JP2000095043A - Wire harness for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of wires by providing a first wire harness which reaches from a dash panel to the in-room side, is divided to right and left sides, and is connected to switches around a steering wheel and a power supply side of a cowl side, and a second wire harness which is connected to a load side and extends to a rear door, in wiring in an engine room. SOLUTION: A first wire harness 10 is passed through a through-hole 13 in a dash panel P from an engine room side to an in-room side, and is divided right and left on the in-room side, and its branch wire 10b-1 on the right side of wiring is connected with switches S1 and a meter M around a steering wheel H. A branch wire 10b-2 on the left side of wiring is connected with a power supply side of a circuit in a left junction box 15. The through-hole 13 in the dash panel P reduces branch lengths of the branch wires 10b-1, 10b-2 and can be used by either of a right-hand drive vehicle and a left-hand drive vehicle. The second wire harness 11 is connected to the load side of a circuit in a junction box 15 and extends to right and left rear doors. Thus, cut places of the wires can be greatly reduced, and the number of the wires can be reduced.

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 a motor vehicle, and more particularly to reducing the number of electric wires to be laid on the entire motor vehicle and improving the assemblability of the wire harness to the motor vehicle.

[0002]

2. Description of the Related Art Generally, a wire harness routed to an automobile includes a front harness routed in an engine room, a cowl harness routed along a dash panel, and an instrument panel harness routed in an instrument panel. This is divided into a floor harness, a rear harness, a roof harness, left and right door harnesses, and the like.

[0003] In this manner, the wiring harness to be routed to the automobile is divided according to the routing area (area), and the electric wires routed beyond the area are also divided for each area to form each wiring harness. I have. Therefore, the number of electric wires is increasing more than necessary, and it is necessary to connect these cut electric wires to each other with a connector, which increases the number of parts and the number of operations.

Further, even in the same vehicle type, wire harnesses must be formed according to four types of right-hand drive vehicle, left-hand drive vehicle, sedan type and van type. There's a problem.

In order to solve the above-mentioned problem, the applicant of the present invention has proposed in Japanese Patent Application Laid-Open No. 9-254721 previously proposed a wire harness for automobiles in which the number of wire harnesses is reduced and vehicle types are shared. . That is, as shown in FIG. 5, an integrated harness 1 in which a floor harness and a rear harness are integrated and an integrated harness 2 in which a cowl harness and an instrument panel harness are integrated are provided to reduce the number of wire harnesses. Further, the integrated harness 1 and the front harness 3 are shared by four types of vehicles, and the integrated harness 2 is different between right-hand drive vehicles and left-hand drive vehicles.

[0006]

However, since the integration 2 of the cowl harness and the instrument panel harness and the front harness 3 are divided, the electric wire that can be connected from the front harness to the cowl harness or the instrument panel harness is also cut. Therefore, there is a problem that work such as an increase in the number of electric wires, a terminal connection to an electric wire terminal, and a connector connection increases, and the number of required parts increases, resulting in an increase in cost. In particular, the front harness includes a power supply line connected to a battery mounted in the engine room, and it is preferable that the power supply line be cut as much as possible and not connected to a connector in order to reduce electric resistance. In addition, when the cowl harness and the instrument panel harness are integrated, there is a problem that the number of wires and the number of components attached to these wires are large, so that the wire harness becomes large and is difficult to be attached to an automobile.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has been made by dividing a wire harness into a size that does not degrade the ease of manufacturing and assembling to a vehicle, and that can be continued with one electric wire. The object of the present invention is to divide a wire harness so as not to cut it as much as possible, thereby reducing the number of electric wires.

[0008]

In order to solve the above-mentioned problems, the present invention is arranged in an engine room, extends from a through hole provided in a dash panel to the indoor side, and separates left and right on the indoor side. One is connected to an ignition switch, a combination switch, etc. around the steering wheel, and the other is a first wire harness consisting of a group of wires connected to a power supply side of a circuit in a junction box arranged on a cowl side; A vehicle connected to a load side of an internal circuit, arranged along the interior side of the dash panel, and provided with a second wire harness including a group of electric wires extending to the vicinity of right and left rear doors. We supply wire harnesses.

