JP2017076497A - Cluster of a plurality of wires and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to readily improve a bonding strength between a plurality of exposed core wire parts.SOLUTION: A cluster 10 of a plurality of wires includes a first wire 20 that contains a first core wire 22 and a first cladding part 24 cladding the first core wire 22 and in which a part of the first core wire 22 is made a first exposed core wire part 23 exposed from the first cladding part 24, and, a second wire 30 that contains a second core wire 32 and a second cladding part 34 cladding the second core wire 32 and in which a part of the second core wire 32 is made a second exposed core wire part 33 exposed from the second cladding part 34. With the first exposed core wire part 23 bent so as to dispose the second exposed core wire part 33 therebetween, the first exposed core wire part 23 and the second exposed core wire part 33 are joined.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for connecting exposed core portions of a plurality of electric wires.

  Patent Document 1 discloses a technique for ultrasonically connecting a copper conductor and an aluminum conductor in a state where the copper conductor surrounds the aluminum conductor in order to connect the aluminum conductor and the copper conductor with a high fixing force.

JP 2010-113946 A

  However, in Patent Document 1, it is necessary to insert an aluminum conductor into a copper conductor so that a plurality of copper strands of the copper conductor surround the aluminum conductor. Such work is complicated, has poor workability, and may increase costs.

  Then, an object of this invention is to enable it to improve the joining strength of several exposed core part easily.

  In order to solve the above problem, an assembly of a plurality of electric wires according to a first aspect includes a first core wire and a first covering portion that covers the first core wire, and a part of the first core wire is the first core wire. 1st electric wire made into the 1st exposure core line part exposed from 1 covering part, The 2nd covering part which covers the 2nd core line and the 2nd core line, and a part of said 2nd core line is said 2nd covering A second electric wire that is a second exposed core portion exposed from the first portion, and the first exposed core portion is bent so as to dispose the second exposed core portion therebetween. The exposed core wire portion and the second exposed core wire portion are joined.

  A 2nd aspect is an aggregate | assembly of the some electric wire which concerns on a 1st aspect, Comprising: One of the said 1st core wire and the said 2nd core wire is a product made from copper or a copper alloy, and the other is made from aluminum or an aluminum alloy. The first exposed core part and the second exposed core part are ultrasonically welded.

  A third aspect is an assembly of a plurality of electric wires according to the first or second aspect, wherein the first exposed core part includes a bent part and two straight parts connected to the bent part, The first exposed core portion and the second exposed core portion are joined with the two straight portions sandwiching the second exposed core portion.

  A 4th aspect is an aggregate | assembly of the some electric wire which concerns on a 3rd aspect, Comprising: A said 2nd exposed core part includes a bending back part and two linear parts connected to the said bending back part, The 2nd The first exposed core portion and the second exposed core portion are joined in a state where the two straight portions of the exposed core portion sandwich the first exposed core portion.

  A fifth aspect is an assembly of a plurality of electric wires according to the first or second aspect, wherein the first exposed core part is spirally bent around the second exposed core part, The first exposed core part and the second exposed core part are joined.

  A 6th aspect is an aggregate | assembly of the some electric wire which concerns on a 1st or 2nd aspect, Comprising: Plural so that the said 1st exposed core part may include three or more linear parts arrange | positioned in parallel. The second exposed core portion is formed into a shape bent at a plurality of bent portions so as to include three or more straight portions arranged in parallel. The three or more straight portions of the first exposed core portion and the three or more straight portions of the second exposed core portion intersect in a knitted pattern, and three or more straight lines of the first exposed core portion. In a state where at least one of the three or more straight portions of the second exposed core portion is disposed between at least two of the portions, the first exposed core portion and the second exposed core portion are It is what is joined.

  Moreover, in order to solve the said subject, the manufacturing method of the aggregate | assembly of the some electric wire which concerns on a 7th aspect contains the 1st coating | coated part which coat | covers the 1st core wire and the said 1st core wire, A part of the second core wire, including a first electric wire partly exposed as a first exposed core part exposed from the first cover part, a second core wire and a second cover part covering the second core wire Is a method for manufacturing an assembly of a plurality of electric wires connecting the second electric wire that is the second exposed core portion exposed from the second covering portion, and (a) the first exposed core portion is interposed between A step of bending the second exposed core portion to be disposed; and (b) a state in which the second exposed core portion is disposed between the first exposed core portions bent by the step (a). And joining the first exposed core part and the second exposed core part.

