JP4118862B2 - Optical distribution board - Google Patents

Description

  The present invention relates to an optical wiring board, and more particularly, to an optical wiring board excellent in workability (maintenance) such as connection switching of optical fibers.

An optical distribution board installed in a facility center of an optical fiber network is terminated so that an optical fiber core wire extending from an external fiber optic cable terminal can be connected to a connector (hereinafter sometimes referred to as a connector termination). Optical cable cores on the outside optical fiber cable side and light beams on the floor cord cable side connected to the transmission device, etc., by cable termination units (hereinafter referred to as connection panels) in which a plurality of optical connectors (optical connector adapters, etc.) are installed. It has a structure that realizes connection with the road.
The connection panel includes an optical connector adapter array section in which a plurality of optical connector adapters that terminate the optical fiber core wire extended from the outer optical fiber cable terminal so that the connector can be connected, and the optical fiber core wire and the optical connector side. A connection point storage part for storing connection points with the optical fiber, and an external cable core wire storage part for storing the optical fiber core wires wired to the connection point storage part (core wire wiring rack, core wire duct, etc. Cord storage section (code wiring shelf, cord duct, etc.) that stores optical fiber cords that are extended from the end of the floor cord cable and are connected to the optical connector adapter of the optical connector adapter array section in a switchable manner In general, a structure having There are many different types of connection panels, but due to differences in strength between optical fiber cores on the external optical fiber cable side and optical fiber cords on the floor cord cable side, maintenance time, etc. It is desirable to have a structure in which the cord storage part is completely separated.
2. Description of the Related Art Optical distribution boards having a large number of storage cores (for example, having thousands of cores) are widely used in a structure in which the connection board (cable termination unit) is mounted in multiple stages. Conventionally, the front side of the optical wiring board is the cord work surface for connecting and switching the optical fiber cord on the floor cord cable side to the optical connector adapter of the optical connector adapter array section, and the back side is the optical fiber cable by the optical connector adapter. In the case of a double-sided work type (for example, Patent Document 1) that is an external cable work surface for performing an operation of terminating the optical fiber core on the side of the connector, the external cable core wire storage portion Generally, it is installed on the side, and in a single-sided maintenance type optical distribution board (for example, Patent Documents 2 and 3) in which the cord work surface is on the same side as the external cable work surface, the external cable core wire storage portion is provided. A structure installed at the top of the connection board is common.
JP 2001-124936 A JP 2003-215353 A JP 2001-004848 A

  By the way, it is important to take extra space for the optical fiber core wire on the side of the optical fiber cable in the optical distribution board, but the optical fiber core wire extending from the end of the optical fiber cable has been terminated. When an optical fiber cable with a connector (hereinafter referred to as an optical fiber cable with a connector) is used, the length of the optical fiber core wire is long. When the length of the optical fiber core wire is long, such as an optical fiber cable with a connector, the extra length is absorbed by taking a large turn using the space secured in the side of the connection board in the conventional optical distribution board, Wiring was widely performed so as to be drawn from the external cable core wire storage part at the top of the connection panel to the connection point storage part. However, in such surplus length processing, a surplus length storage space must be secured on the side of the connection board, and as a result, high density has been hindered.

  In view of the above problems, the present invention secures an extra length processing space of an optical fiber that is extended from an optical fiber cable terminal and is terminated so that a connector can be connected at a termination unit, at a side portion of the termination unit. The object is to provide an optical wiring board that can be avoided and, as a result, can be increased in density.

In order to solve the above problems, the present invention provides the following configuration.
The invention according to claim 1 is a case in which an optical connector for terminating a cable-side optical fiber, which is an optical fiber extended from an optical fiber cable terminal, with another optical fiber so that the connector can be connected is attached. A termination unit that accommodates a plurality of optical modules side by side, the termination unit comprising a module storage unit that stores a plurality of optical modules side by side so that the optical module can be pulled out, and an operation in which the optical module of the module storage unit is pulled out On the surface side, the other connector is connected from the work surface side of the module housing portion to the optical connector provided at the lower portion of the module housing portion and attached to the end portion on the work surface side of the optical module. A wiring duct to which an optical fiber is routed and provided on the work surface side of the module housing portion below the wiring duct. Serial to provide an optical wiring board characterized by having a cable-side optical fiber wiring shelf can hold extra length of the cable-side optical fibers to be routed to the optical module from the work surface side of the module housing portion.
According to a second aspect of the present invention, in the optical wiring board according to the first aspect, the wiring duct is supported so as to be displaceable with respect to the module housing portion by a movable support mechanism, and the cable-side optical fiber is displaced by the displacement of the wiring duct. The wiring shelf can be opened and closed.
According to a third aspect of the present invention, in the optical wiring board according to the second aspect, the movable support mechanism is a rotation support mechanism that rotatably supports the wiring duct.
According to a fourth aspect of the present invention, in the optical wiring board according to the third aspect, the wiring duct is divided into a plurality of duct divided bodies in the extending direction along the lateral direction of the module housing portion, The divided bodies are individually supported by the rotation support mechanism so as to be individually rotatable up and down.
According to a fifth aspect of the present invention, in the optical distribution board according to the third or fourth aspect, the optical circuit board has a holding mechanism for holding the wiring duct rotated upward from the cable-side optical fiber wiring shelf in a predetermined position. It is characterized by.
According to a sixth aspect of the present invention, in the optical distribution board according to any one of the first to fifth aspects, the termination unit is provided with a holding base for holding the distal end portions of the cable-side optical fibers side by side and in a plurality of arrangement states. It is characterized by being.
A seventh aspect of the present invention is the optical distribution board according to any one of the first to sixth aspects, wherein an extra-length storage tray is stored in the cable side optical fiber wiring shelf.
The invention according to claim 8 is the optical wiring board according to any one of claims 1 to 7, wherein the cable side optical fiber is provided at an end portion on the work surface side of the optical module by an optical connector. An optical fiber with a connector which is terminated so that the connector can be connected to the optical connector for connection.

According to the optical wiring board of the present invention, the following excellent effects can be obtained.
(1) Since the extra length of the optical fiber on the cable side can be secured in preparation for the installation of the optical module in the module housing portion, work such as the addition of the optical module can be performed very easily.
(2) Since there is no need to secure a separate space for storing the extra length of the cable-side optical fiber in the optical distribution board (or to reduce the space reserved separately), the design flexibility in the optical distribution board is improved. And high density.

Hereinafter, an optical wiring board embodying the present invention will be described with reference to the drawings.
1A and 1B are views showing an optical wiring board 1 according to the present invention, wherein FIG. 1A is a front view, FIG. 2B is a side view, FIG. 2 is a view taken along line AA in FIG. 1A is a cross-sectional view taken along the line B-B of FIG. 1A, FIG. 4 is a diagram illustrating the termination unit 5, (a) is a plan view, (b) is a front view, FIG. 6 is a view showing a support structure of the termination optical fiber duct in the termination unit of FIG. 4, and FIG. 7 is a perspective view showing an example of the retention portion 581 of the retention base 58 of the termination unit 5. 8 is a view showing another embodiment of the movable support mechanism of the termination unit 5, FIG. 9 is a plan view showing an example in which an extra length storage tray 543 is provided on the cable side optical fiber wiring shelf 54 of the termination unit 5, and FIG. FIG. 11 is a perspective view showing the alignment element 33a, FIG. 11 is a perspective view taken along the line CC of FIG. 10, and FIG.
As shown in FIG. 1A, the optical wiring board 1 includes a termination rack 2 and a wiring rack 3 installed side by side next to the termination rack 2. The optical wiring board 1 described here is provided in an equipment center installed in an optical communication network. In the figure, reference numeral 8 denotes an installation floor provided in the equipment center, and the optical wiring board 1 is installed on the installation floor 8.

