JPS584B2 - Optical fiber cable extra length processing section - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure of an optical fiber surplus length processing section of an optical fiber cable.

Figure 1 shows the configuration of a conventional optical fiber cable surplus length processing section, where 1 and 1' are optical fiber core wires, and 2 and 2' are communication intervening pairs and feeder lines (hereinafter referred to as intervening intervening lines) made of metal wires, etc. 3 is an optical fiber cable surplus length processing section, 4 is a tension member and an intervening equal connection section 5 is a maintenance device such as a pressure sensor, 6 is an optical fiber cable connector, and 7 is an optical fiber cable surplus length processing section. This is a housing part for an optical fiber connector.

Generally, an optical fiber cable consists of a plurality of optical fiber core wires 1, 1', a tension member placed in the center of the cable to maintain the tension of the cable, and intervening pairs 2, 2'.
It is usually composed of.

When connecting optical fiber cables, the extra length of the optical fiber core wire of about 1 m, the tension member, the intervening equal connection part 4, and the maintenance equipment 5 are set efficiently, taking into consideration the line maintenance. , and must be accommodated with good workability.

It is also desirable to be able to easily disassemble and repair the connection in the event of a failure.

As a method for processing excess fiber length at the optical fiber cable connection section, the intervening peer connection work is first performed,
After the connection work is completed, the intervening pair connecting part 4 is accommodated in the center of the internal cavity of the optical fiber surplus length processing part 3.

Then, the optical fibers are connected using a known connection method.

After the connection work has been completed, the optical fibers are subjected to extra length processing on the optical fiber cable extra length processing section 3 one by one or every plurality of fibers, and then wound around the extra length processing section.

In the above-mentioned method, since the intervening pair is housed inside the cylinder of the extra length processing unit, in the event of a failure of the intervening pair, it is necessary to unravel the fiber extra length processing unit and dismantle the inside of the cylinder for repair. Not only is the work complicated, but it also has the disadvantage of requiring time to reprocess the excess length.

In addition, the space of the processing section is divided into cylinders, and the tension member is arranged at the center of the cylinder of the processing section, so that the space for accommodating maintenance equipment 5 such as a pressure sensor for monitoring gas pressure can be secured. This had the disadvantage that the cylindrical shape had to be made thicker, making the processing section larger.

In order to solve these drawbacks, the present invention includes a central axis from the surface of the excess length processing section of the optical fiber cable in order to accommodate the tension member, the intervening peer connection section, and maintenance equipment in the optical fiber cable surplus length processing section. It is characterized by a groove in the axial direction, and its purpose is to enable the connection of the optical fiber core wire and the connection with the tension member and intervening counterpart to be performed independently, thereby improving the efficiency of processing excess length and work efficiency. In the event of a failure of the intervening fiber, it is possible to take out the intervening fiber from the outside without dismantling the excess length processing section of the fiber core and repair it easily, and to install maintenance equipment in the groove. The goal is to secure a space to accommodate the

The present invention will be explained in detail below with reference to the drawings.

FIG. 2 is a diagram showing one embodiment of the present invention, and FIG. 3 is a sectional view perpendicular to the axial direction of the optical fiber cable surplus length processing section shown in FIG. 2.

2 and 3, 1 and 1' are optical fiber cable cores, 2 and 2' are intervening pairs and tension members, 3 is an optical fiber cable surplus length processing section, and 4 is a tension member and intervening pairs, etc. A connection part, 5 is maintenance equipment, 6 is an optical fiber connector, 7 is a housing part for the optical fiber connector, 8 is a groove for accommodating the connection part 4, and 9 and 9' are optical fiber cables. .

To configure the extra length processing section as shown in Fig. 2, when connecting the optical fiber cables 9, 9', first connect the intervening pair and tension members 2, 2' using a well-known method. The connecting portion 4 and the maintenance equipment 5 are accommodated in the groove 8.

This groove 8 therefore needs to be wide enough to accommodate the intervening counters, tension members and maintenance equipment.

The optical fibers 1, 1' are connected to the optical fiber connector 6 in a well-known manner, and after this connection is completed, the optical fibers 1, 1' are connected to the connector 6.
is fixed to the optical fiber connection accommodating section 7, and the extra length of the optical fiber is processed by the optical fiber extra length processing section 3 so as not to span the groove 8.

In addition, the connection of optical fiber core wires 1 and 1' and the intervening pair 2.2
′ can be connected in any order.

The fiber surplus length processing section of the present invention, as described above, provides the groove 8 in the surplus length processing section to perform intervening connections, and independently connects the optical fiber cores, thereby improving workability. can be expected to improve.

In addition, even if a failure occurs in the intervening device after the optical fiber has been connected, there is no need to unravel the excess length of the optical fiber or disassemble the excess length processing section as in the past. Since the intervening counterpart can be easily taken out, faulty repair and maintenance of the intervening counterpart can be performed with good work efficiency.

Note that the maintenance equipment is not necessarily all housed in the groove of the extra length processing section, and even if a part of it is exposed outside, there is no problem because the connection section is protected by the outer frame.

Therefore, there is an advantage that the connection space can be used effectively.

As explained above, the optical fiber cable surplus length processing section of the present invention has a groove formed in the axial direction from the surface of the surplus length processing section so as to include the central axis in the optical fiber cable surplus length processing section. Since the optical fiber core wire connection and the intervening peer connection can be performed independently, it is expected that work efficiency will be improved.

Note that if a failure occurs in the intervening pair after the optical fiber core wire connection work is completed, the intervening pair can be easily taken out and the failure repaired, resulting in good workability and easy maintenance.

Another advantage is that maintenance equipment and the like can be accommodated in the groove, allowing effective use of space.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a conventional optical fiber cable surplus length processing section, FIG. 2 is a diagram of an embodiment of the present invention, and FIG. 3 is a diagram of the optical fiber cable surplus length processing section shown in FIG. 2. FIG. 3 is a cross-sectional view perpendicular to the axial direction. 1.1'... Optical fiber core wire, 2.2'... Intervening pair and tension member, 3... Optical fiber core extra length processing section, 4... Connection part of tension member, intervening pair, etc. , 5... Maintenance equipment such as pressure sensors, 6...
Optical fiber connector, 7... Receptacle for optical fiber connector, 8... Groove for accommodating connection part 4, 9, 9'.
...Optical fiber cable.

Claims (1)

[Claims] 1. In an optical fiber cable surplus length processing section that has a connector for connecting optical fiber core wires and a accommodating section for accommodating this connector, the longitudinal length is 1. An optical fiber cable core extra length processing section, characterized in that a groove having a predetermined width and a depth including the center axis of the extra length processing section is formed from the surface of the extra length processing section.