JPH08250165A - Earth structure - Google Patents

Abstract

PURPOSE: To enhance the efficiency for the work of assembling earth terminals to studs by eliminating the need for a connecting wire between the earth terminals. CONSTITUTION: Complex terminals 10 and connecting terminals 20, both of which are connected to earth wires W extending from the equipment side, are fitted around stud bolts 30. The two stud bolts 30, 30 can conduct electricity to each other by means of a conducting connection 17. Since a connecting wire is not used as a conduction means between the stud bolts 30, 30, the processes of peeling resin coating and pressing the terminals against the resin coating and cores are not required as the conduction means between the stud bolts 30, 30, so an excellent assembly operability is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground structure for grounding at a plurality of positions.

[0002]

2. Description of the Related Art For example, in a vehicle-mounted electronic device having a built-in computer or the like, it is necessary to securely ground the vehicle body to prevent malfunction. As a structure therefor, conventionally, as shown in FIG. 9, two stud bolts 1, which are provided on a ground panel (not shown) by screwing at a predetermined ground position with an interval of, for example, about 30 mm.
A structure in which two ground terminals 3 each connected to a ground electric wire 2 from an electronic device are fitted to each other and fixed by tightening a stud bolt 1 has been adopted.
In this case, in order to prevent the potential difference between the ground terminals fitted to the stud bolts 1 as much as possible, the ground terminals 3 and 3 are further commonly connected by the crossover wire 4.

[0003]

However, in the conventional grounding structure, it is necessary to commonly connect the ground terminals 3, 3 with the crossover wire 4, so that the crossover wire 4 can be assembled when the stud bolt 1 is assembled. Strip resin coating 4A and remove core wire 4B
And a step of crimping the exposed core wire 4B to the ground terminal 3 are required, resulting in a decrease in work efficiency.

The present invention was devised in view of the above circumstances, and does not require a connecting wire between the ground terminals to improve the efficiency of the work of assembling to the stud, although the ground connection is made at a plurality of positions. The purpose is to achieve.

[0005]

According to a first aspect of the present invention, a plurality of grounding studs, which are provided at a distance from each other, are grounded to a grounding wire from the device side. Composite terminal fittings that integrally include a plurality of ground terminals that can be fixed together and a transitional conduction part that connects these ground terminal parts together, and fit to the studs in a state where they are stacked on each ground terminal part of this composite terminal fitting. The present invention is characterized in that it is provided with a connection terminal fitting that is fixed and to which an earth wire from the device side is connected.

According to a second aspect of the present invention, in the first aspect of the present invention, an electric wire connecting portion to which a ground electric wire from the device side is connected is formed in the transitional conducting portion of the composite terminal fitting. It has characteristics.

[0007]

According to the invention of claim 1, the ground terminal portions of the composite terminal fitting are respectively fitted to the studs, and the connection terminal fitting to which the ground wire from the device side is connected is placed on the ground terminal portion. To the stud and fix all terminals to the stud. As a result, each ground wire is grounded to the stud through the connection terminal fitting.
Further, since the ground terminal portions are commonly connected by the crossover conducting portion provided integrally with them, they are easy to handle as parts, and the common connection work using the crossover wire is unnecessary.

According to the second aspect of the present invention, by connecting the ground electric wire to the electric wire connecting portion provided in the transitional conducting portion,
This earth wire can also be connected to earth.

[0009]

According to the first aspect of the present invention, since the crossover wire between the ground terminals is unnecessary, various work for connecting the crossover wire is not necessary, and the efficiency of the work of assembling to the stud is improved. Can be achieved. According to the invention of claim 2, since the composite terminal fitting also has the function of the connection terminal fitting,
The effect that the number of the whole terminal metal fittings can be reduced is acquired.

