JPH0773948A - Ground method of shield wire and grounding connector used for shield wire - Google Patents

Abstract

PURPOSE:To improve the shielding performance by simplifying the ground circuit to earth a shield wire housed in a moulded protector for wire harness to the car body, so as to simplify the forming process of the ground circuit, and at the same time, eliminating the nonexistent part of the sheath layer for the ground circuit. CONSTITUTION:An insulating skin 4 of the sheath layer 3 at the middle part of a shield wire 1 is removed to expose the conductive layer 5 of the sheath layer 3. After that, by using a connector 6 for ground having a cut circular contact 7 and a connection 8, the contact 7 is connected to the exposed conductive layer 5A of a shield wire 1 in a moulded protector 10 for wire harness. Together with such a connecting, the connection 8 is projected from a connector insertion hole 12 to the outer side of the moulded protector 10, and it is superposed to the installing part 11 of the moulded protector 10 to the car body. And the connection 8 and the installing part 11 in the superposing posture are fixed to the car body 14 by using a common installing bolt 13, and the sheath layer 3 and the car body 14 are connected and continued through the connector 6 for ground and the installing bolt 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for electric wiring of electronic devices and automobiles, and wraps a core wire of a signal conductor in a sheath layer to prevent adverse effects of external electromagnetic waves on the core wire. It relates to the grounding method for shielded wires that prevent the leakage of electromagnetic waves from the core wire to the outside. Specifically, the wire harness wire group is stored and the wire harness is arranged in the body / device. The present invention relates to a grounding method for a seed wire housed in a wire harness molded protector to be held and a grounding connector used for the grounding method.

[0002]

2. Description of the Related Art A shielded wire 1 has a structure in which a core wire 2 of a signal wire is wrapped by a sheath layer 3 having a conductive layer 5 made of a conductive metal net such as an aluminum wire inside an insulating outer cover 4 as shown in FIG. And a ground circuit described below is formed at the end of the shielded electric wire 1. That is, by peeling off a part of the insulating outer cover 4 at the end of the shielded electric wire 1,
The exposed conductive layer 5 is twisted and collected to form a single wire drain wire 2
Processed to 0 and crimping the connector 22 to the drain wire 20 to provide the ground wire 21 and the connector 2 on the vehicle body / device side provided in advance.
2 is connected to form an earth circuit, or a shield wire 1 is provided with a drain wire (not shown) made of a conductive mesh parallel to the core wire 2 in the end of the shield wire 1. A part of the sheath layer 3 is peeled off, and the exposed drain wire is made into a single wire shape in the same manner as described above, and the connector 2
2 is crimped and similarly connected to a ground wire provided in advance to form a ground circuit. Then, the drain wire 20 in a single wire state formed at the end of the shielded electric wire 1 is subjected to an insulation treatment such as fitting of a heat shrinkable tube or tape winding.

[0003]

The above-mentioned conventional method of forming an earth circuit is performed by peeling off the end portion of the shielded electric wire 1.
The process of twisting and gathering the conductive layer 5 to form the drain wire 20 in a single wire state, and the insulation treatment of fitting a heat-shrinkable tube to the drain wire 20 make the work extremely complicated, resulting in poor workability and inefficient work. In addition, there is a drawback that goes against the high productivity of electric wire mass production in recent years.

Further, in the case where the former conductive layer 5 is twisted and collected to be processed into the drain wire 20 in a single wire state,
It is necessary to peel off the sheath layer 3 of a considerable length (normal 70
In the latter one, the crimping of the connector 22 to the twisted drain wire also requires a drain wire length necessary for fixing and holding the drain wire lacking rigidity. Therefore, the end separation of the shielded electric wire 1 has to be made considerably long. Therefore, the sheath layer 3 does not exist in these long peeled portions, and there is a quality problem in that the shield performance is lost. The present invention provides a method for grounding a shielded electric wire and a grounding connector used for the method, which solves the above-mentioned problems of the prior art.

