JP2003132970A - Combination earth terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid an earth terminal from broken and left out on a car body at scrapping of the car body, if a plurality of earth terminals are stacked together and bolted to the car body. SOLUTION: Related to earth terminals 10 and 20, the base plate is bent sideways at wire connection parts 19 and 29, with car-body fixing parts 11 and 21 comprising bolt holes H1 and H2 provided. In the combination earth terminals 10 and 20, the car-body fixing part 11 and 12 are stacked by two sheets with the bolt holes H1 and H2 communicated with each other, which is bolted to a car-body panel P. The part of the base plate corresponding to the root parts 17 and 27 of the car-body fixing part 11 and 21 of the earth terminals 10 and 20 is provided with easy-broken sections 16 and 26 along the outer edge of the car-body fixing parts 11 and 21 of the stacked other party, while not hidden. The easy-broken sections 16 and 26 are broken while the bolted car body fixing parts 11 and 21 are left out on the car body P side when wires W1 and W2 are removed from the car body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combined ground terminal, and more particularly, when a vehicle is recycled, the ground terminal breaks so that the bolt fixing portion of the ground terminal is left on the vehicle body side and the ground wire is left on the vehicle body. Without making it possible to leave.

[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, as shown in FIG. 12 (A), the end of the ground wire w is crimp-connected to the ground terminal 1, and the plurality of ground terminals 1 are stacked and fixed to the vehicle body P by the bolt B dedicated to ground.

When dismantling an automobile and disassembling it, it is necessary to separate and collect the automobile. Therefore, it is required to completely remove the wire harness from the vehicle body. In that case, for the ground wire w whose ground terminal 1 is fixed to the vehicle body P by the bolt B, it is necessary to remove the bolt B from the vehicle body P. However, the work of removing the wire harness from the vehicle body P is performed by hooking the hook attached to the tip of the crane to the wire harness and pulling it out, and the work of removing the bolts B one by one is very complicated and troublesome. For this reason, this is not done during the dismantling work of the vehicle body.

Therefore, the ground wire w whose ground terminal 1 is firmly fixed to the vehicle body P by the bolt B is shown in FIG.
As shown in (B), the ground wire w is cut in the middle while the ground terminal 1 is fixed to the vehicle body P, or the ground wire is disconnected at the connection end with the ground terminal 1 (so-called under-neck position). The ground wire w that has been cut and cut is likely to remain at the ground terminal 1.

In view of the above problems, a ground terminal 2 as shown in FIG. 13 (A) has been proposed. The ground terminal 2 is provided with a perforated slit 2a in the mounting portion 2b, and the ground terminal 2 can be easily disassembled by breaking at the slit 2a while the bolt is tightened.

[0006]

In the actual use of the above-mentioned ground terminal 2, in consideration of workability, installation space, etc., as shown in FIG. 13 (B), a plurality of ground terminals 2 are provided.
In many cases, A and 2B are overlapped and simultaneously fastened with a bolt B. However, since the ground terminal 2B of the lower layer is covered with the ground terminal 2A of the upper layer, when the ground wire w2 crimped to the ground terminal 2B is pulled, stress is not transmitted to the slit of the ground terminal 2B, and the ground wire 2B is not transmitted. w2
Causes a problem of easy fracture.

The present invention has been made in view of the above-mentioned problems. When the ground wire is pulled when the vehicle body is disassembled, the ground wire is broken at the ground terminal even when the ground terminals are used in a piled manner. The challenge is not to leave them.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems, according to the present invention, a board is bent sideways from an electric wire connecting portion so that a ground terminal provided with a vehicle body fixing portion having a bolt hole is connected to the bolt hole. A combined ground terminal in which two vehicle body fixing parts are stacked and fixed to a vehicle body panel by bolts, and the board corresponding to the root part of the vehicle body fixing part of each of the above-mentioned ground terminals has an outer edge of the other body fixing part. A combined ground terminal characterized in that an easily destructible portion is provided at a position that does not hide along the line and that the easily destructible portion is broken while leaving the vehicle body fixing portion bolted when the electric wire is removed from the vehicle body on the vehicle body side. Are offered.

