JP2003151652A - Earth connecting structure of electric wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispose terminals of plural electric wire terminals for earth circuit in one portion to perform earth connection of the terminals to a vehicle body, and not to leave the wires on the vehicle body by surely separating the terminals of the electric wires from the vehicle body when disassembling it. SOLUTION: A plurality of female terminal fitting part 22A, 22B are projected from a vehicle body fixing member 20 for earth made of a conductive metal plate having bolt insertion hole 21a, and elastic locking pieces 29 are projected from the peripheral walls. On the other hand, the terminals 10A, 10B are connected to the terminals of the plural electrical wires w1, w2. The terminals 10A, 10B are inserted and electrically connected into the terminal fitting parts 22A, 22B, with a state where the locking pieces 29 are inserted and locked into the locking holes 15 of the terminals, a vehicle body fixing member 20 for earth is fastened to the vehicle body P with a bolt B to perform earth processing of the plural electrical wires w1, w2. When the plural electric wires w1, w2 are pulled at a time of disassembling the vehicle body, the locking by the locking pieces 29 is released by the pulling force loaded on the terminals 10A, 10B and thereby the electric wires are detached from the vehicle body P.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire ground connection structure. More specifically, the terminals connected to electric wire terminals of a plurality of earth circuits are grounded together to the vehicle body, and when the vehicle is recycled, the electric wire is pulled to reinforce the vehicle body. It is intended to be securely removed from.

[0002]

2. Description of the Related Art Conventionally, an electric wire wired to an automobile has a ground terminal connected to its terminal, and the ground terminal is fixed to a vehicle body by bolting. For example, when two ground circuit wires are grounded to the vehicle body, as shown in FIG. 6 (A), the ground terminals 1a and 1b provided with bolt holes are crimp-connected to the wire w, and these ground terminals 1a, 1b are piled up and fastened to the bolt holes H of the vehicle body panel P by bolts B.

[0003] When an automobile is scrapped and disassembled, it is necessary to separate and collect it. Therefore, it is required to completely remove the electric wire from the vehicle body. In that case, the electric wire w whose ground terminals 1a and 1b are fixed to the vehicle body P by the bolt B is
It is necessary to remove the bolt B from the vehicle body P. However, the work of removing the electric wires from the vehicle body P is performed by hooking the hooks attached to the tip of the crane onto the wire harness composed of a plurality of electric wires and pulling it out from the members to which the electric wires composing the wire harness are connected. It is done by leaving it. That is, the work of removing the bolts B fixing the ground terminals to the vehicle body P one by one is very complicated and time-consuming, and is not performed during the vehicle body disassembly work.

Therefore, the ground terminals 1a and 1b are bolts B
The electric wire w that is more firmly fixed to the vehicle body P by
As shown in (B), the electric wire w is cut in the middle while the ground terminals 1a and 1b are fixed to the vehicle body P, or at the connection end with the ground terminals 1a and 1b (so-called under-neck position). The electric wire w is cut, and the cut electric wire w easily remains at the ground terminal 1.

In view of the above problems, the ground terminal 2 shown in FIG. 7 (A) has been proposed. The ground terminal 2 is the mounting portion 2b
A perforated slit 2a is provided on the base plate, and the ground terminal 2 can be easily disassembled by breaking at the slit 2a while the bolt is tightened.

[0006]

In consideration of workability, installation space, etc., in actual use of the ground terminal 2, as shown in FIG. 7B, a plurality of ground terminals 2A,
In many cases, 2B are overlapped and simultaneously fastened by bolts B. However, since the ground terminal 2B in the lower layer is covered with the ground terminal 2A in the upper layer, the ground terminal 2B
When pulling the electric wire w2 crimped to the ground terminal 2
The stress is not transmitted to the slit of B and the electric wire w2 is easily broken.

The present invention has been made in view of the above-mentioned problems, and in a terminal in which terminals of a plurality of wires for an earth circuit are gathered at one place and grounded to a vehicle body, the terminals are reliably separated when the vehicle is recycled. Then, the problem is to prevent the electric wire from being left in the vehicle body.

[0008]

In order to solve the above-mentioned problems, the present invention provides a plurality of terminal fitting portions projectingly provided on an earth body fixing member made of a conductive metal plate having a bolt insertion hole,
The terminal fitting portion has a female shape and has locking pieces projecting from the peripheral wall thereof, while the terminals connected to a plurality of electric wire terminals are inserted into the terminal fitting portions, respectively. Make electrical contact with the locking piece inserted and locked in the stop hole,
The grounding vehicle body fixing material is fastened to the vehicle body with bolts to connect multiple wires to the vehicle body, and the tensile force applied to each terminal when the multiple wires connecting these terminals are pulled when the vehicle body is disassembled. Then, the grounding structure of the electric wire is provided, wherein the electric wire is detached from the vehicle body by releasing the locking by the locking piece.

