JPS647469B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of filling an aluminum wire in an anti-laughing type retaining clamp so that when an aluminum sleeve is compressed, a gap is not formed in the step-stripped portion of the aluminum wire due to the wire elongation.

When connecting steel-core stranded wires using a connecting tube, in a normal clamp, for example, compression connection is made from the clamped side of the steel core to the stranded wire side; Laughter is a phenomenon in which the outer periphery bulges due to loosening of the twist of the stranded wire near the mouth, which occurs. To prevent this, in the laughter prevention retention clamp, compression connection is made from the stranded wire side toward the clamping part of the steel core. A decompression method is used. According to this, the elongation of the stranded wire is greater than the elongation of the steel core, and therefore, the ends of the stranded wire extend toward the clamp portion of the steel core.

When compressing and connecting the aluminum sleeve 1, which is a laughing prevention type that is a reverse compression type, it is compressed from the side of the aluminum wire 3, which is a twisted wire, as described above, but since the twisted wire stretches as described above. , before compression, as shown in FIG.
A gap g corresponding to the elongation of the wire is provided, and this gap g must be filled in as shown in Figure 2 due to the elongation of the wire after the pressure wire is finished. Design and place it.

However, during actual construction, the exposed length of the steel core wire 5 is not uniform, so it is too long, and after the steel clamp 2 is compressed, the stepped exposed portion 4 and the steel clamp 2 are separated from each other as shown in FIG. The gap between the two steel clamps becomes g′>g, and after compression, the steel clamp 2
In many cases, a gap g'-g remains between the stepped part 4 and the stepped part 4.

This invention was made in view of the above circumstances, and when steel clamps are connected so that a gap g' larger than the regular dimension g is created,
The purpose is to correct this and provide a void filling method that does not leave any gaps after compression.
In the gap before compression, a gauge to determine the regular gap g is placed on the steel core wire, and in the remaining extra gap, filler rings are fitted over the steel core wire according to the size of the gap, and compression is performed. It is a feature.

That is, once the compression of the steel clamp 2 is finished,
This part is covered with an aluminum sleeve, but before that, as shown in Fig. 5, using a gauge 6 with a regular gap g,
In the gap between the end face 2a of the aluminum wire and the stepped aluminum wire stripped part 4, the gauge 6 is placed on the steel core wire 5 so as to be in contact with the end face 2a. As shown in the figure, a filler member, that is, a solid material, for example, in this embodiment, filler rings 7 are used in an appropriate number according to the size of the gap so that the gap is filled, and the filler ring 7 is placed on the steel core wire 5.
Insert. Although the filling ring 7 can have any suitable shape, it is convenient to provide a slit 8 in the radial direction as shown in FIG. 7, so that it can be fitted onto the steel core wire. Note that the filling member is not limited to the filling ring described above.

The gauge thus determines the number of filler rings required, and after using the required number of filler rings, the aluminum sleeve is brought over the steel clamp and the aluminum wire and compressed.

In this way, the gap after compression will be completely filled by the filling ring. In this way, complete compression can be ensured in the anti-laughing mode.

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional view showing the state before compression of a compressed part with a normal gap g, Fig. 2 is a partial cross-sectional view showing the state after compression, and Fig. 3 is a partial cross-sectional view showing the state after compression of a compressed part with a gap g' larger than the normal one. FIG. 4 is a partial sectional view showing the state in which a gap remains after compression; FIG. 5 is a diagram showing the state in which a gauge is applied during the method of this invention; FIG. FIG. 7 is a cross-sectional view showing a stage in which the ring is fitted, and FIG. 7 is a front view showing an example of the filling ring. 1... Aluminum sleeve, 2... Steel clamp, 3... Aluminum wire, 4... Step stripped part, 5... Steel core wire, 6... Gauge, 7... Filling ring, 8... Slit.

Claims (1)

[Claims] 1 After compressing and fixing the steel core wire to the steel clamp, apply a gauge with the width of the regular gap g to the end of the steel clamp of the stepped aluminum wire part, and fill the remaining extra gap with a filling material according to the size of the gap. Fitted onto the core wire,
After that, the aluminum sleeve is compressed from the aluminum wire side to the steel clamp side.