JPH11214107A - Flexible conductor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible conductor, in which displacement of the layered copper foils can be prevented by simple formation, concerning a flexible conductor which is used in the case that various kinds of electric appliances or the like are conductively connected, or the like, especially a flexible conductor which is composed of layered copper foils, and which has an efficient current- carrying performance by suppressing the temperature rise of the conductor without enlarging a total crosssection area of the conductor and without installing a water cooling means or the like. SOLUTION: The subject conductor has such a characteristic that the circumferential surface of the conductor 1, which is composed by layering a number of flexible thin copper foils, is coated and closely fixed with an insulator 2. As the copper foils, electrolytic copper foils are preferable, and as the insulator 2, for example, a self-fusion type pressure sensitive adhesive tape 2 or the like is used. As the pressure sensitive adhesive tape 2, for example, a tape, which is so composed that an adhesive layer of a butyl rubber or the like is formed on one side of a base martial such as a polyethylene film or the like, can be used. Also, the color of the insulator 2 such as the pressure sensitive adhesive tape 2 or the like is preferably black.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible conductor which is used, for example, in the case of electrically connecting various electric devices and the like, particularly in the case of connecting the connection position so as to be displaceable.

[0002]

2. Description of the Related Art It is known that a plurality of thin copper foils are laminated as a flexible conductor as described above. Although the use of such a thin copper foil is advantageous for enhancing flexibility,
As the thickness becomes thinner, the electric resistance increases and there is a problem that heat is easily generated.

[0003] In addition, mounting holes are generally formed at both ends of a conductor in which a large number of copper foils are laminated as described above, and the conductor is attached to electric equipment with bolts and nuts. It is usually used in a state. Therefore, the laminated copper foil often fluctuates and is difficult to handle.
In addition, the variation increases the contact resistance and causes heat generation.

As described above, when the temperature of the conductor rises due to the heat generated by the conductor, the resistance of the conductor further increases, causing a vicious cycle in which the temperature further rises. Therefore, there is a problem that the amount of current cannot be increased.

In order to solve the above problems, for example, the total cross-sectional area of the entire flexible conductor is increased to reduce the current-carrying resistance, or a method of providing a means for cooling the conductor with water or the like, such as a water-cooled cable, is used. However, if the total cross-sectional area is increased, there are disadvantages such as an increase in size and an increase in weight, and the provision of water cooling means and the like has a problem that the structure becomes complicated and handling becomes complicated.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been proposed in view of the above-mentioned conventional problems. The present invention solves the problem that the laminated copper foil varies with a simple structure, and at the same time, the conductor (copper foil).
It is an object of the present invention to obtain a flexible conductor having good current-carrying performance by suppressing a rise in the temperature of the conductor without increasing the total cross-sectional area and without providing a water cooling means or the like.

[0007]

In order to achieve the above object, a flexible conductor according to the present invention has the following configuration. That is, the present invention is characterized in that an outer peripheral surface of a conductor formed by laminating a large number of thin copper foils having flexibility is coated with an adhesive tape and is closely fixed thereto.

[0008]

As described above, an adhesive tape is coated on the outer peripheral surface of a conductor in which a large number of copper foils are laminated, and is closely adhered and fixed.
While preventing the laminated copper foil from scattering,
The heat generated at the time of energization is favorably absorbed and dissipated via the adhesive tape covering the outer peripheral surface of the conductor (copper foil), so that the temperature rise can be suppressed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a flexible conductor according to the present invention will be described.
A specific description will be given based on the embodiment shown in the drawings. FIG.
1A is a plan view showing an embodiment of a flexible conductor according to the present invention, FIG. 2B is a front view thereof, and FIG.
2A is an enlarged cross-sectional side view taken along the line AA, and FIG. 2B is an enlarged front view of a part of the furniture flexible conductor. In the figure, reference numeral 1 denotes a conductor in which a large number of copper foils 11 are laminated, and 2 denotes an insulator covering the outer peripheral surface of the conductor 1. In this embodiment, an adhesive tape is used.

The copper foil 11 constituting the conductor 1 is as follows.
Preferably, an electrolytic copper foil is used because a uniform thickness is obtained, and its lamination structure, shape, dimensions, etc. are appropriate. In the present embodiment, as shown in FIG. A generally strip-shaped conductor 1 is formed by crushing a thin electrolytic copper foil 11 wound in a roll into a flat shape. The conductor 1 may be formed by laminating a plurality of strip-shaped copper foils in advance. The external dimensions and the like of the conductor 1 may be appropriately set according to the purpose of use and the like.

A mounting hole 10 is formed in a connecting portion 1a to the electric device formed at both ends in the longitudinal direction of the conductor 1 shown in FIG. 1 and the outer peripheral surface of the central portion of the conductor 1 excluding the connecting portion 1a is provided with the insulating hole. An adhesive tape 2 as a body is covered. The adhesive tape 2 may be a so-called adhesive tape,
Also preferably, a so-called self-fusion type is used. The material and the configuration of the adhesive tape 2 are appropriate. For example, as shown in FIG. 2A, a base material 21 such as a polyethylene film has an adhesive layer 22 such as butyl rubber on one surface.
An adhesive tape having a layer structure can be used. Further, the color of the insulator such as the adhesive tape 2 or the like is arbitrary, but if a black one is used, heat absorbing and releasing properties are good and advantageous.