The locking piece provided on the terminal fitting portion of the earth body fixing member has a structure in which the upper wall of the female terminal fitting portion is cut and raised, and the tip is projected inward. Has the same shape as the lance (elastic locking piece) provided in the terminal housing chamber of the connector housing. When the terminal of the electric wire terminal is inserted into the terminal fitting portion of the earth body fixing material, the locking piece is inserted and locked in the locking hole of the terminal. Can be connected with one touch, and therefore, even if there are a plurality of electric wires and a plurality of terminals, the work of connecting with the ground body fixing material can be easily performed. Further, when attaching the wire harness to the vehicle, it is possible to simultaneously connect the plurality of ground circuit electric wires to the vehicle body at one location only by fixing the vehicle body fixing member for the earth to the vehicle body with bolts.

On the other hand, when the wire harness is removed from the vehicle body when the vehicle is dismantled, if the wire harness is hooked and pulled out, the pulling force is also applied to the terminal of the terminal of the ground circuit electric wire which constitutes the wire harness. , The locking piece is released by elastically deforming the locking piece, or by finally breaking the locking piece if the locking is not released by elastic deformation, the locking piece is released and the terminal is grounded. Separate from the fixing member. Also when breaking, it can be easily broken by making the locking piece thin. Therefore, it is possible to remove the terminal of the wire terminal while leaving the earth body fixing material bolted to the body on the body side,
It is not necessary to remove the bolt, and it is possible to reliably prevent the electric wire from breaking and part of the electric wire remaining on the vehicle body, and only the electric wire can be separately collected.

Further, unlike the conventional ground terminal provided with a bolt hole, the terminal connected to the end of the wire for the ground circuit is provided in the body fixing portion for ground and inserted into the female-shaped terminal fitting portion. Since the locking piece of the terminal fitting portion is inserted and locked in the locking hole, it can be used by connecting to the ground joint connector and locking with the lance in the connector.

The plurality of terminal fitting portions provided on the grounding vehicle body fixing member are arranged side by side in a part surrounding the bolt insertion hole.
In this way, since the terminal insertion portions are gathered in a part surrounding the bolt insertion hole and are arranged in parallel, for example, a plurality of ground body fixing members are made to communicate with the bolt insertion hole and the terminal fitting portions of each other are connected to each other. It can also be used by stacking them so that they do not collide. In that case, a larger number of electric wires can be grounded at the vehicle body at one place. In addition, if the terminal fitting portions are arranged in parallel, the terminals of a plurality of ground circuit wire terminals of one wire harness can be connected at close positions, so that the lengths of these ground circuit wires can be made the same. .

Further, a projection is provided on the outer surface of the terminal connected to the ground wire terminal, and a guide groove is provided in the inner surface of the terminal fitting portion of the ground vehicle body fixing member in the terminal insertion direction to connect the terminal to the terminal. It is preferable that the projection of the terminal is slid into the guide groove when the terminal is inserted into the fitting portion. With the above configuration, the insertion direction of the terminal into the terminal fitting portion is regulated, and the workability is improved.

[0014]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In the present embodiment, the terminals 10 crimped to the terminals of the two electric wires w1 and w2 for the ground circuit, respectively.
A terminal fitting portion 22 in which A and 10B are formed on a vehicle body fixing member 20 for ground which is fastened and fixed to a vehicle body panel P with bolts B.
The two electric wires w1 and w2 are simultaneously grounded to the vehicle body by being fitted and connected to A and 22B, respectively.

The terminals 10 (10A, 10B) are formed by bending a conductive metal plate punched into a required shape, and the insulation coating barrel 11a is formed from both sides of the rear portion of the substrate portion 11.
The core wire barrel 11b is projected, and the insulation coating of the electric wire w and the core wire are caulked and crimped to electrically connect the electric wire w and the terminal 10. The upper surface portion 14 and the side surface portion 1 are provided on the front portion of the substrate portion 11.
3, a square tubular portion composed of the lower surface portion 12 is formed by bending, and the tip thereof is an opening 16. The upper surface portion 14 is provided with a square locking hole 15 and a spring portion 14a which is folded back from the tip of the upper surface portion 14 into the inside of the cylinder. In addition, a part of the upper end of each side surface portion 13 has a protrusion 13a.
Is protruding.

