JP2014013741A - Fiber conductor and method of manufacturing electric wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fiber conductor having improved tensile strength.SOLUTION: A fiber conductor 31 includes at least two fibers 34, and a plating layer 35 which is formed on the outer peripheral surfaces of the at least two fibers 34 by integrally plating the fibers 34 with a conductive metal. The plating layer 35 includes a first plating layer 35A and a second plating layer 35B. The first plating layer 35A is formed on each fiber 34 so as to cover the outer peripheral surface of the fiber 34, and the second plating layer 35B further covers the outer peripheral surface of the first plating layers 35A in a state where the at least two fibers 34, each of which of the outer peripheral surfaces have been covered with the first plating layer 35A, are located inside thereof.

Description

  The present invention relates to a fiber conductor and a method for manufacturing an electric wire.

  Conventionally, as a core wire of an electric wire, for example, a wire formed by twisting a plurality of copper wires has been used. In order to increase the tensile strength and flexibility and to reduce the weight of the electric wire using a copper wire as the core wire, a plurality of fibers whose surfaces are plated with a conductive metal such as copper are twisted. The thing which made the fiber conductor the core wire is proposed (for example, refer patent document 1 and patent document 2).

JP-A-6-20522 JP 2012-74180 A

  As an example of a conventional electric wire, an electric wire 2 disclosed in Patent Document 2 is shown in FIG. 5A and 5B are diagrams showing a conventional electric wire 2, FIG. 5A is a side view of the electric wire 2, FIG. 5B is a front view of the electric wire 2, and FIG. 5C is a perspective view of the conductor 23. is there.

  The electric wire 2 comprises the wire harness routed, for example to the motor vehicle etc. as a moving body. As illustrated in FIG. 5A, the electric wire 2 includes a conductive fiber conductor 21 and an insulating coating layer 22. The fiber conductor 21 is formed by twisting a plurality of conductors 23. The conductor 23 is composed of, for example, a fiber 24 made of a resin such as para-aramid or polyarylate, and a plated layer 25 made of copper, which is a conductive metal formed by plating the surface of the fiber 24. Yes.

  By the way, compared with metals, such as copper, a fiber has a small extent (elongation) until it breaks, when a tensile stress acts. For this reason, when the tensile stress acts, the fiber is slightly stretched and then broken. Moreover, in the conventional electric wire 2, there exists a possibility that the length of each fiber 24 which comprises each twisted conductor 23 may have variation. When there is a variation in the length of the fiber 24, when the gradually increasing tensile stress is applied to the electric wire 2, the fiber 24 is broken in order from the shortest one. Thus, in the conventional electric wire 2, when the length of the fiber 24 varies, the tensile stress acts on the electric wire 2, and the short fiber breaks before the long fiber. There was a possibility that tensile strength might fall.

  This invention is made | formed in view of the situation mentioned above, The objective is to provide the manufacturing method of the fiber conductor which improved the tensile strength, and an electric wire.

In order to achieve the above-mentioned object, the fiber conductor according to the present invention is characterized by the following (1) to (6).
(1) at least two fibers;
The at least two fibers are integrally plated with a conductive metal, and a plating layer formed on the outer peripheral surface of the fibers;
Be provided.
(2) A fiber conductor configured as described in (1),
The plating layer has a first plating layer and a second plating layer,
The first plating layer covers the outer peripheral surface of the fiber and is formed for each of the fibers,
The second plating layer further covers the outer peripheral surface of the first plating layer in a state where the outer peripheral surface is covered by the first plating layer and at least two of the fibers are located inside;
about.
(3) A fiber conductor configured as described in (1) or (2),
The at least two fibers are arranged in parallel;
about.
(4) A fiber conductor configured as described in (2),
The first plating layer is formed of a conductive metal having higher conductivity than the second plating layer.
about.
(5) A fiber conductor having the structure of (2) or (4),
The first plating layer is formed of a conductive metal having a smaller ionization tendency than the second plating layer;
about.
(6) A fiber conductor configured as described in (2),
The first plating layer is made of copper, and the second plating layer is made of tin;
about.

In order to achieve the above-described object, the electric wire manufacturing method according to the present invention is characterized by the following (7) to (11).
(7) At least two fibers, the at least two fibers are each plated with a conductive metal, a plating layer formed on the outer peripheral surface of the fiber, and the outer peripheral surface is covered with the plating layer, and bundled An electric wire forming step of forming an electric wire comprising: a covering layer formed of an insulating material that covers an outer peripheral surface of the plated layer in a state where the at least two fibers formed are located inside;
Removing the covering layer at one end of the electric wire to expose the plating layer covering the outer peripheral surface of the fiber at the one end; and
A melting step of disposing and melting the plated layer at the exposed one end portion in a temperature environment higher than the melting point of the conductive metal forming the plated layer;
A solidification step of solidifying the molten plating layer and integrally plating the at least two fibers at the one end;
Including.
(8) A method of manufacturing an electric wire having the structure of (7),
In the electric wire forming step, the plating layer covers a peripheral surface of each of the at least two fibers, a first plating layer formed of a first conductive metal, and an outer periphery of each of the first plating layers Forming the electric wire further comprising a second plating layer formed of a second conductive metal that further covers a surface and has a melting point lower than that of the first conductive metal;
In the melting step, the plating layer is disposed in a temperature environment lower than the melting point of the first conductive metal and higher than the melting point of the second conductive metal to melt the second plating layer. ,
about.
(9) A method of manufacturing an electric wire having the structure of (7),
Between the removing step and the melting step, the plating at the one end where the adhesion member formed by the third conductive metal having a melting point lower than the melting point of the conductive metal forming the plating layer is exposed. Further comprising an attaching step for attaching to the layer;
In the melting step, the adhesion member is disposed and melted in a temperature environment lower than the melting point of the conductive metal forming the plating layer and higher than the melting point of the third conductive metal,
In the solidification step, the molten adhesion member is solidified.
about.
(10) At least two fibers, the at least two fibers are each plated with a conductive metal, a plating layer formed on the outer peripheral surface of the fiber, and the outer peripheral surface is covered with the plating layer, and bundled An electric wire forming step of forming an electric wire comprising: a covering layer formed of an insulating material that covers an outer peripheral surface of the plated layer in a state where the at least two fibers formed are located inside;
Removing the covering layer at one end of the electric wire to expose the plating layer covering the outer peripheral surface of the fiber at the one end; and
An adhesive formed of a fourth conductive metal having a melting point lower than that of the conductive metal forming the plated layer is applied to the fourth conductive metal lower than the melting point of the conductive metal forming the plated layer. An adhesion step of placing and melting in a temperature environment higher than the melting point, and adhering the melted adhesive to the plated layer at the exposed one end;
A solidification step of solidifying the adhesive adhered to the plating layer and integrally plating the at least two fibers at the one end;
Including.
(11) A method of manufacturing an electric wire having the configuration of (7) or (8),
In the solidification step, the plating layer is solidified so that the outer shape of the at least two fibers in the one end portion plated integrally is a flat shape.
about.