The termination rack 2 includes a frame-shaped frame 21 (hereinafter referred to as a rack body) and a connection panel unit 22 installed in the rack body 21. The termination rack 2 is connected to the end of the optical fiber cable 6 and the optical fiber 61 exposed to the end of the optical fiber cable 6 (hereinafter also referred to as a cable-side optical fiber). The optical connector 42 provided on the optical connector 42 serves to terminate the optical fiber (terminated optical fiber 71, which will be described later) drawn from the wiring rack 3 so that the connector can be connected.
Front side of the connection board unit 22 (front side of the optical wiring board 1 (FIG. 1 (a) front side of paper, left side of FIG. 3)) and rear side (back side of the optical wiring board 1 (FIG. 1 (a) paper side). A plurality of optical connectors 42 (sometimes referred to as optical connector adapters) for terminating the cable-side optical fiber 61 so that they can be connected to a connector are installed on the rear side, the right side in FIG. In the illustrated optical distribution board 1, the optical connector 42 of the connection board unit 22 is attached to the side of the optical module 4 housed in the connection board unit 22. The configurations of the connection panel unit 22 and the optical module 4 will be described in detail later.

Here, the term “terminated so that the connector can be connected” means the act of attaching the optical connector to the tip of the optical fiber, and the receiving side optical connector (both sides of the optical connector adapter and optical connector receptacle) after the optical connector is attached. An optical connector housing for connecting the optical connector plugs to each other), or an act of inserting an optical fiber to which the optical connector is already attached into the receiving optical connector. To do. An optical fiber terminated so as to be connectable to a connector can be connected to another optical connector by connecting the optical connector at the tip of the optical fiber (inserting an optical connector plug into the receiving optical connector), and another optical fiber or the like. Optical connection with the configured optical line is realized. Here, it is assumed that the connection of the optical connector plug to the receiving side optical connector is detachable.
Explaining the cable-side optical fiber 61 described above, the optical connector 42 of the connection panel unit 22 can be connected by inserting an optical connector 72 (optical connector plug) attached to the end of the termination optical fiber 71. A receiving side optical connector (optical connector) such as a connector adapter or an optical connector receptacle. By directly attaching the receiving side optical connector to the tip of the cable side optical fiber 61, or by optically connecting the cable side optical fiber 61 to the other end side of the optical fiber to which the receiving optical connector is attached to one end, By inserting and connecting the optical connector 72 (optical connector plug) attached to the end of the terminated optical fiber 71 to the optical connector 42, optical connection between the cable side optical fiber 61 and the terminated optical fiber 71 by the optical connector is realized. The

As shown in FIG. 3 and the like, the connection panel unit 22 includes a front-side connection board 23 on the front side and a back-side connection board 24 on the back side.
The front-side connection board 23 and the back-side connection board 24 are each composed of a plurality of termination units 5 attached to the rack body 21 in upper and lower stages. The termination unit 5 accommodates a plurality of optical modules 4 formed in a thin outer appearance in a vertically arranged and horizontally arranged state. The configuration of the termination unit 5 will be described in detail later. In the illustrated optical distribution board 1, both the front-side connection board 23 and the rear-side connection board 24 are constituted by the termination units 5 mounted on the rack body 21 in six stages. The number of termination units 5 constituting the back side connection board 24 is not limited to this and can be changed.
However, the front side connection board 23 and the back side connection board 24 are provided above the cable storage space 25 secured in the lower part of the termination rack 2.

As shown in FIGS. 4A, 4B and 5, the termination unit 5 has a frame-shaped module housing portion 51, and the optical modules 4 are placed vertically in the module housing portion 51. A plurality are stored in the arrangement state.
As shown in FIG. 5, the optical module 4 has optical connectors 42 and 43 (here, a part of a side portion) at one end portion (front end portion and side portion) of a plastic flat case-shaped module main body 41 formed in a thin plate shape. An optical connector adapter or an optical connector receptacle is used depending on the shape, but an optical connector receptacle may also be referred to as an optical connector adapter).
In the front-side connection board 23, the optical module 4 includes the termination unit 5 in an orientation in which the optical connector adapters 42 and 43 are on the front side of the optical wiring board 1 (the front side of FIG. 1A and the left side of FIG. 3). Are housed in the module housing portion 51. On the other hand, in the back side connection board 24, the optical module 4 is terminated in such a direction that the optical connector adapters 42 and 43 are on the back side of the optical wiring board 1 (FIG. 1 (a) rear side of paper, right side of FIG. 3). It is stored in the module storage part 51 of the unit 5.

  The front-side connection board 23 inserts the optical module 4 into the termination unit 5 (specifically, module housing 51) from the front side of the optical wiring board 1, and from the termination unit 5 to the front side of the optical wiring board 1. The optical module 4 can be pulled out. The back side connection board 24 inserts the optical module 4 into the termination unit 5 (specifically, module housing 51) from the back side of the optical wiring board 1, and from the termination unit 5 to the back side of the optical wiring board 1. The optical module 4 can be pulled out. Hereinafter, the front side (front side of the optical wiring board 1) in which the optical module 4 is inserted into and removed from the termination unit 5 of the front side connection board 23 is also referred to as the work surface side (for the front side connection board 23). Further, hereinafter, the back side (the back side of the optical wiring board 1) where the optical module 4 is inserted into and pulled out from the termination unit 5 of the back side connection board 24 is referred to as the work surface side (for the back side connection board 24). Also say. In addition, hereinafter, regardless of whether the connection board on which the termination unit 5 is mounted is either the front side connection board 23 or the rear side connection board 24, the side on which the optical module 4 is drawn from the termination unit 5 is terminated. The operation will be described as the work surface side of the unit 5.

Insertion of the optical module 4 from the work surface side into the termination unit 5 of the front side connection panel 23 and the rear side connection panel 24 is performed as shown in FIG. When the rear end of the optical module 4 opposite to the front end of the optical module 4 abuts against the stopper member 52 provided at the deepest part in the depth direction when viewed from the working surface side, the further pushing is restricted and the insertion is performed. It becomes a limit. The optical module 4 can be inserted into and pulled out from the termination unit 5 only from the work surface side.
The stopper member 52 only needs to fulfill the function of determining the insertion limit of the optical module 4 with respect to the termination unit 5 when the optical module 4 is brought into contact therewith. There is no need to touch.

