JP4014884B2 - Repair method for defective cores of communication cables - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for repairing a defective core wire of a communication cable.
[0002]
[Prior art]
In general, as shown in FIG. 8A, a communication cable 1 for local wiring such as a CCP cable is connected or branched via a connection terminal box 2. P is a support. As shown in FIGS. 8B and 8C, the connection terminal box 2 is mainly composed of a box body 2a, an introduction part 2b protruding from both ends thereof, and a fixture 2c. K is a hanging line.
The end portion of the communication cable 1 is introduced into the box body 2a from the introduction portion 2b and is fixed by the fixing bracket 2c. The core wire 1a is drawn out from the end of the communication cable 1 and connected to the core wire 1a of the other communication cable 1 via the connection portion 1b. The communication cable 1 exposed to the outside from the introduction portion 2b is sealed with a sealing tape 3, and further protected with a protective tape 3 'wrapped around it so that rain or the like does not enter.
[0003]
By the way, the core wire 1a of the communication cable 1 for local wiring causes a communication failure such as disconnection or crosstalk for some reason, and requires repair work, that is, repair.
Conventionally, a defective core wire of a communication cable has been repaired by replacing all the sections of the communication cable having the defective core wire over one section or several sections.
Incidentally, the defective core wire of the communication cable is mainly found by measuring the line loss with a measuring instrument or visually when repairing a telephone line.
[0004]
[Problems to be solved by the invention]
However, in the repair by the above conventional method, since all cables must be replaced for one section or several sections, not only the construction is large, but also most of the healthy cables other than the core wire of the defective part There was a problem such as wasting, and improvement of the repair method was requested.
[0005]
The present invention has been made in order to solve the above-described conventional problems, and an object of the present invention is to provide a communication cable capable of repairing a defective core wire quickly and easily without wasting a healthy cable. The object is to provide a method for repairing a defective core.
[0006]
[Means for Solving the Problems]
In the method for repairing a bad communication cable core wire of the present invention, after removing the connection terminal box, the end sheath of the communication cable is cut by a desired length to expose the core wire, and between the core wires on both sides of the bad cable core. with connecting split insertion split insertion core wire,該割Ri put remove defective core wire portion, followed by the inner end of the connecting portion in which a part or all is positioned outside of the left and right from a box body of the connecting terminal box making It is characterized by protecting with a protective pipe having a protective pipe attached to the part, and further, attaching a protective taper pipe to the end of the protective pipe to protect the communication cable, and then attaching a connection terminal box. Moreover, it replaces with the said protection pipe and a protection taper pipe, and uses the protection pipe with a taper pipe which integrated these. Further, the integrated protective pipe with a taper pipe has a structure integrated with the introduction portion of the connection terminal box. Further , the protective pipe or the protective taper pipe is covered with a sealing tape and cured.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an example of a repair state of a core wire in a connection terminal box repaired by the method of the present invention. 1 is a communication cable, 1a is its core wire, 2 is a connection terminal box, and 2a is a box body. Reference numeral 2b denotes an introduction portion, 2c denotes a fixing bracket, 3 denotes a sealing tape, and K denotes a suspension line (support line), which are basically the same members and have the same functions as the conventional one shown in FIG.
[0008]
Reference numeral 1a 'denotes an interrupt core, which is interrupted between the cores 1a on both sides of the defective portion to be removed, and is connected via the connecting portion 1b'. Since some or all of these connecting portions 1b 'are located on the left and right outward from the box body 2a, they are covered and protected by the protective pipe 4. A protective tube 6 is inserted into the inner end of the protective pipe 4. In addition, an interruption core wire means the core wire connected with a bypass at the both ends of the defective part of a cable core wire.
[0009]
As shown in FIG. 2A, the protective pipe 4 has a cut portion 4a formed in the longitudinal direction and can be opened as indicated by a virtual line. Further, the cut portion 4a is provided with a fitting connection portion 4a ', and is closed in a fitted state so that rain or the like does not enter from the cut portion 4a. As the protective pipe 4, for example, a “CCP cable repair pipe” manufactured by Furukawa Electric Co., Ltd., which is formed of polyethylene resin or nylon resin and whose outer surface is covered with soft plastic or rubber is used. Can do.