In the fiber conductor having the configuration (1), since at least two fibers are integrally plated with a conductive metal, when tensile stress acts on the fiber conductor, a force is evenly applied to each fiber. easy. For this reason, when there is variation in the length of each fiber, even if a tensile stress acts on the fiber conductor, the short fiber is less likely to break before the long fiber.
In the fiber conductor having the configuration (2), since the plating layer is constituted by the first plating layer and the second plating layer, the tensile strength is high. For this reason, when tensile stress acts on the fiber conductor, short fibers are less likely to break before long fibers.
In the fiber conductor having the configuration (3), since at least two fibers are arranged in parallel, the fiber length is less likely to vary as compared with a conventional fiber conductor formed by twisting the fibers. . For this reason, when tensile stress acts on the fiber conductor, short fibers are less likely to break before long fibers. In particular, when each individual fiber is covered with a conductive metal, the rigidity of the fiber increases and the fiber becomes easy to handle, and therefore it is easy to arrange in parallel.
In the fiber conductor having the configuration (4), since the plating layer formed of a metal having high conductivity is disposed on the inner side, good conductivity is added to the fiber. Further, for example, by covering the outer peripheral surface with a relatively inexpensive metal, a fiber conductor having high tensile strength can be obtained at a low cost.
In the fiber conductor having the configuration (5), the first plating layer formed of a metal having a low ionization tendency is disposed inside, and the second plating layer is formed of a metal having a higher ionization tendency than the first plating layer. Since the plating layer is disposed so as to cover the outer peripheral surface thereof, when the fiber conductor is used, a terminal formed of a metal having a higher ionization tendency than the first plating layer and the second plating layer is used as the fiber. When attached to the end of the conductor, the potential difference between the terminal and the fiber conductor can be reduced, and the occurrence of electrolytic corrosion between the terminal and the fiber conductor can be suppressed.
In the fiber conductor having the configuration (6), the first plating layer is made of copper, and the second plating layer is made of tin. Copper is more conductive than tin and less prone to ionization. For this reason, favorable electroconductivity can be added to a fiber and it can suppress that an electric corrosion arises between a terminal and a fiber conductor.

In the method of manufacturing an electric wire having the configuration of (7), at least two fibers, a plating layer formed of a conductive metal on the outer peripheral surface of the at least two fibers, and insulation covering the outer peripheral surface of the plating layer Based on an electric wire provided with a covering layer formed of a conductive material, an electric wire in which the at least two fibers are integrally plated with a conductive metal is obtained. In the electric wire thus obtained, since at least two fibers are integrally plated with a conductive metal, when tensile stress is applied to the electric wire, a force is easily applied evenly to each fiber. For this reason, when there is variation in the length of each fiber, even if a tensile stress acts on the electric wire, the short fiber is less likely to break before the long fiber.
In the method for manufacturing an electric wire having the above configuration (8), the plating layer covers the outer peripheral surfaces of at least two fibers, the first plating layer formed of a first conductive metal, and the first plating layer. At least two fibers based on an electric wire further comprising a second plated layer formed of a second conductive metal having a lower melting point than the first conductive metal and further covering the outer peripheral surface of each of the plated layers Can be obtained by integrally plating the first plating layer and the second plating layer. The electric wire thus obtained has a high tensile strength because the plating layer is constituted by the first plating layer and the second plating layer. For this reason, when tensile stress acts on the fiber conductor, short fibers are less likely to break before long fibers.
In the method for producing an electric wire having the above-described configuration (9), after an adhesion member prepared separately from the electric wire is adhered to the plating layer at one end of the electric wire, the adhesion member is melted and solidified, An electric wire in which at least two fibers are integrally plated with a conductive metal is obtained. For this reason, it is not necessary to previously form a plating layer on the electric wire for melting and solidifying and integrally plating the fibers, and the work process can be simplified and the cost can be reduced.
In the method for manufacturing an electric wire having the above-described configuration (10), at least two wires are prepared by adhering an adhesive prepared separately from the electric wire to the plating layer at one end of the electric wire, and then solidifying the adhesive. An electric wire in which fibers are integrally plated with a conductive metal is obtained. For this reason, it is not necessary to previously form a plating layer on the electric wire for melting and solidifying and integrally plating the fibers, and the work process can be simplified and the cost can be reduced.
In the method for producing an electric wire having the above configuration (11), since the outer shape of at least two fibers is a flat type, the length of the fibers varies as compared with a conventional fiber conductor formed by twisting fibers. Hard to occur. For this reason, when tensile stress acts on the fiber conductor, short fibers are less likely to break before long fibers.

  According to the fiber conductor and electric wire manufacturing method of the present invention, it is possible to provide a fiber conductor with improved tensile strength and an electric wire manufacturing method.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

1A and 1B are diagrams showing an electric wire 1 according to a reference example. FIG. 1A is a side view of the electric wire 1, FIG. 1B is a front view of the electric wire 1, and FIG. FIG. FIG. 2 is a graph showing the tensile strength of the fiber conductor shown in FIG. FIG. 3 is a perspective view showing the electric wire 3 according to the first embodiment. FIG. 4 is a diagram showing a manufacturing process of the electric wire 3, FIG. 4A is a perspective view showing the fiber conductor 31 before the covering layer 32 is attached, and FIG. 4B is a perspective view showing the manufactured electric wire 3. is there. 5A and 5B are diagrams showing a conventional electric wire 2, FIG. 5A is a side view of the electric wire 2, FIG. 5B is a front view of the electric wire 2, and FIG. 5C is a perspective view of the conductor 23. is there. FIG. 6 is a perspective view showing the electric wire 4 according to the second embodiment. FIG. 7 is a diagram showing the electric wire 5 used in the method of manufacturing the electric wire 4, FIG. 7 (a) is a side view of the electric wire 5, FIG. 7 (b) is a front view of the electric wire 5, and FIG. 4 is a perspective view of a conductor 53 of the electric wire 5. FIG. 8A and 8B are diagrams illustrating a method of manufacturing the electric wire 4. FIG. 8A illustrates an electric wire forming process for forming the electric wire 5, and FIG. 8B covers an outer peripheral surface of the fiber 54 at one end of the electric wire 5. FIG. 8C shows a removing step for exposing the plated layer 55, FIG. 8C shows a melting step for melting the exposed tin plated layer 55B, and FIG. 8D shows a fiber by solidifying the molten tin plated layer 55B. FIG. 8E is a perspective view showing an attaching step for attaching the manufactured electric wire 5 to the terminal 80. FIG. FIG. 9 is a view showing a first modification of the method for manufacturing the electric wire 4, FIG. 9A shows an electric wire forming process for forming the electric wire 6, and FIG. 9B shows a fiber at one end of the electric wire 6. 9 (c) is a removing step for exposing the plating layer 65 covering the outer peripheral surface 64, and FIG. 9 (d) is an attaching step for attaching the tin tape 71 to the plating layer 65 at the exposed one end. FIG. 9E shows a melting process for melting the tin tape 71, FIG. 9E shows a solidification process for solidifying the melted tin tape 71 and plating the fibers 64 integrally, and FIG. It is a perspective view which shows the attachment process to attach. FIG. 10 is a view showing the electric wire 6 used in the first modification of the method for manufacturing the electric wire 4, FIG. 10 (a) is a side view of the electric wire 6, and FIG. 10 (b) is a front view of the electric wire 6, FIG. 10C is a perspective view of the conductor 63 of the electric wire 6. 11A and 11B are diagrams showing a second modification of the method for manufacturing the electric wire 4, FIG. 11A shows an electric wire forming process for forming the electric wire 6, and FIG. 11B shows a fiber at one end of the electric wire 6. FIG. 11 (c) shows a removing process for exposing the plating layer 65 covering the outer peripheral surface of 64, FIG. 11 (d) shows an attaching process for attaching the tin paste 73 to the plating layer 65 at the exposed one end. FIG. 11E is a perspective view showing a solidifying process in which the tin paste 73 is solidified to plate the fibers 64 integrally, and FIG. 11E is a mounting process in which the terminal 80 is attached to the manufactured electric wire 6. 12A and 12B are explanatory diagrams showing the connection form of the terminal and the fiber conductor. FIG. 12A shows a case of one-stage connection, FIG. 12B shows a case of two-stage connection, and FIG. FIG. 12D is a cross-sectional view showing an example of a connection form in actual crimping, FIG. 12D is a case of four-stage connection, and FIG. FIG. 13 is an explanatory diagram showing the relationship between the connection form between the terminal and the fiber conductor and the connection resistance between the terminal and the fiber conductor, and each graph shows the distance between the terminal core wires in the case of one-stage connection in order from the left. Resistance, inter-terminal resistance and inter-core resistance in case of two-stage connection, inter-terminal resistance and inter-core resistance in case of four-stage connection, and inter-terminal resistance and inter-core resistance during actual crimping Yes.

