JP3403923B2 - Optical fiber cord holder - 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 cord holder used for an optical fiber cable distribution board or the like.

[0002]

2. Description of the Related Art Conventionally, as an optical fiber cable distribution board of this type, for example, an optical intermediate distribution board (IDF; Intermediate Distributing Frame) for connecting a line side optical fiber cable outside a station to a device side optical fiber cable inside the station. There is. This optical IDF board is configured by incorporating trays in multiple stages in a cabinet that is a housing. This tray is a fusion tray, a line side connector tray, and a device side connector tray, and each is provided as a plurality of units.

The line side optical fiber cable is drawn from outside the station into the cabinet and guided to the line side connector tray. At this time, the end of the line-side optical fiber cable pulled into the cabinet is once fused and connected to the end of the optical fiber cord with a one-end connector. The fusion splicing section accommodates the fusion splicing portion. After that, the other end of the optical fiber cord to which the connector is attached is connected to the adapter in the line-side connector tray.

The adapter in the connector tray on the device side is
Optical fiber cables connected to various optical devices in the station are connected to connectors. These intra-station optical devices are connected to a line-side optical fiber cable outside the station by connecting the adapters in the connector trays on the line side and the device side by optical fiber cords with connectors at both ends. The adapters can be switched and connected by replacing the optical fiber cords with connectors at both ends, and any in-station optical device can be connected to any out-of-station optical fiber cable.

The above-mentioned optical fiber cords are held by the optical fiber cord holder 5 shown in FIG. 5 and are organized in the cabinet. This optical fiber cord holder 5
Is attached to the wall surface of a partition plate 1 provided on both sides of each tray unit, and an aluminum plate is bonded to the frame body 2 bent in a U-shape and the frame body 2. It is composed of a square sponge 3. The back surface of the frame body 2 is adhered to the wall surface of the partition plate 1. Further, the square sponge 3 is divided into two sponges 3a and 3b with a slit formed in the center. The optical fiber cords 4a, 4b, ... Are inserted in the slits and sandwiched between the sponges 3a, 3b.

[0006]

However, in such a conventional optical fiber cord holder 5, it is necessary to bend the aluminum plate to form the frame body 2, and the sponge 3 is bonded to the frame body 2. However, the sponge 3 must be slit. After that, the work of adhering the frame body 2 to the wall surface of the partition plate 1 is required. That is, the conventional optical fiber cord holder 5 could not be easily set.

When the optical fiber cord cannot be sandwiched between the pair of sponges 3a and 3b, it is necessary to separately prepare the optical fiber cord holder 5 having the same configuration as that shown in FIG. Then, the prepared new holder must be adhered to the wall surface of the partition plate.

Further, in the above-mentioned conventional optical fiber cord holder 5, when the optical fiber cord is bent and held, the optical fiber cord may be excessively bent, resulting in a transmission loss in the optical fiber cord.

Further, in the above-mentioned conventional optical fiber cord holder 5, in order to change the wall mounting position of the holder, it is necessary to remove the adhered holder from the wall surface and reattach the holder to a new position. . Therefore, it is difficult to freely change the layout for mounting the conventional optical fiber cord holder on the wall surface.

[0010]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a plurality of rod-shaped core members which are erected on a wall surface at a predetermined interval and each of these rod-shaped core members. is held, to sandwich the optical fiber cord between those held in the adjacent bar-shaped core material, radius optical fiber code
The optical fiber cord holder is composed of a cylindrical elastic member having a bending radius such that the cord does not cause transmission loss .

According to this structure, the optical fiber cord holder can be set only by erecting the rod-shaped core member on the wall surface and supporting the cylindrical elastic member on the rod-shaped core member.

When the optical fiber cord cannot be sandwiched between the pair of cylindrical elastic members, one of the cylindrical elastic members and another cylindrical elastic member adjacent thereto are provided. It is possible to hold an optical fiber cord that cannot be sandwiched between them. That is, the optical fiber cord can be sandwiched between different cylindrical elastic members by simply adding and preparing one cylindrical elastic member and one rod-shaped core member.
It is not necessary to prepare a pair of cylindrical elastic members and a rod-shaped core material.