With the above structure, in a state where the combined ground terminals are overlapped and bolted and fixed to the vehicle body,
Since the easily destructible part of each ground terminal is provided at a position where the other ground terminal is not overlapped, when the ground wire connected to one of the ground terminals is pulled, it interferes with the other ground terminal. It is possible to directly apply a tensile force to the easily destructible portion and break it without being damaged, and the ground wire can be reliably removed from the vehicle body with the vehicle body fixing portion left on the vehicle body side. The easily destructible portion may be along the outer edge of the overlapping vehicle body fixing portion, or may be along a slightly separated state.

The electric wire connecting portion of the earth terminal is composed of a crimp terminal for projecting an insulating coating barrel and a core wire barrel from the substrate and crimping and connecting the electric wire end with these barrels. The tip of the protruding portion of these barrels is connected. The substrate is bent sideways to provide the vehicle body fixing portion. It should be noted that a pressure contact type terminal that pressure contacts the wire end may be used. A bolt hole is provided in the center of the vehicle body fixing portion, and a lock claw and a locking groove for locking the two vehicle body fixing portions are provided on both sides of the bolt hole. The two ground terminals that are stacked are
Since it is exposed without being hidden by the other ground terminal when viewed from above or below, it can be bolted to the vehicle body panel without worrying about the front and back of the mounting surface of the ground terminal to be combined.

The easily destructible portion is a thin portion or a through hole formed at a distance, and is provided in the root portion of the vehicle body fixing portion so as to cross in an L shape from one end to the other end. The thin portion may be continuously provided along the transverse breaking line or may be provided at intervals, and is a V-shaped groove or a U-shaped groove. When the ground wire is pulled, stress concentrates on these thin portions or through holes, and the ground wire can be easily broken. It should be noted that the thin portion and the through hole may be provided together, and in this case, breakage at the thin portion is promoted and breakage can be further facilitated. The thin-walled portion or the through-holes provided at intervals are provided at the above-mentioned positions,
The ground terminal of the lower layer is a position where it is not hidden by the body fixing portion of the ground terminal of the upper layer, and the ground terminal of the upper layer is a position where it is not hidden by a washer that is attached and fastened to the bolt shaft. In this way, the easily destructible part is attached to the base part of the vehicle body fixing part by L
Since it is provided in the shape of a letter, it can be broken from the outer end positions on both sides, and the bolt fixing portion and the wire connecting portion can be reliably broken at the root of the vehicle body fixing portion.

In the easily destructible portion, it is preferable that a through hole is provided at an intersecting position of a center axis of the wire connecting portion and a circle centered on the bolt hole. Since the through hole is located on the central axis of the electric wire connecting portion on which the tensile force acts, when the ground wire is pulled, the tensile force is directly transmitted to the through hole, and the through hole is set as the break start position. It is easy to break.

Further, a reinforcing rib composed of a bent portion is provided along an outer end of the substrate extending axially from the electric wire connecting portion, and the reinforcing rib is provided along a part of the easily destructible portion. Is preferred. As described above, when the reinforcing ribs are provided, the rigidity is increased, the tensile force applied to the electric wire can be transmitted to the tip of the electric wire connecting portion in the axial direction, and the stress is concentrated on the easy-to-break portion to make the easy-to-break portion. It is possible to reliably perform the break along the line.