As shown in FIGS. 3 and 5, the termination unit 5 of the front connection board 23 and the termination unit 5 of the rear connection board 24 are in the depth direction of the termination rack 2 (front-rear direction; left-right direction in FIG. 3). Are arranged in close proximity so as to face each other at the center.
As the connection panel unit 22 according to the present invention, for example, a space used for insertion of an optical fiber cable or the like between the termination unit 5 of the front side connection panel 23 and the termination unit 5 of the rear side connection panel 24. It is also possible to adopt a configuration that ensures the above. However, if the termination unit 5 of the front side connection board 23 and the termination unit 5 of the rear side connection board 24 are arranged close to each other, the depth dimension of the termination rack 2 of the connection board unit 22 is determined. There is an advantage that can be made as small as possible.

  An optical fiber cable 6 is drawn into the termination rack 2. The optical fiber cable 6 is drawn into the cable storage space 25 of the termination rack 2 and is fixed by a cable fixing tool 25 a provided in the cable storage space 25. However, the drawing position of the optical fiber cable 6 into the termination rack 2 is not necessarily in the cable storage space 25. For example, a fixed shelf with a cable fixture 25a attached to the termination rack 2 is provided, The structure etc. which pull in to this fixed shelf may be sufficient.

An optical fiber 61 exposed to the end of the optical fiber cable 6 (hereinafter also referred to as a cable-side optical fiber) is drawn into the front-side connection board 23 or the rear-side connection board 24, and the optical connector adapter 42 of the optical module 4 The optical fiber 71 (described later) drawn from the wiring rack 3 to the termination rack 2 is terminated so that the connector can be connected to an optical connector 72 (see FIG. 5).
As shown in FIG. 1A, FIG. 2 and the like, the cable side optical fiber 61 is connected from the cable housing space 25 to the termination unit 5 at the center portion of the optical distribution board 1 and the connection board unit 22 and the alignment board 33A. , 33B and the excess length storage space 34 (described later) secured from the opposite side (that is, the left side in FIG. 1A). In the illustrated example, the cable-side optical fiber 61 is exemplified by an optical fiber with a connector whose tip is terminated by an optical connector 62 (optical connector plug) so as to be connected to the optical connector adapter 43 of the optical module 4. The optical connection between the cable-side optical fiber 61 and the optical fiber 44 in the optical module 4 is realized simply by pushing. One end of the optical fiber 44 in the optical module 4 is connected to the optical connector adapter 42, and the other end is connected to the optical connector adapter 43, and the optical fiber adapter 44 is connected to the cable-side optical fiber 61 by the optical connector adapter 43. When the cable is connected, the cable side optical fiber 61 is terminated by the optical connector adapter 42 via the optical fiber 44 so that the connector can be connected to the termination optical fiber 71.

  When the example shown in FIG. 5 is specifically described, a multi-core optical fiber ribbon is adopted as the cable-side optical fiber 61, and the optical connector 62 that terminates the end of the cable-side optical fiber 61 so that the connector can be connected. An optical connector ferrule (hereinafter referred to as an MT type optical connector) used in an MT type optical connector (MT: Mechanically Transferable; F12 type optical connector established in JIS C 5981) is employed. The optical fiber 44 accommodated in the optical module 4 is a multi-core optical fiber whose tip is terminated by an optical connector 44a which is a multi-fiber MT type optical connector having the same number of cores as the optical connector 62. Portion 44b, a plurality of single-core optical fiber portions 44d that are single-core branched from a branch portion 44c that is the end of the multi-core optical fiber portion 44b opposite to the optical connector 44a, and each single-core optical fiber This is an optical fiber for branch connection having an optical connector 44e (single-core optical connector plug) attached to the tip of the portion 44d.

  The optical connector 44e is connected to the optical connector adapter 42 from the inside of the optical module 4. When the optical connector 72 at the tip of the termination optical fiber 71 (here, single-core optical fiber) is inserted and connected to the optical connector adapter 42 of the optical module 4 in the termination unit 5 from the work surface side, the inside of the optical connector adapter 42 The single optical fiber portion 44d of the optical fiber 44 and the terminated optical fiber 71 are optically connected by connecting the optical connectors 44e and 72 in FIG. Here, the optical connector adapter 42 is a MU type optical connector (MU: Miniature-unit Coupling optical fiber connector; F14 type optical connector established in JIS C 5983), and connects a plurality of pairs of optical connectors 44e and 72 to each other. realizable. The optical connector 44e at the distal end of the single-core optical fiber portion 44d of the optical fiber 44 and the optical connector 72 at the distal end of the terminated optical fiber 71 are optical connector plugs that can be connected to the optical connector adapter 42.

  On the other hand, the optical connector 44a at the tip of the multi-fiber optical fiber portion 44b of the optical fiber 44 is incorporated in the optical connector adapter 43, and the optical connector 62 at the tip of the cable side optical fiber 61 is pushed into the optical connector adapter 43 from the work surface side. As a result, the optical connector 62 is connected within the optical connector adapter 43. When the optical connectors 44 a and 43 are connected to each other, the cable side optical fiber 61 is optically connected to the multi-core optical fiber portion 44 b of the optical fiber 44, whereby the cable side optical fiber 61 is single-core via the optical fiber 44. The optical fiber is branched and terminated by the optical connector adapter 42 so that the connector can be connected to the terminated optical fiber 71.

  The optical connector 62 at the tip of the cable-side optical fiber 61 can be connected to the optical connector 44a of the optical fiber 44 simply by being pushed into the optical connector adapter 43 from the work surface side. Further, after the optical connector 62 at the tip of the cable-side optical fiber 61 is pushed into the optical connector adapter 43, the leaf spring-like clip 43a provided on the optical connector adapter 43 is rotated and engaged with the optical connector 62. Thus, it is possible to maintain the push-in state of the optical connector 62 into the optical connector adapter 43 and to apply the abutting force between the optical connectors 44a and 62. Further, the engagement between the clip 43a and the optical connector 62 can be easily released by the rotation operation of the clip 43a (rotation operation in the direction opposite to the direction of engagement with the optical connector 62). The extraction of the optical connector 62 from the connector adapter 43 and the release of the connection with the optical connector 44a can be easily realized. The optical connector adapter 43 functions as an optical connector for cable connection to which the optical fiber 61 exposed at the end of the optical fiber cable 6 is connected.

Note that the number of optical fibers 44, 61, 71, the types of optical connector adapters 42, 43, and the like are not limited to those described above, and can be changed as appropriate. The optical connectors 42 and 43 provided in the optical module 4 may be any optical connector adapter as long as it has a function of connecting the termination optical fiber 71 or the cable-side optical fiber 61 to the optical fiber in the optical module 4. For example, an optical connector receptacle or the like can also be used. Needless to say, as the optical connectors 44a, 44e, 62, and 72 that are optical connector plugs, those that can be connected in accordance with the type of the optical connector 42 or the optical connector 43 are adopted.
As the optical fiber cable 6, for example, a cable (so-called vertical cable or the like) that connects optical distribution boards is used.

