JP2018199393A - Wiring harness - Google Patents

Abstract

To provide a wiring harness which can reduce the cost of a structure in an outdoor side and achieve water proof in an indoor side.SOLUTION: A wiring harness 10 includes, in a wiring route in which an electric wire 20 is arranged, an outdoor section 12 arranged in the outdoor, and an indoor section 13 arranged in the indoor. An exterior member 40 surrounding an outer circumference of the electric wire 20 is provided across the outdoor section 12 and the indoor section 13. In the indoor section 13, a seal part 50 which seals between the electric wire 20 and an end portion of the exterior member 40 is provided.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wire harness.

  In Patent Document 1, in a hybrid vehicle or an electric vehicle, a front-side wire harness routed in the front compartment of the vehicle, a rear-side wire harness routed in the rear compartment of the vehicle, and a route under the vehicle floor A wire harness that is divided into a common under-floor wire harness is disclosed. The underfloor common wire harness has a shield pipe through which three electric wires are inserted.

JP 2012-56368 A

  By the way, in the underfloor common wire harness, a corrugated tube that can be opened and closed via a split groove may be used instead of the shield pipe. According to this, since each electric wire can be put horizontally into the open corrugated tube, the insertion operation of each electric wire can be easily performed. However, if the corrugated tube is disposed outside the room, water may infiltrate through the split groove, and the infiltrated water may travel through the electric wires to reach the vehicle interior (front side wire harness, rear side wire harness). . On the other hand, it is possible to extrapolate rubber boots over the entire length from the outdoor side to the indoor side of the wire harness to achieve waterproofing. However, for example, it is necessary to use rubber boots with good heat resistance in an engine room having a high ambient temperature, and therefore there are circumstances in which usable materials are limited and costs are high.

  The present invention has been completed based on the above circumstances, and an object of the present invention is to provide a wire harness capable of waterproofing the indoor side while reducing the cost of the outdoor structure. .

  The wire harness of the present invention includes an outdoor region disposed outside the room and an indoor region disposed indoors in the routing route through which the electric wire is routed, and spans the outdoor region and the indoor region. The exterior member which surrounds the outer periphery of the said electric wire is provided, The seal | sticker part which seals between the said electric wire and the edge part of the said exterior member is provided in the said indoor area | region, It has the characteristics.

  Since the seal part which seals between the electric wire and the edge part of an exterior member is provided in the indoor area | region of the wire harness, even if an outdoor area | region is flooded, the indoor area | region can be waterproofed. Moreover, since it is not necessary to install a special waterproof structure in the outdoor area, the cost of the outdoor area structure can be reduced.

In Example 1 of this invention, it is sectional drawing which shows the seal part of the indoor area | region of a wire harness. FIG. 2 is a partially enlarged view of FIG. 1. It is a partially omitted general view of the wire harness. In Example 2 of this invention, it is sectional drawing which shows the seal part of the indoor area | region of a wire harness. In another Example of this invention, it is sectional drawing which shows the seal part of the indoor area | region of a wire harness.

Preferred embodiments of the present invention are shown below.
A flexible shield member that covers and shields the electric wire is disposed inside the outer member, and the seal portion projects in a radial direction from the electric wire side, and the shield member and the outer member are arranged radially outward. It is good to have the holder which has the accommodation recessed part in which an edge part is accommodated, and the sealing material enclosed in the said accommodation recessed part. Even if there is a situation where it is difficult to achieve waterproofing with a rubber plug or the like because the shield member is flexible, according to this configuration, the shield member is housed in the housing recessed portion together with the end portion of the exterior member, Since the sealing material is sealed in the housing recess, waterproofing between the shield member and the exterior member can be achieved.

  The holder may be made of synthetic resin, the periphery of the electric wire may be covered with a sealing member, and a space between the sealing member and the holder may be sealed in a liquid-tight manner. According to this, the moldability of the housing recess is improved by the synthetic resin holder, and the sealing performance around the electric wire is ensured by the sealing member.

