JP4184328B2 - 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.

As an optical distribution board provided in the facility center of the optical communication network, for example, as shown in FIGS. 13A and 13B, a cable housing rack 101 (wiring rack) into which an in-house wiring cable 110 such as a so-called floor cord cable is drawn. ) And an optical fiber cable 120 such as an off-site cable (external optical fiber cable) are drawn in, and a large number of optical connectors that can be connected to the optical fiber 121 of the optical fiber cable 120 are arranged into a group configuration. There is provided a terminal board housing rack 102 for connecting an optical fiber cable 120 to a transmission device or the like. Conventionally, as the terminal board housing rack 102, for example, front maintenance of a structure in which units 140 each housing a plurality of thin case-like optical modules 130 each having an optical connector adapter 131 mounted on a side surface are mounted on the rack body 150 in multiple upper and lower stages. A type connection board is widely adopted. An optical connector (optical connector plug, not shown) that terminates the optical fiber 121 on the optical fiber cable 120 side so that the connector can be connected is connected to the optical connector adapter 131 from the inside of the optical module 130.
In this front maintenance type connection panel, the optical module 130 can be pulled out from the unit 140 only to one side of the connection panel (the left side surface in FIG. 13B). In each unit 140, the optical module 130 is accommodated so that the optical connector adapter 131 faces the work surface. The optical module 130 can be inserted into the unit 140 only from the work surface side.
The optical fiber 111 exposed at the end of the in-house wiring cable 110 is pulled into the terminal board housing frame 102, and the optical connector 112 (optical connector plug) attached to the tip of the optical fiber 111 is connected to the optical connector adapter 131 from the work surface side. Then, the optical connector 112 is connected from the inside of the optical module 130 to the optical connector connected to the optical connector adapter 131 in the optical connector adapter 131, so that the in-house wiring cable 110 connected to the transmission device etc. Optical connection between the optical fiber 111 and the optical fiber 121 on the optical fiber cable 120 side is realized. Further, the optical connector 112 at the tip of the optical fiber 111 is switched and connected to the optical connector adapter 131 of the optical module 130 to switch the connection between the optical line on the local wiring cable 110 side and the optical line on the optical fiber cable 120 side. be able to.

The cable storage rack 101 is equipped with an alignment unit 160 (alignment panel) that aligns the optical fibers 111 exposed at the ends of the plurality of in-house wiring cables 110 drawn into the rack. The part pulled out from the alignment unit 160 is pulled into the terminal board housing rack 102, and the optical connector 112 at the tip is connected to the optical connector adapter 131 of the optical module 130 from the work surface side of the terminal board housing rack 102. Further, in the extra length accommodation space 170 secured between the alignment section 160 and the terminal board housing rack 102, the extra length 111a of the optical fiber 111 secured between the alignment section 160 and the terminal board housing rack 102. However, it is accommodated by being bent into a U shape so as to hang downward from the alignment portion 160 and the terminal board accommodating rack 102.
In addition, as literature which discloses the optical wiring board which has a front maintenance type | mold connection board, there exist patent document 1, 2, etc., for example.
JP 2003-215353 A JP 2001-004848 A

However, in the case of the optical wiring board described above, the bending process of the extra length 111a of the optical fiber 111 in the extra length accommodation space 170 is caused to hang downward from the alignment portion 160 and the terminal board accommodation rack 102 as described above. Since it is bent in a U shape and accommodated in the extra length accommodating space 170, it is connected to the optical connector adapter 131 of the optical module 130 accommodated in the unit 140 located below the terminal board accommodating rack 102. For the optical fiber 111, a case may occur in which the bending process in which the extra length 111 a is suspended in the extra length accommodation space 170 cannot be performed. In view of this, an attempt has been made to install a guide member, a clamp member, or the like at the bottom of the extra-length accommodating space 170, and to perform bending processing, alignment, or the like of the optical fiber wired to the bottom of the extra-length accommodating space 170. However, a large number of optical fibers 111 are accumulated at the bottom of the extra length accommodation space 170 and are easily congested. Since it becomes necessary to change the handling of the optical fiber, it causes a reduction in efficiency of work such as relocation associated with the switching connection. In addition, there is a problem that the installation of a guide member, a clamp member, etc. may cause an increase in cost.
If the mounting position of the alignment unit 160 in the cable housing rack 101 and the mounting position of all the units 140 in the terminal board housing rack 102 are set as high as possible on the rack, all the optical fibers 111 can be accommodated in the extra length housing space 170. Although it is possible to perform surplus length processing that hangs down and curves in a U-shape, it is difficult to reduce the vertical dimension of the unit 140 as compared to the alignment section 160 with a high degree of design freedom. This time, there is a complaint that it becomes difficult to secure the number of optical cores accommodated.