As shown in FIGS. 1 (a), 1 (b), etc., an optical fiber cable 7 such as a floor cord cable connected to a transmission device (not shown) installed in the place is connected to the wiring rack 3, for example. The cable storage space 31 secured at the lower part of the wiring rack 3 is pulled in and fixed by a cable fixture 32 provided in the cable storage space 31. The optical fiber 71 exposed at the end of the optical fiber cable 7 is a terminated optical fiber whose end is terminated so as to be connectable by an optical connector 72 (optical connector plug).
A large number of termination optical fibers 71 drawn from the wiring rack 3 to the termination rack 2 are led through the alignment boards 33A and 33B installed in the wiring rack 3 to be aligned. The wiring rack 3 is provided with two alignment boards 33A and 33B that are shifted in the depth direction of the wiring rack 3 (the vertical direction in FIG. 2, the horizontal direction in FIG. 3, in other words, the front-back direction). The alignment plates 33A and 33B have a structure in which thin-plate-like alignment elements 33a (see FIG. 10) through which the termination optical fibers 71 are passed are stacked in multiple upper and lower stages, and multiple termination optical fibers 71 are stacked in multiple upper and lower stages. Serves to support the alignment. These alignment boards 33A and 33B are provided in the range from the upper end of the termination frame 3 to the center part. The termination optical fiber 71 is connected to the target termination unit 5 of the connection panel unit 22 via the extra length storage space 34 secured between the connection panel unit 22 of the termination rack 2 and the alignment panels 33A and 33B. It is supposed to be drawn.

  In the configuration in which a plurality of alignment boards 33A and 33B are installed on the wiring rack 3, the vertical dimension of the alignment board can be reduced as compared with the case where there is only one alignment board (alignment elements per alignment board). This is advantageous in that the number of stacked layers 33a can be reduced) and the position of the alignment board is set as high as possible on the wiring rack 3 (the position of the lowermost alignment element 33a is set as high as possible). In addition, if the termination optical fibers 71 are aligned by the plurality of alignment boards 33A and 33B, alignment wiring is easy even when the termination optical fibers 71 are introduced in a large number, and the termination optical fibers 71 When transferring, removing, etc., there is an advantage that it is easy to find the termination optical fiber 71 to be worked, and workability can be improved.

The alignment plates 33A and 33B are provided on the upper side of the cable storage space 31, and the position (height) of the introduction portion of the termination optical fiber 71 led to the lowermost stage of the alignment plates 33A and 33B is as follows. It is the same as the lower end of the connection board unit 22 provided over the range from the upper part of the frame main body 21 of the termination frame 2 to the center part, or is located above it.
In the illustrated optical distribution board 1, the side of the connection board unit 22 of the termination rack 2 is disposed close to the wiring rack 3, so that the extra length storage space 34 is entirely located within the wiring rack 3. For example, when the connection panel unit 22 is in a position where it is pulled into the termination rack 2 from the side of the termination rack 2 on the side of the wiring rack 3, the extra-length storage space 34 is connected to the termination rack 2 and the wiring rack 3. It is also possible to adopt a configuration that exists across the frame or a configuration that exists only on the termination rack 3 side.

  Further, as shown in FIGS. 1B and 2, the wiring rack 3 includes a termination optical fiber 71 (hereinafter, referred to as an optical connector adapter 42) that is not connected to the optical connector adapter 42 of the optical module 4. A holding element 35 is provided for holding the terminal of the holding optical fiber 711 (which may be referred to as a holding optical fiber 711). As shown in FIG. 12, the holding element 35 is a case-like member that detachably accommodates the optical connector 72 at the end of the termination optical fiber 71. As shown in FIGS. A plurality of inner surfaces of the opening / closing door 36 on the front side of the wiring rack 3 (side facing the alignment board 33A) and a plurality of inner surfaces of the opening / closing door 37 on the rear side (side facing the alignment board 33B) are provided. ing. These holding elements 35 can be exposed by opening the door to the outside of the wiring rack 3 (see the phantom line in FIG. 2), and the optical connector 72 at the end of the termination optical fiber 71 can be stored and taken out.

FIG. 10 shows the alignment element 33 a mounted on the alignment board 33 A on the front side of the wiring rack 3.
As shown in FIGS. 10 and 11, the alignment element 33 a is a flat cylindrical body formed in an external thin plate shape. The alignment boards 33A and 33B have a structure in which a plurality of alignment elements 33a are vertically stacked.
The alignment element 33a includes a plate-like base portion 33b, a lid plate 33c detachably mounted on the base portion 33b, and a detachable wall 335 (described later). The base portion 33b and the lid plate An optical fiber storage space 33d for storing the termination optical fiber 71 is secured between the optical fiber storage space 33c and the terminal 33c. The optical fiber storage space 33d passes through the alignment element 33a and has openings on both sides of the alignment element 33a. Further, the optical fiber storage space 33d indicates the entire internal space of the alignment element 33a.

A terminating optical fiber 71 (terminated optical fiber denoted by reference numeral 712 in FIG. 10) that is routed through the optical fiber accommodating space 33d can be accommodated inside the alignment element 33a. In this case, a part of the termination optical fiber 71 in the longitudinal direction is accommodated in the optical fiber accommodation space 33d, and the termination optical fiber 71 is extended from the openings on both sides of the optical fiber accommodation space 33d. . However, one opening of the optical fiber storage space 33d is fixed by a partition wall 334 fixed to one or both of the base 33b and the lid 33c (in the illustrated example, fixed to both the base 33b and the lid 33c). The terminated optical fiber 71, which is divided into the lead-in gate portion 333 and the second gate portion 332 and is routed through the optical fiber housing space 33d as described above, is connected to the lead-in gate portion 333. And the first gate portion 331 which is the other opening of the optical fiber storage space 33d.
On the other hand, the reserved optical fiber 711 passes through the lead-in gate portion 333 and the second gate portion 332, and is bent and wired in a U shape in the optical fiber storage space 33d.

As shown in FIG. 2, the alignment element 33 a is arranged in the wiring rack 3 in such a direction that the first gate portion 331 is on the extra length storage space 34 side, and the second gate portion 332 and the pull-in gate portion 333 are on the opposite side. The
Further, as shown in FIG. 11, the protruding wall 33e standing on the side portion of the base portion 33b functions as one of the side wall portions on both sides of the optical fiber storage space 33d of the flat alignment element 33a. The detachable wall 335 functions as the other of the side wall portions on both sides of the optical fiber storage space 33d.
The alignment element 33a of the front-side alignment board 33A has the detachable wall 335 on the front side of the wiring rack 2, and the alignment element 33a of the front-side alignment board 33B has the detachable wall 335 on the rear side of the wiring rack 2. Provided.
Further, in the alignment element 33a of the alignment board 33A on the front side, the lead-in gate portion 333 is located at a position shifted to the back side in the depth direction of the wiring rack 3 from the second gate portion 332, and the alignment plate 33B on the back side is aligned. In the element 33a, the lead-in gate portion 333 is located at a position shifted to the front side in the depth direction of the wiring rack 3 from the second gate portion 332.

