JP2015149179A - Electromagnetic shielding member, and wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic shielding member which can easily ground the end of a shielding element wire as a housing when an insulated electric wire is adopted as the shielding element wire.SOLUTION: An electroconductive end holding member 3 has a metallic circular holding part 31 to which a plurality of coated shielding element wires 2 are welded in such a state that the ends of the coated shielding element wires are lined circularly. A core wire supporting part 41 and a concave part 42 adjacent to the core wire supporting part are formed in the metallic circular holding part 31. Core wires 21 of the coated shielding element wires 2 are welded to the core wire supporting part 41. The concave part 42 is formed deeper than the core wire supporting part 41. When the coated shielding element wire 2 is welded to the metallic circular holding part, the coated material eluted from the end of the coated shielding element wire 2 is made to flow in the concave part 42.

Description

  The present invention relates to an electromagnetic shield member that shields electromagnetic noise and a wire harness including the same.

  Conventionally, in a wire harness mounted on a vehicle such as an automobile, a tubular braided wire as shown in Patent Document 1 is often employed as a shield member that can be deformed in accordance with the deformation of an electric wire. The braided wire has a structure in which bare conductors are knitted into a cylindrical shape. The bare conductor is, for example, a plated copper wire. The shield member is formed in a cylindrical shape surrounding the periphery of the electric wire that is the target of the electromagnetic shield. Hereinafter, the electric wire to be subjected to electromagnetic shielding is referred to as a main electric wire.

  In general, when the main electric wire is wired from the opening of the metal casing into the casing, the cylindrical braided wire is covered with a cylindrical portion whose end protrudes from the opening in the metal casing. The ring is connected to the cylindrical part of the opening of the housing. In the caulking, the end of the braided wire is sandwiched and held between the tubular portion of the casing. As a result, the end of the braided wire is grounded to the housing.

  Moreover, in the example which patent document 1 shows, the edge part of a braided wire is connected to the metal shield shell member fixed to the edge of the opening in a housing | casing by caulking. The shield shell member is an independent member that can be attached to the casing and corresponds to a cylindrical portion that protrudes from the opening for introducing an electric wire in the metal casing.

  The shield shell member includes a cylindrical portion that covers the end of the braided wire and a fastening portion that is connected to the cylindrical portion and is fastened to the housing. In the shield shell shown in Patent Document 1, the cylindrical member is an example of a cylindrical portion, and the third flange portion is an example of a fastening portion.

JP 2006-344398 A

  By the way, in a shield member for a vehicle, it may be effective to employ an insulated wire (covered wire) as a shield wire instead of a bare conducting wire.

  For example, in order to achieve both the light weight of the shield member and the required specifications of the shield characteristics, the aluminum wire mainly composed of lightweight aluminum and the copper wire composed mainly of copper having excellent shielding characteristics are used as shield wires. Sometimes you want to mix. In this case, if at least the aluminum wire is covered, the different metal contact corrosion of the aluminum wire can be prevented.

  When an insulated wire is adopted as a shield wire, the insulation coating obstructs the housing grounding of the conductor (core wire) at the end of the insulated wire (shield wire). Moreover, it takes a lot of labor to strip off the insulating coating at the end of each insulated wire (shield wire) constituting the shield member.

  An object of this invention is to be able to earth | ground a housing | casing easily for the edge part of a shield strand, when an insulated wire is employ | adopted as a shield strand in a shield member.

  The electromagnetic shielding member according to the first aspect includes a plurality of covered shield strands and an end holding member. Each of the plurality of sheathed shield wires has a conductive core wire and an insulating coating formed on the outer peripheral surface of the core wire. That is, the sheathed shield wire is an insulated wire. The end holding member is a conductive member that is formed in an annular shape and has a metal annular holding portion that is welded in a state in which ends of the plurality of sheathed shield wires are arranged in an annular shape. A core wire support portion and a recess adjacent to the core wire support portion are formed in a portion where the end portions of each of the sheathed shield wires in the annular holding portion are welded. The said core wire support part is a part which contacts the said core wire of the said covering shield strand. The concave portion is a portion that is recessed from the core wire support portion and into which the insulating coating eluted from the end portion of the sheathed shield wire flows when the sheathed shield wire is welded.

  The electromagnetic shielding member which concerns on a 2nd aspect is an aspect of the electromagnetic shielding member which concerns on a 1st aspect. 2nd aspect WHEREIN: The said core wire support part of the said cyclic | annular holding | maintenance part contains the inclined surface which becomes deep gradually from the part on the opposite side with respect to the said recessed part side to the edge of the said recessed part.

  The electromagnetic shielding member which concerns on a 3rd aspect is an aspect of the electromagnetic shielding member which concerns on a 1st aspect or a 2nd aspect. In the third aspect, the end holding member includes a shield shell member and the annular holding portion. The shield shell member is a conductive member having an annular tube portion and a fastening portion that is connected to the tube portion and is fastened to another member. In this case, the annular holding portion is formed by bending-deformable metal belt-like members welded side by side at the ends of the core wires of the plurality of sheathed shield wires arranged in parallel, and the tube of the shield shell member. It has the structure connected to the outer peripheral surface of the part.

