JP2002157925A - Cable for flat harness and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable for flat harness and its manufacturing method capable of realizing a thinner shape, having a larger current capacity, and reducing the manufacturing cost as compared with that using stranded wires as conductors by simply changing the structure of the conductors. SOLUTION: This flat harness comprises a lower insulating film 1 coated with an adhesive 11 on the upper face, conductors 3 arranged on the lower insulating film 1 to extend along the prescribed wiring pattern, and an upper insulating film 2 arranged to face the lower insulating film 1 via the conductors 3 and coated with an adhesive 21 on the lower face facing the conductors 3. The conductors 3 are covered (laminated) with the upper face of the lower insulating film 1 and the lower face of the upper insulating film 2, and the conductors 3 comprise a plurality of single wires 31 made of a conductive material. A plurality of single wires are arranged on the upper face of the lower insulating film 1 so that adjacent single wires are kept in close contact with each other in parallel on the upper face of the lower insulating film 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat harness cable having a flat structure, and more particularly to a flat harness cable applied to an automobile harness or the like.

[0002]

2. Description of the Related Art Among wire harnesses for automobiles, there is a flat harness having a particularly flat structure.
The flat harness is configured using a flat cable, a flexible flat cable (FFC), a flexible printed circuit (FPC), and the like. The flat cable has a structure in which a conductor is formed of a stranded wire, and several conductors are arranged in parallel and covered. In the case of a flexible flat cable, a copper plate material is punched out with a die to form a wiring pattern, and then an insulating film is laminated from above and below, and unnecessary portions are punched out again using a die to form an outer shape. In the case of a flexible printed circuit, an etching process is performed on a copper foil laminate to remove unnecessary copper foil, and then a laminate process is performed using a coverlay. Thereafter, unnecessary portions are punched out by a mold to form an outer shape.

[0003]

However, in the case of a flat cable, since the conducting wire is a stranded wire, the heat radiation area with respect to the sectional area is small, and the amount of current that can flow is small. In addition, the cross-sectional area of the conductor is likely to be large, and the weight and the required space of the entire flat cable are increased. Further, in the FFC and the FPC, since a copper plate material is punched out by a die or a copper foil is etched to form a conductor pattern, there is a problem that a large amount of material is wasted, thereby increasing the cost.

[0004] The present invention has been made in view of the above-mentioned problems, and a simple structure change of a conductor can realize a more space-saving and larger current capacity than a case where a stranded wire is used for the conductor. An object of the present invention is to provide a cable for a flat harness which has a reduced manufacturing cost and a method for manufacturing the same.

[0005]

A flat harness cable according to the present invention is characterized in that a conductor consisting of a plurality of single wires arranged on the same plane along the longitudinal direction is covered with an insulating material. I do.

According to the present invention, by using a single wire as the conductor and laying the single wire along the longitudinal direction of the cable, a thinner shape can be realized as compared with a case where a stranded wire is used for the conductor. A flat harness cable having a large current capacity and capable of reducing manufacturing costs can be provided.

Preferably, the plurality of single wires are arranged on the same plane so that adjacent single wires are parallel to each other and close to each other.

[0008] The conductor consisting of the plurality of arranged single wires may be covered with the insulating material from both sides, or may be embedded in the insulating material.

The conductor is preferably composed of a plurality of single wires having the same diameter, but may include at least two types of single wires having different diameters according to the current capacity.

[0010] Further, in order to correspond to a plurality of circuits, it is desirable that a plurality of the conducting wires each composed of a plurality of single wires are arranged on the same plane along the longitudinal direction.

A method for manufacturing a cable for a flat harness according to the present invention comprises the steps of arranging a plurality of single wires made of a conductive material on the same plane along a longitudinal direction, and covering the arranged plurality of single wires with an insulating material. And a step of performing

Preferably, the step of arranging the plurality of single lines is a step of arranging the plurality of single lines on the same plane so that adjacent single lines are parallel to and close to each other.

The covering step may be a step of laminating the arranged single wires from both sides with an insulating material, or a step of embedding the arranged single wires in an insulating material by extrusion. good.

