JP2010282773A - Wire harness for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress increase in size of a wire harness for a vehicle, and to improve shielding property. <P>SOLUTION: The wire harness includes an electric wire group 11 consisting of a plurality of round electric wires 12 of which a core wire is covered with an insulating cover, and a flat wire material 21 for a ground circuit or power supply circuit, in which a band-like conductor of metal foil or a flexible metal plate is covered with an insulating resin film. The flat wire material for circuit is wound with no gap on an outer periphery of the electric wire group consisting of the round electric wires, to be used as a shielding material as well. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicular wire harness, and more particularly, to suppress the enlargement of the wire harness and improve shielding performance.

  In recent years, the number of electric and electronic components mounted on automobiles has increased rapidly, and the number of wires in a wire harness that supplies power and signals to these electric and electronic components has increased. As shown in FIG. 9, the conventional wire harness 1 is formed by converging a large number of round electric wires 2 each having a core wire 3 covered with an insulating coating 4 and binding them with a tape 5.

  These wire harnesses 1 also include a ground wire 2a as shown in FIG. Since a large-diameter thick wire is generally used for the ground wire 2a having a large amount of current, if a plurality of ground wires 2a are included, the outer diameter of the entire wire harness increases and the weight increases. There was a problem. In particular, when this wire harness is routed in the instrument panel of a vehicle, a large number of electrical components are accommodated in the instrument panel and the wiring space for the wire harness is limited. It is required not to enlarge. In addition, in the case of floor harnesses that are routed from the junction box mounted below the instrument panel to the rear side, the outer diameter of the wire harness is enlarged so that it can be routed along a flat floor. It is demanded to suppress this.

  In addition, a conventional wire harness made of a group of round electric wires is not surrounded by a shield layer, and therefore, an electric wire that needs to be shielded needs to be a shielded electric wire described in, for example, Japanese Patent Application Laid-Open No. 2007-184172. However, when the number of shielded wires increases in the wire group bound as a wire harness, there is a problem that the outer diameter of the wire harness is enlarged and the wire cost is increased.

JP 2007-184172 A

  This invention is made | formed in view of the said problem, and makes it a subject to provide the wire harness for vehicles provided with the shield function while being able to suppress the enlargement of a wire harness.

In order to solve the above-mentioned problems, the present invention provides a grounding group in which an electric wire group composed of a plurality of round electric wires whose core wires are covered with an insulating coating, and a strip-like conductor made of a metal foil or a flexible metal plate is covered with an insulating resin film. Circuit flat wire for circuit or power supply circuit,
A wire harness for a vehicle is provided in which the flat wire material for a circuit is wound around an outer periphery of a group of electric wires made of the round electric wires and is also used as a shielding material.

  The wire harness for a vehicle having the above configuration is a flat wire since the ground wire or power supply wire of the large current circuit is a thick wire, and the outer diameter of the wire group is reduced by reducing the number of thick wires in the group of wires to be converged. At the same time, the ground circuit or power supply circuit, which is a flat wire, is wound around the outer periphery of the wire group and also used as a shield material, so that the enlargement of the outer diameter of the wire harness can be suppressed and a shield function can also be provided. . Further, since the circuit flat wire is wound around the electric wire group, the function of a binding tape conventionally used for binding the electric wire group can be provided.

  The flat wire may be wound around the outer periphery of the electric wire group from the viewpoint of providing a shielding function, and the winding method is not limited. When the wire harness is long, it is preferable that the wire harness is wound with a spiral winding, preferably a half wrap winding without a gap. When the wire harness is short, it may be a longitudinal winding (so-called sushi winding) along the length direction, and a worship winding that overlaps both ends in the width direction.

  The strip conductor of the flat wire rod for a circuit that is also used as the shield material may be either a metal foil such as a copper foil or a metal plate such as a thin and flexible copper plate. preferable.

  It is preferable that the flat wire used also as the shield material is a flat ground wire in which a wire for an earth circuit serving as a thick wire is a flat wire. In addition, it is preferable that the number of the flat ground wire is one and the strip conductor of the single flat ground wire is one wide strip conductor.

The strip conductor of the flat ground wire preferably has a width of 10 mm or more and a thickness of 50 μm or more and 200 μm or less.
The reason why the width is 10 mm or more is that when the width is less than 10 mm, the entire circumference of the electric wire group cannot be wound in the case of vertical winding, and in the case of spiral winding, the number of windings is increased and workability is deteriorated. In addition, the thickness of 50 μm or more and 200 μm or less is too thin if it is less than 50 μm, and the allowable current amount as a conductor for a large current circuit is insufficient, and if it exceeds 200 μm, it is too thick and lacks flexibility. Due to the difficulty of wrapping around the circumference

A plurality of connector connection terminals are connected to one end or both ends of the flat ground wire by welding, soldering, piercing with a piercing terminal, or crimping at intervals in the width direction of the strip conductor.
In this way, by connecting a plurality of terminals to the terminal of the flat ground wire made of one conductor, it is possible to individually connect the terminal to the terminal of the ground wire terminal of another wire harness.