  Terminating optical fiber 71 drawn into the connection panel unit 22 from the alignment boards 33A and 33B and connected to the optical connector adapter 42 of the optical module 4 (terminated optical fiber of the working line; hereinafter also referred to as working optical fiber 712). Is passed through the first gate part 331 and the lead-in gate part 333 through the alignment element 33a. The distal end side (optical connector 72 side) of the working optical fiber 712 from the portion accommodated in the alignment element 33a extends from the first gate portion 331 of the alignment element 33a, and the proximal end side (optical fiber cable 7 side). ) Extends from the pull-in gate portion 333. The holding optical fiber 711 is led to the alignment element 33a by the curved wiring in the alignment element 33a so as to pass through the second gate portion 332 and the drawing gate portion 333. On the other hand, in the reserved optical fiber 711 that is not connected, the base end side (optical fiber cable 7 side) is extended from the portion accommodated in the alignment element 33a and extended from the gate portion 333, which is the same as the working optical fiber 712. However, the distal end side (optical connector 72 side) extends from the second gate portion 332 of the alignment element 33 a and is wired to the holding element 35 by being routed in the wiring rack 3.

  The holding optical fiber 711 extended from the front-side alignment board 33A is wired to the holding element 35 provided on the front side of the alignment board 33A in the depth direction of the wiring rack 3, and extends from the rear-side alignment board 33B. The reserved optical fiber 711 thus taken out is routed to the holding element 35 provided on the back side of the alignment board 33B in the depth direction of the wiring rack 3, and the front side is obtained by distinguishing the wiring route. Congestion between the holding optical fiber 711 extended from the alignment plate 33A and the holding optical fiber 711 extended from the rear alignment plate 33B can be avoided. For this reason, even when the number of the reserved optical fibers 711 is large, there is an advantage that the reserved optical fiber 711 to be changed to the working optical fiber 712 can be easily found and taken out, and the wiring route can be easily changed.

  That is, the termination optical fiber 71 corresponds to the wiring route drawn into the connection board unit 22 from the arranging boards 33A and 33B and the wiring route drawn into the holding element 35 from the arranging boards 33A and 33B, respectively. One of the first and second gate portions 331 and 332 of 33a is selected, and the leading end side (optical connector 72 side) is extended from the selected gate portion so as to be wired through the alignment element 33a. . As a result, the working optical fiber 712 and the holding optical fiber 711 are clearly divided and wired into separate wiring routes, and congestion between the working optical fiber 712 and the holding optical fiber 711 can be reliably prevented.

The detachable wall 335 of the alignment element 33a is detachably provided on an element body 336 having a U-shaped cross section constituted by the base portion 33b and the lid body 33c. The opening 33f of the optical fiber housing space 33d in the side portion of the portion 33b opposite to the protruding wall 33e (hereinafter also referred to as a working side portion) is opened and closed. The opening 33f of the optical fiber storage space 33d extends over the entire length of the working side portion of the element main body 336 and communicates with the first gate portion 331 and the second gate portion 332.
In a state where the detachable wall 335 is attached to the working side portion of the element body 336, the movement of the termination optical fiber 71 between the first gate portion 331 and the second gate portion 332 is restricted by the detachable wall 335. As shown by the phantom line in FIG. 10, when the detachable wall 335 is detached from the element main body 336, the entire opening 33f is opened, so that the formation between the first gate portion 331 and the second gate portion 332 is performed. The end optical fiber 71 can be freely moved.
In a state where the detachable wall 335 is detached from the element main body 336, for example, the working optical fiber 712 is moved from the first gate portion 331 to the second gate portion 332 to become the holding optical fiber 711, or conversely, the holding optical fiber 711. Is switched from the second gate portion 332 to the first gate portion 331 and used as the working optical fiber 711, and the switching operation can be easily performed.
Further, an optical fiber confirmation window 33g formed in a shape cut from the work side portion side is provided in the base portion 33b and the cover plate 33c in the vicinity of the first gate portion 331 of the element body 336. With this optical fiber confirmation window 33g, the terminated optical fiber 712 passed through the first gate portion 331 can be easily visually confirmed.

  In the illustrated alignment element 33a, the detachable wall 335 is slidable along the work side while being guided by a guide groove 336a (see FIG. 11) provided on the work side of the element body 336. By pulling out from the second gate portion 332, it can be detached from the element main body 336, and conversely, it is slid along the working side portion from the second gate portion 332 and engaged with the guide groove 336a so as to work. It can be attached to the part. However, the configuration for detachably attaching the detachable wall 335 to the element main body 336 of the alignment element 33a is not limited to the configuration in the illustrated example, and, for example, can freely rotate to the element main body 336 via a hinge. Attached one or a structure that is removably fitted or engaged by being pushed into the side of the element body 336 (a structure that can be removed by pulling strongly or operating a lever for releasing engagement) ) Etc. can be adopted.

  As shown in FIG. 5, the termination unit 5 includes a module storage portion 51 and a work surface side from the module storage portion 51 (left side in FIG. 5). The termination optical fiber duct 53 (wiring duct) projecting on the work surface side but the rear surface side of the termination unit 5 of the back side connection panel 24 is the work surface side) and the module housing A cable-side optical fiber wiring shelf 54 is provided so as to protrude from the bottom of the portion 51 to the work surface side of the termination unit 5. The termination optical fiber duct 53 is provided on a portion (projecting portion 54a) of the cable side optical fiber wiring shelf 54 that protrudes toward the work surface side of the termination unit 5 from the module housing portion 51. Yes.

  The termination optical fiber duct 53 extends to the left and right of the termination frame 2 along the extending direction of the termination unit 5 that extends along the horizontal direction of the termination frame 2 (left and right in FIG. 1A). Has been. The terminated optical fiber duct 53 is wired with the terminated optical fiber 71 drawn from the wiring rack 3 to the termination rack 2 and connected to the optical connector adapter 42 of the optical module 4. As shown in FIGS. 4A and 5, in the termination optical fiber 71 connected to the optical connector adapter 42 of the optical module 4, the termination light is provided from the optical module 4 to the work surface side of the termination unit 5. The portion extending to the fiber duct 53 is maintained in a gently curved state by an R guide 56 and a clip 57 projecting from the terminated optical fiber duct 53. The clip 57 detachably holds the terminated optical fiber 71 between a pair of resin wire members 57a, and can collectively hold a plurality of terminated optical fibers 71 in units of the optical module 4.

The cable side optical fiber wiring shelf 54 is extended along the termination unit 5 to the left and right in parallel with the termination optical fiber duct 53. In this cable side optical fiber wiring shelf 54, the cable side optical fiber drawn into the termination unit 5 from the end of the optical fiber cable 6 introduced into the termination rack 2 and connected to the optical connector adapter 43 of the optical module 4. 61 is wired. The cable side optical fiber 61 is drawn from the surplus storage space 34 to the cable side optical fiber wiring shelf 54 of the target termination unit 5 and wired to the target optical module 4.
The termination optical fiber duct 53 and the cable-side optical fiber wiring shelf 54 are both formed in a bowl shape, so that the wired optical fibers 61 and 71 are not easily dropped, and the cable-side optical fiber The inconvenience that 61 and the termination optical fiber 71 are congested can also be reliably prevented.

