JPH07335277A - Conductor connecting structure for electric wire - Google Patents

Abstract

PURPOSE:To attain practicability of an electric wire provided with a nonmagnetic substance as a tension member, by eliminating deformation or the like of the tension member formed of the nonmagnetic substance and eliminating looseness or the like of a conductor due to this deformation or the like, which can be generated at conductor connecting time of the electric wire, in a conductor connecting structure for the electric wire. CONSTITUTION:In a branch connecting structure for an electric wire 6 formed by providing a tension member 2 in the center part also by arranging conductors 4 in the periphery of the tension member 2, a branch sleeve 8, holding and further compressing a peripheral surface of the conductors 4, is provided, and the tension member 2 is formed of nonmagnetic substance, also to interpose an almost cylindrical pipe 10 between the tension member 2 and the conductors 4. Accordingly, by this pipe 10, the tension member 2 is protected from compression force, and the tension member 2, even when it is formed of, for instance, carbon fiber, alamide fiber, etc., is prevented from being largely deformed when the conductor is connected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductor connecting structure for electric wires, and more particularly to a conductor connecting structure for connecting electric wires in a straight line or branching using a connecting sleeve.

[0002]

2. Description of the Related Art Generally, a twisted steel-cored aluminum core wire (abbreviation: ACSR) having a conductor of aluminum for electrical use is widely used as an electric wire for transmission, an electric wire for distribution, and the like. Figure 10
(A) shows a cross-sectional view of a conventional steel-cored aluminum twisted wire.

Steel core aluminum twisted wire a shown in FIG.
Has a tension member b, such as a galvanized steel wire, located at the center thereof and a plurality of conductors c compression-molded in a fan shape and arranged around the tension member b. This is intended to improve the dynamic strength.

[0004]

However, in this steel cored aluminum twisted wire a, its tension member b is used.
Since is a steel wire, when an alternating current flows through the conductor c,
Iron loss may occur in the tension member b and power loss may occur. Therefore, it is conceivable to use a non-magnetic material such as carbon fiber or aramid fiber as the tension member instead of the steel wire. By introducing such a technique, the problem of iron loss in the tension member is solved. You can

Therefore, in connection with this, various connection sleeves are required even in the linear connection or the branch connection of the electric wire having the non-magnetic tension member. However, if the connecting sleeve used for the steel-cored aluminum twisted wire a is used as it is, as shown in FIG. 10B (in the figure, a branch connection using an E-shaped branch sleeve is shown as an example of the connecting sleeve). When e is compressed by the connection sleeve d, since the compression strength of the carbon fiber or the like is weak, the tension member f made of carbon fiber or the like is largely deformed, or the conductor c is loosened due to this deformation or the like. There is a fear. It should be noted that such a problem can occur without change in branch sleeves other than the E-shaped branch sleeve or straight sleeves.

Therefore, when a non-magnetic material is used as the tension member instead of the steel wire in order to solve the iron loss problem, it is necessary to solve the problem of the conductor connection structure of the electric wire. The present invention has been made in view of the problems associated with the conventional conductor connection structure of an electric wire, and an object thereof is deformation of a tension member made of a non-magnetic material that may occur during conductor connection of an electric wire, It is an object of the present invention to provide a conductor connection structure for an electric wire, which eliminates the loosening of the conductor due to this deformation and the like and enables the practical use of an electric wire provided with a non-magnetic material as a tension member.

[0007]

The present invention has the following constitution in order to achieve the above object. That is, the invention of claim 1 is a conductor connecting structure for an electric wire, comprising a tension member in a central portion and a conductor arranged around the tension member, wherein the outer peripheral surface of the conductor is gripped and compressed. In the one provided with a sleeve, the tension member is made of a non-magnetic material, and a substantially cylindrical protective member is interposed between the tension member and the conductor. It is a structure.

The invention according to claim 2 is the conductor connecting structure for an electric wire according to claim 1, wherein the protective member is integrally formed with the connecting sleeve.

[0009]

According to the invention of claim 1, since the protective member is interposed between the tension member and the conductor, when the connecting sleeve compresses the conductor when connecting the conductor of the electric wire, Since the tension member is protected by the protective member, it is not directly subjected to the compressive force from the conductor. Further, the protective member has a substantially cylindrical shape, and
Since the compressive force transmitted from the conductor to the tension member is absorbed, the compressive force received by the tension member from the inner peripheral surface of the protective member is uniform and small on the outer peripheral surface of the tension member. Therefore, the tension member
Even with a non-magnetic material having a relatively large compression deformation rate, such as carbon fiber or aramid fiber, the tension member does not significantly deform when the conductor is connected.

Further, according to the invention of claim 2, since the protective member is formed integrally with the connecting sleeve, a work step of interposing the protective member between the conductor and the tension member, and the connecting sleeve to the conductor. The work process of crimping can be performed in one process. Moreover, since the protective member is integral with the connecting sleeve, the tension member is stably gripped at the center of the connecting sleeve. Further, the number of parts is reduced by integrally forming the protective member on the connection sleeve.