  In view of the above problems, the present invention provides a bending process for extra length of an optical fiber accommodated in an extra length accommodation space secured between a connection board unit and an alignment board between the connection board unit and the arrangement board. Optical wiring board that can be unified to the process of being bent into a U-shape and can be improved in workability such as relocation associated with optical fiber switching connection, and can greatly increase the number of housing cores The purpose is to provide.

In order to solve the above problems, the present invention provides the following configuration.
The invention according to claim 1 is an optical distribution board for connecting an optical fiber of an optical fiber cable and a termination optical fiber having an optical connector attached to a tip thereof, wherein the optical fiber of the optical fiber cable is formed of the optical fiber. A termination rack having a connection panel unit with a plurality of optical connectors that can be connected to the end optical fiber and having a connector array surface on the front side and the rear side, and installed next to this termination rack And secured between a wiring rack provided with an alignment board for aligning and supporting the terminated optical fiber, and the connection board unit and the alignment board, and drawn from the alignment board to the connection board unit. The surplus length of the terminated optical fiber connected to the optical connector of the connection board unit is bent in a U shape so as to hang down between the connection board unit and the alignment board. And the connecting panel unit and the alignment panel are installed at positions spaced upward from an installation floor on which the termination rack and the wiring rack are installed, In the space, a lower extension space extending below the connection board unit and the alignment board is secured, and the alignment boards are provided on the front side and the back side of the wiring rack, respectively. A termination optical fiber drawn from the alignment board to the connection board unit and a termination optical fiber drawn from the rear side arrangement board to the connection board unit are secured between the connection board unit and the alignment board. In addition , the optical wiring board is configured to be selectively retracted with respect to the front-side connection board and the back-side connection board through the extra length accommodation space .
According to a second aspect of the present invention, in the optical wiring board according to the first aspect, a cable housing space into which the end of the optical fiber cable is drawn is secured on the termination frame below the connection board unit. It is characterized by being.
According to a third aspect of the present invention, in the optical wiring board according to the first or second aspect, the connection board unit includes a front side connection board on the front side and a rear side connection board on the rear side, and the front side connection board. And the back side connection panel is a module housing that houses a plurality of thin optical modules having a thin external appearance, and is arranged side by side and the optical connectors attached to the side portions of the respective optical modules are arranged side by side. The module housing unit includes a module housing portion for housing the optical module, and a switching operation for switching the terminated optical fiber from the module housing portion to the optical connector of the optical module. A termination optical fiber duct projecting on the working surface side and wired with the termination optical fiber, and provided under the module housing portion and drawn on the termination rack. Wherein the filled-in optical fiber cables terminal exposed to the optical fiber has a duct for the cable-side optical fibers are wired.
According to a fourth aspect of the present invention, in the optical wiring board according to any one of the first to third aspects, the optical module is arranged on the work surface side where the switching connection work of the terminated optical fiber to the optical connector is performed. An optical connector for cable connection to which an optical fiber exposed at a fiber cable terminal is connected by connector, and the optical fiber exposed at the optical fiber cable terminal is connected to the optical connector for cable connection; The optical module is terminated by an optical connector on the work surface side of the optical module through an optical fiber accommodated in the optical module so that the connector can be connected to the terminated optical fiber. To do.
According to a fifth aspect of the present invention, in the optical wiring board according to any one of the first to fourth aspects, the front side and the rear side of the wiring rack are connected to an optical connector of an optical module among the terminated optical fibers. A holding element for holding a terminal of an unterminated optical fiber is provided.
According to a sixth aspect of the present invention, in the optical wiring board according to the fifth aspect, the alignment board is configured by stacking a plurality of thin-plate-like alignment elements, and provided on the front side and the back side of the wiring rack, respectively. The alignment element includes a first gate portion through which the termination optical fiber wired from the alignment board to the connection board unit is passed, and the termination optical fiber wired from the alignment board to the holding element. A second gate portion that is passed through, wherein the first gate portion and the second gate portion are routed from a termination optical fiber drawn from the alignment board to the connection board unit, and from the alignment board The installation positions and / or orientations of the alignment elements should be different from each other corresponding to the wiring route of the terminated optical fiber drawn into the holding element. And butterflies.
The invention according to claim 7 is the optical wiring board according to any one of claims 1 to 6, wherein the wiring rack includes the wiring on the upper side or the lower side of the front-side alignment board and the rear-side alignment board. A termination optical fiber that is drawn from the alignment board on the front side of the rack to the back side connection board and / or a termination optical fiber that is drawn from the alignment board on the back side of the wiring rack to the front side connection board. A crossover wiring shelf wired in the front-rear direction is provided.