  The electromagnetic shielding member according to the fourth aspect is an aspect of the electromagnetic shielding member according to the first aspect or the second aspect. 4th aspect WHEREIN: The said edge part holding member is a metal shield shell member which has a cylinder part which comprises the said cyclic | annular holding part, and a fastening part connected with the cylinder part and fastened to another member.

  The electromagnetic shielding member which concerns on a 5th aspect is one aspect | mode of the electromagnetic shielding member which concerns on any one of a 1st aspect to a 4th aspect. The electromagnetic shielding member which concerns on a 5th aspect is further equipped with the flexible shield strand connection part. The shield wire connecting portions are adjacent to each other in a state where the intermediate portions between both end portions of each of the three or more coated shield strands arranged in parallel are held in the annular holding portion and arranged in an annular shape. The first shield shield wire and the second shield shield wire are connected to each other with an interval between them.

  The electromagnetic shielding member which concerns on a 6th aspect is an aspect of the electromagnetic shielding member which concerns on a 5th aspect. The electromagnetic shielding member which concerns on a 6th aspect is further provided with the shield strand binding member. The shield wire binding member is a member that gently binds the intermediate portion of the first sheathed shield wire and the intermediate portion of the second sheathed shield wire with a space therebetween.

  The wire harness which concerns on a 7th aspect is equipped with the main electric wire used as the object of electromagnetic shielding, and the electromagnetic shielding member which concerns on said each aspect formed surrounding the circumference | surroundings of the main electric wire. In this case, the end holding member in the electromagnetic shield member is formed in an annular shape surrounding a part of the main electric wire.

  In each of the above aspects, the covered shield strand is an insulated wire that functions as a shield strand. In addition, a core support portion that comes into contact with the core wire at the end of the sheathed shield wire and a recess into which the insulating coating eluted from the end of the sheathed shield wire flows are formed in the metal annular holding portion. The ends of each of the sheathed shield wires are heated in a state where the insulation coating is still formed at the positions of the core wire support portion and the recess. In this case, the heated insulating coating is eluted from the end of the coated shield wire into the recess. Therefore, it is possible to prevent poor welding due to the molten insulating coating remaining between the core wire and the core wire support portion at the end portion of the sheathed shield wire. As a result, the core wire of the sheathed shield wire is reliably bonded to the annular holding portion.

  Therefore, according to each of the above embodiments, the end of the sheathed shield wire can be easily joined to the annular holding portion without requiring a step of previously removing the insulation coating of the end of the sheathed shield wire, The end of the sheathed shield wire can be grounded easily.

  Moreover, according to the 2nd aspect, the insulation coating melt | dissolved in the edge part of a covering shield strand tends to flow in into a recessed part along an inclined surface. As a result, poor welding can be prevented more reliably.

  Moreover, according to the 3rd aspect, the edge part of the core wire in each covering shield strand can be welded with respect to the flat strip | belt-shaped member before connecting to a shield shell member. Therefore, the covering shield strand can be easily welded to the annular holding portion (strip member). In addition, the strip | belt-shaped member by which the edge part of the covering shield strand was welded is cyclically | annularly bent along the outer peripheral surface of the cylinder part of a shield shell member, and is connected to the cylinder part.

  Moreover, according to the 4th aspect, the edge part of each covering shield strand is directly welded with respect to the cylinder part (annular holding | maintenance part) of a shield shell member. In this case, since the member interposed between the covering shield wire and the cylindrical portion can be omitted, the number of components of the electromagnetic shielding member can be reduced.

  Further, in the fifth aspect, the plurality of covered shield strands are connected by a flexible shield strand connecting portion in a state of being arranged at intervals. Therefore, even when the electromagnetic shield member is bent and attached along the path of the main electric wire, the spacing between the sheathed shield wires is maintained substantially constant, and the plurality of sheathed shield wires are partially in the circumferential direction. It is almost uniformly distributed. As a result, it can be prevented that a large gap is partially formed between the covered shield strands and the shielding performance is deteriorated.

  Further, according to the fifth aspect, the plurality of covered shield strands are integrated in a comb shape by the flexible shield strand connecting portion. Therefore, it becomes easy to handle a plurality of coated shield strands when welding each coated shield strand to the annular holding portion.

  According to the sixth aspect, the shield wire binding member has a large gap formed between the first covered shield wire not connected by the shield wire connecting portion and the second covered shield wire adjacent thereto. It can also be prevented. Accordingly, it is possible to more reliably prevent the shielding performance from deteriorating.

It is a perspective view of the edge part of the wire harness 10 which concerns on embodiment. 2 is an exploded perspective view of a main part of the wire harness 10. FIG. It is sectional drawing of the edge part periphery vicinity of the covering shield strand in the electromagnetic shielding member with which the wire harness 10 is provided. It is a figure which shows the covering shield strand welding process in the middle of manufacturing the electromagnetic shielding member with which the wire harness 10 is provided. 3 is a plan view of a shield wire group included in an electromagnetic shield member according to a first application example applicable to the wire harness 10. FIG. It is a perspective view of the principal part of 10 A of wire harnesses which concern on a 1st application example. It is a perspective view of the principal part of the wire harness 10B which concerns on a 2nd application example. It is a perspective view of the principal part of the electromagnetic shielding member which concerns on the 3rd application example applicable to the wire harness. It is a figure which shows the covering shield strand welding process in the middle of manufacturing the electromagnetic shielding member which concerns on a 3rd application example. It is a perspective view of the principal part of the electromagnetic shielding member which concerns on the 4th application example applicable to the wire harness. It is sectional drawing of the welding part of the covering shield strand in the electromagnetic shielding member which concerns on the 5th application example applicable to the wire harness. It is sectional drawing of the welding part of the covering shield strand in the electromagnetic shielding member which concerns on the 6th application example applicable to the wire harness. 3 is a plan view of a shield wire group according to an application example applicable to the wire harness 10. FIG.

