JPH11133248A - Optical wiring board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to easily deal with the presence or absence of line monitor relating to the respective optical fibers in a frame by housing a termination unit constituted by selecting either of adapter modules or coupler modules into the frame. SOLUTION: The termination unit 29 includes a unit body supported in the line side frame. Any of adapter modules 44 including optical connector adapters 44a and coupler modules, such as coupler modules 45, for switchably connecting optical fibers 28 and optical fibers 33 via the built-in optical couplers are attachably and detachably built onto the unit body. The presence or absence of the line monitor may be easily selected with respect to the respective optical lines within the same termination unit 29 by the constitution. There is no need for disposing the respectively connecting units to be exclusively used into the same frame or separately disposing the optical wiring board to be exclusively used according to the presence or absence of the line monitor. The efficient utilization of the volume in the frame is thus made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical distribution board,
In particular, the present invention relates to an optical distribution board provided with a line monitoring device for monitoring a disconnection or the like of an optical line.

[0002]

2. Description of the Related Art FIG. 11 is a front view showing a conventional optical distribution board. In FIG. 11, reference numeral 1 denotes a box, and a plurality of optical cables 2 are drawn in from above or below. These optical cables 2 are arranged along the side plate 10 of the box 1, and a cable clamp 4b
The optical fiber core 3a is fixed by a tension member clamp 4c, and is led out. These optical fiber cores 3a are connected to the fusion tray tray storage T1 at the bottom of the box 1.
, And are sorted and stored in a multi-layered draw-out type fusion part tray 6, 6,... In the fusion part tray storage part T1. In each of the fusion trays 6, 6,..., The optical fiber core wire 3a is connected to one end of the branch-out fan-out cord 3b, which is not branched, via a fusion splicing reinforcement (not shown). In the fusion tray storage T1, the fusion trays 6, 6,... Are accommodated in a slide unit 12 attached to the back plate 11 of the box 1 and are moved in the front-rear direction (FIG.
It can be pulled out and stored in the depth direction of the paper).

[0003] The fan-out code 3b is pulled out upward through a center tray 9 installed above the fusion part tray storage section T1.
b are introduced from the left side in the drawing into the drawer-type branch connection trays 8, 8,... stacked in multiple stages in the branch connection tray storage portion T2 installed above the center tray 9, The connection is switchably connected to a jumper code j (optical code) introduced into the branch connection tray 8 from the right through an optical connector (not shown). The branch connection trays 8, 8,... In the branch connection tray storage portion T2 are guided / guided by guide rods 15 protruding from the back plate 11 of the box 1 and pulled out / stored in the front-rear direction (the depth direction in FIG. 11). It is possible. The jumper code j is wired between the two branch connection trays 8, 8, and is connected to the other branched end of the fan-out cord 3 b in the branch connection tray 8, thereby connecting the target optical lines. The extra length of the jumper code j is stored in the branch connection tray storage section T2,
Alternatively, wiring is performed by using the support 4 (cord clamp) on the side surface of the box 1 so as to be folded back.

[0004] In the branch connection tray 8, the crossover wiring storage trays 9 a, 9 arranged above and below the box 1.
In some cases, the fan-out cord 3b may be connected to the connecting wire 3d (optical cord) introduced into the box 1 from b. Thereby, the optical line drawn into the box 1 by the optical cable 2 can be connected to the optical line outside the box 1. Box 1
A large number of support members 4 are protruded from the inner surface side of both side plates 10, and the fan-out cords 3 b,
The jumper code j and the wiring 3d are detachably clamped and retained with an appropriate clamping force that does not affect the optical transmission characteristics.

In recent years, with the increase in complexity of optical fiber networks, measures have been taken to increase the number of connections and branches of optical lines using a plurality of optical distribution boards. When a plurality of optical distribution boards are used, a plurality of optical distribution boards connected in series are connected by a jumper cord or the like, so as to correspond to the number of connections and the number of branches of the optical line. FIG. 12 is a front view illustrating an example of an optical distribution board with an increased number of cores. This optical distribution board has a line-side frame 17 that terminates an optical fiber 16a drawn from the line-side optical cable 16 so as to be connectable.
A device-side frame 19 for connecting the optical fiber 18 terminated to the connector on the transmission device side; and a jumper cord j wired between the line-side frame 17 and the device-side frame 19. And a relay frame C for storing the same. Track side frame 17
Is the fusion tray storage section 18a and the branch connection tray storage section 1
8b, the apparatus-side frame 19 is provided with a branch connection tray storage portion 19b, and the jumper code j is wired between the branch connection tray storage portions 18b, 19b of the both frames 17, 19, and the line-side optical fiber 16a. And the optical line related to the optical fiber 18 on the transmission device side are switchably connected. Further, in order to test a disconnection of an optical line using a test optical pulse, a line unit is connected to a corresponding optical line via one of the optical fibers 16a, 18 and j through a coupler unit having a built-in optical coupler. Connect the device.

