JP2001128199A - Optical distributing board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To develop a technology by which the number of corresponding cores can be adjusted freely and the presence/absence of line monitoring and branched connection can be selected freely. SOLUTION: The optical distributing board 20 is provided with a plurality of termination units 21 each of which has a cable fixing section 27 and a connector array section 21b in which a plurality of optical connectors 311 which terminate cable-side optical fibers 28 led out from the terminals of optical cables 26 in such a way that the fibers 28 can be connected to switching optical fibers 29 through connectors and one or more optical parts units 61 which interpose optical parts to optical lines between the optical fibers 28 and 29 by being interposed, through connector-connection, between inter-unit optical fibers 293 connected to the optical connectors 311 of the connector array sections 21b and switching optical fibers 29.

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 for switchably connecting a plurality of cable-side optical fibers on an optical cable side to an optical fiber which can be connected to a connector by an optical connector.

[0002]

2. Description of the Related Art FIG. 7 is a front view showing a conventional optical distribution board. In FIG. 7, 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 connected to a transmission device,
There is an external optical cable side. These optical cables 2
Is disposed along the side plate 10 of the box 1 and is fixed at a branch portion 4a at the lower part of the box 1 by a cable clamp 4b or a tension member clamp 4c, and is led out to draw out the optical fiber core 3a. These optical fiber cords 3a are drawn into the fusion part tray storage part T1 at the lower part of the housing 1, and are of a drawer type stacked and stored in multiple stages in the slide unit 12 provided in the fusion part tray storage part T1. It is distributed and stored in the fusion part trays 6, 6,. In each of the fusion trays 6, 6,..., The optical fiber core wire 3a and one end of the branch-out fan-out cord 3b, which is not branched, are connected via a fusion splicing reinforcement (not shown).

[0003] The fan-out code 3b is pulled out upward through a center tray 9 installed above the fusion part tray storage 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, It is connected to a jumper cord j (optical cord) introduced into the branch connection tray 8 from the right side so as to be switchable via an optical connector (not shown). The branch connection trays 8, 8,... Are guided by guide rods 15 protruding from the back plate 11 of the box 1 to move in the front-rear direction (the depth direction in FIG. 7).
It can be pulled out and stored. Jumper code j
Is connected 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 the branch connection tray storage part T2
It is housed in the tray 8 inside, or it is bent and absorbed by using the support 4 (cord clamp) on the side surface of the box 1 so that the portion hanging down is folded upward. When both ends of the jumper cord j are connected to the fan-out cord 3b in the branch connection tray 8, the optical lines on the transmission apparatus side and the external optical cable side are connected via the jumper cord j. Also, in the branch connection tray 8, the wiring 3d (optical code) introduced into the case 1 from the wiring wiring storage trays 9a and 9b arranged on the upper and lower parts of the case 1, the fan-out code 3b, and the like. May be connected.

[0004]

By the way, in the optical distribution board of FIG. 7, the maximum number of supported cores is set in advance, but if the actual number of processed cores is smaller than the number of supported cores, the previously installed cable is required. Clamp 4b and tension member clamp 4
c, fusion part tray storage part T1, branch connection tray storage part T2
However, there is a problem that the cost is high due to waste. Further, it is common to select and use an optical distribution board having an appropriate number of cores corresponding roughly to the actual number of cores to be processed. There arises a problem that it becomes impossible to cope with the addition of a circuit after the optical distribution board is assembled. Also, for example, the optical cables 2 on the transmission device side and the outside line side are respectively added, and
The optical fibers 3a drawn from these optical cables 2
In order to connect them, it takes time and effort to wire a large number of fan-out cords 3b and the like corresponding to the added optical cables 2, and furthermore, fusion splicing of the optical fibers 3a and addition of the fan-out cords 3b. It is necessary to proceed with the work carefully so as not to affect the optical fiber and the optical connection part of the existing line, and there is a problem that the workability is reduced. Further, regarding the optical lines on the transmission device side and the outside line side,
In order to perform line monitoring using an optical pulse tester or branch connection using an optical splitter, an optical fiber for connecting to the optical pulse tester is installed in the optical line connecting the transmission device side and the external line side. It is necessary to interpose a branching optical coupler or an optical splitter, and the optical wiring becomes more complicated,
Moreover, it takes enormous effort to increase or decrease the number of lines. In addition, if it is necessary to switch between the presence or absence of line monitoring and the presence or absence of branch connection for each line, there is no appropriate technology, and this development has been awaited.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and (1) corresponding processing is performed on a termination unit basis which can independently perform processing from fixing of an optical cable to termination of a connector of a cable side optical fiber. (2) An optical component such as an optical coupler or an optical splitter is interposed between the cable-side optical fiber and the switching optical fiber that can be connected to the connector by the termination unit. (3) By switching the coupler module and the splitter module in the optical component unit, it is possible to easily switch the monitoring of the disconnection of the optical line and the like and the switching of the cable side optical fiber to the presence or absence of the branch connection to the optical fiber. It is an object of the present invention to provide an optical wiring board that can be used.

[0006]

The present invention has the following features to attain the object mentioned above. That is, the present invention provides a plurality of cable-side optical fibers on the optical cable side,
An optical distribution board switchably connected to a switching optical fiber, which is another optical fiber terminated to be connectable to a connector by an optical connector, wherein the cable is fixed to fix the optical cable, and is pulled out from the optical cable terminal. A plurality of termination units each including a connector arrangement portion in which a plurality of optical connectors terminating the cable-side optical fiber so as to be connectable to the switching optical fiber are arranged. The inter-unit optical fiber switchably connected to the cable-side optical fiber via the optical connector and the switching optical fiber are detachably connected to each other by a connector, so that an optical coupler or an optical coupler is provided between these two optical fibers. It is characterized by comprising one or more optical component units in which optical components such as splitters are interposed. This optical distribution board collects a plurality of termination units,
In addition to this, one or more optical component units are also assembled. Termination units and optical component units are laminated,
An optical distribution board is formed by appropriately connecting such as side by side connection. Each termination unit can perform independently from the fixing of the optical cable by the cable fixing part to the termination of the cable-side optical fiber that can be connected to the connector by the optical connector of the optical module. By adding the terminal units, operations such as termination of the cable-side optical fiber can be performed without affecting other terminal units.

