JP2014146506A - Wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire harness having a branch structure, that achieves electromagnetic shielding function easily and inexpensively without wasting the material and production process.SOLUTION: A main wire group 1 comprising insulated wires 10a, 10b, has a main wire part 1a along a string of a line L0, and a branched wire part 1b branched from the main wire part 1a at an intermediate position between endpoints of the main wire part 1a. A metallic foil 4a is wound around a bundle of a drain wire 2a and the main wire part 1a to cover a periphery of the bundle. In addition, the metallic foil 4a is wound in a state in contact with drain wire 2a as well as in a state in which first edge part 41 and second edge part 42 on the opposite side of the first edge part are along the extension direction of the drain wire 2a. A secondary coating 5a is composed of a tape of a non-conductive material wound around the metallic foil 4a, and covers the metallic foil 4a.

Description

  The present invention relates to a wire harness having an electromagnetic shielding function.

  In a conventional wire harness, when an electromagnetic shielding function for shielding electromagnetic waves is required, a shielded electric wire is used. Moreover, when the edge part of a shielded electric wire and the reference | standard electric potential point of housing | casing grounding are separated, the shielded electric wire with a drain wire as shown in patent document 1 is used.

  The shielded electric wire with a drain wire includes a core electric wire having a primary coating, a drain wire without a coating, a metal foil covering the core electric wire and the drain wire, and a secondary coating covering the metal foil. The core wire is an insulated wire. The secondary coating is a synthetic resin member formed into a tubular shape that bundles and covers the core electric wires and the drain wires. The secondary coating is formed by extrusion. The metal foil is formed along the inner surface of the secondary coating and is in contact with the drain line.

  Further, the drain line extending from the end of the secondary coating is connected to the reference potential point. Thereby, the metal foil is electrically connected to the reference potential point via the drain line.

  Insulated wires may be referred to as covered wires. The insulated wire has a linear conductor and an insulating coating (primary coating) covering the periphery of the conductor.

  On the other hand, the shielded wire shown in Patent Document 2 includes a shield tape having a three-layer structure wound spirally around the core wire and the drain wire. A shield tape having a three-layer structure has an intermediate layer made of a tape-like insulator and conductor layers formed on both sides of the intermediate layer.

Japanese Utility Model Publication No. 6-31029 JP 2002-140938 A

  Conventionally, in a wire harness that requires an electromagnetic shielding function, a branch portion of an insulated wire (core wire) may be provided.

  For example, in a wire harness, a portion where a plurality of insulated wires are electrically connected may be a branch portion. In this case, a structure is employed in which the ends of the insulated wires (core wires) in each of the plurality of shielded wires are connected by a branch joint connector. For example, the ends of insulated wires (core wires) in each of the three shielded wires are connected by a joint connector. In such a wire harness, the joint connector portion is a branching portion.

  On the other hand, in the wire harness, some of the bundled insulated wires may branch off from the other part. In this case, for example, a structure in which the secondary coating of the shielded wire including a plurality of insulated wires (core wires) is peeled in the range from one end of the shielded wire to the branching portion is employed. Furthermore, in this case, it is necessary to add an electromagnetic shield structure to each of the plurality of insulated wires (core wires) exposed from the secondary coating.

  However, the joint connector has a large volume and high cost. Therefore, when a joint connector is employed, the branch portion of the wire harness becomes excessively thick and the cost increases.

  Moreover, after the secondary covering of the shielded electric wire is once peeled in a long range, the addition of individual shield structures for each of the plurality of insulated electric wires exposed from the secondary covering is wasteful in materials and manufacturing processes.

  In addition, the shielded electric wire shown in Patent Document 2 requires a step of forming a secondary coating on the outer periphery of the shield tape in addition to the step of winding a three-layer shield tape around the electric wire for the production thereof. The step of forming the secondary coating is, for example, a step of winding an insulating tape in a spiral shape or a step of extruding a synthetic resin.

  To form the shield layer and the secondary coating, it is very complicated to repeat the process of winding the tape in a spiral shape twice. In addition, the extrusion of the synthetic resin for forming the secondary coating requires more troublesome work and a large-scale molding apparatus.

  An object of the present invention is to realize an electromagnetic shielding function easily and at low cost without waste of materials and manufacturing processes in a wire harness having a branched structure.

The wire harness which concerns on the 1st aspect of this invention is equipped with each component shown below.
(1) The first component is a main electric wire group. This main electric wire group has a main line portion including an insulated wire along a series of lines and a branch line portion including an insulated wire branched from the main line portion at an intermediate position between both end portions of the main line portion.
(2) A 2nd component is the 1st drain line which consists of a conducting wire along the said main line part of the said main electric wire group.
(3) The third component is a first metal foil. The first metal foil is wound around the bundle of the main line portion of the first drain wire and the main electric wire group to cover the periphery of the bundle. Further, the first metal foil is wound in a state in contact with the first drain wire, and in a state in which the first edge and the second edge opposite to the first edge are along the extending direction of the first drain wire. ing.
(4) A fourth component is a main secondary coating that is made of a tape of a nonconductive material wound around the first metal foil and covers the first metal foil.