[0006]

By the way, in order to perform line monitoring on a specific optical line, a coupler unit installed in an existing optical distribution board is connected to a line monitoring device via an optical fiber, or It is necessary to connect it to a line monitoring device by drawing it into an optical wiring board dedicated to the coupler unit that is separately installed. However, in the optical wiring boards shown in FIGS. 11 and 12, it is difficult to install a coupler unit, and it is difficult to increase the number of optical fibers such as the number of optical lines and the number of branches connected by the optical wiring boards. Problem. On the other hand, when an optical wiring board dedicated to the coupler unit is installed, problems such as difficulty in securing an installation space and an increase in cost arise. In addition, in both cases where a coupler unit is installed in an existing optical distribution board or when an optical distribution board dedicated to a coupler unit is installed, a cloth for passing an optical fiber relating to an optical line to be monitored through the coupler unit. The length of the wire becomes longer, and the number of optical fibers tends to increase because an additional optical fiber is required to connect between the tray connecting the optical fibers to each other and the coupler unit. In addition to the fact that the optical fiber is likely to be complicated in the middle, wiring is difficult,
The task of switching the optical line for line monitoring was difficult, and the switching could not be performed quickly.

In the case where the coupler unit is installed in the optical distribution board shown in FIG. 11, for example, the fan-out cord 3b connected to the optical fiber core 3a of the optical cable 2 is connected to the branch connection tray storage T2 by a single core. The optical fiber is branched and connected to an optical fiber laid between the branch connection tray storage T2 and the coupler unit. For this reason, in addition to the installation space for the coupler unit in the optical distribution board, it is necessary to secure a storage space for the laid optical fibers between the coupler unit and the branch connection tray storage portion T2. It is not possible to secure a sufficient space for switching optical fibers for switching j or the like, so that the switching workability is greatly reduced, and it is difficult to increase the number of corresponding cores. In addition, the lack of a suitable coupler unit that enables the switching connection between optical fibers connected via the coupler unit has also been a cause that the switching workability cannot be improved.

In view of the above problem, in the optical distribution board, optical fibers related to an optical line for performing line monitoring are gathered near the coupler unit, and an optical fiber for which line monitoring is not performed is separated from the coupler unit. It is possible to avoid complicating optical fibers by collecting and storing them in a place.However, the difference in the number of allocated optical fibers may cause unnecessary storage space in the optical distribution board. Can not be settled. Moreover,
In order to switch the presence / absence of line monitoring in the optical distribution board, it is necessary to change the storage location of the optical fiber, so that there is a problem that it is difficult to improve the switching workability.

When a so-called connector-equipped optical cable having an optical fiber with a connector terminated in advance is drawn into the optical distribution board and connected to another optical fiber, for example, the fusion of the optical distribution board shown in FIG. Tray storage section T1
And the fusion tray tray storage 18 of the optical distribution board shown in FIG.
a may be wasted. In the meantime, there has been no suitable means for line monitoring of cables with connectors drawn into optical distribution boards, so there is a need for the development of technology that can easily connect optical fibers of optical cables with connectors to line monitoring equipment. I was Moreover, if it is necessary to efficiently switch the presence or absence of line monitoring for both the optical fiber of the cable with connector and the optical fiber of a general optical cable that is not terminated with a connector, there has been no appropriate technology so far. Development was required.

The present invention has been made in view of the above-mentioned problem, and provides an optical distribution board which achieves the following objects. According to the first aspect of the present invention, (a) the termination unit configured by selecting one of the adapter module and the coupler module is housed in the frame to monitor the line of each optical fiber in the frame. (B) Since the adapter module and the coupler module can be easily attached to and detached from the unit main body, by exchanging the adapter module and the coupler module with the unit main body, the light beam related to the optical fiber The presence / absence of track monitoring of the road can be easily switched. According to the second aspect of the present invention, (c) by arranging a plurality of adapter modules or coupler modules side by side, the mounting density of these adapter modules and coupler modules is improved, and the number of corresponding optical distribution boards can be increased. . According to the third aspect of the present invention, (d) the optical connection portion and the excess length between the terminated optical fiber or the coupler connecting optical fiber connected to the coupler module and the unterminated optical fiber drawn from the optical cable are determined. The connection module can be compactly stored and the volume inside the frame can be used more effectively. (E) By selecting the presence or absence of the connection module, it is possible to respond to the type of the optical fiber drawn from the optical cable. The optical fiber can be efficiently connected to the line monitoring device.

