JPS63227441A - Wiring system for automobile - Google Patents

Abstract

PURPOSE:To aim at the promotion of simplification and lightweightiness for wire harness, by constituting a main line of the wire harness with flat harness, and connecting a junction block housing control parts dispersedly set up in proper spots with the flat harness. CONSTITUTION:Flat harness A constituting a main line of wire harness is made up of setting up plural pieces of parallel conductors 2 on an insulating substrate 1, and covering the top of these conductors with another insulating substrate 1'. Likewise, flat harness B (B1 and B2) constituting a branch part is made up of setting each conductor 4 in plural pieces of parallel grooves 3a installed in an insulating substrate 3. Both harness parts A and B are permanently connected after superposing the conductor 4 on the conductor 2 via an insulating sheet 8 and welding both conductors 2 and 4 through plural holes 3a and 8a. And, junction blocks C1 and C2 where control parts such as a fuse and a relay or the like are connected to connections D1 and D2 of the harness A via connector parts 71 and 72.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is directed to an automobile that can simplify wiring harnesses and easily automate wiring and manufacturing in a limited space inside a car. regarding the wiring system.

[Conventional technology]

As shown in Fig. 8, a conventional wire harness has a structure in which a plurality of branch wire parts are led out from a main wire part (a) in which a large number of electric wires are bundled by tape winding, and junctions are distributed at appropriate locations on the vehicle. It is connected to block d and various electrical components via connector C.

There are three methods for leading out the branch line parts: simply bending the electric wire of the main line part a, connecting it to the middle part of the electric wire using a joint terminal, and using the above-mentioned junction block.

Among these methods, the method using a joint terminal requires a number of steps such as stripping the middle part of the wire, crimping the terminal, and wrapping the crimped part with tape, so it is difficult to automate and inevitably increases the size of the wire harness.

On the other hand, a junction block generally includes a plurality of fuses, relays, etc., as well as a branch circuit using a bus bar. Therefore, for example,
As disclosed in Publication No. 32, junction blocks are distributed at appropriate locations such as in the engine compartment of a car or near the instrument panel, and these blocks are connected to each other at the main line to connect various electrical components. By wiring through each block, the number of branch lines led out from the main line can be greatly reduced and the wiring form can be simplified.

However, when the joint is absorbed into the junction block, the number of wires that make U-turns to the main line increases as the number of terminals and circuits within the block increases, so there is little effect in suppressing enlargement of the main line.

[Problem that the invention seeks to solve]

The number of on-vehicle electrical components has been increasing in recent years, so as long as the basic form of the wire harness is a structure in which a large number of electric wires are bundled together by wrapping tape, etc., it is inevitable that the wire harness will become bulky and require a considerably large installation space. I need. Furthermore, it is difficult to automate the manufacturing of wire harnesses because it is not possible to absorb all the branch wires for the main wire into the junction block.

An object of the present invention is to solve the above problems and provide a wiring system that is optimal for preventing enlargement and has a structure that allows for easy installation in a narrow space and mass production through automation.

[Means for solving the problem (first invention)] In order to achieve the above-mentioned object, the automotive wiring system of the present invention uses a plurality of parallel conductors as the main line of the wire harness. It is composed of a flat harness that is insulated and fixed in a flat shape, and connects junction blocks that are distributed at appropriate locations in the automobile and that house a plurality of fuses, necessary relays, and other control parts. It is characterized by

The above configuration will be explained with reference to the drawings. In Fig. 1, A is a flat harness that constitutes the main part of the wire harness, B+ and Bz are flat harnesses that also constitute branch parts, and C, , C, are junction blocks. are shown, and two blocks CI and C2 are connected to a flat harness A.

The flat harness A that constitutes the trunk section has a structure in which a plurality of parallel conductors 2 are arranged on an insulating substrate 1 made of synthetic resin, and the top is covered with another insulating substrate (or insulating sheet) 1'. . This flat harness A can be formed freely according to the installation route inside the vehicle, such as by providing a right-angled bend A0 as shown in the figure or by bending it in an oblique direction.

The conductor 2 does not necessarily have to be of the same standard capacity; for example, it is possible to use a combination of conductors of various standards, such as a power line connected to the in-vehicle power source (battery or alternator) to supply electricity to a load, or a signal line for operating a relay. Can be placed. Further, the conductor 2 is connected to the junction block Ct
, Cz, and those not connected but connected to other junction blocks (not shown).

The flat harnesses Bl and B2 constituting the branch line portion are
As shown in Figures a and b, the conductor 4 is formed by disposing a plurality of parallel grooves 3a in an insulating substrate 3. Each of the flat harnesses B+ and Bz has a connector portion 7 composed of a round bottle terminal 5 as a terminal portion connected to one end of the conductor 4 and a connector housing 6 integrally formed with the insulating substrate 3. The connector housing 6 is assembled by integrally forming a wall member 6b having a support groove 6a for the pin terminal 5 at the end of the insulating substrate 3, and fitting and fixing the frame member 6C to the wall member 6b.