[0010]

【Example】

<Example 1> Hereinafter, Example 1 embodying the present invention will be described with reference to FIG.
It will be described with reference to FIGS. The grounded panel (not shown) is formed with two female screw holes (not shown) at predetermined intervals of, for example, about 30 mm, and each female screw hole is formed in each female screw hole. A stud bolt 30 having a male screw portion 30A and a flange portion 30B is attached by screwing. The two positions where the stud bolt 30 is attached serve as ground terminals.

As the grounding terminal fittings fitted to the stud bolts 30, one composite terminal fitting 10 and two connecting terminal fittings 20 are used. Composite terminal fitting 10
Is composed of two ground terminal portions 11, 11, a transitional conducting portion 17 connecting the two ground terminal portions 11, 11, and an electric wire connecting portion 19. Each ground terminal portion 11 is arranged so as to be passed between two plate-shaped mounting portions 12 and 12 arranged in parallel with each other with a space provided therebetween and one end portions of the both mounting portions 12 and 12. Arranged plate-shaped locking portion 13
And a plate-shaped receiving portion 1 arranged so as to be passed between the end portions of the both mounting portions 12, 12 opposite to the locking portion 13.
4 and. Both the mounting portions 12 and 12 are on the same plane, and the locking portion 13 and the receiving portion 14 are on the same plane. Then, the locking portion 13 and the receiving portion 14 are both attached portions 1.
The height is set to be 2, 12 with a step corresponding to the plate thickness.

The locking portion 13 has a connection terminal fitting 2 which will be described later.
The locking claw 13A for engaging with the locking hole 25A of 0 is formed by cutting and raising. The receiving portion 14 is formed with a projecting portion 15 projecting to the side opposite to the locking portion 13, and the projecting portion 15 is formed with a locking hole 15A for engaging with the locking claw 23A of the connection terminal fitting 20. There is.

The space surrounded by both the mounting portions 12, 12, the locking portion 13 and the receiving portion 14 is a fitting hole 16 for fitting with the stud bolt 30. An arcuate positioning portion 16A serving as a guide for the male screw portion 30A of the stud bolt 30 is formed at a side edge of the receiving portion 14 among the hole edges of the fitting hole 16.

The crossover conducting portion 17 has a rectangular flat plate shape, and one side edge of both ends of the crossover conducting portion 17 is on the locking portion 13 side of one mounting portion 12 of each ground terminal portion 11. Is continuous with the outer edge of the end portion of the above, and thereby the crossover conducting portion 17 and the two ground terminal portions 11, 11 are integrated. In the two ground terminal portions 11 and 11 connected by the crossover conducting portion 17, the receiving portions 14 and 14 face in mutually opposite directions, and the distance between the centers of the fitting holes 16 and 16 is the two ground terminal portions. The positional relationship is such that it matches the distance between them.

The transition conducting portion 17 has its ground terminal portion 1
An extension portion 18 is formed so as to project from a central position in the longitudinal direction of a side edge on the side opposite to 1. The extension portion 18 is provided with side walls from both side edges of the extension portion 18.
9 are provided. The wire connecting portion 19 is composed of an insulation barrel 19A and a wire barrel 19B. The insulation barrel 19A is crimped onto the resin coating Wa at the end of the ground wire W from the device side, and the wire barrel 19B is connected to the ground wire W. The exposed core wire Wb from which the resin coating Wa has been peeled off is crimped.

On the other hand, the connection terminal fitting 20 is the ground terminal portion 2
1 and an electric wire connecting portion 29. Ground terminal part 2
1 has the same structure as the ground terminal portion 11 of the composite terminal fitting 10, and includes two mounting portions 22, 22, a locking portion 23, and a receiving portion 24. The engaging portion 23 and the receiving portion 24 are set to have a height with respect to both the mounting portions 22 and 22 by a step corresponding to the plate thickness.
It is upside down from the ground terminal portion 0 of 0. The engaging portion 23 is formed with an engaging claw 23A that engages with the engaging hole 15A of the composite terminal fitting 10, and the protrusion 25 of the receiving portion 24 engages with the engaging claw 13A of the composite terminal fitting 10. Stop hole 25A
Are formed. Further, the arc-shaped positioning portion 26A
A fitting hole 26 having is formed.