[0011]

According to the present invention, one or a plurality of termination units for connecting an optical fiber drawn from an optical cable to another optical fiber are housed in a frame, and the termination unit is connected to the optical cable. An adapter module incorporating an optical connector adapter for switchably connecting an optical fiber and another optical fiber, and a switchably connected optical fiber on the optical cable side and another optical fiber via a built-in optical coupler. And a unit body in which one or both selected from a coupler module are detachably incorporated, and the coupler module sends test light to an optical fiber connected via the optical coupler and operates the optical fiber. A monitoring terminal connected to a connection terminal of a core selection device connected to a line monitoring device for monitoring an optical line. The optical wiring board to be characterized were the solutions of the problems.

According to the present invention, by incorporating one of the adapter module and the coupler module into the termination unit, it is possible to easily select whether or not to monitor the optical line related to the optical fiber. . That is, the adapter unit is selected when the line monitoring of the optical line is unnecessary, and the coupler module is selected when the line monitoring is required. Further, since both the adapter module and the coupler module are detachably incorporated in the unit main body, it is possible to easily switch the presence / absence of line monitoring by exchanging these. As the optical fiber connected by the termination unit, various configurations such as a multi-core or single-core optical fiber core, an optical cord, and an optical cable can be adopted. As a track monitoring device, a so-called OTDR
(Optical time domain reflectometer) or the like is generally employed. A line monitoring apparatus provided with an optical pulse tester generally includes a core selection device for selecting an optical fiber core to which a test pulse is sent. One or a plurality of coupler modules are connected to the same line selection device via connection terminals.

According to the present invention, it is also possible to adopt a configuration including a terminating unit in which a plurality of adapter modules or coupler modules are incorporated side by side. Thereby, the mounting density of the adapter module and the coupler module can be increased.

According to the present invention, the optical module is selected from a terminated optical fiber that can be connected to the optical connector adapter of the adapter module or an optical fiber for coupler connection connected to the coupler module. It is also possible to adopt a configuration in which a connection module for housing an optical connection portion that connects one of the optical fibers to the optical fiber side is detachably incorporated in the termination unit.
In this configuration, by connecting the optical fiber drawn from the optical cable to the termination optical fiber, the optical fiber can be terminated so as to be connectable to the optical connector adapter of the adapter module, and is connected to another optical fiber by the optical connector adapter. be able to. Also, by connecting the optical fiber drawn from the optical cable to the coupler connecting optical fiber connected to the coupler module, it is possible to connect to another optical fiber via the coupler module. If the optical fiber drawn from the optical cable is connectable and terminated like a so-called cable with connector, and if the optical module can be directly connected to the optical connector adapter or coupler module of the adapter module, the connection module is disconnected from the termination unit. Can be used by detaching.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of an optical wiring board according to the present invention will be described below with reference to FIGS. FIG. 1 is a front view showing an optical wiring board 20 of the present embodiment. The optical wiring board 20 has a configuration in which a line-side frame 21 and a device-side frame 23 are connected via a relay frame 22.

The line side frame 21 has a line side optical cable 2
4, 25 are retracted. The optical cable 24 is drawn in from the upper part of the track side frame 21 and is fixed by the cable fixture 26 and the tension member fixture 27 on the side of the track side frame 21. Tension member fixture 27
An optical fiber 28 (line-side optical cord) pulled out from the terminal of the optical cable 24 in the vicinity is an optical fiber not terminated by an optical connector plug or the like, and is a multi-stage termination unit 29 housed in the line-side frame 21. , 29... From the connection side (the back side in FIG. 1), the optical cable 25 is a so-called cable with a connector, and a cable-fixed portion 30 with a connector above the line side frame 21. The optical fiber 31 (line-side optical cord) pulled out in the vicinity of the connector-attached cable fixing section 30 is drawn into the intended termination unit 29 from the connection side (the back side of the paper in FIG. 1). In FIG. 1, reference numeral 32 denotes a radius maintaining member that maintains the bending radius of the hooked optical fibers 28, 31.

Optical cables 24, 2
The optical fibers 28 and 31 drawn from 5 are switchably connected to one end of another optical fiber 33 (jumper cord) by the termination unit 29. The other end of the optical fiber 33 is drawn into the device-side frame 23 from the termination unit 29 via the relay frame 22, and the single-core or multi-core optical cord 3 pulled out of the transmission device-side cable 34.
5 is connected. In the relay frame 22, an optical fiber 33 is supported by a cord support 36, and the optical fiber 3
3 is ensured.

The cord cable 34 is connected to the device-side frame 2.
The optical cable 35 on the device side is pulled out near the cord cable fixing portion 37 and fixed to the cord cable fixing portion 37 attached to the upper part of the device 3. In the device-side frame 23, termination units 38 for switchably connecting the device-side optical cord 35 and the optical fiber 33 are stored in multiple stages, and the optical cord 35 pulled out from the code cable 34 is attached to the device-side frame. The cable is pulled into the intended termination unit 38 while securing a bending radius via a plurality of cord supports 39 protruding from the side of the body 23, and is connected to the optical fiber 33 in the termination unit 38.

