JP3173980B2 - 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 fiber cable or an optical distribution board for optical fiber cords.

[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 these optical distribution boards, a connector connection portion for branch connection of an optical fiber, a multi-fiber single-fiber branch portion, an optical cord for a jumper (hereinafter, referred to as a jumper cord), and an extra length of the optical cord are compactly stored. Trays are stacked at high density in multiple stages.

[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 desired to develop an optical distribution board that can quickly perform optical connection work, housing and removal work of optical connection parts, or connection switching work. ing.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and is intended to arrange an optical connector, a fusion splicing part, a multi-fiber single-fiber branch part, a connection extra length, etc. into a plurality of trays and compactly store them. It is another object of the present invention to provide an optical wiring board which can improve the working efficiency of storing and taking out an optical connector and a multi-fiber single-fiber branching section, 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 the first aspect, a plurality of trays for connecting the optical fiber core wire derived from the optical fiber cable on one side to one end of the jumper cord on the upper surface with a connector are stored in a stacked state, and the trays are stored. A first tray housing frame that supports the optical fiber cable led out from the optical fiber cable on the other side and a plurality of trays that connect the other end of the jumper cord to the connector on the upper surface in a stacked state. A second tray storage frame for storing and supporting the tray so that the tray can be freely taken in and out in the front-rear direction;
Disposed between the tray accommodating rack member and second tray storage rack body, inside a jumper cord storage rack body that is a slack storage space jumper cord, jumper cord storage rack body
On both sides of the opposite side of the
And the other end are aligned and clamped, and jumper
The middle part of the cable is open at the front of the jumper cord storage frame.
And pull all the jumper cords diagonally in parallel.
The provision of a cord clamp for holding the bent state is provided as a means for solving the above problem.

[0006]

[0007]

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 the optical wiring board of the present embodiment, wherein FIG. 1A is a front view, and FIG.
It is a schematic sectional drawing of an arrow view part. This optical distribution board is composed of three unitized frames 1, 2, 3 arranged side by side and a height adjustment box 4 on which they are mounted. The three frames are a track-side tray storage frame (first tray storage frame) 1 on the left as viewed from the front, a jumper cord storage frame 3 in the center, and a right device-side tray storage frame (first tray storage frame). 2 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.

[0008] Above the inside of the track side tray storage frame 1,
A connector tray storage section 11 is provided, and a fusion section tray storage section 13 is provided below the connector tray storage section 11. A large number of connector trays 31 and a large number of fusion spliced trays 40 are supported in the respective tray storage sections 11 and 13 in a stacked state so that they can be individually inserted and removed in the front-rear direction. The connector tray 31 and the fusion tray 40 are slidably supported in the front-rear direction by the back panel 1a of the track side tray storage frame 1.

The fusion tray 40 is provided with optical fiber cores 113 derived from the optical fiber cable 101 on the line side.
Is fusion-spliced to each optical fiber core 114 of the connection cord 104, and the extra length of the connection is stored. The cord clamp 41 and the optical fiber cores 113, 114 are provided on the tray surface. And a temporary fixing fixture 45 for temporarily fixing the fusion spliced portions of the optical fiber cores 113 and 114. The wiring from the optical fiber cable 101 to the fusion 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.

Next, the optical fiber cores 113 pulled out 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 illuminated. The optical fiber cord 103 is formed by fitting into each tube end of the fiber cable 101. In the case of the slot type cable, the optical fiber core 1 is made of silicon tube.
After the units 13 are assembled for each unit, the end of the silicon tube is fixed with a vinyl tape, thereby forming the optical fiber cord 103.

Next, the optical fiber cable 101 is fixed to the line side tray storage frame 1 with a 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.

[0013] Then, after the cable termination processing, the optical fiber core 113 coded by the silicon tube.
Is wired to the fusion tray 40. In this case, first, the optical fiber cord 103 introduced is fixed with the cord clamp 41 so that the optical fiber core wire 113 can secure the minimum radius with the fusion part tray 40 pulled out to the front. Then, the coating (silicon tube) on the distal end side is peeled off at a predetermined position from the clamp portion, an extra length of the optical fiber core 113 is secured, and the extra length portion is locked by the projection 42.