In the above configuration, the electric wire group conventionally bundled as the cowl harness is divided into the first wire harness and the second wire harness. That is, among the conventional cowl harnesses, a wire group that is continuous on the circuit without passing through the front harness and the relays and switches, and a wire group that is connected to the power supply side of the circuit in the junction box are incorporated in the first wire harness. I have. On the other hand, among the conventional cowl harnesses, a group of electric wires connected to the load side of the junction box is incorporated in the second wire harness.
As described above, since a part of the electric wire group forming the conventional cowl harness is connected to the electric wire group on the engine room side, the amount of electric wires to be inserted through the through holes of the dash panel can be suppressed. Can be routed to the indoor side through the through hole, and the first wire harness can be easily taken to the automobile.

As described above, in the conventional cowl harness wire group, the wires that are continuous on the circuit without the intervention of relays, switches, etc., are continuous without being divided, and extend from the engine room side to around the handlebar on the indoor side. As a result, the number of electric wires can be reduced as compared with the case of dividing and assembling as another wire harness (a front harness and a cowl harness). In addition, the power line connected to the battery in the engine room is routed from the engine room side to the room side, and connected to the ignition switch, the combination switch attached to the steering shaft, etc., and connected to the junction box, Since the wires are not divided, the length of the power supply line can be minimized, the electric reliability of the power supply line can be improved, and the use amount of the large-diameter electric wire can be reduced.

As described above, the second wire harness does not belong to the first cowl harness among the conventional cowl harnesses, and is a group of wires connected to the load side of the circuit in the junction box; , And a group of electric wires connected on a circuit without a relay or the like and extending to the rear door side. Thus, by extending to the rear door side, for example, the electric wire connected to the side airbag can be directly connected to the junction box, and the electric reliability can be improved. Conventionally, the cowl harness and the wire harness extending to the rear door side are divided and connected by a connector, but by continuing this without dividing, the number of electric wires is reduced, and parts and components for connector connection are reduced. The number of operations can be reduced.

[0012] is connected to the load side of the circuit in the junction box, extends along the floor to the rear side,
A third wire harness connected to electrical components installed on the floor and the rear side is also provided. This third wire harness is a wire harness obtained by integrating a conventional floor harness and a rear harness. Thus, by integrating the floor harness and the rear harness, it is possible to reduce the number of wire harnesses to be assembled in the automobile. The third wire harness also includes the first wire harness and the second wire harness.
Like the wire harness, it can be used commonly for right-hand drive cars and left-hand drive cars.

The wire harness routed to the indoor side along the dash panel is a part of the first wire harness,
It comprises a part of the second wire harness and the instrument panel harness. That is, conventionally, there were two types of wire harnesses arranged between the dash panel and the instrument panel, namely, a cowl harness and an instrument panel harness. . However, the first wire harness and the second wire harness along the dash panel
Since the wire harness is obtained by dividing the conventional cowl harness, the number of electric wires is small, and therefore, it is easy to handle each. Therefore, it is possible to easily attach the wire harness to a place where attachment between the dash panel and the instrument panel is difficult.

A through hole provided in the dash panel for passing the first wire harness from the engine room side to the room side is provided at a position where a group of electric wires routed inside the suspension tower in the engine room passes straight. The length of the electric wire that passes through the through hole and goes out to the indoor side to be divided into right and left is shortened, and is used commonly for right-hand drive vehicles and left-hand drive vehicles.

That is, it is closer to the center of the vehicle than the through holes provided in the conventional dash panel. Therefore, the length of the electric wire group divided into right and left after exiting the room through the through hole can be reduced. For example, if the through hole is provided at a position slightly closer to the center side than the position of the left suspension tower, and the length is set to extend to the right handle position, large double filing occurs in the case of a left-hand drive vehicle. It can be routed to the left steering wheel position without being used, and can be used commonly for left and right steering wheel vehicles.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, a wire harness to be routed to an automobile is connected to a first wire harness 1.
0, second wire harness 11, third wire harness 12
Are roughly divided into three types.

