KR20040027173A - Optical fiber separation apparatus - Google Patents

Abstract

PURPOSE: An optical fiber separating apparatus is provided to allow for ease of fixation of optical fiber protection tube and maintenance of tube. CONSTITUTION: An optical fiber separating apparatus comprises an insertion pipe(1) coupled and fixed to a slot unit, and which has a through hole; a separating cap(2) arranged to be attachable/detachable to/from the insertion pipe, wherein the separating cap has a through hole having a size corresponding to the size of the through hole of the insertion pipe; and a plurality of optical fiber lead-out members(31,32,35,36,37,38) having a cylindrical shape, and which are arranged at an end of the separating cap. The number of the optical fiber lead-out members arranged at the end of the separating cap is larger than the number of the slots of a slot unit where the insertion pipe is coupled.

Description

Optical fiber separation apparatus

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical distribution device for an optical cable, and more particularly, to protect an optical fiber core wire (hereinafter referred to as an “optical core wire”) during an inlet installation operation of a ribbon optical cable, and to remove an optical core wire of a certain core from an optical cable slot unit. An optical fiber separating apparatus for separating and introducing into an optical cable distribution device.

In general, there are a number of access / distribution / switching points on the optical cable line from the telephone station to the subscriber, depending on the location of the pipeline, manhole infrastructure, subscribers, and subscriber types such as offices and general housing. At the switching point, optical distribution devices such as an optical distribution panel, an optical junction box, an optical intermediate switching box, and an optical premises terminal are provided.

Such an optical distribution device is a device for drawing, connecting, storing, and distributing an optical cable, and includes a connection tray, a connector panel, a cable and a tension wire fixing device, and an optical fiber protection tube.

The connection tray is used to fix and protect the optical fiber connector, to organize and store the optical fiber cable, and the connector panel is to distribute and transfer the incoming cable into multiple outgoing cables. It is to protect the incoming and outgoing optical cables from external mechanical shocks such as torsion and tensile force, and the fiber core protection tube is for introducing a certain number of fiber cores from the optical cable into each connection tray without affecting the optical loss.

The optical cable is generally divided into a loose tube type and a slot unit type.

In the case of the loose tube type in which the optical core is embedded in the loose tube, a certain number of optical cores can be introduced into the connection tray by a simple process of inserting the protective tube into the loose tube. However, in the case of the slot unit type, since up to 32 cores are embedded in one slot, an additional separation device and a protective tube are required to draw 32 cores or less into the connection tray.

Thus, when using the optical cable slot unit type according to the need for a protective tube is provided with an optical cable slot unit protective tube, the conventional optical cable slot unit protective tube is configured as shown in FIG.

1 is a schematic diagram of a conventional optical cable slot unit protection tube.

As shown in FIG. 1, the conventional optical cable slot unit protection tube is formed with a slot unit insertion tube 12 inserted into an optical cable slot unit on one side of a cylindrical body 11, and receives an optical fiber from the slot unit on the opposite side. A plurality of optical fiber lead-out openings 13 into which protective tubes to protect are inserted are formed.

By the way, the conventional optical cable slot unit protection tube is integrally formed with the slot unit insertion tube 12 and the optical fiber lead-out port 13, and is formed only with the optical fiber lead-out port 13 of the same number of slots as the slot unit. There is a problem of poor usability.

In other words, since 32 cores in one slot, that is, 32 cores, must be introduced into the access / storage tray through a single fiber outlet and a single protective tubing, a protection tube containing less than 16 cores into the connection tray is required. There is a disadvantage that cannot be used.

In addition, since the protective tube is inserted into the optical fiber outlet 13, and the protective tube is fixed using an adhesive or the like, the installation and maintenance work is cumbersome, and the protective tube is prevented by the mechanical shock such as the movement of the connection / storage tray. There is a fear that the fiber is separated from the outlet 13 and affects the optical core.

The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to easily fix an optical fiber protecting tube, and to facilitate installation and maintenance.

1 is a schematic diagram of a conventional optical cable slot unit protection tube.

Figure 2 is a perspective view of the optical fiber separation device and the coupling tube according to an embodiment of the present invention.

Figure 3 is an exploded perspective view of the insertion tube and the separation cap of the optical fiber separation apparatus according to an embodiment of the present invention.

4 is a cross-sectional view of an optical fiber separator according to an embodiment of the present invention.

