JP3545510B2 - Automotive wire harness - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a wiring harness for an automobile, and more particularly, to a general-purpose wiring harness for many models.
[0002]
[Prior art]
Conventionally, a wire harness routed in an automobile, i.e., instrument panel harness, engine room harness, cowl harness or the like, as shown in FIG. 7, both ends or one end of the main line 1 of the wire harness W / H There are junction boxes 2 and 3 which distribute power and branch / connect circuits mainly for each electrical component. The wires of the trunk line 1 connected to the junction boxes 2 and 3 via connectors are divided for each electrical component, and further, the branch wires 4 are spliced to the wires of the trunk line 1 and connected to the respective electrical components.
[0003]
[Problems to be solved by the invention]
As described above, the circuit of the conventional wire harness is systematized for each electrical component mounted on the vehicle. In other words, since only a predetermined circuit for connecting to the mounted electrical component is provided, the electrical component mounted is If they differ due to differences in options or destinations, they need to be manufactured separately even if there is only a slight difference in circuit. As a result, dozens of types of wire harnesses are manufactured and used for the same vehicle type.
[0004]
However, the wire harness Ri Contact becomes junction box, connectors, wires, a complex structure that is composed of a number of components such as the splice member, therefore, troublesome to assemble the wire harness to form one wire harness with such The costs for this are also high.
[0005]
Therefore, there is a demand for a wire harness that can be used universally even if the mounted electrical components are slightly different, but as described above, a circuit is formed from a large number of components such as a junction box, a connector, an electric wire, and a splice member, and Because of the complicated configuration, it is very difficult to change the circuit of the wire harness and generalize it for models of different electrical components mounted even in the same vehicle type.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has as its object to provide a general-purpose wire harness in the same vehicle model, even if electrical components are slightly different due to differences in options or destinations.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, the present invention includes a pair of main junction boxes arranged at least on both sides, and a harness wired in parallel between the main junction boxes according to claim 1,
The harness while having a minimal shared circuit required in the same model as the parallel circuit, and minimal common circuitry required within the circuit also same model of the main junction boxes, option in the same vehicle type and A power supply circuit and a signal circuit for connecting to the specification difference circuit are provided,
When mounting the electrical component other than shared circuit in the same vehicle type, provided with a sub-junction box, an internal circuit of the sub-junction box, required for the selected from among the harness circuits Contact and main junction box An automobile wire harness having a configuration for electrically connecting a power supply circuit and a signal circuit is provided.
[0008]
In the wire harness having the above configuration, when there is an electrical component other than the minimum necessary electrical component, that is, an optional electrical component or an electrical component to be mounted at a difference in destination, a sub-connector connected to the electrical component is provided. Select the required wires from the harnesses wired between the main junction box and connect the junction box, and if there is no circuit wire to be connected to the wires in the harness, A required circuit can be formed by connecting to a power supply circuit and a signal circuit provided in the junction box via electric wires. In this way, it can be applied to all wire harnesses of the same model, and if the electrical equipment differs depending on options and destinations, it is only necessary to attach a sub-junction box and, if necessary, connect the sub-junction box and the main junction box it is.
[0009]
The connection between the internal circuit of the sub-junction box and the wires wired in parallel can be made by pressing the insulation displacement terminal connected to the internal circuit of the sub-junction box to the wire selected from the wires wired in parallel. preferable. (Claim 2) It is preferable that after the press contact terminals are connected, they are rounded into a cylindrical shape in a parallel wiring manner so that a required space can be reduced.
[0010]
As described above, the harness to be routed between the main junction box is a parallel-wired electric wire, so that the crimp terminal attached to the sub-junction box is crimp-connected to the required electric wire at any position. Can be and are not subject to space restrictions. Further, since the press-connecting terminal attached to the sub-junction box is directly connected to the electric wire, there is no need to perform splice connection or the like to increase the number of circuits in response to the increase in electrical components.
[0011]
The connection by the insulation displacement terminal is performed by placing the upper case and the lower case of the sub-junction box with the harness where the parallel wiring is interposed, and pressing the insulation displacement terminal attached inside the case to the required electric wire of the parallel wiring harness. It is preferable to connect them.
[0012]
With the above-described configuration, a required circuit can be easily formed simply by attaching the upper case and the lower case of the sub-junction box at an arbitrary position with a wire group in which the upper case and the lower case are wired in parallel.