  Specific embodiments of the fiber conductor and electric wire manufacturing method according to the present invention will be described below with reference to the drawings.

(Reference example)
First, before creating the fiber conductor according to the present invention, the fiber conductor created by the inventors of the present application will be described as a reference example. 1A and 1B are diagrams showing an electric wire 1 according to a reference example. FIG. 1A is a side view of the electric wire 1, FIG. 1B is a front view of the electric wire 1, and FIG. FIG.

  The electric wire 1 which concerns on a reference example comprises the wire harness routed, for example to the motor vehicle etc. as a moving body similarly to the conventional electric wire 2 shown in FIG. 5 mentioned above. As shown in FIG. 1A, the electric wire 1 includes a conductive fiber conductor 11 and an insulating coating layer 12 that covers the outer peripheral surface of the fiber conductor 11. As shown in FIG. 1B, the fiber conductor 11 is formed by twisting a plurality of conductors 13. The conductor 13 includes, for example, a fiber 14 made of a resin such as para-aramid or polyarylate, and a plated layer 15 formed on the outer peripheral surface of the fiber 14 by plating the fiber 14 with a conductive metal. Yes. As shown in FIG. 1C, the plating layer 15 is made of copper plating layer 15 </ b> A made of copper covering the outer peripheral surface of the fiber 14 and tin covering further the outer peripheral surface of the copper plating layer 15 </ b> A covering the outer peripheral surface of the fiber 14. And a tin plating layer 15B.

  Since the fiber conductor 11 further includes a tin plating layer 15B that covers the outer peripheral surface of the copper plating layer 15A as compared with the conventional electric wire 2, the tensile strength is improved.

FIG. 2 is a graph showing the tensile strength of the fiber conductor 11 shown in FIG. FIG. 2 shows the tensile strength of a fiber conductor 11 having a cross-sectional area of 0.05 mm ² formed by twisting 80 conductors 13 each having a tensile strength of about ^2.5 N and soft copper having a cross-sectional area of 0.5 mm ² . The tensile strength is shown. The horizontal axis indicates the elongation (%) from the original length, and the vertical axis indicates the tensile strength (N).

  In theory, the tensile strength of the fiber conductor 11 formed by twisting 80 conductors 13 having a tensile strength of about 2.5 N is theoretically about 2.5 N, which is simply the tensile strength of one. If it is multiplied by 80, it should be 200N. However, as shown in FIG. 2, the tensile strength of the fiber conductor 11 is about 120 N, which is smaller than the theoretical value.

  As shown in FIG. 2, when tensile stress is applied, the annealed copper is stretched by 30% or more before breaking, whereas the fiber conductor according to the reference example is broken before breaking, that is, 80 conductors 13 Only about 4% stretches before everything breaks. That is, as described above, the fiber has a smaller elongation than a metal such as copper. Further, as described above, the length of the fiber 14 constituting the conductor 13 varies. For this reason, when tensile stress acts on the fiber conductor 11, the short one of the 80 conductors 13 breaks first. As a result, the inventors of the present application infer that the tensile strength of the fiber conductor 11 is reduced and the tensile strength of the fiber conductor 11 is about 120 N, which is smaller than the theoretical value.

(First embodiment)
Next, a description will be given of a first embodiment of the fiber conductor according to the present invention in which the tensile strength is further improved from the fiber conductor 11 according to the reference example created by the inventors of the present application described above. FIG. 3 is a perspective view showing the electric wire 3 according to the first embodiment. Schematically, the fiber conductor 21 in the conventional electric wire 2 and the fiber conductor 11 according to the reference example are formed by twisting a plurality of conductors having a plating layer formed on the outer peripheral surface, whereas the first is the first. The fiber conductor 31 according to this embodiment is different in that it is configured by integrally plating a plurality of fibers having a plating layer formed on the outer peripheral surface.

  The fiber conductor 31 which concerns on 1st Embodiment comprises the wire harness routed, for example to the motor vehicle etc. as a mobile body like the conventional electric wire 2 shown in FIG. 5 mentioned above. The electric wire 3 includes a fiber conductor 31 having conductivity and extending in the longitudinal direction, and a coating layer 32 made of an insulating material that covers the outer peripheral surface of the fiber conductor 31. The fiber conductor 31 is configured by arranging a plurality of fibers 34 vertically and horizontally. Details of the arrangement of the fibers 34 will be described later. The fiber conductor 31 includes, for example, a fiber 34 made of a resin such as para-aramid or polyarylate, and a plated layer 35 formed on the outer peripheral surface of the fiber 34 by plating the fiber 34 with a conductive metal. ing. The plated layer 35 covers the outer peripheral surface of the fiber 34, and a copper plated layer 35A (first plated layer) made of copper formed for each fiber 34, and the outer peripheral surface covered with the copper plated layer 35A. In the state where all 34 are located inside, a tin plating layer 35B (second plating layer) made of tin that further covers the outer peripheral surface of the copper plating layer 35A is provided. That is, the tin plating layer 35B is a plating layer formed on the outer peripheral surface of the copper plating layer 35A by integrally plating the fibers 34 having the copper plating layer 35A formed on the outer peripheral surface with tin. Copper constituting the copper plating layer 35A has higher conductivity and less ionization tendency than tin constituting the tin plating layer 35B.

  In the fiber conductor 31 according to the first embodiment, as shown in FIG. 3, the fibers 34 are arranged side by side in six in the horizontal direction in FIG. 3 and three in the vertical direction in FIG. 3. Further, the fibers 34 are arranged in parallel at equal intervals in the vertical and horizontal directions in FIG. Further, the outer shape of the fiber conductor 31 is formed in a flat shape.