Further, the electric wire connecting portion 29 is provided on the one mounting portion 2
2 is provided at a portion of the end portion on the side of the locking portion 23 that extends the outer edge on the side opposite to the locking portion 23, and, like the wire connecting portion 19 of the composite terminal fitting 10, is connected from the device side. It comprises an insulation barrel 29A crimped onto the resin coating Wa of the ground wire W and a wire barrel 19B crimped onto the core wire Wb of the ground wire W.

Next, the operation of this embodiment will be described.
When the ground wire W from the device side is grounded using the composite terminal fitting 10 and the connection terminal fitting 20, first, the wire connecting portion of the connection terminal fitting 20 is connected to the end of the ground wire W from the device side. 29 and the wire connecting portion 19 of the composite terminal fitting 10 are connected by crimping, and the ground terminal portions 11 and 21 of the composite terminal fitting 10 and the connection terminal fitting 20 are assembled together.

As shown in FIG. 2, the assembly of the ground terminal portions 11 and 21 is such that the direction of the steps of the engaging portions 13 and 23 and the receiving portions 14 and 24 with respect to the mounting portions 12 and 22 is the direction of the composite terminal fitting 10. And the ground terminal portion 20 are arranged so that they are upside down, and the receiving portions 14 and 24 are stacked so as to correspond to the mating holes 26 and 16 of the mating side. The fitting portions 12 and 22 are slid in the longitudinal direction so as to be aligned, and the locking claws 13A and 23A and the locking holes 25A and 15A are fitted. As a result, the composite terminal fitting 10 and the connection terminal fitting 20 are inseparably assembled and integrated. At this time, the fitting holes 16 and 26 of the composite terminal fitting 10 and the connecting terminal fitting 20 are aligned with their centers aligned, and both arc-shaped positioning portions 16A and 26A are located on the same circle and the stud bolt 30 is positioned. Male screw part 30
Corresponds to the outer circumference of A.

The composite terminal fitting 10 and the two connecting terminal fittings 20, 20 assembled together in this way are placed on a grounding panel and positioned so that the fitting holes 16, 26 are aligned with the female screw holes. And two stud bolts 3
0 and 30 are passed through the fitting holes 16 and 26 and screwed into the female screw holes and tightened. As a result, the composite terminal fitting 10 and the connection terminal fittings 20, 20 are connected to the grounding panel in a state where the ground terminal portions 11, 21 that are overlapped are sandwiched between the flange portion 30B of the stud bolt 30. To be done.

In this state, the two stud bolts 30, 30 and the ground terminal portions 11, 21 fitted to the two stud bolts 30, 30.
All the ground wires W are connected to each other by the stud bolts 3 which are electrically connected to each other by the crossover conductive portion 17.
It is in a state of being connected to both 0 and 30. This allows
The equipment can be reliably grounded, and there is no risk of a potential difference occurring between the two stud bolts 30, 30, and malfunctions of the equipment due to grounding failure can be reliably prevented.

In the grounding structure of the present embodiment, the composite terminal fitting 10 having the crossover conducting portion 17 is used as a means for electrically connecting the two stud bolts 30, 30. Both stud bolts 30, 3
Compared to the structure in which the wire is electrically connected over zero, the work of stripping the resin coating of the wire or crimping the wire is unnecessary, and the work efficiency of the ground connection work is excellent. Moreover,
Since the crossover conducting portion 17 is integrated with the ground terminal portion 11,
The handling of the composite terminal fitting 10 as a component is also easy.

