JP2000057852A - Multilayered hollow compressed stranded wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the hollow center part of a stranded wire or wires assembled in the hollow part from being affected by compression from an outer layer, with a compressed stranded wire having an outer peripheral surface excellent in roundness and smoothness and composed of plural layers. SOLUTION: In this stranded wire, a hollow part 4 is formed by arranging a plurality of strands 3 on the same circumference and passing the strands 3 through a compression dice and a plurality of new strands 7 arranged on the same circumference in the hollow part 4 is passed through the compression dice, so that a hollow part 8 having no center wire is formed comprising a plurality of layers. Or, wires can be assembled into the formed hollow part 8 without being affected by compression from the outer layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stranded wire mainly used for electric wires and the like.

[0002]

2. Description of the Related Art Conventionally, a twisted wire having a center line 22 as shown in FIGS.
Are gathered, the surface of the stranded wire formed by the plurality of strands 21 becomes uneven, which impairs roundness and smoothness. In addition, since it has a center line, it is impossible to insert or pass something into the hollow portion as in the invention.

[0003] In the case of a hollow compression stranded wire formed of a single layer as shown in Fig. 2, there is a limit to the number of strands in forming a stranded wire. The cross-sectional area is restricted.

[0004]

Generally, in the case of a multi-core stranded wire, large irregularities occur on the outer surface of the stranded wire, and the roundness and smoothness of the surface are impaired. As a result, the thickness of the coating material is reduced. At the same time it is difficult to make
In addition, there is a problem that the conductor is cut when the coating material is stripped.

[0005] In the case of a single-layer hollow compression twisted wire, although the above-mentioned problems can be solved, the number of strands and the diameter of the strand are limited in forming the twisted wire. A new problem arises.

Accordingly, an object of the present invention is to provide a stranded wire having a round and smooth surface and a large conductor cross-sectional area.

[0007]

Means for Solving the Problems The present invention solves the above-mentioned problems. According to the first aspect of the present invention, a plurality of strands are arranged on the same circumference to form a first layer of hollow compression twist. While making a line,
This is a multilayer hollow compression twisted wire forming a second layer of hollow compression twisted wire in which a plurality of new wires are arranged on the same circumference in the formed hollow portion.

According to a second aspect of the present invention, the physical properties of the multilayer hollow compression stranded wire are improved by incorporating a wire of the same material or a different material from the multilayer wire into the formed hollow portion.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a multi-layer hollow compression stranded wire according to the present invention will be described with reference to FIGS. 1, 2 and 3. FIG.

In FIG. 2, reference numeral 4 denotes an arrangement in which the first-layer strands 2 equally divided by the perforated plate 9 of FIG. 3 are arranged on the same circumference, and a plurality of strands 3 are twisted in one direction X. It is a hollow portion of the first-layer hollow compression stranded wire 1 formed by passing through a compression die 11 installed in a wire concentrating port 10 while the wire is being drawn.

In FIG. 1, reference numeral 8 denotes a second-layer elementary wire 6 arranged on the same circumference in the hollow portion 4 of FIG. 2 formed by the first-layer hollow compression stranded wire 1; In the hollow portion of the second-layer hollow compression stranded wire 5 formed by dividing the plurality of strands 7 equally by the eye plate 9, passing through the compression die 11 and twisting in the same direction X as the first layer. is there.

The multi-layer hollow compression stranded wire of this embodiment is made of tin-plated soft copper wire and has a wire diameter of 0.180 mm. The number of strands in the first layer is 20, the number of strands in the second layer is 14, twist pitch 8.2 mm, twist direction right, compression die diameter 1.174 mmφ
It is composed of

Each strand passing through the first-layer chip 12 having a diameter of 90 mm and equally divided into 20 holes is connected to the concentrator junction port 10.
And twisted.

At this time, in order to form the hollow portion 4, when a wire having the compression dies 11 arranged on the same circumference passes, a wire of the same material as the wire, called a lead wire, is used as a wire. It passes simultaneously.

The lead wire diameter in the present embodiment is set at 0.1 mm.
The first layer hollow portion 4 is formed using 840 mmφ.

At this time, the wire diameter of the lead wire needs to match the inside diameter of the hollow portion to be formed, and the inside diameter of the hollow portion can be calculated as a reference value.

In the present invention, the compression is performed using the compression die 11, and the compression ratio is obtained by dividing the diameter of the compression die by the outer diameter of the twist composed of a plurality of strands arranged on the same circumference. It is.

Twist outer diameter (D) arranged and arranged on the same circumference
Is obtained by Expression 1 for the element diameter (d) and the plurality (n).

[0019]

(Equation 1)

Therefore, the compression ratio (P) is obtained by equation (2).

[0021]

(Equation 2)

The hollow inner diameter is the inner diameter of a hollow portion formed by deforming a plurality of strands arranged on the same circumference through a compression die.

