JPH06176803A - Wire harness - Google Patents

Abstract

PURPOSE:To provide a wire harness that can be manufactured with a few processes and with high efficiency, and further can be applicable to automation easily. CONSTITUTION:A metal foil polyester-laminated tape, as shielding material 4, is longitudinally lapped on an insulating coated wire 3 so as to form a shielded wire 5. Plural shielded wires 5 are combined, and a vinyl tape is wound thereon as insulating material 6 so as to form an insulating coating. Further, terminals are connected to both ends of the respective shielded wires 5. One part of the insulating material 6 is peeled off with a fixed width, and the part is held by a conductive clamp 7, which is electrically connected to an earth circuit formed in a housing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire harness having a shielding effect used in electronic devices, automobiles and the like.

[0002]

2. Description of the Related Art Generally, a wire harness is a bundle of a plurality of insulation-coated electric wires having terminals or connectors connected to their ends. Wire harnesses used in electronic devices and automobiles are In order to suppress the influence of noise from inside or outside, as shown in FIG.
A wire is used in which the insulating covered electric wire 51 is covered with a shield material such as a braided tape 52, and an insulating tape 53 is further wound on the shield material to provide an insulating shield.

In this type of wire harness, a terminal 54 is attached to the end portion 52a of the braided tape 52, and the terminal 54 is electrically connected to a ground circuit (not shown).

As the wire harness with the insulation shield, for example, as shown in FIGS. 16 to 17, a shielded electric wire 60 in which an insulation covered electric wire 61 is covered with a shield material 62 such as a braid or a horizontal winding shield is used. There is something.

As shown in FIGS. 17 and 18, a shielded electric wire 60 of this type is generally covered with an insulating sheath 63, and the insulating sheath 63 is stripped off at the end and the end thereof is removed. Shrink tube 64 for protection
Is attached. And this shrink tube 64
Terminals 65 are crimped to the respective ends of the insulation-coated electric wire 61 and the shield material 62 that are separately drawn from the terminal 6.
5 is connected to the connector 66 or the like.

[0006]

By the way, when a wire harness as shown in FIG. 15 is manufactured, a braided tape 52 in which, for example, a tin-plated copper wire is knitted in a strip shape is wound around the bundled insulation-coated electric wires 51. Furthermore, it is necessary to wind the whole with the insulating tape 53, which inevitably increases the number of processing steps.

Further, since the braided tape 52 is formed by braiding tin-plated copper wire as described above, the end portion 52a thereof is formed.
It is not possible to crimp the terminals with the automatic cutting and crimping device (a device for crimping the terminals 54 to the insulation-coated electric wire 51).

As described above, the use of the braided tape 52 is a major obstacle to automation of manufacturing the wire harness.

On the other hand, in the wire harness as shown in FIG. 16 to FIG. 18, it takes a lot of time to process the terminal shield of each shield wire 60, so that the production efficiency is lowered,
In particular, in a wire harness that uses a large number of shielded electric wires 60, the production efficiency is significantly reduced. Further, similarly to the above wire harness, there is a problem that it is difficult to support an automatic machine.

Therefore, an object of the present invention is to provide a wire harness which can be efficiently produced in a small number of steps and can be easily adapted to automation.

[0011]

In order to solve the above-mentioned problems, the wire harness of the present invention comprises a shielded wire bundle formed by bundling a plurality of shielded wires in which an insulating coated wire is covered with a metal foil having good conductivity. The shielded electric wire bundle is formed and covered with an insulating material, and a non-existing portion of the insulating material is provided in a part thereof, and the non-existing portion of the insulating material is gripped by a clamp having a conductive grip surface, The gripping surface of the clamp is electrically connected to a predetermined ground circuit.

Further, when the shielding performance is imparted only to a part of the electric wires constituting the wire harness, only the necessary electric wires are made the above-mentioned shielded electric wires and are bundled to form a shielded electric wire bundle. Like the above wire harness, the clamp may be gripped and the clamp may be grounded.

Furthermore, the clamp may be provided with a gripping portion for a non-shielded electric wire bundle that is not shielded, and one clamp may grip both the shielded electric wire bundle and the non-shielded electric wire bundle.

[0014]

[Operation] The wire harness configured as described above,
Since the shield materials of each shielded wire are in contact with each other, the shield materials of all shielded wires are electrically connected to the gripping surface of the conductive clamp, and the grounding circuit is provided at one place via this gripping surface. Electrically connected to.

Further, since each of the insulation-coated electric wires is covered with the shielding material, the troublesome process of covering the whole electric wire bundle with the braided tube or the like is unnecessary,
For the terminal connection of the shielded electric wire, the insulation coating and the metal foil are sequentially stripped off by a normal wire cutting and peeling device, and the terminal crimping process is performed by a normal terminal crimping device.

[0016]

EXAMPLES Examples will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, in this wire harness, an insulating coated electric wire 3 in which a core wire 1 is coated with an insulating resin is used as a shield material 4 with a metal foil polyester laminated tape having good conductivity. , Shielded wire 5 with vertical wrapping so that the metal foil is exposed
And a vinyl tape as an insulating material 6 is wrapped around the shielded electric wire bundle in which a plurality of the shielded electric wires 5 are bundled for insulation coating, and as shown in FIG.
The connector 9 is connected to both ends of the connector 9 for connection.

