JPH09233657A - Wiring of wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a good method for wiring a wire harness using an already- existing flat wire which allows the wire harness to be wired in a complicated wiring route and also increase the quality and manufacturing efficiency of the wire harness and the assembling workability of the wireharness into a vehicle. SOLUTION: A flat wire 1 is constituted of a plurality of wires 2 which are arranged parallelly to each other and planarly. In the flat wire 1, the wires 2 are adhered to each other at wire welding sections 3 which are formed at specified intervals and are separated from each other at wire separating sections 4 which are formed at specified intervals. One turn or a half turn is made to the flat wire 1 at the wire separating sections 4 to form spiral twisted sections 5. By forming the twisted sections 5 in parts of the flat wire 1 which needs bending to be wired, the flat wire 1 has a degree of freedom of bending in any direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring harness installation method for a vehicle or the like, and more particularly to a wiring harness installation method using a flat wire.

[0002]

2. Description of the Related Art Conventionally, a wire harness has been widely used for electrical connection between various electric components including a vehicle. As a normal wire harness, a wire harness having a converging shape in which a plurality of independent electric wires are converged by a binding tape or a binding band, and a flat shape in which a plurality of parallel electric wires are fixedly formed in a plane are generally used. It is used.

In recent years, the wiring space for wiring harnesses tends to be reduced in order to increase the number of electrical components for vehicles and to secure a living space (cabin space).
The flat cable used for the above flat-shaped wire harness can have a thin wiring cross section, and thus can cope with such a problem.
It has an advantage that the terminals to be connected to both ends can be collectively crimped (pressed) in an automated process. Therefore, in addition to the above-described convergent wire harness, the frequency of use of the flat wire harness is increasing.

[0004]

SUMMARY OF THE INVENTION In the conventional wire harness wiring method using the flat wire as described above, it is necessary to install the wire harness at a portion where bending and wiring are necessary, for example, a lower portion of a vehicle door mounting portion. There was a problem that it did not have sufficient degrees of freedom. That is, as shown in FIG. 5, the bending degree of freedom of the flat wire 1 is greatly influenced by the directionality of the electric wires 2 with respect to the arrangement plane. Therefore, even in a direction perpendicular to the extending direction F ₀ of the electric wire 2, the workability of assembling the wire harness is greatly affected depending on whether or not the electric wire is bent in the arrangement plane. Although it has a certain degree of freedom with respect to bending in a direction (vertical direction) F ₁ perpendicular to the array plane, with respect to a bending direction (horizontal direction) F ₂ in the array plane, It has almost no freedom. Therefore, there is a problem that the flat wire cannot be used depending on the wiring route of the wire harness.

Next, an example of a conventional method of laying a flat wire to a place where bending and laying is required will be described. As shown in FIG. 6A, for example, from the lower portion of the door mounting portion 11 of the vehicle body 10 to the vehicle bottom frame 12
At the location where the wiring route is defined in the direction, the flat wire 1 is bent in the direction perpendicular to the electric wire array plane having a degree of freedom to realize the desired wiring route. FIG.
Looking at the bent portion shown in FIG. 6A in detail, as shown in FIG. 6B, with respect to the drawing direction F ₀ of the flat wire 1,
For example, the bending angle β = 90 ° of the flat wire 1 is realized by forming the folded-back portion 7 which is valley-folded or mountain-folded at an angle of α = 45 °. It is not preferable to fold the flat wire 1 in such a manner so that not only the conductor portion of the electric wire is damaged but also additional resistance is generated, which is not preferable in terms of quality.

As a technique different from the existing wiring method using a flat wire, there is disclosed in Japanese Patent Laid-Open No. 62-198.
No. 543, a method of forming a bent portion by a combination of straight conductors, or a slit having a desired length is provided between wirings arranged in parallel as shown in Japanese Utility Model Laid-Open No. 6-77116. Although a method of forming a bent portion has been proposed, the former has a problem of increasing the manufacturing man-hours and the number of parts, and the latter has a degree of freedom only in the slit forming portion, so that it is assembled to a vehicle. At the time of
There is a problem that workability cannot be improved sufficiently.

In addition to the problems described above, the flat wire has the following problems:
Since it is necessary to stack flat wires and fix the tape, the number of work steps increases, and as shown in FIG.
In addition to the horizontal direction F ₂ , the flexibility is lost in the vertical direction F _{1 as} well, which makes it impossible to apply it to the bending installation location as shown in FIG. 6A. However, when assembling the wire harness to the vehicle, the workability was deteriorated.

The present invention solves the above-mentioned problems and presents a good wire harness arranging method capable of coping with a complicated wire arranging path using an existing flat wire, and at the same time, a wire It is an object of the present invention to realize a wiring method that improves the quality of harnesses, manufacturing efficiency, and workability in assembling into a vehicle.

