JP2022028360A - Wire harness - Google Patents

Abstract

To provide a wire harness that can achieve both of high binding properties and low rigidity of a wire bundle.SOLUTION: A wire harness 3 has a wire bundle 5 having a plurality of wires 4, and a binding part 6 for binding the plurality of wires 4. The binding part 6 is formed from a material having flexibility, and is provided to be interposed at least among the plurality of wires 4.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to wire harnesses.

Conventionally, as a wire harness for electrically connecting electrical components to each other in a vehicle, a wire harness in which a plurality of electric wires are bundled into a bundle of electric wires is widely used. As a method of bundling electric wires, for example, a method of winding a bundle of electric wires with tape is common. However, when this binding method is used, the wire bundle has a high rigidity at the portion bound by the tape. Therefore, even if it is necessary to bend the wire harness when assembling the wire harness to the vehicle, there is a possibility that the target trajectory is not taken.

As a countermeasure, for example, Patent Document 1 discloses a technique for binding a bundle of electric wires by using a tape provided with a large number of flexible columnar small convex portions on an adhesive surface. By bundling the wire bundle with this tape, it is possible to keep the rigidity low, so that it becomes easy to arrange the wire harness along the targeted trajectory when assembling the wire harness.

Japanese Unexamined Patent Publication No. 2010-004615

However, in the case of Patent Document 1, since the adhesive surface of the tape has an uneven shape, the contact surface with respect to the electric wire bundle is reduced. Therefore, there is a possibility that a sufficient binding effect cannot be obtained. Further, since it is necessary to use a tape having a special shape having a plurality of columnar small protrusions on the adhesive surface, there is a problem in terms of component cost.

An object of the present invention is to provide a wire harness capable of achieving both high binding property and low rigidity of an electric wire bundle.

The wire harness of the present disclosure includes a wire bundle having a plurality of electric wires and a binding portion for binding the plurality of electric wires, and the binding portion is formed of a flexible material and is formed between at least the plurality of electric wires. It is provided so as to intervene.

According to the present disclosure, it is possible to achieve both high cohesiveness and low rigidity of the electric wire bundle.

FIG. 1 is a schematic configuration diagram showing a wire harness of one embodiment. FIG. 2 is a sectional view taken along line II-II of FIG. FIG. 3 is a schematic view showing a binding portion of a wire harness. FIG. 4 is an explanatory diagram showing a method of forming a binding portion. FIG. 5 is a schematic cross-sectional view of another example wire harness. FIG. 6 is a schematic cross-sectional view of another example wire harness.

[Explanation of Embodiments of the present disclosure]
First, embodiments of the present disclosure will be listed and described.
The wire harness of the present disclosure is
[1] A wire bundle having a plurality of electric wires and a binding portion for binding the plurality of electric wires are provided, and the binding portion is formed of a flexible material so as to be interposed between at least the plurality of electric wires. It is provided.

According to this configuration, since a plurality of electric wires are bound by interposing a binding portion between the electric wires, it is possible to strongly fix the adjacent electric wires to each other. Further, a highly flexible material is used for the binding portion. Therefore, in the wire harness, it is possible to achieve both high binding property and low rigidity of the wire bundle.

[2] It is preferable that the binding portion is provided both between the plurality of electric wires and around the electric wire bundle. According to this configuration, the wire bundle can be firmly fixed by the binding portion, which further contributes to ensuring high binding property of the wire bundle. In addition, the purpose of protection and the prevention of abnormal noise can be satisfied.

[3] It is preferable that the binding portion is made of a foamed resin that is hardened with the lapse of time after being attached to the electric wire bundle and becomes elastic. According to this configuration, a binding portion can be provided on the wire bundle by a simple method of spraying a liquid foamed resin on the wire bundle and waiting for a while.

[4] The binding portion preferably has air bubbles contained in the foamed resin. According to this configuration, the air bubbles contained inside the binding portion can ensure sufficient flexibility required for bending the wire bundle.

[5] It is preferable to have an exterior member that covers the periphery of the binding portion. According to this configuration, sufficient flexibility required for bending the electric wire bundle can be obtained at the binding portion, so that a general-purpose tape or the like can be used as the exterior member. Therefore, it is not necessary to use an expensive exterior member having a special function that can satisfy both the high binding property and the low rigidity of the electric wire bundle.

[6] It is preferable that the binding portion is provided at the bent portion of the wire bundle. According to this configuration, since the binding portion is locally provided at the bent portion of the wire bundle where low rigidity is required, the cost of parts and the weight of parts are reduced as compared with the case where the binding portion is provided over the entire wire bundle, for example. The effect of is high.

[Details of Embodiments of the present disclosure]
Specific examples of the wire harness of the present disclosure will be described below with reference to the drawings. It should be noted that the present invention is not limited to these examples, and is indicated by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims. In each drawing, for convenience of explanation, a part of the configuration may be exaggerated or simplified. In addition, the dimensional ratio of each part may differ from the actual one.

