JPH0547423A - Compression connecting portion for twisted electric wire - Google Patents

Abstract

PURPOSE:To connect a steel sleeve to the center layer of a twisted electric wire without a crash or crack of the center layer incorporating a resin-mixed fiber element wire where carbon fiber of the twisted electric wire and a resin are mixed. CONSTITUTION:In a compression connecting portion 10 of a twisted electric wire 12, the center layer 26 of the twisted electric wire 12 is covered with a steel sleeve 16 integrally extending from an anchor clamp 14, followed by press-fitting connection. The steel sleeve 16 is compressed through a soft metal buffer layer 34 formed on the center layer 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compression connection for interconnecting twisted wires suitable for use as a conductor of an overhead wire or a compression connection for connecting this twisted wire to a steel clamp. It is about improvement.

[0002]

2. Description of the Related Art The present applicant has previously proposed a stranded electric wire having a central layer containing a carbon fiber which is relatively lightweight and has a small coefficient of thermal expansion and a low degree of sag (Japanese Patent Application No. Hei. 2-201171). This stranded wire has 1
An element wire formed by compounding a hard steel wire having a cross-sectional area ratio of 0 to 40% and a carbon fiber having the remaining cross-sectional area ratio with a resin, or a center layer formed by twisting these wires, and this center layer And a conductive metal wire formed by being twisted on top of each other. Since this twisted wire contains a hard steel wire in the center layer, even if the wire is exposed to an arc and the resin disappears, the tension can be taken up by the hard steel wire, causing a disconnection. Moreover, since the cross-sectional area ratio of the hard steel wire is 10 to 40%, it is advantageous because it does not hinder the weight reduction and the thermal expansion coefficient does not increase. It should be noted that a center layer having a center line of a hard steel wire and a resin composite fiber element wire that is twisted on the center line and formed by compounding carbon fiber with a resin, and is twisted on the center layer. It can also be achieved by a stranded electric wire composed of a conductive metal wire.

[0003]

However, when connecting this prior art stranded wire to other similar stranded wires or clamps, like the compression joints of the prior art, the central layer of both wires is When the steel sleeve that is provided over the wire or the steel clamp that covers the center layer of the stranded wire is directly compressed and connected, the portion of the carbon fiber in the center layer that is composited with resin is compressed by the strong compression force of the steel sleeve. There is a drawback that the center layer is damaged, and the center layer is crushed, cracked, or cracked, so that the gripping force of the steel sleeve is reduced.

It is an object of the invention to avoid the above-mentioned drawbacks and to allow a steel sleeve to be connected to the center layer of a stranded wire without the core layer being crushed, cracked or cracked. To provide a compression connection for the wire.

[0005]

One of the means for solving the problems of the present invention is to form a hard steel wire having a cross-sectional area ratio of 10 to 40% and a carbon fiber having the remaining cross-sectional area ratio with a resin. Or a similar twisted wire or the like in the center layer of a twisted wire consisting of a twisted element wire or a center layer formed by twisting these and a conductive metal wire twisted on the center layer A compression connection part of a stranded electric wire formed by compression-connecting a steel clamp with a steel sleeve, wherein the steel sleeve is compression-connected through a metal buffer layer provided on a center layer. It is to provide a compression connection part of a stranded electric wire.

Another means for solving the problems of the present invention is 10 to 40.
% Center area of a hard steel wire having a cross-sectional area ratio and a resin composite fiber element wire formed on the center line by resin-compositing carbon fibers having the remaining cross-sectional area ratio And other similar twisted wires or steel clamps compression-connected with steel sleeves to the center layer of a twisted wire consisting of and a conductive metal wire twisted on this center layer The center line of the center layer and the resin composite fiber element wire are stripped off, the steel sleeve is directly compression connected to the center line, and the resin composite fiber element wire is compression connected via the metal buffer layer. Another object of the present invention is to provide a compression connection portion of a stranded electric wire.

[0007]

As described above, since the portion having the carbon fiber compounded with the resin is compression-connected with the steel sleeve through the metal buffer layer, the surface added to the portion having the carbon fiber compounded with the resin. Since the pressure drops,
The center layer is not crushed, cracked or cracked, so that the gripping force of the wire interconnections or the steel sleeve connecting the wire and the steel clamp is not reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described in detail. FIGS. 1 and 2 show a compression connecting portion 10 of a stranded electric wire according to the present invention. The compression connecting portion 10 of FIG. A steel sleeve 1 extending integrally with a clamp 14 for a twisted wire 12
6 shows the case where 6 is connected, and the compression connection part 10 of FIG.
Shows a case where another similar twisted wire 12 ′ is connected to the twisted wire 12 with a steel sleeve 18 for connection.

The twisted wires 12, 12 'are shown in FIGS.
As shown in FIG. 5, a center layer 26 made of a wire material obtained by hardening a hard steel wire having a cross-sectional area ratio of 10 to 40% and a carbon fiber having the remaining cross-sectional area ratio with a resin, and a conductive layer twisted around the central layer 26. It consists of a metal wire 28. In the embodiment shown in FIG. 5, the center layer 26 is made of a steel wire-containing resin composite fiber element wire 24 formed by compounding a plurality of hard steel wires 20 and a plurality of carbon fibers 22 with a resin, and FIG. In the embodiment, the center layer 26 is made of a steel wire-containing resin composite fiber element wire 24 formed by strengthening one hard steel wire 20 and a plurality of carbon fibers arranged around it with a resin. There is. Further, in the embodiment of FIG. 7, the center layer 26 is composed of a single piece of the hard steel wire 20 or a twisted wire thereof and a resin composite fiber element wire 30 formed thereon by compounding carbon fiber with resin. ing. Further, in the embodiment of FIG. 8, the center layer 26 is formed by arranging a plurality of aggregated hard steel wires as a center line 32 and disposing a plurality of carbon fibers 22 on the center line 32 and reinforced with a resin. Has been done.