[0009]

In order to achieve the above-mentioned object, the invention according to claim 1 is a wire for arranging a flat wire having a plurality of parallel electric wires formed in a plane in a desired path. In the method for arranging a harness, the flat wire is twisted in a spiral shape at least at a portion where the wire harness is bent and arranged.

Further, the invention of claim 2 is a wire harness arranging method for laminating a plurality of flat wires in which a plurality of parallel electric wires are planarly formed and arranging the flat wires in a desired route. It is characterized in that a spiral-shaped twist is applied to desired portions except both ends of the wire. With such a configuration, in the invention of claim 1, since the flexibility of bending the flat wire is improved, the flat wire can be applied to a routing route where the flat wire has not been used, and the wire harness can be applied to a vehicle. Assembling work efficiency is improved.

Further, in the invention of claim 2, since the portion other than the end of the electric wire to be connected to the connector is spirally twisted, the bending flexibility of the entire wire harness is improved, and the work efficiency of assembling to the vehicle is further improved. As the height increases, the stacked flat wires come into close contact with each other due to the spiral twist, and thus the tape binding work for closely fixing the flat wires to each other is omitted.

Further, since the flat wire harness can be partially made into a convergent shape by the installation method of the present invention, it is possible to cope with more various installation routes.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The wire harness arranging method of the present invention will be described in detail below with reference to embodiments. First, an example of a good flat wire applied to the wire harness arranging method of the present invention will be described with reference to FIG.

In FIG. 1A, the flat wire 1
Is a wire welding portion 3 in which a plurality of parallel electric wires 2 are arranged in a plane and the arranged electric wires 2 are fixed at a predetermined interval.
And an electric wire separating portion 4 in which the electric wires 2 are separated from each other. Such a flat wire 1 is commercially available as a partially welded product. As shown in FIG. 1B, such a flat wire 1 is rotated once in the wire separating portion 4,
Alternatively, the spiral twisted portion 5 is formed by half rotation. That is, in the electric wire separating portion 4, since the electric wires 2 are separated from each other and independently exist, no restraining force acts on the twist and a spiral shape can be favorably formed.

Next, FIG. 2 shows a first embodiment of the wire harness arranging method according to claim 1 of the present invention. In FIG. 2, when a wiring route is defined from the lower portion of the door mounting portion 11 of the vehicle body 10 toward the vehicle bottom frame 12, a flat wiring portion such as the lower portion of the door mounting portion 11 or the vehicle bottom frame 12 is flat. The wire 1 is normally planarly routed, and a spiral twisted portion 5 is formed in the flat wire 1 at a portion where bending and routing between these straight wiring locations is required.

By forming the twisted portion 5, the flat wire 1 can have a bending degree of freedom in any direction. That is, by forming the twisted portion 5, the cross-sectional shape of the wire harness is changed from a rectangular shape to a round shape having a hollow portion, and the diameter of this round shape, that is, the area of the hollow portion is changed, so that bending flexibility is generated. With such a wire harness installation method, at the straight installation location, the characteristics of the flat wire can be utilized to make the installation cross section thin, and at the bending installation location, the bending angle can be freely set. Therefore, the present invention can be applied to a movable portion such as a door portion and a vehicle body where a flat wire cannot conventionally be used, and the workability of assembling the vehicle can be improved.

Further, since the advantage that the terminal crimping can be automated can be utilized for the connector connected to both ends of the flat wire, the manufacturing efficiency of the wire harness can be improved. Further, in a speaker circuit conventionally provided in a cabin or a door portion, a method of canceling noise by a twisted wire called a so-called twisted pair wire has been implemented. The wiring method in which the spiral twisted portion of the present invention is formed as the wiring of an electronic device which is easily affected can be effectively applied.

Next, FIG. 3 shows a second embodiment of the wire harness arranging method according to claim 2 of the present invention. FIG.
In (a), the flat wires 1 and 1'are shown in FIG.
Similar to the flat wire 1 shown in Fig. 2, a plurality of parallel electric wires 2 are arranged in a plane, and the electric wire welding portions 3 and the electric wires 2 to which the electric wires 2 to be arranged are fixed at predetermined intervals are mutually connected. It has the electric wire separating part 4 which separates. Two sets of the flat wires 1 and 1'are laminated to form the spirally twisted portion 5. Here, the flat wire 1 of the upper layer and the flat wire 1'of the lower layer are laminated so that the electric wire welding portions 3 and the electric wire separating portions 4 are at the same position. As described with reference to FIG. 1, since the electric wires 2 are separated and independently exist in the electric wire separating portion 4, no restraining force acts on the twisting and a good spiral shape is formed. The flat wires 1 and 1 ′ can have a bending degree of freedom in any direction.

