JP3500672B2 - Wire harness - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire harness for an automobile, and more particularly, to protect an electric wire for an important circuit and to notify the occurrence of an abnormality.

[0002]

2. Description of the Related Art Generally, a wire harness WH for an automobile is used.
Is a large number of electric wires a, as shown in FIGS.
b, ... Are bundled and bound by the binding tape 1. Each of the electric wires a, b, ... Contains an important circuit electric wire a and a general circuit electric wire b, but the important circuit electric wire a is a wire harness so that an abnormality such as a short circuit or a disconnection does not easily occur. WH
It is preferable to locate it at the center of the cross section of.

[0003]

A wire harness is inserted from above into an electric wire insertion portion of a wiring jig projecting on a wiring drawing board, and the inserted electric wire group is bundled by tape winding and formed. Therefore, it is very difficult to position the important circuit wire a at the center of the wire harness WH. When the important circuit is composed of the thick electric wire a, the electric wire a has a high probability of appearing on the surface (outer periphery) of the electric wire group due to its rigidity. When the important circuit electric wire a is present on the surface of the wire harness WH, it easily interferes with the edge of the metal bracket 2 protruding from the vehicle body panel or the like when the electric wire a is placed in the automobile. In that case, due to the interference, first, the tape that focuses the outer peripheral surface of the electric wire group is torn and broken, and then the important circuit electric wire is brought into contact with the edge, and an abnormality such as a short circuit or a disconnection is likely to occur.

Incidentally, as shown in FIG. 8, in an important circuit in which the electric wire a between the battery 3 and the distribution box 4 is protected by the fusible links 5 and 5, until an abnormality such as a momentary interruption current due to chattering occurs. Since the fusible links 5 and 5 do not melt, the wire harness W
The H may be burnt.

The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a wire harness that protects the electric wires for important circuits and can notify the occurrence of an abnormality.

[0006]

In order to achieve the above object, the present invention provides a wire harness for an automobile, which is composed of an electric wire group consisting of an electric wire for an important circuit and an electric wire for a general circuit. In the protection section facing the edge of the metal bracket in the state of being routed along the wire, one alarm circuit wire is specified on the outer circumference of each of the above important circuit wires or on the outer circumference where a plurality of important circuit wires are put together. The wire is characterized in that it is spirally wound at a pitch, and the alarm circuit electric wire is spirally wound around the important circuit electric wire, and the other electric wire for general circuit is bundled and tape-wound. We provide harnesses.

As described above, one alarm circuit wire may be wound around one important circuit wire, or a plurality of weight circuit wires may be bundled together and one alarm circuit wire may be wound around the outer peripheral surface. You may wind the wire for the alarm circuit.

Further, the alarm circuit wire is connected to an alarm means, and when the alarm circuit wire has an abnormality such as a short circuit or a disconnection, it is displayed by the alarm means.

[0009]

According to the present invention, the alarm circuit wire is spirally wound around the protection section of the important circuit wire at a predetermined pitch, so that the alarm circuit wire is bundled together with the general circuit wire for bundling. Even if the important circuit wire is exposed on the surface of the wire harness WH when it is bound with tape, the alarm circuit wire first interferes with the edge of the metal bracket of the car, causing abnormalities such as wear → short circuit → disconnection. Therefore, the electric wire for the important circuit comes to be protected.

Further, when an abnormality such as a short circuit or a disconnection occurs in the alarm circuit wire, the alarm lamp of the alarm circuit is turned on, so that the abnormality of the important circuit wire can be notified.

[0011]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. As shown in FIG. 1 and FIG. 2, an alarm circuit is provided on the outer periphery of a section of the electric wire a for an important circuit such as an automobile power source to be protected, for example, a section facing the edge of the metal bracket 2 when wiring is performed The electric wire c is spirally wound at a predetermined pitch P (for example, 10 mm or less). As a result, the outer periphery of the important circuit wire a is covered with the alarm circuit wire c.