  According to the first aspect, the first exposed core wire portion and the second exposed core wire portion are joined in a state where the first exposed core wire portion is bent so as to dispose the second exposed core wire portion therebetween. The joining area | region of a 1st exposed core part and a 2nd exposed core part can be enlarged. Moreover, the operation | work which bends so that a 2nd exposure core line part may be arrange | positioned between a 1st exposure core line part can be performed comparatively easily. Thereby, the joint strength between the first exposed core part and the second exposed core part can be easily improved.

  When the first exposed core part made of copper or copper alloy and the second exposed core part made of aluminum or aluminum alloy are ultrasonically welded, the joint strength between them tends to be weak. In such a case, by ultrasonically welding the first exposed core part and the second exposed core part in a state where the first exposed core part is bent so that the second exposed core part is disposed therebetween. The joining strength between the first exposed core part and the second exposed core part can be easily improved.

  According to the third aspect, the first exposed core portion and the second exposed core portion are bent in a state where the first exposed core portion is bent at the bent portion and the second exposed core portion is sandwiched between the two straight portions. Since joining should just be carried out, the connection work can be performed easily.

  According to the fourth aspect, the first exposed core portion and the second exposed core wire portion are bent in the bent back portion and the first exposed core portion is sandwiched between the two straight portions of the second exposed core portion. Since the exposed core part is joined, the joining strength can be further improved.

  According to the 5th aspect, since the 1st exposed core part is wound around the 2nd exposed core part, those joint strengths can be improved more.

  According to the 6th aspect, since the 1st exposure core wire part and the 2nd exposure core wire part can be joined in a plurality of places in the state where it intersected, those joint strengths can be improved more.

  According to the seventh aspect, the first exposed core wire portion and the second exposed core wire portion are joined in a state where the first exposed core wire portion is bent so as to dispose the second exposed core wire portion therebetween. The joining area | region of a 1st exposed core part and a 2nd exposed core part can be enlarged. Moreover, the operation | work which bends so that a 2nd exposure core line part may be arrange | positioned between a 1st exposure core line part can be performed comparatively easily. Thereby, the joint strength between the first exposed core part and the second exposed core part can be easily improved.

It is a schematic side view which shows the aggregate | assembly of the some electric wire which concerns on embodiment. It is explanatory drawing which shows the manufacturing process of the aggregate | assembly of the some electric wire same as the above. It is explanatory drawing which shows the manufacturing process of the aggregate | assembly of the some electric wire same as the above. It is explanatory drawing which shows the manufacturing process of the aggregate | assembly of the some electric wire same as the above. It is a schematic diagram which shows the state before joining of a 1st exposed core part and a 2nd exposed core part. It is a schematic diagram which shows the state after joining of a 1st exposed core part and a 2nd exposed core part. It is a schematic side view which shows the aggregate | assembly of the some electric wire which concerns on a 1st modification. It is a schematic side view which shows the aggregate | assembly of the some electric wire which concerns on a 2nd modification. It is a schematic side view which shows the aggregate | assembly of the some electric wire which concerns on a 3rd modification. It is the figure which looked at the tip part of the aggregate of a plurality of electric wires concerning the modification same as the above from the tip side. FIG. 10 is a schematic sectional view taken along line XI-XI in FIG. 9.

  Hereinafter, the aggregate | assembly of the some electric wire which concerns on embodiment, and its manufacturing method are demonstrated. FIG. 1 is a schematic side view showing an assembly 10 of a plurality of electric wires.

  The assembly 10 of the plurality of electric wires includes a first electric wire 20 and a second electric wire 30.

  The first electric wire 20 includes a first core wire 22 and a first covering portion 24 that covers the first core wire 22.

  The first core wire 22 is a linear member formed of metal. The first core wire 22 may be constituted by a stranded wire of a plurality of strands 22a, or may be constituted by a single core wire. Here, the first core wire 22 is composed of a plurality of strands 22a. A description will be given of an example in which the wires are formed by twisted wires.

