JPH09139116A - Metal covered cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and simply perform cable laying work and make the cable working appearance better. SOLUTION: This metal covered cable is provided with a conductor 5 for transmitting electric, a cable sheath 1 provided outside this conductor 5, and a metal cover 3 provided outside this cable sheath 1. In this metal covered cable, a plurality of dummy wires 2 of small outer diameter is arranged outside the cable sheath 1 to provide certain space between the cable sheath 1 and the cable sheath 3. Thereby, it is possible to perform removal work of the metal cover while performing wiring work of the metal covered able with general-purpose tools, and the work can be easily performed without damaging a cable sheath.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal-coated cable in which a conductor is provided with a protective metal coating, and more particularly, it is not necessary to protect the cable by using a cable tray or a conduit when laying the cable. It relates to the cable structure, manufacturing method and construction method.

[0002]

2. Description of the Related Art Conventionally, when a cable is laid, a cable tray or a conduit is not used to protect the cable, and a cable is provided with a protective metal coating. Has been adopted.

FIG. 5 is a side view (a) and a sectional view (b) showing a structural view of a conventional metal-coated cable. FIG.
FIG. 7 is an explanatory diagram showing a coating stripping process for a conventional metal-coated cable.

As shown in these figures, in the conventional metal-coated cable, the cable sheath 1 is provided outside the plurality of conductors 5.
Is provided, the metal coating 3 is spirally wound so as to contact the outside of the cable sheath 1, and there are many products in which the anticorrosion coating 4 is applied to the outside of the metal coating 3.

At the time of construction, as shown in FIG.
Strip the anticorrosion coating 4 on the end of the cable with a knife or a cutter for the required length (a, b in FIG. 6), and then cut the end of the metal coating 3 with gold scissors, and cut the cut portion. Raise it (c, d in FIG. 6), insert it into the groove provided in the tip of the tool 12 (e in FIG. 6), and rotate the tool 12 (f in FIG. 6) to attach the metal coating 3 to the cable. The method of stripping along was taken.

[0006]

However, when laying the above-mentioned conventional metal-coated cable, it is necessary to strip the metal coating when connecting the core wire to the terminal block or the like. Since great care must be taken not to damage the sheath, a great deal of time and effort is required in the process.

This labor-intensive method requires a lot of man-hours, which is the reason why the use of metal-coated cables is shunned, and an improvement to a cable structure that can adopt a construction method that does not require man-hours is made. Was wanted.

If a metal-coated cable is not used as the cable, a conduit is installed and the cable is passed through it. If the cable is long, a pull box or the like is placed in the middle of the length of the conduit. Construction work such as installation in the cable was required, and a lot of construction work was involved in laying the cable.

On the other hand, when installing with a metal-coated cable,
Since the cables laid meander due to the dead weight and bending of the cables, it may be unsightly if the support intervals are not narrowed, and the construction may become large, which is an improvement measure.

Therefore, an object of the present invention is to provide a structure, a manufacturing method, and a construction method of a metal-coated cable which can easily and simply carry out a cable laying construction and can improve a cable construction appearance. And

[0011]

A metal-coated cable of the present invention is a metal-coated cable having a conductor for transmitting electricity, a cable sheath provided outside the conductor, and a metal coating provided outside the cable sheath. In the cable, a constant space is provided between the cable sheath and the metal coating.

With this, since there is a certain space between the cable sheath and the metal coating, a blade such as a metal pipe cutter is used in the space when stripping the metal coating when laying the metal coated cable. It can be stopped easily and damage to the cable sheath with its blade can be reduced.

Further, the metal-coated cable of the present invention is provided with a conductor for transmitting electricity, an insulator covering the outside of the conductor, a cable sheath made of an insulator covering the insulator, and an outside of the cable sheath. A metal-coated cable having a metal coating, and a plurality of small outer diameter dummy wires arranged outside the cable sheath, and a metal coating wound around the dummy wires and the cable sheath. It is preferable to provide a predetermined space between the sheath and the metal coating.

Since a space is formed outside the cable sheath by the width of the dummy wire, it is possible to manufacture a metal-coated cable having a predetermined space between the cable sheath and the metal coating easily and reliably.

Here, it is preferable that at least one of the plurality of small outer diameter dummy wires is a strong metal wire.

Thus, by fixing the metal wire in the dummy wire to the support when the cable is not installed and applying tension, it is possible to correct the bending when the cable is laid and to eliminate the meandering after the cable is laid. it can.