On the other hand, as shown in FIG. 3, the connector tray 31 has an optical fiber core 1 pulled out from a connection cord (completed product having an SC type connector plug at one end) 104.
14 is connected to an optical fiber core drawn out from one end of a jumper cord 106 (see FIG. 1 or 9) by a connector, and accommodates the extra connection length.
An upright edge 31a is provided substantially all around. Connector tray 3
A plurality of connector holders 37 for detachably supporting the optical connector are arranged in the center of the upper surface of the optical disk 1. On both sides of the connector holder 37, the connection cord 104 and the jumper cord 106 are wound around the outer periphery, thereby maintaining the bending radius of the reels 33 and 34, and the branching portion from the multi-core cord to the single-core cord ( And a branch portion holder 36 for supporting the fan-out portion). In addition, connector tray 3
On the left and right of 1, an inlet 38 for the connection cord 104 and an inlet 39 for the jumper cord 106 are provided.

[0015] Cord 10 for connection to connector tray 31
The wiring of No. 4 is performed as follows. First, a connection cord 10 of a finished product having a connector plug (not shown) at one end.
4 and the connector cord 3 with the connector plug of the connecting cord 104 is pulled out to the front in advance.
It is introduced into the upper surface of 1 through an inlet 38 on the side. 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 the connector holder 37. In the case of a two-core (four-core) single-core branch cord, the connecting cord 104 composed of the 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, the connector plug is connected to the connection adapter, and the connector holder 37 is connected.
To be stored.

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 which are disposed vertically. ing.

On the left side of the rail-side tray storage frame 1, a number of connecting cords 104 are vertically bundled and held along the side wall 1b.
Is provided with a cord supporting portion 6 for branching a predetermined number of connection cords 104 from the bundle. Cord support 6
As shown in FIGS. 4A and 4B, a plurality of cord clamps 17 are provided vertically. As shown in FIG. 5, each of the cord clamps 17 includes a band plate 17a supported on the side wall 1b, a large number of support plates 17b projecting from the band plate 17a in the front-rear direction at intervals, and a support plate 17b. The gripping elastic body (for example, a sponge) 17c fixed between the slits 17c. The slit 17d penetrating vertically is formed in the gripping elastic body 17c, and the connection cord 104 is inserted into each slit 17d. The connection cord 104 can be held in a state of extending in the vertical direction. In this case, a plurality of slits 17d are provided in the front-rear direction by the number of the elastic members 17c for gripping.
By inserting the bundle of Nos. 4, the connection cord 104 is held in a plane along the side wall 1 b of the trackside tray storage frame 1.

Here, as shown in FIG. 4B, the connecting cord 104 extended from the connector tray 31 is used.
Are inserted into the slit 17d at the front end of the nearest cord clamp 17 first, and are sequentially shifted one by one into the slit 17d at the rear end side toward the lower code clamp 17. As a result, the entire connection cord 104 is held in a state of being obliquely arranged in parallel. The lower end of the connection cord 104 is guided to the opposite side of the fusion tray 40 through the center code tray 14 and is introduced to the upper surface of the fusion tray 40 as shown in FIG. , And the optical fiber cord 103 introduced from the opposite side. This connection is performed as follows.

First, the connecting cord 104 introduced onto the fusion part tray 40 is fixed by the cord clamp 41, the cord coating on the tip side from the clamp part is peeled off, and the optical fiber core wire 114 is led out. Next, the connection cord 104
Of the optical fiber cord 103 of the optical fiber cord 103 introduced from the opposite side of the fusion part tray 40 while securing the extra length while securing the extra length.
13 and fusion-spliced. Since the fusion portion is reinforced by the fusion portion reinforcing sleeve, the fusion portion becomes cylindrical, and these are fitted into temporary fixing fixtures arranged in the center of the fusion portion tray 40 to fix the fusion joint portion.