  Next, with reference to FIG. 4, the manufacturing method of the electric wire 3 which concerns on 1st Embodiment is demonstrated. 4A and 4B are diagrams showing a manufacturing process of the electric wire 3. FIG. 4A is a perspective view showing the fiber conductor 31 before the covering layer 32 is attached, and FIG. 4B is a perspective view showing the electric wire 3. Hereinafter, in the description of the method for manufacturing the electric wire 3, an embodiment in which an operator performs an operation related to the manufacture will be described, but the embodiment of the present invention is not limited thereto. For example, a mode in which part or all of the work related to manufacturing is performed by a manufacturing apparatus may be used.

  First, the operator plating the outer peripheral surface of each fiber 34 with copper to obtain the fiber 34 whose outer peripheral surface is covered with the copper plating layer 35A. The operator arranges the fibers 34 whose outer peripheral surfaces are covered with the copper plating layer 35A in the left-right direction, three in the vertical direction, and are arranged in parallel at equal intervals in each direction. Then, as shown in FIG. 4A, the operator covers the outer peripheral surface of the fiber 34 so that all the fibers 34 arranged side by side and whose outer peripheral surface is covered with the copper plating layer 35A are integrated. The outer peripheral surface of the copper plating layer 35A is plated with tin. As a result, a solid cylindrical flat fiber conductor 31 shown in FIG. 4A is obtained.

  Next, as shown in FIG. 4B, the worker covers the outer peripheral surface of the fiber conductor 31 with a coating layer 32 made of an insulating material. Thereby, the electric wire 3 shown in FIG.4 (b) is obtained.

  The electric wire 3 which concerns on this embodiment is manufactured by the manufacturing method demonstrated above.

(Second Embodiment)
Next, a second embodiment of the fiber conductor according to the present invention will be described. FIG. 6 is a perspective view showing the electric wire 4 according to the second embodiment. The electric wire 4 is schematically different from the electric wire 3 according to the first embodiment in the arrangement of the fibers 34. Hereinafter, regarding the description of the second embodiment, the same components as those of the electric wire 3 according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In addition, in FIG. 6, illustration of a coating layer is abbreviate | omitted and the electric wire 4 is shown.

  In the fiber conductor 31 according to the second embodiment, as shown in FIG. 6, the fibers 34 are arranged side by side in six in the horizontal direction in FIG. 6 and two in the vertical direction in FIG. 6. Further, the fibers 34 are arranged in parallel at equal intervals in the vertical and horizontal directions in FIG. The integrally plated fiber 34 has a flat outer shape.

Next, a method for manufacturing the electric wire 4 according to the second embodiment will be described.
In the method for manufacturing the electric wire 4 according to the second embodiment described below, the electric wire 5 shown in FIG. 7 having the same configuration as the electric wire 1 according to the reference example shown in FIG. The example which manufactures 4 is demonstrated. That is, as shown in FIG. 7, the electric wire 5 includes a plurality of conductive fiber conductors 51 and an insulating coating layer 52 that covers the outer peripheral surface of the fiber conductors 51. The fiber conductor 51 is configured by bundling (twisting) a plurality of fibers 54. The outer surfaces of the fibers 54 are respectively covered with a plating layer 55 formed of a conductive metal. In other words, the electric wire 5 has a plurality of fibers 54, the fibers 54 are respectively plated with a conductive metal, and the outer peripheral surface is covered with the plating layer 55 formed on the outer peripheral surface of the fiber 54, and the plating layer 55, And a covering layer 52 formed of an insulating material that covers the outer peripheral surface of the plating layer 55 with the bundled fibers 55 positioned inside. As shown in FIG. 7C, the plating layer 55 includes a copper plating layer 55 </ b> A formed of copper (first conductive metal) covering the outer peripheral surface of each fiber 54 and copper covering the outer peripheral surface of the fiber 54. And a tin plating layer 55B formed of tin (second conductive metal) that further covers the outer peripheral surface of each of the plating layers 55A. The melting point of copper as the first conductive metal is about 1000 ° C., which is higher than the melting point of tin as the second conductive metal, which is about 400 ° C.

  8A and 8B are diagrams showing a manufacturing process of the electric wire 4, FIG. 8A covers the electric wire forming process for forming the electric wire 5, and FIG. 8B covers the outer peripheral surface of the fiber 54 at one end of the electric wire 5. FIG. 8C shows a removing step for exposing the plated layer 55, FIG. 8C shows a melting step for melting the exposed tin plated layer 55B, and FIG. 8D shows a fiber by solidifying the molten tin plated layer 55B. FIG. 8E is a perspective view showing an attaching step for attaching the manufactured electric wire 5 to the terminal 80. FIG. Hereinafter, in the description of the method for manufacturing the electric wire 4, an embodiment in which a part of the manufacturing work is performed by the manufacturing apparatus will be described, but the embodiment of the present invention is not limited thereto. For example, the aspect described as being implemented by the manufacturing apparatus may be performed by an operator.

  In the electric wire forming step, first, as shown in FIG. 8A, the electric wire 5 is formed and prepared by a known manufacturing apparatus (not shown). And as shown to Fig.8 (a), an electric wire feeder (not shown) is arrange | positioned at predetermined intervals, and a pair of blade | edge 91 for the coating removal used in the removal process which is a next process is used. , 91 is arranged between the wires 5.

  In the removing step, the pair of blades 91, 91 move in a direction approaching each other, and as shown in FIG. 8B, the covering layer 52 at one end of the electric wire 5 is removed, and the fiber 54 at the one end is removed. The plating layer 55 covering the outer periphery of the substrate is exposed. And as shown in FIG.8 (b), an electric wire feeder is arrange | positioned in the said one end part between a pair of type | molds 92 and 92 used in the melting process which is the next process arrange | positioned at predetermined intervals. The electric wire 5 where the plating layer 55 is exposed is disposed. As shown in FIG. 8B, the molds 92 and 92 are formed with recesses 93, respectively.

  In the melting step, first, as shown in FIG. 8 (c), the pair of molds 92, 92 move in a direction approaching each other until the opposing surfaces come into contact with each other, and a flat mold formed by the recesses 93, 93 is formed. The exposed plating layer 55 is accommodated in the rectangular tube-shaped space 94. Thereafter, a heating device (not shown) heats the inside of the space 94 to a temperature lower than the melting point of copper and higher than the melting point of tin, for example, 600 ° C. When arranged in such a temperature environment, the tin plating layer 55B having a melting point lower than the internal temperature of the space 94 out of the plating layer 55 at one end of the electric wire 5 attached to the exposed fiber 54 is melted. It expands inside the space 94. At this time, the copper plating layer 55A having a melting point higher than the internal temperature does not melt.

  In the solidification step, a cooling device (not shown) cools the inside of the space 94 to a temperature sufficiently lower than the melting point of tin, for example, room temperature. When cooled in this manner, the tin-plated layer 55B melted in the melting step is solidified into a shape that conforms to the outer shape of the space 94, and the fibers 54 at one end of the electric wire 5 are integrated by the tin-plated layer 55B. Plated. Thereafter, when the pair of molds 92 and 92 move away from each other, as shown in FIG. 8D, the electric wire 5 in which the fiber conductor 51 in which the fibers 54 are integrally plated is formed at one end is obtained. It is done. At this time, before solidifying the molten tin plating layer 55B, as shown in FIG. 8D, the fibers 54 are arranged in parallel, and the tin plating layer 55B is solidified with the fibers 54 arranged in parallel. It is preferable.