  It is preferable that the holder has an insertion hole in the radial direction, and the sealing member is a rubber plug and is inserted into the insertion hole in a liquid-tight manner. According to this, waterproofing between an electric wire and a holder can be aimed at easily using a rubber stopper. Further, it is not necessary to integrally mold the holder and the rubber plug with a large apparatus.

  The holder may be formed of an integral rubber plug that covers the periphery of the electric wire. According to this, it is possible to avoid an increase in the number of parts.

  The shield member may be folded back from the inner surface side of the exterior member to the outer surface side, and the folded portion may be housed in the housing recess. According to this, the integrity of the exterior member and the shield member can be improved, and a large waterproof range of the shield member can be secured.

<Example 1>
A first embodiment of the present invention will be described with reference to FIGS. The wire harness 10 of the first embodiment includes a plurality of (two in the illustrated case) electric wires 20 arranged between a battery and an inverter or between an inverter and a motor in a vehicle such as a hybrid vehicle or an electric vehicle. It has. Specifically, the wire harness 10 is routed for a long time in a range extending from a room (engine room) in the front part of the vehicle to a room in the rear part of the vehicle through a portion along the vehicle floor. Briefly, as shown in FIG. 3, the wire harness 10 is sequentially divided into an indoor region 11 at the front of the vehicle, an outdoor region 12 below the vehicle floor, and an indoor region 13 at the rear of the vehicle. In the following description, the indoor area refers to the indoor area 13 at the rear of the vehicle that is not on the engine room side unless otherwise specified.

  Although not shown, each electric wire 20 has a plurality of conductive core wires and an insulating resin coating that covers each core wire. Each electric wire 20 is a non-shielded electric wire having no shield structure.

  The wire harness 10 has a shield member 30 that collectively covers the electric wires 20. The shield member 30 is a cylindrical braided member having conductivity and flexibility (softness), and is formed by braiding a plurality of metal strands. The shield member 30 of the first embodiment is provided over substantially the entire length excluding both ends of the wire harness 10.

  As shown in FIG. 3, connectors 80 and 90 corresponding to the indoor region 11 at the front of the vehicle and the indoor region 13 at the rear of the vehicle are provided at both ends of the wire harness 10. Both ends of each electric wire 20 are introduced into connectors 80 and 90 via corresponding terminal fittings 81 and 91. Further, both end portions of the shield member 30 are shield-connected to shield shells 82 and 92 provided on the connectors 80 and 90.

  The wire harness 10 includes an exterior member 40 that surrounds the outer periphery of each electric wire 20 in the outdoor region 12. In the case of the present Example 1, the exterior member 40 is a resin-made bellows-shaped corrugated tube, has flexibility, and can be bent according to the bending position of the routing path. The exterior member 40 is provided over substantially the entire region of the vehicle floor under floor portion of the outdoor region 12 and is provided from the outdoor region 12 to the middle of the indoor region 13. As shown in FIG. 1, the shield member 30 is disposed along the inner surface of the exterior member 40.

  The exterior member 40 has a split groove 41 along the length direction, and can be opened and closed via the split groove 41. Each electric wire 20 and the shield member 30 are laterally put in the exterior member 40 in the open state, and then the entire circumference is covered by the exterior member 40 in the closed state. Therefore, it is not necessary to perform the operation of inserting each electric wire 20 and the shield member 30 from one end of the exterior member 40 to the other end, and good workability can be ensured. The exterior member 40 can be maintained in a closed state by tape winding or the like.

  A partition wall 70 (panel) that partitions the indoor region 13 and the outdoor region 12 of the wire harness 10 is provided in the vehicle. The partition wall 70 is provided with a through hole 71 opening in a circular shape, and the wire harness 10 is drawn from the outdoor region 12 into the indoor region 13 through the through hole 71.

