JP2013020833A - Wire coupling structure, wire coupling method and wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire coupling structure capable of coupling the end of a first conductor and the end of a second conductor reliably even if the diameters of the first and second conductors are different, and to provide a wire coupling method and a wire for use therein.SOLUTION: In a wire coupling structure 1, the end 11A of a first conductor 11 provided in a first wire 10, and the end 21A of a second conductor 21 provided in a second wire 20 and having a diameter different from that of the first conductor 11 are coupled. The end 21A of a second conductor 21 is coupled with the end of the first conductor 11 by pressure welding, while matching with the cross-sectional shape of the first conductor 11 in the short direction SD of wire orthogonal to the long direction LD of wire.

Description

  The present invention relates to an electric wire coupling structure for coupling ends of conductive wires, an electric wire coupling method, and electric wires used in these.

  2. Description of the Related Art Conventionally, there has been a technique for joining the end portions of conductive wires, specifically, the end portion of the first conductive wire provided on the first electric wire and the end portion of the second conductive wire provided on the second electric wire by cold welding. It is known (see, for example, Patent Document 1). The cold welding is a method of bonding each other by causing an atomic bond (metal bond) between the first and second conductors (metal material) by pressurizing and deforming each end. is there. That is, an oxide film is formed on the end surface of each end portion of the first conducting wire and the second conducting wire in combination with oxygen in the air. The oxide film is removed, and atoms are bonded to each other by causing atomic bonds at the respective ends of the first conductor and the second conductor.

  Here, as conditions for performing the cold welding, the diameters of the first conductor and the second conductor need to be the same (same diameter). Thereby, the edge part of a 1st conducting wire and the edge part of a 2nd conducting wire can be combined firmly by cold pressure welding.

JP-A-3-40382 (first and second pages, first and second figures)

  However, in the above-described conventional technique, the diameters of the first and second conductors are the same. Therefore, when the diameters of the first and second conductors are different, removal of an oxide film or atomic bonding (metal bonding) There will be places where the (joining) is not done completely. As a result, there is a problem that it is difficult to connect the end portion of the first conducting wire and the end portion of the second conducting wire.

  Therefore, the present invention provides an electric wire coupling structure and electric wire coupling that can reliably bond the end portion of the first conductive wire and the end portion of the second conductive wire even when the diameters of the first conductive wire and the second conductive wire are different from each other. It aims at providing the method and the electric wire used for these.

  In order to solve the above-described problems, the present invention has the following features. First, the first feature of the present invention is that an end portion (end portion 11A) of a first conducting wire (first conducting wire 11) provided in a first electric wire (first electric wire 10) and a second electric wire (second electric wire 20). ) And an end portion (end portion 21A) of a second conductor (second conductor 21) having a diameter different from the diameter of the first conductor is coupled to an electric wire coupling structure (wire coupling structure 1). Then, the end of the second conducting wire matches the first conducting wire in the cross-sectional shape of the first conducting wire in the wire short direction (wire short direction SD) orthogonal to the wire long direction (wire long direction LD). The gist is that it is connected to the end of the conductor by pressure welding.

  According to such a feature, the end portion of the second conducting wire is coupled to the end portion of the first conducting wire by pressure welding in a state that matches the cross-sectional shape of the first conducting wire. Thereby, even if each diameter of a 1st conducting wire and a 2nd conducting wire differs, the edge part of a 1st conducting wire and the place where an oxide film removal and an atomic bond (metal bonding) are not performed arise. The end portion of the second conductor can be reliably coupled. As a result, in a wire harness for an automobile, usable parts increase and parts (terminals and the like) for joining ends are not necessary, thereby contributing to cost reduction, weight reduction, size reduction, and the like. .

  A second feature of the present invention relates to the first feature of the present invention, wherein the pressure welding is performed by pressurizing and deforming an end portion of the first conductor and an end portion of the second conductor. The gist is that it is cold pressure welding that causes atomic bonding.

