JPH0494011A - Flat wire harness - Google Patents

Abstract

PURPOSE:To provide a flat wire harness of multilayered structure capable of carrying out interlayer contact easily as well as high density wiring of wires by preparing a constitution where repeating circuit boards are arranged in at leat two lines on one insulation sheet and then wiring is carried out. CONSTITUTION:On a wiring base 20 a plurality of repeating circuit board groups 2A, 2A', 2A,... and 2B, 2B', 2B,... are aranged in two lines A and B. Between the lines A and B a bending back marging (d) is left at a proper space and the repeating circuit plates 2A and 2B, 2A' and 2B',... are alternately arranged respectively to prevent overrapping caused by the bending back from generating. With this arrangement, such a wire harness is obtained as having a high wiring density of wires and a multilayered structure capable of carrying out interlayer contact easily.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a flat wire harness used for electrical wiring of a vehicle.

[Conventional technology]

Current wire harnesses have a configuration in which multiple branch wires are provided in a branched manner to a main wire section in which a large number of electric wires are bundled together by wrapping tape, etc., and the shape is complex, making it difficult to automate manufacturing. Due to the increase in the number of in-vehicle electrical components, they have become bulky and bulky, and it takes a great deal of labor and time to assemble them into the vehicle, which is one of the factors that hinders improvements in automobile productivity.

Therefore, the applicant has developed a wire harness as shown in Figures 4 to 6 in order to make it thinner and lighter, to facilitate automation of manufacturing, and to facilitate assembly into vehicles, in place of the conventional wire harness type. proposed a flat wire harness (Japanese Patent Application No. 2-115827).

In these figures, 1 indicates a long rigid insulating board, on which a plurality of relay circuit boards 2.2', 2 are placed at predetermined intervals.
"..." is fixed in the - column.

The relay circuit board is formed by press-fitting and fixing junction bars 4 into a plurality of slits 3a arranged in parallel on a circuit board 3, as represented by the reference numeral 2 in FIG. The junction bar 4 has a tab 4a serving as a connector terminal at one or both ends, and a pressure contact terminal portion 4b having a slot 4C protrudes from one longitudinal edge.

5 and 5' indicate connectors attached to the tab 4a;
It is constructed by inserting a female relay terminal 6 into a terminal accommodating chamber 5b within a housing 5a. In the figure, 5c and 3d indicate locking means for connecting the connector 5 and the circuit board 3, and 50' and 30' indicate insertion means.

Electrical connections between each relay circuit board are made as follows.

After one end of the covered electric wire 7 is pressed into pressure contact with the insulation displacement terminal section indicated by the reference numeral 4b+ of the relay circuit board 2' using the automatic wiring machine 10 having a known structure, the cable is routed toward the adjacent circuit board 2''. The cable is press-fitted into the press-contact terminal part 4b there, and the cable is cut at this point, or the cable is routed toward the adjacent relay circuit board 2'' without cutting.

Thereafter, by repeating this wiring sequentially, the connector 5 is brought into pressure contact with the junction bar of the desired relay circuit board.
．． A circuit electrically connected to (tab 4a of) 5' is formed.

Reference numeral 8 denotes an adhesive protective sheet, which is placed over the insulating plate 1 and each relay circuit board 2, 2', . . . using a heating roller 11.
The wired covered wires 7 are fixed and protected, and a protective cover 9 is attached if necessary.

[Problem to be solved by the invention]

In the flat wire harness with the structure shown in Fig. 4, there is only space for wiring the electric wires 7 on the relay circuit boards 2, 2', etc. on one harness. If the number of locations (displacement terminal section 4b) increases, the slot 4C will be blocked due to wires overlapping each other or wires passing over the pressure terminal section, making the wiring space narrower and making wiring more difficult. High-density wiring becomes impossible.

Another problem is that when a multilayer structure is created due to an increase in the number of circuits, the connection mechanism between layers becomes complicated.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a flat wire harness with a laminated structure that allows high-density wiring of electric wires and facilitates interlayer connections.

[Means to solve the problem]

In order to achieve the above-mentioned object, the flat wire harness of the present invention comprises a long insulating sheet, a plurality of junction bars arranged in parallel to the circuit board, and a connector provided at one end or both ends of the bars. A plurality of relay circuit boards are arranged in parallel in two or more rows at predetermined intervals, and electric wires are routed between desired relay circuit boards within each row and between each row to connect desired junction bars. A circuit is formed that conducts with the connector, and the insulating sheet is folded back in the middle of each row to form a laminated structure.