[0014]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 show a first embodiment. The combined ground terminal of the first embodiment includes the first ground terminal 10 and the second ground terminal 20, and the terminals of the electric wires w1 and w2 of different wire harnesses routed to the automobile are respectively connected to the first ground terminal 10 and the second ground terminal 20. 2 The ground terminal 10 is crimp-connected. The first ground terminal 10 and the second ground terminal 20 are superposed on each other and are collectively fastened to the vehicle body P by bolts B to be grounded to the vehicle body. When removing the wire harness from the vehicle body during vehicle disassembly, the electric wire w fixed to the vehicle body by one bolt B
Since 1 and the electric wire w2 are electric wires of different wire harnesses, they can be pulled separately.

First ground terminal 10 and second ground terminal 20
The substrate is substantially L-shaped, and the insulation coating barrels 19A and 29A and the core barrels 19B and 29B are projected from both sides in the width direction on one side to form the electric wire connecting portions 19 and 29, and the portion bent to the side is the vehicle body. The fixed parts 11 and 21 are used. Bolt holes H1 and H2 are provided in the center of the vehicle body fixing portions 11 and 21, and locking pieces 1 are provided on both sides of the bolt holes H1 and H2 to be overlapped with the counterpart vehicle body fixing portion.
3, 14, 23, 24 and locking grooves 15, 25 are provided.

More specifically, the vehicle body fixing portion 11 has a step portion 13
Lock pieces 13, 1 provided with b and 14b and projected downward
4 is provided in a direction perpendicular to the axis of the electric wire connection portion 19, and a locking claw 13a is provided on the upper surface of the lock piece 13 so as to project.
Forming holes 14a are formed in the holes. The vehicle body fixing part 21 is
Specifically, the lock pieces 23 and 24 provided with the step portions 23b and 24b and projected upward are provided in the direction perpendicular to the axis of the electric wire connecting portion 29, and the lock piece 23 is formed with the shape stop hole 13a.
Forming claws 14a are provided on the lower surface of the lock piece 14 so as to project therefrom.

Reinforcing ribs 18 and 28 are provided by folding back both ends of the root portions 17 and 27 where the vehicle body fixing portions 11 and 21 are bent from the electric wire connecting portions 19 and 29, and the reinforcing ribs 18 and 28 contact the electric wires. It projects along the outer edge of the portion 19 parallel to the axial direction X.

The root portion 17 has a first ground terminal 1
In the state where the vehicle body fixing portion 11 of 0 and the vehicle body fixing portion 21 of the second earth terminal 20 are overlapped with each other, the other earth terminal 10
An easily destructible portion including a thin portion 26 (16) having a V-shaped cross section is provided at a position along the outer edge of the vehicle body fixing portion 11 (21) of (20) and visible from the outside without being hidden by the vehicle body fixing portion 11 (21). ing. The position along the outer edge of the vehicle body fixing portion of the counterpart ground terminal 10 (20) is located from the inner end position of the bent portion of the substrate to the tip along the reinforcing rib 18 (28).
It will be a letter-shaped crossing line. The thin portions 16 and 26 are located along the L-shaped transverse line, and the root portions 17 and 2 are
7 extends from one end to the other end.

First earth terminal 10 and second earth terminal 20
In the combination procedure with, the second ground terminal 20 is stacked from below the first ground terminal 10 so that the lock piece 24 of the second ground terminal 20 is located in the insertion hole H1 of the first ground terminal 10. In that state, the first and second ground terminals 10 and 20
2 is slid in the proximity direction, as shown in FIG. 2, the step portions 13b, 14b, 23b, 24b and the retaining grooves 15, 2 are formed.
5 are fitted to each other, and the locking claws 13a and 24a
The first grounding terminal 10 and the second grounding terminal 20 are laminated and fixed in a state in which is locked in the locking holes 14a and 23a.

When wiring the wire harness to the vehicle body and connecting the first and second ground terminals 10 and 20 to the vehicle body by bolts, as shown in FIG. 4, the first ground terminal 10 and the first ground terminal 10 are connected to each other. 2 Bolt hole H1 through which the ground terminal 20 communicates,
With H2 aligned with the through hole Pa of the vehicle body panel P,
The washer R is passed through a bolt B attached to the shaft portion, and is fastened and fixed to a nut on the rear surface side of the vehicle body panel P.