[0013]

Further, the radius of the cylindrical elastic member is the optical fiber.
Since the cord has a bending radius that does not cause transmission loss, if the optical fiber cord is bent along the outer periphery of the cylindrical elastic member, the optical fiber cord will not be excessively bent and transmission loss will not occur.

Further, the present invention is characterized in that a plurality of holes in which the rod-shaped core material is erected are formed in advance on the wall surface at predetermined intervals.

According to this structure, the cylindrical elastic member can be attached to a desired position by erecting the rod-shaped core material in the hole formed at the desired position. Therefore, the layout of the optical fiber holder can be freely changed, and the layout of the holder can be easily changed by changing the holes for attaching the rod-shaped core members.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment in which the optical fiber cord holder according to the present invention is used in an optical IDF board will be described.

FIG. 3 shows a schematic structure of this optical IDF board.

A multi-core, for example, 128-core, line-side optical fiber cable 12 is drawn into a station 11 of a communication carrier such as an outdoor cubicle or a telecommunication room. The optical fiber cable 12 is guided to an optical IDF board 13 installed in the station 11, and is further distributed and connected to each optical device via a transmission device rack 15 having an optical transmission module 14.

A fusion tray unit 16, a line side connector tray unit 17 and a device side connector tray unit 18 are provided in the optical IDF board 13. The end of any one optical fiber cable 12a in the multi-core optical fiber cable 12 has an optical cord 1 with a one-end connector.
It is fusion-spliced to the end portion of 9. The fusion splicing portion is housed in the fusion tray 16a.

A plug is attached to the other end of the optical fiber cord 19 with a one-end connector, and this plug is the adapter 2 provided in the line side connector tray 17a.
It is plugged into one end of 0. A plug attached to one end of an optical fiber cord 21 with connectors at both ends is inserted into the other end of the adapter 20, and the optical fiber cords 19 and 21 are connected by an optical connector.

The plug attached to the other end of the optical fiber cord 21 is inserted into one end of an adapter 22 provided in the device side connector tray 18a. A plug attached to one end of an optical fiber cable 23 with connectors on both ends is inserted into the other end of the adapter 22, and the optical fiber cord 21 is connected to the optical fiber cable 2.
Connected to 3. The optical fiber cable 23 is connected to the optical transmission module 14 in the transmission device frame 15.

In addition to the optical fiber cable 12a, any number of optical fiber cables in the multi-core optical fiber cable 12 are connected to the line side connector tray unit via the fusion tray unit 16 in the same manner as described above. Each of the 17 adapters 20 is connected by an optical fiber cord 19 with a one-end connector. Further, each optical transmission module 14 in the transmission device rack 15 is connected to each adapter 22 of the device-side connector tray unit 18 by an optical fiber cable 23 with connectors at both ends. Therefore, by connecting between the arbitrary adapter 20 and the adapter 22 by the optical fiber cord 21 with connectors at both ends, it is possible to connect the arbitrary line side optical fiber cable 12 to the arbitrary optical transmission module 14.

FIG. 4 shows the inside of the optical IDF board 13, and the tray units 16, 17, and 18 are housed in a cabinet 31. Each tray has two angles 32
It is supported by a and 32b. In addition, the cord holding boards 33 are provided on both sides of each tray unit 16, 17, 18.
a and 33b are provided. The cord holding boards 33a and 33b form a partition plate that partitions the internal space of the cabinet 31, and an optical fiber cord holder 34 is attached to the wall surface on the tray side.

The optical fiber cord holder 34 is attached to the wall surface of the cord holding board 33 as follows.

As shown in FIG. 1A, female thread holes 41 are preliminarily formed in the cord holding board 33 at a constant pitch. This pitch corresponds to the diameter of the cylindrical sponge 43 described later. First, the male screw portion 42a cut at the end of the rod-shaped core member 42 is screwed into the female screw hole 41, and the rod-shaped core member 42 is erected on the wall surface of the cord holding board 33.

