JP2022161576A - Wire harness and manufacturing method for the same - Google Patents

Abstract

To provide a wire harness capable of retaining waterproofness and a manufacturing method for the same.SOLUTION: A wiring harness 1 includes a plurality of wires 3, a watertight part 5 provided at a predetermined section in the length direction of the plurality of wires 3 and filling a gap between the plurality of wires 3 by filling a liquid curable seal material 9, and shielding members 7 arranged on both ends of the watertight part 5 in the length direction at least and continuously extending out toward the radial direction of the plurality of wires 3. The shielding members 7 are provided with a wire accommodating part 17 into which at least one wire 3 of the plurality of wires 3 is inserted.SELECTED DRAWING: Figure 2

Description

The present invention relates to a wire harness and a wire harness manufacturing method.

Conventionally, a wire harness includes a plurality of electric wires and a water stop portion provided in a predetermined section in the length direction of the plurality of electric wires and filled with a liquid curing sealing material to fill the gaps between the plurality of electric wires. is known (see Patent Document 1).

The water stop portion is formed by applying a liquid curable sealing material to predetermined positions of a plurality of electric wires so as to permeate between the plurality of electric wires, and winding a sheet around the periphery. The water stop portion prevents water from entering from one side to the other in the length direction due to, for example, capillary action.

JP-A-2005-73422

By the way, in the wire harness as disclosed in Patent Literature 1, the water stop portion is filled with a liquid curable sealing material. The sealing material hardens between the electric wires, thereby being held in the water stop portion and sealing between the electric wires.

However, since the sealing material is filled between a plurality of electric wires in a liquid state, it may flow out along the electric wires from both sides in the length direction of the waterproof portion until it hardens. If the sealing material flows out from the water stop portion, there is a possibility that gaps may be formed between a plurality of electric wires, and there is a concern that the waterproofness may deteriorate.

The present invention has been made in view of the problems of the prior art. An object of the present invention is to provide a wire harness and a wire harness manufacturing method that can maintain waterproofness.

The wire harness according to the present embodiment is provided with a plurality of electric wires and a predetermined section in the length direction of the plurality of electric wires, and fills the gaps between the plurality of electric wires by filling a liquid curing sealing material. a water stop portion; and shielding members disposed at least on both lengthwise end sides of the water stop portion and extending continuously in a radial direction of the plurality of electric wires, wherein the shield member includes and a wire receiving portion through which at least one of the plurality of wires is inserted.

It is preferable that the plurality of electric wires are composed of at least two types of electric wires having different diameters, and that electric wires having a large diameter are arranged in the electric wire accommodating portion.

It is preferable that the wire housing portion is provided with an opening through which the wire can be inserted into the wire housing portion.

Preferably, the shielding member is made of an elastic member that is elastically deformable.

It is preferable that the shield member is formed continuously in the length direction of the water stop portion.

In the wire harness manufacturing method according to the present embodiment, a plurality of wires are provided in a predetermined section in the length direction of the plurality of wires, and a gap between the plurality of wires is filled with a liquid curing sealing material. and a shielding member disposed at least on both ends in the length direction of the water shutoff portion and extending continuously in the radial direction of the plurality of electric wires, wherein the shielding member is a method for manufacturing a wire harness having a wire receiving portion through which at least one of the plurality of wires is inserted, wherein at least one of the plurality of wires is a first step of arranging the shielding member by inserting the electric wire through the electric wire accommodating portion on both ends in the length direction where the water stop portion is provided; A second step of arranging and a third step of filling the water stop portion with a liquid curable sealing material.

ADVANTAGE OF THE INVENTION According to this invention, the wire harness which can maintain waterproofness, and a wire harness manufacturing method can be provided.