[0013]
The connection between the internal circuit of the sub-junction box and the power supply circuit and signal circuit of the main junction box is performed by arranging the wires connected to the internal circuit to the main junction box, and connecting the power supply circuit and the signal circuit with a connector. Is connected to (Claim 3)
[0014]
In other words, the harness routed between the main junction boxes is provided with only the wires that make up the circuit necessary for the shared circuit, and is connected to the sub junction box for the electrical component circuit other than the shared electrical component. it may have circuit is wiring that need. In that case, a harness connected to the internal circuit of the sub-junction box provided with a connector connecting the harness to the main junction box, connected to the power supply circuits Contact and signal circuits provided in the main junction box I have. With this configuration, the harness to be routed between the main junction box is only a group of wires constituting the minimum necessary shared circuit, the amount of wires is reduced, and the basic form of the wire harness can be easily configured.
[0015]
Each parallel-wired electric wire of the harness connecting both ends to the main junction box is directly connected to the internal circuit of the main junction box without using a connector. (Claim 4)
[0016]
When the electric wires to be wired in parallel as described above are directly connected to the internal circuit of the main junction box by welding or the like, there is no need to provide a connector connection portion in the main junction box, and the size of the main junction box can be reduced.
[0017]
The wire harness having the configuration of the present invention can be suitably applied to a harness having a large number of circuits, such as an instrument panel harness, a cowl harness, a floor harness, a roof harness, and a language room harness. (Claim 5)
[0018]
Embodiment
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an overall schematic diagram of a cowl harness according to an embodiment of the present invention. 10, 11, and 12 are a pair of main junction boxes arranged on both sides and a central portion, 13, 14, and 15 are harnesses that are wired in parallel, 13 is between the main junction boxes 10 and 12, and 14 is the main junction box. The wiring 15 is connected between the junction boxes 12 and 11, and the wiring 15 is connected between the main junction boxes 10 and 11.
[0019]
Each of the three main junction boxes 10 to 12 has an internal circuit formed by a bus bar. The internal circuit has a minimum common circuit required for the same vehicle type and an option and destination difference circuit for the same vehicle type. A power supply circuit and a signal circuit for all circuits that can handle all of them are provided.
[0020]
The main junction boxes 10 and 11 on the left and right sides are arranged on the left and right sides of an instrument panel (not shown), and connectors 10a and 11a for connection to engine room harnesses 16A and 16B and floor harness 17A, respectively. Connectors 10b and 11b for connection to the engine room harness and floor harness are provided. Further, the main junction boxes 10 to 12 are connected to a shared circuit of an internal circuit and a shared electrical component to which a common signal and a power supply circuit are connected, for example, a shared electrical component circuit 19 to connect an ignition switch 18 and the like. Connectors 10c, 11c, and 12c are provided. Furthermore, connection terminals are provided for power supply circuits and signal circuits that need to be connected to optional components other than shared electrical components and electrical components to be mounted depending on the destination, and connectors 10d, 11d, and 12d in which these connection terminals are arranged are provided. Provided.
[0021]
The harnesses 13 to 15 routed between the main junction boxes 10 to 12 are provided with a minimum necessary shared circuit of the same vehicle type as a parallel circuit, and are configured by wiring a plurality of electric wires in parallel. Both ends of these parallel wires are connected to the shared circuits of the main junction boxes 10 to 12 .
[0022]
As shown in FIG. 2, the connection between the large number of electric wires 20 constituting the harnesses 13 to 15 and the bus bar 21 of the internal circuit of the main junction boxes 10 to 12 exposes the core wires 20 a at the ends of the electric wires 20. The core wire 20a is inserted into the comb-shaped electric wire insertion portion 22 formed on the side wall of the main junction box 10 to 12, and is collectively superimposed with the comb-shaped terminals 21a of the bus bar 21 installed correspondingly. It is permanently connected by welding with sonic welding.
[0023]
The connection between the electric wires 20 of the harnesses 13 to 15 and the internal circuits of the main junction boxes 10 to 12 is not limited to the above embodiment. For example, the internal circuit of the main junction box is formed by electric wires and pressure contact terminals. In this case, the electric wires 20 of the harnesses 13 to 15 may be inserted into the main junction boxes 10 to 12 to connect the electric wires 20 to the electric wires of the internal circuit via the press contact terminals having a pair of press contact blades. Good. Further, while connectors may be connected to both ends of the electric wire 20, the connector fitting portion may be provided in the main junction box to connect the connectors. However, in view of downsizing of the main junction box and reduction in the number of parts. Therefore, it is preferable that the connection is made directly without using a connector.
[0024]
When the electrical component 30 is mounted in accordance with options other than the common electrical component and the destination, as shown in FIG. 1, a small sub-junction box 31 is connected to an arbitrary portion of the harnesses 13 to 15. ing.
[0025]
As shown in FIGS. 3A and 3B, the sub-junction box 31 is provided with an upper case 33 and a lower case 34 sandwiched between the harnesses 13 to 15 in which the parallel wiring is carried out. The terminal is pressed into contact with a required electric wire 20 of the harnesses 13 to 15 so as to be electrically connected.