As shown in FIG. 3, the alarm circuit electric wire c is wound around the important circuit electric wire a as described above.
It is bundled together with the general circuit electric wire b and is bound with the binding tape 1. In this case, connect the important circuit wire a to the wire harness W.
It does not necessarily have to be located at the center of H and may be exposed on the surface.

In the above wire harness WH, it is important that the important circuit wire a interferes with the edge of the metal bracket 2 or the like.
Since the alarm circuit electric wire c is provided earlier, the important circuit electric wire a is protected.

As shown in FIG. 4, the alarm circuit wire c wound around the important circuit wire a is connected to the alarm unit 7 from the battery 3 through the protective fuses 6 and 6. Then, when the alarm circuit electric wire c interferes with the edge of the metal bracket 2 or the like to cause an abnormality such as wear → short circuit → disconnection, the alarm unit 7 detects the abnormality, and the warning lamp 8 lights up. It will inform the driver of the abnormality. As a result, it is possible to give advance notice of the occurrence of an abnormality in the important circuit electric wire a, so that the risk of burning or the like of the wire harness WH can be prevented.

Although the alarm circuit is separately provided in the above embodiment,
An existing electrical system that allows the driver to easily detect an abnormality while traveling may be used. For example, as shown in FIG.
Automotive back lamps 9a, 9b and back buzzer 10
Wire between the back switch 11 and the back switch 11
In this case, the back lamps 9a and 9b do not light up or the back buzzer 10 does not sound, so that the driver is notified of the abnormality, so that the abnormality occurrence of the important circuit electric wire a can be notified.

When there are a plurality of important circuit electric wires a, the alarm circuit electric wire c is used as a binding material for the plurality of important circuit electric wires a, so that the alarm circuit electric wire c has an alarm function and a bundling function. You can have both.

[0017]

As is apparent from the above description, in the automobile wire harness of the present invention, the alarm circuit wire is spirally wound around the outer periphery of the protection section of the important circuit wire at a predetermined pitch. This protects the critical circuit wire, and when an abnormality such as a short circuit or disconnection occurs in the alarm circuit wire, the warning light of this alarm circuit is turned on to cause an error in the critical circuit wire. It has the advantage that it can be announced.

[Brief description of drawings]

FIG. 1 is a perspective view in which an electric wire for an alarm circuit is wound around an electric wire for an important circuit.

FIG. 2 is a front cross-sectional view of the electric wire of FIG.

FIG. 3 is a sectional view of the wire harness of the present invention.

FIG. 4 is a circuit diagram of a first embodiment of an alarm circuit.

FIG. 5 is a circuit diagram of a second embodiment of an alarm circuit.

FIG. 6 is a perspective view in which a warning circuit wire is wound around a plurality of important circuit wires.

FIG. 7A is a perspective view of a conventional wire harness,
(B) is a sectional view of (A).

FIG. 8 is a circuit diagram of an important circuit protected by a conventional fusible link.

[Explanation of symbols]

WH wire harness a Important circuit wire b Electric wire for general circuit c Alarm circuit wire 8 warning lights 9a, 9b Back lamp 10 back buzzer 11 switch

Claims (2)

(57) [Claims] 1. An electric wire for an important circuitAnd the electric wire for the general circuit
A wire harness for automobiles that consists of
There Install the metal bracket with the cable installed along the vehicle body panel.
For each of the above important circuits in the protection section facing the bridge, etc.
The outer circumference of the wire or multiple important circuit wires are grouped together
One alarm circuit wire is spirally wound around the outer periphery at a specified pitch.
Tighten it and screw the alarm circuit wire to the important circuit wire.
A spirally wound one with other general circuit electric wires
Bundle and wind with tape Wire harness characterized by
Ness. 2. The alarm circuit wire is connected to an alarm means.
However, there is a short circuit or break in the alarm circuit wire.
A structure for displaying with an alarm means when it occurs
The wire harness described.