As shown in FIG. 1, the vehicle 1 includes, for example, a plurality of electrical components 2 related to the operation of the vehicle 1. The electrical component 2 includes, for example, a battery, a motor, an air conditioner device, a winker device, an airbag device, and the like. In the case of this example, a plurality of electrical components 2 (in this example, the first electrical component 2a and the second electrical component 2b are mentioned) are electrically connected by a wire harness 3.

As shown in FIG. 2, the wire harness 3 includes a wire bundle 5 having a plurality of electric wires 4 and a binding portion 6 for bundling the plurality of electric wires 4. Each of the electric wires 4 has a structure in which the circumference of the wire is covered. Examples of the covering material of the electric wire include PVC (polyvinyl chloride), cross-linked polyethylene, and polyolefin. The electric wire 4 in the figure includes, for example, two electric wire groups of a large-diameter wire and a small-diameter wire.

The binding portion 6 is provided at least between the electric wires 4. In the case of this example, the binding portion 6 is provided both between the electric wires 4 and around the electric wire bundle 5. The binding portion 6 is formed of, for example, a flexible material. In the case of this example, the foamed resin 7 is used for the binding portion 6. As the foamed resin 7, for example, urethane foam is used. A plurality of bubbles 8 are provided inside the binding portion 6. The bubble 8 is, for example, a component of the foamed resin.

The periphery of the binding portion 6 is covered with the exterior member 9. For the exterior member 9, for example, a strip-shaped tape 10 is used. The tape 10 is attached around the binding portion 6 by, for example, half-wrap winding. The half-wrap winding is, for example, a winding method in which the tapes 10 are overlapped and wound along the axis of the electric wire bundle 5 while being overlapped by 1/2 in the width direction.

As shown in FIG. 3, the binding portion 6 is provided in the bent portion 12 of the electric wire bundle 5 formed in a bent shape. As described above, the binding portion 6 is provided in the bending portion 12 of the electric wire bundle 5 whose rigidity is desired to be lowered. In the case of this example, the binding portion 6 is provided in each of a plurality of bending portions 12 provided in the electric wire bundle 5.

Next, the operation of the wire harness 3 of the present embodiment will be described.
FIG. 4 illustrates a manufacturing example of the binding portion 6. As shown in the figure, the binding portion 6 is formed by spraying the foamed resin 7 from the foamed resin feeder 13 onto the electric wire bundle 5. The foamed resin feeder 13 is, for example, a spray can filled with the foamed resin 7. Urethane foam, which is an example of the foamed resin 7, is a commonly used substance and has elasticity. Urethane foam spray cans are filled with urethane foam, and foamed urethane pops out when sprayed. The urethane foam sprayed on the binding portion 6 hardens with the passage of time and becomes an elastic substance. When the binding portion 6 is formed by a spray can, the foamed resin 7 can be instantly sprayed on the electric wire bundle 5, and the working time can be shortened.

Forming the binding portion 6 and binding the tape 10 around the electric wire bundle 5. In the case of this example, the tape 10 is wound around the wire bundle 5 by half-wrap winding. Further, the tape 10 may be wound only around the binding portion 6, or may be wound around the binding portion 6 and other wire bundles 5.

In the case of this example, when the wire harness 3 is assembled to the vehicle body, if bending stress is applied to the wire harness 3, the binding portion 6 that functions as a cushion layer expands and contracts. As described above, the wire harness 3 is easily bent at the binding portion 6. As described above, since the rigidity of the bent portion 12 of the wire harness 3 is low, it is possible to crawl the wire harness 3 along the path intended by the user.

Further, when fixing the electric wires 4 in a bundle, the bundle of the electric wires 4 is fixed with low rigidity by providing the binding portion 6 in the electric wire bundle 5. Therefore, it is not necessary to use a specially processed tape material as the tape material for fixing the bundle of the electric wires 4. That is, the tape 10 can use a conventional product. Therefore, the cost of parts will not be significantly increased.

Further, when the binding portion 6 is formed so as to exist around the electric wire bundle 5, the binding portion 6 can protect the electric wire 4. Further, since the electric wire 4 and the tape 10 do not come into direct contact with each other, it is also a countermeasure against abnormal noise that may occur due to the electric wire 4 and the tape 10 coming into contact with each other.

According to the wire harness 3 of the above embodiment, the following effects can be obtained.
(1) The wire harness 3 includes a wire bundle 5 having a plurality of electric wires 4 and a binding portion 6 for bundling the plurality of electric wires 4. The binding portion 6 is made of a flexible material and is provided so as to be interposed between at least a plurality of electric wires 4.

According to the configuration of this example, since the plurality of electric wires 4 are bundled by interposing the binding portion 6 between the electric wires 4, it is possible to strongly fix the adjacent electric wires 4 to each other. Further, a highly flexible material is used for the binding portion 6. Therefore, in the wire harness 3, it is possible to achieve both high binding property and low rigidity of the electric wire bundle 5.