At this time, each of the wires undergoes compressive deformation, and the formed hollow inner diameter (LD) of the first layer is expressed by the following equation (3).
Is obtained as a reference value. However, the hollow inner diameter of the second layer is not limited to this.

[0024]

(Equation 3)

As in this embodiment, the wire diameter is 0.180 m.
The compression ratio when using 20 strands 2 of the first layer at m and compressing with a compression die diameter of 1.174 mm is obtained by Expressions 4 and 5, and the hollow inner diameter is obtained by Expression 6. Things.

[0026]

(Equation 4)

[0027]

(Equation 5)

[0028]

(Equation 6)

Accordingly, the wire diameter of the lead wire of the present embodiment is obtained by forming the first layer hollow portion 4 using 0.840 mmφ in accordance with the above equation (6).

Next, in the formed hollow portion 4, 14 wires of the second layer are equally divided into 14 holes each having a diameter of 45 mm and 14 holes.
Insert through the layered chip 13 while twisting.

The wire diameter of the second-layer lead wire is
This is predicted from the twist outer diameter composed of 14 strands of the layer. In the embodiment, the hollow portion is formed by using 0.600 mmφ.

FIG. 1 shows the configuration of the formed multilayer hollow compression stranded wire.
Indicated by

Further, in the hollow part formed in claim 1,
An embodiment of the multilayer hollow compression twisted wire according to claim 2 incorporating the same wire material as the outer layer strand which is not affected by compression from the outer layer will be described with reference to FIG.

FIG. 6 shows a tin-plated annealed copper wire 14 having a wire diameter of 0.180 mm in a hollow portion composed of 17 wires of the first layer and 27 wires of the outer wires of 10 wires of the second layer. Are incorporated into three of them.

Although the outer layer is affected by the compression die and the contact surface is deformed, it can be seen that the three tinned annealed copper wires 14 in the hollow portion are not affected by the outer layer at all.

The present invention is not limited to the above embodiment. That is, the wire diameter of each of the above-mentioned strands is desirably selected according to the application, and the number of used strands and the twist pitch are also desirably selected according to the diameter of the twisted wire.

Further, the number of layers is not limited to the two layers in the above embodiment, but may be a multilayer structure depending on the desired conductor cross-sectional area.

[0038]

As described above, according to the first aspect of the present invention, a plurality of layers have a perfect circular and smooth layer structure, can have a large conductor cross-sectional area, and have a center line that is It is possible to provide a multilayer hollow compression stranded wire characterized by having no stranded wire.

According to the second aspect of the present invention, since various wires can be incorporated in the hollow portion, the characteristics of the stranded wire can be improved.

[Brief description of the drawings]

FIG. 1 schematically shows a multilayer hollow compression stranded wire according to claim 1 manufactured by the present invention, wherein (a) is a side view,
(B) is a sectional view taken along line AA in (a).

FIGS. 2A and 2B schematically show a conventional single-layer hollow compression stranded wire, in which FIG. 2A is a side view, and FIG. 2B is a cross-sectional view taken along line BB in FIG.

FIG. 3 (a) shows a strand dividing method for producing a multilayer hollow compression stranded wire, and FIG. 3 (b) shows a plan view of a mesh plate used for strand dividing.

FIGS. 4A and 4B schematically show a concentric twisted wire having a center line, wherein FIG. 4A is a side view, and FIG.
FIG. 4 is a sectional view taken along line C of FIG.

FIG. 5 schematically shows a general collective twisted wire;
(A) is a side view, (b) is a DD line sectional view in (a).

FIG. 6 schematically shows the multilayer hollow compression stranded wire according to claim 2 in which the same wire material as the outer layer wire is incorporated in the hollow portion according to claim 1, (a) is a side view, and (b) is a side view. E in (a)
FIG. 4 is a sectional view taken along line -E.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 First-layer hollow compression stranded wire 2 First-layer wire 3 Multiple first-layer wires 4 First-layer hollow portion 5 Second-layer hollow compression stranded wire 6 Second layer 7 Plural strands of second layer 8 Hollow portion of second layer 9 Eye plate 10 Concentrator line 11 Compression die 12 First layer chip 13 Second layer chip 14 Tinned annealed copper wire 20 strands 21 plural strands 22 center line

Claims (2)

[Claims] 1. A center line formed by a plurality of layers in which a plurality of strands are arranged on the same circumference and a new plurality of strands are arranged on the same circumference in a formed hollow portion. Multi-layer hollow compression twisted wire characterized by having no. 2. A multi-layer hollow compression stranded wire, wherein the same hollow wire as the outer layer wire or a wire different from that of the outer layer wire is incorporated into the hollow portion formed according to claim 1 without being affected by compression from the outer layer.