Next, as shown in FIG. 3B, the cylindrical sponge 43 is inserted into the rod-shaped core material 42 until it comes into contact with the wall surface. The cylindrical sponge 43 constitutes a cylindrical elastic member, and has a hollow pipe shape with a hole in the shaft core. The inner diameter of this hole is set smaller than the outer diameter of the rod-shaped core member 42. Therefore, when the rod-shaped core material 42 is inserted into this hole of the cylindrical sponge 43, the elastic force of the cylindrical sponge 43 holds the cylindrical sponge 43 on the rod-shaped core material 42.

Further, the cylindrical sponge 43 has a radius which comes into contact with the outer peripheral surface of the adjacent cylindrical sponge 43.
Therefore, as shown in FIG. 3C, when the optical fiber cord 44 is pushed between the pair of cylindrical sponges 43a and 43b, the optical fiber cord 44 is elastically exerted by the cylindrical sponge 43 so that each cylindrical sponge 43a, It is sandwiched between 43b.

According to the optical fiber cord holder according to the present embodiment as described above, the rod-shaped core member 42 is erected on the wall surface of the cord-holding board 33, and the cylindrical sponge 43 is inserted into the rod-shaped core member 42 and held. The optical fiber cord holder 34 can be set just by making it.

Therefore, the optical fiber cord holder 34 having such a simple structure according to this embodiment can be easily attached to the wall surface. At this time, the cylindrical sponge 43 can be fixed by simply inserting it into the rod-shaped core member 42, and it is not necessary to fix the sponge using an adhesive as in the conventional case. Further, since the sponge 43 has a cylindrical shape, the optical fiber cord 44 sandwiched between the sponges 43 is used.
Easy to pick and take out.

A pair of cylindrical sponges 43a, 43
When the optical fiber cord 44 cannot be completely sandwiched between b, the optical fiber cord 44 which cannot be completely sandwiched between the one cylindrical sponge 43b and another cylindrical sponge 43c adjacent thereto is sandwiched. It can be done.

That is, according to the present embodiment, the optical fiber cord 44 that cannot be sandwiched between the other sponges 43b and 43c is held only by additionally preparing the cylindrical sponge 43c and the rod-shaped core member 42 one by one. Therefore, it is not necessary to prepare the pair of sponges 43 and the rod-shaped core member 42. Therefore, unlike the conventional case, it is not necessary to separately prepare the optical fiber cord holder 5 having the same structure. Therefore, according to the present embodiment, a large number of optical fiber cords 44 can be held with a small number of parts.

Further, the radius of the cylindrical sponge 43 is set to a bending radius at which the optical fiber cord 44 does not cause transmission loss, and as shown in FIG.
If 4a is bent along the outer circumference of the cylindrical sponge 43a,
The optical fiber cord 44a will not be bent too much as in the conventional case. Therefore, the optical fiber cord 44 is not subjected to stress strain more than necessary, and transmission loss does not occur unlike the conventional case.

In this way, the radius of the cylindrical sponge is set to the bending radius at which the transmission loss does not occur only at the corner portion where the optical fiber cord needs to be bent and wired.
The radius of the cylindrical sponge at which the optical fiber cord is linearly wired may be equal to or smaller than the bending radius.
Further, even in the corner portion, it is not necessary to set all the cylindrical sponges to the above bending radius, and as shown in FIG. 2, only one side side cylindrical sponge 45 is set to the above bending radius. All you have to do is In addition, in FIG.
The same parts as those in FIG.

On the wall surface of the cord holding board 33,
By forming a plurality of female screw holes 41 in which the rod-shaped core member 42 is erected at predetermined intervals in advance, the rod-shaped core member 42 can be freely erected at a desired wall surface position. Therefore, the cylindrical sponge 43 can be attached to a desired wall surface position, and the layout of the optical fiber holder 34 can be freely arranged. Further, by attaching the rod-shaped core member 42 to another female screw hole 41, the layout of the optical fiber cord holder 34 can be easily changed.