FIG. 10 is a side view showing an example of the termination unit 38 housed in the apparatus side frame 23. 1 and 10, the termination unit 38 includes an adapter panel 41 to which a number of optical connector adapters 40 are attached.
10 are disposed opposite to each other on both sides of the adapter panel 41.
Cord receiving gutter 38a rotatably provided in the middle arrow direction
Is provided. The ends of the optical fiber 33 and the device-side optical cord 35 are respectively connected by an optical connector plug so as to be connectable to the connector.
To both sides. The configuration of the termination unit 38 can be changed as appropriate depending on whether or not the device-side optical cord 35 has a plug termination.

Hereinafter, the termination unit 29 applied to the track side frame 21 will be described. 2 (a), (b),
FIGS. 7 and 8 show the termination unit 29 from (c).
As shown in FIG. 8, the termination unit 29 is
And a unit main body 43 supported by the main body. On this unit main body 43, an adapter module 44 incorporating an optical connector adapter 44a, and a coupler module 45 for switchably connecting the optical fiber 28 and the optical fiber 33 via a built-in optical coupler (not shown). One selected from the coupler module 57 shown in FIG. 6 and the coupler module 61 shown in FIG. 7 is detachably incorporated. In FIG. 8, reference numeral 46 denotes a code duct, which is used to route optical fibers 28, 31, 35 and the like, which are optical cords, into the line side frame 21. Code 47
Is a cord trough.

FIG. 2 is a view showing a case where the adapter module 44 is selected and incorporated into the unit main body 43.
(A) is a side view, (b) is a front view, (c) is a plan view. In FIG. 2A, the adapter module 44 is 8
The optical connector adapter 44a for the heart is incorporated, and is detachably incorporated on the unit main body 43 to support the optical connector adapter 44a. The adapter module 44 installed in the unit body 43 is terminated (hereinafter referred to as “plug termination”) by an optical connector plug of an optical fiber 33 as a jumper cord from the jumper side (left side in FIG. 2A). And a plug-terminated end of a termination optical fiber 49 (termination optical cord) connected to the optical fiber 28 from a connection side (right side in FIG. 2A) facing the jumper side. It is. The optical fiber 28 and the terminated optical fiber 49 are connected via an optical connection 50 (fusion connection), and the optical connection 50 is connected to the optical fiber 2.
With the extra lengths 8 and 49, they are housed in a connection module 52 arranged near the unit body 43.

The connection module 52 is formed in a thin plate shape from a synthetic resin such as plastic and is rotatably supported on a vertical plane by a support shaft 53 arranged near the unit main body 43. The connection module 52 is supported on an upright state by being mounted on a stopper shaft 53a arranged in parallel near the support shaft 53 (see FIG. 8). Further, as shown in FIG. 9, since the connection module 52 can be opened and closed, the work of taking out and storing the optical connection part 50 and the extra length can be performed easily.

2 (a) and 2 (b), a large number of adapter modules 44 are arranged side by side on the unit main body 43, and as shown in FIG. Module 4
4 and are arranged in one-to-one correspondence. Connection module 5
The plugged end of the second terminated optical fiber 49 is connected to the adapter module 44 corresponding to the connection module 52.
The other end of the termination optical fiber 49 is connected to the target optical fiber 28 via the optical connection part 50. Since the optical connector adapter 44a of the adapter module 44 supports connection of eight optical fibers, the connection module 52 accommodates a maximum of eight optical connection parts 50. The connection module 52 has a plurality of types, such as two cores, four cores, and eight cores, corresponding to the number of optical fibers 28 which are optical fiber ribbons. The connection modules 52 having eight cores are arranged at a pitch corresponding to the adapter module 44 in a one-to-one correspondence.
It is a size that is arranged at half the pitch of the heart,
Two cores have a size arranged at a quarter pitch of eight cores. Regardless of the number of corresponding cores, one adapter module 44 has eight connection modules. 52, and can be installed in a fixed installation space. Since the optical connection unit 50 stores the connection points for one core, it goes without saying that the number of storage units in one connection module 52 is changed according to the number of corresponding cores of the connection module 52.

The optical connection parts other than the fusion connection parts are as follows.
Optical connectors and the like can also be employed. Adapter module 4
The number of corresponding cores of 4 is not limited to eight, and can be changed as appropriate, such as four or sixteen. Also, it is possible to incorporate adapter modules 44 having different numbers of corresponding cores into the same unit main body 43. In this case, the number of optical connection units 50 housed in the connection module 52 is also changed according to the number of cores of the adapter module 44. Further, as the terminated optical fiber, a so-called fan-out cord in which one end is branched into multiple fibers and the other end is branched into a single fiber can be adopted. In this case, when the optical fiber 28 on the line side is a multi-core optical fiber, single-core branching and termination can be performed only by connecting a termination optical fiber that is a fan-out cord. At this time, as shown in FIG. 2A, a multi-core, single-core
a is stored.