  In addition, a plurality of connector connection terminals are connected to the middle portion of the flat ground wire in the longitudinal direction by welding, soldering, or piercing with a piercing terminal at intervals in the width direction of the strip conductor, A terminal connected to the terminal of the ground wire wired in the group may be pulled out from the wire group and connected to the connector connecting terminal of the flat ground wire.

A plurality of connector connection terminals are connected to one end of the flat ground wire, and a ground terminal is directly connected to the other end, and the flat ground wire is extended from the portion wound around the electric wire to the vehicle body so that the ground terminal is connected to the vehicle body. It may be possible to be grounded.
Alternatively, a connector connection terminal is connected to both ends of the flat ground wire, a ground terminal is connected to one end, and a connector is connected to another ground flat ground wire having a connector connection terminal connected to the other end. The ground terminal of the flat ground wire may be grounded to the vehicle body.
If the flat ground wire can be grounded to the vehicle body as described above, the flat wire material also serving as a shield material can be easily grounded to the vehicle body.

  When using a power wire for a thick wire as a flat wire material also serving as a shield material, connect the connector connection terminals to both ends of the flat wire material for the power supply circuit, and connect a connector to the power wire terminal of another wire harness. Or it connects with the connector provided in the electrical junction box, and is connected with the power supply circuit in an electrical junction box.

  Furthermore, when there is a flat wire for another circuit in the wire bundled as a wire harness, it is preferable that the flat wire is overlapped with the flat ground wire and wound around the outer circumference of the round electric wire group. In that case, it is preferable to wind a flat ground wire around the outer peripheral side.

  In addition, when inserting a wire harness in a protector, you may attach to the inner wall of a protector along the inner wall instead of winding the said flat wire around an electric wire group.

  As described above, according to the present invention, as a ground wire or a power wire made of a thick wire is used as a flat wire, it is possible to suppress the enlargement and weight of the wire harness by winding the wire around the outer periphery of the round wire group. It is possible to provide a shielding effect without using any shielding material.

It is a perspective view which shows the wiring structure of the wire harness which concerns on 1st embodiment of this invention. (A) (B) is a perspective view which shows the terminal connection form to the terminal part of a flat ground wire. The connector connection method to the intermediate part of a flat ground wire is shown, (A) is a perspective view which shows the state which connected the terminal to the intermediate part, (B) is a partial cross section which shows the state which latched the terminal to the connector FIG. It is a perspective view which shows the connector connection structure of an earth wire terminal. It is a perspective view which shows the modification 1 of 1st embodiment. It is a perspective view which shows the wiring structure of the wire harness which concerns on 2nd embodiment of this invention. It is a perspective view which shows the wiring structure of the wire harness which concerns on 3rd embodiment of this invention. It is a perspective view which shows the state which lined the flat earth wire to the protector shown in FIG. It is sectional drawing which shows the example of the electric wire group of the conventional wire harness.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 5 show a vehicle wire harness 10 according to a first embodiment of the present invention.
As shown in FIG. 1, the wire harness 10 includes an electric wire group 11 in which a plurality of round electric wires 12 whose core wires are covered with an insulating coating are bundled to have a circular cross section, and a belt-like conductor 22 made of a wide and strip-like copper foil. It consists of the flat wire material for circuits formed by laminating with the film 23. In this embodiment, the flat ground wire 21 in which the circuit flat wire material is used for an earth circuit is wound around the outer periphery of the electric wire group 11 without a gap.

The round electric wires 12 constituting the electric wire group 11 are composed of signal wires and power wires, and the ground wires are grouped as the flat ground wires 21. As the flat ground wire 21, a ground wire 12 a made of a round electric wire not preliminarily arranged is provided on one end side of the wire harness 10, and the ground wire 12 a is drawn from the middle of the wire harness 10 as shown in FIG. The wire 21 and the connectors 14 and 17 are connected.
The width | variety of the strip | belt-shaped conductor 22 of the flat earth wire 21 shall be 10-50 mm, and thickness is 50 micrometers-200 micrometers.