According to the optical wiring board of the present invention, the following excellent effects can be obtained.
(1) The number of accommodating cores (corresponding to the number of cores supported by the connection board unit in which multiple optical connectors that can be connected to the optical fiber of the optical fiber cable are installed on the front side and the back side are mounted on the termination rack. (The number of cores) can be sufficiently secured, and a sufficient size (particularly the vertical dimension) can be secured in the extension space below the extra length accommodation space extending below the connection board unit and the alignment board. As a result, it is possible to easily realize the bending process of the surplus length of all the terminated optical fibers drawn from the wiring rack to the termination rack by the hanging method in the surplus length accommodating space. If the extra length processing of the terminated optical fiber in the extra length accommodating space is unified to the hanging system for all the terminated optical fibers, it will be accompanied by switching connection of the terminated optical fiber to the optical connector of the optical module of the terminated frame, etc. Good workability such as relocation, expansion and removal of termination optical fiber can be secured.
(2) The termination optical fiber drawn from the alignment board to the termination rack can be freely selected from the front side of the connection board unit and the rear side of the connection board unit through the extra length accommodation space. As a result, it is possible to switch and connect all the terminated optical fibers to each optical fiber of the optical fiber cable, and the terminated optical fiber is drawn to the front side of the connection panel unit and to the back side. The structure distributed to the wiring route has an advantage that the workability of the switching connection of the terminated optical fiber to the optical connector of the connection panel unit can be ensured even when the number of accommodating cores is large.

Hereinafter, an optical wiring board embodying the present invention will be described with reference to the drawings.
1 is an overall perspective view showing an optical wiring board 1 according to the present invention, FIG. 2 is a drawing showing the optical wiring board 1, FIG. 1A is a front view, FIG. 1B is a side view, and FIG. 4B is a cross-sectional view taken along the line B-B in FIG. 2A, and FIG. 5 is a diagram illustrating the module housing unit 5 mounted on the termination 2 of the optical wiring board 1. FIG. FIG. 6 is a diagram showing the module housing unit 5, (a) is a plan view, (b) is a front view, and FIG. 7 is a side view showing the module housing unit 5 (however, an optical connector of an optical module) 8 is a perspective view showing the alignment element 33a, FIG. 9 is a perspective view taken along the line CC of FIG. 8, and FIG. 10 is a perspective view showing the retaining element 35. As shown in FIG.
As shown in FIG. 1 and FIG. 2A, the optical wiring board 1 has 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. 2 (a) front side of the paper, left side of FIG. 4)) and rear side (back side of the optical wiring board 1 (FIG. 2 (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 the connector are installed on the rear side (right side in FIG. 4)). 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 accommodated 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. 4 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 configured by a plurality of module housing units 5 attached to the rack body 21 in multiple upper and lower stages. The module housing unit 5 houses a plurality of optical modules 4 formed in a thin outer appearance in a vertically arranged and horizontally arranged state. The configuration of the module housing 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 configured by the module housing units 5 mounted on the rack body 21 in six stages. The number of module housing units 5 constituting the back side connection panel 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 housing space 25 secured in the lower part of the termination rack 2.

As shown in FIGS. 5, 6 (a), 6 (b), and 7, the module housing unit 5 has a frame-shaped module housing portion 51, and the optical module 4 is placed in the module housing portion 51. A plurality of devices are housed in a vertically arranged horizontally arranged state.
As shown in FIGS. 5 and 7, the optical module 4 has optical connectors 42, 43 at one end (front end, part of the side) of a plastic flat case-shaped module main body 41 formed in a thin plate shape. (Here, it is an optical connector adapter or an optical connector receptacle depending on its shape, but the optical connector receptacle may also be called an optical connector adapter).
In the front-side connection board 23, the optical module 4 includes the module housing unit 5 in such a direction that the optical connector adapters 42 and 43 are on the front side of the optical wiring board 1 (the front side in FIG. 2A and the left side in FIG. 4). Is housed in the module housing portion 51. On the other hand, in the back side connection board 24, the optical module 4 accommodates the module in such an orientation that the optical connector adapters 42 and 43 are on the back side of the optical wiring board 1 (FIG. It is accommodated in the module accommodating part 51 of the unit 5.
In FIG. 5, reference numeral 42 a denotes a cap that is detachably attached to the optical connector adapter 42. If the cap 42 a is removed from the optical connector adapter 42, the optical connector 72 at the tip of the terminated optical fiber 71 can be inserted and connected to the optical connector adapter 42.