  The first covering portion 24 is a portion formed of an insulating material such as a resin, and is formed by extruding the insulating material around the first core wire 22.

  The 1st coating | coated part 24 is peeled in a part of extension direction of the 1st electric wire 20, and, thereby, the 1st exposure from which a part of extension direction of the 1st core wire 22 is exposed from the 1st coating | coated part 24. The core wire portion 23 is used. Here, the first exposed core portion 23 is formed at the end of the first electric wire 20.

  The second core wire 32 is a linear member formed of metal. The second core wire 32 may be composed of a stranded wire of a plurality of strands 32a, or may be composed of a single core wire. Here, the second core wire 32 is composed of a plurality of strands 32a. A description will be given of an example in which the wires are formed by twisted wires.

  The second covering portion 34 is a portion formed of an insulating material such as a resin, and is formed by extruding the insulating material around the second core wire 32.

  The second covering portion 34 is peeled off in a part in the extending direction of the second electric wire 30, and thereby a second exposure in which a part in the extending direction of the second core wire 32 is exposed from the second covering portion 34. The core wire portion 33 is used. Here, the second exposed core portion 33 is formed at the end of the second electric wire 30.

  In addition, the first exposed core part 23 and the second exposed core part 33 are joined in a state where the first exposed core part 23 is bent so that the second exposed core part 33 is disposed therebetween.

  Here, the first exposed core part 23 is formed longer than the second exposed core part 33. The first exposed core part 23 is bent in a U shape. More specifically, the first exposed core portion 23 includes a bent-back portion 23a bent so as to be turned back, and two straight portions 23b and 23c connected to both ends of the bent-back portion 23a. One straight line portion 23 b is set to have a length similar to that of the second exposed core portion 33, and is continuous with the first core wire 22 in the first covering portion 24. The other straight line portion 23 c is set to have a shorter length than the second exposed core portion 33.

  In a state where the bent-back portion 23a is disposed on the distal end side of the second exposed core portion 33, the two straight portions 23b and 23c are disposed so as to sandwich the second exposed core portion 33 therebetween. The second exposed core portion 33 is disposed along the second exposed core portion 33. In this state, the inward portions of the straight portions 23 b and 23 c are joined to the second exposed core portion 33. For this reason, the 1st exposed core part 23 and the 2nd exposed core part 33 are joined by the two linear joining area | regions which oppose among the outer periphery of the 2nd exposed core part 33. FIG.

  According to the assembly of the plurality of electric wires configured in this manner, the first exposed core portion 23 and the first exposed core portion 23 are bent in a state where the first exposed core portion 23 is bent so as to arrange the second exposed core portion 33 therebetween. Since the 2 exposed core wire part 33 is joined, the joining area | region of the 1st exposed core wire part 23 and the 2nd exposed core wire part 33 can be enlarged. For this reason, the joint strength of the 1st exposed core part 23 and the 2nd exposed core part 33 can be improved.

  Further, the first exposed core part 23 and the second exposed core part 33 are joined by bending the first exposed core part 23 and disposing the second exposed core part 33 between the first exposed core parts 23. Since the area is enlarged, it can be said that it is an easy operation compared to the conventional operation in which a plurality of copper wires of the copper conductor are spread apart to surround the aluminum conductor. For this reason, the joint strength between the first exposed core part 23 and the second exposed core part 33 can be easily improved.

  In particular, in the present embodiment, the first exposed core portion 23 may be bent at the bent portion 23a to form a U shape, and the second exposed core portion 33 may be sandwiched between the two straight portions 23b and 23c. Therefore, the work can be performed more easily.

  A method of manufacturing the plurality of electric wire assemblies 10 will be described.

  First, as shown in FIG. 2, the 1st electric wire 20 and the 2nd electric wire 30 are prepared. As described above, the length dimension of the first exposed core part 23 is larger than the length dimension of the second exposed core part 33.

