JPH1084610A - Method for maintaining device for coaxial cable and maintenance tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to perform such maintenance work for replacing or repairing equipment connected to coaxial cables comprising inner and outer conductors for CATV, etc., without interrupting radio waves. SOLUTION: The resin cover D is stripped off the coaxial cables 2 connected to both sides of a deviced subjected to maintenance service to expose an outer conductor C partially. The section where the outer conductor C is exposed is clamped with a conductive connecting tool body 11. A hole E passing through the outer conductor C is bored on the outer conductor C exposed section. A conductive contact needle 13a is inserted into the hole E in such a way as not to contact the outer conductor C. Penetrating a middle insulating layer B, it contacts an inner conductor A. Then, a bypassing coaxial cable is connected to coaxial terminals 13b, 13c electrically connected to the connecting tool body 11 and to a contact needle 13a to provide a bypass. Then, maintenance work is performed for a device connected to coaxial cables.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a method for replacing a device mounted on a coaxial cable used as a cable for a CATV or the like and an apparatus used for the method.

[0002]

2. Description of the Related Art CATV (cable television) is becoming popular with the recent advancement of information technology. This CATV literally sends image information and voice information through a cable, but in the future it is considered that the same cable will be used for two-way communication such as data communication, the Internet, public telephones, facsimile, and security information.

[0003] By the way, a cable is hung on an overhead wire of a telephone pole, but equipment such as an amplifier (amplifier), a distributor, and a branching device is attached to the cable. These devices need to be replaced with new ones. In addition, when a utility pole is relocated or a utility pole damaged by a traffic accident or the like is replaced, it is necessary to remove the equipment once attached. Even if there is no need for replacement, it may be necessary to temporarily turn off the power of the device for simple repair, adjustment, cleaning, or the like. During such maintenance work, the cable is temporarily disconnected, so that it is temporarily impossible to watch the CATV broadcast for a short time.

[0004] However, if the cable is used for data communication or security information communication as described above, the communication may be interrupted even for a short time, even if the CATV broadcast cannot be watched temporarily. Is not allowed. Therefore, it is required to replace the equipment without interruption.

[0005] By providing a bypass circuit between the terminals and using a bypass circuit provided with the equipment during the replacement work of the equipment, the wave stop state can be avoided. However, since the CATV cable is a coaxial cable, it is difficult to provide a bypass.

FIG. 2 is a transverse sectional view (axial sectional view) of the cable, and FIG. 3 is a longitudinal sectional view (sectional view in a direction perpendicular to the axis) of the cable. In the figure, (A) is a copper wire serving as an inner conductor (core wire), (B) is an intermediate insulating layer such as high foamed polyethylene, (C) is an outer conductor (metal outer cylinder) such as an aluminum pipe, (D) ) Is a resin sheath such as polyethylene.

[0007]

Therefore, there is a need for a method of easily bypassing a coaxial cable to maintain equipment attached to the coaxial cable without interruption, and a maintenance tool used therefor. I have.

[0008]

The maintenance method for a coaxial cable device according to the present invention comprises a coaxial cable device (1) mounted on a coaxial cable (2) having an inner conductor (A) and an outer conductor (C). ), The coaxial cable equipment to be maintained.
The outer conductor (C) of the coaxial cable (2) on both sides of (1) is peeled off to partially expose the outer conductor (C), and the exposed portion of the outer conductor (C) is connected to the connector body ( 11), sandwiched by outer conductor
A perforation (E) penetrating the outer conductor (C) is provided in a portion where (C) is exposed, and a conductive contact needle (13a) is inserted into the perforation (E) so as not to contact the outer conductor (C). Coaxial terminals (13b), (13) electrically connected to the connector main body (11) and the contact needle (13a) through the intermediate insulating layer (B) and into contact with the inner conductor (A).
The coaxial cable for bypass (5) is connected to c), and a bypass is provided to perform maintenance work on the coaxial cable device (1).