In the termination unit, the switching connection between the switching optical fiber and the cable-side optical fiber can be switched simply by switching the connection of the switching optical fiber to the optical connector in the connector arrangement portion. The inter-unit optical fiber is used to connect between the optical connector of the connector arrangement part of the termination unit and the optical component unit, connect the switching optical fiber to the optical component unit, and connect both optical fibers via the optical component unit. Then, optical components such as an optical coupler and an optical splitter are interposed between the cable-side optical fiber and the switching optical fiber. When the inter-unit optical fiber is removed and the switching optical fiber that has been disconnected from the optical component unit is connected to the optical connector of the connector array, the connection state returns to the connection state in which the optical component provided in the optical component unit is not interposed. This makes it possible to easily select and switch between a connection mode in which an optical component is interposed and a connection mode in which no optical component is interposed. The connection between the optical component unit and the switching optical fiber can be of various configurations including fusion splicing, but the switching optical fiber for the optical connector and the optical component unit of the connector arrangement portion of the termination unit. It is preferable to use a connector connection in view of the switching connectivity.

According to a second aspect of the present invention, in the optical wiring board according to the first aspect, the optical component unit can accommodate the coupler module accommodating the optical coupler and the splitter module accommodating the optical splitter interchangeably. The coupler module includes an optical connector adapter to which the switching optical fiber is detachably connected, and an optical connector adapter to which the inter-unit optical fiber is detachably connected, and connects these two optical connector adapters. A monitoring optical fiber which is branched from the optical line via the optical coupler interposed therebetween and connected to an optical pulse tester, and wherein the splitter module has the switching optical fiber attached and detached. An optical connector adapter that is removably connected, and an optical connector adapter that removably connects the inter-unit optical fiber. A plurality of light beams on the other optical connector adapter side with respect to the optical line on the other optical connector adapter side by interposing the optical splitter in the middle of the optical line connecting the two optical connector adapters. The road is branched and connected. According to this optical distribution board, line monitoring and branch connection can be easily realized by selectively using the coupler module and the splitter module. The connection of the switching optical fiber and the inter-unit optical fiber to the coupler module and the splitter module is made by the optical connector adapter, so that the optical connector of the connector arrangement part of the termination unit and the optical module of the optical component unit are connected. Switching connection of the switching optical fiber to the optical connector adapter is easy.
When the monitoring optical fiber of the coupler module is connected to the optical pulse tester, the cable-side optical fiber and the switching optical fiber connected to the coupler module are connected to the optical pulse tester so that test light can enter. As is well known, an optical pulse tester monitors the break of an optical line or the like (so-called “line monitoring”) by observing return light of test light incident on an optical line. Line connection can be monitored simply by connecting the switching optical fiber that requires line monitoring to the coupler module. on the other hand,
In the splitter module, any of a configuration in which a plurality of cable-side optical fibers are branched and connected to a switching optical fiber and a configuration in which a plurality of switching optical fibers are branched and connected to a cable-side optical fiber can be adopted. . Of the cable-side optical fibers and switching optical fibers, those that require a branch connection are simply connected to the splitter module to achieve the desired branch connection.

According to a third aspect of the present invention, in the optical distribution board according to the second aspect, the splitter module has an optical connector adapter to which the switching optical fiber is connected and an optical connector to which the inter-unit optical fiber is connected. An optical coupler for branching a monitoring optical fiber connected to an optical pulse tester from an optical line between the connector adapter and the optical pulse tester is housed. In the splitter module according to this optical distribution board, in addition to the branch connection between the cable-side optical fiber and the switching optical fiber, the line monitoring of the optical line related to the cable-side optical fiber and the optical line related to the switching optical fiber is simultaneously performed. realizable.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An optical distribution board 20 according to an embodiment of the present invention will be described below with reference to FIGS. 1 (a), 1 (b) and 1 (c) to FIG. 1 (a), 1 (b) and 1 (c), the optical distribution board 20 includes a plurality of termination units 21, an optical component unit 61 and a line monitoring unit 23 in multiple stages (in this embodiment, the termination unit is 5-stage, optical component unit 21A
And the track monitoring unit 23 is stacked in one stage.

FIGS. 2A and 2B are diagrams showing the termination unit 21. FIG. 2A is a plan view, FIG. 2B is a front view, and FIG. 2C is a side view showing a stored state of the optical module 31. FIG.
As shown in (a), (b) and (c), each termination unit 21 includes a frame-like frame 22, a cable fixing portion 27 for fixing an optical cable 26 drawn into the frame 22, A module housing section 30 for housing an optical module 31 that terminates the cable side optical fiber 28 pulled out from the terminal of the optical cable 26 so as to be connectable to the switching optical fiber 29 by a connector is provided.

As shown in FIGS. 2B and 2C, the frame 22 is provided with an attachment 22a for positioning and fixing the lower termination unit 21 to the frame 22. Thus, the stacked upper and lower termination units 21 are stably connected without any positional deviation. Attachment 22 of upper termination unit 21
The fixing between the terminal a and the frame 22 of the lower termination unit 21 is performed by a simple fixing means such as a bolt. As shown in FIG. 1, the optical component unit 61 and the track monitoring unit 23 are also unitized by storing various devices in frame-shaped frames 61a and 23a. FIG.
As shown in (a) and (b), the frame 61a of the optical component unit 61 can be connected to the frame 22 of the termination unit 21 and the frame 23a of the line monitoring unit 23 by an attachment 61b, and is not shown. The frame 23a of the track monitoring unit 23 can also be connected to the frame 22 of the termination unit 21 by an attachment. The optical component unit 61 and the line monitoring unit 23 can be stacked similarly to the termination unit 21.
In FIG. 1, the installation positions are all located below the optical distribution board 20, but are not limited thereto.
It may be between the termination units 21 stacked in multiple stages.

An optical cable 26 drawn into each of the termination units 21 constituting the optical distribution board 20 is introduced from a cable introduction unit 34 provided at the lowermost stage or the uppermost stage (the lowermost stage in FIG. 1), and is intended for termination. It is drawn in to the unit 21. On the side of each termination unit 21, the side of the optical component unit 61, and the side of the line monitoring unit 23, cable introduction portions 21a, 61c, and 23b (cable introduction spaces) through which the optical cable 26 can be passed are provided. Is provided. The cable introduction part 21 of each laminated termination unit 21, optical component unit 61, and line monitoring unit 23
1a, 61c, and 23b are communicated with each other, and in FIG. 1A, they are continuous from the cable introduction unit 34 at the lower end of the optical distribution board 20 to the span wiring unit 50 at the upper end of the optical distribution board 20. Cable introduction part 21
By using a, 61c, and 23b, the optical cable 26 can be efficiently drawn into the intended termination unit 21. The span wiring unit 50 receives an optical fiber that is wired so as to pass between optical distribution boards or the like.
The optical fiber 50a drawn into the optical distribution board 20 from the inter-unit wiring unit 50 becomes a switching optical fiber. In the cable introduction unit 34, the optical cable 25, 2
6 for fixing the optical fiber 6 and holding it against the tensile force, etc.
No external force such as tensile force acts on 8, 29.

