JP6835024B2 - Wire harness - Google Patents

Description

The present invention relates to a wire harness.

Conventionally, for example, in a wire harness for a vehicle, the electric wire is covered with a shield member in order to shield electromagnetic noise generated by energizing the electric wire. The shield member is made of a braided wire in which a conductive wire such as an aluminum alloy is woven into a tubular shape, and has flexibility. As such a shield member, an individual shield member that individually covers the outer periphery of the insulating coating of the electric wire with the shield member is known (see, for example, Patent Document 1). The outer circumference of the individual shield member described in Document 1 is covered with a sheath. Further, there is known a collective shield member that collectively covers a plurality of electric wires with one shield member (see, for example, Patent Document 2). The outer periphery of the collective shield member described in Document 2 is covered with an exterior member such as a corrugated tube. The ends of the individual shield members and the collective shield members are electrically connected to the connectors provided at the ends of the electric wires.

JP-A-2010-165512 JP-A-2016-170991

By the way, the individual shield member and the collective shield member may be provided at different positions in the length direction of the wire harness. In this case, it is necessary to electrically connect the individual shield member and the collective shield member.

In such a connection structure, a structure is conceivable in which the exposed portion of the individual shield member exposed from the end portion of the sheath and the exposed portion of the collective shield member exposed from the end portion of the exterior member are connected. However, in this case, if rain, water, or the like adheres to the connecting portion where the exposed portions are connected to each other, the connecting portion may be corroded.

An object of the present invention is to provide a wire harness capable of suppressing corrosion of a connection portion between an individual shield member and a collective shield member.

A wire harness for achieving the above object is composed of a plurality of electric wires and a braided wire in which conductive wires are woven into a tubular shape, and a plurality of individual shields that are electromagnetically shielded by individually covering the plurality of the electric wires. It is composed of a member, a plurality of sheaths individually covering each of the individual shield members, and a braided wire in which conductive wires are woven into a tubular shape, and electromagnetically shields the plurality of electric wires by covering them collectively. A collective shield member, an exterior member covering the collective shield member, a portion of each of the individual shield members exposed from the end of the sheath, and a portion of the collective shield member exposed from the end of the exterior member. A tubular protective member made of an elastic member that protects the connection portion by surrounding the electrically connected connection portion, and is provided between one end of the protection member and each of the sheaths. A sealing member for sealing between one end and each of the sheaths is provided, and a sealing portion for sealing between the exterior member is provided at the other end of the protective member.

According to the same configuration, one end of the protective member and each sheath are sealed by a seal member, and the other end of the protective member and the exterior member are sealed by a seal provided at the other end. It will be sealed. Therefore, it is possible to prevent water or the like from adhering to the connection portion between each individual shield member and the collective shield member, and it is possible to suppress corrosion of the connection portion.

In the wire harness, the seal member is a plug body made of an elastic member, which closes an opening at one end of the protective member and has a plurality of insertion holes through which each of the sheaths is inserted. Is preferably tightened to the plug body by a tightening member.

According to the same configuration, by tightening the protective member against the plug body by the tightening member, the protective member and the plug body are elastically deformed, respectively. As a result, one end of the protective member and the plug body are sealed, and the inner peripheral surface of each insertion hole of the plug body and the outer peripheral surface of each sheath are sealed. Therefore, it is possible to seal between one end of the protective member and each sheath while using a plug body that is separate from the protective member.

Further, when applied to other types of wire harnesses having different numbers of electric wires, it is possible to change to a plug body having a number of insertion holes corresponding to the number of the electric wires. Therefore, a common protective member can be used in other types of wire harnesses.

In the wire harness, it is preferable that an annular lip portion that adheres to and seals the outer peripheral surface of the sheath is provided on the inner peripheral surface of the insertion hole of the plug body.
According to the same configuration, since the annular lip portion protruding from the inner peripheral surface of the insertion hole is in close contact with the outer peripheral surface of the sheath, it is effective between the inner peripheral surface of the insertion hole of the plug body and the outer peripheral surface of the sheath. Can be sealed.

In the wire harness, it is preferable that a recess for fitting the tightening member is provided along the circumferential direction of the protective member on the outer peripheral surface of the one end portion of the protective member.
According to this configuration, the tightening member is fitted into the recess provided on the outer peripheral surface of the protective member, so that the displacement of the tightening member in the axial direction of the protective member is suppressed. As a result, the reliability of the sealing performance of the plug body and the tightening member can be improved.