  A third feature of the present invention relates to the first or second feature of the present invention, and is summarized in that the second conductive wire is constituted by a plurality of conductive wires.

  According to a fourth aspect of the present invention, there is provided an end portion of the first conducting wire provided on the first electric wire, and an end portion of the second conducting wire provided on the second electric wire and having a diameter different from the diameter of the first conducting wire. A wire coupling method for coupling, a step of processing an end portion of the second conductive wire so as to coincide with a cross-sectional shape of the first conductive wire in a short direction of the wire perpendicular to the longitudinal direction of the wire (step A); The present invention includes a step (step B) of joining the end portion of the first conducting wire and the end portion of the second conducting wire by pressure welding.

  A fifth feature of the present invention is according to the fourth feature of the present invention, and in the step of processing the end portion of the second conductor, the end portion of the second conductor is cross-sectioned by heat or pressure. The gist is to match the shape.

  A sixth feature of the present invention is that a coupled conductor (second conductor) coupled to the end (end portion 11A) of the mated coupled conductor (first conductor 11) and having a diameter different from the diameter of the coupled conductor. An electric wire (second electric wire 20) provided with a conducting wire 21), wherein an end portion (end portion 21A) of the coupled conducting wire matches a cross-sectional shape of the coupled conducting wire in a wire short-side direction orthogonal to the wire longitudinal direction The gist is that it has been processed.

  According to the feature of the present invention, even when the diameters of the first conductor and the second conductor are different from each other, the wire coupling structure capable of reliably coupling the end of the first conductor and the end of the second conductor, It is possible to provide an electric wire coupling method and electric wires used in these methods.

FIG. 1 is a perspective view showing a wire coupling structure 1 according to the present embodiment. Fig.2 (a) is a perspective view which shows only the 1st electric wire 10 which concerns on this embodiment, FIG.2 (b) is a front view (FIG.2 (a)) which shows the 1st conducting wire 11 which concerns on this embodiment. (A arrow view). Fig.3 (a) is a perspective view which shows only the 2nd electric wire 20 which concerns on this embodiment, FIG.3 (b) is a front view (FIG.3 (a)) which shows the 2nd conducting wire 21 which concerns on this embodiment. (B arrow view). 4A is a perspective view showing the end portion 21A of the second conducting wire 21 before processing, and FIG. 4B is a perspective view showing the end portion 21A of the second conducting wire 21 during processing. 4C is a cross-sectional view showing the end portion 21A of the second conducting wire 21 during the processing, and FIG. 4D is a perspective view showing the end portion 21A of the second conducting wire 21 after the processing. FIG. FIG. 5A is a perspective view showing the second conductor 21 before processing, FIG. 5B is a perspective view showing the second conductor 21 after processing, and FIG. FIG. 5D is a side view showing the first conducting wire 11 and the second conducting wire 21, and FIG. 5D is a side view showing the coupling between the first conducting wire 11 and the second conducting wire 21.

  Next, an embodiment of a wire coupling structure according to the present invention will be described with reference to the drawings. Specifically, (1) configuration of the wire coupling structure, (2) processing of the end portion of the second conductor, (3) wire coupling method, (4) action / effect, (5) other embodiments will be described. To do.

  In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones.

  Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, the part from which the relationship and ratio of a mutual dimension differ also in between drawings may be contained.

(1) Structure of electric wire coupling structure First, the structure of the electric wire coupling structure 1 which concerns on this embodiment is demonstrated, referring drawings. FIG. 1 is a perspective view showing a wire coupling structure 1 according to the present embodiment. Fig.2 (a) is a perspective view which shows only the 1st electric wire 10 which concerns on this embodiment, FIG.2 (b) is a front view (FIG.2 (a)) which shows the 1st conducting wire 11 which concerns on this embodiment. (A arrow view). Fig.3 (a) is a perspective view which shows only the 2nd electric wire 20 which concerns on this embodiment, FIG.3 (b) is a front view (FIG.3 (a)) which shows the 2nd conducting wire 21 which concerns on this embodiment. (B arrow view).