  A rubber grommet 75 such as silicon rubber is fitted into the through hole 71 of the partition wall 70. The grommet 75 includes a cylindrical insertion portion 76 that allows the exterior member 40 to be inserted in the length direction, and a flange portion 77 that projects from the insertion portion 76 in the radial direction (a direction orthogonal to the length direction of the wire harness 10). doing. A fitting groove 78 is formed in the outer peripheral end surface of the flange portion 77 over the entire circumference. The grommet 75 is held by the partition wall 70 by elastically locking the fitting groove 78 of the flange portion 77 to the hole edge portion of the through hole 71 of the partition wall 70. Further, the exterior member 40 is held by the partition wall 70 via the grommet 75 by tape winding or the like across the insertion portion 76 and the exterior member 40.

  By the way, as described above, when the exterior member 40 has a structure having the split groove 41, water may enter the inside through the split groove 41. If the outdoor region 12 is submerged, the water may travel along the electric wires 20 and the shield member 30 and also the indoor region 13, and the electrical connection portions of the connectors 80 and 90 may also submerge.

  However, in the first embodiment, a seal portion 50 that blocks water that has entered the outdoor region 12 is provided in the indoor region 13 in the vicinity of the partition wall 70, and an electrical connection portion of the indoor region 13 by the seal portion 50. It is possible to prevent water from being flooded. Hereinafter, the structure of the seal portion 50 will be specifically described.

  The seal portion 50 includes a holder 51 made of a synthetic resin, a sealing material 52 made of a photo-curing (for example, ultraviolet curable) or thermosetting resin, and a rubber plug 53 made of rubber such as silicon rubber. Configured.

  As shown in FIG. 2, the holder 51 includes a disk-shaped base 54 along the radial direction, and a cylinder protruding from the position near the radial inner end of the base 54 to one side in the length direction (outdoor region 12 side). And an outer cylinder portion 56 that protrudes from the radially outer end position of the base portion 54 to one side in the length direction and is disposed substantially parallel to the inner cylinder portion 55. The front end of the inner cylinder part 55 in the protruding direction is disposed at a position protruding forward from the front end of the outer cylinder part 56 in the protruding direction.

  An accommodation recess 57 is defined by the base 54, the inner cylinder part 55, and the outer cylinder part 56 outside the base part 54 in the radial direction. As will be described later, the shield member 30 is inserted into the housing recess 57 together with the end of the exterior member 40, and the sealing material 52 is charged and solidified.

  The inner end portion in the radial direction of the base portion 54 and the inner cylinder portion 55 are arranged apart from each electric wire 20. An insertion hole 64 defined by a radially inner end portion of the base portion 54 and an inner surface of the inner cylinder portion 55 is provided at the center portion of the holder 51. The insertion hole 64 of the holder 51 is closed by the rubber plug 53. A radially inner end portion of the base portion 54 is formed as an annular rib-shaped engaging portion 58 that extends substantially perpendicular to the inner cylinder portion 55 and protrudes radially inward (on the insertion hole 64 side).

  The rubber plug 53 is a collective type having a plurality of seal holes 59 through which the electric wires 20 can be inserted in a liquid-tight manner, and as shown in FIG. And a plug portion 62 disposed in close contact with each other in the radial direction along the back surface of the base portion 54 (a flat surface opposite to the side from which the inner tube portion 55 and the outer tube portion 56 protrude). have. Between the trunk portion 61 and the plug portion 62, there is provided an annular groove-shaped locking receiving portion 63 that drops one step from the outer surface of the barrel portion 61 and continues to the end surface of the plug portion 62 without a step.