  In the electric wire 5 obtained by the above manufacturing process, the fiber conductor 51 formed at one end is then attached by the conductor crimping pieces 81 and 81 of the terminal 80 in the attachment process, as shown in FIG. The terminal 80 is attached by crimping.

  Through the series of steps described above, the electric wire 5 shown in FIG. 7 covers the outer peripheral surface of the plurality of fibers 34, and the copper plated layer 35A made of copper formed for each fiber 34 and the outer peripheral surface by the copper plated layer 35A. And a tin plating layer 35B made of tin that further covers the outer peripheral surface of the copper plating layer 35A in a state where all the fibers 34 are covered inside, and the plurality of fibers 34 have a flat shape. The electric wire 4 according to the second embodiment shown in FIG. 6, which is integrally plated, is processed to produce the electric wire 4.

(First Modification of Manufacturing Method of Electric Wire 4 According to Second Embodiment)
Next, the 1st modification of the manufacturing method of the electric wire 4 which concerns on 2nd Embodiment is demonstrated.
In the first modified example described below, an example in which the electric wire 4 is manufactured by sequentially processing the electric wire 6 shown in FIG. 10 having the same configuration as the electric wire 2 according to the conventional example shown in FIG. 5 will be described. To do. That is, the electric wire 6 includes a conductive fiber conductor 61 and an insulating coating layer 62 as shown in FIG. The fiber conductor 61 is formed by twisting a plurality of conductors 63. The conductor 23 includes a fiber 64 and a single-layer plated layer 65 made of copper, which is a conductive metal formed by plating the surface of the fiber 64. In other words, the electric wire 6 has a plurality of fibers 64, the fibers 64 are plated with a conductive metal, and the outer peripheral surface is covered with the plating layer 65 formed on the outer peripheral surface of the fiber 64, and the plating layer 65, And a covering layer 62 formed of an insulating material that covers the outer peripheral surface of the plating layer 65 in a state where the bundled fibers 64 are located inside.

  FIG. 9 is a view showing a first modification of the method for manufacturing the electric wire 4, FIG. 9A shows an electric wire forming process for forming the electric wire 6, and FIG. 9B shows a fiber at one end of the electric wire 6. 9 (c) is a removing step for exposing the plating layer 65 covering the outer peripheral surface 64, and FIG. 9 (d) is an attaching step for attaching the tin tape 71 to the plating layer 65 at the exposed one end. FIG. 9E shows a melting process for melting the tin tape 71, FIG. 9E shows a solidification process for solidifying the melted tin tape 71 and plating the fibers 64 integrally, and FIG. It is a perspective view which shows the attachment process to attach. In the manufacturing method according to the first modification, generally, instead of melting and solidifying the plating layer previously formed on the fiber, the conductive metal tin tape 71 attached to the exposed plating layer 65 is melted. And different from the manufacturing method described above in that it is solidified. Hereinafter, the difference will be described in detail, and the same points as the manufacturing method described above will be omitted.

  In the manufacturing method according to the modified example, after the plating layer 65 covering the outer peripheral surface of the fiber 64 at one end of the electric wire 6 is exposed by the removing step shown in FIG. 9B, in the attaching step shown in FIG. 9C. The attachment device (not shown) winds and attaches a tin tape (attachment member) 70 formed of tin as the third conductive metal around the plating layer 65 at the one end. Thereby, a tin tape layer made of tin as the third conductive metal is formed at one end of the electric wire 5. And the electric wire feeder arrange | positions the fiber 64 in which the said tin tape layer was formed between a pair of type | molds 92 and 92 used in the melting process which is the next process arrange | positioned at predetermined intervals. Thereafter, in the melting step shown in FIG. 9D, the heating device heats the inside of the space 94 to a temperature lower than the melting point of copper and higher than the melting point of tin, for example, 600 ° C. When arranged in such a temperature environment, the tin tape 71 attached to the exposed plating layer 65 having a melting point lower than the internal temperature of the space 94 is melted and spreads into the space 94. At this time, the plating layer 65 made of copper having a melting point higher than the internal temperature does not melt. Thereafter, in the solidification step shown in FIG. 9 (e), the tin tape 71 melted in the melting step is solidified to have a shape conforming to the outer shape of the space 94, and the fibers 64 at one end of the electric wire 6 are integrated with the tin. Is plated. At this time, before solidifying the melted tin tape 71, it is preferable to arrange the fibers 64 in parallel and solidify the tin tape 71 in a state where the fibers 64 are arranged in parallel.

  Through the series of steps described above, the electric wire 6 shown in FIG. 10 covers the outer peripheral surface of the plurality of fibers 34, and the copper plating layer 35A made of copper formed for each fiber 34 and the outer peripheral surface by the copper plating layer 35A. And a tin plating layer 35B made of tin that further covers the outer peripheral surface of the copper plating layer 35A in a state where all the fibers 34 are covered inside, and the plurality of fibers 34 have a flat shape. The electric wire 4 according to the second embodiment shown in FIG. 6, which is integrally plated, is processed to produce the electric wire 4.

(Second modification of the method of manufacturing the electric wire 4 according to the second embodiment)
Next, the 2nd modification of the manufacturing method of the electric wire 4 which concerns on 2nd Embodiment is demonstrated.
In the second modification described below, as in the case of the first modification, the electric wire 6 shown in FIG. The example which manufactures 4 is demonstrated.

  11A and 11B are diagrams showing a second modification of the method for manufacturing the electric wire 4, FIG. 11A shows an electric wire forming process for forming the electric wire 6, and FIG. 11B shows a fiber at one end of the electric wire 6. FIG. 11 (c) shows a removal step for exposing the plating layer 65 covering the outer peripheral surface 64, FIG. 11 (c) shows an attachment step for attaching the tin paste 73 to the plating layer 65 at the exposed end, and FIG. 11 (d) shows a tin paste. FIG. 11 (e) is a perspective view showing an attaching process for attaching the terminal 80 to the manufactured electric wire 6. FIG. Hereinafter, the same points as in the manufacturing method described above will be omitted.

  In the wire forming step, first, as shown in FIG. 11A, the wire 6 is formed by a known manufacturing apparatus. And as shown to Fig.11 (a), an electric wire feeder is arrange | positioned between the pair of blades 91 and 91 for the coating removal used in the removal process which is the next process arrange | positioned at predetermined intervals. The electric wire 6 is arranged.

  In the removal step, the pair of blades 91, 91 move in a direction approaching each other, and as shown in FIG. 11B, the covering layer 62 at one end of the electric wire 6 is removed, and the fiber 64 at the one end is removed. The plating layer 65 covering the outer periphery of the substrate is exposed. And as shown in FIG.11 (b), an electric wire feeder is arrange | positioned in the said one end part between a pair of type | molds 92 and 92 used in the melting process which is a next process arrange | positioned at predetermined intervals. The electric wire 6 with the plating layer 65 exposed is disposed. As shown in FIG. 11C, the upper mold 92 of the molds 92 and 92 has a prismatic injection hole 75 for injecting a tin paste (adhesive) 73 to be described later. 93 (that is, the space above the upper surface and the space 94 communicate with each other).

