JP3148609B2 - Optical distribution frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical distribution board whose connection can be switched by a jumper 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 which terminates a large number of optical fibers to form a group is generally used. In some of these optical distribution boards, connection between the connector trays can be switched using a large number of jumper cords.

[0003]

In view of the fact that optical cables tend to be multi-core in response to an increase in the amount of transmitted information, the optical distribution board is particularly suitable for a larger number of optical connection sections and optical connection sections. It has become important to accommodate the extra connection length compactly. In addition, since the number of optical connection points in the optical distribution board becomes enormous, it is desirable to develop an optical distribution board that can increase the storage efficiency of jumper cords and that can perform connection and connection switching work quickly. It is rare.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and can store a large number of jumper cords in an orderly manner. It is another object of the present invention to provide an optical distribution board that can easily perform connection switching.

[0005]

The present invention has the following features to attain the object mentioned above. That is, the optical wiring board according to the first aspect has a jumper cord storage frame having a U-shaped horizontal cross section in which the front surface is open and the inside is an extra length storage space for the jumper code. A cord supporting portion for clamping one end side and the other end side of the jumper cord in an aligned state in a plane along the side wall is provided, and each cord supporting section has a plurality of jumper cord gripping parts in the front-rear direction. In addition, it is composed of a plurality of cord clamps provided in multiple stages at intervals in the vertical direction, and both end portions of the jumper cord are grasped by the jumper cord grasping portion at the front end of the nearest stage cord clamp, and the extra length of the jumper cord is When it is extended downward and extended downward, it is sequentially clamped by the lower cord clamp, and the position of the jumper cord gripping portion to be clamped is lower. That are offset sequentially rear side as it goes to Dokuranpu was solutions of the problems.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1A and 1B show the entire configuration of an optical distribution board according to an embodiment, wherein FIG. 1A is a front view, FIG. 1B is a view taken along the line AA in FIG. It is an arrow view. The optical distribution board of this embodiment has three frames 1, 2,.
3 The three frames are a track-side tray storage frame 1 on the left side as viewed from the front, and a jumper cord storage frame 3 in the center.
And the right device-side tray storage frame 2. These frames constitute a single box as a whole, and an open / close door (not shown) is provided on the front surface of the box.

[0007] A connector tray storage section 11 is provided above the inside of the track-side tray storage frame 1, and a fusion section tray storage section 13 is provided below the connector tray storage section. A large number of connector trays 30 and a large number of fusion section trays 40 are supported in the respective tray storage sections 11 and 13 in a stacked state so that they can be individually put in and out of the front and rear direction. The connector tray 31 and the fusion tray 40 are slidably supported in the front-rear direction by the back panel of the track side tray housing frame 1.

The fusion tray 40 is for fusion-splicing the optical fiber cord 103 derived from the optical fiber cable 101 on the line side to the connection cord 104, and for storing the extra connection length. Optical fiber cable 101
The wiring from to the fusion part tray 40 is performed as follows.

First, the optical fiber cable 101 on the line side
Strip off the sheath at the end of the working length (about 2 to 2.5 m) and remove the tension member from the sheath end to an appropriate length (about 15 m).
(0 mm) and cover the cut end with a protective cap. In the case of a cable reinforced with Kevlar, cut Kevlar according to the tension member. In the case of a slot type cable, the slot is formed with a groove by a cutter and stripped off.

[0010] Next, the optical fiber cores drawn from each tube of the optical fiber cable 101 are grouped for each unit, which is covered with a protective silicon tube with a distinguishing color, and the end of the silicon tube is optical fiber. The optical fiber cord 103 is formed by fitting into the end of each tube of the cable 101. In the case of the slot type cable, after the optical fiber cores 113 are grouped for each unit with a silicon tube, the end of the silicon tube is fixed with a vinyl tape, and thus the optical fiber cord 1 is fixed.
03 is formed.

Next, the optical fiber cable 101 is fixed to the line side tray housing frame 1 with the cable clamp 20.
After the optical fiber cable 101 is clamped, the tension member is fixed by the tension member clamp 21. In the case of a cable reinforced with Kevlar, the Kevlar is twisted and crimped to the crimp terminal, and the crimp terminal and the tension member are fixed simultaneously.