Then, a part of the insulating material 6 is stripped off in a constant width in the core wire direction of the shielded electric wire 5.
The stripped off portion is held by a clamp 7 made of a conductive material such as copper or iron.

The insulating material 6 does not necessarily have to be stripped off over the entire circumference of the shielded wire bundle, but may be stripped off only partially.

The clamp 7 comprises a ring-shaped gripping portion 7a for gripping the shielded electric wire 5 and a fixing portion 7b integrally provided on the gripping portion 7a, and the fixing portion 7b has a conductive screw. It is electrically connected to a ground circuit (not shown) formed in the case A by means of the like 8.

As shown in FIG. 3, in the shielded wire bundle, the shield materials 4 of the shielded wires 5 are in contact with each other. It is electrically connected to the ground circuit.

The clamp 7 may be formed of a conductive resin containing metal powder such as carbon or brass,
Further, as shown in FIG. 4, a metal foil 7c made of copper, aluminum or the like may be laminated from the grip surface of the clamp formed of a normal resin to the inner and outer surfaces of the fixed portion 7b.

The connection between the shielded electric wire 5 and the terminal 9 is
As shown in FIG. 5, first, a well-known electric wire cutting and stripping device strips off the insulating coating portion 2 at the end together with the shield material 4 to expose the core wire 1, and then strips only the shield material 4 with a constant width. Then, the terminal 9 is connected to the shielded electric wire 5 that has been subjected to the terminal treatment as described above by a known terminal crimping device. That is, the core caulking portion 9a and the covering gripping portion 9b of the terminal 9 are caulked and fixed to the exposed core wire 1 and the exposed insulating coating portion 2.

FIG. 6 shows another embodiment.

This wire harness has substantially the same construction as that of the above embodiment, but differs in that only a part of the electric wires used is shielded.

Therefore, it is divided into a non-shielded wire bundle 11 made of a normal insulated covered electric wire and a shielded electric wire bundle 12 in which an insulating covered electric wire is covered with a shield material, and only the shielded electric wire bundle 11 is covered with an insulating material 13. There is.

Further, the shielded wire bundle 12 covered with the insulating material 13 has the same insulating material 13 as in the above embodiment.
Is stripped with a constant width, and that portion is gripped by a conductive clamp 14 connected to a ground circuit.

The shielded wire bundle 12 and the unshielded wire bundle 11 are bound by a binding band 15.

Further, as shown in FIGS. 7 and 8, only the unshielded wire bundle 11 can be bound by the fastening binding band 16 and fixed to the housing A.

The fixing binding band 16 is made of synthetic resin, and is a band body 17 for binding electric wires.
And a fixing portion 18 for fixing the band body 17 to the housing A
It consists of and.

As shown in FIG. 8, the fixing portion 18 has a flexible hooking claw 18b that spreads rearward from the tip.
When the support 18a is provided with a support member 18a provided with a support member 18a and a holding member 18c extending from the base of the support member 18a to the left and right, and the support member 18a is inserted into a through hole a formed in the housing A, the latch claw 18b is Since the support 18a is pulled up when the pressing member 18c pushes the upper surface of the housing A by expanding after penetrating the housing A and performing the function of retaining, the unshielded member bound by the band body 17 is unshielded. The wire bundle 11 is securely fixed on the housing A.

FIG. 9 shows still another embodiment.

This wire harness has a shielded wire bundle 22 and a non-shielded wire bundle 21, and has the same construction as the above embodiment in that the shielded wire bundle 22 is held by a conductive clamp 23. , The clamp 2
3 in that the grip portion 24 of the unshielded electric wire 21 is provided.

As shown in FIG. 10, this clamp 23
Is to connect one divided portion of the half-divided cylindrical body forming the grip portion 24 of the unshielded electric wire 21 via the hinge 25, and connect the connecting plate 26 to each of the other divided portions.
The connecting plate 26 is connected to one of the divided portions of a half-divided cylindrical body forming the grip portion 27 of the shielded electric wire, and the plate-shaped fixing portion 28 is connected to the other divided portion. .

The connecting plate 26 has a through hole 26a on one side.
On the other side, a projection 26b is formed which engages with the through hole 26a and holds both connecting plates 26 in a close contact state.

Further, each fixing portion 28 is formed with a screw stop hole 28b.

Therefore, with the two grips 24 and 27,
By gripping the shielded wire bundle 22 and the unshielded wire bundle 21 respectively, and fixing the fixing portion 28 to the housing A with screws, both the shielded wire bundle 22 and the unshielded wire bundle 21 are bundled, and the housing A is securely attached. Fixed to.

The clamp 23 is made of a conductive material such as copper or iron. However, as shown in FIG. 11, the clamp 23 is entirely made of ordinary resin and has a holding surface of the holding portion 27 of the shielded wire bundle 22. The metal foil 27a having good conductivity may be attached to the inner surface and the outer surface of the fixing portion 28.