In the wire harness, the outer peripheral surface of the plug body is provided with a groove extending along the circumferential direction of the plug body, and the inner peripheral surface of the one end portion of the protective member is the circumference of the protective member. It is preferable that a protrusion that extends along the direction and fits into the groove is provided.

According to the same configuration, the protrusions provided on the inner peripheral surface of the protective member are fitted into the grooves provided on the outer peripheral surface of the plug body. Therefore, the plug body is positioned with respect to the protective member. As a result, the plug body can be easily assembled to one end of the protective member. Further, it is possible to effectively seal between the inner peripheral surface of the protective member and the outer peripheral surface of the plug body.

In the wire harness, it is preferable that the plug body is provided with an opening / closing portion extending along the axial direction of the insertion hole and opening / closing each other.
According to the same configuration, the plug body can be assembled from the outer peripheral side to the sheath of each electric wire by opening the opening / closing portion of the plug body. Therefore, the wire harness can be easily manufactured.

In the wire harness, the exterior member is a bellows tubular corrugated tube, an end portion of the exterior member is inserted into the other end of the protective member, and the seal portion is the protection. It is preferable that the ridges protrude from the inner peripheral surface of the other end of the member and fit into the concave groove on the outer peripheral surface of the exterior member.

According to the same configuration, the ridge protruding from the inner peripheral surface of the other end of the protective member fits into the concave groove on the outer peripheral surface of the corrugated tube, thereby between the other end of the protective member and the exterior member. Is sealed. In addition, the protective member is positioned with respect to the exterior member. Therefore, the seal portion can be embodied with a simple configuration.

According to the present invention, it is possible to suppress corrosion of the connection portion between the individual shield member and the collective shield member.

The plan view which shows the whole wire harness about one Embodiment of a wire harness. A cross-sectional view of the wire harness of the same embodiment centered on the connection portion. The exploded perspective view which shows the protection member and the plug body of the same embodiment separated from each other. FIG. 2 is a cross-sectional view corresponding to FIG. 2 for the wire harness of the modified example.

Hereinafter, one embodiment will be described with reference to FIGS. 1 to 3.
The wire harness of the present embodiment is laid out on a route including under the floor of a vehicle such as a hybrid vehicle or an electric vehicle, and a plurality of devices are electrically connected to each other.

As shown in FIGS. 1 and 2, the wire harness is provided on a plurality of electric wires 10 and one end side (left end side in FIG. 1) of each electric wire 10, and a plurality of wire harnesses for individually attaching each electric wire 10 to an apparatus. It is provided with an individual connector 21 and one collective connector 22 provided on the other end side (right end side in FIG. 1) of each electric wire 10 for collectively attaching each electric wire 10 to an apparatus.

As shown on the right side of FIG. 2, the electric wire 10 has a core wire 11 and a tubular insulating coating 12 that covers the outer periphery of the core wire 11. The core wire 11 is, for example, a stranded wire formed by twisting a plurality of metal strands made of a copper alloy. The insulating coating 12 is formed by extrusion molding an insulating material such as polyvinyl chloride (PVC).

<Individual shield member 31>
As shown in FIG. 2, the wire harness is provided with a plurality of individual shield members 31 that are electromagnetically shielded by individually covering the plurality of electric wires 10. The individual shield member 31 is made of a braided wire in which a conductive wire made of an aluminum alloy or the like is woven into a tubular shape, and has flexibility. One end of the individual shield member 31 is electrically connected to the individual connector 21. The other end 31b of the individual shield member 31 extends to an intermediate portion in the length direction of the electric wire 10.

Further, each electric wire 10 is provided with a sheath 13 that individually covers the individual shield member 31. The sheath 13 is made of an insulating material such as polyvinyl chloride (PVC). One end of the sheath 13 is connected to the individual connector 21. The other end 13b of the sheath 13 extends to an intermediate portion in the length direction of the electric wire 10.

<Batch shield member 32>
As shown in FIGS. 1 and 2, the wire harness is provided with one collective shield member 32 that electromagnetically shields the wire harness by collectively covering the plurality of electric wires 10. The collective shield member 32 is made of a braided wire in which a conductive wire made of an aluminum alloy or the like is woven into a tubular shape, and has flexibility. One end 32a of the collective shield member 32 is electrically connected to the collective connector 22 (see FIG. 1). Further, the other end 32b of the collective shield member 32 extends to an intermediate portion in the length direction of the electric wire 10.

The collective shield member 32 is covered with a corrugated tube 42 as an exterior member. The corrugated tube 42 has a bellows tubular shape and is flexible. A plurality of concave grooves 42a are provided on the outer peripheral surface of the corrugated tube 42 at intervals along the axial direction.

