KR200188184Y1 - Opened Y-type branch seperation tube for optical fiber cable of mid-span branching joint - Google Patents

Abstract

The present invention relates to an open Y-type separation tube for protecting the optical fiber core drawn out from the loose tube in the intermediate branch connection with a small fiber in a loose tube type optical fiber cable containing the optical fiber core. In a method of receiving optical fiber cores in a tube based on the protection in the form of a tube, an arbitrary optical fiber core is inserted into the side of the tube and another optical fiber core is inserted into the end of the tube. Even if some of the optical fiber core wires exposed from the phases are cut and separated, it is possible to safely protect them including the separation point, thereby facilitating the intermediate branch connection of the optical fiber core unit from the loose tube. .

Description

Opened Y-type branch seperation tube for optical fiber cable of mid-span branching joint}

The present invention relates to an open Y-type separation tube for the intermediate branch connection of an optical fiber cable, and more particularly, in the loose tube type optical fiber cable (hereinafter referred to as an "optical cable") in which an optical fiber core is accommodated, an intermediate branch connection is made with an optical fiber cable. In an aspect, the present invention relates to an open Y-type separation tube for safely protecting a fiber core drawn out from a loose tube.

In general, a loose tube type optical cable has a structure of which a steel wire or a central tensile line 2 made of FRP is inserted in the center of the shell of the optical cable 1, as shown in FIG. In the space, a plurality of loose tubes 3 surrounding the plurality of optical fiber cores 4 are arranged in a circular shape when viewed in cross section about the center tensile line 2.

In the intermediate branch connection of the optical cable 1, when the branch point is located in the middle of the branch cable, the branch fiber core wire (hereinafter referred to as the "branch core wire") is not cut, but is not cut Is a method of selectively drawing only the lead wires and connecting them with the fiber cores of the branch fiber cable (hereinafter referred to as 'branch core wires'), which does not directly damage the multiple fiber cores housed in the loose tube. The invention of the loose tube cutting machine (not shown) for the fiber cable can cut only the tube allows the connection work of the intermediate branch, which was performed by the individual unit of the loose tube, to be performed by the core line of the optical fiber. Separate methods were required to protect the differentiated cores and the branch cores at the designated points.

That is, as shown in FIGS. 2 and 3 of the accompanying drawings, a process of selectively drawing only the core wire 4B from the branch loose tube 3B in the branch optical cable 1 will be described. First, the loose tube (3B) in which the feeder core wire (4B) is accommodated is cut and cut in the longitudinal and transverse directions with the loose tube cutter (5) for the optical fiber cable to remove the cover portion of the loose tube (3) of the required length. Among the optical fiber cores 4 exposed to the phase of the cut tube 3 cut in this way, only the branching core 4B is selectively cut and separated from the branching cores 4A.

On the other hand, since the optical fiber core wires 4 exposed to the outside due to the cutting of the loose tube 3 are generally weak in tensile strength, damages to the optical fiber core wires 4 due to their handling or storing work in the connection portion are caused. In order to prevent the protection by using a separate tube having the same structure as the loose tube (3).

However, although the conventional tube can insert and protect the optical fiber core wires 4 cut through the axial direction in the longitudinal direction of the tube, for example, a loose tube cut in the intermediate branch connection of the optical fiber core wire 4 unit. (3) Differentiated core wires 4A between phases lie in line with the loose tube 3, and also, the core wire 4B is positioned in a direction other than the longitudinal direction of the loose tube 3 so that the conventional tube As a structure, it is difficult to effectively protect the differentiator and the branched core wires 4A and 4B at the same time.

Therefore, in order to more effectively protect the optical fiber cores 4 placed in such a situation, it is possible to use a spiral lap or the like, such as a method of protecting cables from damage to the shell or impact. The process of protecting the differentiation cores 4A between the loose tube (3) phases cut by a small-diameter spiral wrap like the loose tube (3) should be wound around the differentiation cores (4A) with the spiral wrap. Therefore, its workability is low, and the optical fiber core 4 can be easily damaged even with small carelessness.

Furthermore, as the cut off core 4B is protected by a tube, the tube is inserted into the spiral wrap at the point where the fine branch core 4A and the branch core 4B are separated. The end is not fixed inside the spiral wrap, so that even the small movement of the tube damages the fiber core 4 easily.

These problems are due to the spiral wrap method of protecting the undifferentiated core wire 4A and the branched core wire 4B exposed between phases of the loose tube 3 cut for the intermediate branch connection of the optical fiber core unit from the loose tube 3, respectively. And the use of tubes and the like.

Therefore, the present invention was devised to solve the above problems, and the present invention is to secure the optical fiber core drawn out from the loose tube in the intermediate branch connection with the optical fiber cable in the loose tube type optical fiber cable containing the optical fiber core wire. The purpose is to provide an open Y-type separation tube for protection.

In the open-type Y-type separation tube according to the present invention for achieving the above object, in the method of accommodating the optical fiber core wires in the tube with the basic concept of protecting the optical fiber cores in the form of a tube, any optical fiber core is the side of the tube And any other optical fiber cores to be inserted into the end of the tube, so that some of the optical fiber cores exposed from the cut-off loose tube phase can be secured including the separation point even if they are cut off and separated. It is characterized in that the intermediate branch connection of the fiber core unit from the loose tube can be facilitated.

