JPH08254620A - Optical wiring board - Google Patents

Abstract

PURPOSE: To provide a branching method for optical fiber cables which assures the easy execution of a post-branching operation after laying of even the multiple optical fiber cables. CONSTITUTION: This optical wiring board has a cabinet 1, a tray housing section T1 which is arranged in this cabinet 1, houses plural trays 6 for connecting the optical fiber cords 3a led out of the optical fiber cable 2 to another optical fibers therein via optical junctures in a laminated state and supports these trays freely movably in and out in the longitudinal direction of the cabinet 1 and a connection switching section 4b which houses connecting cords 3b for connecting the plural trays to each other and switching cords J delineated in the side part of this tray housing section T1 to switchably connect the two trays 6 housed in the tray housing section T1 to parallel with each other on one plane.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an optical fiber cable,
Alternatively, it relates to an optical wiring board of an optical fiber cord.

[0002]

2. Description of the Related Art In order to branch and connect an optical fiber cable to an optical fiber core by optical connection, an optical distribution board in which a large number of optical fibers are terminated to form a group is generally used. These optical distribution boards are trays in which a connector connection part for branch connection of optical fibers, a multi-core single-core branch part, an optical cord for jumpers, and an extra length part accompanying the optical connection of the optical cord are compactly stored. Is a high-density, multi-layered structure.

[0003]

In view of the tendency of optical cables to be multi-core in response to an increase in the amount of transmitted information, the wiring board, in particular, has a larger number of optical connection parts and connections. It has become important to store the extra length compactly. In addition, since the number of optical connection points in the wiring board will be enormous, it is desired to develop an optical wiring board that can quickly perform optical connection work, storage and removal of optical connection parts, or connection switching work. There is.

The present invention has been made in view of the above-mentioned problems, and it is necessary to arrange the optical connector, the fusion splicing portion, the multi-core single-core branch portion, the connection extra length, etc. in a plurality of trays and store them compactly. It is an object of the present invention to provide an optical distribution board which can be improved and has improved work efficiency such as storage and removal of an optical connector and a multi-core single-fiber branch portion, and connection switching work.

[0005]

The present invention has the following features to attain the object mentioned above. That is, in the optical wiring board according to claim 1, a box body and the box body are arranged,
A plurality of trays in which the optical fiber cores derived from the optical fiber cable are internally connected to each other via the optical connection unit are stored in a stacked state, and a tray storage unit that supports the tray so that it can be freely taken out and put in the front-rear direction of the box, The connecting cord for connecting between the trays and the switching cord that is defined on the side of the tray storing portion and is switchably connected between the two trays stored in the tray storing portion are on substantially the same plane. And a connection switching unit for accommodating them in parallel with each other.

According to a second aspect of the present invention, there is provided an optical wiring board according to the first aspect, in which a plurality of cords for switching are gripped by the connection switching portion and arranged in parallel on one plane at predetermined intervals. Install a plurality of the above, and hold the switching cord in the cord fixture closest to the tray to which it is connected,
In addition, two different cords near the ends are gripped by the cord fixing tool to form a curved extra length portion between these two gripping portions, and a plurality of switching cords for connecting different sets of the trays are provided. Wiring in parallel to the extra length portion without intersecting each other was a means for solving the above-mentioned problems.

According to a third aspect of the present invention, there is provided an optical wiring board according to the first aspect, in which the cord for switching is gripped by the connection switching portion and arranged in parallel on a plane parallel to the stacking axis of the tray. By arranging a plurality of cord holders, gripping the switching cord on the cord support tool closest to the tray to which it is connected, and gripping two different locations near one end of the switching cord on one or two cord support tools. A curved extra length portion is formed between two insertion points, and a plurality of switching cords that connect different sets of the trays do not intersect each other to the extra length portion, and are parallel to the stacking axis of the tray. Wiring was used as a means for solving the above problems.

[0008]

According to the optical wiring board of the first aspect, the connection switching section defined by the tray storage section stores the switching codes in an organized manner to improve the workability of connection switching of the switching codes. improves.

