JP2017126419A - Shield electric wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily earth-connect a plurality of shield layers.SOLUTION: Provided is a shield electric wire 10 comprising: at least one wiring member (e.g., a first wiring member 20 and a second wiring member 30); and a plurality of shield layers (e.g., a first shield layer 40 and a second shield layer 50) covering at least one wiring member at separate places; and one drain wire 60 disposed so as to pass through the plurality of shield layers and connected to the plurality of shield layers, respectively. Preferably, the edge part of the drain wire 60 is connected with a connector terminal or an earth terminal 70.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for grounding a shield layer of an electric wire via a drain line.

  Patent document 1 is disclosing the shielded electric wire provided with the several core electric wire, the drain wire, and the shield layer formed in these outer periphery.

  Patent Document 2 discloses a plurality of core electric wires, a shield layer that covers the outer periphery of the plurality of core electric wires, a drain line disposed along the outer periphery of the shield layer, and the drain wire from the outer peripheral side of the shield layer. A shielded electric wire is provided that includes a drain wire holding portion that holds the wire in a state of being pressed toward the shield layer.

JP 2000-251548 A JP 2012-138187 A

  In the techniques disclosed in Patent Documents 1 and 2, when a plurality of shield layers need to be grounded, the drain lines connected to the respective shield layers are separately grounded, or one drain line is connected It is conceivable to make a splice connection to the other drain line and to ground the other drain line.

  For this reason, there is a problem that work and structure for ground connection become complicated due to separate ground connection work or splice connection work.

  Therefore, an object of the present invention is to enable a plurality of shield layers to be easily connected to the ground.

  In order to solve the above-described problem, a shielded electric wire according to a first aspect includes at least one wiring member, a plurality of shield layers covering the at least one wiring member at different locations, and the plurality of shield layers. And a drain line connected to each of the plurality of shield layers.

  A second aspect is a shielded electric wire according to the first aspect, wherein the drain wire includes a core wire and a coating that covers the core wire except at least a part of the core wire that passes through the plurality of shield layers. It is a waste.

  A 3rd aspect is a shielded electric wire which concerns on the 1st or 2nd aspect, Comprising: The said at least 1 wiring member is the 2nd comprised as a 1st wiring member and the said 1st wiring member as a different body. The plurality of shield layers include a first shield layer that covers the first wiring member and a second shield layer that covers the second wiring member, and the drain line includes the first shield layer. A shield layer and a second shield layer are disposed so as to be connected to the first shield layer and the second shield layer.

  A 4th aspect is a shielded electric wire which concerns on the 1st or 2nd aspect, Comprising: These shield layers are the 1st place shield layer provided in the different place in the wiring path | route in the said wiring member, and 1st The drain line is disposed to pass through the first place shield layer and the second place shield layer, and is connected to the first place shield layer and the second place shield layer. It is what.

  A fifth aspect is a shielded electric wire according to any one of the first to fourth aspects, and further includes a connector terminal or a ground terminal connected to an end of the drain line.

  According to the first aspect, one drain line is disposed so as to pass through the plurality of shield layers, and is connected to each of the plurality of shield layers. As a result, the plurality of shield layers can be made equipotential by one drain line, and the plurality of shield layers can be easily grounded.

  According to the 2nd aspect, the damage with respect to the core wire of a drain wire can be suppressed between several shield layers.

  According to the 3rd aspect, the 1st shield layer and the 2nd shield layer which are provided in each of the 1st separate wiring member and the 2nd wiring member can be made equipotential with one drain line.

  According to the 4th aspect, the 1st place shield layer and the 2nd place shield layer which were provided in the different place in the wiring path | route in a common wiring member can be equalized with one drain line.

  According to the fifth aspect, the drain line can be grounded through the connector terminal or the ground terminal.

It is the schematic which shows the shielded electric wire which concerns on 1st Embodiment. It is explanatory drawing which shows the manufacturing process of a shielded electric wire same as the above. It is explanatory drawing which shows the manufacturing process of a shielded electric wire same as the above. It is explanatory drawing which shows the manufacturing process of a shielded electric wire same as the above. It is the schematic which shows the shielded electric wire which concerns on a modification. It is the schematic which shows the shielded electric wire which concerns on 2nd Embodiment. It is the schematic which shows the shielded electric wire which concerns on a modification.

