JPH056544U - Electrical wire - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an electric wire that prevents the occurrence of the skin effect, increases the power transport efficiency, reduces the manufacturing cost, and improves the bending performance. [Structure] A plurality of conducting wires 1 are provided close to the inner wall of the insulating jacket 11.
2 is arranged in a circle, the central portion is hollow, and the hollow central portion is provided with a coil spring 13 that is inscribed in the conductor. Instead of the coil spring, the flexible material 14 was filled in the hollow central portion. The conductor wire was used as a bare wire and was embedded in the insulating jacket, and a coil spring inscribed in the insulating jacket was provided in the hollow central portion or the flexible material was enhanced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to an electric wire or a power cable (collectively referred to as an electric wire in this specification). It

[0002]

[Prior art]

  Conventional electric wires are constructed by covering one or more stranded wires with an insulating jacket. . A stranded wire is formed by twisting strands together, and an electric wire is made up of multiple stranded wires. Completely intimately intertwined with each other, they are constructed by focusing in a circle, and the conductors are electrically charged. The entire cross section of the wire is filled to form a conductive path that carries power.

[0003]   By the way, when an alternating current flows through the conductor, a skin effect occurs. This current table Due to the skin effect, the safe current amount (conductivity) per unit area of the cross section of the wire is Inversely proportional to cross-sectional area. That is, the effective passage of current in the wire is Limited to a few strands close to the wall, other strands, i.e. jackets The stranded wire far from the wire hardly functions as a current flow path, and only a small amount of current flows. It doesn't flow.

[0004]   Therefore, the conventional electric wire has low power transfer efficiency, high manufacturing cost, and It is an economy. Also, since the entire cross section of the wire is filled with conductors, the bending performance is low. , The diameter of the wire winding drum cannot be reduced, and handling during wiring work is not easy . There were drawbacks such as.

[0005]   In view of the above points, the present invention prevents the occurrence of the skin effect and increases the power transportation efficiency. The purpose of this is to provide an electric wire with improved manufacturing cost and reduced bending cost. And

[0006]

[Means for Solving the Problems]   In order to achieve the above-mentioned object, the electric wire according to the present invention comprises a plurality of conductor wires and these wires. An insulating jacket covering the enclosure, and the conductor wire is arranged in a circle in the vicinity of the inner wall of the insulating jacket. The central part is hollow, and a coil spring inscribed in all conductors is installed in the central part. It is characterized by.

[0007]   In addition, the center part is filled with a flexible material such as string, linen, cotton, and foam material. I am trying.

[0008]   Further, it is characterized in that the conductor wire is a bare wire and is embedded in the insulating jacket.

[0009]

[Action]

  Since the conductors are arranged in a circle and have an air gap in the center, it can be used during power transfer. In addition, the skin effect does not occur. Therefore, the current flows evenly through each conductor and the unit disconnection The current density per area is large.   In addition, since the hollow part is equipped with a coil spring, it can be easily moved in any direction when external force is applied. When it bends and its external force is removed, it easily restores.

[0010]   Similarly, when a flexible material is filled in the hollow part, it is bent in any direction by external force. However, even if the external force is removed, it can be maintained as it is.

[0011]   When the conductor is embedded in the insulating jacket, the jacket and the conductor are not separated from each other.

[0012]

【Example】

  Next, an embodiment of the present invention will be described with reference to the drawings.

[0013]   The electric wire 10A of the first embodiment shown in FIG. 1 has a large number near the inner wall surface of the insulating jacket 11. The conductor wire 12 of the strip is arranged in a circle, and a hollow portion is formed in the center thereof, and a hollow portion is formed in the hollow portion. The il spring 13 is provided so as to be inscribed in each of the lead wires 12, and is configured.

[0014]   The insulating jacket 11 is made of vinyl, polyethylene or other known insulating material. The conductor wire 12 is a bare stranded wire such as a copper wire, a steel wire, an aluminum wire, or the like. It is an insulated wire whose periphery is covered with an insulating tape. Inscribe the coil spring 13 in the conductor 12. By doing so, the circular arrangement of the conductors is maintained. Carry multiple conductors By matching the outer circumference of the coil spring, the coil spring and the conductor are integrated, It is also possible to prevent mutual separation. If necessary, join the conductor and coil spring. May be. When using a bare wire for the conducting wire, the coil spring 13 should be an insulating one or a rigid one. If steel is used to secure the property, cover the area with an insulating sheet. It is good to use.

[0015]   The electric wire 10B of the second embodiment shown in FIG. 2 has a large number of conductors near the inner wall of the insulating jacket 11. 12 are arranged in a circle to make the center hollow, and the hollow has an insulating property. The flexible material 14 such as a linen, a cloth such as cotton, a string, or a foam material is enriched.

[0016]   An electric wire 10C of the third embodiment shown in FIG. 3 has an insulating jacket 11 formed to have a thick wall, and A large number of conductor wires 12 are circularly arranged and embedded in the insulating jacket. That In addition, the central portion of the insulating jacket is made hollow, and the coil sheath 13 is provided in the hollow portion. It Also in the case of this embodiment, instead of the coil spring, the flexible material should be enhanced. You may.

[0017]   Each of the electric wires 10A, 10B, and 10C of the above-described embodiments is a conductor wire that is a conductor. 12 is arranged in a circular shape in the vicinity of the inner wall surface of the insulating jacket 11 or in the insulating jacket, and First of all, since it has no conductor, In this case, the skin effect does not occur. Therefore, the safe current per unit area of the wire cross section Can be significantly increased over the conventional case. That is, the power transfer efficiency of the electric wire Can be greatly improved. Second, it has no conductor in the center, And the manufacturing cost is reduced.

[0018]   In addition, even if each wire has a coil spring in the hollow portion, it is filled with a flexible material. Even if it is used, the drum diameter can be easily bent in any direction. Can also be made smaller, resulting in lower transportation costs and wiring work in a narrow area Is easy.

[0019]   Furthermore, in the case of the embodiment shown in FIG. 3, as shown in FIG. From the lead wire 12, and the coil spring 13 is cut off, and the end of the lead wire is If it is joined to the child 15 by crimping or other method, it can be easily drawn into the electric wire piping. And the utility of the electric wire is further improved.

[0020]

[Effect of device]

  As described above, according to the present invention, the conductors are arranged in a circle, and the conductors are provided at the center. Since there is no skin effect, the power transfer efficiency is increased and Since the conductor material is saved, the manufacturing cost is low. Also, coil in the center Bending performance is improved because it is equipped with springs or is filled with insulating flexible material. And wiring is easy.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment.

FIG. 2 is a sectional view of a second embodiment.

FIG. 3 is a sectional view of a third embodiment.

FIG. 4 is a partial sectional side view showing a further improved example of the third embodiment.

[Explanation of symbols]

10A, 10B, 10C electric wire 11 Insulation jacket 12 conductors 13 Coil spring 14 Flexible material 15 terminals

Claims (4)

[Scope of utility model registration request] 1. A plurality of conductors are arranged in a circle in the vicinity of an inner wall of an insulating jacket, a central portion is made hollow, and a coil spring inscribed in the conductor is provided in the hollow portion. Electrical wire. 2. An electric wire characterized in that a plurality of conducting wires are circularly arranged near the inner wall of an insulating jacket, the central portion is hollow, and the hollow portion is filled with a flexible substance. 3. A plurality of conductors are embedded in a circular shape in an insulating jacket, a central portion is hollow, a coil spring is inscribed in the hollow portion, or a flexible material is enriched. Electrical wire. 4. The electric wire according to claim 3, wherein the conductor wire is a bare wire.