  Then, the first exposed core portion 23 and the second exposed core portion 33 are arranged in parallel, the first exposed core portion 23 is bent in a U shape, and the bent-back portion 23a is formed as shown in FIG. 2 It arrange | positions at the front end side of the exposed core part 33, and inserts the 2nd exposed core part 33 between the two linear parts 23b and 23c. That is, the first exposed core part 23 is bent, and the second exposed core part 33 is disposed between the first exposed core parts 23. And as shown in FIG. 4, the process target part 40 by which the 2nd exposed core part 33 was inserted | pinched between the two linear parts 23b and 23c is arrange | positioned between the two joining heads 50 and 52 of a joining apparatus. To do. At this time, one linear portion 23b is disposed on the one bonding head 50 side, and the other linear portion 23c is disposed on the other bonding head 52 side.

  And the energy for joining is provided to the process target part 40, pressurizing the process target part 40 with the two joining heads 50 and 52. Then, the pressing force sandwiching the processing target portion 40 is applied to the contact portion between the one straight portion 23b and the second exposed core portion 33, and the contact portion between the other straight portion 23c and the second exposed core portion 33. The contact portions are joined in a state in which they act as strong pressing forces, and the first exposed core portion 23 and the second exposed core portion 33 are joined.

  As the joining method, ultrasonic welding, resistance welding or the like is assumed. When the joining method is ultrasonic welding, one of the two joining heads 50 and 52 is a horn for imparting ultrasonic vibration, and the other is an anvil that receives the processing target portion 40. When the joining method is resistance welding, the two joining heads 50 and 52 are electrodes for flowing current.

  FIG. 5 is a schematic view showing a state before joining the first exposed core part 23 and the second exposed core part 33, and FIG. 6 shows a state after joining the first exposed core part 23 and the second exposed core part 33. It is a schematic diagram which shows a state. As shown in FIG. 5, in the state before joining (however, the state in which pressure is applied by the two joining heads 50 and 52), the strands 32a of the second exposed core portion 33 are spread apart in parallel. The strands 22a of the straight portions 23b and 23c are spread in parallel on the upper and lower sides. Each strand 32a of the second exposed core portion 33 and each strand 22a of each straight portion 23b, 23c may be spread in a single layer state or may be spread in a multilayer state. And if the 1st exposed core part 23 and the 2nd exposed core part 33 are joined, each strand 32a of the 2nd exposed core part 33 will be joined integrally, and each strand of each linear part 23b, 23c 22a is also joined together. At the same time, the second exposed core portion 33 and the straight portions 23b and 23c are joined between different metals.

  Thereby, the aggregate | assembly 10 of the said some electric wire can be manufactured.

  By the way, in recent years, from the viewpoint of vehicle weight reduction and the like, electric wires using aluminum or aluminum alloy core wires (hereinafter simply referred to as copper electric wires) have been popularized. However, electric wires made of copper or copper alloy (hereinafter simply referred to as aluminum electric wires) are still used. For this reason, copper electric wires and aluminum electric wires are used together in the same vehicle. There is a need to connect the wires directly.

  Here, when ultrasonic welding is assumed as the joining method, the joining strength between copper or copper alloy and aluminum or aluminum alloy tends to be weak.

  Therefore, in the above embodiment, one of the first core wire 22 and the second core wire 32 is made of copper or copper alloy, the other is made of aluminum or aluminum alloy, and the first exposed core wire portion 23 and the second exposed core wire portion 33 are If it is set as the structure which ultrasonically welds, it will become possible to connect a copper electric wire and an aluminum electric wire with a strong joining strength simply.

  Aluminum or aluminum alloy has a lower tensile strength than copper or copper alloy. In order to prevent the vibration at the time of ultrasonic welding from acting directly on the aluminum or aluminum alloy core wire and causing damage, the first core wire 22 is made of copper or copper alloy, and the second core wire 32 is It is preferably made of aluminum or aluminum alloy.

  Of course, the above embodiment is a technique for easily and strongly connecting the first exposed core wire portion 23 and the second exposed core wire portion 33 with bonding strength regardless of the material and the bonding method of the first core wire 22 and the second core wire 32. Applicable. The first core wire 22 and the second core wire 32 may be the same type of metal, and the joining method may be resistance welding or the like.