The other end 32b of the collective shield member 32 is exposed from the end of the corrugated tube 42.
As shown in FIG. 2, the portion of the collective shield member 32 exposed from the corrugated tube 42 covers the portion of each individual shield member 31 exposed from the sheath 13. Hereinafter, the portion of each individual shield member 31 exposed from the end of the sheath 13 and the portion of the collective shield member 32 exposed from the end of the corrugated tube 42 are electrically connected to be referred to as a connection portion 33. ..

<Cylindrical member 50>
As shown in FIG. 2, a cylindrical tubular member 50 through which each electric wire 10 is inserted is interposed between the outer peripheral surface of each electric wire 10 and the inner peripheral surface of each individual shield member 31. Each tubular member 50 is provided at a position corresponding to the connecting portion 33 of the collective shield member 32 in the length direction of the electric wire 10. The tubular member 50 of the present embodiment is made of, for example, brass.

The outer circumference of each tubular member 50 is tightened by the tightening member 60. The tightening member 60 is, for example, a well-known binding band made of a resin material.
<Protective member 70>
As shown in FIGS. 1 to 3, the connecting portion 33 is surrounded by a protective member 70 which is made of an elastic member and has a cylindrical shape. One end 70a of the protective member 70 has an opening 71, and the other end 70b is a reduced diameter portion 72. The end of the corrugated tube 42 is inserted into the reduced diameter portion 72.

On the inner peripheral surface of one end 70a of the protective member 70, a plurality of (two in the present embodiment) protrusions 73 extending along the circumferential direction of the protective member 70 are provided over the entire circumference at intervals in the axial direction. Has been done. Further, on the outer peripheral surface of the one end portion 70a, a recess 74 extending along the circumferential direction of the protective member 70 is provided over the entire circumference of the protective member 70. On the inner peripheral surface of the other end 70b of the protective member 70, a plurality of (four in the present embodiment) ridges 75 fitted in the concave groove 42a of the corrugated tube 42 are spaced apart from each other in the axial direction and all around the circumference. It is provided over.

<Plug 80>
As shown in FIGS. 2 and 3, one end 70a of the protective member 70 is provided with a plug 80 as a sealing member that closes the opening 71 of the one end 70a.

The plug 80 is made of an elastic member such as an elastomer, and has an insertion hole 81 through which each sheath 13 of each electric wire 10 is inserted. On the inner peripheral surface of each insertion hole 81, a plurality of (three in this embodiment) annular lip portions 81a that adhere to and seal the outer peripheral surface of the sheath 13 are provided at intervals in the axial direction. ..

A plurality of groove portions 82 corresponding to the protrusions 73 of the protective member 70 are provided on the outer peripheral surface of the plug body 80.
As shown in FIG. 3, the plug body 80 is provided with an opening / closing portion 83 extending along the axial direction of the insertion hole 81 and opening / closing each other. The plug 80 is opened and closed with a portion 84 on the opposite side of the opening / closing portion 83 with the insertion hole 81 as a fulcrum.

<Tightening member 89>
As shown in FIG. 2, the recess 74 of the protective member 70 is fitted with a tightening member 89 that tightens one end 70a of the protective member 70 to the plug 80. The tightening member 89 is, for example, a well-known binding band made of a resin material. The width of the recess 74 is slightly larger than the width of the tightening member 89.

The operation and effect of this embodiment will be described.
(1) The wire harness is a connecting portion in which a portion of each individual shield member 31 exposed from the end of the sheath 13 and a portion of the collective shield member 32 exposed from the end of the corrugated tube 42 are electrically connected. A cylindrical protective member 70 made of an elastic member that protects the connecting portion 33 by surrounding the 33 is provided. Further, the plug 80 as a sealing member having an insertion hole 81 through which each sheath 13 is inserted while closing the opening 71 of one end 70a of the protective member 70 and sealing between the one end 70a and each sheath 13. To be equipped. One end 70a of the protective member 70 is tightened to the plug 80 by the tightening member 89. The other end 70b of the protective member 70 is provided with a ridge 75 for sealing between the protective member 70 and the corrugated tube 42.

