JPH08251755A - Wire harness for vehicle - Google Patents

Abstract

PURPOSE: To easily deal with a design change and to eliminate the splice of a wire. CONSTITUTION: The wire harnesses for a vehicle respectively comprise a plurality of junction boxes 10A to 10E having internal circuits of an electric component unit or an electrical system unit, main lines 20A to 20E wired between the boxes, branch lines 30A to 30P wired between the boxes and the components. The internal circuits of the boxes have branch circuits for distributing all the powers and signals, and through circuits for connecting the internal circuits of the other boxes to each other and the internal circuits of the other boxes to the components. The wires of wire groups for forming the main and the branch lines are all formed of single wires without branching, the main and branch lines are respectively mounted at the ends of the groups with connectors, and connected all to the boxes by the connectors.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle wire harness and, more particularly, to selecting and using required parts for different vehicle types or different grades and destinations of the same vehicle type. By making it possible, the wire harness can be shared as much as possible, and the wire harness can be automatically assembled.

[0002]

2. Description of the Related Art Conventionally, in a wire harness for a vehicle, a wire harness for one vehicle is divided into a plurality of blocks, and each block is designed and manufactured integrally. That is, one block of the wire harness W / H as shown in FIG. 7 is formed on the wire harness assembly drawing board, and, for example, the wire group of the main line 2 laid between the main junction boxes 1A and 1B at both ends. To the required electric wire by splicing to provide a large number of branch lines 3 and connecting the connector 5 or the sub junction box 1C to these branch lines 3 to assemble the branch line 4 to the branch line 3 by splice connection. It is provided and the wires are spliced in an octopus way.

In the wire harness assembled as shown in FIG. 7, the wire harness W / H is different when the vehicle type is different, or even in the same vehicle type because of the destination and grade.
If there is any difference in some part of the above, it is necessary to design, manufacture and manage as a wire harness as a separate component, which causes a problem of cost and labor.

In order to solve the above problem, as shown in FIG. 8, all the terminal parts connected to the electrical equipment are separated, and the connector 5 is attached to the terminal of the separated branch line 3 and branch line 4 from the branch line 3, There is provided a connector 6 attached to an electric wire terminal connected to each electric component, and a connector 6 connected as necessary.

[0005]

However, in the wire harness shown in FIG. 8, the number of connectors for connection is very large, the number of parts is increased, and a large number of connector connection portions occupy space and cost. At the same time, the assembly work becomes complicated. In addition, it is necessary to take waterproof, dustproof and noise protection measures at the connector connection part.

Further, the wire harness W / H shown in FIG. 8 is designed and manufactured integrally for each block in the same manner as the wire harness W / H shown in FIG. 7, and only the electrical components to be connected can be selected. Therefore, if the design of the entire block needs to be changed, for example, if the design of the wire harness trunk or junction box needs to be changed, it is necessary to separately design and manufacture the wire harness. is there.

Further, the wire harness W / H shown in FIG.
As shown in the connection diagram of FIG. 9, the splice portion 7 connecting the electric wires remains, which makes it extremely difficult to automate the wire harness assembly. Furthermore, since the trunk line of the wire harness of FIG. 8 is similar to the trunk line of the wire harness of FIG. 7, in order to assemble these wire harnesses,
There is a problem that a large wire harness assembly drawing board is required and a large space is required for assembly of the wire harness.

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned conventional problems, and the wire harnesses conventionally manufactured as one block have different destinations and different grades even if the vehicle types are different or the same vehicle type. If the electrical components to be installed are different, it is possible to easily cope with them, and it is possible to share a wide range. Moreover, the splice of the electric wire is eliminated, and the wire harness can be automatically assembled. The purpose is to be able to assemble the harness in a small space.

[0009]

To achieve the above object, according to the present invention, in claim 1, a plurality of junction boxes having an internal circuit of an electric component unit or an electric component system unit, and wiring between these junction boxes are provided. The wire harness trunk line and the wire harness branch line for wiring between the junction box and the electrical components are provided separately, and the internal circuit of the junction box distributes all power and signals in units of electrical components or units of electrical components. A branch circuit to perform and the internal circuit of the other junction box, and the through circuit for connecting the internal circuit of the other junction box and the electrical equipment are provided.
The junction box is provided with a connector accommodating portion for connecting the internal circuit to the wire harness trunk line and the wire harness branch line, and each wire of the wire group forming the trunk line and the branch line is a single wire without branching. For the harness trunk line and the wire harness branch line, attach a connector to each end of the wire group, and select the above junction box, wire harness trunk line, or wire harness branch line according to the difference in vehicle model or grade in the same vehicle model. A wire harness for a vehicle is provided in which the connectors of the selected wire harness trunk line and wire harness branch line are fitted and assembled in the connector housing portion of the selected junction box.