  In the attaching process, first, as shown in FIG. 11 (c), the pair of molds 92, 92 move in a direction approaching each other until the opposing surfaces come into contact with each other, and a flat mold formed by the recesses 93, 93 is formed. The exposed plating layer 65 is accommodated in the rectangular cylindrical space 94. Then, as shown in FIG. 11 (c), the injection device (not shown) is heated to a temperature lower than the melting point of copper and higher than the melting point of tin, for example, 600 ° C., stored in the injection container 76. As a result, a tin paste (adhesive agent) 73, which is tin as the fourth conductive metal melted into a paste, is injected into the space 94. The injected tin paste 73 spreads inside the space 94 and adheres to the plating layer 65 inside the space 94.

  In the solidification step, the cooling device cools the inside of the space 94 to a temperature sufficiently lower than the melting point of tin, for example, room temperature. When cooled in this way, the tin paste 73 melted in the adhering step is solidified into a shape conforming to the outer shape of the space 94, and the fibers 64 at one end of the electric wire 6 are integrally plated with tin. Thereafter, when the pair of dies 92, 92 move in a direction away from each other, as shown in FIG. 11D, the electric wire 6 having the fiber conductor 61 formed at one end is obtained. At this time, before solidifying the melted tin paste 73, as shown in FIG. 11C, the fibers 64 are arranged in parallel, and the tin paste 73 is solidified in a state where the fibers 64 are arranged in parallel. preferable.

  After that, in the electric wire 6 obtained by the above manufacturing process, the fiber conductor 61 formed at one end is fixed by the conductor crimping pieces 81 and 81 of the terminal 80 in the attachment process, as shown in FIG. The terminal 80 is attached by crimping.

  Through the above steps, the electric wire 6 shown in FIG. 10 covers the outer peripheral surface of the plurality of fibers 34, and the outer peripheral surface is covered with the copper plating layer 35A made of copper formed for each fiber 34 and the copper plating layer 35A. And a tin plating layer 35B made of tin that further covers the outer peripheral surface of the copper plating layer 35A in a state where all the fibers 34 are located inside, and the plurality of fibers 34 are integrated into a flat shape. The plated electric wire 4 according to the second embodiment shown in FIG. 6 is processed to produce the electric wire 4.

  Below, the effect | action and effect of the fiber conductor in the electric wire which concern on embodiment, and the manufacturing method of an electric wire are demonstrated.

The fiber conductor 31 according to the embodiment includes a plurality of fibers 34 and a tin-plated layer 35B formed on the outer peripheral surface of the fiber 34 by integrally plating the plurality of fibers 34 with tin that is a conductive metal. Prepare.
Thereby, since the plurality of fibers 34 are integrally plated with tin, when a tensile stress is applied to the fiber conductor 31, it is easy to apply a force evenly to each fiber 34. For this reason, when there is variation in the length of each fiber 34, even if a tensile stress acts on the fiber conductor 31, a short fiber is less likely to break before a long fiber.
Therefore, according to the fiber conductor 31 which concerns on embodiment, the fiber conductor which improved the tensile strength can be provided.

In the fiber conductor 31 according to the embodiment, the plating layer 35 includes a copper plating layer 35A that is a first plating layer and a tin plating layer 35B that is a second plating layer, and the copper plating layer 35A. However, the outer peripheral surface of the plurality of fibers 34 is covered and formed for each fiber 34, and the tin plating layer 35B is covered with the outer peripheral surface by the copper plating layer 35A. The outer peripheral surface of the copper plating layer 35A is further covered.
Thereby, since the plating layer 35 is comprised by the 1st plating layer and the 2nd plating layer, tensile strength is high. For this reason, when a tensile stress acts on the fiber conductor 31, the short fiber is less likely to break before the long fiber.

In the fiber conductor 31 according to the embodiment, a plurality of fibers 34 are arranged in parallel.
Thereby, since the some fiber 34 is arrange | positioned in parallel, compared with the conventional fiber conductor comprised by twisting the fiber 34, the length of the fiber 34 does not arise easily. For this reason, when a tensile stress acts on the fiber conductor 31, the short fiber is less likely to break before the long fiber.

In the fiber conductor 31 according to the embodiment, the first plating layer is formed of copper, which is a conductive metal having higher conductivity than the second plating layer.
Thereby, since the plating layer formed of copper, which is a highly conductive metal, is arranged on the inside, good conductivity is added to the fibers 34. Further, by covering the outer peripheral surface with tin which is a relatively inexpensive metal, a fiber conductor having high tensile strength can be obtained at a low cost.

In the fiber conductor 31 according to the embodiment, the first plating layer is formed of copper, which is a conductive metal having a smaller ionization tendency than the second plating layer.
Accordingly, the first plating layer formed of copper, which is a metal having a low ionization tendency, is disposed inside, and the second plating formed of tin, which is a metal having a higher ionization tendency than the first plating layer. Since the layer is disposed so as to cover the outer peripheral surface thereof, when the fiber conductor 31 is used, it is formed of a metal (for example, aluminum) that has a higher ionization tendency than the first plating layer and the second plating layer. When the formed terminal is attached to the end of the fiber conductor 31, the potential difference between the terminal and the fiber conductor 31 can be reduced, and the occurrence of electrolytic corrosion between the terminal and the fiber conductor 31 can be suppressed.

In the fiber conductor 31 according to the embodiment, the first plating layer is formed of copper, and the second plating layer is formed of tin. Copper is more conductive than tin and less prone to ionization.
For this reason, according to the fiber conductor 31 which concerns on embodiment, favorable electroconductivity can be added to a fiber and it can suppress that an electric corrosion arises between a terminal and a fiber conductor.

Moreover, the manufacturing method of the electric wire according to the present embodiment includes the fiber 54 (64) and the plating layer formed on the outer peripheral surface of the fiber 54 (64) by plating the fiber 54 (64) with a conductive metal. 55 (65) and the plating layer 55 (65) cover the outer peripheral surface, and the insulating property that covers the outer peripheral surface of the plating layer 55 (65) with the bundled fibers 54 (64) positioned inside An electric wire forming step of forming an electric wire 5 (6) including a covering layer 52 (62) formed of a material; and removing the covering layer 52 (62) at one end of the electric wire 5 (6) The step of exposing the plating layer 55 (65) covering the outer peripheral surface of the fiber 54 (64) in the portion, and the conductive layer forming the plating layer 55 (65) is used as the plating layer 55 (65) in the exposed one end. Temperature ring higher than the melting point of porous metal Including a melting step of melting and arranged below, and a solidifying step of plating integrally fiber 54 (64) at one end and allowed to solidify molten plating layer 55 (65).
Thus, the fiber 54 (64), the plated layer 55 (65) formed of the conductive metal on the outer peripheral surface of the fiber 54 (64), and the insulating material covering the outer peripheral surface of the plated layer 55 (65) Based on the electric wire 5 (6) including the covering layer 52 (62) formed by the above, the electric wire 4 in which the fibers 34 are integrally plated with the conductive metal is obtained. In the electric wire 4 thus obtained, since at least two fibers 34 are integrally plated with a conductive metal, when a tensile stress is applied to the electric wire 4, a force is equally applied to each fiber 34. easy. For this reason, when there is variation in the length of each fiber 34, even if a tensile stress acts on the electric wire 4, a short fiber is less likely to break before a long fiber.