Further, the metal-coated cable of the present invention is provided with a conductor for transmitting electricity, an insulator covering the outside of the conductor, a cable sheath made of an insulator covering the insulator, and an outside of the cable sheath. A metal-coated cable having a metal coating, a plurality of small outer diameter dummy wires arranged outside the cable sheath, and a metal coating wound around the dummy wire and the outside of the cable sheath,
In a method of constructing a metal-coated cable in which at least one of the plurality of dummy wires having a small outer diameter is a strong metal wire, the both ends of the metal wire are fixed to a support when the metal-coated cable is laid. By applying tension,
It is preferable to correct the bending when laying the cable.

The metal-coated cable of the present invention has a conductor for transmitting electricity, a cable sheath provided on the outside of the conductor, and a metal coating provided on the outside of the cable sheath. In a method of constructing a metal-coated cable having a certain space between the metal-coated cable and the metal-coated cable, in the case of constructing the metal-coated cable, a direction perpendicular to the metal-coated cable from the outer surface of the position where the outer cover of the metal coating is to be stripped It is preferable that a blade of a tool such as a copper pipe cutter is actuated toward and to cut and extract only the metal coating with the blade within the space between the metal coating and the cable sheath.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view (a) and a sectional view (b) showing a structural view of a metal-coated cable according to a first embodiment of the present invention. This metal-coated cable includes a conductor 5 for transmitting electricity and a cable sheath 1 provided outside the conductor 5.
And a metal coating 3 provided on the outside of the cable sheath 1. Here, in this metal-coated cable, a constant space is provided between the cable sheath 1 and the metal coating 3.

In order to provide a constant space between the cable sheath 1 and the metal cover 3, a plurality of dummy wires 2 having a small outer diameter are arranged outside the cable sheath 1.

Further, in the present metal-coated cable, the metal coating 3 is spirally covered so as to cover the cable sheath 1 and the dummy wire 2, and the outside of the metal coating 3 is protected by the vinyl sheath anticorrosive coating 4. Has been applied.

Further, each conductor 5 is covered with an insulating material 6, and a plurality of these wires are combined and twisted at a constant interval, and the finished cable is wound around a drum 7 shown in FIG. 4 for transportation. The cable is suitable for. One of the dummy wires 2 is a piano wire.

FIG. 2 is an explanatory view showing a method for manufacturing a metal-coated cable according to the second embodiment of the present invention. First,
The outside of the conductor 5 is covered with an insulating material 6 which is an insulator, and the outside of the insulating material 6 is covered with a cable sheath 1 made of an insulating material.

Thereafter, while a plurality of small outer diameter dummy wires 2 are attached to the outside of the cable sheath 1, a band-shaped metal coating 3 is spirally wound around the outside of the dummy wires 2 and the cable sheath 1. With these, a predetermined space can be provided between the cable sheath 1 and the metal coating 3.

Then, in order to coat the vinyl sheath 4 on the outside of the metal coating 3, while the molten vinyl is fed from the nozzle, the metal-coated cable is fed while being fed at a constant speed.

3 and 4 are explanatory views showing the terminal treatment of the metal-coated cable according to the third embodiment of the present invention. When laying the cable, the metal-coated cable is laid while being unwound from the cable drum 7, and then cut.

Next, as shown in FIGS. 3A and 3B, the coating is stripped off to connect the cut portion to the terminal block. First, the metal coating 3 is set as a hand-held tool, for example, by a copper pipe cutter 8 on the outer cover, and the rotary blade a is bitten into one point.
At this time, the metal coating 3 is stopped when the blade penetrates in a range where it does not contact the cable sheath 1. Then, the copper sheath cutter 8 is rotated to cut the entire circumference of the vinyl sheath 4 and the metal coating 3.

That is, when the present metal-coated cable is installed, a blade of a tool such as a copper pipe cutter 8 is actuated in a direction perpendicular to the metal-coated cable from the outer surface of the position where the jacket of the metal coating 3 is to be stripped off. The metal coating 3 with the blade inside the space between the metal coating 3 and the cable sheath 1.
Cut and remove only the chisel.

Here, in the present metal-coated cable, there are three dummy wires 2 each having a small outer diameter.
If at least one of them is a strong metal wire, for example, a piano wire, the other dummy wire 2 such as a vinyl wire is cut, but the piano wire remains uncut by the copper tube cutter 8 and is thus supported. Can be fixed to and used to prevent snaking on the entire cable.

That is, when the present metal-coated cable is laid, both ends of the metal wire in the dummy wire 2 are fixed to the support to apply tension, so that the bending when laying the cable can be corrected.

When the metal coating 3 is removed, the conventional cable protected by the cable sheath 1 is exposed. Therefore, the cable sheath 1 is stripped off with a cutter or the like, the strands of wire are stripped off, and the crimp terminal 9 is attached to the terminal block. Connect to.
A flexible conduit 11 is used between the cut portion of the metal coating 3 and the terminal box as shown in FIG. 4, but the metal conduit 3 and the vinyl sheath 4 are fixed to each other by a connecting fitting 10 which is fastened to the outside. .