According to such a configuration, the stopper 80 seals between one end 70a of the protective member 70 and each sheath 13. Further, the ridge 75 protruding from the inner peripheral surface of the other end 70b of the protective member 70 fits into the concave groove 42a on the outer peripheral surface of the corrugated tube 42, so that the other end 70b of the protective member 70 and the corrugated tube The space between the 42 and 42 is sealed. Therefore, it is possible to prevent water or the like from adhering to the connection portion 33 between each individual shield member 31 and the collective shield member 32, and it is possible to suppress corrosion of the connection portion 33. Further, the protective member 70 is positioned with respect to the corrugated tube 42.

Further, according to the above configuration, by tightening one end 70a of the protective member 70 with respect to the plug 80 by the tightening member 89, the protective member 70 and the plug 80 are elastically deformed, respectively. As a result, one end 70a of the protective member 70 and the plug 80 are sealed, and the inner peripheral surface of each insertion hole 81 of the plug 80 and the outer peripheral surface of each sheath 13 are sealed. Therefore, it is possible to seal between one end 70a of the protective member 70 and each sheath 13 while using the plug 80 that is separate from the protective member 70.

Further, when applied to other types of wire harnesses having different numbers of electric wires 10, it is possible to change to a plug body having a number of insertion holes corresponding to the number of electric wires 10. Therefore, a common protective member 70 can be used in other types of wire harnesses.

(2) An annular lip portion 81a that closely adheres to and seals the outer peripheral surface of the sheath 13 is projected from the inner peripheral surface of the insertion hole 81 of the plug body 80.
According to such a configuration, the annular lip portion 81a protruding from the inner peripheral surface of the insertion hole 81 is in close contact with the outer peripheral surface of the sheath 13, so that the inner peripheral surface of the insertion hole 81 of the plug 80 and the outer circumference of the sheath 13 are in close contact with each other. It can effectively seal between the surfaces.

(3) A recess 74 into which the tightening member 89 is fitted is provided on the outer peripheral surface of one end 70a of the protective member 70 along the circumferential direction of the protective member 70.
According to such a configuration, the tightening member 89 is fitted into the recess 74 provided on the outer peripheral surface of the protective member 70, so that the displacement of the tightening member 89 in the axial direction of the protective member 70 is suppressed. As a result, the reliability of the sealing performance of the plug 80 and the tightening member 89 can be improved.

(4) A groove 82 extending along the circumferential direction of the plug 80 is provided on the outer peripheral surface of the plug 80, and the inner peripheral surface of one end 70a of the protective member 70 is provided with the circumferential direction of the protective member 70. A protrusion 73 that extends along the groove 82 and fits into the groove 82 is provided.

According to such a configuration, the protrusion 73 provided on the inner peripheral surface of the protective member 70 is fitted to the groove 82 provided on the outer peripheral surface of the plug 80. Therefore, the plug 80 is positioned with respect to the protective member 70. As a result, the plug 80 can be easily assembled to one end 70a of the protective member 70. Further, the inner peripheral surface of the protective member 70 and the outer peripheral surface of the plug 80 can be effectively sealed.

(5) The plug body 80 is provided with an opening / closing portion 83 extending along the axial direction of the insertion hole 81 and opening / closing each other.
When the plug body 80 cannot be opened and closed, it is necessary to slide the plug body 80 to the connecting portion 33 in a state where the electric wire 10 covered with the sheath 13 is inserted into the insertion hole 81 of the plug body 80 in advance. At this time, depending on the material of the sheath 13 and the plug body 80, it may be difficult to slide the plug body 80.

In this regard, according to the above configuration, the plug 80 can be assembled from the outer peripheral side to the sheath 13 of each electric wire 10 by opening the opening / closing portion 83 of the plug 80. Therefore, the wire harness can be easily manufactured.

This embodiment can be modified and implemented as follows. The present embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
In the modified example shown in FIG. 4 below, the same configurations as those in the above embodiment are designated by the same reference numerals, and the corresponding configurations are designated by a reference numeral to which "100" is added. Is omitted.

-As shown in FIG. 4, a plug 180 having a bulging portion 185 that bulges inward of the protective member 70 can also be adopted. The bulging portion 185 bulges from one end surface 180a of the plug body 180, and has an insertion hole 181 through which each sheath 13 of each electric wire 10 is inserted. A plurality of annular lip portions 181a are provided on the inner peripheral surface of the insertion hole 181.

According to the above configuration, since the lip portion 181a can be brought into close contact with the outer peripheral surface of the sheath 13 to expand the sealing range, the sealing performance between one end portion 70a of the protective member 70 and each sheath 13 is improved. be able to. Further, the tightening member 89 can suppress the deformation of the plug body 180 when the one end 70a is tightened with respect to the plug body 180.