{First embodiment}
Hereinafter, the shielded electric wire according to the first embodiment will be described. FIG. 1 is a schematic view showing a shielded electric wire 10 according to the first embodiment.

  The shielded electric wire 10 includes at least one wiring member 20, 30, a plurality of shield layers 40, 50, and one drain line 60.

  The shielded electric wire 10 includes a first wiring member 20 and a second wiring member 30 as at least one wiring member 20, 30. The first wiring member 20 includes at least one electric wire 22 and is used as a wiring for electrically connecting electric devices in a vehicle or the like. The second wiring member 30 includes at least one electric wire 22 and is used as a wiring for electrically connecting electric devices in a vehicle or the like. The first wiring member 20 and the second wiring member 30 are configured as separate bodies that are physically separated except for the connection portion by the drain line 60. The first wiring member 20 and the second wiring member 30 are arranged along separate wire harness arrangement paths in a vehicle or the like.

  Here, the first wiring member 20 includes a plurality of electric wires 22. The electric wire 22 may be called a core electric wire. The electric wire 22 is a general electric wire in which a coating is formed on the outer periphery of the core wire. The core wire may be a single wire or an assembly wire in which a plurality of strands are twisted together. The electric wire 22 has a role of transmitting various electric signals or electric power in the shielded electric wire 10.

  The plurality of electric wires 22 are bundled into one. The plurality of electric wires 22 may be bundled in a twisted state, or may be bundled without being twisted. Moreover, the some electric wire 22 may be bundled so that it may branch on the way. Further, the first wiring member may be configured to include only one electric wire.

  A connector terminal 24 is crimped to each end of each electric wire 22 (see FIG. 2). The connector terminal 24 at the end of the electric wire 22 extends outward from the end of the shield layer 40. And each connector terminal 24 is inserted in the cavity of the connector 26, and is electrically connected to the various electrical components mounted in a vehicle via a connector connection etc.

  About the 2nd wiring member 30, since it is the same structure as the said 1st wiring member 20, the description is abbreviate | omitted. However, the first wiring member 20 and the second wiring member do not have to have the same number of wires 22, and the bundling state (the presence or absence of branching, the length, etc.) of the plurality of wires 22 is the same. There is no need.

  The plurality of shield layers 40 and 50 cover the first wiring member 20 and the second wiring member 30 as the at least one wiring member at different places. Here, the plurality of shield layers 40 and 50 include a first shield layer 40 that covers the first wiring member 20 and a second shield layer 50 that covers the second wiring member 30.

  The first shield layer 40 and the second shield layer 50 are wiring locations in the first wiring member 20 and the second wiring member 30 that should suppress external noise, or wiring that should suppress noise emission to the outside. It is provided in places. In particular, the first shield layer 40 and the second shield layer 50 are additionally or partially applied to the first wiring member 20 and the second wiring member 30 including the general electric wire 22 as necessary. It is what is done.

  The first shield layer 40 may have a single layer structure or a multi-layer structure. As the sheet for forming the first shield layer 40, a metal foil such as an aluminum foil or a braid knitted with a metal wire can be used. When a metal foil is used as the first shield layer 40, for example, a rectangular metal foil may be disposed along the plurality of bundled electric wires 22 and covered so as to enclose the plurality of electric wires 22. (So-called vertical attachment). Alternatively, the metal foil tape may be spirally wound around the outer periphery of the bundled electric wires 22. In these cases, the state in which the metal foil covers the plurality of electric wires 22 may be maintained by an adhesive tape wound around the outer periphery thereof, or by an adhesive layer or a heat fusion layer provided on the metal foil itself. May be maintained.

  The second shield layer 50 has the same configuration as the first shield layer 40.

  Specific examples of the manufacturing method of the first shield layer 40 and the second shield layer 50 will be described later.

  One drain line 60 is disposed so as to pass through the plurality of shield layers 40 and 50, and is connected to each of the plurality of shield layers 40 and 50.

  The drain line 60 is a conductive line having a bare state portion that is not coated. Here, the drain wire 60 includes a core wire 62 and a coating 64. The core wire 62 is a conductive wire constituted by a single wire or a stranded wire. The coating 64 covers the core wire 62 except for at least a part of the core wire 62 that passes through the plurality of shield layers 40 and 50. For example, the drain line 60 is formed by removing the covering of a general covered electric wire at a portion passing through the plurality of shield layers 40 and 50.

