JP2001257037A - Connector for connecting shield layer of shielded wire with grfounding wire and grounding connection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability of connection of grounding wire with shielded wire. SOLUTION: A connector 10 consists of a top case 14 provided with a bus-bar 16 integrating a pressure welding blade 16b for connecting to a shield layer 11a cutting off a sheath 11b of a shielded wire 11 with a shield layer 11a and a terminal part 16c to be coupled with a terminal fitting 12a of a grounding wire 12 terminal, and a bottom case 15 provided with a guide groove 15a for inserting through and holding a shielded wire 11. By covering with the top case 14 after the bottom case holds the shielded wire 11, the above pressure welding blade 16b gets access to the shield layer 11a cutting off the sheath 11b, and at same time, the above terminal part 16c is arranged inside a guide passage 15d, into which is guided for connection the terminal fitting 12a of the grounding wire 12 terminal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector for connecting a shield layer of a shielded electric wire to an earth wire and an earth connection structure, and more particularly to an improvement in workability of connecting an earth wire to a shielded electric wire. .

[0002]

2. Description of the Related Art FIG. 10 shows a terminal processing operation for grounding a shielded electric wire. First, a cut 1b is made in the sheath 1a of the shielded electric wire 1 (FIG. 10).
(A), the sheath 1a is peeled off to expose the conductor wire 1d wound to form a shield layer between the central electric wire 1c and the sheath 1a (FIG. 10 (B)), and then the conductor wire 1d is twisted. In addition, it is separated from the central electric wire 1c (see FIG. 1).
0 (C). Subsequently, the terminal fitting 2 is crimped to the tip of the twisted conductor wire 1d (FIG. 10 (D)), and the tube 3 is sheathed on the exposed portion of the conductor wire 1d (FIG. 10).
(E)), a tape T is wound between the base of the tube 3 and the outer periphery of the sheath 1a to fix the tube 3 (FIG. 10 (F)).

[0003]

In the conventional method of processing a shielded electric wire as described above, the processing operation requires many steps, so that the workability is deteriorated. There is a possibility that the conductor wire 1d may be cut. Also, the conductor wire 1 of the shield layer
Since the terminal of d is easily disassembled, the conductor wire 1d may protrude when the terminal fitting 2 is crimped and come into contact with another circuit.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a connection connector capable of connecting to a ground wire without exposing a shield layer of a shielded wire, and a ground connection using the connection connector. The task is to provide a structure.

[0005]

In order to achieve the above object, the present invention provides a press-connecting blade for cutting a sheath of a shielded electric wire and connecting to a shield layer, and a terminal fitted and connected to a terminal fitting of a ground wire terminal. The upper case is provided with a bus bar integrally provided with a part, and the lower case is provided with a guide groove for inserting and holding the shielded wire, and by holding the shielded wire on the lower case and covering the upper case, There is provided a connector for connecting a shield layer of a shielded electric wire to an earth wire, wherein the sheath is cut by a press-contact blade so that the sheath can be brought into contact with the shield layer.

[0006] According to the above configuration, the upper case is put on the lower case while the shielded electric wire is held on the lower case, so that the press contact blade can bring the sheath into contact with the shield layer. Since the shield layer is connected to the terminal via the bus bar, the ground wire and the shield layer can be connected via the bus bar by fitting and connecting the terminal fitting of the ground wire terminal to the terminal. .

[0007] Two or more terminal portions of the bus bar may be provided at positions parallel to the length direction of the electric wires so that they can be connected to at least two electric wires. More specifically, the ground wire terminal fitting introduction path is opened toward both sides of the case, and the bus bar terminals are arranged facing both sides, so that the ground wire terminal fitting can be connected from both sides. It can also be. In this way, a plurality of ground wires can be connected to the shield layer of one shielded electric wire.

In another aspect of the present invention, the connection connector is attached to a terminal or an intermediate position of a shielded wire to connect a press-contact blade of the bus bar to the shield layer, and a terminal fitting attached to a terminal of the ground wire is connected to the bus bar. And a connection structure between the shield layer of the shielded wire and the ground wire, wherein the ground wire is connected to the shield layer via the bus bar.

With the above arrangement, the connection connector is attached to an arbitrary position of the shielded electric wire, and the terminal connector of the ground wire is inserted into the connection connector and fitted and connected to the terminal portion of the bus bar. The shield layer of the shielded electric wire can be connected to the ground wire via the bus bar.

[0010] Further, a plurality of the above connectors for connection are prepared,
Attach another terminal fitting to the other end of the ground wire fitted and connected to the terminal part of the bus bar of one of the connectors,
The other terminal fittings may be fitted and connected to the terminal portions of the bus bar of the other end connection connector so that the shield layers of the shielded wires of the plurality of connection connectors are connected in a chain with ground wires. it can. With this configuration, the grounding between the shielded wires can be collectively performed at an arbitrary place, and the processing operation can be performed only by a simple operation.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a connector 10 for connecting a shield layer 11 a of a shielded electric wire 11 and a ground wire 12.
The connection connector 10 includes a case 13 made of synthetic resin and a bus bar 16 provided in the case 13.

