JP2000175341A - Attaching device of shielding wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable effectively attaching work of a shielding wire. SOLUTION: A coming-off preventing member 30 and a stopper member 20 are engaged with the outide of a shielding wire 10. When the shielding wire 10 is inserted in an attaching hole 16, an elastic coming-off preventing segment 32 passes the attaching hole 16 while generating diameter shrinkage deformation. When the shielding wire 10 reaches a specified insertion position, a flange type seal part 28 (seal part) abuts against this side hole edge of the attaching hole 16, the segments 32 is elastically returned to an expanding direction and abuts against the depth side hole edge of the attaching hole 16, and the shielding wire 10 is fixed so as not to be able to come off. Electric continuity between a shielding layer 13 and a shielding case 15 (attaching member) is ensured by interposing the coming-off preventing member 30. Attaching of the shielding wire 10 is enabled by simple operation inserting the shielding wire 10 in the attaching hole 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shielded wire mounting device.

[0002]

2. Description of the Related Art When a power supply or signal wire is connected to an electric device such as a terminal fitting mounted on an electric vehicle, a shield wire for noise prevention is used as the wire. An example of a means for attaching the terminal of the shielded electric wire to an electric device is disclosed in Japanese Patent Application Laid-Open No. H10-112924. Describing the structure, the shielded electric wire is formed by sequentially and concentrically laminating an insulating core, a shielding layer and an insulating sheath on the outer periphery of a conductor, and the electric equipment is housed in a conductive mounting member. A mounting hole for mounting a shielded electric wire is opened in the mounting member. A cylindrical member is fixed to the outer periphery of the shielded wire, and a mounting portion is formed on the outer periphery of the cylindrical member, and a bolt is penetrated through the mounting portion and screwed to the mounting member to form a cylindrical member. The shielded wire is fixed to the mounting member. Further, a connection ring is fitted on the outer periphery of the shield layer, and the connection ring makes good contact with the inner peripheral surface of the mounting hole, so that the shield layer and the mounting member can be in a conductive state. Furthermore, the end of the conductor protruding into the mounting member is connected to the device of the case via an electric wire or the like.

[0003]

When a shielded electric wire is connected to a vehicle-mounted electric device as described above, first, a shielded electric wire is manufactured and terminated at a wire harness factory. Is transported to an automobile assembly plant, where the ends of the shielded wires are attached to electrical equipment. In this automobile assembly plant, various assembling processes other than the assembly of shielded wires are performed by line work on the line,
Taking time and effort in assembling the shielded wires causes delays in other processes and, as a result, lowers the efficiency of the entire operation.

However, in the above-mentioned conventional mounting device, as a means for mounting the shielded electric wire to the mounting member, a time-consuming and time-consuming method of screwing in a bolt is employed. For this reason, there is a problem that the working efficiency is not good, and under such circumstances, it is desired to improve the workability of assembling the shielded wires. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide means capable of efficiently performing a shielded wire attaching operation.

[0005]

According to a first aspect of the present invention, there is provided a shielded electric wire in which an insulating core, a conductive shielding layer and an insulating sheath are arranged concentrically around the outer periphery of a conductor. A shield wire mounting device for mounting in a form penetrating through a mounting hole of a mounting member having the mounting member, and for connecting the shield layer to the mounting member in a conductive manner, wherein the device is fixed to the shield wire, and In the state where the shield wire is connected to the shield layer, the stopper member restricts the further insertion operation of the shielded wire by abutting the edge of the mounting hole on the near side in the insertion direction in the state where the shield layer is inserted into the mounting hole. In the state in which the elastic member is elastically deformed in the radially reduced direction so as to pass through the mounting hole, it is expanded in the expanding direction when the mounting hole is passed. It was provided comprising constituting a conductive retaining member having an elastic retaining piece to be locked in the insertion direction rear side of the hole edge in the mounting hole with sexual restored.