  The front-side connection board 23 inserts the optical module 4 into the module housing unit 5 (specifically, module housing portion 51) from the front side of the optical wiring board 1, and from the module housing 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 module housing unit 5 (specifically, module housing portion 51) from the back side of the optical wiring board 1, and from the module housing 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) where the optical module 4 is inserted into and removed from the module housing 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). Also, hereinafter, the back side (back side of the optical wiring board 1) where the optical module 4 is inserted into and pulled out from the module housing 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. Also, hereinafter, regardless of whether the connection board on which the module housing unit 5 is mounted is the front side connection board 23 or the back side connection board 24, the side where the optical module 4 is drawn out from the module housing unit 5 is 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 module housing unit 5 of the front side connection board 23 and the back side connection board 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 module housing 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 module housing unit 5 when the optical module 4 is brought into contact therewith. There is no need to touch.

As shown in FIGS. 4 and 7, the module housing unit 5 of the front connection board 23 and the module housing 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. 4). 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 inserting an optical fiber cable between the module storage unit 5 of the front side connection panel 23 and the module storage unit 5 of the rear side connection panel 24. It is also possible to adopt a configuration that ensures the above. However, if the module housing unit 5 of the front connection board 23 and the module housing unit 5 of the rear connection board 24 are arranged close to each other, the dimension in the depth direction of the termination frame 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 housing space 25 of the termination rack 2 and is fixed by a cable fixture 25 a provided in the cable housing space 25. However, the drawing position of the optical fiber cable 6 into the termination rack 2 is not necessarily in the cable housing 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. 7).
As shown in FIGS. 2A and 3, the cable-side optical fiber 61 is provided between the connection board unit 22 and the alignment boards 33 </ b> A and 33 </ b> B from the cable housing space 25 at the center of the optical wiring board 1. It is drawn into the target module housing unit 5 from the side portion (side portion on the wiring rack 3 side) of the connection panel unit 22 via the secured extra length housing space 34 (described later). 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. 7 is specifically described, a multi-core optical fiber ribbon is adopted as the cable-side optical fiber 61, and an MT-type optical connector is used as the optical connector 62 that terminates the tip of the cable-side optical fiber 61. An optical connector ferrule (hereinafter referred to as an MT type optical connector) used in (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-core 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 terminated 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 module housing 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 an 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. 2 (a), 2 (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. It is drawn into the cable housing space 31 secured in the lower part of the wiring rack 3 and is fixed by the cable fixture 32 provided in the cable housing 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. In the wiring rack 3, two alignment boards 33A and 33B are provided with their positions shifted in the depth direction of the wiring rack 3 (the vertical direction in FIG. 3, the horizontal direction in FIG. 4, in other words, the front-rear direction). The alignment boards 33A and 33B have a structure in which thin-plate-like alignment elements 33a (see FIG. 8) 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 module accommodation unit 5 of the connection board unit 22 via the extra length accommodation space 34 secured between the connection board unit 22 of the termination rack 2 and the alignment boards 33A and 33B. It is supposed to be drawn.
Note that the alignment element 33a alone can function as the alignment board according to the present invention.

  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 housing 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 accommodation 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 accommodation space 34 is formed in 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. 2B and 3, a termination optical fiber 71 (hereinafter referred to as the optical fiber adapter 4) that is not connected to the optical connector adapter 42 of the optical module 4 is connected to the wiring rack 3. 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. 10, the holding element 35 is a case-like member that removably 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 open / close door to the outside of the wiring rack 3 (see the phantom line in FIG. 3), and the optical connector 72 at the tip of the termination optical fiber 71 can be accommodated and taken out.

FIG. 8 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. 8 and 9, the alignment element 33 a is a flat cylindrical body formed in an outer 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 housing space 33d for housing the termination optical fiber 71 is secured between the optical fiber housing 33c and the terminal 33c. The optical fiber accommodation space 33d passes through the alignment element 33a, and has openings on both sides of the alignment element 33a. The optical fiber housing space 33d refers to the entire internal space of the alignment element 33a.

A terminating optical fiber 71 (terminated optical fiber denoted by reference numeral 712 in FIG. 8) that is laid through and 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 housing space 33d is formed 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 the lead-in gate portion 333. And the first gate portion 331 which is the other opening of the optical fiber accommodation 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 accommodation space 33d.