  As shown in FIG. 1, in the electric wire coupling structure 1, the end portion 11 </ b> A of the first conductive wire 11 provided on the first electric wire 10 and the end portion 21 </ b> A of the second conductive wire 21 provided on the second electric wire 20 are combined. .

  As shown in FIGS. 1 and 2, the first electric wire 10 is formed by a first conductor 11 as a “mating-coupled conductor” made of a single wire, and a first insulator 12 that covers the first conductor 11. Has been. Moreover, the cross-sectional shape of the 1st conducting wire 11 in the electric wire transversal direction SD orthogonal to the electric wire longitudinal direction LD has comprised the substantially circular shape. The end portion 11A of the first conducting wire 11 is coupled to the second electric wire 20 (the end portion 21A of the second conducting wire 21).

  As shown in FIGS. 1 and 3, the second electric wire 20 includes a second conductive wire 21 as a “coupled conductive wire” formed by twisting a plurality (seven in this embodiment) of conductive wires, A second insulator 22 covering the conductive wire 21 is formed. Further, the second conducting wire 21 has a diameter different from the diameter of the first conducting wire 11. Furthermore, the cross-sectional shape of the second conducting wire 21 in the electric wire transverse direction SD is different from the cross-sectional shape of the first conducting wire 11 described above before the processing (see FIGS. 3B and 4A). For this reason, as shown in FIG.1 and FIG.3, the edge part 21A of the 2nd conducting wire 21 is processed so that it may correspond with the cross-sectional shape of the 1st conducting wire 11 by a process (heat | fever or pressure). That is, the end portion 21 </ b> A of the second conducting wire 21 is coupled to the end portion 11 </ b> A of the first conducting wire 11 by pressure welding in a state that matches the cross-sectional shape of the first conducting wire 11.

  Note that “matching” shown here is not necessarily limited to the case where the end 21A of the second conducting wire 21 completely matches the cross-sectional shape of the first conducting wire 11, but within a range including a slight error (± 10 mm). I just need it.

  Further, pressure welding (pressure welding) is a general term for a welding method in which welding is performed by applying mechanical pressure or heat to a joint portion (welded joint) without melting the joint surface (joint surface). For example, pressure welding includes pressure welding methods such as friction welding, forging welding, diffusion welding, hot welding, cold welding, explosion welding, and gas welding.

  In the present embodiment, the pressure welding is a cold pressure welding in which the end portion 11A of the first conducting wire 11 and the end portion 21A of the second conducting wire 21 are subjected to pressure deformation to cause atomic bonding between them. . That is, in the present embodiment, the first conducting wire 11 and the second conducting wire 21 are formed of a material that can be cold-welded (for example, copper, aluminum, tin, zinc, silver, gold, nickel, brass, magnesium, lead). Is done.

(2) Processing of End Part of Second Conductor Next, the processing of the end part 21A of the second conductor 21 described above will be described with reference to the drawings. 4A is a perspective view showing the end portion 21A of the second conducting wire 21 before processing, and FIG. 4B is a perspective view showing the end portion 21A of the second conducting wire 21 during processing. 4C is a cross-sectional view showing the end portion 21A of the second conducting wire 21 during the processing, and FIG. 4D is a perspective view showing the end portion 21A of the second conducting wire 21 after the processing. FIG.

  The processing of the end 21 </ b> A of the second conducting wire 21 is performed using the end processing apparatus 100. As shown in FIG. 4, the end portion processing apparatus 100 includes a die 110 that processes one side of the end portion 21 </ b> A of the second conducting wire 21, and an end portion 21 </ b> A of the second conducting wire 21 that is fitted to the die 110. And a punch 120 for processing the other side.