On the other hand, 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
Is slidably supported in the front-rear direction by the back panel 2a of the apparatus-side tray storage frame 2. The structure of the connector tray 32 is almost the same as the structure of the connector tray 31 described above, and the description thereof will be omitted. Also,
Below the device-side tray storage frame 2, extra length storage sections 15, 1
6 are provided.

As shown in FIG. 8, the optical fiber cord 1 is also provided inside the right side wall 2b of the apparatus-side tray storage frame 2.
05 optical fiber cord 105
Are held in a bundle vertically and are held along the side wall 2b, and a cord supporting portion 9 composed of a multi-stage cord clamp 17 for branching a predetermined number of optical fiber cords 105 from the bundle of optical fiber cords 105 is provided. Is provided. As shown in FIG. 8B, the optical fiber cords 105 are also obliquely held in parallel with the cord support 9 in the same manner as the line side.

As shown in FIGS. 6 and 7, an optical fiber cable fixing bracket 51 is provided at an upper portion of the apparatus-side tray storage frame 2 at an introduction portion of an optical fiber cable 102 connected to the apparatus. . The fixing bracket 51 includes a plurality of support plates 51b protruding from a rear band plate 51a, and fixes an optical fiber cable 102 with an insulator lock 51c.

Also, the center jumper cord storage frame 3
As shown in FIG. 1 (b), has a U-shape in horizontal section, has an open front surface, and has an extra length storage space 3a for the jumper cord 106 inside. And the opposing side walls 3
Jumper cord supporting portions (cord clamps) 7 and 8 are provided on the inner surfaces of b and 3b, respectively. These cord supports 7 and 8 are also the same as the above-described cord support 6, and include multi-stage cord clamps 17. Therefore,
A large number of jumper cords 106 can be wired and housed in parallel in a plane along the front-rear direction (depth direction) in a bundled state.

The jumper cords 106 between the connector trays 31 and 32 and the cord supporting parts 7 and 8 are arranged at the front end of the side walls 3b and 3b of the jumper cord storage frame 3.
9a. Distributor 19a
The front end of the side wall 3b is connected to the connector tray storages 11, 12
It is formed in a semicircular arc shape toward the side, and has a hook 19b for hooking a cord on the distal end surface. Therefore,
Regardless of whether the connector trays 31, 32 are stored in or pulled out of the connector tray storage sections 11, 12, the bending radius of the jumper cord 106 at the front ends of the side walls 3b, 3b can be always stably secured.

Then, as shown in FIG. 9, the connector plug at one end of the jumper cord 106 stored in the jumper cord storage frame 3 is branched from the connection cord 104 on the line-side connector tray 31 in a single-core manner. The connector is connected to the cord via a connection adapter, and the connector at the other end of the jumper cord 106 is connected to the optical fiber cord 105 via the connection adapter on the device-side connector tray 32, whereby the jumper cord 106 The pair of the cord 104 on the connector tray 31 accommodated in the track-side tray housing 11 and the code 105 on the connector tray 32 housed in the apparatus-side tray housing 12 are switchably connected. .

After connecting the connector,
It is housed in the connector holder 37. The connection cords 104 and the optical fiber cords 105 wired to the connector trays 31 and 32 are drawn into the connector trays 31 and 32 through the introduction port 38, and then are branched into single fibers while being appropriately curved. Branched optical fiber 11
4 and 115 are wound around the reel 33 so that the extra length is ensured, and the jumper cord 106 is secured by an optical connector (not shown) supported by the connector holder 37.
It is connected to the. Similarly, the excess connection length of the jumper cord 106 generated by these optical connections is subjected to a bending process with a bending radius greater than a specified value using the other reels 34 on the connector trays 31 and 32.

The connection work is performed on the connector tray 3
1 and 32, a jumper code 1 is provided by an optical connector.
06 is connected to the mating connector. After the connection is completed, the connector trays 31 and 32 may be slid to a predetermined storage position.

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.
In the switching operation, the jumper code 10
When changing the position of the cord clamp 17 holding the jumper 6, the jumper cord is detached from the original slit 17d,
Slit 17d close to target connector tray 31, 32
Re-insert in. At this time, by using the extra length of the jumper cord in the jumper cord storage frame 3, the length of the jumper cord 106 is prevented from becoming insufficient.