The junction box is provided with a connector accommodating portion for connecting to another junction box via the wire harness main line and a connector accommodating portion for connecting to electrical equipment via the wire harness branch line. (Claim 2)

The wire group constituting the wire harness main line and the wire harness branch line is made up of a single wire having a core wire covered with an insulating coating or / and a flat wire having a conductive material such as a copper foil sandwiched between insulating sheets. Good.
Further, the internal circuit of the junction box may be composed of an FPC (flexible printed circuit), a PCB (printed circuit board), or the like, or may be composed of an electric wire and a pressure contact terminal which is in pressure contact with the electric wire.

[0012]

In the wire harness for a vehicle according to claim 1,
In advance, select all the electrical components required for each block, divide all of these electrical components into electrical component units or electrical component system units, and distribute power and signals in these electrical component units or electrical component system units. All the junction boxes are designed so that the internal circuits can be used, and a plurality of junction boxes having the internal circuits are formed in advance. In addition, these junction boxes are formed with a required connector accommodating portion in order to make all the connections with the external circuit into the connectors. On the other hand, the wire harness main line connecting the junction boxes to each other and the wire harness branch line connecting the junction box to the connector are configured by a single wire group having no splice part in each wire, and each single wire of these wire groups. The terminals are attached to both ends of the electric wire, and the connectors accommodating these terminals are attached to the wire harness trunk line and the wire harness branch line to be formed. In this way, the wire harness trunk line, which was conventionally one, is also divided and formed, and the connectors are attached to both terminals of the divided wire harness trunk lines, and if necessary, the connector is connected to the required junction box. , The required junction boxes are connected together.

A large number of junction boxes, wire harness trunk lines, and wire harness branch lines, which are formed in advance as described above, are selected and used according to the required electrical components, and are assembled together by connector connection to form one block. The main wire harness. That is, by connecting the junction boxes formed in units of electrical components or units of electrical components to each other by the divided wire harness trunk lines, it is possible to easily form a wire harness corresponding to different electrical components.

According to a second aspect of the present invention, the junction box is provided with a connector for connecting to another junction box via the wire harness main line and a connector for connecting to an electric wire product via the wire harness branch line. All terminals that are connected to electrical equipment can be directly connected to the junction box because the distribution of power and signals to each terminal is done by the junction box. That is,
There is no need to branch the circuit by splicing the branch electric wire to the electric wire of the wire harness main line as in the conventional case. As described above, the absence of the splice connection portion enables automatic assembly of the wire harness.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to embodiments. FIG. 1 shows a circuit form of a wire harness of an embodiment, and FIG. 2 shows a state of being assembled as a wire harness. In FIG. 1, 10A, 10B, 10C, 10D,
10E is a junction box, which is formed separately for each electrical component or each electrical system. Two
Reference numerals 0A, 20B, 20C, 20D and 20E are wire harness trunks (hereinafter abbreviated as trunks), which connect the junction boxes 10A, ..., 10E to each other. 30
30P are wire harness branch lines (hereinafter abbreviated as branch lines), and the junction box 10A, ... 1
0E and each electric component (not shown) are connected.

The junction box 10A, ... 1
0E, main lines 20A, ... 20E, branch lines 30A, ... 30P are separately formed in advance, and these are selected and used.
10E, the connector 40 attached to the trunk lines 20A, ... 20E and the connectors 50 attached to the branch lines 30A, ... 30P are fitted to the connector housing portions of the junction boxes 10A, ...
A, ... 30P are all junction boxes 10A, ...
The wire harness W / H consisting of one block having a required circuit is assembled by directly connecting to 10E.

Each of the junction boxes 10A, ...
As described above, the internal circuit of 10E is set so as to distribute all the power supplies and signals in units of electrical components or electrical systems, and branch lines 30A, ... 30P connected to the electrical components in the internal circuit. By connecting with a connector, it is possible to supply power and signals without providing branch lines on branch lines. Further, the internal circuit of each junction box is provided with a through circuit for connecting another junction box and the electrical component, as necessary, instead of directly distributing the power source and the signal to the electrical component.