  The die 110 is formed with a substantially rectangular groove 111 into which the punch 120 is inserted. A semicircular processed groove 112 for processing one side of the end portion 21 </ b> A of the second conducting wire 21 is formed on the bottom surface of the groove portion 111. In addition, a semicircular processing groove 121 for processing the other side of the end portion 21 </ b> A of the second conductive wire 21 is formed at one end of the punch 120 (the side fitted to the die 110).

  First, as shown in FIG. 4A, the end portion 21 </ b> A of the second conductive wire 21 is set in the machining groove 112 of the die 110. At this time, the cross-sectional shape of the second conducting wire 21 is different from the cross-sectional shape of the first conducting wire 11.

  Next, as shown in FIGS. 4B and 4C, the punch 120 is fitted into the groove portion 111 of the die 110, and the processed groove 112 and the processed groove 121 have a circular cross section by matching. . In the processed groove 112 and the processed groove 121, the end portion 21 </ b> A of the second conducting wire 21 is processed (heat or pressure), and the end portion 21 </ b> A of the second conducting wire 21 matches the cross-sectional shape of the first conducting wire 11. Compress to a circular shape like this.

  Then, as shown in FIG. 4D, after the end portion 21A of the second conducting wire 21 is processed, the punch 120 is removed from the groove portion 111 of the die 110, and the second conducting wire 21 is used for end processing. Pull out from the apparatus 100 (processed groove 112). Thereby, the end portion 21 </ b> A of the second conductive wire 21 that matches the cross-sectional shape of the first conductive wire 11 is formed.

(3) Electric wire coupling method Next, an electric wire coupling method for coupling the end portion 11A of the first conductive wire 11 and the end portion 21A of the second conductive wire 21 will be described with reference to the drawings. FIG. 5A is a perspective view showing the second conductor 21 before processing, FIG. 5B is a perspective view showing the second conductor 21 after processing, and FIG. FIG. 5D is a side view showing the first conducting wire 11 and the second conducting wire 21, and FIG. 5D is a side view showing the coupling between the first conducting wire 11 and the second conducting wire 21.

  The electric wire coupling method includes at least a step A for processing the end portion 21A of the second conducting wire 21 and a step B for coupling the end portion 11A of the first conducting wire 11 and the end portion 21A of the second conducting wire 21.

  As shown to Fig.5 (a), the cross-sectional shape of the 2nd conducting wire 21 differs from the cross-sectional shape of the 1st conducting wire 11 before a process. Therefore, as shown in FIGS. 5B and 5C, in step A, the second conductor 21 is matched with the cross-sectional shape of the second conductor 21 by the processing (heat or pressure) described above. The end 21A is processed.

  Next, as shown in FIG. 5D, in step B, the end portion 11A of the first conducting wire 11 and the end portion 21A of the second conducting wire 21 are joined by pressure welding (in this embodiment, cold welding). To do. Specifically, an oxide film is formed on the end portion 11A of the first conducting wire 11 and the end portion 21A of the second conducting wire 21 by being combined with oxygen in the air. The oxide film is removed, and the end portion 11A of the first conducting wire 11 and the end portion 21A of the second conducting wire 21 are bonded to each other by causing an atomic bond.

(4) Action / Effect In the present embodiment described above, the end portion 21A of the second conducting wire 21 is coupled to the end portion 11A of the first conducting wire 11 by pressure welding in a state that matches the cross-sectional shape of the first conducting wire 11. Is done. Thereby, even if it is a case where each diameter of the 1st conducting wire 11 and the 2nd conducting wire 21 differs, the location where the removal of an oxide film and an atomic bond (metal bond) are not performed does not arise, but the 1st conducting wire 11 The end portion 11A and the end portion 21A of the second conducting wire 21 can be reliably coupled. As a result, in a wire harness for an automobile, usable parts increase and parts (terminals and the like) for joining ends are not necessary, thereby contributing to cost reduction, weight reduction, size reduction, and the like. .