  As shown in FIG. 5, in the work space 5S secured between the termination optical fiber duct 53 and the module housing portion 51, the holding attached to the overhanging portion 54a of the cable side optical fiber wiring shelf 54 is held. A table 58 is arranged. On the holding stand 58, a holding portion 581 for holding and holding the tip portion of the cable-side optical fiber 61 drawn into the cable-side optical fiber wiring shelf 54 so as to be removable is provided. The holding table 58 can hold a plurality of cable-side optical fibers 61 in a side-by-side arrangement along the extending direction of the cable-side optical fiber wiring shelf 54. In the holding table 58, the cable-side optical fibers 61 are arranged side by side in the module storage unit 51 and aligned with the optical module 4 to be stored, and are arranged side by side and are held in the holding unit 581. (For example, refer to FIG. 7), and the distal end portion of the cable-side optical fiber 61 is held by the holding portion 581, so that the optical module 4 connected to the cable-side optical fiber 61 is stored in the module storage portion 51. Reserved near position. Thus, if the configuration is such that a plurality of cable-side optical fibers 61 are arranged side by side and held, the line identification of the cable-side optical fibers 61 is easy, and connection with the optical module 4 and termination light are possible. The line contrast at the time of connection with the optical line on the fiber 71 side becomes clear, and the connection workability can be improved.

FIG. 7 shows an example of the holding unit 581. The retaining portion 581 illustrated in FIG. 7 is formed by an elastically deformable resin sheet attached on the retaining table 58, and a cable is formed by a pressing piece 582 formed by partially cutting the resin sheet. The side optical fiber 61 is configured to be held by being pressed onto the holding table 581. If the holding piece 582 is elastically deformed, the cable-side optical fiber 61 pressed by the holding piece 582 can be taken out from the holding table 58, whereby the cable-side optical fiber 61 can be pushed into the optical connector adapter 43 and Connection work can be performed.
In addition, the holding unit 581 is not limited to the structure illustrated in FIG. 7, and may be a connector holder that detachably holds the optical connector 62 at the tip of the cable-side optical fiber 61, for example.

As shown in FIG. 4, the termination optical fiber duct 53 is divided into a plurality of (here, three) duct division bodies 531 in the extending direction of the termination optical fiber duct 53. The plurality of duct division bodies 531 are arranged in a line in the extending direction of the termination optical fiber duct 53. As shown in FIG. 6, each duct division body 531 is installed so as to be placed on a duct support base 541 provided on the cable-side optical fiber wiring shelf 54. The duct support base 541 supports the duct divided body 531 so that a slight gap is ensured between the cable side optical fiber wiring shelf 54. This gap can be used as a storage space for the cable-side optical fiber 61 wired on the cable-side optical fiber wiring shelf 54.
Further, as shown in FIG. 6, each of the duct division bodies 531 can be attached to and detached from the duct support base 541. When the duct divided body 531 is removed from the duct support base 541, the cable-side optical fiber wiring shelf 54 can be opened, so that the cable-side optical fiber 61 is pulled into the cable-side optical fiber wiring shelf 54, replaced, removed, etc. Can be performed efficiently.

In this optical wiring board 1, for example, the cable-side optical fibers 61 corresponding to the number of optical modules 4 stored in the module storage unit 51 of the termination unit 5 are stored before the optical module 4 is stored in the module storage unit 51. The leading end of the cable-side optical fiber 61 is taken out from the holding base 58 when the optical module 4 is stored in the module storage section 51 by drawing it into the termination unit 5 in advance and holding the front end section in the storage base 58. Thus, it is possible to insert and connect the optical connector 62 to the optical connector adapter 43 of the optical module 4. In this case, for example, in correspondence with the addition of the optical module 4 to the module housing portion 51, the required number of cable side optical fibers 61 are taken out from the holding stand 58 and connected to the optical connector adapter 43 of the optical module 4. It ’s fine.
When the optical connector 62 at the tip of the cable-side optical fiber 61 held on the holding stand 58 is taken out from the holding stand 58 and connected to the optical connector adapter 43 of the optical module 4 housed in the module housing portion 51, the cable By removing the duct divided body 531 from the side optical fiber wiring shelf 54, the operation of drawing out the extra length of the cable side optical fiber 61 from the cable side optical fiber wiring shelf 54 can be performed efficiently.

  The addition of the optical module 4 to the module storage unit 51 is preferably performed sequentially from the side of the module storage unit 51 close to the surplus length storage space 34. The tip of the cable-side optical fiber 61 held on the holding stand 58 is inserted and connected to the optical connector adapter 43 of the optical module 4 stored in the module storage unit 51 at a position corresponding to the holding position. If the addition of the optical module 4 to the storage unit 51 is sequentially performed from the side of the module storage unit 51 close to the extra length storage space 34, the extra length of the cable side optical fiber 61 is drawn from the cable side optical fiber wiring shelf 54. The removal of the duct divided body 531 for the work such as the above is also performed in order from the duct divided body 531 on the side close to the surplus length accommodating space 34, and the termination terminated into the terminated optical fiber duct 53 in advance. There is no need to move the optical fiber 71.

As shown in FIGS. 4 and 5, in this termination unit 5, the surplus length of the cable-side optical fiber 61 is reduced in the cable-side optical fiber wiring shelf 54 by the curved wiring on the cable-side optical fiber wiring shelf 54. Can be stored. For this reason, when connecting the cable side optical fiber 61 with the tip portion taken out from the holding table 58 to the optical connector adapter 43 of the optical module 4, the extra length from the cable side optical fiber wiring shelf 54 is replaced with the cable side optical fiber wiring shelf. The cable-side optical fiber 61 can be made to function as a pull-out surplus length for pulling out the cable-side optical fiber 61 from 54.
In the case of the cable-side optical fiber wiring shelf 54 that projects from the bottom of the module housing 51 to the work surface side of the termination unit 5, a wide area for bending the cable-side optical fiber 61 is secured. And a sufficient amount of extra length can be secured.

  As described above, the cable-side optical fiber 61 connected to the termination unit 5 has a structure in which the tip of the cable-side optical fiber 61 can be retained on the retaining stand 58 provided in the termination unit 5. Since the drawing of the distal end portion can be completed before the optical module 4 is stored in the module storage portion 51, for example, each time the optical module 4 is added, the termination unit 5 of the cable-side optical fiber 61 is provided. The cable side optical fiber 61 can be quickly connected to the optical module 4 without being pulled into the cable, and the cable unit optical fiber 61 and the termination optical fiber 71 are connected in the termination unit 5. Can be improved.

As a configuration (movable support mechanism) that allows the entire terminated optical fiber duct 53 or the duct divided body 531 to be moved to open and close the overhanging portion 54a of the cable side optical fiber wiring shelf 54, for example, FIG. As shown in FIG. 8, each of the duct divided bodies 531 of the termination optical fiber duct 53 can be individually rotated up and down by a rotation support mechanism 542 (hinge, movable support mechanism) provided in the termination unit 5. A supported structure can also be employed. In this case, the termination unit 5 is provided with a holding mechanism (falling prevention stopper) for holding the terminated optical fiber duct 53 rotated upward from the cable side optical fiber wiring shelf 54 at a predetermined position. Is preferred.
Further, as the movable support mechanism, it is also possible to adopt a structure that supports the entire terminated optical fiber duct 53 or the duct divided body so that it can be pulled out to the working surface side of the terminated unit 5.