  More specifically, one end portion 60a of the drain wire 60 is bundled together with the electric wires 22 of the first wiring member 20, and the first shield layer 40 is provided so as to cover the outer periphery thereof. Thereby, one end of the drain line 60 is disposed so as to pass through the first shield layer 40. Further, in at least a part (here, the whole) of the drain wire 60 disposed inside the first shield layer 40, the covering 64 is removed, and the core wire 62 is exposed. Thereby, the core wire 62 of the drain line 60 contacts the inner peripheral surface of the first shield layer 40, and the core wire 62 and the first shield layer 40 are electrically connected.

  Moreover, the extending direction intermediate portion 60c of the drain line 60 is bundled together with the electric wires 22 of the second wiring member 30, and the second shield layer 50 is provided so as to cover the outer periphery thereof. Thereby, the extending direction intermediate portion 60 c of the drain line 60 is disposed so as to pass through the second shield layer 50. Further, in at least a part (here, the whole) of the drain wire 60 disposed inside the second shield layer 50, the covering 64 is removed, and the core wire 62 is exposed. Thereby, the core wire 62 of the drain line 60 contacts the inner peripheral surface of the second shield layer 50, and the core wire 62 and the second shield layer 50 are electrically connected.

  The connection configuration between the drain line 60 and the shield layers 40 and 50 is not limited to the above example. The drain line 60 and the shield layers 40 and 50 may be connected by welding or the like. Further, the drain line 60 may be wound around the outer periphery of the shield layers 40 and 50. Further, the drain line may have a configuration in which the conductor portion is exposed over the entire longitudinal direction, that is, a configuration including only the core wire.

  The relay part 60b between the one end part 60a of the drain line 60 and the extending direction intermediate part 60c has a position where the first wiring member 20 and a position where the second wiring member 30 are arranged in the vehicle. The length is set according to the distance. For this reason, in the state which assembled | attached the 1st wiring member 20 and the 2nd wiring member 30 to the vehicle, between the 1st shield layer 40 and the 2nd shield layer 50 can be connected by the relay part 60b. The relay portion 60b is provided with a coating 64.

  The other end 60d of the drain line 60 extends outward from the second shield layer 50. A ground terminal 70 is connected to the tip of the other end 60d. The ground terminal 70 is a terminal that can be connected to a ground part in a vehicle or the like. Here, the ground terminal 70 is a round terminal having a round hole formed in a plate-like portion. The ground terminal 70 is fixed and electrically connected to the ground part by bolting or the like.

  The example of a manufacturing method of the said shielded electric wire 10 is demonstrated.

  First, as shown in FIG. 2, a first wiring member 20 in which a plurality of electric wires 22 are bundled and a second wiring member 30 in which a plurality of electric wires 22 are bundled are prepared. In this state, the connector terminal 24 at the end of the electric wire 22 is inserted into the connector 26, but this is not always necessary. After forming the shield layers 40 and 50, each connector terminal 24 may be inserted into the connector 26. Then, one end portion 60 a of the drain wire 60 is disposed along the electric wire 22 of the first wiring member 20, and an extending direction intermediate portion 60 c of the drain wire 60 is disposed along the electric wire 22 of the second wiring member 30. To do. At this time, the ground terminal 70 is preferably connected to the other end 60d of the drain line 60, but this is not essential.

  Next, as shown in FIG. 3, the rectangular metal foil 40 </ b> B is wound around the plurality of electric wires 22 of the first wiring member 20 and one end portion 60 a of the drain wire 60. Further, the rectangular metal foil 50 </ b> B is wound around the plurality of electric wires 22 of the second wiring member 30 and the intermediate portion 60 c in the extending direction of the drain wire 60.

  Thereafter, as shown in FIG. 4, the adhesive tape T is wound around the metal foils 40B and 50B, and the wound state of the metal foils 40B and 50B is maintained. Thereby, the first shield layer 40 and the second shield layer 50 are formed.

  The shielded electric wire 10 can be manufactured through the above steps.