According to the optical wiring board of the second aspect, since a plurality of switching cords are wired in parallel in the connection switching portion, a large number of switching cords can be efficiently arranged and an extra length is provided. The part acts as an extra work length when switching the connection, and the workability of switching the connection is improved.

According to the third aspect of the present invention, the plurality of switching cords can be efficiently arranged by wiring the plurality of switching cords in the connection switching portion in parallel with the stacking axis of the tray. , The wiring of the switching cord is easy to understand when switching the connection, and the workability of switching the connection is improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the optical distribution board of the present invention will be described below with reference to FIG.
From now on, referring to FIG. The optical wiring board is, as shown in FIG. 1, inside the box 1 fixedly installed at a predetermined position,
A branch portion 4a for arranging a bundle of optical fiber cords 3a (optical fiber core wires) from the lead-out portion of the optical fiber cable 2 rising from the lower part of the box 1 to the upper side, and the branch portion 4a.
The optical fiber cord 3a pulled out from the optical fiber cable 1 is connected to the connecting cord 3b via a fusion splicing reinforcement portion (not shown), and a fusion splicer tray 6 (tray) for accommodating the fusion splicing reinforcement portion is provided. The fusion unit tray storage unit T1 (tray storage unit) for accommodating a large number of stacked layers on the lower side of the box 1, and a large number of sheets pulled out from the respective fusion unit trays 6 provided on the left side inside the box 1. The connecting cords 3b are supported in a bundle in the vertical direction inside the box body 1, and a predetermined number of connecting cords 3b are connected from the bundle of connecting cords 3b.
The cord supporting portion 4 for branching the cord and the connecting cord 3b branched from the cord supporting portion 4 are internally provided with the optical adapter 5
(Optical connector. See FIG. 7) and branch connection tray storage for storing the branch connection tray 8 (tray) that is branched and connected via the multi-core single-core branch portion 7 (see FIG. 5) in a stacked state at the top of the box 1. A portion T2 (tray storage portion), a switching cord J laid on the right inner surface side of the box body 1 for switching jumpers between the branch connection trays 8 and an intermediate portion of the connection cord 3b are placed. Center code tray 9 to store
It has and. The multi-core / single-fiber branching unit 7 is obtained by cutting a multi-core optical fiber core wire and reinforcing the single-fiber branch.

A door (not shown) that can be opened and closed is attached to the front surface of the box body 1 (front side in FIG. 1). A plurality of back panels 10 are provided on the back wall of the box 1 from the center to the top of the box 1 to form a branch connection tray storage T2 by supporting a plurality of the branch connection trays 8 in a vertically stacked state. It is fixed. The back panel 1 formed on the lower back wall of the box 1 is smaller than the back panel 10.
Multiple 1 are fixed. The rear panel 11 constitutes a fusion-bonding tray storage unit T1 together with the plurality of fusion-bonding trays 6. The first trays 6 and 8 supported by the fusion tray tray storage portion T1 and the branch connection tray storage portion T2 are
Fusion part tray storage part T1 and branch connection tray storage part T2
They are stacked substantially continuously with a clearance between them. An inlet H1 of the optical fiber cable 2 is opened at the lower end of the side wall 12 on one side (left side in FIG. 1) of the box body 1, and the side wall 12 on the other side (right side in FIG. 1) is connected to the optical fiber cable 2. The introduction port H2 of the optical fiber bundle K formed by converging the optical fiber k is opened.

The branch connection tray storage portion T2 is separated into an upper layer portion T21 and a lower layer portion T22 via a clearance C. Between the branch connection tray 8 stored in the upper layer portion T21 and the branch connection tray 8 stored in the lower layer portion T22, a plurality of switching cords J are wired along the inner right wall surface of the box 1. It is switchably connected to the connector.

The branch portion 4a extends inside the side wall 12 on one side in the lower portion of the box 1. This branch 4a
The optical fiber cable 2 is clamped and fixed by a cord fixing portion 4h provided on the inner surface of the side wall 12.