Alternatively, a method of maintaining a coaxial cable device (1) attached to a coaxial cable (2) having an inner conductor (A) and an outer conductor (C), wherein the coaxial cable device to be maintained is provided.
By pinching the coaxial cable (2) on both sides of (1) with the connector body (20), the conductive outer conductor contact needle (21) protruding toward the coaxial cable side of the connector body (20) is connected to the coaxial cable. (2)
The resin outer skin (D) is penetrated to make contact with the outer conductor (C), and the resin outer skin (D) and the outer conductor (C) are provided with a perforation. Is inserted so that it does not come into contact with the outer conductor (C), and
(A), coaxial terminals (13b), (13c) electrically connected to the outer conductor contact needle (21) and the inner conductor contact needle (13a).
And a bypass coaxial cable (5) is connected thereto to provide a bypass and perform maintenance work on the coaxial cable device (1).

[0010] The maintenance tool for the coaxial cable device (1) of the present invention comprises a conductive connector body (11), a piercing tool (12),
Connector (13), and the connector body (11) is a coaxial cable.
It has a holding portion (11a), (11e) for holding (2), and a threaded mounting hole (11c) in at least a part of a through hole reaching the coaxial cable (2). The tool (12) can open a perforation (E) through the outer conductor (C) of the coaxial cable (2) by screwing into the mounting hole (11c), and the connector
(13) can be mounted on the connector body by screwing into the mounting hole (11c), and a connector contact portion (13g) that is electrically connected to the connector body (11) when mounted. , A contact needle (13a) electrically connected to the inner conductor (A) when mounted, and coaxial terminals (13b), (13) to which a coaxial cable (5) for bypass can be connected.
c), the outer cylinder side (13a) of the coaxial terminal is electrically connected to the connector contact portion (13g), and the core side (13c) of the coaxial terminal has a contact needle (13a). Is electrically connected to the power supply.

[0011] Alternatively, a connecting device body (20) having conductivity,
A piercing tool (12), comprising a connector (13), a connecting tool body (20)
Is a holding portion for holding the coaxial cable (2), a mounting hole in which at least a part of a through hole reaching the held coaxial cable is threaded, and a resin sheath (D) of the held coaxial cable (2).
External conductor contact needle (21) that penetrates through and contacts the external conductor (C)
The piercing tool (12) can open a piercing through the outer conductor (C) of the coaxial cable (2) by screwing into the mounting hole, and the connector (13) is provided with the mounting hole. Can be attached to the connector body (12) by screwing into the external conductor contact needle contact part that is electrically connected to the external conductor contact needle (21) when attached, and the inner conductor when attached. (A) has an inner conductor contact needle (13a) electrically connected thereto, and coaxial terminals (13b) and (13c) to which a coaxial cable for bypass (5) can be connected. The cylinder side (13a) is electrically connected to the external conductor contact needle contact portion, and the core side (13c) of the coaxial terminal.
Are electrically connected to the inner conductor contact needle (13a).

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to preferred embodiments. [Embodiment 1] FIG. 1 is a diagram showing a state in which a coaxial cable amplifier is replaced as a coaxial cable device.

In the drawing, (1) denotes an amplifier to be replaced, which is connected to a cable (2) and attached to a suspension line (3). (4) is a construction amplifier connected to the coaxial cable (5) for bypass.

(6) is a power supply for a work amplifier, and (7) is a power supply for work for maintaining the operation of another amplifier arranged near the amplifier to be replaced during the work. It is.

(10) is a cable (2) and a bypass cable (5)
It is a connecting tool for connecting. Details of the connector and how to use it are shown below. FIG. 4 is a front view showing a state in which the coaxial cable (2) is sandwiched by the holding portion of the connector body (11), and FIG.
6 is a plan view, FIG. 6 is a bottom view, and FIG. 7 is a right side view.