[0011]

Embodiments of the conductor connecting structure for electric wires according to the present invention will be described below with reference to the drawings. First, the first embodiment will be described. FIG. 1 is a cross-sectional view of a conductor connecting structure for electric wires according to the first embodiment before compression, and FIG. 2 is a cross-sectional view of the conductor connecting structure after compression. FIG. 3 is a perspective view of a branch sleeve according to the conductor connection structure, and FIG. 4 is a perspective view of a branch sleeve according to a modification of the first embodiment.

The first embodiment, as shown in FIG. 1, is a conductor connection structure of a distribution electric wire 6 in which a tension member 2 is provided in a central portion and a conductor 4 is arranged around the tension member 2. A branch sleeve (an example of a connection sleeve) 8 for gripping and compressing the outer peripheral surface of the conductor 4 is provided.

The tension member 2 is a non-magnetic material such as carbon fiber or aramid fiber, and
The conductor 4 is a fan-shaped compression-molded conductor made of electric aluminum and is divided into six along the outer circumference of the tension member 2.

The branch sleeve 8 is a so-called E-shaped branch sleeve as shown in FIG.
C-shaped crimping surface 8a that is crimped to the outer peripheral surface of each of the conductor 4 of FIG.
Also, it has a crimping surface 8b and a partition wall 8c separating the electric wire 6 and the electric wire 12. In the voltage range in which the branch sleeve 8 is used, for example, when the distribution line is targeted, the low voltage is 60
The voltage is 0 (V) or less and the high voltage is 600 (V) to 7.7 (kV).

In the first embodiment, the branch sleeve 8 has a flat plate-like connecting portion 8d having one side portion integrally connected to the crimping surface 8a, and the other side of the connecting portion 8d. Tension member 2 that is integrally provided on the side
And a pipe 10 (an example of a substantially cylindrical protection member) interposed between the conductor 4 and the conductor 4.

The pipe 10 holds the tension member 2 on its inner peripheral surface, and the fan-shaped central corners of the conductors 4 are in contact with the outer peripheral surface thereof, so that the conductor 4 and the tension member 2 are completely separated from each other. To do. The length of the pipe 10 in the longitudinal direction is substantially the same as that of the branch sleeve 8. The connecting portion 8d is arranged so as to be in close contact with the two conductors 4.

According to the first embodiment having the above structure, the tension member 2 is protected from the compression force by the pipe 10 interposed between the tension member 2 and the conductor 4. That is, when connecting the conductor of the electric wire 6,
As shown in FIG. 2, when the crimping surface 8 a of the branch sleeve 8 compresses the outer peripheral surface of the conductor 4, the tension member 2 is protected by the pipe 10, and therefore the compressive force is not directly received from the conductor 4. Further, since the pipe 10 has a cylindrical shape and absorbs the compressive force transmitted from the conductor 4 to the tension member 2, the compressive force received by the tension member 2 from the inner peripheral surface of the pipe 10 is uniform on the outer peripheral surface of the tension member 2. And it will be small. Therefore, the tension member 2 made of carbon fiber, aramid fiber, or the like, which has a relatively high compression deformation rate, is not largely deformed when the conductor is connected.

Therefore, there is no looseness of the conductor 4 due to deformation of the tension member 2 and the conductor connection of the electric wire using the non-magnetic material as the tension member 2 can be performed. As a result, it is possible to put into practical use an electric wire that solves the problem of iron loss.

Further, since the pipe 10 is integrally formed with the branch sleeve 8, a work step of interposing the pipe 10 between the conductor 4 and the tension member 2 and a work step of crimping the branch sleeve 8 to the conductor 4. Can be done at the same time. Therefore, the work efficiency of conductor connection can be improved.
In addition, since the tension member 2 is stably gripped at the center of the branch sleeve 8, the conductor 4 inside the branch sleeve 8 is held.
It is possible to prevent misalignment and deformation. Furthermore, the branch sleeve 8
By integrally forming the pipe 10 on the substrate, the number of parts can be reduced, and the conductor connection can be performed with an inexpensive structure.

In the first embodiment, one connecting portion 8d is provided on the branch sleeve 8. However, in contrast to this,
For example, even if a plurality of branch sleeves 8 are provided with three connecting portions 8d as in the modification shown in FIG. 4, it is within the technical scope of the present invention. In this case, especially the pipe 10
Since the rigidity of the branch sleeve 8 is increased, the strength of the branch sleeve 8 is improved.

Next, a second embodiment will be described. Figure 5
[FIG. 8B] is a transverse cross-sectional view of the electric conductor connecting structure according to the second embodiment after compression. 6A and 6B show a cut pipe according to a modification of the second embodiment, wherein FIG. 6A is a view of the cut pipe viewed from its longitudinal direction, and FIG. 6B is a view of the cut pipe with respect to its longitudinal direction. It is the figure seen from the vertical direction.