According to a second aspect of the present invention, in the first aspect of the present invention, the elastic retaining piece expands with respect to an inner peripheral surface of the mounting hole in a state where the shielded wire is retained. The elastic contact portion elastically contacted by the elastic restoring force in the direction is formed. According to a third aspect of the present invention, in the first or second aspect of the invention, the stopper member elastically contacts the hole edge of the mounting hole so as to press the mounting member between the stopper member and the elastic retaining piece. The configuration was such that a seal portion was provided.

[0007]

Operation and Effect of the Invention [Invention of Claim 1] The installation of the shielded electric wire is only required to insert the shielded electric wire into the mounting hole. In the insertion process, when the elastic retaining piece passes through the mounting hole while reducing the diameter, and the shielded wire reaches a predetermined mounting position, the stopper member comes into contact with the hole edge on the near side in the inserting direction of the mounting hole and the elastic retaining piece. Resiliently returns in the expanding direction and is locked to the hole edge on the back side of the mounting hole, whereby the shielded electric wire is attached to the mounting hole so that it cannot be pulled out and inserted. The work of attaching the shielded electric wire to the mounting hole is only a simple operation of inserting the shielded electric wire into the mounting hole, and does not require labor, time, tools or the like, so that the workability is excellent. In addition, conduction between the shield layer and the mounting member is ensured by the contact of the retaining member with the shield layer and the contact of the elastic retaining piece with the edge of the mounting hole. [Invention of claim 2] Since the elastic contact portion elastically abuts on the inner peripheral surface of the mounting hole due to the elastic restoring force of the elastic retaining piece in the expanding direction, the contact reliability between the retaining member and the mounting member is improved. Excellent. In addition, since the elastic contact portion abuts on the inner periphery of the mounting hole, unnecessarily expanding deformation of the elastic retaining piece is restricted, so that the shielded electric wire can be reliably removed.

When the shielded electric wire is attached to the mounting hole, the sealing portion elastically contacts the hole edge of the mounting hole to seal the space between the mounting hole and the stopper member. Infiltration into the interior is prevented. In addition, the floating movement in the insertion / removal direction of the shielded electric wire can be reliably restricted by the elastic restoring force of the seal portion.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A first embodiment of the present invention will be described below with reference to FIGS.

First, the shielded electric wire 10 will be described. The shielded electric wire 10 is composed of a conductor 11 formed by twisting conductive metal thin wires together and a core 12 made of an insulating resin material provided concentrically around the conductor 11.
And a shield layer 13 which is provided so as to surround the core 12 in a cylindrical shape along the outer peripheral surface thereof and which is formed by braiding a plurality of conductive metal wires in a net shape, and surrounds the shield layer 13 concentrically. And a sheath 14 made of an insulating material.

On the other hand, a shield case 15 (an attachment member which is a constituent element of the present invention) to which the shielded electric wire 10 is attached is for accommodating electric equipment (not shown) such as a motor mounted on an electric vehicle. is there. The shield case 15 has a predetermined thickness, and a circular mounting hole 16 for mounting the shield wire 10 in a penetrating state is formed at a predetermined position. When attaching the shielded electric wire 10 to the mounting hole 16, the stopper member 20, the retaining member 30 and the support cylinder 37 are attached to the shielded electric wire 10.