[0010]
As shown in FIG. 1, the outer end of the protection pipe 4 and the end of the communication cable 1 are covered and protected by a protection taper pipe 5. As shown in FIG. 2B, the protective taper pipe 5 includes a tapered portion 5a having a taper and a fitting portion 5b connected to the protective pipe 4 in a fitted state. Reference numeral 5c denotes a split slit, which can close the protective taper pipe 5 in a resilient state. The tapered end portion of the tapered portion 5a is cut at an appropriate position in the longitudinal direction in accordance with the thickness of the communication cable 1. As the protective taper pipe 5, for example, a “tip nozzle of a CCP cable repair pipe” manufactured by Furukawa Electric Co., Ltd., formed of polyethylene resin, nylon resin, or the like can be used.
[0011]
Next, a repair method will be described. First, in the state before the repair shown in FIGS. 8B and 8C, the protective tape 3 'and the sealing tape 3 are peeled off, and the connection terminal box 2 and the fixture 2c are removed. Subsequently, the outer sheaths at the ends of the left and right communication cables 1 are cut to a required length to expose the core wire 1a, and split between the core wires 1a on both sides of the defective portion as shown in FIG. Insert the centering wire 1a '. 1b 'is a connecting portion 1b' between the core wire 1a and the interrupting core wire 1a '. When the insertion of the interrupting core 1a 'is completed, the core 1a at the defective portion indicated by the broken line is removed, and the interrupting operation of the interrupting core 1a' is completed as shown in FIG. .
[0012]
When the interruption work is completed, the core wire 1a of the defective portion is removed. Subsequently, as shown in FIG. 4A, the protective pipe 4 is attached. When the protective pipe 4 is attached, first, as shown by a virtual line in FIG. 2A, the cut portion 4a of the protective pipe 4 is opened, and the core wire of the connecting portion 1b 'is connected to the protective pipe 4 from the cut portion 4a. Insert inside. A protective tube 6 is inserted into the inner end of the protective pipe 4 and fixed with a protective tape 3 'to prevent the interrupted core wire 1a' from rubbing against the hard inner edge of the protective pipe 4 and being damaged. . Similarly to the protective taper pipe 5, a split slit is formed in the protective pipe 6. As the protective tube 6, “Protective cover for CCP cable repair pipe” manufactured by Furukawa Electric Co., Ltd. can be used.
[0013]
When the mounting operation of the protection pipe 4 is completed, the inner end portion thereof is fixed by the fixing bracket 2c, and then the protection taper pipe 5 is mounted as shown in FIG. 4 (B). When attaching the protective taper pipe 5, the fitting portion 5 b is fitted into the end portion of the protective pipe 4, and the tapered portion 5 a is attached to the communication cable 1. The protective taper pipe 5 is wound around the sealing tape 3 and then wound around the protective tape 3 'to prevent rain and the like from entering. When the attachment of the protection pipe 4 and the protection taper pipe 5 is completed, the connection terminal box 2 is attached as shown in FIG. 1 to complete the repair work.
[0014]
FIG. 5 shows a second embodiment of the present invention. By using a protective pipe 7 with a tapered pipe in which the protective pipe 4 and the protective tapered pipe 5 of the first embodiment shown in FIG. The work efficiency is improved and the work efficiency is improved.
[0015]
FIG. 6 shows a third embodiment of the present invention, in which the protective pipe 4 and the protective tapered pipe 5 of the first embodiment shown in FIG. 1 are integrated with the introduction part 2b of the connection terminal box 2, That is, the introduction part 2b is a long introduction part 2b ', thereby further simplifying the members and further improving the work efficiency.
[0016]
In each of the above embodiments, the repair method when the defective core wire is inside the connection terminal box 2 has been described. However, when the defective core wire is in the communication cable 1 outside the connection terminal box 2, FIG. As shown in the fourth embodiment, the outer core of the communication cable 1 in the defective core portion is cut open, the interrupt core 1a 'is inserted and connected, and the protective pipe 4 extends from the connection portion to the communication cables 1 on both sides. At the same time, protective taper pipes 5 may be attached to both ends, and repaired by curing with sealing tape 3 and protective tape 3 '. Further, the protective taper pipe 5 may be integrally formed at both ends of the protective pipe 4.