5 is a cross-sectional perspective view of an optical fiber outlet and a protective tube of the optical fiber separator according to the embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

1: Insertion tube 2: Separation cap

3: optical fiber outlet 4: protective tube

5: fiber 6: groove

7: Jam jaw 8: protrusion

9: central axis of optical fiber outlet 10: central axis of separation cap

The present invention for achieving the above technical problem,

An optical fiber separating device for separating and connecting an optical fiber cable from a slot unit-shaped optical cable introduced into an optical distribution device including an optical fiber connection / storage tray and a connector panel, wherein the optical cable is fastened and fixed to the slot unit. Formed insertion tube; A separation cap capable of fastening and separating with the insertion tube and having a through hole having a size corresponding to the through hole of the insertion tube; And a plurality of optical fiber outlets formed in a cylindrical shape at one end of the separation cap, and the number of optical fiber outlets formed at one end of the separation cap is greater than the number of slots of the slot unit to which the insertion pipe is fastened. The diameters of the through-holes of the optical fiber lead-out port are the same.

Preferably, the number of optical fiber outlets is eight, and in this case, it is preferable that the central axis of each optical fiber outlet is diagonally disposed on the central axis of the separation cap.

Also preferably, the optical fiber lead out may have a groove in the longitudinal direction and a locking jaw formed perpendicular to the groove on an extension line of the groove.

Also, preferably, the optical fiber lead-out port is manufactured to accommodate the optical fiber of 16 cores.

Hereinafter, an optical fiber separating apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.

First, the present invention is used for the optical cable distribution apparatus.

The optical fiber distribution device is equipped with an optical fiber connection / storage tray, and the optical cable entering the optical cable distribution device must be connected to the optical fiber connection / storage tray.

Therefore, after the optical cable introduced into the optical cable distribution device is fixed by the cable and the tensioning wire fixing device in the optical cable distribution device, the optical fiber is separated by the optical fiber separating device connected with the protection tube and introduced into the optical fiber connection / storage tray. Is connected.

Here, in the connection / storage tray, an optical core connection / storage tray having a receiving core of 12-24 is frequently used to facilitate maintenance due to the connection and storage of the optical core.

The optical fiber separating apparatus of the present invention is for separating a predetermined number of cores of the optical cable when the optical cable is introduced into the optical cable distribution apparatus and connecting the protective tube and the connection / storage tray.

One embodiment of the present invention for achieving this is shown in Figures 2-5.

2 is a perspective view of the optical fiber separation apparatus and the protection tube in accordance with an embodiment of the present invention. As shown in FIG. 2, the optical fiber separator of the present invention includes an insertion tube 1, a separation cap 2, and optical fiber outlets 31, 32, 33,. '3').

Insertion tube (1) is to be inserted into, and fixed to the optical cable slot unit, a cylindrical through-hole is formed with a single through hole.

Here, the single through hole is manufactured in consideration of the diameter of the slot unit to be fixed to the slot unit without using another fixing device. That is, one side of the connection hole connected to the slot unit is made slightly larger than the diameter of the slot unit, and the inner diameter is made smaller as the slot unit is inserted, so that it is immediately inserted and fixed in the slot unit of the optical cable.

At this time, the other side of the insertion tube (1) to form a spiral bone in the form of a male screw to be fastened with the separation cap (2).

Separation cap (2) is a part which is separated and fastened to the insertion tube (1), a through hole corresponding to the through hole of the insertion tube (1) is formed, and fastened to the part that is fastened to the other side of the insertion tube (1) Spiral valleys are formed on the inside in the form of sand yarns.

Thus, the separation cap 2 and the insertion tube 1 are fastened as shown in FIG. 2, and detachable as shown in FIG. 3. 3 is an exploded perspective view of the insertion tube 1 and the separation cap 2 of the optical fiber separation apparatus according to the embodiment of the present invention.

The plurality of optical fiber outlets 3 of the present invention are formed at one end of the separation cap 2, that is, on the opposite side of the helical valley, and have a cylindrical shape having a small through hole.

Here, in the present invention, the number of optical fiber outlets 3 is made larger than that of the slot unit in order to allow the number of shims to be flexibly adapted to different protective tubes. In particular, the number of optical fiber lead-out openings 3 is eight.

Therefore, as shown in FIG. 2, the present invention is formed more than twice the number of optical fiber outlets compared with the conventional one shown in FIG. At this time, the number of slots of the slot unit into which the insertion tube is inserted is four, and one optical fiber lead-out port accommodates a protective tube containing optical fibers of up to 16 cores.

4, the optical fiber lead-out port 3 will be described in more detail.

4 is a cross-sectional view of the optical fiber separating device according to the embodiment of the present invention, which is cut along the longitudinal direction of the separating cap 2 and the optical fiber outlets 31 to 38.