As shown in FIG. 8, the connection module 52 housed in the termination unit 29 does not rotate to the connection side (the right side in FIG. 8) by the support rod 53b which is rotatable about the support shaft 53. It is supported. Support rod 53b
Is rotated with an appropriate resistance, so that it does not rotate without any manual operation, and can stably support the connection module 52. Further, it is more preferable to attach a lock mechanism for locking and unlocking the rotation to the support rod 53b, thereby more reliably preventing the connection module 52 in the housed state from accidentally turning to the connection side. Can be. Optical connection part 5 to connection module 52
In order to perform operations such as storing or taking out zero or extra length, FIG.
As shown in (a) and (b), first, the support rod 53b is turned to the connection side (the right side in FIGS. 3A and 3B) to be in the side-down state, and then the corresponding connection module 52 is moved. The unit body 43 is turned from the unit body 43 to the connection side so as to be turned sideways. Next, the connection module 52 is rotated about the C-shaped engaging claw 52a engaged with the support shaft 53 to turn the work surface upward, and then opened. The locking claw 52a (see FIG. 9) is rotatably engaged with the support shaft 53, and is also rotatable with respect to the connection module 52. Therefore, the locking claw 52a
By rotating the connection module 52 around the locking claw 52a without removing the from the support shaft 53, the operation of turning the work surface upward can be easily performed. As a result, the connection module 52 is again connected to the termination unit 29.
It is not necessary to re-attach the locking claw 52a to the support shaft 53 when the connection module 52 is housed, and after the connection module 52 is closed, the work is rotated about the support shaft 53 and housed in the termination unit 29. Just do it. The fact that the connection unit 52 can be taken out of the termination unit 29 without being removed and re-stored can be stored in the termination unit 29 again without having to worry about a wrong storage position when storing the connection module 52 again. To be able to do. Also,
Since the locking claw 52a is an elastic claw and can be attached to and detached from the support shaft 53, the connection module 52 can also be attached to and detached from the termination unit 29. Can be relocated to another location of the termination unit 29. Also, since the connection module 52 is configured to be openable and closable, the optical connection unit 50
Work such as storing and taking out of extra length can be easily performed.

Optical cable 2 as a cable with connector
When the optical fiber 31 pulled out from the optical fiber 31 is connected to the adapter module 44, the plug-terminated end of the optical fiber 31 may be directly connected to the adapter module 44. Is unnecessary, and the connection module 52 is also unnecessary. For this reason, FIG.
As shown in FIG.
And the plugged end of the optical fiber 31 is directly inserted into the adapter module 44.

Next, a case where the coupler module 45 is incorporated in the unit body 43 will be described. FIGS. 5A and 5B show a state in which the optical fiber 28 drawn out from the optical cable 24 is connected to another optical fiber 33 (jumper cord) via a coupler module 45, wherein FIG. 5A is a front view, and FIG. It is a side view. In FIG. 5B, a coupler module 45 containing an optical coupler (not shown) is incorporated on the unit main body 43, and the adapter module 4
4 is not used. The coupler modules 45 are formed in a thin plate shape from a synthetic resin or the like, and are arranged in large numbers side by side on the unit main body 43 (in the depth direction in FIG. 5B). The coupler module 45 has an adapter 54 on one side into which the plug-terminated end of the optical fiber 33 is inserted. The adapter 54 is connected to the jumper side of the termination unit 29 (FIG. 5B). (On the middle left side) on the unit main body 43. In addition, the adapter part 54 can correspond to eight single-core optical fibers 33.

As shown in FIG. 8, the coupler module 45
Is installed at a predetermined position on the unit main body 43, the adapter section 54 is positioned at substantially the same position as the adapter module 44 described above. The arrangement pitch of the coupler modules 45 on the unit main body 43 is equal to that of the adapter module 44. Therefore, the coupler module 45
Are also compatible with the connection module 52, and the coupler module 45 and the connection module 52 are installed in one-to-one correspondence. Note that both the adapter module 44 and the coupler module 45
It is installed so as to be inserted into the engagement grooves 43a arranged above, and is thereby stably supported at a predetermined position on the unit main body 43. Further, the coupler module 45 and the adapter module 44 can be appropriately replaced on the unit main body 43.