The connection between flat harness A and flat harness B (B2) is performed as follows. As shown in Figure 1,
The conductor 4 is overlapped with the conductor 2 with an insulating sheet 8 in between. The insulating sheet 8 and the insulating substrate 3 include
A plurality of holes 3a and 3b necessary for connection are provided respectively, and the flat harness A is connected through these holes 3b and 8a.
,B.

The conductors 2 and 4 are permanently connected using known means such as spot welding and soldering.

In the same manner as the flat harness B1 (B2), the flat harness A has connection parts, D, to the junction blocks CI, Cz. Each connection part has a connector part L+7□ for input/output, and corresponding connector parts (not shown) of junction blocks C+ and Cz.
It is mated and connected.

There are no particular restrictions on the type of junction block CI+02 used here, including conventional fuse blocks, relay blocks, combinations of both, and various control units as necessary, such as a key removal prevention alarm unit, a wiper block, etc. A control unit, power window control, etc. can be used alone or in combination with the fuse block, etc.

[For production]

In the wiring system of the present invention, two junction blocks C, .
The main line connected to the C2 motor is composed of a flat harness A.

Since this flat harness A has a thin flat plate shape, it can be easily installed in a narrow space such as the back of a car's instrument panel, and it can be placed almost anywhere along the inside floor of the car. Does not take up space.

In addition, the flat harness A has a simple structure in which multiple conductors 2 are arranged in parallel on an insulating substrate 1, and branch wires (
Since the flat harness BI, B2) can be derived and each branch line part is unitized, automation of the manufacturing as a whole can be easily achieved.

Furthermore, since it is easy to make a branch connection to the flat harness A that is the main line, that is, to lead out a branch line, the following effects occur.

Figures 3a and 3b compare circuits based on the present invention and a conventional wiring system, respectively.

In Fig. 3, which shows a conventional example, part Indicates a situation that should be avoided. As a result, the number of circuits and connection terminals in the junction block increases, and the number of electric wires in the trunk section a increases. The electric wires f, , f, indicated by thick lines clearly represent this state.

According to the present invention, as is clear from FIG. 3a, there is no need to intensively provide branch busbars in the junction block C+ (or cg), and the joint is connected to the flat harnesses A and Bl (B,) as described above. This is done by connecting with. Similarly, joints unrelated to electronic components included in the junction block, such as fuse g and relay h, can also be absorbed by flat harnesses A and B outside the block.

As a result, the number of main wires (conductors) in flat harness A, which is the main wire, is reduced, eliminating the need for long-distance routing like wires f1 and f2 shown in thick lines, and making it possible to connect various electrical components over the shortest distance. , which helps reduce the weight of the wire harness itself. Furthermore, since the junction block has almost no branch bus bars, the number of rotations and the number of terminals are greatly reduced, and the internal structure is simplified and the block is made lighter and smaller. The thick line conductors 2° and 4° in FIG. 3 correspond to the electric wires f, f2, respectively.

〔Example〕

Figures 4a and 4b show another embodiment of the present invention, in which two junction blocks c,',c,' are integrally formed and connected to a flat harness A.

That is, a plurality of busbar-shaped conductors 4' are connected to the conductor 2 of the flat harness A via an insulating sheet 8, and a group of these conductors 4' is connected to the junction block CI'.
(C2') is configured as an internal circuit or a part thereof. A group of male tab terminals 5' connected to one end of the conductor 4' is positioned in a connector housing 9 of an insulating substrate 3', so that electronic components such as a relay h and a fuse g can be directly connected. Of course, it is also possible to connect to electrical equipment via a connector.

Note that the insulating substrate 1.3', the insulating sheet 8, etc. are the conductor 2,
It is molded together with 4'.

In this way, by configuring the main line part with the flat harness A and interposing the branching conductor 4', it becomes possible to integrate it with the junction block.

FIGS. 5a and 5b and FIG. 6 show other methods of connecting flat harnesses constituting a main line section and a branch line section, respectively.

In Figure 5 a and b, flat harness (main section) A
The conductor 2' is formed into a narrow band shape by punching a thin sheet metal, and a pressure contact terminal 10 having a slot 10a is connected upright from the side edge of the conductor 2'. Note that the pressure contact terminal 10 may be formed as a separate member and permanently connected to the conductor 2' by means such as spot welding.

In this case, if the insulating sheet 8 is provided with a long hole 8b through which the pressure contact terminal 10 passes, the conductor 4 on the flant harness B side can be press-fitted into the slot 10a and easily jointed.

FIG. 6 shows that the insulating substrate 1 supporting the conductor 2 on the side of the flat harness A is provided with a plurality of grooves 1a for arranging the four bodies and the six 1b for connection, while the conductor 4' on the side of the flat harness B
Form it into a narrow strip shape and attach it to the conductor 4' in the same way as above)
An example in which a press-contact terminal IO having a pressure contact terminal 10a is provided is shown.

In this case, the perforated insulating sheet 8 can be omitted, and one end of the conductor 4' can be used as it is as the male tab terminal 5'.