Further, as shown in FIG. 12, the grip portion 2
Pressing pieces 24b, 27 that urge the holding surfaces of 4, 27 inward.
By providing b, it is possible to prevent rattling when the diameter of the bundled wires is small. The shielded wire bundle 22
Regarding the grip portion 27, it is necessary that the pressing piece 27b is also formed of a conductive material and is electrically connected to the grip surface.

Further, as shown in FIGS. 13 and 14, a connecting plate 26 for connecting the grip portion 24 of the non-shielded wire bundle 21 and the grip portion 27 of the shielded wire bundle 22 is provided with the widths of the grip portions 24 and 27, respectively. Of the grip portions 24 and 27, and one of the grip portions 24 and 27 on one side and the other of the grip portions 24 and 2
7 is provided on the other end side, and both grip portions 24 and 27 are connected by the connecting plate 26 so that the bending directions thereof are opposite to each other, the grip portion 2 of the unshielded electric wire bundle 21.
Push 4 while twisting left and right around the hinge 25,
When the half-divided cylindrical bodies to be the gripping portions 27 of the shielded wire bundle 22 are butted against each other, the gripping state shown in FIG. 14 is obtained.

Therefore, this clamp must be formed of a flexible conductive resin or the like. When it is formed of a normal resin, the shielded wire bundle 2 is formed as described above.
It is necessary to bond a metal foil or the like from the grip surface of the second grip portion 27 to the inner and outer surfaces of the fixed portion 28.

[0042]

As described above, in the wire harness of the present invention, a shielded electric wire formed by covering an insulating covered electric wire with a metal foil is bundled, and the shielded electric wire is covered with an insulating material and a non-existing portion of the insulating material is provided. , The non-existing portion of the insulating material is clamped by a clamp having a conductive grip surface, and this clamp is electrically connected to a predetermined ground circuit, so that the step of covering the braided tube is not necessary. Since it is not necessary to separately ground each shielded wire, and it is not necessary to carry out the terminal treatment of the shielded wire in order to ground it as in the past, so efficient production can be achieved with a small number of processes, and automation is possible. It will be easier to deal with.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment according to the present invention.

FIG. 2 is a sectional view of the same.

3 is a cross-sectional view taken along line XX of FIG.

FIG. 4 is a sectional view showing a modified example of the above clamp.

FIG. 5 is a cross-sectional view showing a terminal connecting portion of the above.

FIG. 6 is a perspective view showing another embodiment.

FIG. 7 is a perspective view showing a modification example of the above.

FIG. 8 is a view showing the details of the above-mentioned fixing banding band.

FIG. 9 is a perspective view showing still another embodiment.

FIG. 10 is a cross-sectional view showing the above clamp.

FIG. 11 is a cross-sectional view showing a modified example of the above clamp.

FIG. 12 is a cross-sectional view showing another modified example of the above clamp.

FIG. 13 is a sectional view showing still another modified example of the above clamp.

FIG. 14 is a perspective view showing the same clamp.

FIG. 15 is a plan view showing a conventional example.

FIG. 16 is a perspective view showing another conventional example.

FIG. 17 is a sectional view of the above.

18 is a cross-sectional view taken along the line YY of FIG.

[Explanation of symbols]

 1 core wire 2 insulation coating part 3 insulation coating electric wire 4 shield material 5 shield wire 6,13 insulating material 7,14,23 clamp 7a gripping part 7b fixing part 7c metal foil 8 screw 9 terminal 9a core wire crimping part 9b coating gripping part 11 non Shielded wire bundle 12 Shielded wire bundle 15 Binding band 16 Fixing binding band 24, 27 Gripping portion 25 Hinge 26 Connecting plate 28 Fixing portion

Claims (3)

[Claims] 1. A wire harness comprising a shielded electric wire bundle composed of a plurality of shielded electric wires obtained by covering an insulated covered electric wire with a metal foil having good conductivity, the shielded electric wire bundle being covered with an insulating material. A part of the shielded electric wire bundle covered with a material is provided with an insulating material absent portion, and the insulating material absent portion is gripped by a clamp having a conductive grip surface,
A wire harness in which the grip surface of this clamp is electrically connected to a predetermined ground circuit. 2. A shielded electric wire bundle composed of a plurality of shielded electric wires obtained by coating an insulating covered electric wire with a metal foil having good conductivity, and a non-shielded electric wire bundle composed of a plurality of insulating covered electric wires, wherein the shield is provided. A wire harness in which a bundle of electric wires is covered with an insulating material, wherein a part of the shielded electric wire bundle covered with the insulating material is provided with a non-existing portion of the insulating material, and the non-existing portion of the insulating material is electrically conductive by a gripping surface. A wire harness that is gripped by a clamp having electrical properties, and the gripping surface of the clamp is electrically connected to a predetermined ground circuit. 3. The wire harness according to claim 2, wherein the clamp is provided with a gripping portion for holding the unshielded wire bundle so that the unshielded wire bundle is gripped together with the shielded wire bundle.