The optical cable 26 drawn into the termination unit 21 is fixed by a cable fixing portion 27, and a cable-side optical fiber 28 is drawn from a terminal. The cable fixing portion 27 includes a gripping mechanism that grips and fixes the outer side of the jacket near the optical cable 26 terminal, a binding device 27a that fixes the frame 22 with a binding force, and the like, and a tension member 26a that is exposed to the optical cable 26 terminal. And a tension member clamp 27b to be fixed. Cable fixing part 27
May be attached to the frame 22 in advance, or may be added later together with the installation of the termination unit 21 at a predetermined position.

As the cable-side optical fiber 28, an optical fiber core such as a single-core or multi-core optical fiber tape is generally used. For example, an optical cord drawn from a cable terminal can be used. is there. In the present embodiment, multi-core optical fiber tapes such as 4-core and 8-core are exemplified. On the other hand, the switching optical fiber 29 is an optical cord whose end is terminated by an optical connector 29a (optical connector plug) so as to be connectable to a connector.
An optical cord drawn out from an optical cable 25 such as a cord cable drawn from a cable, an optical cord drawn directly from the cable introduction unit 32, or an optical fiber core drawn out from an optical cable terminal coated with a tube is used. Is done. Note that the optical fiber 50a drawn from the inter-connector wiring unit 50 is also terminated by the optical connector 29a so as to be connectable to the connector. Optical connector 29a
For example, an SC type optical connector (Single fiber Coupling optical fi
ber connector), SC2 type optical connector, JIS C
MU-type optical connector (Miniature-Un
Optical connector plugs such as it couplimg optical fiber connector) are employed. An optical connector adapter 311 attached to the side of the optical module 31 housed in the termination unit 21 and an optical connector attached to the side of the optical modules 32 and 33 (described later in detail) housed in the optical component unit 61. Adapters 321, 322, 331, 33
As 2, a connector to which the optical connector 29 a can be connected is adopted. Note that it is advantageous to use the SC2 type optical connector in terms of improvement in mounting density due to miniaturization, workability of switching connection, and the like.

As shown in FIGS. 2A, 2B and 2C, the cable side optical fiber 28 is
From the front side of the termination unit 21 (the lower side of the paper in FIG.
2B via the optical fiber wiring portion 21c (wiring space) on the rear side of the termination unit 21 facing the front side of FIG. 2B and the left side of FIG. Is drawn into the surplus length absorbing portion 21d (wiring space) facing the terminal unit 2 and further from the front side of the terminal unit 21 via the lower side of the module storage unit 30.
1 is pulled out to the back side, from which module storage unit 3
The optical module 31 is drawn into a target one of the optical modules 31 stored in the optical module 31. In the optical module 31, the cable-side optical fiber 28 is terminated by the optical connector 311 so as to be connectable to each other by connecting the optical fibers internally.

The module storage section 30 stores the module table 3
0a and its surrounding members (such as the code duct 21f) are unitized, and the optical module 31 is mounted on the module base 30a, with the hinge 35 provided on the extra length absorbing portion 21d as the center. The horizontal rotation allows the frame 22 to be pulled out to the front side (FIG. 2).
(B) Middle virtual line). When the module storage section 30 is pushed into the frame 22, the lock piece 30b on the module storage section 30 side is engaged with the catch mechanism 22 on the frame 22 side.
2b (see FIG. 2C), the module storage unit 30 does not inadvertently jump out of the frame 22 unless the forcible pull-out operation is performed again. Also, the engagement piece 30f provided at the lower part of the module base 30a is engaged with an engagement projection (not shown) on the frame 22 side so as to be detachable, thereby maintaining the storage state of the module storage unit 30 in the frame 22. Contribute.

The module storage unit 3 from the excess length absorption unit 21d
The wiring of the cable-side optical fiber 28 to the lower side (lower side of the module base) passes through the vicinity of the hinge 35, so that the movement due to the rotation of the module storage unit 30 around the hinge 35 is reduced. A curved radius (R30 or more) exceeding a specified value that does not affect characteristics can always be stably secured. It is preferable that the cable-side optical fiber 28 is hardly bent sharply by covering the tube from the end of the optical cable 26 to the lower side of the cable housing portion 30. On the back side of the termination unit 21, the cable-side optical fiber 28 is connected to the clip 22 fixed to the frame 22.
c, the portion held by the clip 22c does not move even when the module storage unit 30 is pulled out, and when the module storage unit 30 is returned into the frame 22, the cable-side optical fiber 28 is appropriately It is bent and returns to the bent wiring state before the module storage unit 30 is pulled out, so that sudden bending or the like does not occur.

On the other hand, the switching optical fiber 29 also extends from the excess length absorbing portion 21d via the cord clamp 21e provided near the hinge 35 to the front side of the module storage portion 30 (frontward in the drawing direction from the tip unit 21). Is introduced into a cord duct 21f provided in a substantially horizontal gutter shape, and a portion between the cord clamp 21e and the cord duct 21f is routed near the hinge 35.
The movement of the module storage unit 30 around the hinge 35 due to the rotation is small, and the radius of curvature equal to or greater than the specified value can be stably maintained. Further, by being detachably clamped by the cord clamp 21e, a slight movement or the like due to the rotational movement of the module storage unit 30 is prevented from affecting the switching optical fiber 29 in the extra length absorbing unit 21d. In addition,
In the extra length absorbing portion 21d, a large number of switching optical fibers 29 are arranged and wired by using frame-shaped code guides 21g and 21h fixed to the frame 22. In addition, as shown in FIG. 1C and FIGS. 2A and 2B, by bending the switching optical fiber 29 by the bending member 21i, the extra length of the switching optical fiber 29 is absorbed. . Further, as shown in FIG. 1A, the excess length absorbing portions 21 of each of the plurality of termination units 21 which are stacked with their front faces aligned.
d communicate with each other, and the surplus length absorbing portion 61f of the optical component unit 61 and the optical fiber wiring portion 23e of the line monitoring unit 23 also communicate with the surplus length absorbing portion 21d of the termination unit 21. By using the sections 23d and 61f and the optical fiber wiring section 23e, the switching optical fiber 2
9 and the lead-in to the target units 21 and 61 can be performed in an orderly and efficient manner.