  In the present embodiment, cold welding is used as pressure welding. Thereby, the reliability in the coupling | bonding of the edge part 11A of the 1st conducting wire 11 and the edge part 21A of the 2nd conducting wire 21 can be improved more. Furthermore, this is particularly effective when the diameter of the first conductor 11 and the cross-sectional shape are different, such as when the second conductor 21 is formed by twisting a plurality of conductors.

(5) Other Embodiments As described above, the contents of the present invention have been disclosed through the embodiments of the present invention. However, it is understood that the description and drawings constituting a part of this disclosure limit the present invention. Should not. From this disclosure, various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art.

  For example, the embodiment of the present invention can be modified as follows. Specifically, although it has been described that the pressure welding is a cold pressure welding, it is not limited to this, and other pressure welding methods may be used.

  Moreover, although the 2nd conducting wire 21 demonstrated as what was comprised by several (7 in this embodiment) conducting wire, it is not limited to this, The edge part of the 2nd conducting wire 21 before a process process As long as 21A is different from the diameter and cross-sectional shape of the first conducting wire 11, it may be a single wire.

  Further, the processing of the end portion 21A of the second conducting wire 21 has been described as being performed using the end portion processing apparatus 100, but the processing is not limited to this, and the end portion 21A of the second conducting wire 21 is not limited to this. Any other device or jig may be used as long as it can be compressed.

  As described above, the present invention naturally includes various embodiments that are not described herein. Therefore, the technical scope of the present invention is determined only by the invention specifying matters according to the scope of claims reasonable from the above description.

DESCRIPTION OF SYMBOLS 1 ... Electric wire coupling structure 10 ... 1st electric wire 11 ... 1st conducting wire (coupled conducting wire)
11A ... End of first conductor 12 ... First insulator 20 ... Second electric wire (electric wire)
21 ... Second conductor (coupled conductor)
21A ... End of second conductor 22 ... Second insulator LD ... Electric wire longitudinal direction SD ... Electric wire short direction

Claims (6)

An electric wire coupling structure in which an end portion of a first conducting wire provided on a first electric wire and an end portion of a second conducting wire provided on a second electric wire and having a diameter different from the diameter of the first conducting wire are combined. ,
The end portion of the second conducting wire is joined to the end portion of the first conducting wire by pressure welding in a state where the end portion of the second conducting wire matches the cross-sectional shape of the first conducting wire in the transverse direction of the wire orthogonal to the longitudinal direction of the wire. Characteristic wire connection structure. The wire coupling structure according to claim 1,
The wire welding structure according to claim 1, wherein the pressure welding is a cold pressure welding in which an end portion of the first conducting wire and an end portion of the second conducting wire are subjected to pressure deformation to cause atomic bonding between each other. The wire coupling structure according to claim 1 or 2,
The electric wire coupling structure, wherein the second conducting wire is constituted by a plurality of conducting wires. A wire coupling method for coupling an end portion of a first conducting wire provided on a first electric wire and an end portion of a second conducting wire provided on a second electric wire and having a diameter different from the diameter of the first conducting wire,
Step A of processing the end of the second conductive wire so as to match the cross-sectional shape of the first conductive wire in the short direction of the wire perpendicular to the longitudinal direction of the wire;
An electric wire coupling method comprising: a step B of coupling an end portion of the first conducting wire and an end portion of the second conducting wire by pressure welding. The wire coupling method according to claim 4,
In the step A of processing the end portion of the second conducting wire, the end portion of the second conducting wire is matched with the cross-sectional shape of the first conducting wire by heat or pressure. An electric wire that is coupled to an end of a coupled wire on the other side and includes a coupled wire having a diameter different from the diameter of the coupled wire,
An end of the coupled conducting wire is processed so as to coincide with a cross-sectional shape of the coupled conducting wire in a short direction of the wire perpendicular to the longitudinal direction of the wire.

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