Between the fusion portion tray storage portion T1 and the branch connection tray storage portion T2 and the other side wall 12 of the box body 1, the fusion portion, the branch connection tray storage portion T1, and the support material 4c described later are provided. A connection switching portion 4b which is defined as T2 and extends along the vertical direction of the box 1 is provided. The connection switching unit 4b is configured to store and bundle a bundle of a plurality of switching cords J in parallel with each other on a plane along the front-rear direction of the box 1 (the depth direction in the plane of FIG. 1).
Switching cord J stored in the connection switching portion 4b
Connects the pair of branch connection trays 8 housed in each of the upper layer portion T21 and the lower layer portion T22. This connection switching unit 4
In b, a support member 4c extending in the vertical direction along the side portions of the fusion unit tray storage unit T1 and the branch connection tray storage unit T2, and at a predetermined interval on the side wall 12 side of the support member 4c. A plurality of cord fixtures 4d are provided so as to project toward the side wall 12 side, and the cords for switching J are grasped and arranged in parallel on one plane along the front-rear direction of the box 1 (the depth direction in the plane of FIG. 1).
Are provided. The supporting planes of the switching cords J by the cord supporting members 4d are on the same plane. In addition,
In the connection switching unit 4b, the supporting plane of the switching cord J by each cord support 4d is the fusion unit tray storage unit T.
It may be inclined with respect to 1 and the branch connection tray storage portion T2. Along with this, the connection switching unit 4b may not be a complete rectangular parallelepiped region on the side portion of the box 1 of this embodiment.

The support member 4c is a plate member (partition wall) extending in the vertical direction of the box body 1, and is a fusion unit tray storage unit T.
A connection switching portion 4b is defined between the side 1 and the branch connection tray storage portion T2 and the side wall 12. The cord fixture 4d
2 and 4, a supporting plate 4e protruding from the supporting member 4c, a plurality of gripping elastic members 4f fixed on the supporting plate 4e on the same plane, and a supporting plate 4
e) and a radius maintaining portion w provided at the front end portion (lower left in FIG. 2, left side in FIG. 4) of e and fixed along the front-back direction of the box 1. The gripping elastic body 4f is made of sponge or the like, and has a slit 4s formed from the tip to the center.
The switching code J inserted in the is held.

As shown in FIGS. 3 (A) and 3 (B), the connection switching portion 4b connects the switching cord J to the branch connecting tray 8 of the upper layer portion T21 to which it is connected, which is the closest to the cord fixing tool 4d. The cord fixing tool 4 which is held near the tip of the cord and which is closest to the branch connection tray 8 of the lower layer portion T22 to which the cord is connected.
It is gripped at the rear end of d. The switching cord J is linearly wired between these two cord supports 4d. In this embodiment, the switching cord J is linearly wired in the connection switching unit 4b, but it is not always necessary to linearly wire the switching cords J as long as the switching cords J are kept parallel to each other. For example, a wiring method in which a gently curved portion is provided in the middle is also possible.

In the switching cord J, two different locations near the end connected to the lower branch connection tray 8 are held by a cord fixing tool 4d closest to the lower branch connection tray 8. A curved extra length portion J1 is formed between the two portions of the switching cord J gripped by the cord fixture 4d. At this time, one cord support 4d grips the plurality of switching cords J as a bundle of cords J2 corresponding to the plurality of branch connection trays 8 that are close to itself. The plurality of cord bundles J2 wired in the connection switching unit 4b are wired in parallel from the upper front end to the lower rear end of the connection switching unit 4b without intersecting each other.

The portion of the switching cord J between the branch connection tray 8 and the cord fixture 4d is wired via the front end of the support plate 4e, and the radius maintaining portion w keeps the bending radius above a prescribed value. ing. The radius maintaining portion w is formed in a shape in which the front end portion of the support plate 4e is curved and inverted toward the rear portion of the branch connection tray storage portion T2. Therefore, the bending radius of the switching cord J at the front end of the support plate 4e can always be ensured regardless of whether the branch connection tray 8 is stored in the branch connection tray storage portion T2 or when it is pulled out.