  Hereinafter, embodiments 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. An electromagnetic shield member and a wire harness including the electromagnetic shield member shown below are for vehicles such as automobiles.

<Wire harness>
First, the configuration of the wire harness 10 according to the embodiment will be described with reference to FIGS. As shown in FIGS. 1 and 2, the wire harness 10 includes a molded resin-attached electric wire 9 including a main electric wire 81 to be subjected to electromagnetic shielding, and an electromagnetic shielding member 1.

<Electric wire with molded resin>
The molded resin-attached electric wire 9 includes a terminal-attached electric wire 80 and a resin molded portion 7. The terminal-attached electric wire 80 has a main electric wire 81 and a terminal 82 connected to the end thereof. 1 and 2 show the structure of the molded resin-attached electric wire 9 in the vicinity of one end of the main electric wire 81. The molded resin-attached electric wire 9 has a structure shown in FIGS.

  The main electric wire 81 is an insulated electric wire having, for example, a core wire 811 that is a linear conductor and an insulating coating 812 formed on the outer peripheral surface thereof. In this case, at the end portion of the main electric wire 81, the end portion of the core wire 811 extends from the end of the insulating coating 812.

  The core wire 811 of the main electric wire 81 is a metal wire material whose main component is, for example, copper or aluminum. The insulation coating 812 of the main electric wire 81 is a coating of an insulating (non-conductive) synthetic resin whose main component is, for example, polyvinyl chloride or polyethylene.

  The terminal 82 is a metal fitting connected to the end of the core wire 811 in the main electric wire 81. For example, it is conceivable that the terminal 82 is connected to the end of the core wire 811 by welding, or the terminal 82 is crimped to the end of the core wire 811. The terminal 82 is, for example, a copper alloy member such as copper or brass, or a tin alloy in which tin (Sn) plating or tin (Ag), copper (Cu), bismuth (Bi) or the like is added to tin. This is a conductive member that has been plated.

  The resin mold portion 7 is a synthetic resin member molded so as to seal the entire portion of the core wire 811 of the main wire 81 extending from the insulating coating 812 and the portion of the terminal 82 that contacts the core wire 811. The resin mold portion 7 is formed by insert molding using the region from the end portion of the insulating coating 812 to a part of the terminal 82 in the electric wire with terminal 80 as an insert portion.

  The resin mold part 7 is a molded member of an insulating synthetic resin such as polypropylene, polyethylene, polyvinyl chloride, polybutylene terephthalate, or polyamide.

  In the present embodiment, the molded resin-attached electric wire 9 includes a plurality of electric wires with terminals 80, and the resin molded portion 7 collects the ends of the main electric wires 81 in the plural electric wires with terminals 80 in a state where they are arranged in parallel. And hold. It is also conceivable that the number of main wires 81 is one.

<Electromagnetic shield member>
The electromagnetic shield member 1 includes a plurality of covered shield strands 2 and an end holding member 3. FIG. 3 is a longitudinal sectional view around the end of the sheathed shield wire 2 in the electromagnetic shield member 1. 1 to 3 show the structure of the electromagnetic shield member 1 in the vicinity of one end of the plurality of sheathed shield wires 2. The electromagnetic shield member 1 has a structure shown in FIGS. 1 to 3 at both ends of the plurality of sheathed shield wires 2.

  As shown in FIG. 3, each of the sheathed shield wires 2 is an insulated wire having a conductive core wire 21 and an insulating coating 22 formed on the outer peripheral surface of the core wire 21. If a stranded wire in which a plurality of strands are twisted together is adopted as the core wire 21, the flexibility of the covered shield strand 2 can be enhanced. It is also conceivable that the core wire 21 is a single wire.

  For example, the sheathed shield wire 2 is an enameled wire having a linear conductor (core wire 21) and an insulating coating (enamel coating) formed by applying a resin paint on the surface of the conductor. When the covering shield wire 2 is an enameled wire, the insulating coating 22 is a coating of an insulating synthetic resin containing, for example, modified polyurethane, polyesterimide, polyamideimide or the like.

  It is also conceivable that the insulating coating 22 of the sheathed shield wire 2 is a coating formed by extrusion molding on the outside of the core wire 21. The insulating coating 22 in this case is a coating of an insulating synthetic resin whose main component is, for example, polyvinyl chloride or polyethylene.

  The core wire 21 of the sheathed shield wire 2 is a metal wire whose main component is, for example, copper or aluminum. Although it is conceivable that the core wires of all the sheathed shield wires 2 are wires of the same metal material, it is also conceivable that the electromagnetic shield member 1 includes a plurality of types of sheathed shield wires 2 each having a core wire 21 of a different material. .