{Modification}
In the above embodiment, the first exposed core portion 23 is bent in a U shape and the second exposed core portion 33 is disposed between the first exposed core portions 23. However, the configuration is limited to such a configuration. Absent.

  For example, the first exposed core portion 123 corresponding to the first exposed core portion 23 is spirally formed around the second exposed core portion 33 as in the assembly 110 of the plurality of electric wires shown in the first modified example of FIG. The first exposed core part 123 and the second exposed core part 33 may be joined in a bent state. In this case, it is not necessary that the first exposed core part 123 and the second exposed core part 33 are joined to the entire periphery of the second exposed core part 33. The first exposed core part 123 and the second exposed core part 33 may be joined from two directions sandwiching them, or may be joined from three or more directions around them.

  According to this modification, since the first exposed core portion 123 is wound around the second exposed core portion 33, the bonding strength thereof can be further improved.

  Further, for example, in the assembly 210 of the plurality of electric wires shown in the second modified example of FIG. 8, the first exposed core portion 223 corresponding to the first exposed core portion 23 is provided with three or more arranged in parallel. It is formed in a shape bent by a plurality of bent-back portions 223a so as to include the straight portion 223b. Here, the first exposed core portion 223 is bent into a U shape by three bent portions 223a to form four straight portions 223b arranged in parallel. Further, the second exposed core portion 233 corresponding to the second exposed core portion 33 is formed in a shape bent by a plurality of bent portions 233a so as to include three or more straight portions 233b arranged in parallel. doing. Here, the second exposed core portion 233 is bent into a U shape by three bent portions 233a to form four straight portions 233b arranged in parallel.

  Then, the four straight portions 223b of the first exposed core portion 223 and the four straight portions 233b of the second exposed core portion 233 intersect with each other in a knitted pattern, and among the straight portions 223b of the first exposed core portion 223, The first exposed core portion 223 and the second exposed core portion 233 are joined together with at least one of the straight portions 233b of the second exposed core portion 233 being disposed between at least two. Here, the straight portions 223b of the first exposed core portion 223 are alternately arranged above and below the parallel body of the straight portions 233b of the second exposed core portion 233 in the direction in which the straight portions 223 are arranged. In other words, the parallel body of the straight portions 233b of the second exposed core portion 233 is disposed between the adjacent portions of the straight portions 223b of the first exposed core portion 223. Thereby, the plurality of straight portions 223b and the plurality of straight portions 233b are arranged in a stitch shape, and the plurality of straight portions 223b and the plurality of straight portions 233b are ultrasonically welded at the intersections as in the above embodiment. Are joined by.

  According to this example, since the first exposed core part 223 and the second exposed core part 233 can be joined at a plurality of locations in a crossed state, the joining strength can be further improved.

  In the assembly 310 of the some electric wire which concerns on the 3rd modification shown in FIGS. 9-11, on the assumption of the said embodiment, the 2nd exposure core wire part 333 corresponding to the 2nd exposure core wire part 33 is the bending part 333a. And two straight portions 333b and 333c connected to the bent-back portion 333a. The bent-back portion 333a is a direction connecting the straight portions 333b and 333c when viewed along the extending direction of the straight portion 333b so that the straight portion 23b of the first exposed core portion 23 can be bypassed laterally. It curves so as to be outwardly convex in a direction orthogonal to the direction (see FIG. 10).

  Of the two straight portions 333 b and 333 c of the second exposed core portion 333, the straight portion 333 b on the proximal end side is sandwiched between the two straight portions 23 b and 23 c of the first exposed core portion 23. Further, of the two straight portions 333 b and 333 c of the second exposed core portion 333, the straight portion 333 c on the distal end side is opposite to the straight portion 23 b on the proximal end side of the first exposed core portion 23, opposite to the straight portion 23 c on the distal end side. The two straight portions 333 b and 333 c of the second exposed core portion 333 sandwich the straight portion 23 b on the proximal end side of the first exposed core portion 23. In this state, the first exposed core part 23 and the second exposed core part 333 are joined.

  According to this example, the first exposed core part 23 and the second exposed core part 333 are joined at three linear regions. For this reason, those joint strengths can be improved more.