As shown in FIG. 5, the second embodiment is a conductor connecting structure having an aluminum pipe 10A which is separate from the branch sleeve 8 in the basic structure of the first embodiment. That is, the branch sleeve 8 has no connecting portion for connecting the pipe 10A, and the single pipe 10A is interposed between the outer peripheral surface of the tension member 2 and the conductor 4. Therefore, according to the second embodiment, similar to the first embodiment, the pipe 10A protects the tension member 2 and the like, and in this case, the internal effect of the electric wire 6 can be simplified. is there. According to the inventors, the pipe 10A has an inner diameter of about 4 mm,
It is considered suitable to have an outer diameter of about 4.2 mm and a length of about 100 to 200 mm.

Further, instead of the pipe 10A, FIG.
Cut pipe 10B as shown in (a) and (b)
May be interposed between the outer peripheral surface of the tension member 2 and the conductor 4. In this case, when connecting the conductors, the slits 1 formed along the longitudinal direction of the cut pipe 10B.
Since 0B1 serves as a relief for the deformation of the cut pipe 10B, the cut pipe 10B is deformed into a circular shape in a cross-sectional view even when receiving a compressive force. Therefore, the cut pipe 10B
The compressive force applied to the outer peripheral surface of the conductor 4 by the inner peripheral surface thereof is made more uniform.

The first embodiment and the second embodiment described above
The embodiment is a preferred embodiment of the conductor connection structure of the present invention, and the technical scope of the present invention is not limited to the first embodiment and the second embodiment. The first and second embodiments are
Although the conductor connection structure uses the E-type branch sleeve, the present invention can be applied to the conductor connection structure using the H-type or C-type branch sleeve, the linear sleeve used for the linear connection, or the like. For example, as in the third embodiment shown in FIGS. 7 to 9, the crimping surface 8 of the linear sleeve 8A having a C-shape in cross section.
The connecting portion 8Ad and the pipe 10 may be integrally formed with A1.

[0025]

As described above, according to the invention of claim 1, even when the tension member is a non-magnetic material such as carbon fiber or aramid fiber, the tension member can be largely deformed when the conductor is connected. Since there is no tension member, it is possible to prevent loosening of the conductor due to deformation of the tension member and the like, which makes it possible to put the electric wire using a non-magnetic material as the tension member into practical use.

According to the invention of claim 2, the work step of interposing the protective member between the conductor and the tension member and the work step of crimping the connection sleeve to the conductor can be performed at the same time. Can be improved. Further, since the tension member is stably gripped at the center of the connection sleeve, it is possible to prevent the conductor from being displaced or deformed in the connection sleeve. Further, since the number of parts is reduced, the conductor connection structure can be constructed at low cost.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a conductor connection structure for an electric wire according to a first embodiment before compression.

FIG. 2 is a transverse cross-sectional view of the conductor connection structure for electric wires according to the first embodiment after compression.

FIG. 3 is a perspective view of a branch sleeve related to the conductor connection structure of the electric wire according to the first embodiment.

FIG. 4 is a perspective view of a branch sleeve according to a modification of the first embodiment.

FIG. 5 is a transverse cross-sectional view of a conductor connection structure for an electric wire according to a second embodiment after compression.

6A and 6B are views showing a cut pipe according to a modification of the second embodiment, wherein FIG. 6A is a view of the cut pipe viewed from its longitudinal direction, and FIG. 6B is a view of the cut pipe in a direction perpendicular to the longitudinal direction. It is the figure seen from.

FIG. 7 is a cross-sectional view of a conductor connection structure for an electric wire according to a third embodiment before compression.

FIG. 8 is a transverse cross-sectional view of a conductor connection structure for electric wires according to a third embodiment after compression.

FIG. 9 is a perspective view of a linear sleeve related to a conductor connection structure for an electric wire according to a third embodiment.

FIG. 10A is a cross-sectional view of a conventional steel-cored aluminum twisted wire, and FIG. 10B is a cross-sectional view of a wire provided with a non-magnetic material as a tension member when a conductor is compressed.

[Explanation of symbols]

 2 Tension member 4 Conductor 6 Electric wire 8 Branch sleeve (an example of connection sleeve) 8d Connection part 8A Linear sleeve (an example of connection sleeve) 8Ad Connection part 10 Pipe (an example of protection member) 10A Pipe (an example of protection member) 10B Cut pipe (Example of protective member)

Claims (2)

[Claims] 1. A conductor connecting structure for an electric wire, comprising: a tension member in a central portion thereof; and a conductor arranged around the tension member, the connecting sleeve holding and compressing an outer peripheral surface of the conductor. The electric conductor connecting structure according to claim 1, wherein the tension member is a non-magnetic material, and a substantially cylindrical protective member is interposed between the tension member and the conductor. 2. The conductor connection structure for an electric wire according to claim 1, wherein the protection member is integrally formed with the connection sleeve.