In the above embodiment, female threaded holes 41 are formed in the wall surface of the cord holding board 33, male threaded portions 42a are formed at the ends of the rod-shaped core members 42, and the rod-shaped core members 42 are threaded into the female screw holes. The case where it is screwed onto the 41 has been described. However, the form in which the rod-shaped core material is erected on the wall surface is not limited to such a form.

For example, a configuration may be adopted in which a simple hole is formed in the wall surface and a nut is screwed into the male screw portion on the back surface through the hole to fix the rod-shaped core member to the wall surface. Alternatively, the end of the rod-shaped core material may be press-fitted into the hole formed in the wall surface and fixed without using screws. In the case of such a form, if a punching board having a large number of holes with a constant pitch is used as the plate material of the cord holding board 33, the layout of the optical fiber cord holder and its change can be more easily performed.

In the above embodiment, the optical fiber cord holder 34 is attached to the wall surface of the cord holding board 33, but the optical fiber cord holder 34 may be attached to the inner wall surface of the cabinet 31. Good. Further, although the cylindrical elastic member has been described as a sponge in the above embodiment, the present invention is not limited to this.
Other members having the same softness as the sponge may be used. In each of such cases, the same effect as that of the above-described embodiment can be obtained.

[0039]

As described above, according to the present invention, the optical fiber cord holder can be set only by erecting the rod-shaped core member on the wall surface and holding the cylindrical elastic member on the rod-shaped core member. I can. Therefore, the optical fiber cord holder is easily attached. Therefore, the wiring work and the removal work of the optical fiber cord can be easily performed.

When the optical fiber cord cannot be fully sandwiched between the pair of cylindrical elastic members, one of the cylindrical elastic members and another cylindrical elastic member adjacent thereto are provided. It is possible to hold an optical fiber cord that cannot be sandwiched between them. Therefore, a large number of optical fiber cords can be held with a small number of parts.

Further, the radius of the cylindrical elastic member is set to a bending radius at which the optical fiber cord does not cause transmission loss .
Fit, if Magere along the optical fiber cord on the outer circumference of the cylindrical elastic member, will not excessively bend the optical fiber cord,
There is no transmission loss.

Further, a plurality of holes in which the rod-shaped core material is erected are formed in the wall surface at predetermined intervals in advance, and the rod-shaped core material is erected in the holes formed at desired positions, so that a desired shape is obtained. A cylindrical elastic member can be attached at the position. Therefore, the layout of the optical fiber holder can be freely changed, and the layout can be easily changed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an optical fiber cord holder according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a modified example of the optical fiber cord holder shown in FIG.

FIG. 3 is a diagram showing a schematic configuration of an optical IDF board.

FIG. 4 is a perspective view showing an internal configuration of an optical IDF board.

FIG. 5 is a perspective view of a conventional optical fiber cord holder.

[Explanation of symbols]

31 ... Cabinet 32 ... Angle 33 ... Code holding board (partition plate) 34 ... Optical fiber cord holder 41 ... Female screw hole 42 ... Rod-shaped core material 42a ... Male thread portion of the rod-shaped core material 42 43, 45 ... Cylindrical sponge 44 ... Optical fiber cord

Claims (3)

(57) [Claims] 1. An optical fiber cord between a plurality of rod-shaped core members standing upright on a wall surface at a predetermined interval, and a rod-shaped core member held by each of these rod-shaped core members and held by an adjacent rod-shaped core member. The optical fiber cord with a radius of between the two causes a transmission loss
An optical fiber cord holder comprising a cylindrical elastic member having a non-bending radius . 2. The optical fiber cord holder according to claim 1 , wherein a plurality of holes in which the rod-shaped core material is erected are formed in the wall surface in advance at predetermined intervals. 3. A process according to claim 1 or claim, wherein the wall is a wall of the partition plate partitioning the interior wall wall or the housing of the housing constituting the optical fiber cable distribution frame
The optical fiber cord holder described in 2 .