As shown in FIG. 1, a connection cord storage portion 4g for supporting the connection cord 3b is provided between the branch connection tray storage portion T2 on one side wall 12 of the box 1. The connecting cord housing 4g supports the connecting cord 3b by a plurality of cord fixing portions 4h protruding from the side wall 12. The cord fixing part 4h is
It has the same structure as the above-mentioned cord fixing tool 4d. In the connection cord storage portion 4g, the connection cords 3b connected to the branch connection trays 8 are held by the cord fixtures 4h closest to each of the branch connection trays 8. One side of the fusion tray tray storage section T1 (left side in FIG. 1)
The side portion is provided with an optical fiber cord storage portion 4i for wiring the optical fiber cord 3a branched from the optical fiber cable 2 at the branching portion 4a directly to the target fusion portion tray 6. Between the other side of the fusion tray tray storage T1 and the support 4c, there is provided a connection cord storage 4j for storing the end of the connection cord 3b connected to the fusion tray 6. Has been done.

The optical fiber cable 2 at the branching portion 4a
The optical fiber cord 3a derived from the above is branched in the optical fiber cord storage portion 4i and wired to the target fusion portion tray 6. On the other hand, the optical fiber k connected to these optical fiber cords 3a is introduced as an optical fiber bundle K into the box 1 from the introduction port H2, and is introduced into the connection switching portion 4b along the inner wall surface of the other side wall 12. It is introduced, branched at an appropriate position in the connection switching section 4b, and wired to the target branch connection tray 8.

The connecting cord 3b is wired between the connecting cord accommodating portions 4g and 4j via the center cord tray 9.

As shown in FIG. 5, at the left and right ends of the back panel 10 when the back panel 10 is installed in the box body 1, mounting members 14 extending substantially in the vertical direction of the back panel 10 are arranged facing each other and fixed. Has been done. A plurality of guide rods 15 for supporting the branch connection tray 8 are fixed to the mounting member 14 in a direction in which the guide rods 15 vertically project from the rear panel 10. These guide bars 15 are arranged on the left and right mounting members 14 so as to form a pair in which the upper and lower positions match each other on the rear panel 10. The guide bar 15 includes a straw-shaped outer guide 16 and the outer guide 16.
A rod-shaped inner guide 17 slidably fitted in the inner guide 17.
The inner guide 17 can be expanded and contracted by changing the amount of protrusion from the tip of the outer guide 16. At the tip of the inner guide 17, as shown in FIG.
The screw 18 is screwed on. A guide bar 15 is also provided on the rear panel 11 for the fusion tray 6 in the same manner as the rear panel 10.

As shown in FIG. 5, the branch connection tray 8 is mainly composed of a tray main body 21 having a side wall 20 over the entire circumference of an edge of a rectangular flat plate-like bottom plate 19. At the center of the bottom plate 19, there is provided a connector support band 23 formed by arranging a plurality of connector holders 22 for detachably supporting the optical adapter 5 in one direction.

The connector holder 22 is made of an elastic material such as plastic or rubber. As shown in FIGS. 5 and 7, two L-shaped projections 24 projecting from the bottom plate 19 are combined. Is configured.
A clearance 26 having an opening shape into which the flange 25 of the optical adapter 5 can be fitted is provided between the two protrusions 24 forming the same connector holder 22. An optical fiber core wire h1 branched from the optical fiber cord 3a and an optical fiber core wire h2 branched from the connection cord 3b are connected to the optical adapter 5 via plugs 34, respectively. At both ends of the connector support band 23 in the extending direction, end holders 22a that support the optical adapter 5 are provided between the connector holders 22 located at both ends of the row. The optical adapter 5 is an SC type optical adapter that has a zirconia ferrule positioning ring (not shown) built therein and constitutes an intermediate portion of a single-core SC type connector.

