JPS6219032B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an expanded steel core aluminum stranded wire (hereinafter referred to as
(abbreviated as EACSR).

As shown in Fig. 1, EACSR consists of a steel core 1 made of stranded steel wires, a spacer 2 made of a plurality of aluminum wires wound around it in a rough spiral shape, and a
It is constructed by twisting a layer or multiple layers of aluminum wire 3 together in a ring shape.

When such an EACSR is compressed and connected via a compression connecting pipe, the compressive force between the steel core 1 and the aluminum stranded wire 3 decreases, and sufficient connection characteristics cannot be obtained. Moreover, since the spacer 2 is twisted at a specific pitch like a steel core or aluminum stranded wire,
It is impossible to easily fill the helical gap between the steel core 1, the aluminum strands 3, and the spacer 2.

In the present invention, a filling wire formed to match the spiral shape of the spacer and having a smaller diameter than the spacer is inserted along the spacer for a predetermined length into the gap defined by the steel core, the aluminum stranded wire, and the spacer. The above-mentioned drawbacks associated with compression connections are avoided by encasing the compression connection tube therein and then compressing it with an angular compression die having a diagonal smaller than the outside diameter of the connection tube. .

An embodiment of the present invention will be described below. In FIG. 2, parts corresponding to those in FIG. 1 are given the same reference numerals. Here, in order to make the diagram easier to understand, only one aluminum wire of the spacer 2 is shown. For connection, the aluminum strands 3 are stripped in steps by a specific axial length, leaving the steel core 1 intact. Then, using another aluminum wire 4 formed to match the spiral shape of the spacer 2 and having a smaller diameter than the spacer 2 as a filling wire, the steel core 1, the aluminum stranded wire 3, and the spacer 2 are connected for a predetermined length along the spacer 2. Insert into the helical cavity defined by. In order to insert the filling wire 4, the filling wire 4 has a smaller diameter than the spacer 2 and is molded to match the spiral shape of the spacer 2, so if the filling wire 4 is screwed in, it can be easily inserted into the spiral gap. can do. After inserting the filling wire 4 to the length of the compression part,
The compression connecting pipe 5, for example a straight sleeve, the sleeve part of a retaining clamp, etc., is wrapped around this, and then, as shown in FIG. With die 6, compression is performed.

Therefore, after compression, the shape is shown by the chain line in FIG.

Note that the filling line is not limited to the one shown in this embodiment, and may have a cross section similar to the cross section of the gap, for example, a fan-shaped cross section.

As described above, according to the present invention, it is possible to easily fill the helical gap between the steel core, the aluminum stranded wire, and the spacer, which facilitates compression, and also allows the diagonal space smaller than the outer diameter of the sleeve to be filled. Since compression is performed using a square compression die, a compression joint with good connection characteristics can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of EACSR, FIG. 2 is a side view of an embodiment of the present invention, and FIG. 3 is a diagram illustrating compression using a die. 1...Steel core, 2...Spacer, 3...Aluminum stranded wire, 4...Filled wire, 5...Compression connection pipe.

Claims (1)

[Claims] 1 Expanded steel core aluminum stranded wire consisting of aluminum stranded wire twisted into a ring through a spacer that is wound around a steel core in a rough spiral shape,
When compressing and connecting this through a compression connection pipe that covers this, a filling wire formed to match the spiral shape of the spacer and having a smaller diameter than the spacer is connected to the steel core, aluminum stranded wire, and spacer along the spacer. It is characterized by inserting a predetermined length into the defined gap in the axial direction, then enveloping the compression connection pipe, and then performing the compression connection using an angular compression die having a diagonal smaller than the outer diameter of the compression connection pipe. and
Compression connection method for expanded steel core aluminum stranded wire.