At one end of the flat ground wire 21, as shown in FIG. 2A, connector connection terminals 15 connected to the connector 16 are connected with an interval in the width direction. In this embodiment, the connector connecting terminal 15 is a piercing terminal, and the conductor resin exposed portion 24 is provided by peeling off the insulating resin film 23 on one surface side of the flat ground wire 21, and as shown in FIG. After the 15 protruding pieces 15c are pierced into the conductor exposed portion 24, the protruding pieces 15c are folded inward to be electrically connected. These piercing terminals 15 are inserted and locked to the connector 16 so that one end of the flat ground wire 21 is connected to the connector.
Further, as shown in FIG. 1, one ground terminal 18 is directly connected to the other end of the flat ground wire 21 by welding to the conductor exposed portion 24.

Further, as shown in FIGS. 3 (A) and 3 (B), a connector connecting terminal 15 including a piercing terminal is also formed in a belt-like shape at the intermediate portion in the length direction of the flat ground wire 21. The conductor 22 is connected. The connector connecting terminal 15 is inserted and locked to the connector 17.
As shown in FIG. 4, a terminal 13 connected to the end of the ground wire 12a made of a round electric wire is inserted into the connector 14, and is fitted and connected to a connector 17 into which the connector connection terminal 15 of the flat ground wire 21 is inserted. By doing so, the ground wire 12 a can be connected to the flat ground wire 21 by a connector in the middle of the wire harness 10.

As shown in FIG. 1, the flat ground wire 21 is spirally wound around the outer peripheral surface of the wire group 11 including the round electric wires 12 without a gap, and a portion connected to the connector 16 on one end side in the length direction is connected to the winding portion. It extends and is fitted and connected to a connector (not shown) of a flat ground wire 21 wound around another wire harness. Or it fits into the connector accommodating part provided in the electrical junction box.
The other end side of the flat ground wire 21 is also extended from the portion wound around the wire group 11, and the ground terminal 18 is disposed on the ground terminal mounting portion of the vehicle body panel, and is fixed with a bolt (not shown) and grounded. Yes.

The flat ground wire 21 is pulled out as shown in FIG. 1 in the middle of the portion wound around the wire group 11, and the connector 17 and the round wire are inserted and locked to the connector connecting terminal 15 attached to the intermediate portion. The ground wire 12a is connected to the flat ground wire 21 by fitting the connector 14 to which the ground wire 12a is connected.
In the above embodiment, the connector connection terminal and the flat ground wire are connected using the piercing terminal, but may be crimped connection, solder connection, or welding.

Since the wire harness 10 having the above-described configuration has the flat ground wire 21 wound around the outer periphery of the electric wire group 11, the flat ground wire 21 functions as a shield layer, and suppresses radiation of electromagnetic noise from the entire wire harness 10, and Shielding from external electromagnetic noise can be achieved.
And since the conductor size of the flat ground wire 21 can be made smaller than a round electric wire, the outer diameter of the whole wire harness 10 can be made small, and the enlargement and weight increase of the wire harness 10 can be suppressed. In addition, when there is a round wire ground wire 12a that is not grouped as the flat ground wire 21, it can be connected to the flat ground wire 21 via the connectors 14 and 17 in the middle of the wire harness. Can be grounded together.

  Furthermore, since the strip-shaped conductor 22 of the flat ground wire 21 is wide, the number of windings is not increased when spirally wound around the outer periphery of the wire group 11, and workability is good. Further, since the strip-shaped conductor 22 is made thick, there is a sufficient allowable current amount for the ground circuit.

  In addition, the connection form of the terminal part and the intermediate part of the flat ground wire 21 and the connector terminal was formed by peeling the insulating resin film 23 on the one surface side of the flat ground wire 21 as in Modification 1 shown in FIG. The conductor connection portion 20 a of the connector connection terminal 20 may be welded to the conductor exposed portion 24.

FIG. 6 shows a wire harness 10-1 according to the second embodiment of the present invention.
In this embodiment, the electric wire group 11 does not have a round electric wire, but is composed only of small and medium-diameter power wires and signal electric wires, and the flat electric wire 21 is wound around the outer circumference of the electric wire group 11 by vertical winding. ing. The tape 25 is wound around a plurality of locations on the outer periphery of the flat ground wire 21 to fix the winding state of the flat ground wire 21. The width of the flat ground wire 21 is set such that the width of the strip conductor 22 is larger than the outer diameter of the wire group 11.

One terminal portion of the flat ground wire 21 extends from a portion wound around the wire group 11, the terminal portion is connected to the connector 16, and the ground terminal 18 connected to the other terminal portion is wound around the wire group 11. It extends from the part. A ground wire (not shown) is connected to the connector 16, and the ground terminal 18 is grounded to the vehicle body.
Other configurations are the same as those in the first embodiment. Further, the flat ground wire 21 may be spirally wound as in the first embodiment.