As shown in FIGS. 4 and 6, in the state where both ground terminals 10 and 20 are fixed to the vehicle body panel P in this manner, as shown in FIGS.
The thin portions 26 of the ground terminal 20 are both provided at positions that are not hidden when viewed from above. That is, the thin portion 26 of the second ground terminal 20 located in the lower layer is the first ground terminal 10
Also, it is exposed without being covered by the washer R, and the thin portion 16 of the upper first ground terminal 10 is also exposed without being covered by the washer R.

When the vehicle is dismantled, the wire harness is locked by the hook of the crane and pulled to be removed from the vehicle body, and the ground wires w1 and w2 belonging to different wire harnesses are separately pulled and removed from the vehicle body. Becomes Therefore, tensile forces are separately applied to the first ground terminal 10 and the second ground terminal 10, which are connected to the ground wires w1 and w2, respectively.

As shown in FIG. 7A, when the ground wire w1 crimped to the first ground terminal 10 is pulled, the root portion 1 of the vehicle body fixing portion 11 fastened and fixed with the bolt B is fixed.
7 and the electric wire connecting portion 19 pulled by the electric wire w1, stress concentrates on the thin portion 16, and as shown in FIG. 4 (B), the thin portion 16 is easily broken to break the ground wire w1. Disengages with the root portion 17. At this time, the thin portion 16 is not covered with the washer R, the pressing force of the washer R does not act, and the rigidity of the root portion 17 is enhanced by the reinforcing rib 18 in the same axial direction as the wire connecting portion 19. As a result, stress concentrates on the thin portion 16 and the thin portion 16 is easily broken. Therefore, the wire connecting portion 19 connected to the ground wire w1 is separated from the vehicle body fixing portion 11 fixed by the bolt B, and the ground wire w1 can be completely removed from the vehicle body.

Then, when the ground wire w2 crimped to the second ground terminal 20 is pulled, the root portion 27 of the vehicle body fixing portion 21 fastened and fixed by the bolt B and the electric wire w are pulled in the same manner as described above.
The stress concentrates on the thin portion 26 provided between the wire connecting portion 29 pulled by 2 and the ground wire w by easily breaking at the thin portion 26 as shown in FIG. 4C.
2 separates with the root portion 27. At this time, the thin portion 26
Is not covered by the washer R and the vehicle body fixing portion 11, and the pressing force of the washer R and the vehicle body fixing portion 11 does not act, and
Since the rigidity of the root portion 27 is increased by the reinforcing ribs 28 in the same axial direction as the wire connecting portion 29, stress concentrates on the thin portion 26, and the thin portion 26 is easily broken. Therefore, the wire connecting portion 29 connected to the ground wire w2 is separated from the vehicle body fixing portion 21 fixed by the bolt B, and the ground wire w2 can be completely removed from the vehicle body.

Further, the above procedure is performed by the first ground terminal 10 →
Although the case where the second ground terminal 20 is disconnected in this order has been described, the ground terminals 10 and 20 of the present invention are also separated in the order of the second ground terminal 20 and the first ground terminal 10.
Does not impair easy dismantling.

Specifically, as shown in FIGS. 8A and 8B, although the second ground terminal 20 is located at the lowermost layer, the thin portion 26 covers the washer R and the first ground terminal 10. Since the ground wire w2 is not exposed and is exposed when viewed from above, when the ground wire w2 is pulled, the ground wire w2 is not disturbed by the first ground terminal 10 and is broken at the thin portion 26 so that the root portion of the ground wire w2 is not disturbed. The ground wire w2 can be disconnected together with 27.