1 is a perspective view of a wire harness according to a first embodiment; FIG. 1 is a cross-sectional view of a wire harness according to a first embodiment; FIG. FIG. 4 is a side view when a shielding member is attached to the electric wires of the wire harness according to the first embodiment; FIG. 4 is a perspective view when arranging the electric wires to which the shielding member of the wire harness according to the first embodiment is attached to a plurality of electric wires; It is a perspective view of a shielding member of the wire harness according to the first embodiment. It is a front view of the shielding member of the wire harness according to the first embodiment. It is a front view when a shielding member is attached to the electric wire of the wire harness according to the first embodiment. FIG. 11 is a perspective view showing an example of a shielding member of the wire harness according to the second embodiment; FIG. 11 is a perspective view showing another example of the shielding member of the wire harness according to the second embodiment; FIG. 11 is a perspective view showing another example of the shielding member of the wire harness according to the second embodiment;

A wire harness and a wire harness manufacturing method according to the present embodiment will be described in detail below with reference to the drawings. Note that the dimensional ratios in the drawings are exaggerated for convenience of explanation, and may differ from the actual ratios.

(First embodiment)
A first embodiment will be described with reference to FIGS. 1 to 7. FIG.

The wire harness 1 according to this embodiment is arranged, for example, in a grommet (not shown) arranged in a through hole of a panel arranged in a vehicle. When the grommet is attached to the through-hole of the panel, the grommet is in close contact with the surface of the panel located around the through-hole, and separates the space on one side of the panel from the space on the other side.

The grommet has a tubular wire insertion portion extending along the length direction of the wire harness 1 so that the wire harness 1 can be inserted through the through hole of the panel. The inner peripheral surface of the wire insertion portion is in close contact with the outer peripheral surface of the wire harness 1 to seal the space between the wire insertion portion and the wire harness 1 .

As shown in FIGS. 1 to 7, the wire harness 1 includes a plurality of electric wires 3, a water stop portion 5, and a shielding member . The plurality of electric wires 3 electrically connect, for example, between a power source and equipment or between equipment. The plurality of electric wires 3 are composed of at least two types of electric wires having different diameters, such as power lines for supplying electric power and communication lines for transmitting information. The plurality of electric wires 3 are provided with a water stop portion 5 in a predetermined section in the length direction, for example, at a portion inserted through the electric wire insertion portion of the grommet.

The water stop portion 5 has a sealing material 9 that fills the gaps between the electric wires 3 . The sealing material 9 is made of, for example, a liquid curable filler such as silicon that hardens over time from a liquid state. The sealing material 9 is filled in a liquid state so as to fill the gaps between the plurality of wires 3 in a predetermined lengthwise section where the water stop portions 5 of the plurality of wires 3 are provided.

A sheet 11 is wrapped around the periphery filled with the sealing material 9 . Tapes 13, 13 are wound on both sides of the sheet 11 in the length direction, and the sheet 11 is fixed. The sealing material 9 filled between the electric wires 3 hardens over time. The hardened sealing material 9 prevents water or the like from entering along the electric wire 3 from one side to the other in the longitudinal direction due to, for example, capillary action.

In such a water stop portion 5 , the sealing material 9 is filled in a liquid state so as to fill the gaps between the plurality of electric wires 3 . For this reason, the sealing material 9 may flow out along the electric wires 3 from both sides in the length direction of the water stop portion 5 before it hardens.

If the sealing material 9 flows out of the water stop portion 5, there is a possibility that gaps will be formed between the plurality of electric wires 3, and there is a concern that the waterproofness will deteriorate. In particular, the gap filled with the sealing material 9 is large at the portion where the large-diameter wires of the plurality of electric wires 3 overlap, and the gap is likely to be formed by the sealing material 9 flowing out from the water stop portion 5 . Therefore, shielding members 7 and 7 are arranged at both ends of the water stop portion 5 in the length direction.

