JPH1131426A - Method of forming wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform the terminal fitting work with machine and to easily provide a shield wire by connecting a terminal to each end of plural wires, binding the wires and forming a metal layer in the periphery of the bound wires. SOLUTION: A terminal of each wire 10 is fixed in a connector housing 30 by an automatic terminal inserting machine. A periphery of the bound wires 10 is formed with a metal layer 40 provided in the vertical direction so that a band-like metal foil, of which inside is coated with the adhesive agent at both sides thereof, and a drain wire contact with each other through the adhesive agent in the perfect contact condition. A part of the drain wire, which is not coated with the metal layer 40, is insulated by a tape 15 so as to eliminate the exposed part of a conductor. A plastic tape is wound around the periphery of the metal layer 40 so as to form a sheath layer. The sheath layer can be formed thinner than in the case where the sheath layer is formed by extrusion, by winding the plastic tape so as to form the sheath layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a wire harness having a metal phase on the outer periphery of an electric wire bundle in which a plurality of electric wires are bundled.

[0002]

2. Description of the Related Art In some cases, for example, a shielded electric wire is used for a part of wiring in an automobile.

[0003] This shielded electric wire is obtained by twisting a core wire and a drain wire, winding a metal foil tape around the outer periphery thereof to form a metal layer, and extruding a plastic sheath around the outer periphery.

In the case where such a shielded electric wire is used for a part of wiring in an automobile, conventionally, the shielded electric wire is measured and cut to a predetermined length, and then the sheath and the metal layer are cut to a predetermined length. After removal, the core wire and the drain wire were exposed, and then terminals were connected to the ends of the core wire and the drain wire, respectively.

[0005]

However, in the method of connecting the terminals to the ends of the core wire and the drain wire after removing the sheath and the metal layer of the shielded wire, the terminal connection operation must be performed manually. In addition, there is a problem that the work is troublesome. In other words, since the length of the core wire and the drain wire, which removes the sheath and the metal layer and is exposed from the ends, is short, the terminal attaching work cannot be performed by a machine. It is something that must be done.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to provide a method of forming a wire harness which can efficiently perform a terminal attaching operation with a machine. A plurality of wires with terminals connected to the portion, a method of forming a wire harness comprising a metal layer formed on the outer periphery of the plurality of wires, first connecting the terminals to the ends of the plurality of wires, Next, there is provided a method for forming a wire harness, comprising: bundling a plurality of wires connected to terminals, and then forming a metal layer on the outer periphery of the bundled wires (claim 1).

Further, in the method for forming a wire harness according to the first aspect, a step of inserting terminals respectively connected to the ends of the plurality of electric wires into the connector housing is added. Item 2).

If the terminal is first connected to the end of the electric wire as in the first aspect of the present invention, the terminal attaching operation can be easily performed by a machine. When a plurality of electric wires to which the terminals are connected are bundled and a metal layer is formed on an outer periphery thereof, a shielded electric wire or a steel strip armored electric wire can be easily obtained.

According to a second aspect of the present invention, when a step of connecting the terminals to the ends of the plurality of electric wires and then inserting the terminals into the connector housing is added, not only the terminals but also the connector housing is provided. A shielded electric wire or a steel strip armored electric wire can be easily obtained.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. 1 to 7 are explanatory views showing the steps of manufacturing the shielded electric wire with terminal of the present invention. First, as shown in FIG. 1, terminals 20 are connected to both ends of each electric wire 10 cut to a predetermined length using a machine such as an automatic cutting press machine. In FIG. 1, reference numeral 11 denotes a core wire coated with a conductor, and reference numeral 12 denotes a drain wire exposing the conductor. In this embodiment, a bare wire is used.

Next, as shown in FIG. 2, the terminal 20 is inserted into the connector housing 30 and fixed. The operation of inserting and fixing the terminal 20 into the connector housing 30 can be performed continuously after the terminal attaching operation using a machine such as an automatic terminal insertion machine. This allows terminal 2
Thus, the electric wire 10 having the connector housing 30 and the connector housing 30 can be obtained.

Next, as shown in FIG. 3, an arbitrary length of the terminal portion of the drain wire 12 is insulated using a tape 15.
In addition, after the terminal portion of the drain wire 12 is insulated,
May be inserted into the connector housing 30 and fixed.
After the insulation treatment, it is preferable to wind the end of the tape 15 around the coating layer of the core wire 11 because the end of the tape 15 is more securely fixed.

Next, as shown in FIG.
Bundling. In addition, when bundling a plurality of electric wires 10, it is preferable to apply twist, since each of the electric wires 10 becomes difficult to be separated and is easily processed later. In order to bundle the wires 10 by twisting the wires 10, the wires 10 on both sides near the connector housing 30 may be grasped and the wires 10 on both sides may be rotated in opposite directions.

Next, as shown in FIG. 5, a metal layer 40 is formed on the outer periphery of the bundled electric wires 10. As the metal layer 40, a band-shaped metal foil 41 as shown in FIG. 6 having an adhesive 42 applied to the inside of both sides is used, and the metal foil 41 and the drain wire 12 are bundled so as to be in contact with each other. The metal foil 41 and the drain wire 12 are securely formed by vertically attaching to the outer periphery of the wire 10 and bonding an adhesive 42 applied to the inside of both sides. The portion of the drain wire 12 not covered by the metal layer 40 is insulated by the tape 15, so that the conductor is not exposed.