As shown in FIGS. 2 (a), 2 (b) and 2 (c), the module storage section 30 stores a plurality of optical modules 31 formed in a thin external appearance case, arranged vertically. The optical module 31 includes a module base 30a.
A guide portion such as a guide groove 30e which is mounted on the module base 30a and extends from the back side (the side facing the front side; upper side in FIG. 2A, right side in FIG. 2C) on the module base 30a toward the front side. Are respectively positioned. The optical module 31 is provided with a guide piece inserted into the guide groove 30e. Each optical module 31 is inserted into the module storage unit 30 from the back side of the module storage unit 30 exposed to the front side of the termination unit 21, that is, inserted along the guide portion of the module base 30 a. Is stored. Then, the inserted optical module 31,
When the main body portion of the optical module 31 abuts against the terminal plate 30c fixed to the front side of the module storage section 30, the optical module 31
The optical connector adapter 311 protruding from the side is positioned in the connector array portion 21b, which is the area on the front side of the module storage section 30 (the area along the terminal plate 30c). The optical module 31 housed in the module housing part 30 can be taken out by pulling it out to the rear side of the termination unit 21. As a result, the taken-out optical module 31 is opened to accommodate the cable-side optical fiber 28,
Operations such as termination and removal can be performed. When the completed optical module 31 is stored in the module storage section 30, the optical connector 311 can be positioned in the connector array section 21b.

The multiple optical connector adapters 311 arranged in the connector arrangement section 21b have module storage sections 30.
The switching optical fiber 29 drawn into the front side is connected to a switchable connector. The switching optical fiber 29 is pulled up at an appropriate place from the code duct 21f and connected to the optical connector adapter 311 of the target optical module 31. When the switching optical fiber 29 is connected to the target optical connector adapter 311 of the optical module 31, the connection between the cable side optical fiber 28 and the switching optical fiber 29 is established. By simply switching the connection of the switching optical fiber 29 to the optical connector adapter 311, the connection between the cable-side optical fiber 28 and the switching optical fiber 29 is switched. The switching optical fiber 29 pulled up from the code duct 21f is moved from the vicinity of the terminal plate 30c to the module housing 3
By holding the cord support 30d protruding to the front side so as to be able to be taken out, the bundle is bundled in units of optical modules 31. Therefore, even if a large number of switching optical fibers 29 are wired on the front side of the module storage unit 30, There is no inconvenience such as the switching optical fibers 29 being entangled.

As shown in FIGS. 3 (a) and 3 (b), the optical component unit 61 is an optical module 3 having a thin external case shape.
2, 33 are vertically arranged on the module base 61d, and are arranged and stored in a plurality of rows. Of the optical module 31,
The optical module 32 is a coupler module that houses an optical coupler 32a, and the optical module 33 is an optical splitter 33.
a is a splitter module that stores a. These optical modules 32 and 33 are housed so as to be inserted from the front side (the left side in FIG. 3B) of the optical component unit 61 toward the rear side.
1. Easy to take out by pulling out from the front side. Thus, in the optical component unit 61, the coupler module 32 and the splitter module 33 can be housed interchangeably. The optical modules 32 and 33 housed in the optical component unit 61 are:
Positioning is performed by guide means such as guide grooves 61e formed in the module base 61d. Coupler module 32
Two optical connector adapters 321 and 322 provided on the front side facing the front side of the optical component unit 61;
The two optical connector adapters 331 and 332 provided on the front face of the splitter module 33 facing the front face of the optical component unit 61 are each provided with the optical component unit 6.
1 and are arranged side by side.

FIGS. 4A and 4B show an example of the coupler module 32. FIG. 4A is a left side view, FIG.
(C) is a right side view, and (d) is a cross-sectional view taken along line AA of (a). The coupler module 32 shown in FIGS. 4A to 4E includes an optical fiber 32b which is an optical line connecting the two optical connector adapters 321 and 322, and an optical coupler 32a interposed in the optical fiber 32b. Is housed in a thin-plate tray-shaped module body 32c. The monitoring optical fiber 32d branched from the optical fiber 32b via the optical coupler 32a is drawn out of the coupler module 32 from a drawing hole 32e on the front face of the coupler module 32 directed to the front side of the optical component unit 61. The monitoring optical fiber 32d is connected to the extraction hole 3
It is retained by a retaining portion 32u provided in the vicinity of 2e so that a tensile force or the like acting on the monitoring optical fiber 32d outside the module main body 32c does not affect the internal optical fiber and the like.

The module main body 32c is made of a resin such as plastic, and optical component holders 32g, 3g, 3e which hold optical components such as the optical coupler 32a and the optical filter 32f so as to be taken out by projecting walls provided in the module main body 32c.
It is common that the whole including 2h is integrally formed.
One side of the module main body 32c (the left side in FIG. 4; see FIGS. 4B and 4D) is a detachable lid 32.
Opening / closing is enabled by i. 4 (a), (b),
In (c), the guide piece 32j projecting from the lower part of the coupler module 32 is inserted into the guide groove 61e of the module base 61d and slidably moved, so that the insertion and withdrawal from the optical component unit 61 can be smoothly performed. To do. The optical fibers 32b and 32d housed in the module main body 32c are formed by a curved wall 32 protruding from a substrate portion 32o forming an outer wall of the module main body 32c.
P and 32q and the like are used to be stored in a curved state, and are pressed between the curved wall 32p and 32q and the substrate portion 32o by pressing pieces 32r protruding from the curved walls 32p and 32q, thereby preventing unnecessary vibration and the like.

FIGS. 5A and 5B show an example of the splitter module 33. FIG. 5A is a left side view, FIG. 5B is a front view, FIG. 5C is a right side view, and FIG. FIG. 3 is a sectional view taken along line BB. External appearance of the splitter module 33 shown in FIGS.
In e, optical fibers 33b and 33c, which are optical lines connecting the two optical connector adapters 331 and 332, an optical splitter 33a interposed between the optical fibers 33b and 33c, and an optical splitter 33a via the optical splitter 33a. Optical fibers 3 branched and connected to the optical fiber 33b
The optical coupler 33e provided in the middle of each of 3c is housed. A plurality of optical fibers 33c constituting an optical line on the other optical connector adapter 332 side are branched and connected to an optical fiber 33b constituting an optical line on one optical connector adapter 331 side via an optical splitter 33a. . According to the number of branches of the optical line by the optical splitter 33a, the number of the installed optical connector adapters 332 is larger than that of the other optical connector adapter 331 (in FIG. 5B, the optical connector adapter 331 is used). , While the number of optical connector adapters 332 is four).

From the optical fiber 33c to the optical coupler 33e
The monitoring optical fiber 33f branched through the optical fiber unit 33 is connected to the splitter module 3 through a drawing hole 33g on the front face of the splitter module 33 which is directed toward the front side of the optical component unit 61.
3 Pulled out. Monitoring optical fiber 33f
Is retained by a retaining portion 33v provided in the vicinity of the drawing hole 33g, so that a tensile force or the like acting on the monitoring optical fiber 33f outside the module main body 33d does not affect the internal optical fiber or the like. I have.