As shown in FIG. 5B, from the other side of the coupler module 45 facing the adapter 54,
The optical fiber 55 (optical cord) for connecting the coupler is drawn out. The adapter unit 5 of the coupler module 45
4, the core selection device 42 of the track monitoring device (FIG. 1)
(See FIG. 3) is drawn out. The distal end of the terminal connecting optical fiber 45a is provided with a monitoring terminal 45 made of, for example, a so-called MT type optical connector or the like defined in JIS C5981.
It is common to employ a configuration in which the connection is terminated by b and is switchably connected to the connection terminal 56. The coupler connecting optical fiber 55 is connected to the optical fiber 28 drawn out of the optical cable 24 via an optical connecting part 50, and the optical connecting part 50 and the extra length are connection modules installed corresponding to the corresponding coupler module 45. 52. The optical fiber 55 for connecting the coupler is the coupler module 4
Since the optical fiber 28 is optically connected to the optical line on the connection terminal 56 side and the adapter unit 54 via the optical coupler in the optical fiber 5, the optical fiber 28 is connected to the optical fiber 55 for coupler connection via the optical connection unit 50. The optical fiber 28 has an adapter 54
And a core selection device 42.

FIGS. 6A and 6B are views showing a state in which the optical fiber 31 pulled out from the optical cable 25 which is a cable with a connector is connected to the optical fiber 33 via the coupler module 57, wherein FIG. 6A is a front view, and FIG. ) Is a side view. The coupler modules 57 are formed in a thin plate shape from a synthetic resin or the like, and can be arranged in large numbers side by side on the unit main body 43 (in the depth direction in FIG. 6B). Like the coupler module 45, the arrangement pitch of the coupler module 57 on the unit main body 43 is the same as that of the adapter module 44, and is detachable on the unit main body 43.

On both sides of the coupler module 57, adapter parts 58 and 59 for eight cores are arranged facing each other. When the coupler module 57 is installed on the unit main body 43, these adapter portions 58 and 59 are on the jumper side (left side in FIG. 6B) and the connection side (right side in FIG. 6B) of the termination unit 29. They are arranged facing each other. A plug-terminated end (single core) of the optical fiber 33 is inserted into one adapter 58 so as to be able to be inserted and withdrawn, and a plug-terminated end (single core) of the optical fiber 31 is inserted into the other adapter 59. ) Is removably inserted. Further, inside the coupler module 57, the corresponding terminals of both adapter portions 58 and 59 are connected by an optical fiber (not shown), and an optical coupler (not shown) interposed in the middle of the optical fiber. The optical line branched through the connection is connected to the connection terminal 60 by the monitoring terminal 57a. Therefore, one adapter unit 5
8, the optical fiber 33 is connected to the other adapter part 59, and at the same time, the two optical fibers 33,
31 is connected via an optical coupler and the monitoring terminal 5
7a, it is also connected to the line monitoring device via the connection terminal 60, and the line can be monitored. In the coupler module 57, the plug-terminated optical fiber 31 has a configuration in which the plug-terminated end is directly inserted, so that the connection module 52 is unnecessary. For this reason, the number of corresponding cores of the coupler module 57 itself can be increased.

FIG. 7 shows another embodiment of the coupler module 61. The coupler module 61 is formed of a synthetic resin or the like in a thin plate shape, and includes an adapter section 62, a monitoring terminal 61a connected to the connection terminal 63, an optical fiber 64 for coupler connection,
A built-in optical coupler (not shown) is provided. The coupler connecting optical fiber 64 is pulled out from the coupler module 61 installed in the termination unit 29 to the connecting side (the right side in FIG. 7), passes through the code duct 46, and passes through the inside of the line side frame 21 to a target connecting position. Turned. It is preferable that the coupler connecting optical fiber 64 is terminated with a plug, so that the connection switching workability with another optical fiber is ensured. The coupler modules 61 can be arranged side by side in a large number on the unit main body 43, and the arrangement pitch is the same as that of the coupler modules 45 and the adapter modules 44 and the like, and is interchangeable with the coupler modules 45 and the adapter modules 44. It is. According to the coupler module 61, it is not necessary to store the optical connection portion between the coupler connection optical fiber 64 and the line-side optical fibers 28 and 31 or the extra length in the termination unit 29. Compared with the coupler modules 45 and 57 shown in FIG. 7, the degree of freedom in designing the coupler module 61 is improved, and for example, it is possible to improve the mounting density by forming the coupler module 61 in an elongated shape as shown in FIG.