1 is an exemplary view showing the structure of a common loose tube optical fiber cable,

2 is an exemplary view showing a state in which the optical fiber core wire is drawn out from the loose tube for the intermediate branch connection of the optical cable;

3 is an exemplary view showing a state in which the differentiator and the feeder core wire are separated for the fiber core unit branching,

Figure 4 is a perspective view of the open Y-type separation tube according to the present invention,

Figure 5 is an exemplary view showing a state in which the differential and the core of the core wire is protected by applying the open Y-type separation tube according to the present invention.

* Description of the symbols for the main parts of the drawings *

1: loose tube type optical fiber cable 2: center tension wire

3: loose tube 3A: non-branched loose tube

3B: branched loose tube 4: fiber optic core

4A: Differentiated optical fiber core wire 4B: Branched optical fiber core wire

5: Loose tube cutter for optical fiber cable 6: Open type Y type separation tube

6A: Main Tube 6B: Open Tube

6C: Unopened Tube 6D: Opening

6E: Tube Insertion Hole

Hereinafter, the open-type Y-type separation tube for the intermediate branch connection of the optical fiber cable according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a perspective view for explaining the open Y-type separation tube according to a temporary embodiment of the present invention, Figure 5 is a view showing an embodiment in which the optical fiber core wire exposed from the loose tube by the present invention is protected.

As shown in the drawing, the open Y-type separation tube 6 for the intermediate branch connection of the optical fiber cable has a main tube 6A formed in a straight line and is separated in two directions at any point, and the open tube 6B is not opened. An opening 6D is formed on the surface of the main tube 6A, which is divided into the tubes 6C, and is opened in the longitudinal direction while maintaining a constant width, so that the opening 6B is separated from the tubes 6B. Direction and the other separated tube is not open.

Accordingly, the intermediate point of the undifferentiated core wire 4A is inserted through the opening portion 6D formed on the surface of the main tube 6A and the open tube 6D, and the unopened tube separated to the other side ( Into the tube insertion opening 6E of 6C, the branch core wire 4D drawn into the opening part 6D of the main tube 6A is inserted.

Then, the ends of the cut loose tubes 3 on both sides are introduced into the open direction 6D of the open tube 6D and the main tube 6A, respectively.

In the intermediate branch connection carried out in the optical fiber core unit in the optical cable by the open Y type separation tube 6 according to the present invention, the loose tube 3 is removed at the point where the branch core 4B is drawn out. A method of protecting the branched core wire 4B cut to connect with the branched core wire 4A exposed from the loose tube 3 and the branch core of the branch cable will be described below.

First, only the branching core 4B is cut out of the exposed optical fiber core 4 at the point where the loose tube 3 is cut and selectively separated from the fine branch core 4A.

At this time, the differentiator core wire 4A extends in the axial direction between the cut loose tubes 3 and the open portion 6D of the open Y-type separation tube 6 and the open portion 6D of the main tube 6A. Insert the differentiation core wire 4A and the cut loose tube 3 on both sides simultaneously.

Next, the feeder core 4B is inserted into the opening 6D of the main tube 6A, and at the same time, the end of the feeder core 4D is inserted into the tube insertion opening 6E of the unopened tube 6C. By withdrawing to the other side, the branching core 4A can be selectively and separated from only the branching core 4D in an uncut state so that it can be safely and easily protected.

On the other hand, the optical fiber cores 4 inserted into the opening 6D of the separation tube may come out of the tube again, but the width of the opening 6D is very small, such as several mm, and the open Y branching tube 6 is PE. In addition, the fiber cores 4 of the loose tube 3 are filled with a material such as jelly, and the stickiness of the jelly on the surface of the fiber cores 4 is respectively. This prevents the fiber core wires 4 from being scattered.

In addition, when the optical fiber cores 4 are inserted into the open Y-type separation tube 6 through the opening 6D, the stickiness of the jelly is buried between the inside of the tube and the optical fiber core 4 so that the optical fiber cores 4 themselves Is difficult to get out of the opening 6D.

As described above, the open-type Y-type separation tube according to the present invention selectively secures the fine wires of the differentiator and the branched parts exposed from the loose tube when branched by the core line of the optical fiber in the intermediate branch connection of the loose tube type optical cable. By providing the protection, it is possible to effectively make the intermediate branch connection that will be congested in the subscriber optical line, and to provide the effect of greatly improving the workability of the branch connection.

Claims (2)

The main tube 6A for protecting the core of the optical fiber is formed in a straight line and separated into a Y shape at an arbitrary point, and divided into an open tube 6B and an unopened tube 6C, respectively, and the main tube 6A and the open. On the surface of the tube 6B, an opening 6D which is opened in the longitudinal direction while maintaining a constant width is extended, while the other separated tube is an unopened tube 6C having a tube insertion opening 6E formed therein. Open Y-type separation tube for connecting the optical fiber cable intermediate branch, characterized in that consisting of. 2. The open type Y separation tube (6) according to claim 1, wherein the open type Y separation tube (6) is made of nylon, PVC, PE, iron, or the like.