The first wire harness 10 is formed by integrating a part of a conventional cowl harness and a front harness. The first wire harness 10a is arranged in an engine room (X) and a room for a dash panel P is provided. Inside (Y)
The first wiring harness 10 comprises an indoor first harness 10b composed of a part of a group of electric wires of a cowl harness routed along.

The first wire harness 10 passes through the through hole 13 formed in the dash panel P from the engine room (X) side to the room (Y) via the grommet 19 and branches right and left on the room (Y) side. In the illustrated right-hand drive vehicle, the branch line 10b-1 routed to the right is connected to the ignition switch S1 around the handle H, the combination switch S1 in the steering shaft, the meter M, and the like. Also, the branch line 10b-2 routed to the left is connected to the power supply side of the circuit in the junction box 15 arranged on the left cowl side.

The through hole 13 provided in the dash panel P
Is opened at a position corresponding to a position between the mounting position of the battery 16 and the left suspension tower 17, and is located closer to a position of a wire harness through hole 13 ′ (shown by a dashed line in FIG. 3) provided in a conventional dash panel. It is close to the center. This shortens the branch length of the branch lines 10b-1 and 10b-2. Further, the first wire harness 10 can be shared by a right-hand drive vehicle and a left-hand drive vehicle by being located closer to the center than the position of the through hole 13 ′.
-1 is not routed to the right, but is routed around the left steering. Note that the junction box 15 is arranged on the left cowl side in both the right-hand drive vehicle and the left-hand drive vehicle, and therefore is routed to the left.

The electric wire group constituting the first wire harness 10 is mainly composed of a raw power supply line connected to the battery 16 and having no switch or relay interposed (partly through the fuse box 18). Raw power lines need to minimize electrical resistance and interference. Therefore, as in the present invention, it is preferable that the wires are connected continuously without being divided between the engine room side and the indoor side, and when the wires are divided, the number of wires increases, so the wires are divided. Without this, the number of electric wires is reduced.

The second wire harness 11 is a group of wires other than the conventional cowl harness except the indoor first harness 10b of the first wire harness 10, and is connected to the load side of the circuit of the junction box 15. Dash-side second harness 11a, and both side-side second harnesses 11b and 11c extending to the left and right rear doors. The dash-side second harness 11a is connected to the junction box 15 as described above, and a part of both left and right ends thereof is connected to the front door-side wire harness 22. The electric wire connected to the door wire harness branches to form second side harnesses 11b and 11c on both sides, and extends to the rear door side to be connected to the rear door wire harness 23.

The both side second harnesses 11b, 11b
Among the group of wires c, there is also a wire having one end connected to the junction box 15 and extending to the rear door side. Among these electric wires, some electric wires of the right side second harness 11 b are connected to the side airbag 20. Therefore, the circuit to the side airbag 20 is the junction box 1
5 is directly connected to the connector 5 without interposing a connector, a relay or the like, so that reliability can be improved.

The third wire harness 12 is obtained by integrating a conventional floor harness and a rear harness. The power supply side is connected to a junction box 15, and the load side is connected to a rear auxiliary device such as a rear lamp. I have. In the case of a vehicle having a back door, if there are many auxiliary devices in the back door, it is preferable to connect the wire harness for the back door to the roof harness.
It may be connected to the wire harness 12. .

In addition to the first wire harness 10, the second wire harness 11, and the third wire harness 12, the same instrument panel harness 21, roof harness, and door harness as those of the related art are provided and routed to the automobile. Therefore, the first wire harness 1 is located on the indoor side along the dash panel P.
0 indoor harness 10b and the second wire harness 11
Dash side harness 11a and the instrument panel harness are wired in parallel.

The first, second, and third wire harnesses 10, 11, and 12 having the above-described configuration are a right-hand drive vehicle shown in FIG.
It can be used in common with the left-hand drive vehicles shown in the figure.
That is, in the case of a left-hand drive vehicle, the only difference from the right-hand drive vehicle is that the branch first harness 10b-1 that is routed around the handle of the first wire harness 10 is routed around the handle located on the left side. It is. In this case, since the position of the through hole 12 provided in the dash panel P is closer to the center, the branch length of the branch first harness 10b-1 is relatively short, so that the first harness 10b branches to the left handle.
Even if -1 is routed, no large doubling occurs,
Can be routed.