As shown in FIG. 3, 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 side of the extra length accommodating space 34, and the second gate portion 332 and the drawing gate portion 333 are on the opposite side. The
Further, as shown in FIG. 9, 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 accommodating 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 housing 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 drawing gate portion 333 from the portion accommodated in the alignment element 33a, 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 housing 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. In FIG. 8, as shown by the phantom line, 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. 9) 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 FIGS. 5 and 7, the module housing unit 5 performs the switching connection work of the terminated optical fiber 71 from the module housing portion 51 to the optical connector adapter 42 of the optical module 4 from the module housing portion 51. A terminating optical fiber duct 53 projecting from the working surface side, and a cable-side optical fiber duct 54 provided below the module housing portion 51. The termination optical fiber duct 53 is located closer to the work surface than the cable side optical fiber duct 54.
The provision of the cable-side optical fiber duct 54 below the module housing portion 51 means that the entire module-side optical fiber duct 54 is installed on the work surface side of the module housing portion 51 compared to the module housing unit 5. There is an advantage that the dimension in the depth direction can be reduced.

  The terminating optical fiber duct 53 extends to the left and right along the extending direction of the module housing unit 5 extending along the left and right direction of the terminating rack 2 (left and right in FIG. 2A). 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. 6A and 7, in the terminated optical fiber 71 connected to the optical connector adapter 42 of the optical module 4, the terminated light is transmitted from the optical module 4 to the work surface side of the module housing 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 duct 54 extends to the left and right along the module housing unit 5 in parallel with the termination optical fiber duct 53. The cable-side optical fiber duct 54 is connected to the optical connector adapter 43 of the optical module 4 by being drawn into the module housing unit 5 from the end of the optical fiber cable 6 introduced into the termination rack 2. 61 is wired. The cable-side optical fiber 61 is drawn from the extra-length accommodating space 34 into the cable-side optical fiber duct 54 of the target module accommodating unit 5 and wired to the target optical module 4.
As shown in FIG. 7, the cable-side optical fiber duct 54 has a portion (projected portion 54 a) that projects from the module housing portion 51 to the work surface side, and the cable-side optical fiber 61 is opened upward. It is connected to the optical connector adapter 43 of the target optical module 4 so as to be pulled up from the projecting portion 54 a to the work surface side of the module housing unit 5.

The termination optical fiber duct 53 and the cable-side optical fiber duct 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.
Further, the cable-side optical fiber duct 54 is not limited to a configuration in which the cable-side optical fiber 61 can be drawn from the surplus length accommodation space 34 side, and the cable side optical fiber 61 from the side opposite to the surplus length accommodation space 34. The structure which can be pulled in may be sufficient. In this case, it is easy to avoid interference between the terminated optical fiber 71 and the cable-side optical fiber 61 drawn from the extra-length accommodating space 34 side, thereby improving the pull-in workability and the workability of switching connection to the optical module. You can plan.

  As shown in FIG. 2A, the surplus length accommodating 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 extra length 71a of the termination optical fiber 71 accommodated in the extra length accommodation space 34 is the end of the termination optical fiber duct 53 of the module accommodation unit 5 into which the termination optical fiber 71 is drawn, on the extra length accommodation space 34 side. 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 accommodating space 34 is between the module accommodating unit 5 and the alignment plates 33A, 33B due to the vertical dimension of the downward extension space 34a extending below the connection plate unit 22 and the alignment plates 33A, 33B. When the surplus length 71a of the secured termination optical fiber 71 is long, the module housing unit 5 positioned 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. For U, a U-shaped bending process that hangs down between the module housing unit 5 and the alignment boards 33A and 33B can be performed.

  In this optical wiring board 1, the connection board unit 22 having the front side connection board 23 and the back side connection board 24 is adopted, so that the connection board unit 22 is formed with the sufficient number of accommodating 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 the flat alignment elements 33a. As a result, in this 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 accommodation 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 module housing unit 5 and the alignment boards 33A, 33B is realized, and the number of housing cores is secured by securing the number of installed module housing units 5. Is sufficiently secured.