As a method of sticking the adhesive tape, in the embodiment of FIG. 2A, one wide tape 2 is folded in two and the conductor 2 is sandwiched between the two tapes. As shown in (a), two tapes 2 and 2 may be adhered to each other from both upper and lower sides of the conductor 1 or may be wound around the conductor 1 as shown in FIG. You may.

Further, the connecting portion 1a of the conductor 1 is shown in FIG.
A plurality of branches may be provided at one end as shown in FIG. 6A or at both ends as shown in FIG. 6B, and the lengths of the branched connecting portions 1a are different from each other as shown in FIG. You may do so. Further, the means for forming these branch connection portions is appropriate. For example, in the case of branching only at one end side as shown in FIG. 5 (a), for example, it is flatly wound as shown in FIG. The conductor is bent as shown in FIG. 7A, and an adhesive tape 2 is adhered to the outer peripheral surface thereof. FIG. 5 (b)
As shown in FIG. 7 (b), in the case where the both ends are branched into a plurality of pieces as in the above, a plurality of flatly wound conductors are stacked as shown in FIG. 7 (b), and the adhesive tape 2 is attached to the outer peripheral surface thereof. Good.

In each of the above embodiments, an adhesive tape is used as the insulator. However, a flexible insulator can be coated on the peripheral surface of the conductor by, for example, molding a synthetic resin.

[0015]

[Example 1] 0.035m thick conductor 1
As shown in FIG. 3, an electrolytic copper foil having a thickness of m is wound 10 times in a roll shape as shown in FIG. 3 and crushed into a flat strip shape. A flexible conductor was made. The length of the conductor 1 formed in the shape of a flat strip is about 125 mm, the width is about 20 mm, and the thickness is 0.7 m.
m. As the pressure-sensitive adhesive tape 2, FUKO TAPE No. 2 (trade name; manufactured by Furukawa Electric Co., Ltd.) having a pressure-sensitive adhesive layer 22 made of butyl rubber on one surface of a substrate 21 made of a polyethylene film was used.

An energization test as described below was performed using the above flexible conductor. That is, when the current value that can flow before the flexible conductor rises by 40 ° C. was examined,
It was able to flow up to 6A.

[Comparative Example 1] As Comparative Example 1 with respect to the above-mentioned Example 1, the same flexible conductor as that of the above-mentioned Example 1 was applied to the adhesive tape 2.
Was carried out without sticking, the current value that could be passed before the conductor rose by 40 ° C. was about 100 A.

As is clear from the above results, even when using the same shape conductor in which the same copper foil is laminated, by covering the conductor peripheral surface with an adhesive tape, it is possible to prevent the dispersion of the copper foil only. Rather, heat dissipation is improved, and a larger current can flow.

[0019]

As described above, in the flexible conductor according to the present invention, the copper foil is prevented from dispersing by covering and fixing the conductor tape 1 on which a large number of copper foils are laminated as described above. In addition to this, the heat generated at the time of energization is released to the outside air via the adhesive tape 2, and the temperature rise of the conductor 1 can be suppressed well. In particular, when a self-fusion type adhesive tape is used, the adhesiveness to the conductor is good, and the heat of the copper foil can be efficiently absorbed and released. As a result, for example, even when the same conductor is used, there is an effect that the amount of electricity can be increased only by covering the adhesive tape.

[Brief description of the drawings]

FIG. 1A is a plan view showing an embodiment of a flexible conductor according to the present invention. (B) is the front view.

FIG. 2A is an enlarged cross-sectional side view taken along line AA in FIG. 1A. (B) is an enlarged front view of a part of the flexible conductor.

FIG. 3 is an enlarged front view in which an intermediate portion of the flexible conductor is omitted.

FIG. 4A is an enlarged side view showing another example of sticking an adhesive tape to a conductor. (B) is an enlarged front view showing still another example of sticking an adhesive tape to a conductor.

FIG. 5A is a front view of an example in which a connection portion at one end of a conductor is branched into a plurality of portions. (B) is the same figure of the example which branched the connection part of both ends of a conductor into a plurality.

FIG. 6 is a front view of a part of an example in which the lengths of branched conductor ends are different.

FIGS. 7A and 7B are schematic diagrams showing a configuration example of a flexible conductor having a branched connection portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conductor 1a Connection part 11 Copper foil 10 Mounting hole 2 Insulator (adhesive tape) 21 Base material 22 Adhesive layer

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kunio Oya 2-10-10 Okano, Nishi-ku, Yokohama-shi, Kanagawa Prefecture Inoue Manufacturing Co., Ltd.

Claims (6)

[Claims] 1. A flexible conductor comprising: a conductor formed by laminating a plurality of thin copper foils having flexibility; 2. The flexible conductor according to claim 1, wherein said copper foil is an electrolytic copper foil. 3. The flexible conductor according to claim 1, wherein the copper foil is formed by flattening a roll wound in a roll shape. 4. The flexible conductor according to claim 1, wherein the insulator is a self-adhesive adhesive tape. 5. The flexible conductor according to claim 4, wherein the adhesive tape has an adhesive layer such as butyl rubber formed on one surface of a base material such as a polyethylene film. 6. The flexible conductor according to claim 1, wherein the insulator or the adhesive tape is black.