7 and 8 show a wire harness 10-2 according to a third embodiment of the present invention.
The wire harness 10-2 is a portion through which the wire group 11 including only the small and medium diameter round electric wires 12 is passed through the protector 30, and a flat ground wire 21 is lined on the protector 30.

  As shown in FIG. 8, the protector 30 is formed integrally with a lid 32 that opens and closes via a hinge 33 at the upper end of one side wall of a bowl-shaped main body 31, and as shown in FIG. The main body 31 can be locked and closed. As shown in FIG. 8, a flat ground wire 21 is attached to the entire inner wall of the protector 30 from the main body 31 to the lid 32 with an adhesive. At the time of this pasting, the flat ground wire 21 is arranged so that the length direction of the flat ground wire 21 is parallel to the length direction of the protector 30, and both end portions of the flat ground wire 21 in the length direction are opened from both end openings 34 of the protector 30. It is extended.

A connector 16 is electrically connected to one terminal portion of the flat ground wire 21, and a ground terminal 18 is connected to the other terminal portion. The connector 16 is connected to a ground wire (not shown), and the ground terminal 18 is grounded to a vehicle body (not shown).
Other configurations are the same as those in the first and second embodiments.

  In the present embodiment, the portion where the wire harness 10-2 is inserted into the protector 30 is the same as the state in which the flat ground wire 21 lining the protector 30 is wound around the outer periphery of the electric wire group 11 by vertical winding.

In addition, this invention is not limited to the said embodiment and modification.
A flat wire rod for a circuit also serving as the shield may be formed using a power supply circuit line. In that case, the terminal of the flat wire is not connected to the ground terminal, but is connected to a connector and connected to an electrical component or an electrical connection box.
Moreover, when there exists another flat wire in the electric wire group converged with a wire harness, it may be wound around a round electric wire group as an inner peripheral side in piles on the flat wire material for a circuit also serving as a shield.

DESCRIPTION OF SYMBOLS 10, 10-1, 10-2 Wire harness 11 Electric wire group 12 Round electric wire 12a Ground wire 14 Connector 15 Piercing terminal 16, 17 Connector 18 Ground terminal 21 Flat ground wire which consists of a flat wire for shielding material and circuit 22 Strip conductor 23 Insulation Resin film

Claims (7)

A wire group consisting of a plurality of round electric wires whose core wires are covered with an insulation coating, and a flat wire material for a circuit for an earth circuit or a power supply circuit in which a strip conductor made of a metal foil or a flexible metal plate is covered with an insulating resin film With
A wire harness for a vehicle, wherein the circuit flat wire is wound around an outer periphery of a group of electric wires composed of the round electric wires and is also used as a shielding material.   The wire harness for a vehicle according to claim 1, wherein the flat wire for circuit that is also used as the shielding material is a single flat ground wire for an earth circuit, and a strip conductor of the flat ground wire is a single wide strip conductor. .   The wire harness for a vehicle according to claim 2, wherein the flat conductor of the flat ground wire has a width of 10 mm or more and a thickness of 50 µm or more and 200 µm or less.   2. A plurality of connector connection terminals are connected to one or both ends of the flat ground wire by welding, soldering, piercing with a piercing terminal, or crimping at intervals in the width direction of the strip conductor. Or the wire harness for vehicles of Claim 2.   A plurality of connector connection terminals are connected to the middle portion of the flat ground wire in the length direction by welding, soldering, or piercing with a piercing terminal at intervals in the width direction of the strip conductor, The vehicle wire harness according to claim 1 or 2, wherein a terminal connected to a terminal of an earth wire wired to the terminal is pulled out from an electric wire group and connected to a connector connecting terminal of the flat ground wire. A plurality of connector connection terminals are connected to one end of the flat ground wire, and a ground terminal is directly connected to the other end, and the flat ground wire is extended from the portion wound around the electric wire to the vehicle body so that the ground terminal is connected to the vehicle body. To be able to ground
Alternatively, a connector connection terminal is connected to both ends of the flat ground wire, a ground terminal is connected to one end, and a connector is connected to another ground flat ground wire having a connector connection terminal connected to the other end. The vehicle wire harness according to claim 4 or 5, wherein an earth terminal of the flat earth wire for a vehicle can be grounded to the vehicle body.   Furthermore, the flat wire material for other circuits is provided, This flat wire material is piled up with the said flat wire material for circuits also used as a shield material, and is wound around the outer periphery of the said round electric wire group. The vehicle wire harness described in 1.

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