The stopper member 20 is formed by assembling a support member 21 made of synthetic resin and a grommet 25 made of rubber.
The support member 21 is formed at a connection cylindrical portion 22 having an inner diameter slightly larger than the outer diameter of the shielded electric wire 10 and at an upper end thereof (an end at a rear end in the insertion direction of the shielded electric wire 10 into the mounting hole 16). A locking projection 24 is formed on the inner periphery of the connecting cylinder 22 to be locked with a retaining member 30 described later. The grommet 25 has a cylindrical shape as a whole, and an upper end portion is an upper cylindrical seal portion 26 elastically adhered to the shielded wire 10, and a lower end portion is elastically adhered to the inner periphery of the mounting hole 16. At the upper end of the lower cylindrical seal portion 27, a flange-like seal portion 28 (a seal portion, which is a constituent feature of the present invention) is formed. The outer peripheral edge of the upper cylindrical seal portion 26
Is formed at the lower end of the tapered portion. The stopper member 20 is integrated with the support member 21 such that the lower cylindrical seal portion 27 and the flange-shaped seal portion 28 are brought into close contact with the upper half portion of the outer peripheral surface of the connecting cylindrical portion 22 and the lower surface of the flange portion 23. . The stopper member 20 is mounted with the upper cylindrical seal portion 26 elastically closely attached to the outer periphery of the sheath 14 of the shielded wire 10. The mounted stopper member 20 is slidable along the outer periphery of the shielded electric wire 10.

The retaining member 30 is made of a conductive metal material, and is formed by integrally molding an elastic retaining piece 32 with the main body tubular portion 31. The main body cylindrical portion 31 has a cylindrical shape slightly larger in diameter than the outer diameter of the sheath 14, and the locking protrusion 2 of the stopper member 20 is formed.
4 is formed with a locking hole 33 to be engaged. The elastic retaining piece 32 extends obliquely upward and obliquely outward from the lower end edge of the main body tubular portion 31 and has a radial shape like an umbrella bone as a whole. The radial distance from the outer tip of the elastic retaining piece 32 to the axis of the retaining member 30 is set to be larger than the radius of the inner peripheral surface of the mounting hole 16. A receiving portion 34 projecting radially inward is formed at the tip of each elastic retaining piece 32, and an elastic contact portion 35 projecting upward is formed at the inner tip of the receiving portion 34. I have. In the free state, the radial distance from the axis of the retaining member 30 to the outer surface of the elastic contact portion 35 is set to be slightly larger than the radius of the inner peripheral surface of the mounting hole 16. still,
Each elastic contact portion 35 is formed with a small embossed portion 36 protruding outward, and this embossed portion 36 comes into contact with the inner peripheral surface of the mounting hole 16.

The support cylinder 37 has a cylindrical shape, the inner diameter of which is close to the outer peripheral surface of the sheath 14 of the shielded wire 10, and the outer diameter of which is slightly smaller than the inner diameter of the main body cylinder 31 of the retaining member 30. Is set to Next, a method of attaching the shielded electric wire 10 will be described. Before mounting, the conductor 1 must be placed at the end of the shielded wire 10 in advance.
1, the core 12, and the shield layer 13 are each exposed in order by a predetermined length. Then, the stopper member 20 is externally fitted to the shielded electric wire 10, but the mounting position at this time is shifted rearward (upward in the figure) from the final fitted position in the insertion direction of the shielded electric wire 10 into the mounting hole 16. Position (see FIG. 1).

Next, the support cylinder 37 is fitted over the end of the sheath 14, and the shield layer 13 is turned up so as to cover the outer periphery of the support cylinder 37 (see FIG. 2). Thereafter, the retaining member 30 is fitted into the shielded electric wire 10 from below, and the main body cylindrical portion 31 is inserted.
Is positioned so as to cover the folded portion of the shield layer 13. Then, the body tube portion 31, the folded portion of the shield layer 13, the support tube 37, the sheath 14, and the portion of the shield layer 13 hidden in the sheath 14 are caulked 38 from the outside, and the body tube portion 31 is formed. Is crimped 39 on the sheath 14 at its upper end (see FIG. 3). As a result, the retaining member 30 is fixed to the shielded electric wire 10 in a state where play in the axial direction (the direction of insertion and removal with respect to the mounting hole 16) is restricted.