[0005]

The method of grounding a shielded electric wire according to the present invention for solving the above technical problems is described as follows: "A shielded electric wire housed in a groove wire molded protector for a wire harness is
When grounding to the vehicle body / device, the insulating outer skin of the sheath layer in the middle portion of the shielded wire is peeled off to expose the conductive layer of the sheath layer, and then the contact portion to the exposed conductive layer and the vehicle body / device Using a grounding connector having a connecting portion to, while connecting the contact portion to the exposed conductive layer of the shielded electric wire in the wire harness molded protector, the connection portion of the wire harness molded protector. Overlaid on the mounting portion of the molded protector for the wire harness to the vehicle body / apparatus to the outside, and the connecting portion and the mounting portion in the overlapping posture, using a common mounting bolt,
The grounding method is a grounding circuit which is fixed to the vehicle body / apparatus to connect and conduct the sheath layer and the vehicle body / apparatus via the earthing connector ".

The earthing connector is formed by bending a single strip-shaped plate material into a snap ring shape having a contact portion of a notched ring and a connecting portion protruding at both ends of the contact portion.
The contact part is wound around the exposed conductor part, the connecting parts at both ends are overlapped, and the wire protector for the wire harness existing at the protruding part is projected outward from the connector insertion hole of the side wall of the wire protector for the wire harness. The one that is superposed and tightened on the attachment part of is mainly used.

[0007]

The above-described grounding method of the shielded wire of the present invention is
Between the exposed conductive layer of the shield layer in the middle part of the shielded wire housed in the wire harness molded protector and the mounting part of the wire harness molded protector to the vehicle body / device,
Since the above-mentioned grounding connector is used and the connecting part of the grounding connector is connected and conducted to the vehicle body etc. through the mounting bolt of the mounting part, it is effective between the sheath layer of the shielded wire and the vehicle body / device. A ground circuit can be formed.

Then, the complicated work of forming the ground circuit by peeling the end portion of the shielded wire in the conventional method for a long time is made unnecessary, and the sheath layer at the end portion is effectively preserved. The shield performance is improved. Furthermore, a small amount corresponding to the width of the grounding connector is sufficient for peeling off the insulating jacket for mounting the above-mentioned grounding connector, and the grounding connector is brought into contact with the peeled portion, and the protruding connection portion Since the simple work of bolting and connecting to the vehicle body / device is sufficient, the ground circuit forming process of the shielded wire can be particularly simplified as compared with the above-mentioned conventional method. Then, the conventional ground wire becomes unnecessary and the ground circuit is simplified.

[0009]

Embodiments will be described in detail below based on embodiments. That is, referring to FIG. 1 showing a grounding method according to the first embodiment of the present invention and a grounding connector 6 used for the grounding method, first, referring to FIG. It has an elastic snap ring shape composed of a contact portion 7 formed by bending a notch into a notched ring body, and a pair of connecting portions 8 formed by projecting both ends of the contact portion 7 outward from the ring body. , The connecting portion 8 is opened, the insulating outer cover 4 in the middle portion of the shielded electric wire 1 is peeled off, and the exposed outer conductive portion 5A having a cylindrical shape is fitted to the pair of connecting portions 8.
When they are overlapped with each other, the contact portion 7 has a shape in which the contact portion 7 comes into elastic contact with the exposed conductive layer 5A so as to be electrically conductive. Then, the grounding connector 6 is used to form a grounding circuit by the following procedure / method.

That is, referring to FIG. 1A, the sheath layer 3 at a predetermined intermediate position of the shielded electric wire 1 housed in the groove of the U-shaped grooved wire harness molded protector 10 (hereinafter simply referred to as the molded protector 10). The insulating outer cover 4 is peeled off to expose the entire conductive layer 5 below the insulating outer cover 4 to provide a cylindrical exposed conductive layer 5A. Then, the exposed conductive layer 5A
The earthing connector 6 is attached to the housing and is housed in the molding protector 10. The protruding connecting portion 8 is passed through the connector insertion hole 12 penetrating the side wall of the molding protector 10 and is exposed to the outside of the molding protector 10. , The molded protector 10 existing at the protruding portion is set on the mounting portion 11 to the vehicle body, and the common mounting bolt 13 is attached to the connecting portion 8 and the bolt hole 9 of the mounting portion 11 in the overlapping position. It is fastened by tightening and fixed to the vehicle body 14 to connect the grounding connector 6 through the mounting bolt 13 to connect the exposed conductive layer 5A and the vehicle body 14 to form a grounding circuit of the shielded wire 1.