[0012] Then, the optical fiber cord 103 after the cable terminal processing is wired to the fusion part tray 40. In this case, first, with the fusion part tray 40 pulled out to the front, the introduced optical fiber cord 103 is fixed with a cord clamp so that the optical fiber core wire can secure the minimum radius. Then, the coating (silicon tube) on the distal end side is peeled off at a predetermined position from the clamp portion, the extra length of the optical fiber core wire is secured, and the extra length portion is locked on the fusion tray 40. This is the wiring from the optical fiber cable 101 to the fusion tray 40.

On the other hand, the connector tray 31 is used to connect the connection cord 104 to one end of the jumper cord 106 with a connector on the upper surface and to store the extra connection length. The connection cord 104 is a terminated product having an SC-type connector plug at one end, and is wired to the connector tray 31 as follows. First, the connection cord 10
The one with the connector plug of No. 4 is introduced into the upper surface of the connector tray 31 that has been pulled out to the front in advance. Then, an extra length is secured on the connector tray 31, a connector plug is connected to one end of a connection adapter (not shown), and this is stored in a connector holder on the connector tray 31. 2 hearts (4
In the case of a single-core branch cord, the connection cord 104 composed of a two-core single-core branch cord is pulled onto the connector tray 31 and the dam portion is fixed to the dam fixing holder to secure an extra length. After that, connect the connector plug to the connection adapter,
Store in the connector holder.

A center code tray 14 for placing an intermediate length of the connection cord 104 is disposed between the connector tray storage section 11 and the fusion section tray storage section 13 disposed above and below. ing. Further, a large number of connection cords 104 are provided on the left side in the trackside tray storage frame 1.
Are provided along the side wall 1b, and a predetermined number of connection cords 104 are branched from the bundle of connection cords 104. Then, the connecting cord 104 extended from the connector tray 31 is planarly held by the cord supporting portion 6 and extends downward, and the lower end portion passes through the center cord tray 14 and passes through the fusion portion tray 40. Is introduced to the upper surface of the fusion section tray 40, and is fusion-spliced to the optical fiber cord 103 introduced from the opposite side. This connection is performed as follows.

First, the connection cord 104 introduced on the fusion part tray 40 is fixed by a cord clamp, and the cord covering on the tip side from the clamp part is peeled off, and an optical fiber core is led out. Next, the optical fiber core wire pulled out from the connection cord 104 is locked while securing an extra length, and fused with the optical fiber core wire of the optical fiber cord 103 introduced from the opposite side of the fusion part tray 40. Connecting. Since the fusion portion is reinforced by the fusion portion reinforcing sleeve, the fusion portion becomes cylindrical, and is fitted into the temporary fixing fixture on the tray 40 to fix the fusion joint portion.

A connector tray storage section 12 is also provided above the inside of the apparatus-side tray storage frame 2 disposed on the opposite side.
A large number of connector trays 32 are individually supported in a stacked state so as to be freely put in and out in the front-rear direction. Connector tray 32
Are slidably supported in the front-rear direction by the back panel of the apparatus-side tray storage frame 2. Excess length storage sections 15 and 16 are provided below the apparatus-side tray storage frame 2.

The right side wall 2 in the apparatus-side tray storage frame 2
b, a number of optical fiber cords 105 extended from the optical fiber cord 105 are vertically bundled and held along the side wall 2b.
Is provided with a cord support 9 for branching a predetermined number of optical fiber cords 105 from the bundle. The cord support 9 is the same as the cord support 6 described above.

Also, the center jumper cord storage frame 3
Has a U-shaped horizontal cross section with an open front surface, and the inside is a surplus storage portion 3a of the jumper cord 106. Further, jumper cord supporting portions 7 and 8 are provided on the inner surfaces of the opposing side walls 3b and 3b, respectively.