As shown in FIGS. 2A and 3, the cable-side optical fiber 61 may be removably retained by the fiber fixing portion 55 provided on the side portion of the connection panel unit 22 on the side of the excess length accommodating space 34. it can. The fiber fixing portion 55 is installed for each module housing unit 5, and holds the cable side optical fiber 61 in the vicinity of the introduction end portion 53 a of the termination optical fiber duct 53 of the target module housing unit 5 to be pulled in. 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. 2A), the fiber fixing portion 55 is formed between the module housing 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. . As shown in FIGS. 1 and 3, the cable-side optical fibers 61 are provided in correspondence with the module housing units 5 of the front-side connection board 23, and are arranged in rows of fiber fixing portions 55 that are arranged in multiple stages. And the cable side light via the drawing space 55b provided corresponding to each module housing unit 5 of the back side connection panel 24 and secured between the upper and lower rows of the fiber fixing portions 55. It is drawn into the fiber duct 54.
As in the illustrated example, the wiring route of the cable-side optical fiber 61 from the cable housing space 25 to the front-side connection board 23 and the wiring route of the cable-side optical fiber 61 from the cable housing 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 module housing unit 5 of the front-side connection board 23 constituting the connection board unit 22 and the vertical position of the module housing unit 5 of the back-side connection board 24 are aligned. The fiber fixing portion 55 provided for each module housing unit 5 of the front side connection board 23 and the fiber fixing portion 55 provided for each module accommodation unit 5 of the back side connection board 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. 3) that can be retrofitted, thereby constituting one unit (fixing portion unit 55d). The cable-side optical fiber 61 is drawn from the cable housing space 25 with 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 duct 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 module housing unit 5 passes from the alignment boards 33A and 33B. 53 is drawn and wired. For this reason, in the extra length accommodating 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 module housing 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. 3, 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 accommodation 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 performed by using the optical connector adapter 42 of the optical module 4 accommodated in the module accommodating 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 module accommodating 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 destination of the termination optical fiber 71 from one to the other, it is possible to easily select the module housing unit 5 as the drawing destination, and to ensure the workability of the switching connection.

  Further, in this optical wiring board 1, the module housing unit 5 installed on the termination rack 2 is installed separately on the front side connection board 23 and the back side connection board 24, so that the installation position of the module accommodation unit 5 is set. As far as possible above the optical distribution board 1, a U-shaped bending process is implemented in which the extra length 71a of all the terminated optical fibers 71 is suspended between the module housing unit 5 and the alignment boards 33A and 33B. 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 expanded (reserved optical fiber 711 is changed to working optical fiber 712, etc.) and removed (working optical fiber). The workability can, etc.) or the like to change the hold optical fiber 711 to 12 can be secured.

11A and 11B show a termination optical fiber 71 (working optical fiber 712) drawn into the wiring rack 3 from the front-side alignment board 33A and the rear-side connection board 24, and a rear-side alignment board 33B. An example is shown in which a crossover wiring shelf 9 to which a termination optical fiber 71 (working optical fiber 712) drawn into the front side connection panel 23 is wired is provided. 11 (a) and 11 (b), the crossover wiring shelf 9 is disposed below the front and rear alignment boards 33A and 33B which are provided with their lower end positions substantially aligned.
As shown in FIGS. 11B and 12, the crossover wiring shelf 9 has a plate-like shape, and in the central portion in the extending direction along the front-rear direction (depth direction) of the termination rack 3 of the crossover wiring shelf 9. A bending maintaining member 91 having a curved surface 91a for maintaining the bending state of the terminated optical fiber 71 wired on the crossover wiring shelf 9 is provided.

  The terminated optical fiber 71 that is extended from the front-side alignment board 33A and drawn into the back-side connection board 24 is connected to the wiring rack 3 from the surplus length accommodation space 34 side rather than the curve maintaining member 91 in the transition wiring shelf 9. Is drawn on the front-side shelf 92 located on the front side of the wire, and is routed on the crossover wiring shelf 9 toward the back side of the wiring rack 3. 3 is wired so as to be drawn out from the back side shelf portion 93 located on the back side of 3 to the extra length accommodation space 34 side. Further, the terminated optical fiber 71 that is extended from the rear-side alignment board 33B and drawn into the front-side connection board 23 is drawn from the excess length accommodation space 34 side onto the rear-side shelf portion 93 of the crossover wiring shelf 9. Thus, the wiring on the transition wiring shelf 9 is wired toward the front side of the wiring rack 3 and wired so as to be drawn out from the front side shelf portion 92 to the extra length accommodation space 34 side.

