JP2000166048A - Method and structure for reconnecting aluminum pipe coaxial cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively reconnect an aluminum pipe without stopping a line, if the aluminum pipe is cut in a ring when an aluminum pipe coaxial cable is used. SOLUTION: A reconnecting structure consists of a braided wire 5 for shielding that is wound around a part that is cut in a ring, a longitudinally divided pipe 6 whose cross-section is a semicircular shape pressed against the part that is cut in a ring and its surrounding aluminum pipe, and a partially cut ring 8 for pressing both the end parts of the vertically divided pipe 6. A thread-shaped groove is provided at two locations, that sandwich the part that is cut in a ring inside the vertically divided pipe 6. The thread-shaped groove inside the longitudinally divided pipe 6 slightly bites into the aluminum pipe 3 to forcibly connect a cable. A braided wire 5 for shielding prevents electronic waves from leaking from the part that is cut in a ring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum pipe type coaxial cable which is used for removing a ring breakage fault in an aluminum pipe type coaxial cable used for cable television transmission or the like. The present invention relates to a reconnection method and a reconnection structure.

[0002]

2. Description of the Related Art An aluminum pipe-type coaxial cable used for transmission of cable television (CATV) buckles after laying due to the influence of other electric work or lack of slack after laying. May develop. FIG. 5 shows a state in which a wheel break 11 occurs in the aluminum pipe-type coaxial cable in a slack portion of the aluminum pipe-type coaxial cable. Slack is a slack formed in a semicircular shape for buffering expansion and contraction of the cable due to temperature fluctuation when an aluminum pipe type coaxial cable is laid on a utility pole or the like. . If buckling or breakage occurs in the aluminum pipe type coaxial cable, an obstacle such as deterioration of a received image occurs.

When a wheel breakage fault occurs, a cable reconnection process is performed as follows. (1) Replace one span (about 300 m) of the coaxial cable. (2) Several tens of centimeters centered on the fault location of the coaxial cable
Cut off, lay a new coaxial cable for insertion, and reconnect to the existing cable part with FT connector and JJ adapter. (3) As an emergency measure, wrap aluminum foil around the obstacle.

[0004]

In either of the above methods (1) and (2), the line must be stopped during operation. There is also a problem that removing and re-laying the cable is expensive. In addition, since the method (3) is only an emergency treatment, the part of the aluminum pipe ring is spread over time due to the weight of the cable or the wind, so that the image failure again occurs. There is a problem that occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and when an aluminum pipe breaks, a reconnection of the aluminum pipe can be performed at low cost without stopping the line. An object of the present invention is to provide a reconnection method and a reconnection structure of an aluminum pipe type coaxial cable that can be performed.

[0006]

SUMMARY OF THE INVENTION A method of reconnecting an aluminum pipe type coaxial cable according to the present invention is to remove a jacket around a failure point of the coaxial cable to expose the aluminum pipe and form a threaded groove therein. A pair of vertically split pipes is placed on an aluminum pipe, and partially cut-out rings are fitted into both ends of the vertically split pipe.

[0007] The method of reconnecting an aluminum pipe type coaxial cable may include a step of forming a flat slack centered on a broken portion of the coaxial cable.

Further, the method may include a step of winding the shield braided wire around the obstruction before covering the vertically split pipe on the aluminum pipe.

The reconnection structure of the aluminum pipe type coaxial cable according to the present invention is a pair of vertically split pipes having a shield braided wire wound around a failure location and a threaded groove inside the aluminum pipe surrounding the failure location. And an aluminum pipe and a partially cut-out ring which is fitted to both ends of the combined vertical pipe.

[0010] The inner diameter of the ring is slightly larger than the outer diameter of the combined vertical pipe, and the notch is formed to have a size that allows the coaxial cable to pass therethrough.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing a reconnection structure of an aluminum pipe type coaxial cable according to the present invention. As shown in FIG. 1, the reconnection structure includes a braided shield wire 5 wound around a broken section, a vertically split pipe 6 having a semicircular longitudinal section pressed against an aluminum pipe around the broken section and the surrounding area, and a vertically split pipe. 6 comprises a notched ring 8 which is partially cut off at both ends.