[0026]

As is evident from the above description, in the automotive wiring harness of the present invention, those that are continuous on the circuit without the intervention of switches, relays, etc., are connected as much as possible without breaking the electric wires. The wiring harness is configured so that it can be used. In other words, conventionally, the wiring harness is configured by the wiring area, and when the area is different, the electric wire connected on the circuit is also divided. However, in the present invention, even if the area is different, it is necessary to connect the wiring on the circuit. A certain electric wire is configured to be incorporated into one wire harness without being divided. Therefore, the number of electric wires can be significantly reduced, and the number of electric wires can be reduced accordingly.

When an electric wire is cut, it is necessary to connect the cut electric wire to a connector, which requires parts such as a connection terminal and a connector, and also requires a lot of assembly work.
On the other hand, if the electric wires are continuously connected without being divided, the above-mentioned components can be reduced and the number of assembling steps can be eliminated. Also, rather than cutting the wire, the continuous wire, the required wire length is also shorter, reducing the required wire volume,
Cost and weight can be reduced.

Further, in the present invention, a so-called raw power supply line, which is connected to a battery and is connected without a switch or a relay, is drawn out from the engine room side through the through hole of the dash panel to the indoor side, and is connected to the junction box. It is directly connected to the power supply side of the internal circuit, and is also connected to the ignition switch, combination switch, etc. around the handle. Therefore, as compared with the related art in which the power supply line is also divided as the floor harness and the cowl harness, the power supply line can be shortened, electric resistance and interference can be reduced, and the electric reliability of the power supply line can be improved.

Further, a through hole for passing the first wire harness from the engine room side to the room side is provided near the center of the dash panel, and the length of the branch line which is divided into left and right on the room side is shortened. It can be used for both a steering wheel car and a right steering wheel car, and the type of wire harness can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an embodiment of the present invention.

2A is a schematic diagram showing a wiring position of a first wire harness, FIG. 2B is a schematic diagram showing a wiring position of a second wire harness, and FIG. 2C is a schematic diagram showing a wiring position of a third wire harness; FIG.

FIG. 3 is a schematic diagram showing a wire harness routed along a dash panel.

FIG. 4 is a schematic diagram of a case where the vehicle is routed to a left-hand drive vehicle.

FIGS. 5A and 5B are schematic diagrams showing a conventional example.

[Explanation of symbols]

 Reference Signs List 10 first wire harness 11 second wire harness 12 third wire harness 13 through hole 15 junction box 16 battery 17 suspension tower

Claims (4)

[Claims] Claims 1. An engine room, which is routed to a room through a through hole provided in a dash panel, is divided into left and right sides on the room side, and one is connected to an ignition switch, a combination switch, etc. around a steering wheel. And the other is a first wire harness composed of a group of wires connected to the power supply side of the circuit in the junction box disposed on the cowl side, and connected to the load side of the circuit in the junction box, and the indoor side of the dash panel And a second wire harness composed of a group of electric wires extending near the left and right rear doors. 2. A circuit connected to a load side of a circuit in the junction box and extending along a floor to a rear side,
The vehicle wiring harness according to claim 1, further comprising a third wiring harness connected to electrical components installed on the floor and the rear side. 3. A wiring harness routed on the indoor side along the dash panel, wherein a part of the first wire harness is provided.
The automobile wire harness according to claim 1, comprising a part of the second wire harness and an instrument panel harness. 4. A through hole provided in a dash panel for passing the first wire harness from an engine room side to a room side is a position through which a group of electric wires routed inside a suspension tower in an engine room is linearly penetrated. 4. The vehicle according to any one of claims 1 to 3, wherein the length of the electric wire which passes through the through-hole and goes out of the room to the left and right is shortened, and is used commonly for a right-hand drive vehicle and a left-hand drive vehicle. 4. The automotive wiring harness according to claim 1.