[0026]
More specifically, as shown in FIG. 3 (B), a press contact terminal 35 provided with press contact blades 35a and 35b on both upper and lower sides is used, and a press contact blade 35b at the lower end is connected to an electric wire 36 wired inside the lower case 34. When the lower case 34 is attached to the electric wire 20 of the harness, the electric wire 20 is pressed and connected by the upper electric contact blade 35a. A press contact terminal 37 provided with an external output terminal 37a is further pressed against the electric wire 36 of the lower case 34, and the external output terminal 37a is connected to the electric wire of the electrical component circuit 38 via the connector 41.
[0027]
Further, as shown in FIG. 3 (C), but connected by pressure contact terminal 35 of the internal wiring 36 and the harness wires 20 are the same, not the terminal (shown that crimping or pressure to one or both ends of the internal wiring 36 ) May be housed in a connector housing and this connector may be connected to the main junction box. In this case, a connector connected to the sub - junction box becomes unnecessary.
[0028]
If the electric wire of the circuit to be connected to the circuit of the sub-junction box 31 is not present in the electric wire 20 constituting the harnesses 13 to 15, the harness 39 connected to the circuit is connected, and the other harness 39 is connected. The connectors connected to the ends are fitted and connected to the connectors 10d to 12d of the main junction boxes 10 to 12, respectively.
[0029]
The connection between the sub-junction box 31 and the electric wires 20 of the harnesses 13 to 15 may be configured as shown in FIG. 4 according to the electric component circuit 38 to be added. That is, a circuit is not provided inside the sub-junction box 31, and a pressure contact terminal 35 'having a pressure contact blade 35'b at the lower end and an external output terminal 35'c at the upper end is mounted inside the upper case 33'. and advance, 'while the electric wire 20 and the pressure contact b harness 13-15, the external output terminal 35' press-connecting blade 35 wires projecting from the connector part provided with the c on the upper casing 33 'electrical component circuit 38 Is connected to the connector.
[0030]
As shown in FIG. 5, a press contact terminal 35 "provided with a long press contact blade 35" a at the upper end is attached to the lower case, and the electric wire 36 wired to the lower case 34 and the electric wire 20 of the harnesses 13 to 15 are connected to the press contact blade 3 ". Pressing may be performed at 5 a ″.
[0031]
In the wire harness having the above configuration, since the electric wires 20 of the harnesses 13 to 15 are wired in parallel, the sub-junction box 31 can be connected to the electric wire 20 at an arbitrary position. Therefore, the sub-junction box 31 can be mounted at the position closest to the electrical component 30 to be connected, and can also be mounted at a place where space is available.
[0032]
As the optional electric component 30 connected using the sub-junction box 31, there is an ABS device (anti-lock brake device) 50 and the like as shown in FIG. When these ABS devices 50 are mounted, wires of a required circuit among the wires 20 constituting the harnesses 13 to 15 are connected to the internal circuit of the ABS sub-junction box 31-1 via the press-connecting terminals. . Circuits not included in the wires 20 constituting the harnesses 13 to 15 are connected to power supply circuits and signal circuits of the main junction boxes 10 to 12 via a harness 39 and a connector.
[0033]
Specifically, the electric wires 20 of the harnesses 13 to 15 connected to the internal circuit of the ABS sub-junction box 31-1 via the press contact terminals are connected to the electric wire 20w-1 for the power supply circuit and the main switch to the stop switch 53. It is the electric wire 20w-2 connected via the internal circuit of the junction box 11. Further, the internal circuit of the ABS sub-junction box 31-1 is connected to the connector 10d of the main junction box 10 via the harness 39 and the connector. A circuit C1 connected to the left front wheel speed sensor and a circuit C2 connected to the left rear wheel speed sensor are connected to the connector 10d. Further, the internal circuit of the sub junction box 31-1 is connected to the connector 11d of the main junction box 11. A circuit C3 connected to the right front wheel speed sensor and a circuit C4 connected to the right rear wheel speed sensor are connected to the connector 11d. Further, the internal circuit of the sub junction box 31-1 is also connected to the connector 12d of the main junction box 12. The connector 12d is connected to a circuit C5 connected to a traction control device 51, which is a common electrical component. As described above, the ABS sub-junction box 31-1 is connected to the harness electric wire 20 and the internal circuits of the main junction boxes 10 to 12.