(11) is a connector main body, which is made of metal such as aluminum. (11d) is a tightening knob of the connector body (11), which is turned by turning the knob mounting base (11b).
, The pressing portion (11e) attached to the tightening knob (11d) approaches the cable receiver (11a). That is, the connection tool main body (11) has a pressing portion (11e).
The coaxial cable (2) can be sandwiched between the cable and the cable support (11a).

The resin sheath (D) at the place where the coaxial cable (2) is sandwiched is peeled off, and an aluminum pipe (C) as an external conductor
Is exposed, and the cable holder (11
a) a V-shaped cable receiving portion provided in a) and the pressing portion described above.
(11e), the exposed portion of the aluminum pipe (C) of the coaxial cable (2) is sandwiched.

Next, as shown in FIG.
A piercing tool is provided in the mounting hole (11c) provided to penetrate (11a).
Screw in (12). The mounting hole (11c) is partially threaded so that a punch (12) and a connector (13) described later can be screwed into the mounting hole (11c). FIG. 8 shows a state where the piercing tool (12) is screwed into the mounting hole (11c). Since the tip of the piercing tool (12) is in the form of a pipe and a cutter (12a) is formed at the tip of the piercing tool, the piercing through the aluminum pipe (C) of the coaxial cable (2) by screwing is performed. Can be opened. Even if the piercing tool (12) is screwed to the end, the cutter part (12a) at the tip
It does not reach (A). This is to prevent the copper wire (A) from being damaged and to prevent a short circuit between the copper wire (A) and the aluminum pipe (C).

After the screw is completely inserted, the screw is turned in the opposite direction to remove the piercing tool (12) from the mounting hole (11c). Chips of the aluminum pipe (C) are accumulated in the pipe-shaped tip of the drill (12). Then, when the cleaning button (12b) at the rear end of the piercing tool (12) is pressed, the cleaning rod moves in the front end portion against the spring (12c), and the chips inside are easily discharged to the outside. can do.

Next, as shown in FIG. 9, the connector (13) is screwed into the mounting hole (11c). When the connector (13) is screwed in to the end, the contact needle (13a) with a sharp tip is inserted into the intermediate insulating layer (B).
To contact the copper wire (A) at the center of the coaxial cable (2). At this time, after the contact needle (13a) comes into contact with the copper wire (A), the spring (13f) is pressed so that the contact needle (13a) does not excessively press the copper wire (A) and damage the copper wire (A). ), The tip portion (13a) is relatively retracted.

A coaxial terminal is provided at the rear end of the connector (13), and the core side (13c) of the coaxial terminal is electrically connected to a contact needle (13a) in contact with the copper wire (A). Tube side (13b) is a connector
The connector (13) is electrically connected to the aluminum pipe (C) via the connector contact portion (13g) and the connector main body (11). The part that is energized with the copper wire (A) and the part that is energized with the aluminum pipe (C) are electrically insulated by insulating members (13d) and (13e) such as polyethylene.

Since there are a plurality of types of coaxial cables having different diameters, a plurality of types of connectors having different sizes of V-shaped cable receiving portions and a plurality of types of connectors having different insertion depths at the distal end ( 13) should be prepared and used according to the diameter of the coaxial cable (2) to be worked.

Coaxial cable on both sides of the amplifier (1) to be replaced
Attach the connector body (11) to (2) as described above, and connect the bypass coaxial cable (5) connected to the construction amplifier (4) to the connector (13) of the connector body (11), respectively. , Forming a bypass circuit. At this time, if the construction amplifier (4) is suspended on the suspension line (3) with the suspension tool (8), the work is easy. A power supply is required for the amplifier to operate.In the case of the amplifier (1) in the normal installation state, power is taken from the coaxial cable, but the power supply for the construction amplifier (4) is a power supply (6) From.

During the replacement work, the amplifier (1) to be replaced is switched off so that no current flows through the amplifier (1) in order to prevent a short circuit accident or the like and to ensure the safety of the work. As a result, the power supply of the amplifiers installed in other adjacent places disappears as it is, and the construction power supply (7) is connected as a temporary power supply during construction.