  The wire harness according to the second aspect of the present invention is one aspect of the wire harness according to the first aspect. The wire harness which concerns on a 2nd aspect WHEREIN: The said main line secondary coating | cover is the adhesive tape wound around the said 1st metal foil.

The wire harness according to the third aspect of the present invention is one aspect of the wire harness according to the first aspect or the second aspect. The wire harness which concerns on a 3rd aspect is further provided with the component shown below.
(5) A 5th component is the 2nd drain line which consists of a conducting wire along the said branch line part of the said main electric wire group.
(6) The sixth component is a second metal foil. The second metal foil is wound around a bundle of the second drain wire and the branch line portion of the main electric wire group to cover the periphery of the bundle. Further, the second metal foil is wound in a state where it is in contact with the second drain line, and in a state where the first edge and the second edge on the opposite side are along the extending direction of the second drain line. ing.
(7) The seventh component is a branch secondary coating that is made of a tape of a non-conductive material wound around the second metal foil and covers the second metal foil.

  The wire harness which concerns on the 4th aspect of this invention is one aspect | mode of the wire harness which concerns on a 3rd aspect. The wire harness which concerns on a 4th aspect WHEREIN: The said branch line secondary coating | cover is the adhesive tape wound around the said 2nd metal foil.

  The wire harness according to the fifth aspect of the present invention is an aspect of the wire harness according to any one of the first to fourth aspects. The wire harness which concerns on a 5th aspect WHEREIN: The said branch line part of the said main electric wire group contains the 2nd insulated wire joined to the 1st insulated wire which comprises the said main line part.

  The wire harness which concerns on the 6th aspect of this invention is one aspect | mode of the wire harness which concerns on a 1st aspect or a 2nd aspect. The wire harness which concerns on a 6th aspect is further equipped with the branch drain line which consists of a conducting wire electrically connected with the said 1st drain line. The branch drain line is branched from the first drain line at an intermediate position between both ends of the first drain line. Further, the branch drain line extends from the first metal foil and the main line secondary coating.

  A wire harness according to a seventh aspect of the present invention is an aspect of a wire harness according to any one of the first to fourth aspects. The wire harness according to the seventh aspect further includes a ground wire made of an insulated wire. The ground wire has a joint portion that is a portion where the conductor exposed from the coating of the ground wire (insulated wire) and a part of the first drain wire are electrically connected. In this case, the metal foil is wound by bundling the first drain wire, the main wire portion of the main electric wire group, and a region including the joining portion other than at least one end portion of the ground wire.

  The wire harness which concerns on each said aspect is equipped with the metal foil which covers the circumference | surroundings of an insulated wire, and the drain wire for connecting a metal foil to a reference potential point. Therefore, the wire harness which concerns on each said aspect has an electromagnetic shielding function at least in the main line part of the main electric wire group.

  Furthermore, according to the wire harness which concerns on said each aspect, an electromagnetic shielding function is realizable by the simple process shown below. First, a main electric wire group that has been subjected to a terminal process and a process for forming a branch portion in advance, and a drain line (first drain line) that has been subjected to a terminal process in advance are prepared. Here, the process of performing terminal treatments such as removal of the covering (primary covering) and crimping of the crimp terminal on each insulated wire can be easily automated by a conventional wire processing apparatus. Furthermore, the process of forming the branch portion in the main electric wire group is also a simple process that is usually performed in the manufacturing process of the wire harness. Moreover, the process of performing terminal processing such as crimping of a ground terminal on the drain wire can be easily automated by a conventional wire processing apparatus.

  Next, a process of winding a tape-like secondary coating around the outer periphery of the metal foil while wrapping a bundle of drain wires (first drain wires) and the main wire group of the main electric wire group with the metal foil is performed. As will be described later, such a process can be easily performed. Therefore, according to the wire harness which concerns on said each aspect, an electromagnetic shielding function is easily realizable.

  Furthermore, the waste of the material and the manufacturing process that occurs when a shielded electric wire with a secondary coating formed in advance is not used in each of the above aspects. That is, there is no waste that the secondary coating of the shielded wire that has been formed in advance is once peeled off, and then another secondary coating is formed again around the insulated wire.

  Further, as in the case of the wire harness according to the fifth aspect, even if the branch line portion of the main wire group is another insulated wire joined to the insulated wire of the main wire portion, an expensive and large joint connector is unnecessary. is there. Therefore, a relatively thin wire harness can be provided at low cost.

  Moreover, the secondary coating | cover of the wire harness which concerns on a 2nd aspect and a 4th aspect is the adhesive tape wound around metal foil. In this case, the secondary coating is formed by wrapping an adhesive tape around the outer periphery of the metal foil while wrapping a part of the main electric wire group and a bundle of drain wires with the metal foil. As will be described later, such a process can be easily automated.