As a result, according to the method of constructing the metal-coated cable of the present invention, the conventionally used conduit is unnecessary and the cable laying work becomes extremely easy.

In this embodiment, the dummy line 2 is set to 3
Although an example in which one of the books is a piano wire is shown as a book, the number and material of the dummy wires are not limited to these. Also, an example has been shown in which vinyl is further coated on the outside of the metal coating, but the presence or absence of this vinyl coating does not limit the conditions for carrying out the present invention.

[0035]

As described above, according to the present invention, it is possible to easily form a fixed space between the metal-coated portion of the metal-coated cable and the cable sheath. By providing a metal-coated cable with this structure, it is possible to remove the metal coating with a general tool when laying the metal-coated cable, and to easily perform the laying work without damaging the cable sheath. Since it can be done, there is an effect regardless of the skill level of the work, and the economic effect is great by the cable laying work that does not use conduits.

Further, according to the present invention, by using a metal wire having strength as a dummy wire, it is possible to prevent meandering at the time of construction of the metal-coated cable and improve the appearance of construction.

[Brief description of the drawings]

FIG. 1 is a side view (a) and a sectional view (b) showing a structural diagram of a metal-coated cable according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a method for manufacturing a metal-coated cable according to a second embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a terminal treatment of a metal-coated cable according to a third embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a specific form of terminal treatment of the metal-coated cable in FIG.

FIG. 5 is a side view (a) and a sectional view (b) showing a structural view of a conventional metal-coated cable.

FIG. 6 is an explanatory view showing a coating stripping process for a conventional metal-coated cable.

[Explanation of symbols]

 1 Cable Sheath 2 Dummy Wire 3 Metal Cover 4 Vinyl Sheath 5 Conductor 6 Insulating Material 7 Cable Drum 8 Copper Tube Cutter 9 Crimping Terminal 10 Connection Metal Fitting 11 Flexible Conduit 15 Dummy Wire Drum 16 Metallic Band Steel Drum

Claims (6)

[Claims] 1. A metal-coated cable having a conductor for transmitting electricity, a cable sheath provided outside the conductor, and a metal coating provided outside the cable sheath, wherein the cable sheath and the metal coating are provided. A metal-coated cable characterized in that a certain space is provided therebetween. 2. A metal coating having a conductor for transmitting electricity, an insulator covering the outside of the conductor, a cable sheath made of an insulator covering the insulator, and a metal coating provided on the outside of the cable sheath. The cable has a plurality of small outer diameter dummy wires arranged outside the cable sheath, and a metal coating wound around the dummy wires and the outside of the cable sheath, and between the cable sheath and the metal coating. A metal-coated cable characterized in that a predetermined space is provided in the. 3. A conductor for transmitting electricity is covered with an insulator, the insulator is covered with a cable sheath made of an insulator, and a plurality of dummy wires having a small outer diameter are arranged outside the cable sheath. A method of manufacturing a metal-coated cable, characterized in that a metal coating is wound around the dummy wire and the cable sheath, and a predetermined space is provided between the cable sheath and the metal coating. 4. The metal-coated cable according to claim 2, wherein at least one of the plurality of small-diameter dummy wires is a strong metal wire. 5. A conductor for transmitting electricity, an insulator covering the outside of the conductor, a cable sheath made of an insulator covering the insulator, a metal coating provided on the outside of the cable sheath, and the cable sheath. A metal-coated cable having a plurality of small outer diameter dummy wires arranged outside the wire and a metal coating wound around the dummy wires and the outside of the cable sheath, wherein the plurality of small outer diameter dummy wires are provided. In a method for constructing a metal-coated cable, wherein at least one of the wires is a strong metal wire, when laying the metal-coated cable, fixing both ends of the metal wire to a support to apply tension to the cable when laying the cable. A method for constructing a metal-coated cable, which is characterized by straightening the bending of a cable. 6. A conductor for transmitting electricity, a cable sheath provided on the outer side of the conductor, and a metal coating provided on the outer side of the cable sheath, wherein a constant distance is provided between the cable sheath and the metal coating. In the method of constructing a metal-coated cable having a space, in the construction of the metal-coated cable, a copper pipe cutter or the like is directed from the outer surface of the position where the outer sheath of the metal coating is desired to be stripped to the metal-coated cable at a right angle. The cable construction method, wherein the blade of the tool is acted to cut and extract only the metal coating with the blade within the space between the metal coating and the cable sheath.