  Next, a method for assembling the seal portion 50 on the indoor region 13 side will be described. At the time of assembly, the shield member 30 is folded back in a substantially U shape so as to wrap around the end of the exterior member 40 from the inner surface side to the outer surface side of the exterior member 40 in the indoor region 13. A folded portion 32 is formed (see FIG. 2). The folded portion 32 is housed in the housing recess 57 of the holder 51 and is disposed along the inner surface of the housing recess 57. Further, the portion of the shield member 30 that extends from the folded portion 32 to the front is folded in a substantially U shape in the opposite direction from the end of the outer tube portion 56 to the outer surface side, and the outer periphery of the seal portion 50 is After enclosing, it arrange | positions so that each electric wire 20 may be covered collectively. The folded portion 32 can be bent as the end portion of the exterior member 30 is inserted into the housing recess 57 of the holder 51.

  Next, the sealing material 52 is put into the accommodating recess 57. At this time, the sealing material 52 flows and enters the mesh of the folded portion 32 and is filled so as to spread between the folded portion 32 and the exterior member 40 and between the folded portion 32 and the housing recess 57. At this time, since the exterior member 40 is a corrugated tube having a concavo-convex shape, the sealing material 52 is also introduced into the recess 46 of the exterior member 40.

Thereafter, when the sealing material 52 is cured (solidified), the shield member 30 is sealed in a liquid-tight manner together with the end portion of the exterior member 40 in the housing recess 57.
Further, the rubber plug 53 is inserted into the insertion hole 64 of the holder 51 and attached at an appropriate timing. The body portion 61 is fitted in the inner cylinder portion 55 in a liquid-tight manner, and the locking portion 58 of the holder 51 is elastically fitted to the locking receiving portion 63 of the rubber plug 53, so that the rubber plug 53 is held in the holder 51. Is positioned and locked. Thereby, between each electric wire 20 and the holder 51 is obstruct | occluded liquid-tightly.

  As described above, according to the first embodiment, in the seal portion 50 in the indoor region 13 of the wire harness 10, the end portion of the exterior member 40 and the space between the shield member 30 and the holder 51 are sealed with the sealing material 52. At the same time, the gap between the holder 51 and each electric wire 20 is sealed with a rubber plug 53. For this reason, even if water enters the inside through the split groove 41 of the exterior member 40 and the like in the outdoor region 12, and the water tries to move to the indoor region 13, the water is blocked by the seal unit 50. Further, it is possible to prevent the previous connectors 80, 90, etc. from being submerged. Therefore, the indoor region 13 can be waterproofed without providing a special waterproof structure such as attaching rubber boots to the outdoor region 12.

  Moreover, the flexible shield member 30 which covers and shields each electric wire 20 is arrange | positioned inside the exterior member 40, each seal | sticker part 50 protrudes from the electric wire 20 side to radial direction, and shield member is radially outside. 30 and the holder 51 having the housing recess 57 in which the end portions of the exterior member 40 are housed, and the sealing member 52 sealed in the housing recess 57, the shield member 30 is flexible. Even under such circumstances, waterproofing can be achieved.

  The holder 51 is made of synthetic resin, has a plurality of insertion holes 64 in the radial direction, and a rubber plug into which the seal portion 50 is inserted in a liquid-tight manner between the hole surface of each insertion hole 64 and the electric wire 20. Since it has 53, waterproofing between the electric wire 20 and the holder 51 can be easily achieved using the rubber plug 53.

  Furthermore, since the shield member 30 is folded back from the inner surface side to the outer surface side of the exterior member 40 and the folded portion 32 is accommodated in the accommodating recess 57, the integrity of the exterior member 40 and the shield member 30 is improved, and the shield member A large waterproof range of 30 can be secured.

<Example 2>
FIG. 4 shows a second embodiment of the present invention. The second embodiment is different from the first embodiment in the structure of the exterior member 40A. Others are substantially the same as those in the first embodiment, and the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  In the case of the second embodiment, the exterior member 40 </ b> A includes a bellows-like corrugated tube 43 similar to that of the first embodiment and a synthetic resin or metal pipe 44. The corrugated tube 43 is disposed in the outdoor region 12 and is not provided in the indoor region 13. The pipe 44 has a circular tube shape, and is disposed across the indoor region 13 from the outdoor region 12 while penetrating the through hole 71 of the partition wall 70. Specifically, the pipe 44 has an inner surface and an outer surface with no irregularities, and the outer surface is disposed along the inner surface of the insertion portion 76 of the grommet 75 fitted in the through hole 71 of the partition wall 70. Further, the pipe 44 is juxtaposed adjacent to the corrugated tube 43, and is also taped together with the insertion portion 76 and fixed to the corrugated tube 43.