The earth body fixing member 20 is made of a conductive metal plate, and one side of a square bolt stop plate portion 21 having a bolt insertion hole 21a formed at the center thereof is extended to fit two female terminal fittings. The joint portions 22 (22A, 22B) are provided so as to protrude in parallel. Each terminal fitting part 22 is a bolt stop plate part 2.
1. Both side surface portions 23 protruding upward from 1 and both side surface portions 23
Has a continuous upper surface 24 and a concave portion 24a formed by forming a step in the center of the upper surface portion 24. The thin concave portion 24a is provided with a locking piece 29 that is elastically deformed by cutting and raising. Is inclined inward and protrudes. Further, guide grooves 27 are provided in both ends of the inner surface of the upper surface portion 24 in the insertion direction X. The terminal fitting portion 22 has openings 26 and 28 in the front-rear direction, and an elastic plate 25 having a substantially L-shaped cross section which is projected from the bolting plate portion 21 is projected into the terminal fitting portion 22 through the opening 26. .

Next, a procedure for grounding the terminal 10 which is previously connected to the ground wire terminal to the vehicle body panel P will be described. Bolt insertion hole 2 of ground body fixing material 20
The bolt B is inserted into the la through the washer R, and is fixed to the vehicle body panel P by bolting. One terminal 10A crimped to the end of the electric wire w1 for the ground circuit is attached to the ground vehicle body fixing member 20 and the opening 2 of the one terminal fitting portion 22A is formed.
Insert in 8. The protrusion 13a of the terminal 10 is provided with the terminal fitting portion 22.
The elastic plate 2 is moved forward by being guided by the guide groove 27 inside A.
5 penetrates the opening 16 of the terminal 10A, and the spring piece 14a and the elastic plate 25 are elastically pressed into contact with each other to make electrical contact. Locking piece 29
Is elastically deformed by the upper surface portion 24 of the terminal 10A and
When A is moved forward and reaches the locking hole 15 of the terminal 10A, the locking piece 29 falls into the locking hole 15 and is locked, so that the terminal 10
A is connected to the vehicle body fixing member 20. The other terminal 10B crimped to the end of the other ground circuit electric wire w2 is also inserted and locked into the other terminal fitting portion 22B and coupled in the same manner as described above.

Next, a procedure for removing the electric wire w when the vehicle is disassembled will be described. Body panel P when the vehicle is disassembled
When the wire harness is removed from the wire harness, the electric wire w for the ground circuit, which is bundled in the wire harness, is also pulled by a crane or the like by a tensile force and is removed from the vehicle body panel P.

Specifically, as shown in FIG. 5, when the electric wire w1 is pulled, the engaging hole 1 of the terminal 10A is pulled by the pulling force.
When stress is applied to the locking piece 29 of the terminal fitting portion 22A whose tip is locked to 5, the locking piece 29 is elastically deformed to release the locking, or when the locking cannot be released, The locking piece 29, which is thin, is bent and destroyed. As a result, the terminal 1
0A can be detached from the terminal fitting portion 22A of the ground body fixing member 20, and the electric wire w1 can be reliably removed from the vehicle body P together with the terminal 10A while the ground body fixing member 20 remains on the body panel P. Even when the electric wire w2 is pulled, the terminal 10B is detached from the terminal fitting portion 22B in the same manner as above. If the electric wires w1 and w2 are electric wires that form the same wire harness, they are simultaneously removed from the ground body fixing member 20.

According to the above structure, the earth body fixing member 2
Since the two terminal fitting portions 22A and 22B are provided in 0, the two terminals 1 connected to the terminals of the two grounding electric wires
0A, 10B can be collected and installed in one place,
The mounting space can be reduced. Also, terminal 1
One-touch coupling is possible by simply inserting 0A and 10B into the terminal fitting portions 22A and 22B, respectively. Therefore, the workability of connecting the ground of the electric wire can be improved. In particular, when the terminal 10 is inserted into the terminal fitting portion 22, the protrusion 13 a on the outer surface of the terminal 10 is slid into the guide groove 27 of the terminal fitting portion 22, so that the terminal 10 is inserted into the terminal fitting portion 22. The insertion direction is restricted and workability is improved.