The shielding member 7 is made of, for example, an elastic member such as rubber. The shielding member 7 has a shielding portion 15 formed so as to extend continuously in the radial direction of the plurality of electric wires 3 . The shielding portion 15 prevents the liquid sealing material 9 filled in the water stop portion 5 from flowing out from both sides of the water stop portion 5 in the length direction. The shielding portion 15 is provided with a wire accommodating portion 17 through which a large-diameter wire having the largest diameter among the plurality of wires 3 is inserted.

A plurality of (here, four) wire housing portions 17 are provided for the shield portion 15 . The wire accommodating portion 17 is formed of a hole extending through the shielding portion 15 in the longitudinal direction. The inner diameter of the wire accommodating portion 17 is set slightly smaller than the outer diameter of the wire 3 having the largest diameter (large-diameter wire). Therefore, when the electric wires 3 are inserted through the electric wire accommodating portion 17, the inner peripheral surface of the electric wire accommodating portion 17 is in close contact with the outer peripheral surface of the electric wires 3, and the shielding member 7 and the electric wires 3 are sealed.

The wire housing portion 17 is provided with an opening 19 through which the wire 3 can be inserted into the wire housing portion 17 . The opening 19 is made smaller than the outer diameter of the wire 3 having the largest diameter (large-diameter wire). The opening 19 is expanded by elastic deformation when the wire 3 is inserted into the wire housing portion 17 , and restored to be closed when the wire 3 is housed in the wire housing portion 17 . By restoring the opening 19 in the closing direction, the inner peripheral surface of the wire accommodating portion 17 is brought into close contact with the outer peripheral surface of the wire 3 .

By providing the opening 19 in the wire housing portion 17, the shielding member 7 can be assembled at any position in the length direction of the wire 3 even when members such as connectors are attached to both ends of the wire 3. can be attached. The wire housing portion 17 is formed as a through hole, the ends of the wires 3 in the length direction are inserted into the wire housing portion 17, and the shielding member 7 is moved along the length direction of the wire 3 and arranged. good too.

Such a shielding member 7 is arranged before a plurality of (here, four) large-diameter wires (large-diameter wire group) having the largest diameter among the plurality of wires 3 (large-diameter wire group) are arranged on the plurality of wires 3 (small-diameter wire group). It is attached to a plurality of large-diameter electric wires in the state of The shielding members 7 are arranged on both end sides of the lengthwise section in which the water stop portions 5 of the plurality of large-diameter electric wires are provided. In the arrangement state of the shielding member 7 with respect to the plurality of large-diameter wires, the large-diameter wires are arranged in close contact with each of the plurality (here, four) of the wire housing portions 17 . Therefore, in the portion where the shielding member 7 is arranged, the shielding portion 15 is arranged in the gap between the plurality of large-diameter electric wires.

The plurality of electric wires 3 (large-diameter electric wire group) to which the shielding members 7, 7 are assembled are arranged so as to be positioned inside the plurality of electric wires 3 (small-diameter electric wire group). At this time, in the portion where the shielding member 7 is arranged, a plurality of electric wires 3 (small-diameter electric wires) positioned on the outer periphery of the shielding member 7 are arranged in close contact with the outer peripheral surface of the shielding member 7 .

Then, the liquid sealing material 9 is filled in the portion forming the water stop portion 5 . At this time, the sealing material 9 that is about to flow out from both sides in the length direction of the water stop portion 5 along the large-diameter electric wire is blocked by the shield portion 15 and stays in the water stop portion 5 . Therefore, the spaces between the plurality of electric wires 3 are sufficiently filled with the sealing material 9, and the formation of gaps between the plurality of electric wires 3 can be prevented. In particular, it is possible to prevent the formation of gaps between a plurality of large-diameter electric wires, in which large gaps are likely to be formed.

In the method of manufacturing such a wire harness 1, first, a plurality (four in this case) of large-diameter wires among the plurality of wires 3 are arranged. Next, the shielding members 7, 7 are arranged by inserting the large-diameter electric wires into the respective electric wire housing portions 17 on both ends in the length direction where the water stop portions 5 for the large-diameter electric wires are provided (first step ).