Prior to the step of arranging the plurality of single wires, it is preferable that the method further includes a step of drawing the copper wire using a die to obtain the single wires.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments according to the present invention will be described below with reference to the accompanying drawings. FIG.
It is a perspective view showing an outline of a cable for flat harnesses concerning a 1st embodiment of the present invention. As shown in the figure, the flat harness cable according to the present embodiment has a lower insulating film 1 having an adhesive 11 applied to the upper surface thereof and an upper surface of the lower insulating film 1 extending along the longitudinal direction of the cable. A conductive wire 3 to be wired, and a lower surface facing the lower insulating film 1 via the conductive wire 3 and an adhesive 2
1 is applied to the upper insulating film 2. Here, the conducting wire 3 is covered (laminated) with the upper surface of the lower insulating film 1 and the lower surface of the upper insulating film 2.
And the conducting wire 3 is composed of a plurality of single wires 31 made of a conductive material. The plurality of single wires are arranged on the upper surface of the lower insulating film 1 such that adjacent single wires are parallel on the upper surface of the lower insulating film 1 and are in close contact with each other.

FIG. 2 is a perspective view showing an outline of a flat harness cable according to a second embodiment of the present invention.
Hereinafter, the same portions as those of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. This embodiment differs from the above-described first embodiment in the manner of covering the conductive wire 3 composed of a plurality of single wires 31 arranged. As shown in the figure, in this embodiment, the arranged conductors 3 are embedded in an insulating material 9.

FIG. 3 is a flowchart showing a process of a method for manufacturing a flat harness cable according to the first embodiment of the present invention. Hereinafter, a method of manufacturing the flat harness cable according to the present embodiment will be described. First, in order to obtain a single wire 31 used for the flat harness cable according to the present invention, as shown in FIG. (S11). Single wire 3 obtained in this way
No. 1 has a uniform diameter with high precision and an oxide film on the surface is removed. Next, an assembling process of the single wires 31 is performed so that the single wires 31 are arranged on the same plane along the longitudinal direction of the cable (S12). In order to cover the conductive wire 3 composed of the plurality of single wires 31 arranged in FIG.
As shown in FIG. 6 showing a cross-sectional view in the direction A ′, adjacent single lines are arranged in parallel on the same plane using the sub-guide G and the guide 7 so as to be in close contact with each other. At this time, the single wires 31 satisfying the predetermined current capacity are arranged on one conductor 3 so that the predetermined current capacity required for the conductor 3 can be satisfied. Next, a lamination process is performed as shown in FIG. 7 in order to cover the conductive wires 3 composed of the plurality of single wires 31 arranged in this manner from both sides with an insulating material (S13). As shown in the figure, the conducting wire 3 composed of a plurality of single wires 31 arranged in the assembling step is sent in a longitudinal direction (an arrow direction in the figure) at a predetermined feed speed,
A feed roll F for supplying the upper insulating film 2 and the lower insulating film 1 having the adhesives 21 and 11 applied to the surface facing the conductive wire 3 in synchronization with the feed speed of the conductive wire 3; The conductive wire 3 is coated (laminated) by the roll L to be added. FIG. 8 shows a sectional view of a flat harness cable manufactured by the same manufacturing method.

Next, a method of manufacturing a flat harness cable according to a second embodiment of the present invention will be described.
Hereinafter, the same portions as those already described are denoted by the same reference numerals, and description thereof will be omitted. FIG. 9 is a flowchart illustrating a process of a method for manufacturing a flat harness cable according to the present embodiment. The difference between the method for manufacturing the flat harness cable according to the present embodiment and the method for manufacturing the flat harness cable according to the first embodiment is that the conductor 3
In the step of coating. In the present manufacturing method, as shown in FIG. 10, the conductor 3 is buried in an insulating material 9 such as a molten resin by using an extruder 8 with respect to the conductor 3 which is guided into the guide 7 and arranged. Perform coating. FIG. 11 shows a sectional view of a flat harness cable manufactured by the same manufacturing method.

According to the present invention, by using a plurality of single wires for the conductor, a thinner shape can be realized as compared with the case of using a twisted wire for the conductor, and the number of single wires used for the conductor is increased or decreased. Accordingly, it is possible to provide a flat harness cable that can easily adjust the current capacity of the conductive wire and can reduce the manufacturing cost.

Further, the flat harness cable according to the present invention can cope not only with the case where the diameters of the single wires used for the conductive wires are the same but also with the case where the diameters of the single wires are different.