[Means for Solving the Problems (Second Invention)] Another invention for achieving the above-mentioned object is to install a junction block containing a plurality of fuses, relays, and other control parts at appropriate locations in an automobile. These junction blocks are connected to each other by a main line section including a power line connected to the on-vehicle power source and a signal line connected to the relay. A wiring system for an automobile in which electrical components placed in various parts of the automobile are energized by branch line parts led out from the middle, and the main line part and the branch line parts led out from the middle are each connected to a plurality of parallel conductors. It is characterized by being composed of a flat harness formed by insulating and fixing it in a flat shape.

In the first invention shown in FIGS. 1 to 6, two junction blocks CI+02 or C
I'IC! ' are each independently connected to the flat harness A.

On the other hand, in the second invention, one wire harness is completed by mutually connecting two junction blocks with a flat harness serving as a main line, or by sequentially repeating this process.

To explain the configuration of the second invention based on the drawings, in FIG.
A connector housing 12 is provided integrally with the insulating substrate 1.degree. 1' to form a connector section 13 for connecting the trunk section, and is constructed as a unit having a predetermined length.

E and F respectively indicate an electronic port 11 unit and a fuse block as a junction block. In this case, the conductor 2 that constitutes the flat harness A' consists of a power line connected to the on-vehicle power supply and a signal line connected to the electronic circuit unit F, and these lines are used as a common circuit for each junction block. be done. Note that the branch line portion B is the same as described above, and a description thereof will be omitted.

[For production]

According to the second aspect of the invention, since the main part of the flant harness can be made into a unit, the length and bending direction of the entire wire harness can be freely changed by combining them. Furthermore, various types of junction blocks can be interconnected directly or via a flat harness without using any conventional wire harnesses.

As explained above, according to the present invention, the following effects can be obtained.

(1) The number of conventional members for converging and fixing electric wires, such as vinyl tape and clamps, is reduced, and the insulating substrate can also be formed into a thin sheet shape, resulting in a lighter overall wire harness.

(2) Since the conventional joints between wires can be replaced by connecting the main wire and branch wires, the number of man-hours required to process the wires is reduced.

(3) Since the joint caused by the bus bar in the junction block can be handled in the same way as in (2), the number of terminals and circuits in the block can be reduced, making it easier to reduce weight and size.

(4) Connection between the trunk line and the branch line can be made at any position depending on the shortest distance to the electrical equipment or the wiring location, which facilitates circuit design.

(5) Since the trunk line section or the branch line section and the junction block can be integrated, the number of man-hours required for assembling the conventional wire harness can be reduced, and the interior space of the vehicle can be made more spacious. Further, since the circuit conductors in the junction block and the conductors in the main line section and the branch line section can be formed continuously without cutting each other, electrical reliability is improved.

(6) Both the main line part and the branch line part constituting the wire harness have a flat and simple structure, making it easy to automate production and avoid increasing the diameter due to the conventional wire convergence shape.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing an embodiment of the first invention. Figures 2 a and b are an exploded perspective view (al) and an assembled perspective view (bl) showing the same branch line parts as enlarged. Figures 3 a and b are wiring diagrams of the first invention and the conventional wiring system. Figures 4a and 4b are a schematic perspective view (a) and a cutaway perspective view ('b) of essential parts showing another embodiment of the first invention. Figures 5a and 6 are FIG. 7 is an explanatory diagram showing another embodiment of the method of connecting the main line part and the branch line part, respectively. FIG. 7 is an overview perspective view showing an embodiment of the second invention. FIG. 8 is an explanatory diagram of a conventional example. Yes. A, A'...Flat harness (as main part),
B, B,, B,... Flat harness (as a branch line part), C,, C2, C,', C2'... Junction block, D+, Dz... Connection part, E... Electronic Circuit unit, F...fuse block, 1゜1', 3
... Insulating substrate, 2.2', 4.4'... Conductor, 5.
5'...terminal section,? ,L,? □・・・Connector part,
8... Insulating sheet, 13... Connector section for connecting main line section.

Claims (2)

[Claims] (1) The main wire harness consists of a flat harness made by insulating and fixing multiple parallel conductors in a flat shape, and is distributed at appropriate locations in the vehicle and is equipped with multiple fuses, necessary relays, etc. A wiring system for an automobile, characterized in that a junction block housing control parts is connected by the flat harness. (2) Junction blocks housing multiple fuses, relays, and other control parts are distributed and arranged at appropriate locations in the vehicle, and these junction blocks are connected to the power line connected to the on-vehicle power source and the relay. Wiring for an automobile is connected by a main line section including a signal line connected to the main line, and is connected to the junction block or is connected to the branch line section led out from the middle of the main line section to energize electrical components arranged in various parts of the automobile. 1. A wiring system for an automobile, characterized in that the system is constituted by a flat harness formed by insulating and fixing the main line part and branch line parts led out from the middle thereof in a flat shape with a plurality of parallel conductors.