  In the said embodiment and each modification, although demonstrated in the example which joins the exposed core part of two electric wires, many exposed core parts of an electric wire may be joined. For example, the first exposed core portions 23, 123, and 223 may be bent in a state where the exposed core portions of other electric wires are bundled, and may be joined to the second exposed core portions 33, 233, and 333. The first exposed core portions 23, 123, and 223 may be joined to the second exposed core portions 33, 233, and 333 that are bundled with the exposed core portions of other electric wires.

  Moreover, although the said embodiment and each modification demonstrated by the example which joins the exposed core wire parts exposed to the edge part of two electric wires, one or the other exposed core wire part is exposed in the extension direction intermediate part of an electric wire. You may do.

  In addition, each structure demonstrated by each said embodiment and each modification can be suitably combined unless it mutually contradicts.

  As described above, the present invention has been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

10, 110, 210, 310 Aggregate 20 First electric wire 22 First core wire 23, 123, 223 First exposed core wire portion 23a, 223a Bending portion 23b, 23c, 223b Straight portion 24 First covering portion 30 Second electric wire 32 Second core wire 33, 233, 333 Second exposed core portion 34 Second covering portion 233a, 333a Bending portion 233b, 333b, 333c Straight portion

Claims (7)

A first electric wire including a first core wire and a first covering portion that covers the first core wire, wherein a part of the first core wire is a first exposed core wire portion that is exposed from the first covering portion;
A second electric wire including a second core wire and a second covering portion that covers the second core wire, wherein the second core wire is a second exposed core portion that is exposed from the second covering portion;
With
A plurality of electric wires in which the first exposed core wire portion and the second exposed core wire portion are joined in a state where the first exposed core wire portion is bent so that the second exposed core wire portion is disposed therebetween. Aggregation of An assembly of a plurality of electric wires according to claim 1,
One of the first core wire and the second core wire is made of copper or copper alloy, and the other is made of aluminum or aluminum alloy,
An assembly of a plurality of electric wires, wherein the first exposed core wire portion and the second exposed core wire portion are ultrasonically welded. An assembly of a plurality of electric wires according to claim 1 or claim 2,
The first exposed core portion includes a bent portion and two straight portions connected to the bent portion, and the two exposed portions sandwich the second exposed core portion. The aggregate | assembly of the some electric wire with which the said 2nd exposure core wire part is joined. An assembly of a plurality of electric wires according to claim 3,
The second exposed core portion includes a bent portion and two straight portions connected to the bent portion, and the two straight portions of the second exposed core portion sandwich the first exposed core portion, The aggregate | assembly of the some electric wire with which the said 1st exposure core wire part and the said 2nd exposure core wire part are joined. An assembly of a plurality of electric wires according to claim 1 or claim 2,
An assembly of a plurality of electric wires in which the first exposed core part and the second exposed core part are joined in a state where the first exposed core part is spirally bent around the second exposed core part. . An assembly of a plurality of electric wires according to claim 1 or claim 2,
The first exposed core portion is formed into a shape bent at a plurality of bent portions so as to include three or more straight portions arranged in parallel,
The second exposed core portion is formed into a shape bent at a plurality of bent portions so as to include three or more straight portions arranged in parallel,
Three or more straight portions of the first exposed core portion intersect with three or more straight portions of the second exposed core portion in a stitch shape, and three or more straight portions of the first exposed core portion. The first exposed core portion and the second exposed core portion are joined in a state where at least one of the three or more straight portions of the second exposed core portion is disposed between at least two of the first exposed core portion. An assembly of multiple wires. A first electric wire including a first core wire and a first covering portion covering the first core wire, wherein a first exposed core wire portion in which a part of the first core wire is exposed from the first covering portion; A plurality of core wires and a second covering portion covering the second core wire, wherein a plurality of the second core wires are connected to a second electric wire that is a second exposed core portion exposed from the second covering portion. A method of manufacturing an assembly of electric wires,
(a) bending the first exposed core part so as to dispose the second exposed core part therebetween;
(b) In a state where the second exposed core part is disposed between the first exposed core parts bent in the step (a), the first exposed core part and the second exposed core part are Joining, and
The manufacturing method of the aggregate | assembly of the some electric wire provided with.

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