  Moreover, the wire harness which concerns on a 3rd aspect is suitable when an electromagnetic shielding function is required in both the main line part and branch line part in a main electric wire group.

  The wire harness according to the sixth aspect includes a branched drain line branched from the first drain line at an intermediate position of the first drain line. The use of such a wire harness is suitable when the reference potential point exists in the vicinity of the intermediate position of the first drain line.

  Moreover, the wire harness which concerns on a 7th aspect is equipped with the earth wire which consists of an insulated wire electrically connected with the 1st drain wire. In this case, the ground wire is not short-circuited to a surrounding conductor that is not the reference potential point in a portion other than the end portion. The use of such a wire harness is suitable when the end portion of the secondary coating is separated from the reference potential point.

1 is a perspective view of a wire harness 10 according to a first embodiment of the present invention. 2 is a plan view of the wire harness 10. FIG. 2 is an exploded plan view of the wire harness 10. FIG. 2 is a schematic view of a manufacturing process of the wire harness 10. FIG. It is an exploded top view of wire harness 10X concerning a 2nd embodiment of the present invention. It is a perspective view of the edge part of the wire harness which has the secondary coating | cover 5X which concerns on the application example applicable to the wire harnesses 10 and 10X. It is an exploded top view of wire harness 10Y concerning a 2nd embodiment of the present invention. It is an exploded top view of wire harness 10Z concerning a 3rd embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The following embodiment is an example embodying the present invention, and is not an example of limiting the technical scope of the present invention. The wire harness according to each embodiment shown below has an electromagnetic shielding function for shielding noise electromagnetic waves around the electric wire, and is mainly mounted on a vehicle such as an automobile.

<First Embodiment>
First, the configuration of the wire harness 10 according to the first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a wire harness 10 includes a main electric wire group 1 including a plurality of insulated wires 10a and 10b, at least one first drain wire 2a, at least one second drain wire 2b, and a first metal. A foil 4a, a second metal foil 4b, a main line secondary coating 5a, and a branch line secondary coating 5b are provided.

<Main wire group>
The main electric wire group 1 has a main line portion 1a and a branch line portion 1b branched from the main line portion 1a. That is, the main electric wire group 1 has a branch portion 3. The main line portion 1a includes a first insulated wire 10a along a series of lines L0. The branch line portion 1b includes a second insulated wire 10b branched from the main line portion 1a at an intermediate position between both ends of the main line portion 1a.

  The plurality of insulated wires 10a and 10b constituting the main wire group 1 are wires that are connected to electrical equipment and transmit power or signals. Each of the insulated wires 10 a and 10 b is a covered wire having a linear conductor 11 and an insulating coating 12 that covers the periphery of the conductor 11. Normally, the conductor 11 is a stranded wire in which a plurality of thin strands are twisted together, but it is also conceivable that the conductor 11 is a single wire.

  In the example shown in FIGS. 1 to 3, the main line portion 1a includes two first insulated wires 10a, and the branch line portion 1b includes two second insulated wires 10b. Each of the second insulated wires 10b of the branch line portion 1b is joined to each of the first insulated wires 10a constituting the main wire portion 1a.

  More specifically, the conductor 11 at the end of the second insulated wire 10b constituting the branch line portion 1b is joined to the conductor 11 at the intermediate position of the first insulated wire 10a constituting the main wire portion 1a. Therefore, the junction part 100 which is the part by which the 1st insulated wire 10a and the 2nd insulated wire 10b were electrically joined is formed in the branch part 3 in the main electric wire group 1. FIG.

  The two conductors 11 are joined, for example, by crimping a caulking fitting that is a tubular metal member. Alternatively, the two conductors 11 may be joined by welding.

  In this embodiment, the 1st insulated wire 10a and the 2nd insulated wire 10b which comprise the main wire group 1 are electric wires with a terminal in which the crimp terminal 13 was provided in the edge part. The ends of the insulated wires 10a and 10b to which the crimp terminals 13 are attached are in a state in which the insulation coating 12 is peeled off from the periphery of the conductor 11 of a certain length, that is, the conductor 11 of a certain length is insulated. 12 is processed to extend from the end of 12.

  The crimp terminals 13 of the insulated wires 10a and 10b are loaded into a connector cavity (not shown). The insulated wires 10a and 10b are connected to the electrical equipment through the connectors. The main electric wire group 1 includes at least two insulated wires. In the example shown in FIGS. 1 to 3, the main electric wire group 1 includes two first insulated wires 10a constituting the main wire portion 1a and two second insulated wires 10b constituting the branch wire portion 1b.

