JP2017174548A - Braided wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a braided wire having both of strength and elasticity.SOLUTION: A braided wire 1 has a plurality of braided single wires 2. A shape of the braided wire 1 is cylindrical. Each single wire 2 has a stainless wire 21 and a metal layer 22 covering an outer peripheral surface of the stainless wire 21. The metal layer 22 can be constituted by an Al layer or an Al alloy layer. A ratio of diameter φof the stainless wire 21 to diameter φof the single wire 2 is preferably 40% or more. The braided wire 1 can be suitably used for vehicles.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a braided wire.

  Conventionally, a braided wire formed by knitting a plurality of strands into a tubular shape is used in a wire harness used in a vehicle such as an automobile. As a strand constituting this type of braided wire, for example, as described in Patent Document 1, a copper strand mainly composed of copper such as a bare annealed copper wire, an oxygen-free annealed copper wire, and a tin-plated annealed copper wire is used. Has been.

  In recent years, in order to reduce the weight of the wire harness, it has been proposed to use an aluminum strand mainly composed of aluminum instead of the copper strand.

JP 2015-18756 A

  However, aluminum has a lower strength than copper. For this reason, when a braided wire made of an aluminum strand is arranged in a high-vibration region that is subject to vibration, such as an engine or a door bent portion in an automobile or the like, there is a possibility that all the aluminum strand may be disconnected due to metal fatigue due to vibration. Therefore, it is difficult to arrange a braided wire made of an aluminum strand in a high vibration region.

  The present invention has been made in view of the above background, and intends to provide a braided wire having both strength and bending resistance.

One aspect of the present invention is a tubular braided wire having a plurality of braided strands,
The said strand is a braided wire which has a stainless steel wire and the metal layer which covers the outer peripheral surface of this stainless steel wire.

  In the braided wire, the strands constituting the braided wire have a stainless steel wire and a metal layer that covers the outer peripheral surface of the stainless steel wire. Therefore, in the braided wire, the strength and bending resistance of the strands are improved by the stainless steel wire present inside. Therefore, the braided wire can have both strength and bending resistance. In addition, the braided wire can change the type of metal material composing the metal layer covering the outer peripheral surface of the stainless steel wire as compared with the braided wire whose entire strand is made of stainless steel wire. Function can be demonstrated.

1 is an external view schematically showing a braided wire of Example 1. FIG. It is the figure which showed typically the II-II line cross section in FIG. It is the figure which showed typically the cross section of the strand which comprises the braided wire of Example 1. FIG.

  In the braided wire, the strand includes a stainless steel wire and a metal layer that covers the outer peripheral surface of the stainless steel wire.

  Examples of the stainless steel material constituting the stainless steel wire include an austenitic stainless steel material such as SUS201.

  The metal layer can be made of at least one metal material selected from the group consisting of Al, Cu, Sn, Ni, Ag, Au, Pt group, and alloys thereof. In this case, a braided wire capable of exhibiting a function corresponding to the type of the metal material is obtained.

  Specifically, for example, when the metal layer is an Al layer or an Al alloy layer, since the density of Al, Al alloy is smaller than the density of stainless steel, compared to a braided wire consisting of stainless steel as a whole, It is easy to reduce the weight of the braided wire with the same wire diameter. Further, it is advantageous for reducing the cost of the braided wire. When the metal layer is a Cu layer or a Cu alloy layer, the strength and conductivity are excellent. When the metal layer is a Sn layer or a Sn alloy layer, the corrosion resistance is excellent. When the metal layer is a Ni layer or a Ni alloy layer, the corrosion resistance is excellent. When the metal layer is an Ag layer or an Ag alloy layer, the conductivity is excellent. When the metal layer is an Au layer or an Au alloy layer, the conductivity is excellent. When the metal layer is a Pt group layer or a Pt group alloy layer, the conductivity is excellent.

  Specifically, the metal layer can be a plating layer made of the above-described metal material. In this case, since the outer peripheral surface of the stainless steel wire can be reliably covered with the metal layer, the above-described operation and effect can be ensured. The plating layer can be formed by electrolytic plating. The metal layer can be composed of one layer or a plurality of layers.

  In the braided wire, the strand may have a ratio of the diameter of the stainless wire to the diameter of the strand of 40% or more.

In this case, it becomes easy to ensure the strength and bending resistance of the braided wire. The ratio is preferably 41% or more, more preferably 42% or more, and still more preferably 43% or more, from the viewpoint of improving the strength of the braided wire and improving the bending resistance. The ratio is preferably 90% or less, more preferably 80% or less, still more preferably 70% or less, and even more preferably, from the viewpoint of ensuring a function according to the type of metal material constituting the metal layer. May be 60% or less, and even more preferably 50% or less. Incidentally, ₀ the diameter of the wire _phi, when the diameter of the stainless steel wire was phi _1, the ratio of the diameter of the stainless steel wire to the diameter of the wire is calculated from the formula 100 × φ _{1 /} φ _0.

  The braided wire can be suitably used in a vibration environment. In this case, the above-described operational effects can be sufficiently exhibited.