In this embodiment, the thin portions 16 and 26 are
Is cut out on the upper surface side of the first ground terminal 10 and the second ground terminal 20, but it may be cut off on the lower surface side or on both sides. Furthermore, even if the first ground terminal 10 and the second ground terminal 20 are not used in a stacked manner,
Each of them can be used alone, and even in that case, they are preferably used without impairing the easy dismantling property.

9 and 10 show the second embodiment. The difference from the first embodiment is that through holes 16a 'and 26a' are formed in a part of the thin portions 16 'and 26' of the first ground terminal 10 'and the second ground terminal 20'. is there.

The first ground terminal 10 'and the second ground terminal 20' are provided with through holes 16a ', 26a' at the corners of the L-shaped thin portions 16 ', 26'.
6a 'and 26a' are bored at the intersections of the central axes of the electric wires w1 and w2 and the concentric circles of the bolt holes H1 and H2.

As shown in FIG. 10, when the ground wire w1 is pulled, stress concentrates on the continuous ends 16a-1 'and 16a-2' with the thin portion 16 'of the through hole 16a' on the axis of the ground wire w1. Therefore, the continuous ends 16a-1 ', 16a-
It is easy for the thin portion 16 'to be fractured with 2'as the fracture start position.

In this embodiment, the through holes 16a ',
26a 'is provided only at one place on a part of the thin portions 16' and 26 ', but it may be provided at a plurality of places. Further, the other configurations are similar to those of the first embodiment, and therefore the description thereof will be omitted.

FIG. 11 shows a third embodiment. The difference from the first embodiment is that perforated through holes 16 "and 26" are provided as the easily destructible portion instead of the thin portion.
That is, the perforation-shaped through holes 16 "and 26" are located along the L-shaped transverse line as in the first embodiment, and extend from one end to the other end of the root portions 17 "and 27".

Also in the above structure, when the electric wires w1 and w2 are pulled, stress is concentrated in the perforated through holes 16 "and 26", so that the first and second ground terminals 10 "and 2" are connected.
0 "is broken, and electric wires w1 and w2 are root portions 17", 2
It can be removed together with the 7 ". Through hole 1
At least one of 6 "and 26" is a wire connecting portion 1
By being on the 9 "and 29" axis, stress concentration is enhanced.

[0034]

As is apparent from the above description, according to the present invention, in the state where the combined ground terminals are overlapped and fixed to the vehicle body by bolts, the easily destructible portion is at a position where the mating ground terminal is not overlapped. When the ground wire connected to one of the ground terminals is pulled, it is ruptured by directly applying a tensile force to the easily destructible part without being disturbed by the other ground terminal. Therefore, the ground wire can be reliably removed from the vehicle body with the vehicle body fixing portion left on the vehicle body side.

The easily destructible portion is formed of a thin portion or through holes formed at intervals, and is provided at the base portion of the vehicle body fixing portion so as to traverse in an L shape from one end to the other end, thereby providing a ground wire. When pulled, it can be broken from both outer end positions of the easily destructible portion, and the bolt fixing portion and the wire connecting portion can be surely broken at the root side of the vehicle body fixing portion. Also,
If it is provided together with the thin portion and the through hole, the breakage in the thin portion is promoted and the breakage can be further facilitated.

By providing a through hole in the easily breakable portion at the intersection of the center axis of the wire connecting portion and the circle centered around the bolt hole, the tensile force to the wire is directly applied to the through hole. It is transmitted, and the breakage is facilitated with the through hole as the break start position. Further, when a reinforcing rib is provided along the outer end of the substrate extending on the axis from the electric wire connecting portion so as to extend along a part of the easily destructible portion, the rigidity is increased and the electric wire is loaded. The tensile force can be transmitted to the tip of the electric wire connecting portion in the axial direction, and the stress can be concentrated on the easily destructible portion, so that the breaking along the easily destructible portion can be reliably performed.

[Brief description of drawings]

FIG. 1 is a perspective view of a combined ground terminal according to a first embodiment of the present invention before being combined.

FIG. 2 is a perspective view of a combined ground terminal after combination.