<Drain line>
The wire harness 10 has a first drain line 2a and a second drain line 2b each made of a conducting wire. The first drain line 2a and the second drain line 2b are linear conductors with no coating, that is, bare conductors. Usually, the drain wires 2a and 2b are stranded wires in which a plurality of thin strands are twisted together, but the drain wires 2a and 2b may be single wires.

  The first drain wire 2 a is a conducting wire along the main wire portion 1 a of the main electric wire group 1. The first drain wire 2a is in contact with the first metal foil 4a. On the other hand, the second drain wire 2 b is a conducting wire along the branch line portion 1 b of the main electric wire group 1. The second drain wire 2b is in contact with the second metal foil 4b.

  In the example shown in FIG. 3, the first drain line 2a and the second drain line 2b are not connected but are formed independently.

  In addition, a ground terminal 23 is connected to each end of the first drain line 2a and the second drain line 2b. The ground terminal 23 is a metal terminal connected to a reference potential point (not shown). In a vehicle, the reference potential point is, for example, a metal frame of a vehicle body.

  It is also conceivable that the first drain line 2a and the second drain line 2b are joined. In this case, one end of the second drain line 2b is joined to an intermediate position of the first drain line 2a. The two drain wires 2a and 2b are joined by, for example, crimping a caulking fitting that is a tubular metal member. Alternatively, the two drain wires 2a and 2b may be joined by welding.

  Moreover, it is also conceivable that the entire first drain line 2a and the second drain line 2b are constituted by a single conductor that is folded in the vicinity of the end of the branch line portion 1b. In this case, the second drain wire 2b is a bundle of conducting wires arranged in two rows by being folded.

<Metal foil>
The wire harness 10 includes a first metal foil 4a that covers the main line portion 1a and the first drain wire 2a, and a second metal foil 4b that covers the branch line portion 1b and the second drain wire 2b. The first metal foil 4a and the second metal foil 4b are foil-shaped members made of a metal such as aluminum or copper.

  The first metal foil 4a is wound around a bundle of the main line portion 1a and the first drain wire 2a and covers the periphery of the bundle. More specifically, the first metal foil 4a is a part from the intermediate region between both ends of the main wire portion 1a of the main electric wire group 1 and at least the end of the first drain wire 2a provided with the ground terminal 23. It is wound in a state of covering the remaining area excluding the area.

  Further, the first metal foil 4a is wound in contact with the first drain wire 2a. And the 1st metal foil 4a is wound in the state where the 1st edge part 41 and the 2nd edge part 42 of the other side of the four edge parts follow the extending | stretching direction of the 1st drain wire 2a. . In addition, the extending | stretching direction of the 1st drain wire 2a is also the extending | stretching direction (axial center direction) of the main wire part 1a in the main electric wire group 1.

  In other words, the first metal foil 4a is the main line portion in the state in which the first edge portion 41 and the second edge portion 42 forming the long side in the rectangular first metal foil 4a are along the extending direction of the first drain wire 2a. 1a and the first drain wire 2a are wound around a bundle. Therefore, the first metal foil 4a is not wound spirally. The first metal foil 4a is preferably wound in a tubular shape with the first edge 41 overlapping the other part and the second edge 42 overlapping the other part.

  Similarly, the second metal foil 4b is wound around a bundle of the branch line portion 1b and the second drain wire 2b and covers the periphery of the bundle. More specifically, the second metal foil 4b is formed from the remaining region excluding the end portion of the branch line portion 1b of the main electric wire group 1 and from the end of the second drain wire 2b where at least the ground terminal 23 is provided. It is wound so as to cover the remaining area excluding the area of the part.

  Furthermore, the 2nd metal foil 4b is wound in the state which contact | connects the 2nd drain wire 2b. And the 2nd metal foil 4b is wound in the state where the 1st edge part 41 and the 2nd edge part 42 of the other side of the four edge parts follow the extending | stretching direction of the 2nd drain wire 2b. . The extending direction of the second drain wire 2b is also the extending direction (axial direction) of the branch line portion 1b in the main electric wire group 1.

  In other words, in the state where the first edge 41 and the second edge 42 forming the long side in the rectangular second metal foil 4b are along the extending direction of the second drain wire 2b, the second metal foil 4b is the branch line portion. It is wound around a bundle of 1b and second drain wire 2b. Therefore, the second metal foil 4b is not wound spirally. The second metal foil 4b is preferably wound in a tubular shape with the first edge 41 overlapping the other part and the second edge 42 overlapping the other part.

<Secondary coating>
In this embodiment, the insulation coating 12 of the first insulated wire 10a in the main line portion 1a is a primary coating formed inside the main line secondary coating 5a. Similarly, the insulation coating 12 of the second insulated wire 10b in the branch line portion 1b is a primary coating formed inside the branch line secondary coating 5b.

  For example, the main line secondary coating 5a and the branch line secondary coating 5b are flexible members made of a synthetic resin such as polyvinyl chloride (PVC) or polyethylene (PE).