In the compression connection portion 10 of the stranded electric wire of the present invention, as shown in FIGS. 1 and 2, the center layer 26 has the steel sleeve 1 with the metal buffer layer 34 provided thereon.
It is compression-connected by 6 or 18. The metal buffer layer 34 is made of, for example, a soft metal sleeve such as an aluminum sleeve.
As shown in FIG. 3, it may be formed by winding a soft aluminum wire.

Thus, the central layer 26 of the twisted electric wire 12
When the steel sleeve is compressed through the metal buffer layer 34,
Since the surface pressure applied to the resin composite fiber strand 24 (see FIGS. 5 and 6) or the resin composite fiber strand 30 (see FIGS. 7 and 8) containing the steel wire in the center layer 26 is reduced, the center layer 26 is reduced. Is not crushed, the center layer 26 is not cracked, and the center layer 26 is not cracked.

FIG. 4 shows a compression connection 10 of a twisted wire according to another embodiment of the invention, in which the twisted wire 12 is of the form shown in FIG. Connected to wire 12 is shown to be a retaining clamp 14 ', which is substantially similar to FIG. Stranded wire 1
2 and the center line 32 of the center layer 26 and the resin composite fiber strand 2
The steel sleeve 16 ′, which is integrally peeled from the retaining clamp 14 ′, is directly compression connected to the center line 32, and the metal buffer layer 3 is attached to the resin composite fiber strand 28.
It is compression-connected via 4. The metal buffer layer 34 used in this embodiment has a through hole 36 through which the center line 32 passes.
It comprises a sleeve 36 of crowned soft aluminum having a.

Also in this embodiment, the steel sleeve 16 'is directly compression connected to the hard center line 32 of the center layer 26 of the twisted electric wire 12, but the resin composite fiber element wire 3 thereon is used.
Since the steel sleeve 16 ′ is compression-connected to 0 through the metal buffer layer 34, the surface pressure applied to the resin composite fiber strand 30 (see FIG. 8) in the center layer 26 is reduced, so that the center layer 26 is not crushed, and the center layer 26 is not cracked or cracked.

[0014]

According to the present invention, as described above, since the portion having the resin composite fiber strand is compression-connected with the steel sleeve through the metal buffer layer, the portion having the resin composite fiber strand is connected to the portion having the resin composite fiber strand. The applied surface pressure is reduced so that the center layer does not collapse, crack or crack, thus gripping the steel sleeve that connects the wires to each other or between the wires and the retention clamp. Power does not decrease.

[Brief description of drawings]

FIG. 1 is a side view showing a part of an embodiment of a compression connection portion of a stranded electric wire according to the present invention in section.

FIG. 2 is a cross-sectional view of another embodiment of the compression connection portion of the stranded electric wire according to the present invention.

FIG. 3 is a side view showing a different example of the metal buffer layer used in the present invention.

FIG. 4 is a side view showing in section a part of still another embodiment of the compression connection portion of the twisted electric wire according to the invention.

FIG. 5 is a cross-sectional view of one example of a stranded electric wire to which the present invention is applied.

FIG. 6 is a cross-sectional view of another example of a twisted electric wire to which the present invention is applied.

FIG. 7 is a cross-sectional view of still another example of a stranded electric wire to which the present invention is applied.

FIG. 8 is a cross-sectional view of yet another example of a stranded electric wire to which the present invention is applied.

[Explanation of symbols]

 10 Compression Connection Part of Twisted Electric Wire 12 Twisted Electric Wire 14 Holding Clamp 16 Steel Sleeve 18 Steel Sleeve 20 Hard Steel Wire 22 Carbon Fiber 24 Resin Composite Fiber Element Wire with Steel Wire 26 Center Layer 28 Conductive Metal Wire 30 Resin Composite Fiber Strand 32 Center line 34 Metal buffer layer 36 Sleeve

Claims (2)

[Claims] 1. An element wire formed by compounding a hard steel wire having a cross-sectional area ratio of 10 to 40% and a carbon fiber having the remaining cross-sectional area ratio with a resin, or a center formed by twisting them. Layer and a conductive metal wire twisted on the center layer to form a twisted wire formed by compressing and connecting another similar twisted wire or clamp to the center layer through a steel sleeve. The compression connection part of the twisted wire according to claim 1, wherein the steel sleeve is compression-connected via a metal buffer layer provided on the center layer. 2. A resin composite formed by compounding a center line of a hard steel wire having a cross-sectional area ratio of 10 to 40% and a carbon fiber provided on the center line and having the remaining cross-sectional area ratio with a resin. Another similar twisted wire or clamp is compression-connected with a steel sleeve to the center layer of a twisted wire consisting of a center layer having fiber strands and conductive metal wires twisted on the center layer. In the compression connection portion of the twisted electric wire, the center line of the center layer and the resin composite fiber element wire are stripped off, the steel sleeve is directly compression connected to the center line, and the resin composite fiber element A compression connection part of a stranded electric wire, which is compression-connected to the wire via a metal buffer layer.