  The braided wire can be suitably used for vehicles. Specifically, for example, the braided wire can be applied to a vehicle wire harness. More specifically, the braided wire can be used so as to cover the outer periphery of the vehicle wire harness. Moreover, the said braided wire can be used so that the outer periphery of the 1 or 2 or more electric wire which comprises the wire harness for vehicles may be covered. Further, the braided wire can be used so as to be disposed between the conductor of the electric wire constituting the vehicle wire harness and the insulator so as to cover the conductor. Examples of the vehicle include an automobile, a train, a train, and a motorcycle.

  In addition, each structure mentioned above can be arbitrarily combined as needed, in order to acquire each effect etc. which were mentioned above.

  Hereinafter, the braided wire of an Example is demonstrated using drawing.

Example 1
The braided wire of Example 1 will be described with reference to FIGS. As shown in FIGS. 1 to 3, the braided wire 1 of this example has a plurality of strands 2 knitted. The shape of the braided wire 1 is cylindrical. Each of the strands 2 includes a stainless wire 21 and a metal layer 22 that covers the outer peripheral surface of the stainless wire 21. In addition, in FIG. 2, each strand 2 is abbreviate | omitted.

In this example, the metal layer 22 is an Al layer or an Al alloy layer. As shown in FIG. 3, the ratio of the diameter φ ₁ of the stainless wire 21 to the diameter φ ₀ of the strand 2 is 40% or more.

Hereinafter, a braided wire sample was prepared and evaluated. An experimental example will be described.
(Experimental example)
(Preparation of braided wire)
An Al plating layer was formed on the outer peripheral surface of a stainless steel wire having a diameter of 0.135 mm by electrolytic plating to obtain a strand having a diameter of 0.3 mm (hereinafter sometimes referred to as SUS / Al strand). In the obtained SUS / Al strand, the ratio of the diameter of the stainless wire to the diameter of the strand (= 100 × 0.135 / 0.3) is 45%. The braided wire of Sample 1 was obtained by weaving the SUS / Al strands into a cylindrical shape. That is, as for the braided wire of the sample 1, Al plating is applied to each element wire.

  A braided wire of a reference sample was obtained by weaving a soft Cu strand having a diameter of 0.3 mm into a cylindrical shape. Further, a braided wire of Sample 1C was obtained by weaving Al strands having a diameter of 0.3 mm into a cylindrical shape.

  Note that the braided wires of the sample 1, the reference sample, and the sample 1C produced as described above are knitted with 32 strokes and 7 knitting wires. In this experimental example, the length of each braided wire in the longitudinal direction was 1 m.

  Based on the braided wire of a reference sample made of a soft Cu wire that has been widely used in the past, the strength and bending resistance of the braided wire of the sample 1C made of Al wire, the braided wire of the sample 1 made of SUS / Al wire Was evaluated as follows.

(Strength evaluation)
The tensile strength of each strand used for producing each braided wire was measured at a tensile speed of 50 mm / min. It was judged that the higher the tensile strength of the wire, the higher the strength of the braided wire.

(Bend resistance evaluation)
The state of occurrence of wire breakage when each braided wire was bent 10 million times with a constant strain (0.004) was confirmed. The case where there was no disconnection in the element wire was designated as “A +” as having excellent bending resistance. Although disconnection was seen in a part of the strands constituting the braided wire, the conductivity of the braided wire as a whole can be ensured. A ”. The case where all the strands constituting the braided wire were disconnected was designated as “C” as being inferior in bending resistance.

  The evaluation results are summarized in Table 1.

  According to Table 1, the following can be understood. The braided wire of the sample 1C is made of an Al strand. Aluminum is less strong than copper. Therefore, the braided wire of Sample 1C is inferior in both strength and bending resistance compared to the braided wire of the reference sample. Therefore, it can be said that it is difficult to arrange the braided wire of the sample 1C in the high vibration region.

  On the other hand, the braided wire of the sample 1 is made of a SUS / Al strand. That is, in the braided wire of the sample 1, the strength and bending resistance of the strand are improved by the stainless steel wire existing inside. Therefore, the braided wire of the sample 1 can have both strength and bending resistance. It can also be seen that the braided wire of Sample 1 has a strength and bending resistance equal to or higher than the braided wire of a reference sample made of soft Cu wire. Therefore, it can be said that the braided wire of the sample 1 can be arranged in a high vibration region as an alternative to the braided wire of the reference sample. In addition, since the braided wire of Sample 1 is an Al layer or an Al alloy layer, it is easy to reduce the weight with the same strand diameter compared to a braided wire composed of stainless steel as a whole.

  As mentioned above, although the Example of this invention was described in detail, this invention is not limited to the said Example, A various change is possible within the range which does not impair the meaning of this invention.

1 Braided wire 2 Wire 21 Stainless steel wire 22 Metal layer

Claims (6)

A tubular braided wire having a plurality of strands knitted,
The said strand is a braided wire which has a stainless steel wire and the metal layer which covers the outer peripheral surface of this stainless steel wire.   The braided wire according to claim 1, wherein the metal layer is composed of at least one metal material selected from the group consisting of Al, Cu, Sn, Ni, Ag, Au, Pt group, and alloys thereof. .   The braided wire according to claim 1, wherein the metal layer is an Al layer or an Al alloy layer.   The braided wire according to any one of claims 1 to 3, wherein a ratio of the diameter of the stainless steel wire to the diameter of the wire is 40% or more.   The braided wire according to any one of claims 1 to 4, which is used in a vibration environment.   The braided wire according to any one of claims 1 to 5, which is for a vehicle.

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