  The main wire secondary coating 5a is a member that covers the first metal foil 4a wound around the bundle of the main wire portion 1a and the first drain wire 2a. The main wire secondary coating 5a is made of a non-conductive tape wound around the first metal foil 4a. On the other hand, the branch secondary coating 5b is a member that covers the second metal foil 4b wound around the bundle of the branch line portion 1b and the second drain wire 2b. The branch secondary coating 5b is made of a nonconductive material tape wound around the second metal foil 4b.

  The main line secondary coating 5a in the present embodiment is an adhesive tape 50 wound around the first metal foil 4a. Similarly, the branch line secondary coating 5b is also an adhesive tape 50 wound around the second metal foil 4b.

  The adhesive tape 50 has a flexible tape-like base material and an adhesive layer formed on the surface of the base material. Moreover, the part which covers the area | regions other than the branch part 3 of the main electric wire group 1 in the main line secondary coating | cover 5a and the branch line secondary coating | cover 5b is helical with respect to the bundle | flux of the insulated wires 10a and 10 and the drain wires 2a and 2b. It is the adhesive tape 50 wound.

  It is also conceivable that one or both of the main line secondary coating 5a and the branch line secondary coating 5b is a member obtained by curing a synthetic resin tape. For example, the main wire secondary coating 5a may be a member that is cured after a tape of a synthetic resin such as an ultraviolet curable resin, a thermosetting resin, or a moisture curable resin is wound around the first metal foil 4a. In this case, the main line secondary coating 5a is also a protector that protects the main line part 1a and holds the main line part 1a in a predetermined shape.

  It is also conceivable that the wire harness 10 further includes a plurality of binding materials that bind a plurality of locations of the first drain wire 2a to the main wire portion 1a. In this case, the first metal foil 4a is wound around the bundle of the main wire portion 1a and the first drain wire 2a from the outside of the plurality of binding materials. The binding material is, for example, an adhesive tape.

<Method for manufacturing wire harness>
Next, an example of a method for manufacturing the wire harness 10 will be described with reference to FIG. FIG. 4 is a schematic view of the manufacturing process of the wire harness 10.

  The wire harness 10 can be easily manufactured by a generally automated process. First, the main electric wire group 1, the first drain wire 2a, and the second drain wire 2b that have been subjected to terminal processing in advance are prepared.

  The process of performing terminal processing such as removal of the insulation coating 12 and crimping of the crimp terminal 13 on each insulated wire 10a, 10b can be easily automated by a conventional wire processing apparatus. Similarly, the process of attaching the ground terminal 23 to the drain wires 2a and 2b can be easily automated by a conventional wire processing apparatus.

  Next, the surrounding process which forms metal foil 4a, 4b and secondary coating | cover 5a, 5b is performed. The go process includes a main line go process and a branch line go process. Either the main line enclosing process is performed before the branch line enclosing process or the branch line enclosing process is performed before the main line enclosing process.

  The surrounding process of the main line part is a process of wrapping the bundle of the main line part 1a and the first drain line 2a with the first metal foil 4a and winding the tape-shaped main line secondary coating 5a around the outer periphery of the first metal foil 4a. . The surrounding process of the branch line part is a process of wrapping the bundle of the branch line part 1b and the second drain wire 2b with the second metal foil 4b and winding the tape-like branch line secondary coating 5b around the outer periphery of the second metal foil 4b. .

  In the surrounding process, for example, an automatic tape winding device 9 and a guide jig 8 are used. In the following description, each of the bundle of the main line portion 1a and the first drain wire 2a and the bundle of the branch line portion 1b and the second drain wire 2b is referred to as an electric wire bundle.

  The automatic tape winding device 9 includes a pair of transport rollers 91 and a tape winding mechanism 92. The pair of transport rollers 91 transport the wire bundle along the extending direction by sandwiching and rotating the wire bundle. The tape winding mechanism 92 rotates the feeding portion of the adhesive tape 50 around the wire bundle being conveyed while feeding the adhesive tape 50.

  The guide jig 8 is disposed upstream of the automatic tape winding device 9 in the direction in which the electric wire bundle is conveyed. Moreover, one end of the metal foils 4a and 4b is fixed to the wire bundle in advance. Then, the guide jig 8 deforms the metal foils 4a and 4b that move together with the wire bundle in order from the end side fixed to the wire bundle into a ring shape that wraps around the wire bundle being conveyed.

  And the tape winding mechanism 92 winds the adhesive tape 50 around the outer periphery of the metal foils 4a and 4b deformed so as to wrap the electric wire bundle. As a result, the adhesive tape 50 is spirally wound around the metal foils 4a and 4b deformed into a tubular shape surrounding the wire bundle, and the secondary coatings 5a and 5b are formed.

  As described above, the step of winding the metal foils 4a and 4b and the secondary coatings 5a and 5b uses the guide jig 8 and the automatic tape winding device 9 in the region from the end to the branching portion 3 in the wire bundle. It can be easily automated.