The module main body 33d is made of a resin such as plastic, and optical component holders 32i, 3i and 3h for holding optical components such as the optical coupler 33a and the optical filter 32h so that they can be taken out by projecting walls provided in the module main body 33d.
Usually, the entire structure including the 3j and the curved walls 33r, 33s, 33t and the like is integrally formed. One side of the module main body 33d (the left side in FIG. 4; FIG. 5B,
(See (d)) can be opened and closed by the lid 33k. 5 (a), 5 (b) and 5 (c), a guide piece 33m protruding from the lower portion of the splitter module 33.
Is inserted into the guide groove 61e of the module base 61d and slid so as to smoothly insert and pull out the splitter module 33 with respect to the optical component unit 61. The optical fibers 33b, 33c, and 33f accommodated in the module main body 33d are curved and accommodated by using curved walls 33r, 33s, and 33t and the like protruding from a substrate 33q that forms an outer wall of the module main body 33d. Pressing pieces 33u protruding from the curved walls 33r, 33s, 33t are pressed between the curved portions 33r, 33s, and 33t and the substrate portion 32o, thereby preventing unnecessary vibration and the like.

As shown in FIGS. 3 (a) and 3 (b), a monitoring optical fiber pulled out from the upper end (upper in FIGS. 3 (a) and 3 (b)) of the coupler module 32 and the splitter module 33. 32d and 33f are optical component units 6
1 is connected to a connection terminal (not shown) of the optical fiber selection device 24 mounted in the device 1. Optical fiber selection device 24
Are disposed above the coupler module 32 and the splitter module 33 housed in the optical component unit 61, so that the monitoring optical fibers 32d and 33f are pulled upward, and the optical fiber selecting device 24
Connected to. The optical fiber selector 24 is connected to an optical pulse tester 23c mounted on the line monitoring unit 23 via an optical fiber 23d.
A plurality of monitoring optical fibers 32d, 3d
3f is selectively connected.

The thickness of the coupler module 32 is two-thirds that of the splitter module 33. The arrangement pitch of the guide grooves 61e on the module table 61d of the optical component unit 61 is half the thickness of the coupler module 32. It is. Therefore, for example, when the arrangement pitch of the guide grooves 61e is one pitch, the thickness dimension of the coupler module 32 is exactly two pitches, and the thickness dimension of the splitter module 33 is just three pitches. For this reason, the optical component unit 61
Then, the coupler module 32 and the splitter module 3
3 can be stored without gaps, and the mounting density can be improved.

FIG. 6 is an optical wiring diagram showing the optical wiring in the optical wiring board 20. In FIG. 6, each optical module 3
1, 32, 33 optical connector adapters 311, 321,
As the switching optical fiber 29 connected to 331, an optical fiber on the transmission device 51 side (hereinafter, “device-side optical fiber”).
An optical cord) and an optical fiber which is a jumper cord between the optical connector adapters 311 exist. For convenience of explanation, these optical fibers have different reference numerals 291 and 291 for distinction.
292 is attached. The optical fiber 292, which is a jumper cord, connects between the optical modules 31.
Both ends thereof are connected by an optical connector 29a connectable to the optical connector adapter 311 so that a connector can be connected. In addition, switching optical fibers 291, 29
Apart from the optical fiber unit 2, there is an inter-unit optical fiber 293 that is wired between the termination unit 21 and the optical component unit 61 and connects the optical module 31 to the coupler module 32 and the splitter module 33. The inter-unit optical fiber 293 is a jumper cord having optical connectors 293a at both ends, and includes an optical connector adapter 311 of the optical module 31 and optical connector adapters 322 and 33 of the coupler module 32 or the splitter module 33.
2 is removably connected to the connector.

As shown in FIG. 2C and FIG. 6, the cable-side optical fiber 28 drawn into the optical module 31
Is connected to the optical fiber 31a built in the optical module 31, and the excess length is stored in a curved manner. One end of the optical fiber 31a connected to the cable-side optical fiber 28 is a multi-core optical fiber having the same number of cores as the cable-side optical fiber 28, but the other end that is branched into a single core via the branch portion 31b is It is connected to the optical connector adapter 311. As a result, the cable side optical fiber 28 becomes the optical fiber 31a.
Through the optical connector adapter 311 to be connected to the switching optical fibers 291 and 292 in a connector-connectable manner.
In the termination unit 21, switching optical fibers 291 and 292
When the switching connection to the optical connector adapter 311 is performed, the switching connection between the switching optical fibers 291 and 292 and the cable side optical fiber 28 can be performed. Further, as the optical connector 29a at the tip of the switching optical fibers 291 and 292, SC
When a type optical connector or SC2 type optical connector is employed, the switching connection is made in a single core unit. The single-branched tip of the optical fiber 31a is connected to the optical connector 31d.
, The connection to the optical connector adapter 311 is simple, and since the connection is switchable, the optical connector adapter 311 to be connected can be selected.

In FIG. 2 (c) and FIG. 6, the cable side optical fiber 28 and the optical fiber 31a are connected via the fusion splicing part 31c. In order to cope with the optical fiber 28, an end which is connected to the cable-side optical fiber 28 and which can be connected with a multi-core optical connector is adopted as the optical fiber 31a on the optical module 31 side. And the optical connector at the end of the cable-side optical fiber 28 by the connector connection,
The two optical fibers 28 and 29 can be connected. In this case, the connection operation is simpler than the fusion splicing, and the operation time can be reduced.

The switching optical fiber 29 is connected to the coupler module 3
2 optical connector adapter 321 and the optical connector adapter 311 of the optical module 31 and the coupler module 3
2 is connected via the inter-unit optical fiber 293, the cable side optical fiber 28 and the switching optical fiber 29 are connected via the coupler module 32, and both optical fibers 28, 29 are connected. An optical coupler 32a is interposed therebetween. The monitoring optical fiber 32d branched via the optical coupler 32a is connected to the optical fiber selecting device 24 so that the optical fiber selecting device 2
At 4, the optical fiber 23d is connected to the optical fiber 23d on the side of the optical pulse tester 23c ("OTDR" in FIG. 6). Thereby, the optical line on the cable side optical fiber 28 side and the switching optical fiber 29
The test light output from the optical pulse tester 23c can be made incident on the optical lines 1, 292 side. The optical pulse tester 23c monitors disconnection and the like of each optical line based on the observation result of return light that has entered test light such as an optical pulse having a predetermined wavelength into the optical line (line monitoring). Noise light is cut off by an optical filter 32f interposed between the optical connector 32k at the tip of the optical fiber 32b built into the coupler module 32 and switchably connected to the optical connector adapter 321 and the optical coupler 32a. Therefore, the accuracy of the return light observation by the optical pulse tester 23c can be improved. The optical fiber 3
The tip connected to the optical connector adapter 322 of 2b is switchably connected by the optical connector 32m. Therefore, since both ends of the optical fiber 32b are connected to the optical connector adapters 321 and 322, respectively, it is easy to select or change the optical connector adapters 321 and 322 to be connected.