The vertical pipe 6 has good conductivity, is harder than the aluminum pipe of the coaxial cable, has high mechanical strength such as tension and bending, so that no problem occurs at the time of power supply. A metal that is lightweight and hardly causes electrical corrosion, for example, an aluminum alloy is used. A rubber sheet 7 having a thickness of several millimeters is attached to a vertical circumferential portion of the vertically split pipe 6 so as not to damage the cable. In addition, screw-shaped grooves are provided inside the vertically split pipe 6 at two locations so as to sandwich a broken portion.

The braided shield wire 5 is used to prevent radio waves from leaking out of the loop, and is, for example, tinned copper. Further, the inner diameter of the partially cut-out ring 8 is slightly larger than the outer diameter of the vertically split pipe 6, and the cut-out portion is large enough to allow a coaxial cable to pass therethrough.

A method of reconnecting an aluminum pipe type coaxial cable will be described below with reference to FIGS. FIG.
Is the broken part (the broken part) of the aluminum pipe 11
FIG. 1 is a front view showing a state in which a sheath (external insulator) 4 is removed, and a cross-sectional view showing a cross section of an aluminum pipe type coaxial cable. As shown in FIG. 2, the aluminum pipe type coaxial cable has a structure in which a central conductor 1, an internal insulator 2, an aluminum pipe (external conductor) 3, and an external insulator 4 are laminated in a circular cross section from the middle side. It is.

As shown in FIG. 5, when a wheel breakage fault occurs, first, as shown in FIG. 3, a flat slack (slack) is formed in the coaxial cable around the wheel breakage point. Next, the outer jacket (outer insulator 4) of the coaxial cable is removed by about 4 cm, centering on the broken section.
Then, the braided shield wire 5 is wound around the broken portion.

Next, as shown in FIG. 4, a pair of vertically divided pipes 6 is put on the aluminum pipe 3 of the coaxial cable, and the two vertically divided pipes 6 are joined by a dedicated pushing jig. Then, the screw-shaped groove inside the vertically divided pipe 6 slightly bites into the aluminum pipe 3 and the cable is firmly connected.

Next, a partially cut-out ring 7 is fitted into both ends of the vertical pipe 6 so that the connection is not loosened. By inserting the ring 7, the vertically split pipe 6
The biting of the aluminum pipe 3 into the screw-shaped groove inside the hole is ensured. Further, the ring 7 functions to prevent the bite from loosening. Since the notch is provided in the ring 7, the ring can be fitted into the aluminum pipe 3 without disconnecting the coaxial cable.

Then, a self-fusing tape, a waterproof tape, and a PVC tape are wound around the vertically divided pipe 6 to perform a waterproof treatment. If a rubber adhesive is further applied on the tape for waterproofing, the waterproofness is further improved. The reason why the flat slack is formed in the coaxial cable is to prevent the bending force from being concentrated on the cable at the root of the vertically divided pipe 6 due to wind or temperature difference. By forming the slack, it is possible to withstand repeated bending of the cable for a long time.

As described above, according to this embodiment,
The tensile strength is 1 due to the effect of the threaded groove of the vertically split pipe 6.
It becomes 00 kgf or more, and the aluminum pipe 3 of the broken coaxial cable is reliably prevented from opening over time. In addition, radio waves do not leak from the broken portion of the wheel.

[0020]

According to the present invention, there is provided a method of reconnecting an aluminum pipe type coaxial cable, comprising the steps of: removing a jacket around a failure point of the coaxial cable to expose the aluminum pipe; And a step of fitting a partially cut ring at both ends of the vertically split pipe, so that the following effects are obtained. .