  Moreover, the process of winding the adhesive tape 50 around the 1st metal foil 4a, wrapping the part of the branch part 3 in an electric wire bundle with the 1st metal foil 4a is performed by manual operation.

<Effect>
The wire harness 10 includes metal foils 4a and 4b covering the periphery of the insulated wires 10a and 10b, and drain wires 2a and 2b for connecting the metal foils 4a and 4b to a reference potential point. Therefore, the wire harness 10 has an electromagnetic shielding function in the main line portion 1 a and the branch line portion 1 b of the main electric wire group 1.

  Furthermore, according to the wire harness 10, an electromagnetic shielding function can be realized by a simple surrounding process as shown in FIG.

  Further, the waste of the material and the manufacturing process that occurs when a shielded electric wire with a secondary coating formed in advance is not used in the wire harness 10. That is, there is no waste that the secondary coating of the shielded wire that has been formed in advance is once peeled off, and then another secondary coating is formed again around the insulated wire.

  Moreover, in the wire harness 10, the branch line part 1b of the main electric wire group 1 is the 2nd insulated wire 10b joined to the 1st insulated wire 10a of the main wire part 1a. Even in such a case, an expensive and large joint connector is unnecessary. Therefore, the relatively thin wire harness 10 can be provided at low cost.

  Moreover, the secondary coating | covers 5a and 5b of the wire harness 10 are the adhesive tapes 50 wound around the metal foils 4a and 4b. In this case, the process of winding the adhesive tape 50 for forming the secondary coatings 5 a and 5 b can be easily automated using the automatic tape winding device 9.

  Moreover, the wire harness 10 is suitable when an electromagnetic shielding function is required in both the main line portion 1a and the branch line portion 1b in the main electric wire group 1.

Second Embodiment
Next, a wire harness 10X according to a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is an exploded plan view of the wire harness 10X.

  The wire harness 10X differs from the wire harness 10 shown in FIGS. In FIG. 5, the same components as those shown in FIGS. 1 to 3 are given the same reference numerals. Hereinafter, only the points of the wire harness 10X that are different from the wire harness 10 will be described.

  Similarly to the wire harness 10, the wire harness 10X includes a main wire group 1X including a plurality of insulated wires, at least one first drain wire 2a, at least one second drain wire 2b, a first metal foil 4a, A bimetallic foil 4b, a main line secondary coating 5a, and a branch line secondary coating 5b are provided.

  The main electric wire group 1X includes a main line portion 1a and a branch line portion 1b branched from the main line portion 1a. That is, the main electric wire group 1 </ b> X has a branch portion 3. The main wire portion 1a of the main wire group 1X includes a plurality of first insulated wires 10a along a series of lines L0. However, some of the plurality of first insulated wires 10a include a portion that forms the main line portion 1a and a portion that forms the branch line portion 1b branched from the main line portion 1a.

  That is, the branch line portion 1b of the main wire group 1X is a part of the plurality of first insulated wires 10a, and the first insulated wire 10a branched from the main wire portion 1a at an intermediate position between both ends of the main wire portion 1a. including. In this case, the joining part 100 is not formed between the part which forms the main line part 1a in the 1st insulated wire 10a, and the part which forms the branch line part 1b.

  When the wire harness 10X is employed, the same effects as when the wire harness 10 is employed are obtained.

<Application example of secondary coating>
Next, the secondary coating 5X according to an application example applicable to the wire harnesses 10 and 10X will be described with reference to FIG. FIG. 6 is a perspective view of the end portion of the wire harness having the secondary coating 5X.

  Hereinafter, the case where the secondary coating 5X is employed as the main secondary coating 5a will be described. However, the secondary coating 5X may be employed as the branch secondary coating 5b.

  The secondary coating 5X is made of a non-conductive material tape wound around the first metal foil 4a. However, the secondary coating 5X is a tape-like laminate film wound around the first metal foil 4a.

  More specifically, the laminate film constituting the secondary coating 5X is wound around a bundle of the main wire portion 1a and the first drain wire 2a of the main electric wire group 1 and covers the periphery of the bundle. Furthermore, the laminate film constituting the secondary coating 5X is wound in a state where the first edge 51 and the second edge 52 on the opposite side of the four edges are along the extending direction of the first drain wire 2a. It is. Further, the first edge 51 and the second edge 52 of the laminate film (secondary coating 5X) are bonded by an adhesive layer formed on the surface of the film.

  In the manufacturing process of the wire harness 10X, the tape-like metal foils 4a and 4b and the tape-like laminate film are deformed into a cylindrical shape covering the electric wire bundle by a jig similar to the guide jig 8 shown in FIG.

  Further, the first edge 51 and the second edge 52 of the laminated film deformed into a cylindrical shape are heated while being pressed against each other by a pair of heating rollers or the like. The deformation and heating steps described above are performed in the region from the end side in the wire bundle to the position of the branch portion 3. Thereby, the 1st edge part 51 and the 2nd edge part 52 of a laminate film are adhere | attached, and the laminate film is shape | molded by the secondary coating | cover 5X which covers the intermediate | middle area | region of an electric wire bundle.