The cord supporting portions 6, 7, 8, and 9 have substantially the same structure, and a representative example thereof will be described with reference to FIGS. 2 and 1C taking the cord supporting portion 8 as an example. The cord support portion 8 includes the cord clamps 1 provided in multiple stages in the vertical direction.
7. The cord clamp 17 of each stage is
As shown in FIG. 2, a band plate 17a fixed to the side wall 3b, a large number of support plates 17b projecting from the band plate 17a in the front-rear direction at intervals, and a gripping elastic body fixed between the support plates 17b ( For example, a sponge 17c is formed, and a slit (optical cord gripping portion) 17d vertically penetrating the elastic body 17c for gripping is formed. And each slit 17
By inserting the jumper cord 106 into d, the jumper cord 106 can be held in a vertically extended state. In this case, since a plurality of slits 17d are secured in the front-rear direction by the number of the elastic bodies 17c for gripping,
By sequentially inserting a bundle of jumper cords 106 into the slits 17d of the cord clamps 17 of each stage, the jumper cords 106 are held flat along the side wall 3b.

Here, as shown in FIGS. 1 (b) and 1 (c), both ends of the jumper cord 106 extended from the connector trays 31 and 32 are connected to the front end of the nearest cord clamp 17 first. , And the intermediate extra length is extended downward. Then, when it is extended downward, it is sequentially shifted one by one into the slit 17 d on the rear end side as it goes to the lower cord clamp 17. As a result, the entire jumper cords 106 are held two-dimensionally in an obliquely parallel state.
In this case, since the overall length of the jumper cord 106 is set to be substantially constant, the jumper cord 106 connected to the upper connector trays 31 and 32 is located higher on the back side of the jumper cord storage frame 3 and lower Connector tray 3
The jumper cords 106 connected to the jumper cords 1 and 32 are located on the near side of the jumper cord storage frame 3 and below. Therefore, just looking from the front of the jumper cord storage frame 3,
All jumper cords 106 can be observed, and jumper cords 106 to be switched and connected can be easily found.

Further, the jumper cords 106 between the connector trays 31, 32 and the cord support portions 7, 8 are distributed by the distribution portions 19a at the front ends of both side walls 3b, 3b of the jumper cord storage frame 3. Sorting unit 1
9a, the front end of the side wall 3b is connected to the connector tray storage portion 11,
It is curved in a semicircular shape toward the 12 side, and has a hook 19b for hooking a cord on the tip end surface. Therefore, the bending radius of the jumper cord 106 at the front end of the side walls 3b, 3b can be constantly secured regardless of whether the connector trays 31, 32 are stored in or pulled out of the connector tray storage sections 11, 12.

As described above, the jumper cord 1 pulled out from each of the line-side and device-side connector trays 31 and 32 is used.
06, first, after being clamped in the slit 17d at the front end of the nearest cord clamp 17, the wiring is basically moved toward the back (toward the rear) as the cord clamp 17 to be clamped is lowered. To go. The delivery from the line-side cord support section 7 to the apparatus-side cord support section 8 is as follows.
It is performed in order from the back in parallel with the back wall of the frame 3 as much as possible.

Depending on the positional relationship between the connector trays 31 and 32 to be connected, the wiring may be shortened when wired in a usual manner. In that case, proceed as follows. That is, as shown in FIG. 4, before passing, the cord clamps 17 on one side are crossed as indicated by the arrow (d). Further, as shown in FIG. 3, at the crossing portion between the line-side cord support portion 7 and the device-side cord support portion 8, the wire may be passed obliquely as indicated by an arrow (b). Crossing should not be made as in the case of ()). Also, as shown by the arrow (a), it is passed between the slits 17d, 17d as close as possible. By doing so, the hand can easily enter during the switching work of the jumper cord 106, and the workability is improved.

As shown in FIG. 4, one end of the jumper cord 106 accommodated in the jumper cord accommodation frame 3 is connected to a single-core branched cord from the connection cord 104 on the line side connector tray 31. They are interconnected via a connector (not shown) held by the connector holder 37. The other end of the jumper cord 106 is connected to the optical fiber cord 105 on the connector tray 32 on the device side.
Are connected to each other via a connector held by the connector holder 37. Thereby, the pair of the connector tray 31 accommodated in the track side tray accommodating frame 11 and the connector tray 32 accommodated in the apparatus side tray accommodating section 12 are switchably connected by the jumper cord 106.