As shown in FIGS. 8 and 9, the cable side optical fiber wiring shelf 54 may be provided with an extra length storage tray 543 for storing the extra length of the cable side optical fiber 61. In this case, the surplus length of the cable side optical fibers 61 can be stored in a compact manner by the surplus length storage tray 543, which is advantageous in preventing congestion of the cable side optical fibers 61 on the cable side optical fiber wiring shelf 54.
In addition, the above-described holding table 58 is configured to support the holding unit 581 near the optical connector adapter 43 of the optical module 4 stored in the module storage unit 51 on the cable-side optical fiber wiring shelf 54. Although it is configured to protrude upward from the fiber wiring shelf 54, the storage position of the tip end portion of the cable side optical fiber 61 on the cable side optical fiber wiring shelf 54 is not limited to this. It is also possible to store the fiber wiring shelf 54 on the overhanging portion 54a (that is, the gap between the overhanging portion 54a and the termination optical fiber duct 53).

  As shown in FIG. 1A, the surplus length storage space 34 accommodates the surplus length 71 a of the termination optical fiber 71 drawn from the wiring rack 3 to the termination rack 2. The surplus length 71 a of the termination optical fiber 71 accommodated in the surplus length storage space 34 is the end of the termination optical fiber duct 53 of the termination unit 5 into which the termination optical fiber 71 is drawn, on the side of the surplus length accommodation space 34. It is bent into a U shape so as to hang downward from the portion (hereinafter also referred to as the introduction end portion 53a) and the alignment boards 33A and 33B. Further, the extra length storage space 34 is located between the termination unit 5 and the alignment plates 33A, 33B due to the vertical dimension of the lower extension space 34a extending below the connection panel unit 22 and the alignment plates 33A, 33B. In the case where the extra length 71a of the secured termination optical fiber 71 is long, the termination unit 5 located at the lower part of the connection board 23, 24 on the front side or the rear side, and the alignment element located at the lower part of the alignment boards 33A, 33B The U-shaped bending process can be reliably performed for the extra length 71a secured between the end optical fiber 71 and the extra length 71a of all the terminated optical fibers 71 drawn into the termination rack 2 from the wiring rack 3. Can be subjected to a U-shaped bending process that hangs down between the termination unit 5 and the alignment boards 33A and 33B.

  In this optical wiring board 1, the connection board unit 22 having the front side connection board 23 and the rear side connection board 24 is adopted, so that the connection board unit 22 is formed with the sufficient number of storage cores. The installation is realized at a position spaced upward from the installation floor 8 where the end rack 2 and the wiring rack 3 are installed, that is, above the optical wiring board 1 as much as possible. Further, the alignment boards 33A and 33B are also installed at positions separated upward from the installation floor 8 by adopting flat alignment elements 33a. As a result, in the optical wiring board 1, a sufficient size (in this case, the size in the vertical direction) is secured in the downward extension space 34 a of the extra length storage space 34, and all the terminated optical fibers 71 are secured. For the extra length 71a, a U-shaped bending process that hangs down between the termination unit 5 and the alignment boards 33A, 33B is realized, and the number of storage cores is ensured by securing the number of termination units 5 installed. Is sufficiently secured.

As shown in FIG. 1A and FIG. 2, the cable side optical fiber 61 may be removably retained by a fiber fixing portion 55 provided on a side portion of the connection panel unit 22 on the extra length storage space 34 side. it can. The fiber fixing portion 55 is installed for each termination unit 5 and holds the cable side optical fiber 61 in the vicinity of the introduction end portion 53a of the termination optical fiber duct 53 of the target termination unit 5 to be drawn. Can do. Since the fiber fixing portion 55 has a structure for fixing the termination optical fiber 71 by attaching a detachable fixing member 55a (see FIG. 1A), the fiber fixing portion 55 is formed between the termination units 5 due to switching connection or the like. When performing operations such as relocating the end optical fiber 71, the fixing member 55a is detached from the fiber fixing portion 55, so that the termination optical fiber 71 can be easily fixed, which is advantageous in terms of ensuring workability. . Further, as shown in FIG. 2, the cable side optical fiber 61 is provided corresponding to each termination unit 5 of the front side connection board 23 and arranged in multiple rows in the vertical direction, The cable-side optical fiber wiring shelf is provided via a drawing space 55b provided corresponding to each termination unit 5 of the side connection panel 24 and secured between the upper and lower rows of fiber fixing portions 55. 54.
As in the illustrated example, the wiring route of the cable side optical fiber 61 from the cable storage space 25 to the front side connection board 23 and the wiring route of the cable side optical fiber 61 from the cable storage space 25 to the back side connection board 24 are as follows. If the configuration is divided, even if the number of the cable-side optical fibers 61 is large, congestion of the cable-side optical fibers 61 can be avoided, and the optical module from the end of the optical fiber cable 6 drawn into the termination rack 2 can be avoided. There is an advantage that the workability of the work of wiring the cable side optical fiber 61 up to 4 and the work such as relocation and removal can be improved.

In the illustrated optical distribution board 1, the vertical position of the termination unit 5 of the front side connection board 23 that constitutes the connection board unit 22 and the vertical position of the termination unit 5 of the back side connection board 24 are aligned. The fiber fixing portion 55 provided for each termination unit 5 of the front side connection panel 23 and the fiber fixing portion 55 provided for each termination unit 5 of the rear side connection panel 24 are aligned in the vertical position. ing. The fiber fixing portions 55 arranged side by side via the lead-in space 55b are connected by a connecting plate 55c (shown only in FIG. 2) that can be retrofitted, thereby constituting one unit (fixing portion unit 55d). The cable-side optical fiber 61 is drawn from the cable storage space 25 through a pair of fiber fixing portions 55 and a connecting plate 55c arranged side by side through the drawing space 55b, that is, inside the fixing portion unit 55d. Is routed so as to reach the cable-side optical fiber distribution shelf 54.
On the other hand, the termination optical fiber 71 is not wired inside the fixed unit 55d, but passes through the outside of the fixed unit 55d, so that the termination optical fiber duct of the termination unit 5 from the alignment boards 33A and 33B. 53 is drawn and wired. For this reason, in the extra length storage space 34, the cable-side optical fiber 61 and the terminated optical fiber 71 are wired separately inside and outside the fixed unit 55d, so that congestion can be prevented.

  In this optical wiring board 1, a termination optical fiber 71 drawn from the wiring rack 3 to the termination rack 2 is mounted on the optical module 4 of the termination unit 5 of the connection boards 23 and 24 on the front side or the rear side. By connecting the optical connector adapter 42 to the optical connector adapter 42, the cable-side optical fiber 61 and the optical fiber 71 that are terminated so as to be connectable by the optical connector adapter 42 are optically connected. The path can be connected to a transmission device or the like connected to the termination optical fiber 71. The termination optical fiber 71 can be switched and connected to the optical connector adapter 42 of the optical module 4 by the optical connector 72 at the tip, whereby the termination optical fiber 71 is connected to the optical line on the optical fiber cable 6 side. Can be switched.