The front-side shelf 92 is located below the front-side alignment board 33A, and the back-side shelf 93 is located below the rear-side alignment board 33B, and the crossover wiring shelf 9 extends from the alignment boards 33A and 33B. Wiring of the terminated optical fiber 71 can be performed by wiring downward from the alignment element 33a (specifically, the first extraction gate portion 331) of the alignment boards 33A and 33B. Further, the termination optical fiber 71 wired from the transition wiring shelf 9 to the connection board unit 22 hangs downward from the module accommodation unit 5 and the connection wiring rack 9 of the connection board unit 22 so as to hang downward. Extra length processing is performed by bending the U-shaped curve inside. In this regard, it is preferable that the installation position of the crossover wiring shelf 9 is as high as possible in the wiring rack 3. In the illustrated optical distribution board, the lower end positions of the front and rear alignment boards 33A and 33B are above the lower end position of the connection board unit 22, and the installation position of the transition wiring shelf 9 is also higher than the lower end position of the connection board unit 22. It is. The installation position of the transition wiring shelf 9 may be above the front and rear alignment boards 33A and 33B.
Further, the transition wiring shelf 9 is routed to the front-side connection board 23 from the rear-side alignment board 33 </ b> B and to the front-side connection board 23, which is wired with the termination optical fiber 71 drawn from the front-side arrangement board 33 </ b> A to the rear-side connection board 24. It is also possible to separately provide the one to which the termination optical fiber 71 is wired.
In FIG. 12, reference numeral 30a denotes a column of the frame (the rack body 30) that constitutes the wiring rack 3, and the crossover wiring shelf 9 is attached to the column 30a. The front-side shelf 92 and the back-side shelf 93 of the crossover wiring shelf 9 are disposed on both front and rear sides of the wiring rack 3 via the pillars 30a.
The curvature maintaining member 91 is not essential and can be omitted.

  As described above, if the crossover wiring shelf 9 is provided, the terminated optical fiber 71 drawn from the front-side alignment board 33A to the rear-side connection board 24 and the rear-side alignment board 33B to the front side. With respect to the terminated optical fiber 71 drawn into the connection board 23, the extra length accommodating space 34 from the wiring rack 3 corresponding to the positions of the front-side connection board 23 and the rear-side connection board 24 by wiring on the transition wiring shelf 9. Therefore, the termination optical fibers 71 wired in the surplus length accommodating space 34 can be collected corresponding to the front-side connection board 23 and the rear-side connection board 24, and the optical connector of the connection board unit 22 can be selected. Improvement in workability of the switching connection to the adapter 42 can be realized.

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.
Moreover, although the thing of the structure accommodated in the state which arranged the optical module vertically and horizontally and arranged in multiple numbers was illustrated as a module accommodation unit, this invention is not limited to this, For example, the case shape formed in the external thin plate shape It is also possible to employ a configuration in which a plurality of optical modules are accommodated in a horizontally stacked state.

1 is an overall perspective view showing an optical wiring board 1 according to the present invention. It is a figure which shows the optical wiring board of FIG. 1, (a) is a front view, (b) is a side view. It is an AA line arrow directional view of Drawing 2 (b). It is a BB arrow directional view (partial sectional view) of Drawing 2 (a). It is a perspective view which shows the module accommodating unit mounted in the termination rack of the optical wiring board of FIG. It is a figure which shows the module accommodating unit of FIG. 5, Comprising: (a) is a top view, (b) is a front view. It is a side view which shows the structure of the module accommodating unit of FIG. It is a perspective view which shows the alignment element provided in the wiring rack of the optical wiring board of FIG. FIG. 9 is a cross-sectional view taken along the line CC of FIG. 8 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. It is a figure which shows the example which provided the wiring shelf in the optical distribution board of FIG. 1, Comprising: (a) is a front view, (b) is a side view. It is a top view which shows the crossover wiring shelf of FIG. It is a figure which shows the structure of the optical wiring board of a prior art example, Comprising: (a) is a front view, (b) is a sectional side view.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Optical wiring board, 2 ... Termination rack, 22 ... Connection board unit, 23 ... Front side connection board, 24 ... Rear side connection board, 25 ... Cable accommodation space, 3 ... Wiring rack, 8 ... Installation floor, 33A, 33B ... Alignment board, 33a ... Alignment element, 331 ... First gate part, 332 ... Second gate part, 34 ... Extra length accommodation space, 34a ... Lower extension space, 35 ... Reservation element, 4 ... Optical module, 42 ... Light Connector (optical connector adapter), 43 ... optical connector (optical connector for cable connection, optical connector adapter), 5 ... module housing unit, 51 ... module housing portion, 53 ... duct for terminated optical fiber, 54 ... optical fiber on cable side Duct, 6 ... optical fiber cable, 61 ... optical fiber (cable side optical fiber), 62 ... optical connector (optical connector plug), 71 ... optical fiber (terminated optical fiber) Ba), 71a ... extra length, 711 ... terminated optical fiber (hold optical fiber), 712 ... terminated optical fiber (active fiber), 72 ... optical connector (optical connector plug), 9 ... interconnectors shelf.