[For production]

In the flat wire harness according to the present invention, wiring is performed by arranging a plurality of relay circuit boards in two or more rows on two insulating sheets, so the space is wide and the degree of freedom in wiring is increased. Moreover, high-density wiring is possible.

Moreover, since the connection between the eyebrows is also made within one plane on the insulating sheet, wiring is extremely simple.

Hereinafter, the above configuration and operation will be specifically explained with reference to drawings showing examples.

〔Example〕

Fig. 1 is a perspective view of the wiring state of the flat wire harness according to the present invention, Fig. 2 is a sectional view taken along line nn of Fig. 1, and Fig. 3 is a state in which the flat wire harness of Fig. 1 is folded and stacked. A perspective view is shown.

Note that the same reference numerals are used for the same or similar constituent members as in the conventional example to simplify the explanation.

In these figures, on the wiring board 20, there are a plurality of relay circuit boards 2A, 2A'2A'', . . . in two horizontal rows, A row and B row.
Groups of relay circuit boards 2B, 2B', 2B'', etc. are arranged.A folding margin d with an appropriate interval is left between rows A and B, and adjacent relay circuits are arranged between rows A and B. The plates 2A and 2B, 2A' and 2B', . . . are arranged alternately so that overlapping does not occur due to folding.

Reference numeral 21 denotes a wide and long insulating sheet that covers the groups of relay circuit boards in rows A and B, and has a plurality of slits 22 corresponding to the arrangement of the junction bars 4 on each relay circuit board. The tip of the press-contact terminal portion 4b is exposed.

The covered type wA7 for interconnecting the group of relay circuit boards is wired in the same manner as in the past by the automatic wiring machine IO shown in FIG. For example, the covered wire 7I is connected to the relay circuit boards 2A, 2A' in A row,
2A”, the covered wire 7□ is connected to the relay circuit board 2B in row B.
, 2B', 2B'', the covered type m't is between A column and B
The two relay circuit boards in the column, 2A' and 2B', are connected to each other.

In this way, the covered wires 7 are routed between the specified junction bars 4 on desired relay circuit boards in the same row and in different rows, and are press-connected.

a row A in which a desired circuit is formed by wiring the covered 1 wire 7;
B relay circuit boards 2A, 2A', 2A''...group and 2
B, 2B', 2B''... groups are the insulating sheets 2
1 is folded back at the folding distance d in FIG. 2 to obtain a flat wire harness W having a two-layered structure as shown in FIG. 3.

Note that it is preferable to sandwich another insulating sheet (not shown) between the overlapping surfaces of the rows A and B to avoid leakage between the terminal pressure contact portion 4b and the covered wire 7. Further, as shown in FIG. 3, a two-layer flat wire harness W may be fixed on a rigid insulating plate 23.Furthermore, as shown in FIG. By folding and overlapping each other, a laminated structure of three or more layers can be obtained.

The above is a common insulating sheet 21 with two rows of relay circuit boards 2A,
2A', 2A"1 group and 2B, 2B', 2B'...
Although we have described an example in which the relay circuit boards are placed on top of a group, as shown in FIG.
There is no problem with the method of shipping.

〔Effect of the invention〕

As described above, according to the present invention, a flat wire harness having a multilayer laminated structure with high wiring density of electric wires and easy interlayer connection can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the flat wire harness according to the present invention in a wiring state, Fig. 2 is a sectional view taken along line nn in Fig. 1, and Fig. 3 is a perspective view of the flat wire harness in Fig. 1 in a laminated state. , Fig. 4 is an explanatory diagram of a conventional flat wire harness, Fig. 5 is an exploded perspective view of the relay circuit board of Fig. 4, and Fig. 6 is an explanatory diagram of a method of covering the flat wire harness of Fig. 4 with a protective sheet. It is. W...Flat wire harness, 2.2', 2" 2A
, 2A', 2A'', 2B, 2B', 2B''・
... Relay circuit board, 3... Circuit board, 4... Junction bar, 4b... Pressure contact terminal section, 5, 5'... Connector, 7.71-7. ... Covered electric wire, 21 ... Insulation sheet.

Claims (1)

[Claims] A plurality of relay circuit boards each having a plurality of junction bars arranged in parallel to the circuit board and a connector provided at one end or both ends of the bars are arranged in two or more rows at a predetermined interval on a long insulating sheet. and wires are routed between desired relay circuit boards within each column and between each column to connect desired junction bars to form a circuit that is electrically connected to the connector, and the insulating sheet is connected to each column. A flat wire harness characterized by being folded back in the middle to form a laminated structure.