From the optical coupler 32a, an optical line on the cable side optical fiber 28 side and switching optical fibers 291 and 29 are provided.
The monitoring optical fiber 3 corresponding to each of the two optical lines
2d is drawn out, and each monitoring optical fiber 32d is terminated by an optical connector 32n so as to be connectable to a connector.
The connection terminals are switchably connected to the plurality of connection terminals. Then, in the optical fiber selecting device 24, the optical pulse tester 2
By switching the connection of the optical fiber 23d on the 3c side to the optical fiber 32d, test light can be individually incident on a target optical line, and the line can be monitored.

Incidentally, as the optical coupler 32a, a coupler corresponding to multiple cores such as 8ch WINC is adopted corresponding to the number of cores of the optical connector adapters 321 and 322.
Each optical fiber 32 drawn from this optical coupler 32a
d is also a multi-core optical fiber having the same number of cores as the cable-side optical fiber 28. In this case, in the optical fiber selection device 24, the optical fiber 23d on the optical pulse tester 23c side is switched and connected to a plurality of optical lines on the optical fiber 32d side in a single fiber unit. The monitoring optical fiber 32d may be a single-core optical fiber.

The switching optical fibers 291 and 292 are connected to the optical connector adapter 331 of the splitter module 33, and a plurality of inter-unit optical fibers are connected between the optical connector adapter 311 of the optical module 31 and the optical connector adapter 332 of the splitter module 33. When the connection is made via the cable 293, the cable side optical fiber 28 and the switching optical fiber 29 are connected via the splitter module 32 (specifically, connection via the optical fibers 33b and 33c), and the switching optical fiber 291 is connected. , 292 are branched and connected via an optical splitter 33a to form a PDS line. For example, a plurality of cable-side optical fibers 28
Are split and connected via the optical splitter 33a of the splitter module 33, a plurality of optical lines on the optical cable 26 side are split and connected to the same line on the transmission device 51 side.

From the middle of each optical fiber 33c,
A monitoring optical fiber 33f corresponding to each of the optical line related to the cable-side optical fiber 28 and the optical lines related to the switching optical fibers 291 and 292 is branched via the optical coupler 33e. Connected. As the optical coupler 33e and the monitoring optical fiber 33f, a WINC or a multi-core optical fiber corresponding to multiple cores is employed according to the number of cores of the optical connector adapter 332. In FIG. 3, the optical fiber 33f is also terminated by the optical connector 33n so as to be connectable to the connector, similarly to the optical fiber 32d of the coupler module 32, so that it can be easily connected to the connection terminal of the optical fiber selection device 24. Switching connection is enabled. Optical fiber 3
When 3f is connected to the optical fiber selecting device 24, each optical line of the cable side optical fiber 28 and the switching optical fibers 291 and 292 related to this optical fiber 33f can be monitored in a unit of single fiber. A single-core optical fiber can be adopted as the monitoring optical fiber 33f. In addition, the optical fiber 33b,
33c are optical connectors 33o and 33p at the tip, respectively.
Can be switched and connected to the optical connector adapters 331 and 332.
1 is easy to select and change.

In the optical fiber selecting device 24, the optical fiber 23a on the optical pulse tester 23c side is switched and connected to the optical fibers 32d and 33f drawn from the coupler module 32 and the splitter module 33 in a unit of single fiber. Since the switching connection and the incidence of the test light from the optical pulse tester 23c are sequentially and continuously performed on a large number of optical lines connected to the optical fiber selecting device 24 and are repeatedly performed, substantially, The constant monitoring of the optical line connected to the optical fiber selecting device 24 is realized. Since the noise light is cut by the optical filter 33h disposed in the middle of the optical fiber 33f of the splitter module 33, the return light observation by the optical pulse tester 23c can be performed with high accuracy.

The connection terminals of the optical fiber selection device 24 are arranged so as to be connectable to the optical connector at the tip of the cable-side optical fiber 28 pulled out from the optical cable with a connector or the optical connector at the tip of the optical fiber fused to the optical fiber 28. In this case, the cable-side optical fiber 28 can be directly connected to the optical fiber selection device 24 to monitor the line, whereby the optical line related to the cable-side optical fiber 28 can be formed before the optical distribution board 20 is completed. A disconnection can be efficiently found in advance. An optical connector provided at the end of the cable-side optical fiber 28, and optical fibers 32d, 3d connected from the optical modules 32, 33 to the optical fiber selecting device 24.
As the optical connectors 32n and 33n at the 3f end, for example, a so-called MT type optical connector (Mecanically Transferable) defined by JIS C5981 or the like is used.

In this optical distribution board 20, the termination unit 21
The switchable optical fiber 29 is connected to the cable-side optical fiber 28 terminated by the optical module 31 to be connectable to the connector.
1 and 292, a connection mode in which the cable side optical fiber 28 and the switching optical fibers 291 and 292 are connected via the coupler module 32 to monitor the line, a cable side optical fiber 28 and the switching optical fiber 29
1, 292 are connected via the splitter module 33 to perform branch connection and line monitoring, and each connection form can be freely selected, and further, it is also possible to freely change to another connection form. .

For example, in FIG.
In the optical module 31, the switching optical fibers 291 and 292 connected to the cable-side optical fiber 28 are separated from the optical connector adapter 311 and connected to the optical connector adapter 321 of the coupler module 32. And the coupler module 32 are connected by the inter-unit optical fiber 293 (connection between the optical connector adapter 311 of the optical module 31 and the optical connector adapter 322 of the coupler module 32). The connection between the optical fibers 28, 291, and 292 is realized, and the optical lines of the optical fibers 28, 291, and 292 can be monitored. Switching optical fiber 29 detached from optical connector adapter 311 of optical module 31
1, 292 are connected to the optical connector adapter 331 of the splitter module 33, and the optical module 31 and the splitter module 33 are connected by a plurality of inter-unit optical fibers 293 (the optical connector adapter 311 of the optical module 31 and the splitter module 33). 33 to the optical connector adapter 332), the optical fibers 28, 291, 292 are connected via the splitter module 33, and the branch connection of the plurality of cable-side optical fibers 28 to the optical fibers 291, 292 is performed. And each optical fiber 2
8, 291, and 292 can be realized.