As shown in FIG. 4, a tightening member 189 can be provided on the outer peripheral surface of the other end 70b of the protective member 70. In this case, it is preferable to provide a recess 174 in which the tightening member 189 fits on the outer peripheral surface.

According to the above configuration, the sealing performance between the other end 70b of the protective member 70 and the corrugated tube 42 can be improved.
-For example, when the plug body 80 is thick, a plurality of recesses 74 of the protective member 70 may be provided in the axial direction of the protective member 70. In this case, the protective member can be tightened to the plug body by a plurality of tightening members 89, or can be tightened by one tightening member having a convex portion corresponding to the plurality of concave portions 74.

-The groove 82 of the plug body 80 may be provided in a part of the plug body 80 in the circumferential direction, or may be provided in plurality at intervals in the circumferential direction. In these cases, a protrusion corresponding to the groove may be provided on the inner peripheral surface of one end 70a of the protective member 70.

-The number and shape of the insertion holes 81 of the plug body 80 can be changed as appropriate.
-The exterior member is not limited to the corrugated tube 42. Alternatively, for example, a pipe having a substantially cylindrical shape having a smooth outer peripheral surface can be adopted. In this case, it is preferable to provide a lip portion as a sealing portion on the inner peripheral surface of the other end portion 70b of the protective member 70 and to seal the other end portion 70b and the pipe by bringing them into close contact with each other.

10 ... Electric wire, 11 ... Core wire, 12 ... Insulation coating, 13 ... Sheath, 13b ... The other end, 21 ... Individual connector, 22 ... Batch connector, 31 ... Individual shield member, 31b ... The other end, 32 ... Batch shield member , 32a ... one end, 32b ... other end, 33 ... connection, 42 ... corrugated tube, 42a ... concave groove, 50 ... tubular member, 60 ... tightening member, 70 ... protective member, 70a ... one end, 70b The other end, 71 ... opening, 72 ... reduced diameter, 73 ... protrusion, 74 ... recess, 75 ... ridge, 80 ... plug, 81 ... insertion hole, 81a ... lip, 82 ... groove, 83 ... Opening and closing part, 84 ... part, 89 ... tightening member, 174 ... recess, 189 ... tightening member, 180 ... plug body, 180a ... one end surface, 181 ... insertion hole, 181a ... lip part, 182 ... groove part, 185 ... swelling Departure.

Claims (7)

With multiple wires,
A plurality of individual shield members, which consist of a braided wire in which a conductive wire is woven into a tubular shape and electromagnetically shield the plurality of the electric wires individually.
A plurality of sheaths that individually cover each of the individual shield members,
A collective shield member consisting of a braided wire in which a conductive wire is woven into a tubular shape and electromagnetically shielded by covering a plurality of the electric wires at once,
An exterior member that covers the collective shield member and
By surrounding the connection portion in which the portion of each of the individual shield members exposed from the end of the sheath and the portion of the collective shield member exposed from the end of the exterior member are electrically connected. A tubular protective member made of an elastic member that protects the connection part,
A sealing member provided between one end of the protective member and each of the sheaths and sealing between the one end and each of the sheaths is provided.
At the other end of the protective member, a seal portion for sealing between the protective member and the exterior member is provided.
Wire harness. The sealing member is a plug body made of an elastic member and having a plurality of insertion holes for closing the opening of the one end portion of the protective member and inserting each of the sheaths.
The protective member is fastened to the plug body by a tightening member.
The wire harness according to claim 1. An annular lip portion that adheres to and seals the outer peripheral surface of the sheath is provided on the inner peripheral surface of the insertion hole of the plug body.
The wire harness according to claim 2. A recess into which the tightening member is fitted is provided on the outer peripheral surface of the one end portion of the protective member along the circumferential direction of the protective member.
The wire harness according to claim 2 or 3. A groove extending along the circumferential direction of the plug body is provided on the outer peripheral surface of the plug body.
The inner peripheral surface of the one end portion of the protective member is provided with a protrusion extending along the circumferential direction of the protective member and fitting into the groove portion.
The wire harness according to any one of claims 2 to 4. The plug body is provided with an opening / closing portion extending along the axial direction of the insertion hole and opening / closing each other.
The wire harness according to any one of claims 2 to 5. The exterior member is a corrugated tube having a bellows tube shape.
An end portion of the exterior member is inserted into the other end portion of the protective member.
The seal portion is a ridge that protrudes from the inner peripheral surface of the other end of the protective member and fits into a concave groove on the outer peripheral surface of the exterior member.
The wire harness according to any one of claims 1 to 6.