  For example, in the electromagnetic shielding member 1, the sheathed shield wire 2 having the core wire 21 mainly composed of light aluminum and the sheathed shield wire 2 having the core wire 21 mainly composed of copper having excellent shielding characteristics are mixed. It is possible that The ratio of the multiple types of core wires 21 is determined in consideration of, for example, a balance between the weight reduction of the electromagnetic shielding member 1 and the shielding characteristics.

  The end holding member 3 is a conductive member formed in an annular shape. In the present embodiment, the end holding member 3 includes a metal annular holding portion 31 and a shield shell member 30. As shown in FIG. 1, the annular holding portion 31 is a metal member that is welded in a state where the end portions 20 of each of the plurality of sheathed shield wires 2 are arranged in an annular shape.

  As shown in FIGS. 1 and 2, the shield shell member 30 is a conductive member having an annular cylindrical portion 301 and a fastening portion 302 connected to the cylindrical portion 301. The fastening portion 302 is a portion that is fastened to a metal housing (not shown) that houses a device to which the molded resin-attached electric wire 9 is connected. The fastening portion 302 is formed outside the tubular portion 301.

  A through hole 300 forming a passage for the main electric wire 81 is formed in the cylindrical portion 301 of the shield shell member 30. The shield shell member 30 is attached to the casing in a state where the through hole 300 of the cylindrical portion 301 and the opening of the casing overlap.

  In the example shown in FIGS. 1 and 2, a screw hole 303 through which a screw for fastening the shield shell member 30 to the housing is passed is formed in the fastening portion 302. The shield shell member 30 is, for example, an aluminum member or a metal member such as iron whose surface is plated.

  In the present embodiment, the resin mold portion 7 of the electric wire 9 with mold resin is fitted into the through hole 300 of the cylindrical portion 301 in the shield shell member 30. As a result, the terminal-attached electric wire 80 penetrating the resin mold portion 7 enters the through-hole 300 of the cylindrical portion 301.

  As shown in FIG. 2, the annular holding portion 31 in the present embodiment has a structure in which a bendable metal strip-like member is connected to the outer peripheral surface of the cylindrical portion 301 in the shield shell member 30. The ends of the core wire 21 in each of the plurality of covered shield strands 2 are welded side by side to the metal belt-like member (annular holding portion 31).

  In the present embodiment, the end portions 20 of the respective covering shield strands 2 are welded to the metal strip member (annular holding portion 31) in a state where the plurality of covering shield strands 2 are arranged in parallel without crossing each other. . The belt-like member to which the end portion 20 of the sheathed shield wire 2 is welded is annularly bent along the outer peripheral surface of the cylindrical portion 301 of the shield shell member 30 and connected to the cylindrical portion 301.

  In the following description, a portion welded to the annular holding portion 31 at the end 20 of each of the sheathed shield wires 2 is referred to as a welded portion 200. Further, a portion where the end portions 20 of each of the sheathed shield wires 2 in the annular holding portion 31 are welded is referred to as a welded portion 4.

  For example, the band-shaped member (annular holding portion 31) is formed in an annular shape by connecting both ends in the longitudinal direction thereof by caulking. It is also conceivable that both ends of the belt-like member (annular holding portion 31) are connected by being folded. It is also conceivable that the band-like member (annular holding portion 31) is pressure-bonded by caulking with respect to the cylindrical portion 301.

  In the example shown in FIG. 1, the annular holding portion 31 is connected to the cylindrical portion 301 in a state where the welded portion 200 is sandwiched between the annular portion 301 and the cylindrical portion 301. Thereby, since the end portion 20 of the sheathed shield wire 2 is sandwiched between the cylindrical portion 301 and the annular holding portion 31, the sheathed shield wire 2 is not easily detached from the annular holding portion 31.

  Both ends of each of the plurality of covered shield strands 2 are held in an annular shape by the two end holding members 3. Therefore, the plurality of sheathed shield wires 2 are held by the two end holding members 3 in a state of being arranged in a cylindrical shape surrounding the main wire 81.

  FIG. 3 is a cross-sectional view of the periphery of the end portion 20 of the sheathed shield wire 2 in the electromagnetic shield member 1. As shown in FIG. 3, the welded portion 4 of the annular holding portion 31 is formed with a core wire support portion 41 and a recess 42 adjacent to the core wire support portion 41.

  The core wire support portion 41 is a portion that contacts the core wire 21 of the sheathed shield wire 2. The concave portion 42 is formed so as to be recessed from the core wire support portion 41. The recess 42 is a portion into which the insulating coating 22 eluted from the end portion 20 of the sheathed shield wire 2 flows when the sheathed shield wire 2 is welded.

  FIG. 4 is a diagram illustrating a covering shield strand welding process in the middle of manufacturing the electromagnetic shielding member 1. The welded portion 200 is formed by heating the end portion 20 with the insulating coating 22 formed on each of the sheathed shield wires 2 by the welding machine 90. A typical example of the welding machine 90 is an ultrasonic welding machine. In this case, the welding machine 90 includes an ultrasonic horn 901 pressed against the end 20 of the sheathed shield wire 2 and an end 20 of the sheathed shield wire 2. And an anvil 902 supported via the annular holding portion 31.