On the other hand, when the electric wires w1 and w2 are removed from the vehicle body when the vehicle is disassembled, the engagement between the engagement piece 29 and the engagement hole 15 can be easily and surely released by the tensile force applied to the electric wires w1 and w2. Therefore, the terminals 10A and 10B can be detached together with the electric wire while the grounding vehicle body fixing member 20 fastened to the vehicle body panel P by the bolt B is left on the vehicle body side. As a result, when the electric wires w1 and w2 are pulled at the time of dismantling the vehicle, the electric wires w1 and w2, which have been conventionally generated, are cut off in the middle of the electric wire w.
It is possible to reliably prevent a part of 1 and w2 from remaining on the vehicle body.

Further, the terminals 10A and 10B are provided with the upper surface portion 24 when they are inserted into the terminal fitting portions 22A and 22B.
Further, since it is continuously covered by the both side surface portions 23, the vibration resistance is enhanced and also dustproof measures can be taken to improve the electrical connection reliability. Furthermore, terminals 10A, 10
Since the spring piece 14a of B and the elastic plate 25 in the terminal fitting portions 22A and 22B are elastically pressed against each other, the reliability of electrical connection can be improved.

Furthermore, the two terminal fitting portions 22 are also provided.
Since A and 22B are provided only on one side of the bolt fastening plate portion 21, it is possible to use a plurality of grounding vehicle body fixing members 20 so that the terminal fitting portions 22 do not hit each other. The number of the terminal fitting portions provided on the ground body fixing member is not limited to two and may be three or more.

[0024]

As is apparent from the above description, according to the present invention, the terminals of a plurality of ground wire terminals are inserted into and locked in the terminal fitting portions of one ground body fixing member, respectively. It can be collected in several places and easily grounded to the vehicle body, improving grounding workability and reducing the installation space. Also, when removing the electric wire from the vehicle body when disassembling the vehicle, the grounded vehicle body fixing material that has been bolted can be left on the vehicle body and the electric wire can be detached from the terminal fitting part together with the terminal, so the electric wire is cut in the middle and partially Has various advantages such as solving the problem of remaining in the vehicle body.

[Brief description of drawings]

FIG. 1 is a perspective view of a terminal according to an embodiment of the present invention before being attached to a vehicle body.

FIG. 2 is a perspective view of the terminal after it is mounted on the vehicle body.

FIG. 3 is a partial cross-sectional perspective view of the terminal after it is attached to the vehicle body.

FIG. 4 is a cross-sectional view of the terminal after it is attached to the vehicle body.

FIG. 5 is a perspective view showing detachment of terminals.

FIG. 6A is a perspective view of a conventional terminal before being fixed to a vehicle body,
(B) is a perspective view showing a problem.

FIG. 7 shows another conventional example, (A) is a plan view of a ground terminal, and (B) is a perspective view showing a problem.

[Explanation of symbols]

10 terminals 13a protrusion 14a Spring piece 15 Locking hole 20 Ground body fixing material 21 Bolt stop plate 21a Bolt insertion hole 22 terminal fitting 25 elastic plate 26, 28 opening 27 Guide groove 29 Locking piece B bolt R washer P body panel w, w1, w2 ground circuit wire

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H02G 3/30 H02G 3/26 K 3/38 3/28 F (72) Inventor Hiroki Hirai Nagoya City, Aichi Prefecture 1-7-10 Kikuzumi, Minami-ku, Auto Network Technical Laboratory Co., Ltd. (72) Inventor Shigeki Sakai 1-7-10, Kikuzumi, Minami-ku, Nagoya City, Aichi Prefecture Auto Network Technical Laboratory, Inc. (72) Inventor Takashi Ota 1-10-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi F-term in Auto Network Technology Research Institute Co., Ltd. (reference) 5E012 BA12 5E021 FA03 FA09 FA14 FA16 FB09 FB20 FB30 FC25 FC31 FC40 HB11 HC31 HC33 HC37 LA09 LA30 5G363 AA16 BA02 DA12 DC02

Claims (2)

[Claims] 1. A plurality of terminal fitting portions projectingly provided on a grounding vehicle body fixing member made of a conductive metal plate having a bolt insertion hole,
The terminal fitting portion has a female shape and has locking pieces projecting from its peripheral wall, while the terminals connected to a plurality of electric wire terminals are inserted into the terminal fitting portions, respectively. A plurality of electric wires are grounded to the car body by bolting the grounding vehicle body fixing material to the car body with the locking piece inserted and locked in the stop hole, and connecting a plurality of these terminals. 2. When the electric wire is pulled when the vehicle body is disassembled, the electric force is applied to the terminals to release the locking by the locking piece, and the electric wire is detached from the vehicle body. 2. The ground connection structure for an electric wire according to claim 1, wherein the plurality of terminal fitting portions provided on the ground body fixing member are arranged side by side in a part surrounding a bolt insertion hole.