On both sides of the connector support band 23 of the bottom plate 19, the optical fiber cords 3a and the connecting cords 3b are mounted on the outer periphery to maintain the bending radius of the optical fiber cords 3a and the connecting cords 3b. A base reel 27 and a branch portion holder 28 for sandwiching the multi-core single-core branch portion 7 (fan-out portion) are attached. In the vicinity of the connector support band 23 of the bottom plate 19, a display plate P for displaying the storage lines in the branch connection tray 8 is mounted. In the vicinity of the branch portion holder 28 of the bottom plate 19, a fixing protrusion S for fixing the optical fiber cord 3a wired on the bottom plate 19 is provided in a protruding manner.

An entrance 30 for the optical fiber cord 3a and a connecting cord 3b is provided at the center of each side wall 20 on both short sides of the bottom plate 19. A first engaging piece 31 that engages with the outer guide 16 of the guide bar 15 is fixed to the inner side of the outer surface of the side wall 20 (the right rear side of the paper surface of FIG. 5), and the front side (the left front side of the paper surface of FIG. 5) is fixed. A second engagement piece 32 that engages with the inner guide 17 is fixed to the. As shown in FIG. 6, the second engagement piece 32 is placed on the screw 18 screwed to the tip of the inner guide 17 to remove the screw 1.
It is designed such that it is clamped and fixed between the inner guide 17 and the inner guide 17.

The fusion tray 6 accommodates a fusion splicing reinforcement portion and a splicing surplus length which are not shown. The storage structure of the fusion tray 6 for the fusion tray storage T1 is similar to that of the branch connection tray 8 for the branch connection tray storage T2. Further, an entrance (not shown) of the connecting cord 3b to the inside of the fusion tray 6 is opened at the front end (front side of FIG. 1) of the fusion tray 6.

In the optical distribution board, the optical fiber cable 2 is introduced into and fixed to the branch portion 4a from below the box 1, and the optical fiber cord is led out from the tip of the optical fiber cable 2 which is exposed at the branch portion 4a. A bundle of 3a is branched, and a predetermined number of these optical fiber cords 3a are wired to any one of the fusion trays 6. In the fusion splicing tray 6, the optical fiber cord 3a is connected to the splicing cord 3b through a fusion splicing reinforcement portion (not shown).
Connected to This connecting cord 3b passes through the upper side of the center cord tray 9 located between the fusion tray tray accommodating portion T1 and the branch connecting tray T2, and the connecting cord accommodating portion 4g on the side of the branch connecting tray accommodating portion T2. The respective ends are wired to the branch connection tray 8 via the. The left side wall 1 of the box 1 on the left side of the branch connection tray storage T2
In the connection cord storage portion 4g along the inner surface of the second connection cord 3, the connection cord 3b is temporarily fixed to the cord fixing portion 4h.

A plurality of switching cords J for jumper-connecting the branch connection trays 8 are laid in the connection switching section 4b on the right side of the branch connection tray storage section T2 on the inner surface of the right side wall 12 of the box 1. ing. The switching cord J is temporarily fixed along the side wall 12 of the box 1 by the cord fixing portion 4h for fixing the cord. In addition, a part of the switching cord J is used for a jumper outside the rack, and a branch connection tray storage portion T2
In some cases, it may be led out of the box 1 as an optical fiber cable from an opening (not shown) opened at the upper end of the box 1 via the cord support shelf 9a installed at the upper end of the box 1. In addition, the other part of the switching code J is the inlet H2.
May be derived from the outside of the box 1.

The connecting cord 3b wired to the branch connection tray 8 is drawn into the branch connection tray 8 through the entrance 30 on one side (left side in FIG. 5), and is appropriately inserted through the retaining portion by the fixture S. The optical fiber is bent in the direction of returning to the entrance / exit 30 while being bent in a straight line, and is single-branched into a plurality of optical fiber core wires 3j at the multicore single-fiber branch portion 7. Connection cord 3
The optical fiber core wire 3j, which is branched from b, has a surplus length secured by being wound around the reel 27, and the switching cord J is used in the optical adapter 5 supported by the connector holder 22. Is connected with the connector.