Finally, as shown in FIG. 7, a plastic tape is wound around the outer periphery of the metal layer 40 to form a sheath layer 50. When the sheath layer 50 is formed by winding a plastic tape, there is an advantage that the thickness of the sheath layer can be reduced as compared with the case of extrusion molding.

In the above embodiment, the electric wire 1
After the terminal 20 was connected to the connector housing 30, the terminal was inserted into the connector housing 30. The operation of inserting the terminal 20 into the connector housing 30 was performed after forming the metal layer 40 or wrapping a plastic tape to form a sheath. It may be performed later. If not necessary, the connector housing 30 may not be used. In addition, the metal layer 40
It may be formed by winding a metal tape. At this time, the winding direction of the metal tape is preferably wound in the direction opposite to the twisting direction of the electric wire 10. The reason is that the electric wire 10
When the metal tape is wound in the same direction as the twisting direction of the wire, there is a risk that the wrapped portion of the metal tape may be opened due to the force to return the twist acting on the wire, This is because when wound, the lap winding portion of the metal tape becomes difficult to open. Further, in the above embodiment, the core wire 11 and the drain wire 12 are used as the electric wire 10, but the drain wire may not be used, and the core wire alone may be used as the steel strip armored wire. In this case, the metal layer 4
Numeral 0 has a role as a protective layer for protecting the electric wire 10 from external force or the like.

FIG. 8 shows a metal layer 40 on the outer periphery of two electric wires 10.
FIG. 4 is an explanatory view of a state in which a wire and a sheath layer 50 are spirally wound and continuously formed. In FIG. 8, reference numeral 60 denotes a gripper for gripping both ends of the electric wire 10 and rotating the same in the direction A. A terminal is attached to an end of the electric wire 10 in advance. Reference numeral 61 denotes a shaft.
Are arranged in parallel with the electric wire 10. A metal tape 70 and a plastic tape 80 are arranged on the shaft 61 at a predetermined interval and are movable in the longitudinal direction of the shaft 61, that is, in the B direction.

In order to form the metal layer 40 and the sheath layer 50 on the outer periphery of the electric wire 10 using the above-described apparatus, both ends of the electric wire 10 are gripped by the gripping tool 60 and rotated in the direction A, and the metal tape 70 and the plastic The tape 80 may be moved in the B direction. Thereby, as shown in FIG. 9, the metal layer 40 and the sheath layer 50 can be easily formed on the outer periphery of the two electric wires.

[0019]

As described above, the method for forming a wire harness according to the present invention comprises a plurality of electric wires having terminals connected to ends and a metal layer formed on the outer periphery of the plurality of electric wires. A method of forming a wire harness, in which a terminal is connected to each end of a plurality of wires, then a plurality of wires connected to the terminal are bundled, and then a metal layer is formed on the outer periphery of the bundled wires. A method for forming a wire harness, characterized in that: Therefore, the terminal attaching operation can be easily performed by a machine, and the shielded electric wire can be easily obtained. In addition, since shielded wires in which the number of core wires is freely changed can be formed each time as needed, it is not necessary to prepare shielded wires in which the number of core wires is changed in advance, which contributes to inventory reduction.

Further, by adding a step of inserting the terminals respectively connected to the ends of the plurality of electric wires into the connector housing (claim 2), a wire harness having not only the terminals but also the connector housing can be easily obtained. be able to.

[Brief description of the drawings]

FIG. 1 is a side view of a state where terminals are connected to a plurality of electric wires.

FIG. 2 is a perspective view showing a state where a terminal is inserted into a connector housing.

FIG. 3 is a perspective view of a state where a drain wire is insulated.

FIG. 4 is a perspective view of a state where a plurality of electric wires are twisted.

FIG. 5 is a perspective view showing a state in which a metal layer is provided on the outer periphery of a plurality of electric wires.

FIG. 6 is a perspective view of a metal layer.

FIG. 7 is a perspective view showing a state where a sheath layer is provided.

FIG. 8 is an explanatory view showing a state where a metal layer and a sheath layer are formed on the outer periphery of the electric wire.

FIG. 9 is a sectional view of the shielded electric wire formed in FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electric wire 11 Core wire 12 Drain wire 20 Terminal 30 Connector housing 40 Metal layer 50 Sheath layer

Claims (2)

[Claims] A plurality of electric wires having terminals connected to ends thereof;
What is claimed is: 1. A method for forming a wire harness comprising a metal layer formed on an outer periphery of a plurality of electric wires, wherein first, terminals are respectively connected to ends of the plurality of electric wires, and then the plurality of electric wires connected to the terminals are bundled. A method for forming a wire harness, comprising forming a metal layer on the outer periphery of a plurality of electric wires bundled thereafter. 2. The method for forming a wire harness according to claim 1, further comprising a step of inserting terminals respectively connected to ends of the plurality of electric wires into the connector housing.