(2) The binding portion 6 is provided both between the plurality of electric wires 4 and around the electric wire bundle 5. In this case, since the wire bundle 5 can be firmly fixed by the binding portion 6, it further contributes to ensuring the high binding property of the wire bundle 5. In addition, the purpose of protection and the prevention of abnormal noise can be satisfied.

(3) As the binding portion 6, a foamed resin 7 that is hardened with the lapse of time after being attached to the electric wire bundle 5 and becomes elastic is used. In this case, the binding portion 6 can be provided on the electric wire bundle 5 by a simple method of spraying the liquid foamed resin 7 on the electric wire bundle 5 and waiting for a while.

(4) The binding portion 6 has bubbles 8 contained in the foamed resin 7. In this case, the air bubbles 8 contained inside the binding portion 6 can secure sufficient flexibility required for bending the electric wire bundle 5.

(5) The wire harness 3 includes an exterior member 9 that covers the periphery of the binding portion 6 and binds the electric wire bundle 5. According to this configuration, sufficient flexibility required for bending the electric wire bundle 5 is obtained by the binding portion 6, so that a general-purpose tape or the like can be used as the exterior member 9. Therefore, it is not necessary to use an expensive exterior member 9 having a special function that can satisfy both the high binding property and the low rigidity of the electric wire bundle 5. Further, by attaching the exterior member 9 around the binding portion 6, the electric wire bundle 5 is fixed via the binding portion 6, which further contributes to ensuring the high binding property of the electric wire bundle 5.

(6) The binding portion 6 is provided at a bent portion of the electric wire bundle 5. In this case, since the binding portion 6 is locally provided at the bent portion of the electric wire bundle 5 where low rigidity is required, the cost of parts can be reduced and the parts can be reduced as compared with the case where the binding portion 6 is provided over the entire area of the electric wire bundle 5, for example. The effect of weight reduction is high.

In addition, this embodiment can be changed and carried out as follows. The present embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
As shown in FIG. 5, the wire harness 3 may have a structure in which a plurality of flat cables in which a plurality of electric wires 4 are arranged in the horizontal direction are stacked in the height direction. In this case, since it is possible to fix each of the flat cables located adjacent to each other in the height direction with the foamed resin 7, even in such a flat cable multilayer structure wire harness 3, the wire bundle 5 has high cohesiveness. And low rigidity can be achieved at the same time.

As shown in FIG. 6, the binding portion 6 may be, for example, a columnar member 21 having flexibility sandwiched in the center of the electric wire bundle 5. The columnar member 21 is, for example, cylindrical, and is a urethane sponge or low-hardness silicone rubber. Even with this structure, it is possible to achieve both high cohesiveness and low rigidity of the electric wire bundle 5.

-The electric wire 4 is not limited to using two types having different diameters, and may be three or more types, or may be only one type.
The binding portion 6 may be provided, for example, only between the electric wires 4.

The binding portion 6 is not limited to the spray injection type, and may be, for example, a method of directly attaching the material to the electric wire bundle 5 by hand or the like.
The binding portion 6 may be provided in any portion of the electric wire bundle 5.

-The tape 10 is not limited to the one provided with the adhesive on the entire surface, and may be, for example, the one provided with the adhesive only at the end portion in the length direction.
The exterior member 9 that binds the electric wire bundle 5 is not limited to the tape agent, and may be, for example, a member such as a tube.

-The wire harness 3 is not limited to being used for vehicles, but may be used for other devices and devices.
• The present disclosure has been described in accordance with the examples, but it is understood that the present disclosure is not limited to the examples and structures. The present disclosure also includes various variations and variations within a uniform range. In addition, various combinations and forms, as well as other combinations and forms that include only one element, more, or less, are within the scope and scope of the present disclosure.

1 Vehicle 2 Electrical components 3 Wire harness 4 Electric wire 5 Electric wire bundle 6 Bundling part 7 Foamed resin 8 Bubbles 9 Exterior member 10 Tape 12 Bent part 13 Foamed resin feeder 21 Columnar member

Claims (6)

A bundle of wires with multiple wires and
A bundling portion for bundling the plurality of electric wires is provided.
The binding portion is a wire harness formed of a flexible material and provided so as to be interposed between at least the plurality of electric wires. The wire harness according to claim 1, wherein the binding portion is provided both between the plurality of electric wires and around the electric wire bundle. The wire harness according to claim 1 or 2, wherein the binding portion is made of a foamed resin that hardens with the lapse of time after being attached to the electric wire bundle and becomes elastic. The wire harness according to claim 3, wherein the binding portion has air bubbles contained in the foamed resin. The wire harness according to any one of claims 1 to 4, further comprising an exterior member that covers the periphery of the binding portion. The wire harness according to any one of claims 1 to 5, wherein the binding portion is provided at a bent portion of the electric wire bundle.

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