Further, the stopper member 20 previously fitted to the shielded electric wire 10 is slid to the retaining member 30 side, and the connecting tubular portion 22 is fitted so as to overlap the outer periphery of the main body tubular portion 31 of the retaining member 30. Then, the locking projection 24 of the stopper member 20 is engaged with the locking hole 33 of the retaining member 30. As a result, the stopper member 20 is also fixed to the shielded electric wire 10 in a state where the movement is restricted in the axial direction. When the shield wire 10 to which the stopper member 20 and the retaining member 30 are fixed is inserted into the mounting hole 16, the elastic retaining piece 32 enters the mounting hole 16 while being elastically reduced in diameter, and further enters the lower cylindrical seal portion 27. Are fitted into the mounting holes 16 while being elastically adhered thereto. Then, when the shielded electric wire 10 reaches a predetermined mounting position, the elastic retaining piece 32 passes through the mounting hole 16 and resiliently returns in the radially expanding direction, and the tip of the elastic retaining piece 32 and the receiving portion 34 By contacting the edge of the hole on the inner side in the insertion direction (the inside of the shield case 15), the movement of the shielded electric wire 10 in the removal direction is restricted. At the same time, the flange-shaped sealing portion 28 elastically abuts on the hole edge on the near side (outside of the shield case 15) in the insertion direction of the mounting hole 16 so that
Further insertion of the shielded electric wire 10 is restricted. As a result, the shielded electric wire 10 is attached and pulled out in a state where it penetrates through the attachment hole 16 and attached in a state where play in both directions is regulated. Thereafter, in the shield case 15, the terminal fitting 40 is crimped to the end of the conductor 11 of the shielded electric wire 10, and the terminal fitting 40 is connected to an electric device (not shown) in the shield case 15.

In this mounting state, the elastic contact portion 35 is attached to the mounting hole 1 by the elastic restoring force of the elastic retaining piece 32 in the expanding direction.
6, the shield layer 13 of the shielded wire 10 is conductively connected to the shield case 15 through the main body cylindrical portion 31 of the retaining member 30 and the elastic retaining piece 32. Become. Thereby, the shielded electric wire 1
0, a shield area surrounded by a shield layer 13;
The space between the shield region inside the shield case 15 is continuous, and a highly reliable shield function is exhibited in the entire region of the conduction path from the shielded electric wire 10 to the electric device inside the shield case 15.

As described above, in the present embodiment, the operation of attaching the shielded electric wire 10 to the attachment hole 16 is performed as follows.
It requires only a simple operation of simply inserting and requires no labor, time, tools or the like, and is excellent in workability. Further, since the lower cylindrical seal portion 27 and the flange-like seal portion 28 are elastically adhered to the inner peripheral surface and the outer edge of the mounting hole 16, the gap between the mounting hole 16 and the stopper member 20 can be reduced. Infiltration into the shield case 15 is prevented.
Further, the infiltration of the shielded electric wire 10 from the gap with the stopper member 20 is prevented by the upper cylindrical seal portion 26.

The elastic deformation of the elastic retaining piece 32 is restricted by the contact of the elastic contact portion 35 with the inner periphery of the mounting hole 16. The floating movement of the member 30 in the pull-out direction is reliably prevented. On the other hand, the stopper member 20 is reliably prevented from moving in the axial direction with respect to the retaining member 30 by the engagement between the locking projection 24 and the locking hole 33. Therefore, the flange portion 23 on the stopper member 20 side and the receiving portion 3 on the retaining member 30 side
4 (a gap between the flange portion 23 and the outer surface of the shield case 15) is kept at a certain size without expanding, and the flange portion 23 and the shield case 15 have a flange-like shape. The sealing portion 28 is sandwiched in a state of being elastically crushed and deformed, and exhibits a high sealing function.