  As shown in FIG. 2, the termination optical fiber 71 drawn from the wiring rack 3 to the termination rack 2 is drawn into the front-side connection board 23 and the rear-side connection board 24 by the distribution wiring in the extra length storage space 34. You can choose to pull in. Accordingly, the switching connection of the termination optical fiber 71 to the optical connector adapter 42 of the optical module 4 is switched between the optical connector adapter 42 of the optical module 4 housed in the termination unit 5 of the front connection panel 23 and the rear connection panel. When the connection is performed with the optical connector adapter 42 of the optical module 4 accommodated in the termination unit 5, the front side connection panel 23 and the rear side connection panel 24 are changed by changing the wiring route in the extra length accommodation space 34. By changing the drawing-in destination of the termination optical fiber 71 from one to the other, it is possible to easily select the terminating unit 5 as the drawing-in destination, and to ensure the workability of the switching connection.

  Moreover, in this optical distribution board 1, the termination unit 5 installed in the termination rack 2 is installed separately in the front side connection board 23 and the back side connection board 24, so that the installation position of the termination unit 5 is set. As far as possible above the optical wiring board 1, a U-shaped bending process is realized in which the surplus length 71 a of all the terminating optical fibers 71 hangs down between the terminating unit 5 and the alignment boards 33 </ b> A and 33 </ b> B. As a result, the surplus length processing method of the termination optical fiber 71 is unified, so that the termination optical fiber 71 is switched to the optical connector adapter 42 of the optical module 4 and connected to the optical connector adapter 42 of the optical module 4. Termination optical fiber 71 (working optical fiber 712) is increased (such as changing the holding optical fiber 711 to the working optical fiber 712) and removed (the working optical fiber 712 is changed to the holding optical fiber 711). Workability further be such to) can ensure.

Needless to say, the present invention is not limited to the above-described embodiments, and various modifications are possible.
For example, the connector termination of the cable-side optical fiber by the optical connector mounted on the optical module is performed by the optical connector 62 at the tip of the cable-side optical fiber 61 by the optical connector adapter 43 of the optical module 4 as in the above-described embodiment. Is not limited to the connector connection with the optical fiber 44 in the optical module 4, but in addition to the optical fiber in the optical module, one end of which is terminated in advance by the optical connector of the optical module. It can also be realized by fusion splicing to the end or the like. However, connector connection with the optical fiber 44 in the optical module 4 using the optical connector 62 at the tip of the cable-side optical fiber 61 is advantageous in terms of termination workability.
The optical wiring board according to the present invention is not limited to the structure having the termination rack and the wiring rack as described above, and various structures can be adopted. Further, the present invention is not limited to the one provided with both the front side connection board 23 and the back side connection board 24, for example, an optical distribution board having a configuration having only one connection board in which the termination unit is mounted in upper and lower stages, Even an optical wiring board having a structure in which only one termination unit according to the present invention is mounted is included in the optical wiring board according to the present invention.

It is a figure which shows the optical wiring board which concerns on this invention, (a) is a front view, (b) is a side view. It is an AA arrow directional view of FIG.1 (b). It is a BB arrow directional view (partial sectional view) of Drawing 1 (a). It is a figure which shows the termination | terminus unit mounted in the optical wiring board of FIG. 1, Comprising: (a) is a top view, (b) is a front view. It is a side view which shows the structure of the termination | terminus unit of FIG. It is a figure which shows the support structure of the duct for termination optical fibers in the termination unit of FIG. It is a perspective view which shows an example of the reservation part of the reservation stand of the termination unit of FIG. It is a figure which shows another aspect of the movable support mechanism of a termination unit. It is a top view which shows the example which provided the extra length storage tray in the cable side optical fiber wiring shelf of a termination unit. It is a perspective view which shows the alignment element provided in the wiring rack of the optical wiring board of FIG. FIG. 11 is a cross-sectional view taken along the line CC of FIG. 10 and shows a cross-sectional structure of the alignment element. It is a perspective view which shows the storage element provided in the wiring rack of the optical wiring board of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Optical wiring board, 4 ... Optical module, 42 ... Optical connector (optical connector adapter), 43 ... Optical connector (optical connector for cable connection, optical connector adapter), 5 ... Termination unit, 51 ... Module storage part, 53 ... Wiring duct (terminated optical fiber duct), 54 ... Cable-side optical fiber wiring shelf, 6 ... Optical fiber cable, 61 ... Optical fiber (cable-side optical fiber), 62 ... Optical connector (optical connector plug), 71 ... Another optical fiber (terminated optical fiber), 711 ... terminated optical fiber (holding optical fiber), 712 ... terminated optical fiber (active optical fiber), 72 ... optical connector (optical connector plug).

Claims (8)

An optical connector (43) for terminating the cable side optical fiber (61), which is an optical fiber extended from the end of the optical fiber cable (6), to another optical fiber (71) is attached. A termination unit (5) for storing a plurality of case-like optical modules (4) arranged side by side;
The termination unit is
A module storage section (51) for storing a plurality of optical modules in a horizontal manner so that the optical module can be pulled out;
A module housing portion for the optical connector that is provided at a lower portion of the module housing portion on the work surface side from which the optical module is pulled out and is attached to an end portion of the optical module on the work surface side. A wiring duct (53) through which the other optical fiber connected by a connector from the work surface side is wired;
A cable-side optical fiber that is provided below the wiring duct on the work surface side of the module housing portion and can accommodate the extra length of the cable-side optical fiber wired from the work surface side of the module housing portion to the optical module. An optical wiring board (1) having a wiring shelf (54).   The wiring duct is supported by a movable support mechanism so as to be displaceable with respect to the module housing portion, and the cable-side optical fiber wiring shelf can be opened and closed by the displacement of the wiring duct. The optical distribution board according to 1.   3. The optical wiring board according to claim 2, wherein the movable support mechanism is a rotation support mechanism that supports the wiring duct so as to be rotatable up and down.   The wiring duct is divided into a plurality of duct division bodies in the extending direction along the lateral direction of the module housing portion, and each duct division body can be individually rotated up and down by the rotation support mechanism. The optical wiring board according to claim 3, wherein the optical wiring board is supported by the optical wiring board.   5. The optical wiring board according to claim 3, further comprising a holding mechanism for holding the wiring duct rotated upward from the cable side optical fiber wiring shelf in a predetermined position.   The optical termination board according to any one of claims 1 to 5, wherein the termination unit is provided with a holding base that holds the tip end portion of the cable-side optical fiber side by side and in a plurality of arrangement states.   The optical distribution board according to any one of claims 1 to 6, wherein an extra-length storage tray is stored in the cable-side optical fiber wiring shelf.   The cable-side optical fiber is an optical fiber with a connector which is terminated by an optical connector so as to be connectable to a cable-connecting optical connector provided at an end portion on the work surface side of the optical module. An optical wiring board according to any one of claims 1 to 7.

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