  The folded portion 32 of the shield member 30 is disposed along the inner surface and the outer surface of the pipe 44 while wrapping around the end portion of the pipe 44, and is housed in the housing recess 57 of the holder 51 together with the end portion of the pipe 44. When the sealing material 52 is charged into the housing recess 57 and solidified, the folded portion 32 is sealed together with the end of the pipe 44.

  In the case of the second embodiment, since the folded portion 32 of the shield member 30 is disposed along the flat inner surface and outer surface at the end of the pipe 44, a gap is hardly generated between the shield member 30 and the exterior member 40A. The integrity of the member 30 and the exterior member 40A is improved. As a result, the sealing property of the shield member 30 can be maintained better.

<Other embodiments>
Other embodiments will be briefly described below.
(1) The present invention can also be applied to a non-shielded wire harness that does not have a shield member.
(2) The exterior member may be a corrugated tube that does not have a split groove and whose entire circumference is closed.
(3) The exterior member may be a pipe made entirely of a metal tube or a composite tube of metal and resin.
(4) A seal portion may be provided in the indoor area on the engine room side.
(5) As shown in FIG. 5, the holder 51 </ b> A may be formed of a rubber material such as silicon rubber and may be integrated with a rubber stopper that liquid-tightly covers the periphery of the electric wire. According to this, the holder 51A and the rubber plug need not be separate parts, and the number of parts can be reduced.
(6) The periphery of the electric wire only needs to be covered with a sealing member, and the sealing member is not limited to the rubber plug. For example, the sealing member may be made of a thermosetting or ultraviolet curable material (elastomer, resin, etc.).
(7) The sealing member covering the periphery of the electric wire and the synthetic resin holder may be integrally formed liquid-tight by two-color molding or insert molding.

DESCRIPTION OF SYMBOLS 10 ... Wire harness 12 ... Outdoor area 13 ... Indoor area (at rear part of vehicle) 20 ... Electric wire 30 ... Shield member 40, 40A ... Exterior member 50 ... Seal part 51, 51A ... Holder 52 ... Sealing material 53 ... Holder 64 ... Insertion Hole

Claims (6)

The routing route in which the electric wires are routed includes an outdoor area arranged outside the room and an indoor area arranged indoors,
An exterior member surrounding the outer periphery of the electric wire is provided across the outdoor region and the indoor region,
The wire harness characterized by the seal | sticker part which seals between the said electric wire and the edge part of the said exterior member being provided in the said indoor area | region. A flexible shield member that covers and shields the electric wire is disposed inside the exterior member,
The seal portion projects in a radial direction from the electric wire side, and includes a holder having an accommodation recess in which the end of the shield member and the exterior member is accommodated outside in the radial direction, and a sealing material sealed in the accommodation recess The wire harness according to claim 1, comprising:   The wire according to claim 2, wherein the holder is made of a synthetic resin, a periphery of the electric wire is covered with a sealing member, and a space between the sealing member and the holder is liquid-tightly sealed. Harness.   The wire harness according to claim 3, wherein the holder has an insertion hole in the radial direction, and the sealing member is a rubber plug, and is inserted into the insertion hole in a liquid-tight manner.   The wire harness according to claim 2, wherein the holder is constituted by an integral rubber plug that covers the periphery of the electric wire.   The wire harness according to any one of claims 2 to 5, wherein the shield member is folded back from the inner surface side of the exterior member to the outer surface side, and the folded portion is housed in the housing recess.

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