As shown in FIGS. 2A to 2C, the case 13 comprises an upper case 14 and a lower case 15 which are openably and closably connected via a hinge 13a, and comprises a locking claw and a locking frame. It can be fixed in the closed state by the lock portion 13b. On the inner surface of the lower case 15, the shielded electric wire 1
1 and a guide groove 15a for inserting and holding
A groove 15c for holding the central electric wire 11c of the shielded electric wire 11 is recessed through a step 15b for regulating the insertion depth of the shielded electric wire. In the mating surface of the upper case 14 and the lower case 15, an introduction path 15d for receiving the terminal fitting 12a crimped to the terminal of the separately inserted ground wire 12 is recessed, and one of the introduction paths 15d is recessed. Terminal fitting 12a on the inner surface
A lance 15e for locking and holding the projection is provided.

As shown in FIG. 3, the bus bar 16 is formed by stamping and bending a metal plate. One end of the bus bar 16 extends inward from a semicircular holding portion 16a corresponding to the outer periphery of the shielded electric wire 11. A press-contact blade 16b that cuts and raises to penetrate the sheath 11b of the shielded electric wire 11 and connect to the shield layer 11a is provided. At the other end of the bus bar 16, a male tab-shaped terminal portion 16c fitted and connected to the terminal fitting 12a of the ground wire 12 is integrally projected in both directions so as to be parallel to the shielded wire 11 held by the holding portion 16a. Has been established.

On the inner surface of the upper case 14, the busbar 1
A recess 14a for fixing the bus bar 16 by fitting the holding portion 16a of FIG. 6 is formed. As shown in FIG. 2, the terminal portion 16c is inserted into the introduction path 15d with the holding portion 16a fitted in the recess 14a. It is arranged along the axial direction inside. FIG. 4 shows the configuration of the shielded electric wire 11 used in the connection process described below, and FIG. 5 shows the configuration of the ground wire 12.

In order to connect the shielded wire 11 and the ground wire 12 using the connector 10 having the above configuration, first, as shown in FIGS. 5A and 5B, the shielded wire 11 to be connected is processed. Then, a cut 11d is made in a required portion of the above, and the sheath 11b and the shield layer 11a are peeled off to expose the central electric wire 11c. Next, as shown in FIG. 5C, the shielded wire 11 is fitted and held in the guide groove 15a of the lower case 15, and the center wire 11c is inserted into the groove 15c.
And take them out.

Then, as shown in FIG. 5 (D), when the upper case 14 is put on the lower case 15 and pressed until the lock portion 13b is engaged, as shown in FIG. 6, the pressing blade 16b is attached to the sheath 11b. It cuts and cuts into contact with the shield layer 11a. Thereby, the shield layer 11a and the bus bar 1
6 is connected. Next, FIGS. 5E and 5F
As shown in FIG.
2a is introduced into the introduction path 15d. As shown in FIG. 7, the introduced terminal fitting 12 a is connected to the terminal 1 of the bus bar 16.
At the same time as fitting connection with 6c, it is locked and held in the introduction path 15d by the lance 15e. In this way, the shield layer 11a of the shielded electric wire 11 is connected to the ground wire 12 via the bus bar 16.

To connect the plurality of shielded wires 11A, 11B, 11C to the ground using the connection connector 10, as shown in FIG.
Connection connectors 10A, 10B, and 10C are attached to 1A, 11B, and 11C in the same manner as in the example of FIG. 5, and the bus bars 16A, 16B, and 16C are connected to the shield layer 11a. The bus bar 16A of the connection connector 10A
Is connected to one end of the ground wire 12A via the terminal fitting 12Aa, and the other terminal fitting 12Ab is connected to the terminal 16A of the adjacent connector 10B.
Connect to Bc. Further, the other end of the terminal portion 16Bc is connected to the terminal fitting 12Ba at one end of the other ground wire 12B, and the other terminal fitting 12Bb is connected to the terminal portion 16Cc of the adjacent connection connector 10C. In this way, each shielded electric wire 11A, 11B, 11C is in a state where the shield layer 11a is connected via the ground wires 12A, 12B. Further, the terminal fitting 12Ca at the other end of the ground wire 12C having the ground joint connector 17 attached to one end is connected to the terminal portion 16A of the connection connector 10A.
c, each shielded wire 11A, 1
The shield layers 11a of 1B and 11C are grounded in a chain.