Each junction box 10A, ... 10
The internal circuit of E may be formed by a bus bar, or as shown in FIG. 3, an electric wire 12 may be laid on the lower case 11 and a press contact terminal 13 may be pressed against the electric wire 12. Further, it may be an FPC or a PCB.

Lower case 11 of junction box
A large number of connector accommodating parts 15 are formed in the upper case 14 that fits with the inside of each of the connector accommodating parts 15 for external terminal connection provided on the pressure contact terminal 13 forming the internal circuit of the junction box. A tab 13a or a connector connecting portion in which relay terminals (not shown) connected to the tabs are arranged is provided. The same applies to the case where the bus bar forms the internal circuit, and the connector connecting portion is formed by the tab protruding from the bus bar or the relay terminal connected to the tab.

The junction box 10A, ... 1
The connector accommodating portion 15 formed in 0E includes a connector accommodating portion 15a for connecting to another junction box via the trunk lines 20A, ... 20E, and branch lines 30A ,.
Connector accommodating portion 15b for connecting to an electric wire product via
There are two types.

As shown in FIG. 4A, the trunk lines 20A, ... 20E are composed of a large number of electric wires 21 each of which is not spliced, and terminal fittings (not shown) are provided at both ends of each electric wire 21. , And these terminal fittings are housed in the connector housings 41 and 42 on both sides. That is, each of the main lines 20A, ..., 20E has a structure in which the connectors 40 are provided at both ends of a large number of electric wire groups made of a single wire, and is formed separately in advance. The main lines 20A, ..., 20E connect any of the junction boxes 10A, 10E to each other, and the respective connector 40 of the main line terminal is fitted into the connector accommodating portion 15a formed in these junction boxes. Of the internal circuits of the junction box formed separately, required circuits are connected to each other.

As shown in FIG. 4 (B), the branch lines 30A, ..., 30P have the same structure as the trunk lines 20A, ..., 20E, and are composed of at least one or more electric wires 31 which are all single wires that are not spliced. And each of these electric wires 31
Terminal fittings (not shown) are connected to both ends of the connector, and these terminal fittings are housed in the connector housings 51 and 52 on both sides. That is, each of the branch lines 30A, ..., 30P has a configuration in which connectors 50 and 60 are provided at both ends of a wire group consisting of a single wire.
It is formed separately in advance. The branch lines 30A, ..., 30P directly connect any of the junction boxes 10A, 10E to electrical equipment (not shown), and the connector housing portion 15b formed in the junction box.
While the connector 50 of one end of each branch line is fitted to the connector, the connector 60 of the other end is connected to an electrical component, and thus a desired circuit in the internal circuit of the junction box is directly connected to the electrical component. ing.

As described above, the junction boxes 10A, ... 10E, the trunk lines 20A, ... 20E, the branch lines 30A ,.
At the time of assembling H, the wire harness W / H as shown in FIG. 2 is assembled by selecting and using properly according to the type of electrical equipment mounted on the automobile and connecting the connectors.

For example, as shown in FIG. 5, branch lines 30A and 30 for connecting to electrical equipment arranged in close proximity in the vehicle.
B is wrapped with 70 tapes and tied together, and these branch lines 30A and 3
The 0B connector 50 is fitted into the connector housing portion 15b of the junction box 10A. Similarly, the branch lines connected to each of the junction boxes 10A, ..., 10E are bundled with a tape, or individually connected to the junction box by fitting a connector. After connecting the required branch lines to each junction box, the trunk line 2 is inserted into the connector housing portion 15a of the junction box 10A, ..., 10E.
The connectors 40 of 0A, ..., 20E are fitted and connected. At that time, the tape 80 is wound around the portion of the main line to be wired in the same direction. If necessary, cover with a corrugated tube. In this way, all are connected by connector fitting to complete the wire harness W / H shown in FIG.

The wire harness W / H shown in FIG. 2 has a large number of electrical components to be mounted on a vehicle, and the junction boxes 10A, ... 10E, main lines 20A, ...
E and branch lines 30A, ..., 30P are all connected. That is, it is a wire harness when all optional electrical components are mounted. On the other hand, FIG.
The wire harness W / H shown in (A) and (B) is the case where the electrical equipment to be mounted is thinner than the wire harness W / H in FIG. 2, and FIGS. 6 (A) and 6 (B) are the electrical equipment to be mounted. Different types of junction boxes, trunk lines and branch lines are different.