Here, by increasing or decreasing the number of single wires used for one conductor in accordance with a predetermined current capacity, a single type of single wire can cope with a wide range of current capacity, leading to cost reduction.

Of course, the number of circuits is not limited to one, and several circuits can be mixed.

[0023]

As described above, according to the present invention, by using a single wire as a conductor and laying the single wire along the longitudinal direction of the cable, compared with a case where a stranded wire is used as a conductor. It is possible to provide a cable for a flat harness and a method of manufacturing the same, which can realize a thinner shape, have a large current capacity, and can reduce the manufacturing cost.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an outline of a flat harness cable according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing an outline of a flat harness cable according to a second embodiment of the present invention.

FIG. 3 is a flowchart illustrating a method for manufacturing a flat harness cable according to the first embodiment of the present invention.

FIG. 4 is a diagram for explaining a method of manufacturing the flat harness cable according to the first embodiment of the present invention.

FIG. 5 is a diagram for explaining a method of manufacturing the flat harness cable according to the first embodiment of the present invention.

FIG. 6 is a diagram for explaining a method of manufacturing the flat harness cable according to the first embodiment of the present invention.

FIG. 7 is a diagram for explaining a method of manufacturing the flat harness cable according to the first embodiment of the present invention.

FIG. 8 is a sectional view of the flat harness cable according to the first embodiment of the present invention.

FIG. 9 is a flowchart illustrating a method for manufacturing a flat harness cable according to a second embodiment of the present invention.

FIG. 10 is a view for explaining a method of manufacturing a flat harness cable according to the second embodiment of the present invention.

FIG. 11 is a view illustrating a method for manufacturing a flat harness cable according to the second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Lower insulating film, 11 ... Adhesive, 2 ... Upper insulating film, 21 ... Adhesive, 3 ... Lead wire, 31 ... Single wire, 5 ... Dice, 6 ... Elementary wire, 7 ... Guide, 8 ... Extruder 9: insulating material, F: feed roll, G: sub guide, L: roll.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasuo Takemura 1440, Mukurosaki, Sakura City, Chiba Prefecture Inside Fujikura Sakura Office (72) Inventor Ichiro Terunuma 1440, Musaki, Sakura City, Chiba Prefecture Inside Fujikura Sakura Office F-term (reference) 5G309 AA01 LA24 LA25 5G311 CA05 CB02 CC01 CC02 CD03 CD05

Claims (12)

[Claims] 1. A cable for a flat harness, comprising a plurality of single wires arranged on the same plane along a longitudinal direction and covered with an insulating material. 2. The flat harness according to claim 1, wherein the plurality of single wires are arranged on the same plane so that adjacent single wires are parallel to each other and close to each other. Cable. 3. The flat harness cable according to claim 1, wherein the plurality of arranged single wires are covered with the insulating material from both sides. 4. The cable for a flat harness according to claim 1, wherein the conductor composed of the arranged single wires is embedded in the insulating material. 5. The flat harness cable according to claim 1, wherein the conductive wire is formed of a plurality of single wires having the same diameter. 6. The conductive wire has at least two different diameters.
The cable for a flat harness according to any one of claims 1 to 4, wherein the cable includes one type of single wire. 7. A plurality of conductors are arranged on the same plane along a longitudinal direction.
The cable for a flat harness according to any one of the preceding claims. 8. A method comprising: arranging a plurality of single wires made of a conductive material on the same plane along a longitudinal direction; and covering the arranged plurality of single wires with an insulating material. Manufacturing method for flat harness cables. 9. The step of arranging the plurality of single wires is a process of arranging the plurality of single wires on the same plane and adjacent single wires are parallel to each other and closely contact with each other. The method for producing a flat harness cable according to claim 8. 10. The flat harness cable manufacturing method according to claim 8, wherein the covering step is a step of laminating the arranged single wires from both sides with an insulating material. 11. The method according to claim 8, wherein the step of covering is a step of embedding the arranged single wires in an insulating material by extrusion. 12. The method according to claim 8, further comprising, prior to the step of arranging the plurality of single wires, performing a drawing process on a copper strand using a die to obtain the single wires. 12. The method for manufacturing a flat harness cable according to any one of claims 11 to 11.