In the above-described embodiment, the connection connector 10 is shown as an example in which a conductor wire is wound as the shield layer 11a of the shielded electric wire 11, but the invention is also applicable to a braided wire or a conductor foil. It is.
Generally, as shown in FIG. 11, in a shielded electric wire 21 using a conductor foil 21a, in order to ground the conductor foil 21a, a drain wire 21b is provided together with the conductor foil 21a, which is taken out and connected to the ground wire. There is a need to. However, when the connection connector 10 of the present invention is used, the bus bar 1 can be formed by making the press-contact blades 16b bite without the need for the drain wire 21b.
6, the conductor foil 21a and the ground wire 12 can be connected.

Further, in the above-described embodiment, the example in which the connection connector 10 is attached to the terminal where the center wire 11c is taken out from the end of the shielded wire 11 has been described. Can be attached to the position. FIG. 9 shows a connection connector 30 of a modified example in this case, in which a guide groove 35 a for fitting and holding the shielded wire 11 is formed over the entire length of the case 33. Further, in the above embodiment, the bus bar 16 is provided with one holding portion 16a having the pressure contact blade 16b and one terminal portion 16c.
In one case 13, the shield layers 11a of the shielded wires 11 and / or the ground wires 12 may be interconnected. Further, in the above embodiment, the connection between the terminal portion 16c and the ground wire 12 is performed by fitting the male and female terminals, but any connecting means such as bolting may be employed. The connection may be made inside or outside the case 13.

[0020]

As is clear from the above description, according to the present invention, when the shield layer of the shielded electric wire is connected to the ground wire, operations such as cutting the sheath and twisting the shield layer are performed. Since it is not necessary, the workability of a series of processing operations can be improved. Also, when grounding between a plurality of shielded wires, the shielded wires can be grounded in a chain just by attaching a connection connector to each shielded wire and connecting them with a ground wire.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a connector for connection of the present invention.

2A is a front view of a connection connector, FIG. 2B is a rear view, and FIG. 2C is a plan view with a case opened.

FIG. 3 is a perspective view of a bus bar.

4A is a diagram showing a shielded electric wire, and FIG. 4B is a diagram showing a ground wire.

FIGS. 5A to 5F are diagrams showing a connection process between a shielded electric wire and a ground wire.

FIG. 6A is a sectional view taken along line XX of FIG. 5F.

FIG. 7B is a sectional view taken along the line YY of FIG.

FIG. 8 is a diagram illustrating a connection state between a plurality of shielded wires and a ground wire.

FIG. 9 is a perspective view showing a modification of the connection connector.

FIGS. 10A to 10F are diagrams showing a conventional example.

FIG. 11 is a diagram showing a conventional example.

[Explanation of symbols]

10, 30, 10A, 10B, 10C Connector for connection 11 Shield wire 11a Shield layer 11b Sheath 11c Center wire 12, 12A, 12B, 12C Ground wire 12a, 12Aa, 12Ab, 12Ba, 12Bb, 1,
2Ca terminal fittings 13, 33 case 14 upper case 15 lower case 15a, 35a guide groove 16, 16A, 16B, 16C bus bar 16b pressure contact blade 16c, 16Ac, 16Bc, 16Cc terminal portion

Claims (4)

[Claims] An upper case having a bus bar integrally provided with a pressure contact blade for cutting a sheath of a shielded electric wire and connecting to a shield layer, and a terminal portion fitted and connected to a terminal fitting of a ground wire terminal. It consists of a lower case provided with a guide groove for inserting and holding the shielded wire, and by holding the shielded wire on the lower case and covering the upper case, it is possible to cut the sheath with the press-contact blade and make contact with the shield layer. A connector for connecting a shield layer of a shielded electric wire to a ground wire, characterized in that: 2. The shield layer of a shielded electric wire according to claim 1, wherein two or more terminal portions of the bus bar are provided at positions parallel to a length direction of the electric wire so as to be connectable to at least two electric wires. Connector for connection with wire. 3. A ground connection structure using the connection connector according to claim 1 or 2, wherein the connection connector is attached to a terminal or an intermediate position of a shielded electric wire and the press-connecting blade of the bus bar is connected to the shield. While being connected to the layer, the terminal fitting attached to the terminal of the ground wire is fitted and connected to the terminal portion of the bus bar, and the ground wire is connected to the shield layer via the bus bar. Connection structure between the shield layer of the shielded wire and the ground wire. 4. A plurality of said connection connectors are prepared, and another terminal fitting is also attached to the other end of the ground wire fitted and connected to the terminal part of said bus bar of one connection connector. 4. The shield according to claim 3, wherein the shield layers of the shielded wires of the plurality of connection connectors are connected in a chain with ground wires by fitting and connecting the terminal portions of the bus bar of the other end connection connector. Connection structure between the shield layer of the electric wire and the ground wire.