Remove the amplifier (1) to be replaced, and install a new amplifier. When the replacement work is completed and the new amplifier starts operating, the bypass is no longer needed. Therefore, loosen the tightening knob (11d) and remove the connector body (11) from the coaxial cable (2) to remove the bypass, power supply (6), Remove (7).

The place where the connector main body (11) of the coaxial cable (2) was mounted is, as it is, an aluminum pipe (C),
Because the perforation that reaches the copper wire (A) will be exposed,
It is not preferable because it causes cable deterioration due to noise or rainwater.

Therefore, as shown in FIG. 10, an aluminum tape having an adhesive on one side is provided on the exposed portion of the aluminum pipe (C).
Wrap (F) to block perforation (E), wrap vinyl tape (G) to eliminate step with outer skin (D), and heat-shrink waterproof to prevent rainwater from entering from above The sheet (H) is covered and heat-shrinked with a dryer to process.

[Embodiment 2] The basic replacement method of this embodiment is the same as that of Embodiment 1, and only the connection method between the cable (2) and the bypass cable (5) and the connector used therefor are different. . FIG. 11 is a diagram illustrating the connection tool of the present embodiment.

In the case of the first embodiment, the outer resin (D) was partially peeled off, and the aluminum pipe (C) was sandwiched to electrically connect the aluminum pipe (C) and the connector body (11). However, in the case of the present embodiment, the outer conductor contact needle (21) protruding inward (coaxial cable side) into the cable receiving portion of the connector (20), penetrating through the outer cover (D) and contacting the aluminum pipe (C). ) Is provided. This outer conductor contact needle (21) is
Since it is electrically connected to (20), the connector body (20) and the aluminum pipe (C) can be electrically connected without peeling the resin outer cover (D).

Other configurations and procedures of the replacement method are described in the first embodiment.
And the inner conductor contact needle (1) at the tip of the connector (13).
3a) contacts the copper wire (A). The core side of the coaxial terminal is electrically connected to the inner conductor contact needle (13a), and the outer cylinder side of the coaxial terminal is electrically connected to the outer conductor contact needle (21).

In this embodiment, since the connector body (20) is conductive, the external conductor contact needle (21) is connected to the external conductor contact needle contact portion of the connector (13) via the connector body (20). However, when the connector body (20) has no conductivity, the external conductor contact needle (21) may be brought into direct contact with the external conductor contact needle contact portion of the connector (13). Good.

In the above embodiments, the replacement of the amplifier (1) has been described. However, the present invention can be applied to a coaxial cable device such as a distributor and a branch unit other than the amplifier. It can be applied to various maintenance such as.

[0033]

As described above, according to the present invention, CATV
It is now possible to perform maintenance work such as replacement and repair of equipment attached to coaxial cables such as those without interruption.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state when an amplifier for a coaxial cable is replaced.

FIG. 2 is a cross-sectional view of the coaxial cable.

FIG. 3 is a longitudinal sectional view of a coaxial cable.

FIG. 4 is a diagram (front view) showing a state in which a coaxial cable is sandwiched between clamping portions of a connector main body.

FIG. 5 is a diagram (a plan view) showing a state in which a coaxial cable is sandwiched between holding portions of a connection tool main body.

FIG. 6 is a diagram (bottom view) showing a state in which a coaxial cable is sandwiched by a holding portion of the connector main body.

FIG. 7 is a diagram (right side view) showing a state in which a coaxial cable is sandwiched by a holding portion of the connector main body.

FIG. 8 is a view showing a state in which a hole penetrating an aluminum pipe is opened by a punch.

FIG. 9 is a view showing a state in which a connector is inserted into a connector main body.

FIG. 10 is a sectional view of the coaxial cable after the repair.

FIG. 11 is a view showing another embodiment of the connector.