(1) The reconnection work can be performed without cutting the existing coaxial cable, and the work can be performed without stopping the line. (2) Since the screw-shaped groove inside the vertically split pipe cuts into the aluminum pipe of the coaxial cable, the connection strength is strong.
In addition, since sufficient continuity is provided between the outer conductors on both sides of the failure location, the portion where the jacket is removed can be made smaller, and as a result, the connection structure can be made smaller. (3) Since no screws are used, the connection structure can be downsized. (4) Since the structure of the vertically split pipe is simplified and miniaturized, the connection structure is inexpensive. (5) The work is also simple.

In the case where the method of reconnecting the aluminum pipe type coaxial cable includes a step of forming a flat sag centered on a loop portion of the coaxial cable,
The bending force does not concentrate on the cable at the root of the vertically split pipe due to wind or temperature difference. As a result, it can withstand long-term use.

When a step of winding the shield braided wire around the obstacle before the vertically split pipe is put on the aluminum pipe is included, it is possible to reliably prevent the radio wave from leaking from the failed part.

According to the present invention, a reconnection structure for an aluminum pipe-type coaxial cable has a shield braided wire wound around an obstacle and a threaded groove inside the aluminum pipe surrounding the obstacle. Since the pair of vertically divided pipes has a structure including an aluminum pipe and a partially cut-out ring that is fitted to both ends of the combined vertically divided pipe,
The effect of (5) is achieved.

The inner diameter of the ring is slightly larger than the outer diameter of the combined vertically split pipe, and the cutout is formed large enough to allow the coaxial cable to pass through, so that the existing coaxial cable can be reconnected without cutting. Can perform construction.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a reconnection structure of an aluminum pipe type coaxial cable according to the present invention.

FIG. 2 is a front view showing a state where an external insulator is peeled off at a broken portion (a broken portion) of an aluminum pipe, and a cross-sectional view showing a cross section of an aluminum pipe-type coaxial cable.

FIG. 3 is an explanatory diagram showing a state in which a slack is provided in a coaxial cable, and a braided wire for shielding is wound.

FIG. 4 is a perspective view showing a state in which a vertically split pipe and a ring are attached to a broken portion of the wheel.

FIG. 5 is an explanatory diagram showing a state where a wheel breakage fault has occurred.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Center conductor 2 Inner insulator 3 Aluminum pipe (outer conductor) 4 External insulator 5 Braided wire for shielding 6 Vertical split pipe 7 Rubber sheet 8 Ring 9 Coaxial cable 11 Break point of aluminum pipe

Claims (5)

[Claims] 1. A method for reconnecting a faulty part of an aluminum pipe-type coaxial cable in which a fault has occurred, comprising removing a jacket around the faulty part of the coaxial cable to expose the aluminum pipe, and internally forming a screw-shaped part. A method for reconnecting an aluminum pipe-type coaxial cable, comprising: placing a pair of vertically split pipes having a groove on an aluminum pipe, and fitting partially cut rings into both ends of the vertically split pipe. 2. The method for reconnecting an aluminum pipe-type coaxial cable according to claim 1, wherein a flat slack is formed around a broken portion of the coaxial cable. 3. The method for reconnecting an aluminum pipe-type coaxial cable according to claim 1, wherein the shield braided wire is wound around the obstacle before the vertical pipe is put on the aluminum pipe. 4. A reconnection structure for reconnecting a faulty part of an aluminum pipe-type coaxial cable in which a fault has occurred, comprising: a shield braided wire wound around the faulty part; An aluminum pipe type coaxial, comprising: a pair of vertically split pipes having a threaded groove therein; an aluminum pipe; and a partially cut-out ring fitted into both ends of the combined vertically split pipe. Cable reconnection structure. 5. The reconnection structure for an aluminum pipe-type coaxial cable according to claim 4, wherein the inner diameter of the ring is slightly larger than the outer diameter of the combined vertical pipe, and the cutout is large enough to allow the coaxial cable to pass therethrough. .