As shown in FIG. 4, the separation cap 2 and the optical fiber outlets 31 to 38 are conductive, and the central axis 10 of the separation cap 2 is the central axis of the optical fiber outlets 31 to 38. It is arrange | positioned diagonally at (9).

As described above, the central axis 10 of the separation cap 2 and the central axis 9 of the optical fiber wire outlets 31 to 38 are arranged diagonally, so that the optical core wire is moved from the small diameter insertion tube to the large diameter outlet. It is possible to prevent the bending of the optical fiber by inserting it so that the radius of curvature of the optical fiber can be kept constant.

Accordingly, as the radius of curvature of the optical fiber is kept constant, the overall shape of the optical fiber outlets 31 to 38 is crosswise symmetric with each other about the central axis 10 of the separation cap 2, as shown in FIG. 4. It will be formed in the form.

Through the cross-shaped optical fiber outlets 31 to 38, the two optical fiber outlets 31 to 38 are paired to separate the desired core bows, which were possible only in the loose tube type optical cable, even in the slot unit type ribbon optical cable. Make it possible.

That is, as shown in FIG. 1, since four optical fiber outlets corresponding to the number of four slots are conventionally formed, the entire optical cores accommodated in the slots (for example, 32 cores) are protected by a single optical fiber outlet. Although it is possible to draw into the access / storage tray via a tube, but if you want to separate the core wire contained in one slot (e.g. 16 cores or less) and store it in the protection tube, four or more optical fiber outlets are required but not corresponding. I couldn't.

However, the present invention can cope with a protective tube of 16 cores or less by having eight optical core lead outlets.

If you want to use a 32 core protection tube, the present invention can be fastened to the insertion tube by replacing the separation cap attached to the optical fiber withdrawal port as shown in FIG.

On the other hand, when the protective tube is inserted into the optical fiber outlet 31 to 38, the protective tube may be distorted or dislodged when a force (or impact) is applied from the outside.

In order to solve this problem, the present invention provides a longitudinal groove 6 on the inner surface of each of the optical fiber outlets 31 to 38 and a groove 6 on an extension line of the groove 6, as shown in FIG. A locking jaw 7 that forms a right angle is formed. In addition, a protrusion 8 is formed at an arc portion of the protective tube 4 corresponding to the groove 6 and the locking step 7.

Accordingly, when the protective tube 4 is coupled to the optical fiber lead-out part 3, the protrusion 8 of the protective tube 4 enters the optical fiber lead-out part 3 along the groove 6 and catches with the locking jaw ( When it is rotated to 7) side is supported and fixed by the locking step (7). Therefore, the protective tube 4 is not separated from the optical fiber lead-out portion 3 even when an external force is applied.

At this time, those skilled in the art will form a groove into which the locking jaw 7 can be fitted in the protrusion 8 so that the projection tube 8 and the locking jaw 7 when the protective tube 4 is fitted into the optical fiber lead-out portion 3. Can be fixed by fastening.

The technical spirit of the present invention has been described above with reference to the accompanying drawings, but this is by way of example only and not intended to limit the present invention. In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

According to the present invention, various types of optical fiber separation devices can be applied to introduce optical fiber wires into the connection / storage trays without affecting optical loss depending on the number of optical cores of the optical fiber connection / storage trays mounted in the optical distribution device. In addition, there is an effect that the protective tube can be fixed to the optical fiber lead-out port without using an additional mechanism such as a cable tie or an adhesive.

Claims (4)

In the optical fiber separation device for separating and connecting the optical fiber wire from the slot unit-shaped optical cable introduced into the optical distribution device including an optical fiber connection / storage tray and a connector panel, An insertion tube fastened and fixed to the slot unit and having a through hole; A separation cap capable of fastening and separating with the insertion tube and having a through hole having a size corresponding to the through hole of the insertion tube; And It includes a plurality of optical fiber lead outlet formed in a cylindrical shape at one end of the separation cap, And the number of optical fiber outlets formed at one end of the separation cap is greater than the number of slots of the slot unit to which the insertion pipe is fastened, and the diameters of the through-holes of the optical fiber outlets are the same. The method according to claim 1, The number of the optical fiber lead-out port is 8, wherein the central axis of each optical fiber lead-out port is disposed diagonally on the central axis of the separation cap. The method according to claim 2, The optical fiber lead outlet, An optical fiber separation apparatus, characterized in that a longitudinal groove and an engaging jaw perpendicular to the groove are formed on an extension line of the groove. The method according to claim 2, The optical fiber lead-out port is an optical fiber separation device, characterized in that is manufactured to accommodate the optical fiber of 16 cores.