As described above, according to the optical distribution board 20 of the present embodiment, the adapter module 44 and the coupler module 4
Each of the termination units 29 is configured by assembling one or a plurality appropriately selected from 5, 57, and 61 on the unit main body 43. Unit body 43
Above, the adapter module 44 and the coupler module 4
5, 57 and 61 can be mixed. The adapter module 44 and the coupler modules 45, 57 and 61 to be incorporated in the unit main body 43 are the optical fibers 28 on the line side.
31 (the coupler module 61 itself is a line-side optical fiber for the coupler module 61). That is, for the unterminated optical fiber 28 drawn from the optical cable 24, either the adapter module 44 or the coupler module 45 used together with the connection module 52 is selected, and the light drawn from the optical cable 25 which is a cable with a connector is selected. By selecting either the adapter module 44 without the connection module 52 or the coupler module 57 for the fiber 31, any of the optical fibers 28 and 31 can be selected.
Can also be easily connected to the optical fiber 33. Moreover, when the coupler modules 45, 57, and 61 are employed, each of the coupler modules 45, 57, and 61 is used.
The adapter module 44 is adopted by switching the connection of the optical fiber 33 or the optical fiber 28, 31 on the line side within the adapter section or between the coupler modules 45, 57, 61 since the adapters 7 and 61 have the adapter section. The connection between the optical line on the line side and the optical line on the device side can be freely switched in the same manner as in the above case.

When the optical fiber 28 is connected to the optical fiber 33, the coupler module 45 is selected when the line monitoring is performed by the line monitoring device, and when the line monitoring is not performed, the adapter module 45 is used together with the connection module 52. By selecting 44, it is possible to easily cope with the presence or absence of line monitoring. As a result, only desired optical lines can be monitored, and unnecessary line monitoring can be reduced, so that the efficiency of line monitoring can be improved. This advantage is the same even when the optical fiber 31 having the plug is connected to the optical fiber 33. When the line monitoring is performed, the coupler module 57 is selected. When the line monitoring is not performed, the adapter module 57 is used. 44 to select the optical fiber 31
Is directly connected to the adapter module 44, it is possible to easily cope with the presence / absence of track monitoring. Moreover, in the optical distribution board 20, the adapter module 44 and the coupler modules 45, 57, and 6 installed in the unit body 43 are provided.
By exchanging 1, it is possible to easily switch the presence / absence of track monitoring. When the connection module 52 is in use, the connection module 52 to be switched is taken out of the termination unit 29 and the termination optical fiber 49 or the coupler connection optical fiber 55 and the optical fiber 28 It is sufficient to switch the connection with the optical fiber, so that the switching workability is greatly improved as compared with the optical distribution board of the conventional configuration that requires the work of inserting a long optical fiber.

In addition, one of the coupler modules 45,
By selecting 57 and 61, the same termination unit 29 is selected.
It is also possible to perform line monitoring on the optical lines related to all the optical fibers 28, 31 and 33. When all the optical cords 35 of the optical line on the device side are connected to any of the coupler modules 45, 57, 61 via the optical fiber 33,
It is also possible to perform line monitoring for all optical lines connected by the optical distribution board 20. In the optical distribution board 20, the optical fibers 28, 31 are connected directly to the coupler modules 45, 57, 61 or are connected via the optical fibers 55, 64 for coupler connection. It is possible to save a lot of space as compared with the conventional optical distribution board which requires the fiber.
The optical fiber for connection can be prevented from being complicated in the inside, and the workability of switching the presence or absence of line monitoring, the space saving of the optical wiring board 20, the improvement of the number of cores, and the like can be realized.

The present invention is not limited to the above embodiment. The number and types of optical fibers 28 and 31 and the number of optical adapters used in the adapter module 44 and coupler modules 45, 57 and 61 are as follows. Needless to say, it can be changed as appropriate. The termination unit 29 is also applicable to the apparatus-side frame 23 shown in FIG.

[0037]

As described above, according to the optical distribution board of the present invention, one or both selected from the adapter module and the coupler module are incorporated in the termination unit, so that the light beam related to the corresponding optical fiber can be obtained. Since it is possible to easily select the presence or absence of the line monitoring of the road, (b) it is possible to easily select the presence or absence of the line monitoring individually for each optical line in the same termination unit. There is no need to provide a dedicated connection unit for each in the same frame or a separate optical distribution board.
The volume inside the frame can be used efficiently (b)
According to (a), it is possible to eliminate useless space caused by providing a dedicated connection unit and an optical wiring board, to increase the mounting density of adapter modules and coupler modules, and to increase the number of compatible cores. Since both the adapter module and coupler module are detachable from the unit body, the presence or absence of line monitoring can be easily switched by exchanging the adapter module and coupler module. (D) When performing line monitoring Since the optical fiber is connected via the coupler module, the optical fiber for connection between the optical fiber and the coupler module to be connected to each other can be eliminated or shortened. Improvement,
An excellent effect is achieved in that the space for the optical wiring board can be saved and the number of cores can be easily increased.

According to a second aspect of the present invention, when a configuration including a terminating unit in which a plurality of adapter modules or coupler modules are incorporated side by side is adopted, (e)
The effects (a) to (c) are more effectively obtained from the above (a), and in particular, there is an excellent effect that the number of corresponding hearts in (b) is easily increased.

