JPH06176633A - Shielding method for wire harness - Google Patents

Abstract

PURPOSE:To very easily shield wire harness. CONSTITUTION:The coating of conductive resin 4 is formed on a coated electric wire 1 by an extruder 2 to constitute a shield electric wire 6, and plural shield electric wires 6 are bundled to form shield-attached wire harness. Consequently, wire harness, having each core shield constitution can be very easily provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention relates to an electronic device, a copy,
The present invention relates to a wire harness shielding method for shielding a wire harness used in an automobile or the like.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 8, a case where an electromagnetic shield is applied to the outside of a wire harness 3 in which connectors 2 are connected to both ends of a plurality of covered electric wires 1 bundled with tape or the like, is shown in FIG. As described above, the wire harness 3 is shielded by inserting the wire harness 3 into the braided tube 4 prepared in advance.

As described above, the technique for inserting the wire harness into the braided tube is, for example, the actual flat wire 3-120624.
It is disclosed in Japanese Patent Publication No.

[0004]

However, in the conventional shielding method, the wire harnesses 3 must be inserted one by one into the braided tube 4, which is very troublesome.

Therefore, the present invention has been made to solve the above problems, and an object thereof is to make it possible to shield a wire harness extremely easily.

[0006]

According to a first aspect of the present invention, there is provided a wire harness shielding method in which an insulating resin is kneaded with a fine conductive material such as metal powder or metal fiber in a coated electric wire having an insulating coating. It is characterized in that a shield made of a conductive resin is formed by an extruder to form a shielded electric wire, and a plurality of the shielded electric wires are bundled to form a wire harness.

Further, as in the invention described in claim 2, after forming a resin coating on the conductor, a conductive paint is attached to the coating to form a shielded electric wire, and a plurality of the shielded electric wires are bundled to form a wire. Forming a harness is also effective.

Further, as described in claim 3, after forming a wire harness by bundling a plurality of covered electric wires each having a conductor coated with a resin, a conductive paint is applied to each of the covered electric wires of the wire harness. You may shield.

[0009]

According to the first aspect of the present invention, a shielded electric wire is formed by forming a coating of conductive resin on the covered electric wire by an extruder, so that a plurality of the shielded electric wires can be bundled with a tape or the like to provide a shielding effect. The wire harness that has is obtained.

According to the second aspect of the present invention, a conductive wire is adhered to the resin coating to form a shielded electric wire, so that a wire harness having a shielding effect can be obtained by simply bundling a plurality of the shielded electric wires with tape or the like. Is obtained.

Further, according to the third aspect of the invention, the wire harness is shielded by bundling the covered electric wires coated with the resin to form the wire harness and applying the conductive paint to the wire harness. It will be possible.

[0012]

【Example】

(First Embodiment) FIG. 1 is a schematic explanatory view of a first embodiment of a method for shielding a wire harness of the present invention, FIG. 2 is a perspective view of a part of a shielded electric wire, and FIG. 3 is a front view of a manufactured wire harness. 4 is a sectional view of FIG.

As shown in FIG. 1, a covered electric wire 1 having an insulating coating is introduced into a crosshead 3 of an extruder 2 and a conductive resin 4 heated and kneaded with a screw is inside the crosshead 3. Then, the shielded electric wire 4 is formed on the covered electric wire 1 to form the shielded electric wire 6, which is cooled in the cooling tank 7, and then the shielded electric wire 6 is taken up by the take-up roller 8.

By the way, the conductive resin 4 is made of PVC [Pol.
y Vinyl Chloride; vinyl chloride] or the like is used as a base, and metal powder or metal fiber such as carbon, copper, or aluminum is kneaded with the resin.

The cross section of the shielded electric wire 6 thus obtained is as shown in FIG. 2, and the insulating coating 10 made of an insulating material is formed around the plurality of conductors 9.
Further, a conductive resin coating 5 is formed around it, and the thickness of the coating 5 at this time is preferably about 0.05 to 2.0 mm.

Further, as shown in FIG. 3, the insulating tape 1
A plurality of such shielded electric wires 6 are bundled by 1 and the connectors 12 are connected to both ends thereof to form a shielded wire harness 13, the cross section of which is as shown in FIG.

Therefore, the conductive resin coating 5 is applied by the extruder 2.
Forming a shielded electric wire 6 by forming the coated electric wire 1 on the covered electric wire 1 and bundling a plurality of the electric wires together, a wire harness 13 having a shielding effect can be obtained. As compared with the case where the wire harness is used, the wire harness can be shielded extremely easily, and the work efficiency can be improved.

Further, the shielded wire harness 13
Since each shielded electric wire 6 constituting the above is shielded by the conductive resin coating 5 and has a so-called core shield structure, it is possible to shield up to the end of each shielded electric wire 6 which is the connecting portion with the connector 12, The influence of noise from can be reliably prevented.