[Explanation of symbols]

 (1) Amplifier (device to be replaced) (2) Coaxial cable (A) Copper wire (inner conductor) (B) Intermediate insulating layer (C) Aluminum pipe (outer conductor) (D) Resin sheath (3) Suspension wire ( 4) Construction amplifier (5) Bypass coaxial cable (8) Suspension tool (11) Connector body (12) Punch tool (13) Connector

Continued on the front page (72) Inventor Masahiko Fujita 6-27, Nakanoshima, Kita-ku, Osaka-shi Inside Kansai Tech Co., Ltd. (72) Inventor Tadahiko Sumi 6-27, Nakanoshima, Kita-ku, Osaka Kansai Co., Ltd. Inside Tech

Claims (4)

[Claims] 1. A method for maintaining a coaxial cable device attached to a coaxial cable having an inner conductor and an outer conductor, comprising: removing a resin sheath of a coaxial cable on both sides of the coaxial cable device to be maintained; The outer conductor is exposed to the outside, the exposed portion of the outer conductor is sandwiched between conductive body parts, and the exposed portion of the outer conductor is provided with a perforation that penetrates the outer conductor. Is inserted so as not to be in contact with the outer conductor, penetrates the intermediate insulating layer and is brought into contact with the inner conductor, and a coaxial terminal for bypass is connected to a coaxial terminal electrically connected to the connector body and the contact needle. A maintenance method for a coaxial cable device, wherein a maintenance work for the coaxial cable device is performed by providing a bypass. 2. A method for maintaining a coaxial cable device attached to a coaxial cable having an inner conductor and an outer conductor, wherein the coaxial cables on both sides of the coaxial cable device to be maintained are sandwiched between connector bodies. An external conductor contact needle having conductivity protruding toward the coaxial cable side of the connecting device main body penetrates the resin outer sheath of the coaxial cable to contact the outer conductor, and a perforation penetrating the resin outer sheath and the outer conductor is provided. An inner conductor contact needle having conductivity is inserted so as not to contact the outer conductor, and penetrates the intermediate insulating layer to make contact with the inner conductor, and a coaxial cable electrically connected to the outer conductor contact needle and the inner conductor contact needle A method for maintaining coaxial cable equipment, comprising connecting a coaxial cable for bypass to a terminal and providing a bypass to perform maintenance work on the equipment for coaxial cable. 3. A connector body having conductivity, a piercing tool,
The connector body has a holding portion for holding the coaxial cable, and at least a part of a through hole reaching the held coaxial cable has a threaded mounting hole, and the piercing tool has the mounting hole. The connector can be attached to the connector main body by screwing into the mounting hole, and the connector can be electrically connected to the connector main body when the connector is inserted. A connector contact portion to be electrically connected, a contact needle electrically connected to the inner conductor when mounted, and a coaxial terminal connectable to a coaxial cable for bypass, and an outer cylinder of the coaxial terminal. A maintenance tool for a coaxial cable device, wherein a side of the coaxial cable is electrically connected to a connector contact portion, and a core of the coaxial terminal is electrically connected to a contact needle. 4. A connector main body, a piercing tool, and a connector, wherein the connector main body has a holding portion for holding a coaxial cable, and at least a part of a through hole reaching the held coaxial cable is threaded. It has a mounting hole and an external conductor contact needle that penetrates the resin sheath of the pinched coaxial cable and contacts the external conductor. The piercing tool penetrates the external conductor of the coaxial cable by screwing into the mounting hole. An external conductor contact needle contact portion that can be perforated, can be attached to the connector body by screwing into the attachment hole, and is electrically connected to the external conductor contact needle when attached, An inner conductor contact needle that is electrically connected to the inner conductor when mounted, has a coaxial terminal that can connect a coaxial cable for bypass, and the outer cylinder side of the coaxial terminal has an outer conductor contact needle contact portion. Electrically connected A maintenance tool for a coaxial cable device, wherein a core side of the coaxial terminal is electrically connected to an inner conductor contact needle.