In the electric wire manufacturing method according to the present embodiment, in the electric wire forming process, the plating layer 55 covers the outer peripheral surface of each of the fibers 54, and the first plating layer is formed of copper as the first conductive metal. 55A and a second plating layer formed of tin as a second conductive metal having a lower melting point than copper, which is the first conductive metal, and further covering the outer peripheral surfaces of the first plating layer 55A 55B is formed. In the melting step, the plated layer 55 is disposed in a temperature environment lower than the melting point of copper, which is the first conductive metal, and higher than the melting point of tin, which is the second conductive metal. The plating layer 55B is melted.
Thereby, the plating layer 55 covers the outer peripheral surface of each of the fibers 54, and the first plating layer 55A formed of copper, and further covers the outer peripheral surface of each of the first plating layers 55A. The melting point is higher than that of copper. Based on the electric wire 5 having the second plating layer 55B formed of low tin, the electric wire 4 plated integrally with the first plating layer 35A and the second plating layer 35B is obtained. In the electric wire 4 thus obtained, the plating layer 35 is constituted by the first plating layer 35A and the second plating layer 35B, and therefore has high tensile strength. For this reason, when a tensile stress acts on the fiber conductor 31, the short fiber is less likely to break before the long fiber.

Moreover, the manufacturing method of the electric wire which concerns on this embodiment is 3rd electroconductivity whose melting | fusing point is lower than melting | fusing point of copper which is an electroconductive metal which forms the plating layer 65 in the electric wire 6 between a removal process and a fusion | melting process. It further includes an attaching step of forming a tin tape layer by attaching a tin tape (attachment member) 70 formed of tin as a metal to the plated layer 65 at the exposed one end. In the melting step, the tin tape layer is placed and melted in a temperature environment lower than the melting point of copper forming the plating layer 65 and higher than the melting point of tin. In the solidification step, the molten tin tape layer is solidified. Let
As a result, the tin tape 71 prepared separately from the electric wire 6 is adhered to the plating layer 65 at one end of the electric wire 6 to form a tin tape layer, and then melted and solidified, thereby at least two fibers. An electric wire 4 in which 34 is integrally plated with a conductive metal is obtained. For this reason, it is not necessary to previously form a plating layer on the electric wire 6 for melting and solidifying and integrally plating the fibers 64, so that the work process can be simplified and the cost can be reduced.

The electric wire manufacturing method according to the present embodiment includes a fiber 64, a plated layer 65 formed on the outer peripheral surface of the fiber 64 by plating the fiber 64 with copper as a conductive metal, and the plated layer. 65. An electric wire that forms an electric wire 6 including an outer peripheral surface covered with 65 and a covering layer 62 formed of an insulating material that covers the outer peripheral surface of the plated layer 65 in a state where the bundled fibers 64 are located inside. The forming step, the removing step of removing the covering layer 62 at one end of the electric wire 6 to expose the plating layer 65 covering the outer peripheral surface of the fiber 64 at the one end, and the melting point of copper forming the plating layer 65 A tin paste (adhesive) 73 formed of tin as a low fourth conductive metal is disposed and melted in a temperature environment lower than the melting point of copper forming the plating layer 65 and higher than the melting point of tin. Let melt An adhesion step of attaching the tin paste 73 to the plating layer 65 at one end of the exposed electric wire 6; a solidification step of solidifying the attached tin paste 73 and plating the fibers 64 at the one end integrally; including.
Thereby, the tin paste 73 prepared separately from the electric wire 6 and melted is attached to the plating layer 65 at one end of the electric wire, and then solidified, whereby the fibers 34 are integrally plated with the conductive metal. An electric wire 4 is obtained. For this reason, it is not necessary to previously form on the electric wire 4 a plating layer for integrally plating the fibers 64 by melting and solidifying, and the work process can be simplified and the cost can be reduced.

In the electric wire manufacturing method according to the present embodiment, in the solidification step, the plating layer 55 (65) is solidified so that the outer shape of the fibers 54 (64) at one end portion plated integrally is flat.
Thereby, since the external shape of the fiber 34 in the obtained electric wire 4 is a flat type, the fiber length is less likely to vary as compared with a conventional fiber conductor configured by twisting the fiber. For this reason, when a tensile stress acts on the fiber conductor 31, the short fiber is less likely to break before the long fiber.

Furthermore, with reference to FIG. 12 and FIG. 13, a problem different from the decrease in tensile strength due to the above-described reason in the prior art will be described. Hereinafter, the case where the terminal 180 is connected to the fiber conductor 111 as shown in FIG. 12 will be described.
12A and 12B are explanatory diagrams showing a connection form between the terminal 180 and the fiber conductor 111. FIG. 12A shows a case of one-stage connection, FIG. 12B shows a case of two-stage connection, and FIG. FIG. 12D is a cross-sectional view showing an example of a connection form at the time of actual crimping. FIG. FIG. 13 is an explanatory diagram showing the relationship between the connection form between the terminal and the fiber conductor and the connection resistance between the terminal and the fiber conductor, and each graph shows the distance between the terminal core wires in the case of one-stage connection in order from the left. Resistance, inter-terminal resistance and inter-core resistance in case of two-stage connection, inter-terminal resistance and inter-core resistance in case of four-stage connection, and inter-terminal resistance and inter-core resistance during actual crimping Yes.

  When connecting the fiber conductor 111 and the terminal 180, as shown in FIG. At this time, the electrical resistance (terminal core wire resistance) between the terminal 180 and the conductor 113 of the fiber conductor 111 is relatively small, and the electrical resistance between the conductors 113 (core wire resistance) is relatively large. The inventors are aware. As shown in FIG. 11, the contact area between the conductors 113 increases as the number of stages of the conductors 113 crimped by the terminals 180 increases. For this reason, as shown in FIG. 11A, the configuration in which the conductors 113 are arranged in one stage is most preferable. However, since the conductors 113 are independent from each other, it is difficult to manage the number of stages. It is expected that the shape is sometimes as shown in FIG. For this reason, as shown in FIG. 12, as the number of core wires increases and the number of conductors 113 crimped by the terminal 180 increases, the resistance between the core wires increases, and the distance between the terminal 180 and the fiber conductor 111 increases. The inventors of the present application recognize that the connection resistance generated in the above is increased.

On the other hand, in the fiber conductor 31 according to the embodiment, a plurality of fibers 34 are integrally plated in a flat shape.
Thereby, since each fiber 34 is plated integrally and the arrangement | positioning of the fiber 34 can be defined previously, the step number at the time of crimping | compression-bonding can be managed easily. In addition, since the number of stages of the fibers 34 that are crimped by the terminals 80 connected to the fiber conductors 31 and that are covered with the plating layer 35 can be set smaller than before, the inter-core resistance can be reduced, and the terminals 80 and the fiber conductors 31 An increase in connection resistance occurring during the period can be suppressed.

  In addition, as shown in FIG. 11A, the number of conductors 113 to be crimped to the terminal 180 increases and the contact area between the conductors 113 increases, not only between the terminal 180 and the conductor 113 but also the conductor. Since a contact load is also generated between the terminals 113, the contact load between the terminal 180 and the fiber conductor 111 may vary, and the tensile strength of the fiber conductor 111 may be reduced.