Further, since the coating 5 is formed of the conductive resin, there is no disconnection in the shield portion such as a shield using a braid or a metal foil, and the shield effect can be reliably maintained.

(Second Embodiment) FIG. 5 is a schematic explanatory view of a second embodiment of the present invention.

As shown in FIG. 5, the conductor 9 is introduced into the crosshead 3 of the extruder 2, and the conductor 9 is covered with the insulating resin 21 to form the covered electric wire 22.
2 passes through the cooling tank 7 and then the filling tank 2 for the conductive paint 23
4, the coated electric wire 22 is coated with the conductive paint 23 to form a shielded electric wire 25. A plurality of the shielded electric wires 25 are bundled with an insulating tape or the like to form a wire harness.

By the way, when a connector is connected to both ends of each shielded electric wire 25 of such a wire harness, an insulating tape or a rubber plug is attached to the crimping portion of the crimping terminal in order to insulate it from the coating of the conductive paint 23. Then, the connector is connected.

Therefore, according to the second embodiment, the same effect as that of the first embodiment can be obtained.

(Third Embodiment) FIG. 6 is a schematic explanatory view of a third embodiment of the present invention.

As shown in FIG. 6, a plurality of covered electric wires 31 each having a conductor coated with an insulating resin are bundled together, and a connector 32 is connected to both ends thereof to form a wire harness 33. The portion of the covered electric wire 31 of the wire harness 33 is immersed in the filling tank 35 filled with the paint 34, and the covered electric wire 31 is covered with the conductive paint 34 to shield the wire harness 33.

Therefore, according to the third embodiment, the wire harness 33 can be shielded very easily as in the first embodiment.

Further, by immersing the covered electric wires 31 of the wire harness 33 in the conductive paint 34 in a separated state, a shielding effect close to that of each core shield can be obtained.

(Fourth Embodiment) FIG. 7 is a schematic explanatory view of a fourth embodiment of the present invention.

As shown in FIG. 7, the connector 32 of the wire harness 33 formed similarly to the case of the third embodiment is covered with the cover 41, and then the wire harness 33 is formed.
The conductive paint is sprayed and applied to each of the covered electric wires 31 by a spray 42 filled with the conductive paint,
The conductive harness coating is formed to shield the wire harness 33.

Therefore, according to the fourth embodiment, the same effect as that of the third embodiment can be achieved.

The method of applying the conductive paint is not limited to the method shown in FIGS.

[0032]

As described above, according to the first aspect of the present invention, by forming a shielded electric wire by forming a coating of a conductive resin on a covered electric wire by an extruder, a plurality of the shielded electric wires can be formed by a tape or the like. A wire harness having a shielding effect can be obtained simply by bundling, and the wire harness can be shielded extremely easily. Moreover, since each core is shielded, the wire harness shields up to the end of the wire portion. The effect can be reliably maintained.

According to the second and third aspects of the invention, the wire harness can be shielded very easily by forming the coating of the conductive paint.

[Brief description of drawings]

FIG. 1 is a schematic explanatory diagram of a first embodiment of a wire harness shielding method of the present invention.

FIG. 2 is a perspective view of a part of the shielded electric wire in FIG.

FIG. 3 is a front view of the wire harness manufactured in the first embodiment.

4 is a cross-sectional view of FIG.

FIG. 5 is a schematic explanatory diagram of a second embodiment of the present invention.

FIG. 6 is a schematic explanatory view of a third embodiment of the present invention.

FIG. 7 is a schematic explanatory diagram of a fourth embodiment of the present invention.

FIG. 8 is a front view of a general wire harness.

FIG. 9 is a schematic explanatory diagram of a conventional shield method for a wire harness.

[Explanation of symbols]

 1,2,31,25 Coated electric wire 2 Extruder 4 Conductive resin 6 Shielded electric wire 9 Conductor 10 Insulation coating 13 Wire harness with shield 21 Insulating resin 23,34 Conductive paint 33 Wire harness

Claims (3)

[Claims] 1. A shielded electric wire is constructed by forming a coating made of a conductive resin obtained by kneading an insulating resin with a minute conductive material such as metal powder or metal fiber on a coated electric wire having an insulating coating formed by an extruder. 2. A method for shielding a wire harness, comprising bundling the shielded electric wires to form a wire harness. 2. A shielded electric wire is formed by forming a resin coating on a conductor and then applying a conductive paint to the coating.
A method for shielding a wire harness, comprising forming a wire harness by bundling a plurality of the shielded electric wires. 3. A wire, comprising: bundling a plurality of covered electric wires each having a conductor coated with a resin to form a wire harness, and applying a conductive paint to each of the covered electric wires of the wire harness to shield the wire. How to shield the harness.