Next, a grounding connector 6 according to another embodiment of the present invention will be described with reference to FIG. That is, (A) of FIG.
Has a shape in which a single strip-shaped plate is bent to form a curl-shaped contact portion 7 on the head and a flat-plate-shaped connecting portion 8 is formed on the latter half portion. The mounting parts 11 of 10 are superposed and mounted, and are connected and fixed to the vehicle body 14 by common mounting bolts 13. In addition, FIG. 2B
Has a shape in which a single strip-shaped plate member is bent into a substantially L-shape, and one piece serves as a contact portion 7 and the other piece serves as a connection portion 8, and this contact portion 7 is exposed in the molding protector 10. The layer 5A is pressed into contact with the side of the layer 5A, and the connecting portion 8 is connected to the molding protector
The bottom plate 16 is exposed to the outside and overlaps with the mounting portion 11. In FIG. 2C, the contact portion 7 formed of a pair of opposed standing pieces and the flat plate connecting portion 8 are made of a single plate material, and the connecting portion 8 is also the mounting portion 1.
It is polymerized with 1 and is connected and fixed to the vehicle body 14.

The above-mentioned respective embodiments have the above-mentioned effects, and the earthing connector 6 is mounted between the exposed conductive layer 5A in the middle of the shielded wire 1 and the mounting portion 11 of the molded protector 10, and the mounting thereof is carried out. Since the ground circuit can be formed only by bolting the portion 11, the process of forming the ground circuit is extremely simplified, the conventional long ground wire is not required, and the complicated processing of the shield wire end and the absence of the sheath layer. The part is eliminated.

[0013]

As described above, the method for grounding a shielded electric wire of the present invention and the grounding connector used for the method are as follows.
The long sheath layer absent part at the end of the shielded wire is eliminated to improve the shield performance, and the grounding circuit is simplified to make the processing extremely simple and efficient, which promotes the cost reduction of the shielded wire and the wire harness. There are various effects that satisfy the requirements for mass production and high productivity.

[Brief description of drawings]

FIG. 1 shows a method for grounding a shielded electric wire according to a first embodiment of the present invention and a grounding connector used therefor, which is shown in FIG.
Is a perspective view showing the procedure and method of the grounding method, (B) in the figure is a perspective view of the grounding connector, and (C) in the figure.
Is a cross-sectional view of the molded protector for the wire harness showing the state of the ground circuit.

FIG. 2 shows a ground connector according to another embodiment of the present invention,
Illustration of (A) (B) (C) in the figure and its shape and usage

FIG. 3 is a perspective view showing a conventional method for forming a ground circuit of a shielded electric wire.

[Explanation of symbols]

 1 Shielded Wire 2 Core Wire 3 Sheath Layer 4 Insulating Shell 5 Conductive Layer 5A Exposed Conductive Layer 6 Grounding Connector 7 Contact Part 8 Connection Part 9 Bolt Hole 10 Wire Harness Molding Protector 11 Mounting Part 12 Connector Insertion Hole 13 Mounting Bolt 14 car body

Claims (2)

[Claims] 1. When the shielded wire housed in the grooved wire harness molded protector is grounded to a vehicle body / device, the insulating outer skin of the sheath layer in the middle portion of the shielded wire is peeled off to make the sheath layer conductive. Exposing the layer, and then using a grounding connector having a contact part to the exposed conductive layer and a connection part to the vehicle body / device, to the exposed conductive layer of the shielded wire in the molded protector for the wire harness. While connecting the contact portion, the connection portion is exposed to the outside of the wire harness molding protector to be superposed on a mounting portion of the wire harness molding protector to a vehicle body / apparatus, and the connection portion in a stacked posture and the By fixing the mounting part to the vehicle body / device by using a common mounting bolt, the sheath layer and the vehicle body / device are connected and guided via the grounding connector. A grounding method for shielded wires, which is characterized by making a grounding circuit. 2. A single band-shaped plate member is bent to form a contact portion of a notched ring and a pair of plate-shaped connecting portions at both ends of the contact portion,
2. A structure in which a bolt hole is formed in the connecting portion in a posture in which the pair of connecting portions are overlapped with each other.
A grounding connector used for the grounding method for shielded electric wires.