[0017]
【The invention's effect】
1) After removing the connection terminal box in which the core wire is defective, tear off the outer sheath of the communication cable to the desired length to expose the core wire, and insert the core between the core wires on both sides of the defective portion. In addition to interrupting and connecting the wire, the core wire of the interrupting portion was removed, and then the connecting portion was protected by a protective pipe, and a protective taper pipe was attached to the end of the protective pipe to protect the communication cable. After that, by attaching a connection terminal box, it is possible to quickly and easily make an interrupt connection and repair the sound cable without wasting it.
2) Instead of the protective pipe and the protective tapered pipe, by using a protective pipe with a nozzle that integrates them, the members can be simplified and the work efficiency can be improved.
3) By attaching a protective tube to the inner end of the protective pipe, it is possible to effectively prevent the core wire from being damaged by friction with the protective pipe.
4) After removing the connection terminal box in which the core wire is defective, tear off the outer sheath of the communication cable to the desired length to expose the core wire, and insert the core between the core wires on both sides of the defective portion. In addition to interrupting and connecting the wire, the core wire of the interrupting part was removed, and then a long introduction part was provided integrally on both ends of the box body and protecting the connection part and the communication cable. By attaching the connection terminal box, it is possible to quickly and easily perform the repair connection and repair without wasting a healthy cable.
5) Cut the outer sheath of the communication cable in which the core wire defect has occurred to the desired length to expose the core wire, and connect the interrupted core wire between the core wires on both sides of the defective portion. By removing the core wire of the insertion portion, and subsequently protecting the interrupting core wire and the connection portion with a protective pipe, and further attaching a protective taper pipe to the end of the protective pipe to protect the communication cable, Can be repaired quickly and easily without waste.
6) By applying a sealing tape to the protective pipe or the protective taper pipe and curing it, it is possible to effectively prevent intrusion such as rain.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing an embodiment of the present invention.
2 is a perspective view (A) of the protective pipe of FIG. 1, a perspective view (B) of the protective tapered pipe, and a perspective view (C) of the protective pipe.
FIGS. 3A and 3B are explanatory views (A) and (B) of an interrupting operation of an interrupting core wire showing an embodiment of the method of the present invention.
4A and 4B are an explanatory diagram (A) of the work for installing the protective pipe following FIG. 3 and an explanatory diagram (B) of the work for installing the protective taper pipe.
FIG. 5 is an explanatory view showing a second embodiment of the present invention.
FIG. 6 is an explanatory view showing a third embodiment of the present invention.
FIG. 7 is an explanatory view showing a fourth embodiment of the present invention.
FIG. 8 is an explanatory view (A) showing a state of an overhead wire of a conventional communication cable, a connection terminal box, a half sectional view (B) showing a connection state thereof, and a half sectional view (C) seen from the end face direction. .
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Communication cable 1a Core wire 1a 'Split core wire 1b Connection part 1b' Connection part 2 Connection terminal box 2a Box body 2b Introduction part 2b 'Elongate introduction part 2c Fixing bracket 3 Sealing tape 3' Protection tape 4 Protection pipe 4a Cut section 4a 'fitting connection section 5 protective taper pipe 5a taper section 5b fitting section 5c split slit 6 protective pipe 7 protective pipe K with taper pipe Suspension line (support line)
P prop

Claims (4)

After removing the connection terminal box, the end sheath of the communication cable is cut to the desired length to expose the core wire, and the split core wire is inserted and connected between the core wires on both sides of the defective core wire. Remove the defective core wire in the insertion part, and then protect part or all of the connection part located on the left and right outside from the box body of the connection terminal box with a protection pipe with a protection pipe attached to the inner end. Furthermore, after attaching a protective taper pipe to the end of the protective pipe to protect the communication cable, a connection terminal box is attached.   2. The method for repairing a defective core wire of a communication cable according to claim 1, wherein a protective pipe with a tapered pipe integrated with the protective pipe and the protective tapered pipe is used.   The method for repairing a defective core wire of a communication cable according to claim 2, wherein the integrated protective pipe with a tapered pipe has a structure integrated with the introduction portion of the connection terminal box.  The method for repairing a defective core wire of a communication cable according to any one of claims 1 to 3, wherein a sealing tape is applied to the protective pipe or the protective taper pipe for curing.

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