Next, a plurality of large-diameter wires (large-diameter wire group) on which the shielding members 7 are arranged are arranged on a plurality of wires 3 (small-diameter wire group) (second step). Then, the water cutoff portion 5 is filled with a liquid curable sealing material 9 (third step). The sheet 11 may be assembled after the sealing material 9 is filled in the waterproof portion 5, or may be assembled after the sealing material 9 is cured. However, if the sheet 11 is assembled after the sealing material 9 is cured, there is a waiting time until the sealing material 9 is cured.

In such a wire harness 1 , shielding members 7 continuously extending in the radial direction of the plurality of electric wires 3 are arranged at least on both lengthwise end sides of the water stop portion 5 . The shielding member 7 is provided with a wire accommodating portion 17 through which at least one of the plurality of wires 3 is inserted. Therefore, the shielding member 7 can prevent the sealing material 9 filled in the water stop portion 5 from flowing out from both sides in the length direction of the water stop portion 5 in a liquid state before hardening.

Therefore, in such a wire harness 1, the sealing material 9 is sufficiently filled between the plurality of electric wires 3 to prevent the formation of gaps between the plurality of electric wires 3, thereby maintaining waterproofness. can be done.

Moreover, the plurality of electric wires 3 are composed of at least two types of electric wires having different diameters. An electric wire having a large diameter is arranged in the electric wire accommodating portion 17 . Therefore, it is possible to prevent the sealing material 9 from flowing out from the water stop portion 5 around the large-diameter electric wires 3 where gaps are likely to be formed between the electric wires 3 .

Furthermore, the wire housing portion 17 is provided with an opening 19 through which the wire 3 can be inserted into the wire housing portion 17 . Therefore, the shielding member 7 can be assembled at any position in the length direction of the electric wire 3, and assemblability can be improved.

Moreover, the shielding member 7 is made of an elastic member that can be elastically deformed. Therefore, the electric wires 3 arranged in the electric wire accommodating portion 17 and the electric wires 3 arranged around the shielding member 7 can be brought into close contact with the shielding member 7, and the waterproofness can be improved.

Further, in the wire harness manufacturing method, the wire 3 is inserted into the wire housing portion 17 at both ends of at least one of the plurality of wires 3 in the length direction where at least the water stop portion 5 is provided, and the shielding member is formed. There is a first step of placing 7 . Further, the wire harness manufacturing method includes a second step of arranging the electric wires 3 having the shielding member 7 arranged on the plurality of electric wires 3, and a third step of filling the liquid curable sealing material 9 into the water stop portion 5. have. Therefore, the shielding member 7 can prevent the sealing material 9 filled in the water stop portion 5 from flowing out from both sides in the length direction of the water stop portion 5 in a liquid state before hardening.

Therefore, in such a wire harness manufacturing method, it is possible to sufficiently fill the seal material 9 between the plurality of electric wires 3 to prevent the formation of gaps between the plurality of electric wires 3, thereby maintaining waterproofness. be able to.

(Second embodiment)
A second embodiment will be described with reference to FIGS. 8 to 10. FIG.

In the wire harness according to this embodiment, the shielding member 103 is formed continuously in the length direction of the water stop portion 5 .

It should be noted that the same reference numerals are given to the same configurations as in the first embodiment, and the description of the configurations and functions will be omitted because they refer to the first embodiment. the effect is the same.

As shown in FIG. 8, the shielding member 103 is formed continuously in the length direction of the water stop portion 5 so as to be arranged over the entire lengthwise section of the water stop portion 5 (see FIG. 1). ing. Shielding portions 15 , 15 in which a plurality of (here, four) wire accommodating portions 17 are formed are provided at portions of the shielding member 103 disposed at both ends of the water stop portion 5 . Between the shielding parts 15, 15, a cylindrical connecting part 105 is provided, which is formed of one member continuous with the central part of the shielding parts 15, 15 and connects the shielding parts 15, 15. As shown in FIG. By forming the shielding member 103 as one continuous member in this way, the shielding member 103 can be handled as one member, and the number of parts can be reduced.