FIG. 3 is a perspective view of a combined ground terminal before being attached to a vehicle body.

FIG. 4 is a perspective view of a combined ground terminal after being attached to a vehicle body.

FIG. 5 is a side view of the combined ground terminal after being attached to the vehicle body.

FIG. 6 is a cross-sectional view of a combined ground terminal after being attached to a vehicle body.

7 (A), (B), and (C) are drawings showing the work of removing the combined ground terminal.

8 (A) and 8 (B) are drawings showing the work for removing the combined ground terminal.

FIG. 9 is a perspective view of a combined ground terminal of the second embodiment.

FIG. 10 is a perspective view of the combined ground terminal after being attached to the vehicle body.

FIG. 11 is a perspective view of a combined ground terminal according to a third embodiment.

FIG. 12 (A) is a perspective view showing a conventional ground terminal,
(B) is a drawing showing a problem.

13A is a top view of another conventional ground terminal, FIG.
(B) is a drawing showing a problem.

[Explanation of symbols]

10 First ground terminal 11,21 Mounting part 13, 14, 23, 24 Locking pieces 13a, 24a Lock claw 14a, 23a Locking hole 15, 25 notches 16, 26 Thin part (easily destructible part) 17, 27 Board part 18, 28 Reinforcing rib 19, 29 Wire connection part 20 Second ground terminal 16a ', 26a' through holes 16 ", 26" penetration H1 and H2 bolt holes P body panel Pa through hole w1, w2 ground wire

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H02G 3/30 H02G 15/08 M 3/38 3/26 K 15/08 3/28 F (72) Invention Hiroki Hirai 1-7-10 Kikuzumi, Minami-ku, Aichi Prefecture, Aichi Prefecture, Auto Network Technology Laboratory Co., Ltd. (72) Inventor Takashi Ota, 1-7, Kikusumi, Minami-ku, Nagoya City, Aichi Prefecture Auto Network Technology Laboratory Co., Ltd. (72) Inventor Shigeki Sakai 1-7-10 Kikuzumi, Minami-ku, Aichi Prefecture Auto Network Technology Research Institute Co., Ltd. (72) Inventor Ryoji Tsuji 1-7-10, Kikuzumi, Minami-ku, Nagoya City, Aichi Prefecture Co., Ltd. F-term in Auto Network Technology Laboratory (reference) 5E012 BA12 5G355 AA03 BA01 BA12 CA35 5G363 AA13 BA02 DA12 DC02 5G375 AA02 CA07 CA17 CC07 DA36 DB13

Claims (4)

[Claims] 1. A ground terminal provided with a vehicle body fixing portion having a bolt hole by bending a board sideways from an electric wire connecting portion and connecting two bolts to the vehicle body fixing portion so that the vehicle body panel is bolted. A combined ground terminal to be tightened and fixed, wherein a board which is a root portion of the vehicle body fixing portion of each of the above-mentioned earth terminals is provided with an easily destructible portion along the outer edge of the overlapping vehicle body fixing portion and not easily hidden. The combined ground terminal is characterized in that the breaking portion is configured to be broken when the electric wire is removed from the vehicle body, leaving the vehicle body fixing portion bolted to the vehicle body side. 2. The easily destructible portion is a thin wall portion or a through hole formed at intervals, and is provided so as to cross in an L shape from one end to the other end of the root portion of the vehicle body fixing portion. Item 1. The combined ground terminal according to Item 1. 3. The combined earth terminal according to claim 2, wherein the easily destructible portion is provided with a through hole at an intersecting position of a center axis of the electric wire connecting portion and a circle centered on the bolt hole. 4. A reinforcing rib composed of a bent portion is provided along an outer edge of the substrate extending in a straight line direction from the wire connecting portion, and the reinforcing rib extends along a part of the easily destructible portion. The combined ground terminal according to any one of claims 1 to 3.