As shown in FIG. 7, the optical connection by the optical adapter 5 is made by connecting the connecting cord 3b to the optical fiber core wire 3j.
The connection cord 3b and the switching cord J are connected by terminating the connector of the switching cord J and providing the plug 34, and inserting the plug 34 from the tip of the optical adapter 5. The optical adapter 5 is fitted between the connector holders 22, and the multi-core single-core branch part 7 is sandwiched by the core wire branch part holder 28. In addition, the extra connection length of the switching cord J generated by these optical connections is curved by using two reels 27 arranged on the other side of the branch connection tray 8 so as to have a bending radius larger than the specified radius. With respect to these connection extra lengths, a pullout extra length that is pulled out when the branch connection tray 8 is pulled out from the rear panel 9 is secured in the vicinity of the entrance / exit 30.

After the optical adapter 5 and the multi-core single-core branch unit 7 are stored in the branch connection tray 8 and the extra length processing is completed,
The branch connection tray 8 is supported by the guide bar 15 and stored in a predetermined place in the box 1. At this time, in the branch connection tray 8, the first engaging piece 31 is attached to the outer guide 16 by the outer guide 1.
6 is slidably supported in the longitudinal direction of the second engagement piece 32.
Is fixed to the tip of the inner guide 17, but since the inner guide 17 is slidable with respect to the outer guide 16,
By pulling it out to the front side, it is stably pulled out while being supported by the guide rod 15.

The optical wiring board switches the connection between the branch connection trays 8 by replacing the wiring of the switching cord J to the branch connection tray 8 in the connection switching section 4b. In the switching work, when changing the cord fixing tool 4d that supports the switching cord J, the switching cord J is detached from the original cord supporting tool 4d, and the cord supporting tool 4d close to the target branch connection tray 8 is obtained. Support again. At this time, by using the extra length portion J1, the switching code J
Do not run out of length.

According to the optical distribution board of the present embodiment, since the connection of the switching cord J is switched in the connection switching section 4b, the connection switching work can be performed while avoiding interference with other optical fibers. Since the switching work efficiency is improved and the switching cords J in the connection switching unit 4b are arranged and wired in parallel with each other, more switching cords J can be accommodated.

A second embodiment of the present invention will be described below with reference to FIGS. 1, 8A, 8B and 9. The optical wiring board of the present embodiment differs from the optical wiring board of the first embodiment only in the connection switching unit designated by reference numeral 50 in the figure. In the figure, the same components as those in FIGS. 1 to 7 are designated by the same reference numerals to simplify the description.

As shown in FIG. 1, the connection switching portion 50 is provided between the fusion tray tray storage portion T1 and the branch connection tray storage portion T2 and the other side wall 12 of the box 1 by a support plate 54 described later. It is a defined area. This connection switching unit 5
As shown in FIGS. 8A and 8B, 0 is a branch connection tray 8 stored in the upper layer portion T21 of the branch connection tray storage portion T2 and a branch connection tray 8 stored in the lower layer portion T22.
A plurality of switching cords J for connecting and switching between and are arranged on a gripping material 51 (see FIG. 9), and a plurality of cord supporting members 52 for gripping the gripping members 51 (see FIG. 9) are arranged.
Is inserted into the nearest cord support 52 to the branch connection tray 8 to which it is connected, and two different locations near the ends thereof are inserted into one or two cord supports 52, so that the switching cord J A curved extra length portion 53 is formed between the two places inserted in the cord support 52, and the branch connection tray 8 is formed.
A plurality of switching cords J for connecting different sets are wired in parallel to the extra length portion 53 without crossing each other.

A plurality of cord supports 52 are provided on the side of the side wall 12 of a support plate 54 extending substantially entirely along the vertical direction of the box 1. On the front side of the support plate 54, a retractor 55 for retaining the switching cord J wired in the branch connection tray 8 is provided.