  Therefore, in the wire harnesses 10 and 10X, when the secondary coating 5X is employed, the same effect as that obtained when the secondary coatings 5A and 5B are employed is obtained.

<Third Embodiment>
Next, a wire harness 10Y according to a third embodiment of the present invention will be described with reference to FIG. FIG. 7 is an exploded plan view of the wire harness 10Y.

  Compared with the wire harness 10 shown in FIGS. 1 to 3, the wire harness 10Y does not include the second metal foil 4a and the branch line secondary coating 5b and includes the branch drain line 2c. Is different. 7, the same components as those shown in FIGS. 1 to 5 are given the same reference numerals. Hereinafter, only the differences from the wire harness 10 in the wire harness 10Y will be described.

  Similarly to the wire harness 10, the wire harness 10Y also includes a main wire group 1X including a plurality of insulated wires, at least one first drain wire 2a, a first metal foil 4a, a main wire secondary coating 5a, and a branch wire secondary coating 5b. Is provided. Further, the main electric wire group 1X includes a main line portion 1a and a branch line portion 1b branched from the main line portion 1a. However, the wire harness 10Y does not include the second metal foil 4a and the branch line secondary coating 5b.

  The wire harness 10Y includes a branch drain line 2c. The branch drain line 2c is made of a conducting wire electrically connected to the first drain line 2a. The branch drain line 2c is branched from the first drain line 2c at an intermediate position between both ends of the first drain line 2a. Further, the branch drain line 2c extends from the first metal foil 4 and the main secondary coating 5a.

  In the example shown in FIG. 7, the first drain line 2a and the branch drain line 2c include two conducting wires. One of the two conducting wires constitutes a portion from one end of the first drain wire 2a to the branching portion and the branch drain wire 2c. The other of the two conducting wires constitutes a portion of the first drain line 2c from the other end to the branch portion and the branch drain line 2c. In this case, the branch drain line 2c is a bundle of two conducting wires.

  In other words, in the example shown in FIG. 7, the first drain line 2 a is a part of each of the two conducting wires arranged in series. Further, the branch drain line 2c is a bundle of the remaining portions of each of the two conductors.

  A ground terminal 23 is connected to the end of the branch drain line 2c opposite to the branch. The ground terminal 23 is connected to a reference potential point (not shown).

  It is also conceivable that the first drain line 2a and the branch drain line 2c are a single conductor that is folded at the end of the branch drain line 2c. In this case, the branch drain line 2c is a bundle of conducting wires arranged in two rows by being folded. The ground terminal 23 is connected to the folded portion of the conducting wire.

  When the wire harness 10Y is employed, the same effects as when the wire harness 10 is employed are obtained. When the electromagnetic shielding function of the branch line portion 1b is not necessary, the wire harness 10Y may be employed.

  Further, the use of the wire harness 10Y is suitable when the reference potential point exists in the vicinity of the intermediate position of the first drain line 2a.

<Fourth embodiment>
Next, a wire harness 10Z according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 8 is an exploded plan view of the wire harness 10Z.

  The wire harness 10Z is different from the wire harness 10 shown in FIG. 5 only in the configuration of the drain line. In FIG. 8, the same components as those shown in FIGS. 1 to 7 are given the same reference numerals. Hereinafter, only the differences from the wire harness 10 in the wire harness 10Z will be described.

  Similarly to the wire harnesses 10 and 10X, the wire harness 10Z also has a main wire group 1X including a plurality of insulated wires, at least one first drain wire 2a, at least one second drain wire 2b, and a first metal foil 4a. The second metal foil 4b, the main line secondary coating 5a, and the branch line secondary coating 5b are provided. The main electric wire group 1X includes a main line portion 1a and a branch line portion 1b branched from the main line portion 1a. That is, the main electric wire group 1 </ b> X has a branch portion 3.

  The wire harness 10Z includes an earth wire 6 made of an insulated wire. The ground wire 6 has a joint portion 60 which is a portion where the conductor exposed from the covering of the ground terminal 6 (insulated wire) and a part of the first drain wire 2a are electrically connected.

  The joining part 60 is, for example, a part joined by crimping a caulking fitting that is a tubular metal member. Alternatively, the joint 60 may be a part joined by welding. The ground terminal 23 is connected to one end of the ground wire 6.

  In the wire harness 10 </ b> Z, the first metal foil 5 a is wound by bundling the first drain wire 2 c, the main wire portion 1 a of the main wire group 1, and a partial region including the joint portion 60 in the ground wire 6. . However, the area | region where the 1st metal foil 5a in the earth wire 6 is wound is an area | region other than the one edge part to which the earth terminal 23 was connected at least.