A continuously formed shielding member may be a shielding member 103a as shown in FIG. The shield member 103a is formed continuously in the length direction of the water stop portion 5 so that the shield portion 15a is arranged over the entire section of the water stop portion 5 in the length direction. A plurality of (here, four) wire housing portions 17a are formed in the shielding portion 15a over the entire length thereof. The wire accommodating portion 17a is formed with an opening 19a that can accommodate the wire 3 (see FIG. 2) in the entire lengthwise direction.

Also, as the continuously formed shielding member, a shielding member 103b as shown in FIG. 10 may be used. The shield member 103b is formed continuously in the length direction of the water stop portion 5 so that the shield portion 15b is arranged over the entire section of the water stop portion 5 in the length direction. A plurality of shielding portions 15b are formed continuously in the width direction. Each of the plurality of shielding portions 15b is formed with a wire accommodating portion 17b extending through the shielding portion 15b in the longitudinal direction at the central portion thereof. An opening 19b is formed in the wire housing portion 17b so that the wire 3 can be housed in the wire housing portion 17b. Such a shielding member 103b is cut at a position corresponding to the number of electric wires 3 to be used.

In such a wire harness, the shielding member 103 is formed continuously in the length direction of the water stop portion 5 . Therefore, the shielding member 103 can be handled as a single member, and the number of parts can be reduced.

Although the present embodiment has been described above, the present embodiment is not limited to these, and various modifications are possible within the scope of the gist of the present embodiment.

For example, the shielding member is provided with four wire accommodating portions, but the present invention is not limited to this. Just do it. In addition, the shielding member may be provided with a wire accommodating portion in which all the wires are arranged.

1 wire harness 3 electric wire 5 water stop portion 7, 103 shielding member 9 sealing material 17 wire housing portion 19 opening

Claims (6)

a plurality of wires;
a water stop portion provided in a predetermined section in the length direction of the plurality of electric wires and filling a gap between the plurality of electric wires by filling a liquid hardening sealing material;
a shielding member disposed at least on both ends in the length direction of the water stop portion and extending continuously in the radial direction of the plurality of electric wires;
with
A wire harness, wherein the shielding member is provided with a wire accommodating portion through which at least one of the plurality of wires is inserted. The plurality of electric wires are composed of at least two types of electric wires having different diameters,
The wire harness according to claim 1, wherein wires having a large diameter are arranged in the wire accommodating portion. The wire harness according to claim 1 or 2, wherein the wire accommodating portion is provided with an opening through which the wire can be inserted into the wire accommodating portion. The wire harness according to any one of claims 1 to 3, wherein the shielding member is made of an elastic member that can be elastically deformed. The wire harness according to any one of claims 1 to 4, wherein the shielding member is formed continuously in the length direction of the water stop portion. a plurality of electric wires, a water stop portion provided in a predetermined section in the length direction of the plurality of electric wires and filled with a liquid hardening sealing material to fill gaps between the plurality of electric wires, and at least the water stop portion. shielding members disposed on both ends in the length direction of the portion and extending continuously in the radial direction of the plurality of electric wires, wherein the shielding member includes at least one of the plurality of electric wires; A method for manufacturing a wire harness provided with an electric wire housing portion through which the electric wires of
a first step of arranging the shielding member by inserting the electric wire through the electric wire accommodating portion on both lengthwise end sides of at least one electric wire among the plurality of electric wires where the water stop portion is provided;
a second step of arranging the electric wire on which the shielding member is arranged to the plurality of electric wires;
a third step of filling the water stop portion with a liquid curable sealing material;
A wire harness manufacturing method having

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