The cord support 52 is shown in FIG.
As shown in FIG. 9B and FIG. 9, a plurality of fixed rectangular plates in a plan view can be fixed to the support plate 54 and can be gripped by the gripping member 51 with the axis of the switching cord J parallel to the stacking axis of each tray 6, 8. The fastening fittings are arranged in series along the vertical direction of the box 1 at predetermined intervals to form a row. The grip member 51 is formed of an elastic body such as sponge. The cord holder 52 may be the cord fixture 4d described in the first embodiment as long as it can bundle and hold a plurality of switching cords J. In addition, a plurality of rows of cord supporting members 52 are arranged in parallel. Among the rows of the cord support tools 52, the cord support tools 52 are omitted from the upper part of the row close to the front side of the box 1. Here, the switching code J wired in the connection switching unit 50 may be parallel to the stacking axis of each tray 6 and 8,
If the lamination axis is horizontal, for example, the wiring is horizontal.

Cord support 52 located at the top of each row
The gripping material 51 of the switching cord J is wired in the branch connection tray 8 adjacent to the cord support 52 among the branch connection trays 8 stored in the upper layer portion T21 of the branch connection tray storage portion T2. A cord bundle 56 in which a plurality of cords are bundled is gripped. The switching cords J inserted into the same cord support 52 are the support plate 54 and the uppermost cord support 5
The cord bundle 56 is formed on a tray-shaped installation plate 57 that is installed between the two. The erection plates 57 are continuously arranged in the vertical direction of the support plate 54 at appropriate intervals. The cord bundle 56 inserted through the uppermost cord support 52 of the row is inserted through the cord support 52 vertically below the cord support 52 and extends along the vertical direction of the box 1. At this time, the cord bundle 56 is in a state of being suspended from the erection plate 57, but the load thereof is supported by the retractor 55. From the lower part of the cord bundle 56, the switching cord J branched at an appropriate position is connected to the branch connection tray storage portion T2.
It is wired to the branch connection tray 8 housed in the lower layer portion T22.

According to the optical distribution board of the present embodiment, the wiring of the switching cord J in the connection switching portion 50 is parallel to the vertical direction of the box 1, so that the wiring is easy to understand and the switching cord J
The work efficiency of connection switching is further improved.

Although the optical connectors and the fusion splicing reinforcing portions are mounted as optical connections as the trays 6 and 8 in the above embodiment, the contents of the optical components mounted on the trays are not limited to this. It wasn't what was done. This optical distribution board can also be applied to an optical termination rack for accommodating a plurality of cords with optical connectors and fan-out cords, a wiring board, a termination box, and a connection box.

[0043]

As described above, according to the optical distribution board of the first aspect, the box and the optical fiber cores arranged in the box and led out from the optical fiber cable are internally connected to the optical connection. The tray storage part that stores a plurality of trays connected through the stack in a stacked state and supports the tray so that it can be freely taken out and put in the front-back direction of the box, the connecting cord that connects between the plurality of trays, and the tray storage part And a connection switching unit that stores the switching cords that are defined on the side portions and that switchably connect between the two trays stored in the tray storage unit in parallel on the substantially same plane, Since the connection of the switching cord is switched in the connection switching unit, the switching cord can be easily handled, and the connection switching work can be prevented from interfering with other optical fibers (for example, entanglement with the switching cord). To be able to do, to improve the work efficiency of the changeover.

According to a second aspect of the present invention, there is provided the optical wiring board according to the first aspect of the present invention, in which a plurality of switching cords are gripped in the cord housing portion and arranged in parallel on one plane at predetermined intervals. A plurality of the cords, the switching cords are gripped by the cord fixture closest to the tray to which the cord is connected, and two different places near the ends of the cords are gripped by the cord fixtures, respectively. Since a curved extra length portion is formed between the plurality of switching cords that connect different sets of the trays and are wired in parallel to the extra length portion without crossing each other, the switching cord in the connection switching portion Are arranged and wired in parallel with each other, the switching work efficiency is further improved, and more switching cords can be dealt with.

According to a third aspect of the present invention, there is provided an optical wiring board according to the first aspect, in which the cord for switching is gripped by the connection switching portion and arranged in parallel on a plane parallel to the stacking axis of the tray. By arranging a plurality of cord holders, gripping the switching cord on the cord support tool closest to the tray to which it is connected, and gripping two different locations near one end of the switching cord on one or two cord support tools. A curved extra length portion is formed between two insertion points, and a plurality of switching cords that connect different sets of the trays do not intersect each other to the extra length portion, and are parallel to the stacking axis of the tray. By wiring, the wiring of the switching cord in the connection switching unit becomes parallel to the vertical direction of the box, so that the wiring is easy to understand and the work efficiency of connection switching of the switching cord is further improved.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of an optical wiring board according to the present invention.