Further, the elastic retaining piece 32 is urged in the expanding direction by the elastic restoring force of the flange-shaped seal portion 28,
Since the biasing force acts as a contact pressure between the embossed portion 36 of the elastic contact portion 35 and the inner peripheral surface of the mounting hole 16, the contact reliability is excellent. Similarly, the flange-shaped seal portion 28
Due to the elastic restoring force, the floating movement of the shielded electric wire 10 in the insertion / removal direction is surely restricted. [Other Embodiments] The present invention is not limited to the embodiment described above with reference to the drawings. For example, the following embodiments are also included in the technical scope of the present invention. Various changes can be made without departing from the scope of the invention.

(1) In the above embodiment, the elastic stoppers are formed with the elastic contact portions elastically contacting the inner and male surfaces of the mounting hole.
According to the present invention, a configuration in which the elastic contact portion is not provided can be adopted. (2) In the above-described embodiment, the stopper member is provided with the seal portion so that the inside of the mounting member is waterproofed. However, according to the present invention, the stopper member may not be provided with the seal portion. In this case, the sealing means may be provided not on the stopper member but on the retaining member.

(3) In the above embodiment, the case where the shield layer is a braid in which a plurality of fine wires are braided in a net shape has been described. However, the present invention is not limited to the braid, for example, a conductive metal foil or a spirally wound conductive braid. The present invention can also be applied to a case where the shield layer is formed by using a metal wire, or by applying a metal coating by vapor deposition, plating, or plasma spraying.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state where a stopper member is externally fitted to a shielded wire in a first embodiment.

FIG. 2 is a cross-sectional view showing a state in which a support cylinder is externally fitted to a shielded electric wire and a shield layer is folded around the outer periphery thereof.

FIG. 3 is a cross-sectional view showing a state in which a retaining member is externally fitted to the folded shield layer and fixed to the shielded electric wire by crimping.

FIG. 4 is a cross-sectional view showing a state in which a stopper member is locked to a retaining member, and a shielded electric wire is attached to a mounting hole.

FIG. 5 is a partially enlarged view showing a state where a shielded electric wire is attached to an attachment hole.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Shield electric wire 11 ... Conductor 12 ... Core 13 ... Shield layer 14 ... Sheath 15 ... Shield case (attachment member) 16 ... Attachment hole 20 ... Stopper member 28 ... Flange-shaped seal part (seal part) 30 ... Detachment prevention member 32 ... Elastic retaining piece 35 ... elastic contact part

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shoichi Kanakawa 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi F-term in Harness Research Institute, Inc. (reference) 5G375 AA12 BA03 BA26 BB40 CA03 CA14 CA18 DA08 DA36 DB35 EA17 EA20

Claims (3)

[Claims] 1. A form in which an insulated core, a conductive shield layer and an insulative sheath are sequentially and concentrically arranged on the outer periphery of a conductor in a concentric manner, and the shielded electric wire is penetrated through a mounting hole of a conductive mounting member. And a shielded wire mounting device for connecting the shield layer to the mounting member in a conductive manner, wherein the device is fixed to the shielded wire and the shielded wire is inserted into the mounting hole when the shielded wire is inserted into the mounting hole. A stopper member for restricting the further insertion operation of the shielded wire by abutting the hole edge on the near side in the insertion direction in the above, to be fixed to the shielded wire in a state of being connected to the shield layer and to pass through the mounting hole. While being able to elastically bend in the diameter reducing direction, when it has passed through the mounting hole, it elastically returns in the expanding direction and has a difference in the mounting hole. Mounting device of the shielded wire, characterized by comprising a conductive retaining member having an elastic retaining piece to be locked in the write direction inner side of the hole edge. 2. The elastic stopper has an elastic contact with an inner peripheral surface of the mounting hole elastically in an expanding direction of the elastic stopper when the shielded wire is stopped. 2. The apparatus according to claim 1, wherein a contact portion is formed. 3. The seal member, wherein the stopper member is provided with a seal portion that elastically contacts the hole edge of the mounting hole so as to press the mounting member between the stopper member and the elastic retaining piece. Item 3. The mounting device for a shielded electric wire according to claim 1 or 2.