[0034]
As described above, in the wire harness of the present invention, the circuit corresponding to the minimum necessary common electrical component is formed in advance in the internal circuit of the main junction box, and the connector may be connected to the common electrical component. Has become. On the other hand, a circuit corresponding to electrical components mounted in other optional specifications or destination specifications can be configured simply by connecting the sub-junction box to the harness and, if necessary, to the main junction box. Therefore, it can be widely used for all the same vehicle types.
[0035]
Although the above embodiment is applied to the cowl harness, the invention is also applied to a harness including a large number of circuits, for example, an instrument panel harness (instrument harness), a floor harness, a roof harness, a language room harness, and the like. It goes without saying that you can do it.
[0036]
【The invention's effect】
As apparent from the above description, according to the wire harness of claim 1 of the present invention, the sub-junction box is connected to the harness, Since it can be handled simply by connecting to the main junction box as needed, it can be applied to all wire harnesses of the same model. Therefore, mass production becomes possible and cost can be reduced. In addition, the wiring harness used when mounting electrical components other than the common electrical components is provided with a sub-junction box attached to the wire harness of the basic form provided in advance, and connection with the main junction box is performed as necessary. Therefore, it is possible to manufacture quickly and easily, and it is possible to shorten the manufacturing time.
[0037]
In addition, since the harnesses routed between the main junction boxes are wired in parallel, the sub junction box can be connected at any point, and there is no restriction due to space, and the freedom of design is increased. Increase. In addition, it is possible to connect to the electrical component to be connected at the shortest position, and it is possible to reduce the number of wires.
[0038]
Further, when the press contact terminal connected to the internal circuit of the sub-junction box is press-contacted to the electric wire of the harness as described in claim 2, the connection can be made extremely easily at an arbitrary position. In addition, when the insulation displacement connection using the insulation displacement terminal is used, the connection can be made collectively on the assembly drawing board of the wire harness, so that the number of operations can be simplified and the cost can be reduced.
[0039]
Further, since the harness to be routed between the main junction boxes is used only for the minimum necessary shared circuit, it is possible to reduce the number of lines. In addition, when there is a circuit that needs to be connected other than the shared circuit harness, it is only necessary to connect the connector to the main junction box, so that a required option or a circuit for a destination can be easily formed.
[0040]
Furthermore, when the electric wire of the harness connecting both ends to the main junction box is directly connected to the internal circuit of the main junction box without using a connector as described in claim 4, the main junction box Can be simplified and the size can be reduced.
[Brief description of the drawings]
FIG. 1 is an overall view showing a circuit configuration of a wire harness of the present invention.
FIGS. 2A and 2B are perspective views showing a connection between a main junction box of FIG. 1 and a wire of a harness.
3A is an exploded perspective view showing the connection between the sub-junction box of FIG. 1 and an electric wire of a harness, FIG. 3B is an enlarged perspective view of a main part, and FIG. 3C is an enlarged main part showing another example. It is a perspective view.
FIG. 4 is a perspective view showing another connection form between the sub-junction box and the electric wire of the harness.
FIG. 5 is a front view showing still another connection form between a press contact terminal and an electric wire.
FIG. 6 is an explanatory diagram showing a connection configuration between a sub junction box, a harness, and a main junction box.
FIG. 7 is a perspective view of a conventional example.
[Explanation of symbols]
10, 11, 12 Main junction box 13, 14, 15 Harness 30 Electrical equipment 31 Sub junction box 35 Press-contact blade

Claims (5)

At least a pair of main junction boxes arranged on both sides and a harness wired in parallel between these main junction boxes,
The harness while having a minimal shared circuit required in the same model as the parallel circuit, and minimal common circuitry required within the circuit also same model of the main junction boxes, option in the same vehicle type and A power supply circuit and a signal circuit for connecting to the specification difference circuit are provided,
When mounting the electrical component other than shared electrical equipment to the same vehicle type, provided with a sub-junction box, an internal circuit of the sub-junction box, electric selected circuitry Contact and main junction box from among the harness An automotive wire harness having a configuration for electrically connecting a source circuit and a signal circuit. 2. The automobile wire harness according to claim 1, wherein the press-connecting terminal connected to the internal circuit of the sub-junction box is press-contacted to a wire selected from parallel wires of the harness to be electrically connected. To connect the internal circuit of the sub-junction box to the power circuit and signal circuit of the main junction box, route the wires connected to the internal circuit of the sub-junction box to the main junction box and connect them with connectors. The automobile wire harness according to claim 1, wherein The main junction electric wire each parallel wiring of the internal circuit and the harness boxes, automotive wiring harness according to any one of claims 1 to 3 are directly connected without using a connector. The vehicle wiring harness according to any one of claims 1 to 4, wherein the wiring harness comprises an instrument panel harness, a cowl harness, a floor harness, a roof harness, or a language room harness.

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