  Since the ground wire 6 is an insulated wire, it is not short-circuited by a surrounding conductor that is not a reference potential point in a portion other than the end portion to which the ground terminal 23 is connected. Therefore, the use of the wire harness 10Z is suitable when the end portion of the secondary coating is separated from the reference potential point.

  In the wire harness 10Z, the first drain line 2a and the second drain line 2b are electrically connected. In the example shown in FIG. 8, a joint portion 20 is formed, which is a portion where an intermediate position portion of the first drain line 2 a and an end portion of the second drain line 2 b are joined.

  The joining part 20 is a part joined by crimping of a caulking metal fitting that is, for example, a tubular metal member. Alternatively, the joint 60 may be a part joined by welding. It is also conceivable that the second drain line 2b is electrically connected to the first drain line 2a by the same structure as the branch drain line 2c shown in FIG.

  In the wire harness Z, both the first metal foil 4a and the second metal foil 4b are electrically connected to the reference potential point only by connecting one ground wire 6 to the reference potential point. Therefore, the work for short-circuiting the first metal foil 4a and the second metal foil 4b to the reference potential point becomes easy.

<Others>
In the wire harnesses 10 and 10X, when the electromagnetic shielding function of the branch line portion 1b is not necessary, the second metal foil 4b may be omitted. Further, in the wire harnesses 10 and 10X, the second metal foil 4b and the branch line secondary coating 5b may be omitted.

  It is also conceivable that the wire harnesses 10 and 10X include an insulating coating that covers the periphery of the portions of the drain wires 2a and 2b exposed from the secondary coatings 5a and 5b. For example, it is conceivable that a heat shrinkable tube is employed as the insulating coating.

  In addition, the wire harness according to the present invention can be freely combined with each of the embodiments and application examples described above within the scope of the invention described in each claim, or can be modified as appropriate according to each embodiment and application example. It is also possible to constitute by omitting or omitting a part.

1, 1X Main electric wire group 1a Main line part 1b Branch line part 2a First drain line 2b Second drain line 2c Branch drain line 3 Branch part 4a First metal foil 4b Second metal foil 5a Main line secondary coating 5b Branch line secondary coating 5X Secondary coating according to application example 6 Ground wire 8 Guide jig 9 Automatic tape winding device 10, 10X, 10Y, 10Z Wire harness 10a First insulated wire 10b Second insulated wire 11 Conductor of insulated wire 12 Insulated coating of insulated wire 13 Crimp terminal 20, 60 Joint 23 Ground terminal 41 First edge of metal foil 42 Second edge of metal foil 50 Adhesive tape 51 First edge of laminate film 52 Second edge of laminate film 91 Conveying roller 92 Tape Winding mechanism 100 Joint L0 A series of lines

Claims (7)

A main wire group including a main line portion including an insulated wire along a series of wires and a branch line portion including an insulated wire branched from the main line portion at an intermediate position between both ends of the main line portion;
A first drain line made of a conducting wire along the main line portion of the main electric wire group;
The first drain line and the main electric wire group are in a state in contact with the first drain line, and in a state where the first edge and the second edge on the opposite side are along the extending direction of the first drain line. A first metal foil that is wound around the bundle of main line portions and covers the periphery of the bundle;
A wire harness comprising a main wire secondary coating made of a tape of a non-conductive material wound around the first metal foil and covering the first metal foil. The wire harness according to claim 1,
The main wire secondary coating is a wire harness that is an adhesive tape wound around the first metal foil. The wire harness according to claim 1 or 2, wherein
A second drain line made of a conductive wire along the branch portion of the main electric wire group;
In a state in contact with the second drain line, and in a state in which the first edge and the second edge on the opposite side are along the extending direction of the second drain line, the second drain line and the main electric wire group A second metal foil wound around the bundle of branch lines and covering the periphery of the bundle;
The wire harness further comprising: a branch secondary coating made of a tape of a non-conductive material wound around the second metal foil and covering the second metal foil. The wire harness according to claim 3,
The branch line secondary coating is a wire harness, which is an adhesive tape wound around the second metal foil. The wire harness according to any one of claims 1 to 4,
The said branch line part of the said main electric wire group is a wire harness containing the 2nd insulated wire joined to the 1st insulated wire which comprises the said main line part. The wire harness according to claim 1 or 2, wherein
A conductive wire electrically connected to the first drain wire, branched from the first drain wire at an intermediate position between both ends of the first drain wire, and the first metal foil and the main wire secondary coating A wire harness further comprising a branch drain line extending from the wire harness. The wire harness according to any one of claims 1 to 5,
A ground wire comprising an insulated wire, further comprising a joint that is a portion where the conductor exposed from the coating in the insulated wire and a part of the first drain wire are electrically connected,
The first metal foil is a wire harness in which the first drain wire, the main wire portion of the main wire group, and a region including the joint portion other than at least one end portion of the ground wire are bundled and wound. .

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