  According to the shielded electric wire 10 configured as described above, one drain wire 60 is disposed so as to pass through the plurality of shield layers 40 and 50 and is connected to each of the plurality of shield layers 40 and 50. Yes. As a result, the plurality of shield layers 40 and 50 can be made equipotential by the single drain line 60, and the plurality of shield layers 40 and 50 can be easily grounded.

  Moreover, since the drain wire 60 includes the coating 64 that covers the core wire 62 except for at least a part of the core wire 62 that passes through the plurality of shield layers 40 and 50, the drain wire 60 can be easily connected to the shield layers 40 and 50 while The damage to the core wire 62 can be suppressed between the shield layers 40 and 50.

  In addition, the first wiring member 20 and the second wiring member 30 are provided as at least one wiring member, and the first shield layer 40 and the second wiring covering the first wiring member 20 as the plurality of shield layers 40 and 50 are provided. Since the second shield layer 50 that covers the member 30 is included, the first shield layer 40 and the second shield layer 50 that are respectively provided on the separate first wiring member 20 and second wiring member 30 are provided as one drain. It can be made equipotential by the line 60 and can be easily grounded. In particular, when there are three or more shield layers, it is effective in that three or more shield layers can be grounded with one earth connection configuration.

  In addition, since the ground terminal 70 is connected to the other end portion 60d of the drain line 60, the spline connection or the like can be omitted using the one drain line 60, so that the connection to the ground part can be performed more easily.

  Note that it is not essential to connect the drain line 60 to the ground part. For example, the other end of the drain line 60B corresponding to the drain line 60 is connected to the second shield layer 50 as in the modification shown in FIG. It does not extend outward and is not connected to the ground terminal 70. Instead, the ground connection line 90 is connected to the second shield layer 50, and the second shield layer 50 is grounded via the ground connection line 90. Here, the core wire is exposed at one end of the ground connection wire 90, and the exposed core wire is wound around the outer periphery of the second shield layer 50 (in the case where the tape is wound, the inside thereof). Disclosed examples. Further, a ground terminal 70 is connected to the other end of the ground connection line 90, and this ground terminal 70 is connected to the ground part. In this modification, the first shield layer 40 is grounded via the drain line 60 </ b> B, the second shield layer 50, and the ground connection line 90.

  In the first embodiment, the example in which at least one wiring member 20 and 30 is two has been described. However, when a shield layer is formed for each of three or more wiring members, those If drain lines are arranged so as to pass through three or more shield layers, it becomes possible to make three or more shield layers equipotential with one drain line, as described above, and they can be easily grounded. Can be connected.

  If there are a large number of wiring members that require a shield layer, it is preferable to divide them into a plurality of groups and to make each shield layer equipotential with a single drain line for each group. Thereby, it can suppress that a drain line becomes long too much.

{Second Embodiment}
The shielded electric wire 110 according to the second embodiment will be described. FIG. 6 is a schematic view showing a shielded electric wire 110 according to the second embodiment. In the description of the second embodiment, the same components as those described in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the first embodiment, the example in which the first wiring member 20 and the second wiring member 30 are provided as the at least one wiring member 20 and 30 has been described. However, in the second embodiment, at least one wiring member is provided. An example of a single wiring member 120 will be described.

  That is, the shielded electric wire 110 includes a single wiring member 120, a plurality of shield layers 140 and 150, and a single drain wire 160.

  The wiring member 120 includes at least one electric wire 22. Here, the wiring member 120 includes a plurality of electric wires 22, and the plurality of electric wires 22 are bundled in a form that branches in the middle. Here, a portion where the plurality of electric wires 22 are bundled in the largest number is referred to as a trunk portion 121, and two portions branched from the trunk portion 121 are referred to as a branch portion 122. However, it is not essential that the wiring member 120 is branched in the middle.

  The plurality of shield layers 140 and 150 include a first place shield layer 140 and a second place shield layer 150 provided at different places in the wiring route of the common wiring member 120. Here, the first place shield layer 140 is provided on at least a part of the main line 121. Further, the second location shield layer 150 is provided at one branch portion 122. Such partial shield layers 140 and 150 are, for example, in the case where an electromagnetic wave generation source is present in the middle of the wiring path of the wiring member 120 or in the middle of the wiring path of the wiring member 120 as much as possible. This is provided when there is an electrical device or the like to be excluded.