Conversely, an inter-unit optical fiber 293 connecting between the optical connector adapter 311 of the optical module 31 and the optical connector adapter 322 of the coupler module 32.
Is removed, and the switching optical fibers 291 and 292 detached from the optical connector adapter 321 of the coupler module 32 are connected to the optical connector adapter 311 of the optical module 31, so that a connection mode not involving the coupler module 32 is obtained. From the connection mode via the splitter module 33, the optical fibers 31, 28, 291, 2
Similarly, the change to the connection form in which the 92s are connected is made by removing the inter-unit optical fiber 293 and connecting the switching optical fibers 291 and 292 to the optical module 31. A connection form via the coupler module 32;
The change between the connection modes via the splitter module 33 can be easily performed by using the inter-unit optical fiber 293 and the switching connection of the switching optical fibers 291 and 292.

As shown in FIGS. 3A and 3B, in the optical component unit 61, the optical connector adapters 321 and 322 of the coupler module 32 and the splitter module 33
Are arranged toward the front side of the optical component unit 61, the optical connector adapters 321 and 32 of these optical modules 32 and 33 are arranged.
2, 331 and 332, the inter-unit optical fiber 2
93 and the switching optical fibers 291 and 292 can be switched and connected efficiently. Therefore, when the connection form via the coupler module 32 or the splitter module 33 is adopted,
In the same operation as the termination unit 21, the optical component unit 61
The switching connection can be performed with. In the optical component unit 61, the cord support 30d and the cord duct 21 are also provided.
Since the configuration including f is the same as that of the termination unit 21,
As with the termination unit 21, the operability of the switching optical fibers 291, 292, and 293 on the unit front side and the operability of the switching connection can be ensured. In the optical component unit 61, the optical modules 32 and 33 are interchangeable, and the optical modules 32 and 33 are changed according to the number of lines for performing line monitoring and branch connection.
By storing as many as required, track monitoring and branch connection can be realized. Therefore, the versatility is superior to a unit having a fixed number of cores, and can easily cope with a change in the number of lines for line monitoring and branch connection. Thus, in this optical distribution board 20, the use of the inter-unit optical fiber 293,
By selection of non-use and selection of the connection destination of the switching optical fibers 291 and 292, the presence / absence of line monitoring, the presence / absence of branch connection, and the like can be easily selected and changed.

According to the optical distribution board 20, the optical cable 2
The number of termination units 21 that can also perform termination, line monitoring, PDS line connection, and the like by using an optical connector from the exit of the cable-side optical fiber 28 from No. 6 is formed by laminating the target number. Can be adjusted by the number of stacked termination units 21. Therefore, it is possible to obtain a proper number of cores corresponding to the number of cores to be processed, and the cable fixing portion 27, the module storage portion 30, and the like become excessive with respect to the actual number of cores to be processed, resulting in waste. Such inconveniences are resolved, and the cost can be reduced. Since the size of the entire optical wiring board 20 is also in accordance with the actual number of processing cores, it is not necessary to secure an unnecessarily large installation space.

Even if the optical distribution board 20 has been assembled, the number of termination units 21 can be changed to change the number of cores corresponding to the actual number of processing cores. In addition, the configuration (cable fixing portion 27, module storage portion 30, etc.) for performing from the exit of the cable side optical fiber 28 from the optical cable 26 to the termination by the optical connector can be increased or decreased in the termination unit 21 unit. Can respond efficiently. In addition, even if the number of the termination units 21 is increased or decreased, the termination processing and the like of the cable-side optical fiber 28 can be performed without substantially affecting the optical fibers in the other termination units 21. it can. That is, even if work is performed in a specific termination unit 21, the optical fiber or the like in another termination unit 21 is hardly moved or vibration is applied. Of the optical line, instantaneous interruption of optical communication, and the like. In particular, the output of the cable side optical fiber 28 from the terminal of the optical cable 26 is
Since it is performed in one unit, compared to a structure in which all optical cables led into the optical distribution board are tapped at one place,
The local concentration of the exposed cable-side optical fiber 28 can be prevented, and the workability of wiring, taking out, and removing the cable-side optical fiber 28 can be improved. The number of optical component units 61 can also be increased or decreased in units, and the number of modules such as the module table 30a and the optical fiber selection device 24 can be collectively increased or decreased.

It should be noted that the present invention is not limited to the above embodiments, and various changes can be made. For example, the assembled form of the termination unit and the optical component unit is not limited to a simple lamination, and may be combined in a horizontal arrangement or the like, and can be freely changed. In the above-described embodiment, the configuration in which the optical module 31 can be stored, replaced, removed, and the like is illustrated by extracting the module storage unit 30 from the termination unit 21 by rotation about the hinge 35. The present invention is not limited to this, and it is also possible to adopt a configuration in which the module storage section can be linearly pulled out from the termination unit to the front side of the termination unit by sliding movement. Further, a configuration in which the module storage section is pulled out toward the rear side of the termination unit by rotation or sliding movement about the hinge can be adopted. Further, for the module storage portion that is not drawn out from the termination unit 21, for example, a configuration in which the optical module can be stored or removed from the front side or the rear side of the termination unit can be adopted. However, the module storage portion that can be pulled out from the termination unit is basically configured such that the mounted module base, the optical fiber selection device, and the like are integrally pulled out. Also, in the front maintenance type optical distribution board,
There is an advantage that there is no need to secure a working space on the rear side, but in order to take advantage of this, it is necessary to pull out the module storage unit from the front side of each termination unit. In addition, the draw-out direction of the module storage unit from each of the plurality of termination units is basically the same. However, depending on the installation location, the draw-out direction of the module storage unit that is advantageous for the work is determined by the termination unit. It may be appropriate to set each time.

Further, in the above-described embodiment, the configuration in which the cable side optical fiber 28 is connected to the switching optical fibers 291 and 292 so as to be connectable to the connector by using the optical connector adapter 311 of the optical module 31 has been exemplified. However, the present invention is not limited to this. Without using the optical module 31, for example, an optical connector adapter is arrayed and mounted on a terminal board or the like provided on the front side of the termination unit to constitute a connector array section. It is also possible to adopt a configuration in which the cable-side optical fiber drawn into the end unit is terminated so as to be connectable to the connector by the optical connector adapter of the connector arrangement portion.
As the splitter module, a configuration in which the optical splitter and the optical coupler are housed has been exemplified, but the configuration is not limited thereto.
For example, a configuration in which an optical coupler is not housed can be adopted.