Claims (7)

An optical distribution board for connecting an optical fiber (61) of an optical fiber cable (6) and a terminated optical fiber (71) having an optical connector (72) attached to the tip,
A connection panel unit (22) in which a connector array surface on which a plurality of optical connectors (42) capable of connecting an optical fiber of the optical fiber cable to the termination optical fiber is provided is provided on the front side and the back side. Termination frame (2) having
A wiring rack (3) provided next to the termination rack and provided with an alignment board (33A, 33B) for aligning and supporting the termination optical fiber (71);
An extra length (71a) of the terminated optical fiber secured between the connection panel unit and the alignment panel and drawn from the alignment panel to the connection panel unit and connected to the optical connector of the connection panel unit. A surplus length accommodating space (34) for accommodating in a U-shaped curved state so as to hang down between the connection panel unit and the alignment panel;
The connection board unit and the alignment board are installed at a position spaced upward from an installation floor (8) where the termination rack and the wiring rack are installed, and the connection board unit and A downward extension space (34a) extending below the alignment board is secured,
The alignment boards are respectively provided on the front side and the back side of the wiring rack,
A termination optical fiber drawn from the front-side alignment board to the connection board unit and a termination optical fiber drawn from the rear-side alignment board to the connection board unit are arranged between the connection board unit and the alignment board. An optical wiring board (1) characterized in that it can be selectively retracted with respect to the front-side connection board and the back-side connection board through the extra-length housing space secured in the space .   The optical distribution board according to claim 1, wherein a cable housing space (25) into which a terminal of the optical fiber cable is drawn is secured on the termination frame, below the connection board unit. The connection panel unit has a front-side connection board on the front side and a rear-side connection board on the back side, and the front-side connection board and the rear-side connection board have a plurality of thin optical modules that are arranged in a vertical arrangement. And the module housing units (5) for housing the optical connectors attached to the side portions of the respective optical modules so that the optical connectors are arranged side by side.
The module housing unit protrudes from a module housing portion (51) for housing the optical module, and a work surface side from which the optical fiber module is switched and connected to the optical connector of the optical module. The terminated optical fiber duct (53) to which the terminated optical fiber is wired and the optical fiber exposed below the optical fiber cable terminal provided under the module housing portion and drawn into the terminated rack are wired. 3. An optical distribution board according to claim 1, further comprising a cable side optical fiber duct (54). The optical module has a cable connection optical connector (43) to which the optical fiber exposed to the optical fiber cable end is connected to the work surface side where the termination optical fiber switching connection work to the optical connector is performed. And
The optical fiber exposed at the optical fiber cable terminal is connected to the optical connector for cable connection, so that the optical connector on the work surface side of the optical module is connected via the optical fiber accommodated in the optical module. The optical wiring board according to any one of claims 1 to 3, wherein the optical termination board is terminated so that a connector can be connected to the terminated optical fiber.   A holding element (35) for holding a terminal of the terminated optical fiber (711) not connected to the optical connector of the optical module among the terminated optical fibers is provided on the front side and the back side of the wiring rack. The optical wiring board according to claim 1, wherein the optical wiring board is provided. The alignment board is formed by overlapping a plurality of thin-plate-like alignment elements (33a), and is provided on the front side and the back side of the wiring rack,
The alignment element includes a first gate portion (331) through which the termination optical fiber wired from the alignment board to the connection board unit is passed, and the termination optical fiber wired from the alignment board to the holding element. A second gate portion (332) through which
The first gate portion and the second gate portion are a termination optical fiber wiring route drawn from the alignment board to the connection board unit, and a termination optical fiber wiring route drawn from the alignment board to the holding element. The optical wiring board according to claim 5, wherein the installation positions and / or orientations of the alignment elements are different from each other.   In the wiring rack, a terminated optical fiber that is drawn from the front alignment board on the front side of the wiring rack to the rear connection board on the upper or lower side of the front alignment board and the rear alignment board, and / or A crossover wiring shelf (9) is provided in which the terminated optical fiber drawn from the rear panel on the rear side of the wiring rack to the front side connection board is wired in the front-rear direction of the termination rack. Item 7. The optical wiring board according to any one of Items 1 to 6.

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