  The temperature of the end portion 20 of the sheathed shield wire 2 rises due to the ultrasonic vibration output from the ultrasonic horn 901. As a result, the insulating coating 22 is eluted at the end 20 of the sheathed shield wire 2, and the exposed core wire 21 is welded to the core wire support portion 41. A welded portion 200, which is a portion welded to the core wire support portion 41 in the core wire 21, is electrically connected to the annular holding portion 31.

  In the following description, the insulating coating 22 eluted from the end 20 of the sheathed shield wire 2 when the sheathed shield wire 2 is welded is referred to as an eluted coating 220. The elution coating 220 solidifies after flowing into the recess 42 of the welded portion 4. Therefore, the elution coating 220 is unlikely to remain between the core wire 21 and the core wire support portion 41.

  More specifically, the end portion 20 of each sheathed shield wire 2 is welded by the welder 90 in a state along the welded portion 4 of the annular holding portion 31. At that time, the insulation coating 22 in the portion facing the core wire support portion 41 and the recess 42 at the end 20 of each of the sheathed shield wires 2 melts and flows into the recess 42. Further, a portion of the core wire 21 that faces the core wire support portion 41 at the end portion 20 of each of the sheathed shield wires 2 is exposed by the elution of the insulating coating 22 and comes into contact with the core wire support portion 41. Further, the core wire 21 is welded to the core wire support portion 41.

  In the present embodiment, the core wire support portion 41 includes an inclined surface that gradually becomes deeper from a portion on the opposite side to the concave portion 42 side to the edge of the concave portion 42. In the example shown in FIGS. 3 and 4, the entire surface of the core wire support portion 41 forms an inclined surface. Therefore, the elution coating 220 tends to flow into the recess 42 along the inclined surface (the surface of the core wire support portion 41) from a position facing the core wire support portion 41.

<Effect>
In the electromagnetic shield member 1, each of the covered shield strands 2 is an insulated wire that functions as a shield strand. Further, the metal annular holding portion 31 is formed with a core wire support portion 41 that comes into contact with the core wire 21 of the end portion 20 of the sheathed shield wire 2 and a concave portion 42 into which the elution sheath 220 flows.

  The end portions 20 of each of the sheathed shield wires 2 are heated at the positions of the core wire support portions 41 and the recess portions 42 while the insulating coating 22 is still formed. In this case, the heated insulating coating 22 is eluted from the end portion 20 of the covering shield wire 2 into the recess 42. Therefore, it is possible to prevent poor welding due to the elution coating 220 remaining between the core wire 21 and the core wire support portion 41 at the end portion 20 of the sheathed shield wire 2. As a result, the core wire 21 of the sheathed shield wire 2 is reliably bonded to the annular holding portion 31.

  Therefore, if the electromagnetic shielding member 1 is employed, the end 20 of the sheathed shield wire 2 can be simply held in the annular holding portion 31 without a step of stripping the insulating coating 22 of the end 20 of the sheathed shield 2 in advance. Thus, the end 20 of the sheathed shield wire 2 can be grounded easily.

  If the electromagnetic shield member 1 is employed, the end of the core wire 21 in each of the sheathed shield wires 2 is welded to the flat belt-like member (annular holding portion 31) before being connected to the shield shell member 30. can do. Therefore, the covering shield strand 2 can be easily welded to the annular holding portion 31 (strip member).

<First application example>
Next, an electromagnetic shielding member 1A according to a first application example applicable to the wire harness 10 and a wire harness 10A according to a first application example including the same will be described with reference to FIGS. FIG. 5 is a plan view of the shield wire group 2X provided in the electromagnetic shield member 1A, and FIG. 6 is a perspective view of the wire harness 10A. 5 and 6, the same components as those shown in FIGS. 1 to 4 are given the same reference numerals. Hereinafter, differences from the wire harness 10 in the first application example will be described.

  The shield strand group 2X has a configuration in which a shield strand connecting portion 5 is added to the plurality of covered shield strands 2 shown in FIGS. In the following description, among the three or more coated shield strands 2, the one that is welded closest to the first end in the strip-shaped member (annular holding portion 31) is referred to as a first coated shield strand 201, and the strip-shaped member ( What is welded closest to the second end in the annular holding portion 31) is referred to as a second sheath shield wire 202, and all the remaining portions are referred to as a third sheath shield wire 203.

  The first covered shield strand 201 and the second covered shield strand 202 are the two covered shield strands 2 that are adjacent to each other in a state of being annularly arranged by being held by the annular holding portion 31.

  The shield strand connecting portion 5 is a flexible member. The shield wire connecting portion 5 has an intermediate portion between the two end portions 20 of each of the three or more sheathed shield wires 2 other than between the first sheathed shield wire 201 and the second sheathed shield wire 202. They are linked at intervals.

  That is, the shield wire connecting portion 5 connects the intermediate portions of all the third covered shield wire 203 in series with a space therebetween. Further, the shield wire connecting portion 5 connects the intermediate portion of the first covered shield wire 201 and the intermediate portion of at least one third covered shield wire 203 with an interval therebetween. Further, the shield wire connecting portion 5 connects the intermediate portion of the second covered shield wire 202 and the intermediate portion of at least one third covered shield wire 203 with a space therebetween.

  In the example shown in FIG. 5, the shield wire connecting portion 5 connects the adjacent shield shield wires 2 with an interval therebetween, but an example in which this is not the case is also conceivable. For example, it is conceivable that the shield wire connecting portion 5 connects two adjacent shield shield wires 2 together.