[0048]

As described above, according to the optical distribution board of the present invention, from the exit of the cable side optical fiber from the optical cable to the termination of the cable side optical fiber to the connector connectable to the switching optical fiber. Since a plurality of termination units can be assembled, the number of termination units can be adjusted so that the corresponding number of cores can be made to correspond to the actual number of processing cores. In addition, waste due to installation of a necessary number of connector arrangement portions or the like is eliminated, and cost can be reduced. In addition, the size of the entire optical wiring board does not need to be unnecessarily increased, and the installation space is not wasted. Further, the number of cores of the optical distribution board once assembled can be easily changed by increasing or decreasing the number of termination units. In addition, the increase or decrease of optical cables can be handled only by the work within the corresponding termination unit that performs the increase or decrease work. There is no influence such as disconnection. Further, in the work in a specific termination unit, the number of cable side optical fibers, switching optical fibers, and the like to be handled can be reduced, so that there is an advantage that the work can be performed efficiently and quickly. Further, in this optical distribution board, the inter-unit optical fiber connected to the cable side optical fiber via the optical connector of the connector arrangement portion of the termination unit, and the switching optical fiber are connected to the separately provided optical component unit. By itself, the optical component of the optical component unit can be interposed between the cable side optical fiber and the switching optical fiber, the branching of the optical line by the optical component can be easily realized, and the inter-unit optical fiber An excellent effect of simply selecting whether or not to use a connection mode in which an optical component is interposed can be easily obtained only by changing the connection destination of the switching optical fiber, whether or not the connection is used.

According to the optical distribution board of the second aspect, by selectively using the coupler module and the splitter module,
In addition to terminating the cable-side optical fiber with a connector, you can easily select whether or not to monitor the line and whether or not to use a PDS line, and even after completing the wiring once by switching the optical module used. , Track monitoring,
It has an excellent effect that the presence or absence of the PDS line can be freely changed.

According to the third aspect of the present invention, the splitter module accommodated in the optical component unit includes an optical connector adapter to which the switching optical fiber is connected and an optical connector to which the inter-unit optical fiber is connected. The optical coupler that branches the monitoring optical fiber connected to the optical pulse tester from the optical line between the connector adapter is housed. In addition to the branch connection between the cable side optical fiber and the switching optical fiber, it is possible to realize line monitoring of the optical line related to the cable side optical fiber and the optical line related to the switching optical fiber. It works.

[Brief description of the drawings]

FIG. 1 is a view showing an optical distribution board according to an embodiment of the present invention, wherein (a) is a front view, (b) is a bottom view showing a cable introduction unit, and (c) is a perspective view showing a bending member. FIG.

2A and 2B are diagrams showing a termination unit provided in the optical distribution board of FIG. 1, wherein FIG. 2A is a plan view, FIG.
(C) is a side view.

3A and 3B are diagrams showing an optical component unit provided in the optical wiring board of FIG. 1, wherein FIG. 3A is a front view and FIG. 3B is a side view.

4A and 4B are diagrams showing a coupler module provided in the optical component unit of FIG. 3, wherein FIG. 4A is a left side view and FIG.
Is a front view, (c) is a right side view, (d) is AA of (a).
It is a line sectional arrow view.

5A and 5B are diagrams showing a splitter module provided in the optical component unit of FIG. 3, wherein FIG.
(B) is a front view, (c) is a right side view, and (d) is a sectional view taken along line BB of (a).

FIG. 6 is an optical wiring diagram of the optical wiring board of FIG. 1;

FIG. 7 is a front view showing a conventional optical distribution board.

[Explanation of symbols]

Reference Signs List 20: Optical distribution board, 21: Terminating unit, 21b: Connector arrangement part, 23c: Optical pulse tester, 26: Optical cable, 27: Cable fixing part, 28: Cable side optical fiber, 29: Switching optical fiber (optical cord) ), 291 switching optical fiber (device-side optical fiber), 292 switching optical fiber (jumper cord), 293 optical fiber between units, 29a optical connector (optical connector plug), 311
... optical connector (optical connector adapter), 32 ... optical module (coupler module), 321,322 ... optical connector adapter, 32a ... optical coupler, 32b ... optical line (optical fiber) between optical connector adapters, 32d ... monitoring light Fiber 33, optical module (splitter module), 331, 332 optical connector (optical connector adapter), 33a optical splitter, 33b, 33c optical line (optical fiber) between optical connector adapters, 33e optical coupler, 33f ... monitoring optical fiber, 50a ... switching optical fiber, 61 ... optical component unit.

Claims (3)

[Claims] 1. A switching optical fiber (29, 291) which is another optical fiber which is connected to a plurality of cable-side optical fibers (28) on an optical cable (26) side by an optical connector (29a) so as to be connectable. , 292, 50a) switchably connected to the optical distribution frame, comprising: a cable fixing portion (27) for fixing the optical cable;
A connector arrangement portion (21b) in which a plurality of optical connectors (311) for terminating the cable-side optical fiber drawn out from the optical cable terminal so as to be connectable to the switching optical fiber are connected. A plurality of units (21) are assembled, and the unit-to-unit optical fiber (29) is switchably connected to the cable-side optical fiber via the optical connector of the connector array.
An optical component unit (61) in which an optical component such as an optical coupler (32a) or an optical splitter (33a) is interposed between the two optical fibers by detachably connecting the switching optical fiber to the switching optical fiber. An optical distribution board (20) comprising at least one of the following. 2. The optical component unit can house a coupler module (32) that houses an optical coupler and a splitter module (33) that houses an optical splitter in an interchangeable manner. And an optical connector adapter (322) to which the inter-unit optical fiber is detachably connected, and an optical line (32b) for connecting the two optical connector adapters. ), A monitoring optical fiber (32d) branched through the optical coupler interposed therebetween and connected to an optical pulse tester (23c), and the splitter module comprises: An optical connector adapter (331) to which the switching optical fiber is detachably connected;
A plurality of optical connector adapters (332) to which the inter-unit optical fibers are detachably connected, wherein the optical splitter is interposed in an optical line (33b, 33c) connecting the two optical connector adapters; 2. The optical distribution board according to claim 1, wherein a plurality of optical lines on the other optical connector adapter side are branched and connected to an optical line on one optical connector adapter side. 3. An optical pulse tester is connected to the splitter module from an optical line between an optical connector adapter to which the switching optical fiber is connected and an optical connector adapter to which the inter-unit optical fiber is connected. Optical coupler (3) for branching the monitoring optical fiber (33f)
The optical distribution board according to claim 2, wherein 3e) is accommodated.