According to the optical wiring board of the present 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. Further, the track side tray storage frame 1, the apparatus side tray storage frame 2, and the jumper cord storage frame 3 are each unitized, so that assembly can be simplified.

[0030]

As described above, according to the optical wiring board of the first aspect, a jumper cord having a horizontal U-shaped cross section is provided between two tray storage frames arranged side by side at an interval. The storage frame is arranged and the jumper cord wiring part where the wiring is crowded is housed in an independent frame, so it is possible to store a large number of jumper codes in an organized state, making it easier to handle jumper codes In addition, the connection switching operation can be performed while avoiding interference with other optical fibers (for example, entanglement with a jumper cord), and the switching operation efficiency is improved.

Further, a cord supporting portion for clamping one end and the other end of the jumper cord in an aligned state is provided on the inner surfaces of the opposite side walls of the jumper cord storage frame, so that a large number of jumper cords are accommodated while being arranged. It is possible to improve the efficiency of the operation and facilitate the subsequent switching operation.

[Brief description of the drawings]

FIGS. 1A and 1B are overall configuration diagrams of an embodiment of the present invention, wherein FIG. 1A is a front view, and FIG. 1B is a schematic cross-sectional view taken along the line AA of FIG.

FIG. 2 is a plan view of a fusion tray according to the embodiment.

FIG. 3 is a plan view of the connector tray in the embodiment.

4A and 4B are configuration diagrams of a track-side tray storage frame in the embodiment, where FIG. 4A is a front view, and FIG. 4B is a view taken along the line BB in FIG.

FIG. 5 is a detailed perspective view of the cord support shown in FIG. 4 (b).

FIG. 6 is a front view showing the upper structure of the apparatus-side tray storage frame in the embodiment.

FIG. 7 is a detailed perspective view of a portion C in FIG. 6;

8A and 8B are configuration diagrams of an apparatus-side tray storage frame in the embodiment, where FIG. 8A is a front view, and FIG. 8B is a view taken along the line DD in FIG.

FIG. 9 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]

1. Track-side tray storage frame (first tray storage frame)
2. Device-side tray storage frame (second tray storage frame)
3. Jumper cord storage frame, 3a extra storage space, 3
b ... side wall, 7,8 ... cord support (cord clamp),
11, 12: Connector tray storage section, 31, 32: Connector tray, 101, 102: Optical fiber cable, 1
03, 105: Optical fiber cord, 104: Connection cord, 106: Jumper cord

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hideo Kikuchi 1440 Mutsuzaki, Sakura City, Chiba Prefecture Fujikura Co., Ltd. Sakura Plant (56) References Table 5-503162 (JP, A) (Int.Cl. ⁷ , DB name) G02B 6/00

Claims (1)

(57) [Claims] 1. An optical fiber cable (101) on one side
An optical fiber core (113) derived from the optical fiber cable (102) and an optical fiber core (105) derived from the optical fiber cable (102) on the other side are switchably connected by a jumper cord (106), A plurality of trays (31) for connecting an optical fiber core wire derived from one side of the optical fiber cable to one end of a jumper cord and connecting the connector on the upper surface are stored in a stacked state, and the trays are supported so that the trays can be freely inserted and removed in the front-rear direction. A tray storage frame (1) and a plurality of trays (32) for connecting an optical fiber core wire derived from the optical fiber cable on the other side to the other end of the jumper cord with a connector on the upper surface, and A second tray storage frame (2) for supporting the tray so as to be able to be freely taken in and out in the front-rear direction; Disposed between the tray accommodating rack body, inside a jumper cord storage rack body that is a slack storage space jumper cord (3a) (3), side walls (3b facing the jumper cord storage rack body, 3
b) On the inner surface, align one end and the other end of the jumper cord.
Clamp in the row state, and jumper cord
To the open front of the jumper cord storage frame.
And all jumper cords are diagonally parallel
An optical wiring board characterized by being provided with a cord clamp (7, 8) to be held by (1) .