  The shield strand connecting portion 5 is a flexible synthetic resin member, for example. It is conceivable that the synthetic resin constituting the shield wire connecting portion 5 is, for example, an elastomer having elasticity, polyvinyl chloride, polyethylene, or the like.

  The shield strand connecting portion 5 is formed on the plurality of covered shield strands 2 before being welded to the annular holding portion 31. In other words, at a point before the end of the shield strand group 2X is welded to the annular holding portion 31, the plurality of covered shield strands 2 are integrated in a comb shape by the flexible shield strand connecting portion 5.

  Both ends of the interdigital shield wire group 2X are welded to the two annular holding portions 31 (band-like members) to form a welded portion 200. Further, as shown in FIG. 6, each of the two annular holding portions 31 is bent into an annular shape. In the example shown in FIG. 6, both end portions of the belt-like member (annular holding portion 31) form a connecting portion 310 that is connected by being folded. Thereby, the electromagnetic shielding member 1A is formed. In FIG. 6, drawing of the shield shell member 30 is omitted.

  Even when the electromagnetic shield member 1A including the shield wire group 2X is bent and attached along the path of the main electric wire 81, the distance between the shield shield wire 2 is maintained substantially constant, and a plurality of sheaths The shield strands 2 are distributed substantially uniformly without being partially biased in the circumferential direction. As a result, it can be prevented that a large gap is partially formed between the covered shield strands 2 and the shielding performance is deteriorated.

  Furthermore, since the plurality of sheathed shield wires 2 are integrated in a comb shape, handling of the plurality of sheathed shield strands 2 when welding each sheathed shield strand 2 to the annular holding portion 31 is facilitated.

<Second application example>
Next, an electromagnetic shielding member 1B according to a second application example applicable to the wire harness 10 will be described with reference to FIG. FIG. 7 is a perspective view of the wire harness 10B. 7, the same components as those shown in FIGS. 1 to 6 are given the same reference numerals. Note that the drawing of the shield shell member 30 is also omitted in FIG.

  The electromagnetic shielding member 1B is an application example of the electromagnetic shielding member 1A. Hereinafter, differences from the wire harness 10A in the electromagnetic shield member 1B will be described.

  The electromagnetic shielding member 1B includes a shield wire binding member 6 in addition to the configuration of the electromagnetic shielding member 1A. The shield wire binding member 6 is a member that gently binds the intermediate portion of the first sheathed shield wire 201 and the intermediate portion of the second sheathed shield wire 202 at an interval.

  For example, the shield strand binding member 6 is a string-like member that is gently wound spirally around the intermediate portion of the first covered shield strand 201 and the intermediate portion of the second covered shield strand 202. In the example shown in FIG. 7, the end portion 60 of the string-like shield wire binding member 6 is fixed to the annular holding portion 31 with an adhesive or the like.

  Moreover, if the electromagnetic shielding member 1B is adopted, the shield strand binding member 6 includes a first sheath shield strand 201 that is not coupled by the shield strand coupling portion 5 and a second sheath shield strand 202 adjacent thereto. It is possible to prevent a large gap from being formed. Accordingly, it is possible to more reliably prevent the shielding performance from deteriorating.

<Third application example>
Next, an electromagnetic shield member 1C according to a third application example applicable to the wire harness 10 will be described with reference to FIGS. FIG. 8 is a perspective view of the main part of the electromagnetic shielding member 1C. FIG. 9 is a diagram illustrating a covering shield strand welding process in the middle of manufacturing the electromagnetic shielding member 1C. 8 and 9, the same components as those shown in FIGS. 1 to 7 are given the same reference numerals. Hereinafter, the difference between the electromagnetic shielding member 1C and the electromagnetic shielding member 1 will be described.

  In the electromagnetic shield member 1 </ b> C, the metal shield shell member 30 itself having the cylindrical portion 301 and the fastening portion 302 connected to the cylindrical portion 301 constitutes the end holding member 3.

  That is, in the electromagnetic shield member 1 </ b> C, the end portion 20 of each of the covered shield strands 2 is directly welded to the cylindrical portion 301 of the shield shell member 30. In the example shown in FIG. 8, the end 20 of each of the sheathed shield wires 2 is welded to the outer peripheral surface of the cylindrical portion 301.

  And the to-be-welded part 4 which has the core wire support part 41 and the recessed part 42 is formed in the outer peripheral surface of the cylinder part 301 of the shield shell member 30. As shown in FIG. Therefore, the elution coating 220 flows into the recess 42 formed on the outer peripheral surface of the cylindrical portion 301.

  FIG. 9 shows a state in which the end portion 20 of the sheathed shield wire 2 is welded to the welded portion 4 of the cylindrical portion 301 of the shield shell member 30. In the example shown in FIG. 9, the ultrasonic horn 901 of the welding machine 90 is pressed against the end 20 of the sheathed shield wire 2 along the welded portion 4 of the cylindrical portion 301. Further, the anvil 902 of the welding machine 90 supports the end portion 20 of the sheathed shield wire 2 via the cylindrical portion 301.

  In the example shown in FIG. 9, the anvil 902 of the welding machine 90 is formed to be cantilevered so as to be inserted into the through hole 300 of the cylindrical portion 301.