  The drain line 160 is disposed so as to pass through the first place shield layer 140 and the second place shield layer 150 and is connected to the first place shield layer 140 and the second place shield layer 150. That is, one end portion 160 a of the drain line 160 is disposed so as to pass inside the second place shield layer 150 and is connected to the second place shield layer 150. The intermediate portion 160 c in the extending direction of the drain line 160 is disposed so as to pass inside the first place shield layer 140 and is connected to the first place shield layer 140. A relay portion 160 b between the one end portion 160 a and the intermediate portion 160 c of the drain line 160 is disposed along the wiring member 120. Further, the other end 160 d of the drain line 160 extends from the first place shield layer 140 to the outside. A ground terminal 70 is connected to the other end of the first place shield layer 140.

  Since the configurations of the shield layers 140 and 150 and the drain line 160 and their connection configurations are the same as the configurations of the shield layers 40 and 50 and the drain line 60 described in the above embodiment and their connection configurations. Detailed description thereof will be omitted.

  Also in the second embodiment, as in the first embodiment, the plurality of shield layers 140 and 150 can be made equipotential by one drain line 160, and the plurality of shield layers 140 and 150 can be simplified. Can be grounded.

  In addition, the drain wire 160 is configured to include a covering that covers the core wire except for at least a portion passing through the plurality of shield layers 140 and 150, so that the drain wire 160 can be easily connected to the shield layers 140 and 150. Damage to the core wire 62 can be suppressed between the plurality of shield layers 140 and 150.

  In addition, the ground terminal 70 connected to the other end portion 160d of the drain line 160 makes it easier to connect to the ground portion.

  7, the ground terminal 70 is omitted, and instead, one end portion of the drain line 160B corresponding to the drain line 160 is led out from the second place shield layer 150 to the end portion thereof. The connector terminal 124 may be connected to the connector. In this case, a connector 130 that can accommodate the connector terminal 124 is preferably used. And it is good to connect to the earth | ground site | part in a vehicle through the connector terminal for earth | ground in the other party connector connected to the connector 130, etc.

  In the second embodiment, three or more shield layers may be provided for one wiring member 120, and the drain line may be disposed so as to pass through the three or more shield layers. As a result, similarly to the above, it becomes possible to make three or more shield layers equipotential with one drain line, and they can be easily grounded.

{Modifications}
In each of the above embodiments and modifications, both ends of the drain line may be grounded.

  Moreover, each structure demonstrated by said each embodiment and each modification can be suitably combined unless it mutually contradicts. For example, in the first embodiment, a connector terminal may be connected to the end of the drain line, and grounded through the connector terminal.

  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.

DESCRIPTION OF SYMBOLS 10,110 Shield electric wire 20 1st wiring member 22 Electric wire 124 Connector terminal 30 2nd wiring member 40 1st shield layer 50 2nd shield layer 60, 60B, 160, 160B Drain wire 62 Core wire 64 Covering 70 Ground terminal 90 Connection for earthing Line 140 First place shield layer 150 Second place shield layer

Claims (5)

At least one wiring member;
A plurality of shield layers covering the at least one wiring member at different locations;
A drain line disposed to pass through the plurality of shield layers and connected to each of the plurality of shield layers;
Shielded electric wire with The shielded electric wire according to claim 1,
The drain wire includes a core wire and a covering that covers the core wire except for at least a portion of the core wire that passes through the plurality of shield layers. The shielded electric wire according to claim 1 or 2,
The at least one wiring member includes a first wiring member and a second wiring member configured as a separate body from the first wiring member,
The plurality of shield layers include a first shield layer that covers the first wiring member and a second shield layer that covers the second wiring member,
The drain wire is a shielded electric wire arranged to pass through the first shield layer and the second shield layer and connected to the first shield layer and the second shield layer. The shielded electric wire according to claim 1 or 2,
The plurality of shield layers include a first place shield layer and a second place shield layer provided at different locations in the wiring path of the common wiring member,
The drain wire is disposed so as to pass through the first place shield layer and the second place shield layer, and is connected to the first place shield layer and the second place shield layer. The shielded electric wire according to any one of claims 1 to 4,
A shielded electric wire further comprising a connector terminal or a ground terminal connected to an end of the drain line.

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