contact with other optical components such as the office side optical connector and damage the other optical components.

[Brief description of drawings]

FIG. 1 is a sectional view showing an optical cable connection module according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which a subscriber side optical connector storage case is closest to an office side optical connector storage case.

FIG. 3 is a perspective view showing a state in which the subscriber side optical connector storage case is farthest from the office side optical connector storage case.

FIG. 4 is a sectional view showing a conventional optical cable connection module.

[Explanation of symbols]

10 ... Optical cable connection module, 11 ... Subscriber side optical connector storage case, 12 ... Station side optical connector storage case,
17 ... Reinforcement tube, 18 ... Station side optical connector, 19 ... Connection optical fiber, 20 ... Subscriber side optical connector, 21 ... Jumper cord part (multi-core / single-core conversion member), 22 ... Optical coupler (optical multiplexer / demultiplexer) ), 30 ... Subscriber side optical fiber, 31 ... Station side optical fiber, 40 ... FTM rack (cabinet), G ...
Guide (sliding mechanism), S ... space.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Naoki Nakao 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Takashi Ebihara 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Takashi Mima 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Naoyuki Atobe 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation

Claims (5)

[Claims] 1. An optical cable connection module provided inside a cabinet for connecting a subscriber side optical fiber and a station side optical fiber, wherein a subscriber side optical connector attached to one end of the subscriber side optical fiber is housed. Then, a subscriber side optical connector storage case that is provided so as to be freely drawn out to the cabinet and a station side optical connector attached to one end of the station side optical fiber are stored and fixed to the cabinet. A station side optical connector housing case, one end of which is attached to the subscriber side optical connector and the other end of which is attached to the station side optical connector to optically connect the subscriber side optical fiber and the station side optical fiber. The optical fiber for connection and the optical fiber for connection, which is bridged between the subscriber side optical connector storage case and the office side optical connector storage case. Cable connection module, characterized in that it comprises a reinforcing tube for inserting the Aiba. 2. A slide mechanism for pulling out the subscriber side optical connector storage case from the cabinet is provided between the cabinet and the subscriber side optical connector storage case. The optical cable connection module described. 3. The optical cable connection module according to claim 1, wherein an optical multiplexer / demultiplexer is provided on the connection optical fiber in the office side optical connector storage case. 4. The subscriber-side optical connector storage case is provided with a space for accommodating an extra length of the subscriber-side optical fiber. The optical cable connection module described in. 5. The multi-core single fiber provided in the station-side optical connector storage case between the connection optical fiber and the station-side optical connector for converting the multi-core optical fiber into a single-core optical fiber. The optical cable connection module according to any one of claims 1 to 4, wherein the conversion member is housed.