Thus, the junction box 10
A ... 10E, main line 20A, ... 20E, branch line 30A, ...
By forming 30P separately, the wire harness main line which is a combination of the junction box and the main line is different from the wire harness main line itself, and the wire harness main line is the same but the connected electrical components are different. Different types of wire harness can be assembled. That is, FIG.
The wire harness of the product number A shown in Fig. 6, the wire harness of the product number B shown in Fig. 6 (A), the wire harness of the product number C shown in Fig. 6 (C) It is possible to assemble different wire harnesses.

[0027]

As is apparent from the above description, the wire harness according to the present invention has the effects listed below. Designing a wiring harness so that a junction box, a wire harness main line and a branch line are formed separately for each electrical component and electrical system, and the junction box, wire harness main line and branch line are selected and used according to the required electrical components. Can easily respond to changes. That is, when the electric components to be mounted are different in the same vehicle type due to different destinations or different grades, it is only necessary to change the branch line connected to the junction box. If the vehicle type is different, it can be dealt with by changing the junction box to be used and the wire harness main line connecting these junction boxes.

In the internal circuit of the junction box,
A branch circuit is configured to distribute all power and signals for each electrical component or electrical system, and all branch lines that connect to electrical components are directly connected to the junction box. Eliminates the need for splicing and branching wires.
By eliminating the splicing of electric wires, which has been a difficult work in manufacturing, the splicing work process can be eliminated and the work efficiency is dramatically improved.

In the assembly of the wire harness, the wire harness main line, which is conventionally assembled as one block, is divided and formed separately, so that the length of the main line is shortened, and as a result, the formation of the wire harness main line is reduced. It can be done on the drawing board. Also, the connection between these preformed wire harness trunk lines and each junction box is 1
There is no need for a large space for assembling the wire harness because there is no need to perform on one assembly drawing board.

While a connector accommodating portion is provided in a preformed junction box, a connector that fits into the connector accommodating portion of the junction box is attached to the wire harness main line and branch line, so that all connections are fitted with a connector. The wiring harness can be assembled automatically. Further, the main line and branch line of the wire harness can be configured by a single line, and the manufacturing of the wire harness can be automated.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a wire harness according to an embodiment of the present invention.

FIG. 2 is a perspective view of the wire harness shown in FIG.

FIG. 3 is a schematic exploded perspective view of a junction box used in the wire harness of the present invention.

FIG. 4A is a perspective view of a wire harness trunk line used in the wire harness of the present invention, and FIG. 4B is a perspective view of a wire harness branch line.

FIG. 5 is a perspective view showing a state in which the branch lines of FIG. 4B are bound together.

6A and 6B are perspective views of a wire harness of an embodiment in which the wire harness of FIG. 2 is partially modified.

FIG. 7 is a perspective view of a conventional wire harness.

FIG. 8 is a perspective view of another conventional wire harness.

FIG. 9 is a wiring diagram of the wire harness of FIG.

[Explanation of symbols]

 10A to 10E Junction box 15 (15a, 15b) Connector accommodating portion 20A to 20E Wire harness main line 30A to 30P Wire harness branch line 40, 50, 60 Connector 21, 31 Wire W / H wire harness

Claims (2)

[Claims] 1. A plurality of junction boxes each having an internal circuit for each electrical component or each electrical component system, a wire harness trunk line wired between these junction boxes, and a wire harness branch line wired between the junction box and electrical components, respectively. Separately provided, the internal circuit of the junction box is a branch circuit that distributes all the power / signals in units of electrical equipment or electrical systems, internal circuits of other junction boxes, and internal circuits of other junction boxes. And a through circuit for connecting electrical components to each other, the junction box is provided with a connector accommodating section for connecting the internal circuit to the wire harness trunk line and the wire harness branch line, and of the wire group forming the trunk line and the branch line. All wires without branching A single wire is used, and these wire harness trunk lines and wire harness branch lines are equipped with connectors at the ends of the wire groups, respectively, and the junction box, wire harness trunk line, A wire harness for a vehicle, in which a wire harness branch line is selected and the connectors of the selected wire harness trunk line and wire harness branch line are fitted and assembled in a connector housing portion of a selected junction box. 2. The junction box includes a connector accommodating portion for connecting to another junction box via a wire harness main line, and a connector accommodating portion for connecting to an electrical component via a wire harness branch line. The vehicle wire harness according to claim 1.