FIG. 2 is a diagram showing a first embodiment of an optical wiring board of the present invention, and is a perspective view showing a cord fixture.

FIG. 3 is a diagram showing a first embodiment of the optical distribution board of the present invention, (A) is a front view showing the inside of a connection switching section, and (B) is a diagram showing the same.
FIG. 4 is a side view showing the inside of the connection switching unit.

FIG. 4 is a view showing a first embodiment of the optical wiring board of the present invention, and is a plane cross-sectional view showing the upper part of the box.

FIG. 5 is a diagram showing a first embodiment of the optical distribution board of the present invention, and is a perspective view showing the inside of the branch connection tray housing and the branch connection tray.

FIG. 6 is a view showing a first embodiment of the optical wiring board of the present invention, and is an enlarged perspective view showing the tip of the inner guide.

FIG. 7 is a diagram showing a first embodiment of the optical wiring board of the present invention, and is an enlarged plan view showing a connector holder.

8A and 8B are views showing a second embodiment of the optical distribution board of the present invention, FIG. 8A being a front view showing the inside of a connection switching unit, and FIG.
FIG. 4 is a side view showing the inside of the connection switching unit.

FIG. 9 is a view showing a second embodiment of the optical wiring board of the present invention, and is a plane cross-sectional view showing the upper part of the box.

[Explanation of symbols]

1 ... Box, 2 ... Optical fiber cable, 3a ... Optical fiber core wire (optical fiber cord), 3b ... Connection cord, 4b
... connection switching section, 4d ... cord fixing tool, 5 ... optical connector (optical adapter), 6 ... tray (fusion section tray), 7 ... multi-core single-core branch section, 8 ... tray (branch connection tray), 50 ...
Connection switching part, 52 ... Cord support, 53 ... Extra length part, k ...
Optical fiber, J ... switching cord, J1 ... extra length section, T1 ... tray storage section (fusion section tray storage section), T2 ... tray storage section (branch connection tray storage section).

Claims (3)

[Claims] 1. An optical fiber cable (2) or an optical wiring board for an optical fiber cord, wherein a box (1) and an optical fiber core wire (3a) arranged in the box and led out from the optical fiber cable are provided inside. In the tray storage unit (T1, T2) that stores a plurality of trays (6, 8) connected through the optical connection unit in a stacked state and supports them in the front-back direction of the box body, A connecting cord (3b) for connecting between the trays and a switching cord (J) defined on the side of the tray storage portion and for switching between the two trays stored in the tray storage portion are omitted. Connection switching unit (4 that stores in parallel with each other on the same plane)
b) An optical distribution board comprising: 2. The optical wiring board according to claim 1, wherein a plurality of cord fixing tools (4d) for gripping a plurality of switching cords and arranging them in parallel on one plane are installed at the connection switching portion at predetermined intervals, The switching cord is gripped by a cord fixture closest to the tray to which the cord is connected, and two different places near the ends are gripped by the cord fixture, respectively, and curved between these two gripping places. An optical wiring board, wherein an extra length portion (J1) is formed, and a plurality of switching cords for connecting different sets of the trays are wired in parallel to the extra length portion without crossing each other. 3. The optical distribution board according to claim 1, wherein a plurality of cord supports (52) are arranged in the connection switching section and are arranged in parallel on a plane parallel to the stacking axis of the tray. The switching cord is gripped by the cord support tool closest to the tray to which it is connected, and one or two cord support tools at two different locations near the end thereof are gripped by one of these two insertion locations. Extra length (5
3) is formed, and a plurality of switching cords for connecting different sets of the trays are wired so as not to intersect each other up to the extra length portion and in parallel with the stacking axis line of the trays. .