  If the electromagnetic shield member 1C is employed, a member interposed between the sheathed shield wire 2 and the cylindrical portion 301 of the shield shell member 30 can be omitted, so that the number of components of the electromagnetic shield member 1C is reduced. be able to.

<Fourth application example>
Next, an electromagnetic shielding member 1D according to a fourth application example applicable to the wire harness 10 will be described with reference to FIG. FIG. 10 is a perspective view of the main part of the electromagnetic shielding member 1D. 10, the same components as those shown in FIGS. 1 to 8 are given the same reference numerals.

  The electromagnetic shielding member 1D is an application example of the electromagnetic shielding member 1C. Hereinafter, a difference between the electromagnetic shielding member 1D and the electromagnetic shielding member 1 will be described.

  In the electromagnetic shield member 1 </ b> D, the plurality of covered shield strands 2 have a structure knitted in a cylindrical shape in the same manner as a general braided wire.

  And also in electromagnetic shielding member 1D, the edge part 20 of each covering shield strand 2 is directly welded with respect to the cylinder part 301 of the shield shell member 30. FIG. In the example shown in FIG. 10, the end 20 of each of the sheathed shield wires 2 is welded to the welded portion 4 formed on the outer peripheral surface of the cylindrical portion 301.

  Even when the electromagnetic shield member 1 </ b> D is employed, a member interposed between the sheathed shield wire 2 and the cylindrical portion 301 of the shield shell member 30 can be omitted. Moreover, the shield strand connecting part 5 and the shield strand binding member 6 can be omitted. Therefore, the number of components of the electromagnetic shield member 1D can be reduced.

<Fifth application example>
Next, with reference to FIG. 11, a welding structure of the sheathed shield wire 2 in the electromagnetic shield member 1E according to the fifth application example applicable to the wire harness 10 will be described. FIG. 11 is a cross-sectional view of a welded portion of the sheathed shield wire 2 in the electromagnetic shield member 1E. In FIG. 11, the same components as those shown in FIGS. 1 to 10 are given the same reference numerals. Hereinafter, the difference between the electromagnetic shielding member 1E and the electromagnetic shielding member 1 will be described.

  A welded portion 4A that plays the same role as the welded portion 4 is also formed in the annular holding portion 31 of the electromagnetic shield member 1E. The welded portion 4A is a portion where a core wire support portion 41 that contacts the core wire 21 of the end portion 20 of the sheathed shield wire 2 and a recess 42A adjacent to the core wire support portion 41 are formed.

  In the welded portion 4 </ b> A, the recess 42 </ b> A is formed so as to be recessed from the core wire support portion 41. However, the concave portion 42 </ b> A in this application example is a hole that penetrates the annular holding portion 31. In this case, at the time of welding of the sheathed shield wire 2, a part or all of the elution coating 220 that has flowed into the recess 42A passes through the recess 42A (through hole). FIG. 11 shows a state in which a part of the elution coating 220 remains in the recess 42A.

  Even when the electromagnetic shield member 1E having the welded portion 4A as shown in FIG. 11 is employed, the same effect as that obtained when the electromagnetic shield member 1 is employed can be obtained.

<Sixth application example>
Next, with reference to FIG. 12, a welding structure of the covered shield element wire 2 in the electromagnetic shield member 1F according to the sixth application example applicable to the wire harness 10 will be described. FIG. 12 is a cross-sectional view of a welded portion of the sheathed shield wire 2 in the electromagnetic shield member 1F. In FIG. 12, the same components as those shown in FIGS. 1 to 11 are given the same reference numerals. Hereinafter, the difference between the electromagnetic shielding member 1F and the electromagnetic shielding member 1 will be described.

  A welded portion 4B that plays the same role as the welded portion 4 is also formed in the annular holding portion 31 of the electromagnetic shield member 1F. The welded portion 4B is a portion where a core wire support portion 41B that comes into contact with the core wire 21 of the end portion 20 of the sheathed shield wire 2 and a concave portion 42B adjacent thereto are formed.

  In the welded portion 4B, the pair of core wire support portions 41B are convex portions formed so as to protrude from their surrounding portions. The welded portion 200 of the sheathed shield wire 2 is welded to the top of the pair of convex core wire support portions 41B. On the other hand, the concave portion 42B is a portion between the pair of core wire support portions 41B. Since the pair of core wire support portions 41B protrudes, the concave portion 42B between them is formed to be relatively depressed.

  Even when the electromagnetic shield member 1F having the welded portion 4B as shown in FIG. 12 is employed, the same effect as that obtained when the electromagnetic shield member 1 is employed can be obtained.

<Application examples of shield wire group>
Next, a shield wire group 2Y according to an application example applicable to the wire harness 10 will be described with reference to FIG. FIG. 13 is a plan view of the shield strand group 2Y. In FIG. 13, the same components as those shown in FIGS. 1 to 9 are given the same reference numerals. Hereinafter, the points of the shield strand group 2Y different from the shield strand group 2X will be described.

  Similarly to the shield strand group 2X, the shield strand group 2Y has a structure in which a plurality of covered shield strands 2 are connected in a comb shape by the shield strand connecting portions 5A.