In this optical distribution board, the connection between the connector trays 31 and 32 can be switched by replacing the wiring of the jumper cords 106 accommodated in the jumper cord storage frame 3 to the connector trays 31 and 32.
When the position of the cord clamp 17 holding the jumper cord 106 is changed in the switching operation, the jumper cord is detached from the original slit 17d and reinserted into the slit 17d near the target connector trays 31, 32. At this time, by using the extra length storage portion 3a in the jumper code storage frame 3, the jumper code 106 can be used.
So that the length is not short.

According to the optical distribution board of this embodiment, since the exclusive frame 3 for storing the jumper cords 106 is provided, the connection switching operation of a large number of jumper cords 106 can be performed while avoiding interference with other optical fibers. However, it can be performed efficiently, and the work efficiency of switching is improved. In addition, since the jumper cords 106 are orderly held on the jumper cord storage frame 3, the jumper cords 106 corresponding to the connection switching can be easily found, and the work efficiency is good.

[0027]

As described above, according to the optical wiring board of the first aspect, a jumper cord storage frame having a U-shaped horizontal cross section is provided, and one end of a large number of jumper cords is provided on the inner surfaces of the opposing side walls. A cord support portion is provided for clamping the side and the other end side in a plane along the side wall in an aligned state. Each cord support portion has a plurality of jumper cord grippers in the front-rear direction and is vertically spaced. It is composed of a plurality of cord clamps provided in multiple stages, and both ends of the jumper cord are grasped by the jumper cord grasping portion at the front end of the cord clamp of the nearest stage, and the intermediate extra length of the jumper cord extends downward. And when it is extended downward, it is sequentially clamped by the lower cord clamp, and the position of the jumper cord gripper to be clamped goes to the lower cord clamp. Since the jumper cords are sequentially shifted to the rear end side, a large number of jumper cords can be stored in an easily recognizable state, handling of jumper cords becomes easy, and connection switching work can be performed with interference with other optical fibers (eg, jumper cords) (Entanglement with the code), and the switching work efficiency is improved.

[Brief description of the drawings]

FIGS. 1A and 1B are overall configuration diagrams of an embodiment of the present invention, in which FIG. 1A is a front view, FIG. 1B is a view taken along the line AA in FIG. 1A, and FIG. FIG.

FIG. 2 is an enlarged perspective view of a cord support in the embodiment.

FIG. 3 is a plan view of the jumper cord storage frame according to the embodiment.

FIG. 4 is a view taken in the direction of arrows CC in FIG. 3;

FIG. 5 is a plan view showing an example of connection between the line-side connector tray and the device-side connector tray by a jumper cord in the embodiment.

[Explanation of symbols]

3. Jumper cord storage frame, 3a Extra storage section, 3b
... side wall, 7, 8 ... cord support part, 17 ... cord clamp, 17d ... slit (optical cord gripping part), 106 ... jumper cord

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hideo Kikuchi 1440 Mutsuzaki, Sakura City, Chiba Prefecture Fujikura Co., Ltd. Inside the Sakura Plant (56) References Jikku Sho 61-46485 (JP, Y2) Special Table Hei 5-503162 (JP, A) U.S. Patent No. 4962989 (US, A) U.S. Patent No. 4,484,954 (US, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G02B 6/00 G02B 6/38 H04Q 1/14 H05K 7/00

Claims (1)

(57) [Claims] A front surface is open and a jumper cord (1) is provided inside.
06) having a jumper cord storage frame (3) having a U-shaped horizontal cross-section, which is a surplus storage space (3a). One end of a large number of jumper cords is provided on the inner surfaces of the opposing side walls (3b, 3b). Cord supporting portions (7, 8) are provided for clamping the other end side in a plane along the side wall in an aligned state, and each of the cord supporting portions has a plurality of jumper cord gripping portions (17d) in the front-rear direction. And a plurality of cord clamps 17 provided in multiple stages at intervals in the vertical direction,
When both ends of the jumper cord are gripped by the jumper cord gripper at the front end of the nearest cord clamp, and the intermediate extra length of the jumper cord is extended downward, and then extended downward, the lower cord clamps are successively arranged. Wherein the position of the jumper cord gripping portion to be clamped is sequentially shifted to the rear end side toward the lower code clamp.