According to a third aspect of the present invention, the optical cable includes one selected from a terminating optical fiber connected to the optical connector adapter of the adapter module or an optical fiber for coupler connection connected to the coupler module. When a configuration is adopted in which a connection module for housing an optical connection portion connected to the optical fiber on the side is detachably incorporated in the termination unit, (f) the optical fiber drawn from the optical cable is connected to the termination optical fiber or coupler. The optical fiber can be easily connected to another optical fiber through an optical connector adapter or a coupler module simply by connecting to the optical fiber for use. Can be stored compactly by the connection module, and the volume inside the frame can be used effectively. , (H) The connection module can be attached to and detached from the termination unit. By selecting use or non-use, it is possible to easily respond to the type of optical fiber (with or without plug termination). An excellent effect is obtained such that it is easy to terminate a fiber so that it can be connected to another optical fiber.

[Brief description of the drawings]

FIG. 1 is an overall front view showing one embodiment of an optical wiring board of the present invention.

FIGS. 2A and 2B are diagrams showing a termination unit applied to the optical distribution board of FIG. 1, wherein FIG. 2A is a side view showing a termination unit to which an adapter module and a connection module are applied, and FIG.
3A is a front view of FIG. 3A, and FIG. 3C is a plan view of FIG.

3A and 3B are diagrams showing an operation of the termination unit of FIG. 2, wherein FIG. 3A is a side view and FIG. 3B is a plan view.

FIG. 4 is a side view showing a termination unit in which an adapter module is selected and assembled, and in which an optical fiber drawn from a cable with a connector is directly connected to an optical connector adapter.

5A and 5B are diagrams showing a termination unit applied to the optical distribution board of FIG. 1, wherein FIG. 5A is a front view showing a termination unit to which a coupler unit and a connection module are applied, and FIG. FIG.

6A and 6B are diagrams showing a termination unit in which a coupler module is selected and incorporated, and FIG. 6A is a front view showing a termination unit to which a coupler module to which an optical fiber drawn from a cable with a connector is directly connected is applied. Figure,
(B) is a side view of (a).

FIG. 7 is a side view showing a termination unit to which a coupler module having an optical fiber for coupler connection drawn directly into a target connection position in an optical distribution board is applied.

8 is a perspective view showing an example of a termination unit applied to a line-side termination portion of the optical wiring board of FIG. 1;

FIG. 9 is a plan view showing a connection module applied to the termination unit of FIG. 8;

10 is a side view showing a termination unit applied to the device-side frame of the optical wiring board of FIG. 1;

FIG. 11 is a front view showing a conventional optical distribution board.

FIG. 12 is a front view showing a conventional optical distribution board in which the number of corresponding cores is increased.

[Explanation of symbols]

Reference Signs List 20: optical distribution board, 21: frame (line side frame), 24: optical cable, 25: optical cable (cable with connector), 28: optical fiber (line side optical cord), 29: termination unit, 31: light Fiber (line side optical cord), 3
3 ... Another optical fiber (jumper cord), 42 ... Core selection device, 43 ... Unit body, 44 ... Adapter module, 44a ... Optical connector adapter, 45 ... Coupler module, 45b ... Monitoring terminal, 49 ... Termination light Fibers (terminated optical cords), 50 ... optical connection parts (fusion connection parts), 52 ...
Connection module, 55: Optical fiber (optical cord) for coupler connection, 56: Connection terminal, 57: Coupler module, 5
7a: monitoring terminal, 60: connection terminal, 61: coupler module, 61a: monitoring terminal, 63: connection terminal.

Claims (3)

[Claims] An optical fiber (28, 31) drawn from an optical cable (24, 25) is separated from another optical fiber (33).
One or a plurality of termination units (29) connected to the optical cable are housed in a frame (21), and the termination unit is configured to switchably connect an optical fiber on the optical cable side to another optical fiber. Adapter module (4) incorporating (44a)
4) and one or both of a coupler module (45, 57, 61) for switchably connecting the optical fiber on the optical cable side and another optical fiber via a built-in optical coupler can be detachably mounted. The coupler module is connected to a line monitoring device that sends test light to an optical fiber connected via the optical coupler and monitors an optical line related to the optical fiber. The optical distribution board (20), further comprising a monitoring terminal (45b, 57a, 61a) connected to the connection terminal (56, 60, 63) of the core selection device (42). 2. The optical distribution board according to claim 1, further comprising a termination unit in which a plurality of adapter modules or coupler modules are incorporated side by side. 3. A terminated optical fiber (49) terminated to be connectable to an optical connector adapter of the adapter module.
Alternatively, a connection module (52) that houses an optical connection portion (50) that connects one selected from a coupler connection optical fiber (55) connected to the coupler module and an optical fiber on the optical cable side is connected to the termination unit. 3. The device according to claim 1, wherein the device is detachably incorporated in the device.
Optical distribution board as described.