  The shield wire connecting portion 5 </ b> A is a flexible string-like member and performs the same function as the shield wire connecting portion 5. The shield wire connecting portion 5A has an intermediate portion between the two end portions 20 of each of the three or more sheathed shield wires 2 other than between the first sheathed shield wire 201 and the second sheathed shield wire 202. They are linked at intervals.

  In the example shown in FIG. 13, the shield wire connecting portion 5 </ b> A has a plurality of tie portions 52 tied to the intermediate portion of each of the covered shield strands 2, and a string-like base portion 51 that connects the tie portions 52. . It is also conceivable that a shield wire group 2Y having a structure in which a plurality of covered shield wire 2 are connected by such a shield wire connecting portion 5A is employed instead of the shield wire group 2X.

<Other application examples>
In the electromagnetic shielding members 1, 1 </ b> A, 1 </ b> B, 1 </ b> C, 1 </ b> D, 1 </ b> E, 1 </ b> F, it is also conceivable that the shield wire welded to the annular holding portion 31 includes a plurality of covered shield wires 2 and a plurality of bare wires. . In this case, each bare wire employed as the shield wire is a wire of the same type of metal.

  In addition, the electromagnetic shielding member and the wire harness according to the present invention can be freely combined with the above-described embodiment and each application example within the scope of the invention described in each claim, or the embodiment and each application example. It is also possible to configure by appropriately modifying or omitting part of the above.

1, 1A, 1B, 1C, 1D, 1E, 1F Electromagnetic shield member 10, 10A, 10B Wire harness 2 Coated shield strand 20 End of shield shield strand 200 Welded portion 201 First sheath shield strand 202 Second sheath Shield wire 203 Third sheath shield wire 21 Core wire of sheath shield wire 22 Insulation coating of sheath shield wire 220 Elution coating 2X, 2Y Shield wire group 3 End holding member 30 Shield shell member 300 Penetration of shield shell member Hole 301 Cylindrical portion 302 Fastening portion 303 Screw hole 31 Ring holding portion 310 Ring holding portion connection portion 4, 4A, 4B Welded portion 41, 41B Core wire support portion 42, 42A, 42B Concavity 5, 5A Shield wire connection portion 51 String-shaped base 52 Knotted portion 6 Shield strand binding member 60 End of shield strand connecting member 7 Tree Mold portion 80 insulating coating of the core wire 812 main wire terminal attached wire 81 main wire 811 main wire 82 Terminal 9 molding resin attached wire 90 Welder 901 ultrasonic horn 902 anvil

Claims (7)

A plurality of sheathed shield wires each having a conductive core wire and an insulating coating formed on the outer peripheral surface of the core wire;
An end holding member that is formed in an annular shape and has a metal annular holding portion that is welded in a state in which ends of each of the plurality of covered shield strands are arranged in an annular shape,
In the portion where the ends of each of the sheathed shield wires in the annular holding portion are welded,
A core wire support portion in contact with the core wire of the sheathed shield wire;
A recess formed adjacent to the core wire support portion and recessed from the core wire support portion and into which the insulating coating eluted from the end of the sheath shield wire flows when the sheath shield wire is welded; Electromagnetic shield member.   2. The electromagnetic shield member according to claim 1, wherein the core wire support portion of the annular holding portion includes an inclined surface that gradually becomes deeper from a portion on the opposite side to the concave portion side to an edge of the concave portion. The end holding member is
A conductive shield shell member having an annular tubular portion and a fastening portion connected to the tubular portion and fastened to another member;
A structure in which a bending-deformable metal belt-like member, in which end portions of the core wires of each of the plurality of sheathed shield wires arranged in parallel are welded side by side, is connected to the outer peripheral surface of the cylindrical portion of the shield shell member. The electromagnetic shield member according to claim 1, comprising the annular holding portion having   The said end holding member is a metal shield shell member having a cylindrical portion that forms the annular holding portion and a fastening portion that is connected to the cylindrical portion and is fastened to another member. Electromagnetic shielding member.   First intermediate shield shield wires adjacent to each other in a state of being arranged in an annular shape by holding intermediate portions between both end portions of each of three or more of the shield shield wires arranged in parallel in the annular holding portion. The electromagnetic shield member according to any one of claims 1 to 4, further comprising a flexible shield wire connecting portion that connects with a space other than between the shielded shield wires.   The electromagnetic shield according to claim 5, further comprising a shield wire binding member that gently binds the intermediate portion of the first sheathed shield wire and the intermediate portion of the second sheathed shield wire with a space therebetween. Element. A main electric wire subject to electromagnetic shielding;
An electromagnetic shielding member formed around the main wire, and
The electromagnetic shielding member is
A plurality of sheathed shield wires each having a conductive core wire and an insulating coating formed on the outer peripheral surface of the core wire;
A pair of conductive ends having a metal annular holding portion formed in an annular shape surrounding a part of the main electric wire and welded in a state where both end portions of each of the plurality of sheathed shield wires are arranged in an annular shape A holding member,
In the portion where the end of the sheathed shield wire in the annular holding part is welded,
A core wire support portion in contact with the core wire of the sheathed shield wire;
A recess formed adjacent to the core wire support portion and recessed from the core wire support portion and into which the insulating coating eluted from the end of the sheath shield wire flows when the sheath shield wire is welded; Wire harness.

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