On the other hand, in the fiber conductor 31 according to the embodiment, a plurality of fibers 34 are integrally plated.
Thereby, since a crimping load acts on each fiber equally, it can control that a contact load between terminal 80 connected to fiber conductor 31 and fiber conductor 31 arises, and tensile strength of fiber conductor 31 can be controlled. Can be prevented. Further, since the plurality of fibers 34 are integrally plated, fraying of the fiber conductor 31 can be prevented.

  The technical scope of the present invention is not limited to the embodiment described above. The above-described embodiments can be accompanied by various modifications and improvements within the technical scope of the present invention.

For example, the fiber conductor 31 according to the first embodiment has a configuration in which each fiber 34 is arranged in parallel, with six fibers in the horizontal direction, three in the vertical direction, and evenly spaced in each direction. However, the number and arrangement of the fibers 34 are not limited to this. Regarding the number of fibers, it is sufficient that at least two fibers 34 are provided. In addition, regarding the arrangement, the fibers 34 may not be arranged in a lattice pattern as in the present embodiment, and for example, the fibers 34 may be arranged at irregular intervals in each direction, or It is good also as a structure arranged in the shape of a ring.
Moreover, regarding the arrangement, the fiber conductor 31 according to the present embodiment has a configuration in which the plurality of fibers 34 are arranged in parallel, but a configuration in which the fibers 34 are arranged in parallel may be used. More specifically, for example, the plurality of fibers 34 may be arranged in parallel so as not to cross each other. Also with this configuration, since the plurality of fibers 34 are arranged substantially in parallel, the length of the fibers 34 is less likely to vary than a conventional fiber conductor configured by twisting the fibers 34.

  In the fiber conductor 31 according to the embodiment, the plating layer 35 formed on the outer peripheral surface of the fiber 34 includes a copper plating layer 35 </ b> A that covers the outer peripheral surface of each fiber 34, and a copper plating layer 35 </ b> A that covers the outer peripheral surface of the fiber 34. In this case, the plating layer 35 formed on the outer peripheral surface of the fiber 35 has only the tin plating layer 35B covering the outer peripheral surface of the fiber 34. It doesn't matter. In other words, the fiber 34 may be integrally plated with tin, and only the tin plating layer 35 </ b> B may be formed on the outer peripheral surface of the fiber 34 as the plating layer 35. Even in this configuration, since the plurality of fibers 34 are integrally plated with tin, when a tensile stress is applied to the fiber conductor 31, a force is easily applied to each fiber 34 evenly.

In the method for manufacturing an electric wire according to the embodiment, copper is used as the first conductive metal, and tin is used as the second conductive metal, the third conductive metal, and the fourth conductive metal. As described above, the types of these conductive metals can be changed within the technical scope of the present invention. For example, silver (melting point: about 1000 ° C.) is used as the first conductive metal, and the second conductive metal is used as the second conductive metal. Zinc (melting point: about 400 ° C.) may be used.
In the first and second modifications of the method for manufacturing the electric wire 4 according to the second embodiment, the case where copper is used as the material for the single-layer plating layer has been described. The type can be changed within the technical scope of the present invention. For example, nickel (melting point: about 1500 ° C.), silver, or the like may be used.

DESCRIPTION OF SYMBOLS 1 Electric wire 11 Fiber conductor 12 Cover layer 13 Conductor 14 Fiber 15 Plating layer 15A Copper plating layer 15B Tin plating layer 3 Electric wire 31 Fiber conductor 32 Cover layer 34 Fiber 35 Plating layer 35A Copper plating layer 35B Tin plating layer 2 Electric wire 21 Fiber conductor 22 Coating layer 23 Conductor 24 Fiber 25 Plating layer

Claims (8)

At least two fibers;
The at least two fibers are integrally plated with a conductive metal, and a plating layer formed on the outer peripheral surface of the fibers;
A fiber conductor characterized by comprising: The plating layer has a first plating layer and a second plating layer,
The first plating layer covers the outer peripheral surface of the fiber and is formed for each of the fibers,
The second plating layer further covers the outer peripheral surface of the first plating layer in a state where the outer peripheral surface is covered by the first plating layer and at least two of the fibers are located inside;
The fiber conductor according to claim 1. The at least two fibers are arranged in parallel;
The fiber conductor according to claim 1 or 2, characterized in that. The at least two fibers, the at least two fibers are each plated with a conductive metal, the plating layer formed on the outer peripheral surface of the fiber, and the outer peripheral surface is covered and bundled by the plating layer An electric wire forming step of forming an electric wire comprising: a covering layer formed of an insulating material that covers an outer peripheral surface of the plating layer in a state where at least two fibers are located on the inside;
Removing the covering layer at one end of the electric wire to expose the plating layer covering the outer peripheral surface of the fiber at the one end; and
A melting step of disposing and melting the plated layer at the exposed one end portion in a temperature environment higher than the melting point of the conductive metal forming the plated layer;
A solidification step of solidifying the molten plating layer and integrally plating the at least two fibers at the one end;
The manufacturing method of the electric wire characterized by including. In the electric wire forming step, the plating layer covers a peripheral surface of each of the at least two fibers, a first plating layer formed of a first conductive metal, and an outer periphery of each of the first plating layers Forming the electric wire further comprising a second plating layer formed of a second conductive metal that further covers a surface and has a melting point lower than that of the first conductive metal;
In the melting step, the plating layer is disposed in a temperature environment lower than the melting point of the first conductive metal and higher than the melting point of the second conductive metal to melt the second plating layer. ,
The method of manufacturing an electric wire according to claim 4. Between the removing step and the melting step, the plating at the one end where the adhesion member formed by the third conductive metal having a melting point lower than the melting point of the conductive metal forming the plating layer is exposed. Further comprising an attaching step for attaching to the layer;
In the melting step, the adhesion member is disposed and melted in a temperature environment lower than the melting point of the conductive metal forming the plating layer and higher than the melting point of the third conductive metal,
In the solidification step, the molten adhesion member is solidified.
The method of manufacturing an electric wire according to claim 4. The at least two fibers, the at least two fibers are each plated with a conductive metal, the plating layer formed on the outer peripheral surface of the fiber, and the outer peripheral surface is covered and bundled by the plating layer An electric wire forming step of forming an electric wire comprising: a covering layer formed of an insulating material that covers an outer peripheral surface of the plating layer in a state where at least two fibers are located on the inside;
Removing the covering layer at one end of the electric wire to expose the plating layer covering the outer peripheral surface of the fiber at the one end; and
An adhesive formed of a fourth conductive metal having a melting point lower than that of the conductive metal forming the plated layer is applied to the fourth conductive metal lower than the melting point of the conductive metal forming the plated layer. An adhesion step of placing and melting in a temperature environment higher than the melting point, and adhering the melted adhesive to the plated layer at the exposed one end;
A solidification step of solidifying the adhesive adhered to the plating layer and integrally plating the at least two fibers at the one end;
The manufacturing method of the electric wire characterized by including. In the solidification step, the plating layer is solidified so that the outer shape of the at least two fibers in the one end portion plated integrally is a flat shape.
The method for producing an electric wire according to claim 4 or 5, wherein

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