Further, since the flat wire of the upper layer and the flat wire of the lower layer are brought into close contact with each other by having such a spiral twisted portion 5, it is not necessary to bind the flat wires to each other with a tape. Therefore, by twisting in a spiral shape other than the wire end part where the connector is connected,
Tape bundling work in the wire harness manufacturing process can be omitted or greatly reduced.

In this embodiment, the door mounting portion 1 of the vehicle body 10
An example applied to the lower part of FIG. 1 is shown in FIG. Here, a spiral twist is applied to the flat wires 1 and 1 ′ except for the connector 6 connection portion A and the wire harness branch B. Next, FIG. 4 shows a third embodiment of the wire harness arranging method according to claims 1 and 2 of the present invention.

In this embodiment, the vehicle body 10 and the door portion 13 are provided.
It relates to a wire harness provided between and. Since a drive system for the power window and the door mirror and a window storage space are secured in the door portion 13, the wiring harness wiring space is very narrow. Normally, between the vehicle body 10 and the door portion 13,
A wire harness in which electric wires are bundled with a binding tape is used, but inside the door, it is flattened so that the wiring cross section is thin. In this embodiment, the flat wire 1 is used from the vehicle body 10 to the inside of the door portion 13,
The spiral twisted portion 5 can be formed only in a portion that is movable by opening and closing the door portion 13, so that the flexibility of bending can be increased, and the vehicle body 10 and the door portion 13 can be increased.
In the inside, it can be made flat and the installation section can be made thin.

As described above, since the flat wire can be used even in the places where the wire harness using the flat wire cannot be routed, the degree of freedom in designing the wire harness can be improved.
It is possible to deal with more diverse routing routes. In addition, since the spiral twist, which is a feature of the present invention, may be applied at the time of manufacturing the wire harness or may be applied at the time of assembling to the vehicle, even in the case of installation in a narrow wiring route which is a blind work. Since the degree of freedom can be increased, workability can be improved.

In each of the above-mentioned embodiments, the partially welded product is used as the flat wire 1, but the present invention is not limited to this form, and the electric wires 2 are evenly arranged. It may be a whole welded product that is welded to. In the case of the whole welded product, resistance may occur when forming the twisted portion 5, but the flat wire 1 formed by the arrangement of the sufficiently thin electric wires 2
Or a flat wire 1 with a small number of wire arrangements,
There is no problem. Further, it can be said that the present invention can be favorably applied to the present invention even if the electric wire 2 is arranged in a flat shape only at the electric wire end to which the connector 6 is connected and the other portions are terminal flat electric wires in which the electric wires 2 are separated from each other. There is no end.

[0024]

As described above, according to the first aspect of the present invention, the flexibility of bending of the flat wire is improved by forming the spiral twisted portion in the flat wire at the place where the bending wiring is required. Therefore, the flat wire can be applied to the routing route where the flat wire has not been used, and the efficiency of the work of assembling the wire harness to the vehicle can be improved.

According to the second aspect of the invention, since the spiral twisted portion is formed in addition to the wire end to which the laminated flat wire connectors are connected, the flexibility of bending of the wire harness as a whole is improved and the vehicle is It is possible to further improve the efficiency of assembly work to
Since the stacked flat wires are in close contact with each other due to the spiral twist, it is possible to omit the tape binding work for closely fixing the flat wires.

Further, since the flat wire harness can be partially converged by the installation method of the present invention, it can be applied to more various installation routes.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a flat wire applied to a method for installing a wire harness according to the present invention.

FIG. 2 is a diagram showing a first embodiment of a wiring harness wiring method according to the present invention.

FIG. 3 is a diagram showing a second embodiment of the wiring harness wiring method according to the present invention.

FIG. 4 is a diagram showing a third embodiment of the wiring harness wiring method according to the present invention.

FIG. 5 is a diagram illustrating a problem of a flat wire in a conventional wire harness installation method.

FIG. 6 is a diagram showing a conventional wire harness installation method.

FIG. 7 is a diagram illustrating a problem in the case where flat wires are stacked in a conventional wiring method for a wire harness.

[Explanation of symbols]

 1, 1'Flat wire 2 Electric wire 3 Electric wire welding part 4 Electric wire separating part 5 Twisted part 6 Connector 7 Folding part 10 Vehicle body 11 Door attachment part 12 Vehicle bottom frame 13 Door part

Claims (2)

[Claims] 1. A wire harness arranging method for arranging a flat wire having a plurality of parallel electric wires formed on a plane in a desired path, at least at a portion where the wire harness is bent and arranged. A method for arranging a wire harness, which comprises twisting the flat wire in a spiral shape. 2. A wiring harness arranging method for laminating a plurality of flat wires in which a plurality of parallel electric wires are formed in a plane in a plurality of layers and arranging the flat wires in a desired route, wherein both ends of the flat wire are excluded. A wiring harness arranging method, characterized in that a spiral-shaped twist is applied to the location.