Further, in this embodiment, the composite terminal fitting 10
Since the connection terminal fitting 20 and the connection terminal fitting 20 are integrally assembled with each other, the ground terminal portions 11 and 21 are easy to handle and the two stud bolts 30 and 30 are provided.
It has excellent workability because it can be fitted to

As another usage mode in this embodiment, when the number of ground wires W is small, only one connecting terminal fitting 20 is used, or no connecting terminal fitting 20 is used at all. Connect the ground wire W to the composite terminal fitting 10
You can also just connect to. Also in this case, since each ground wire W is connected to both of the two stud bolts 30, 30, the ground can be reliably grounded.

<Second Embodiment> Next, a second embodiment of the present invention will be described with reference to FIGS. Example 2
In Example 1, the shapes of the ground terminal portions of the composite terminal fitting and the connection terminal fitting are different. Since other configurations are the same as those in the above-described first embodiment, the same components are designated by the same reference numerals and the description thereof will be omitted.

Both the ground terminal portion 41 of the composite terminal fitting 40 and the ground terminal portion 51 of the connection terminal fitting 50 are circular and have a circular fitting hole 4 into which the stud bolt 30 can be fitted.
6, 56 are formed concentrically. This composite terminal fitting 4
When the ground wire W is grounded using 0 and the connection terminal fitting 50, first, the composite terminal fitting 40 is placed on a grounding panel (not shown) and the two fitting holes 46,
46 is aligned with the female screw hole (not shown) of the grounding panel, the connection terminal fittings 50, 50 are placed thereon, and the respective fitting holes 56, 56 are fitted into the fitting hole 46 of the composite terminal fitting 40. , 4
6, the stud bolts 30, 30 are passed through the fitting holes 46, 56 in this state, and screwed into the female screw holes for tightening. As a result, all the ground electric wires W are electrically connected to each other via the crossover conducting portion 47.

<Third Embodiment> Next, a third embodiment of the present invention will be described with reference to FIG. In the third embodiment, each ground terminal portion 4 of the composite terminal fitting 40 of the second embodiment is.
1, 41, a pair of ribs 42 rising from the periphery thereof,
42 is formed. The ribs 42 can prevent lateral displacement between the ground terminal portions 41 and 51 when the connection terminal fitting 50 is placed on the composite terminal fitting 40.

The ribs 42 are not a pair, but for example,
They may be formed with an angular interval of 20 °. Also, after placing the ground terminal portion 41 of the connection terminal fitting 40, the rib 42
May be bent inward. In this way, the lateral displacement of the ground terminal portions 41, 51, the vertical disengagement, and the like are restricted, so that the workability is improved.

<Fourth Embodiment> Next, a third embodiment of the present invention will be described with reference to FIGS. Example 4
In the first embodiment, the shapes of the ground terminal portions of the composite terminal fitting and the connection terminal fitting are different. Since other configurations are the same as those in the above-described first embodiment, the same components are designated by the same reference numerals and the description thereof will be omitted.

The ground terminal portion 61 of the composite terminal fitting 60 and the ground terminal portion 71 of the connection terminal fitting 70 both have a square shape and a circular fitting hole 6 into which the stud bolt 30 can be fitted.
6, 76 are formed. A pair of elastic pressing pieces 62, 62 are formed on the ground terminal portion 61 of the composite terminal fitting 60 so as to overhang.
A protrusion 63 is formed on the lower side (upper side of the ground terminal portion 61). On the other hand, a locking hole 72 corresponding to the protrusion 63 is formed in the ground terminal portion 71 of the connection terminal furniture 70.

The composite terminal fitting 60 and the connecting terminal fitting 7
When the ground wire W is grounded using 0, when the connection terminal fitting 70 is slid from the outside with respect to the composite terminal fitting 60 and the elastic pressing piece 62 is elastically bent, the fitting hole 66, Protrusion 63 when 76 is aligned
And the locking hole 72 are fitted, and in this fitted state, the elastic pressing piece 6
It is held by the elasticity of 2. As a result, the composite terminal fitting 60 and the connecting terminal fitting 70 are assembled together, so that the composite terminal fitting 60 and the connecting terminal fitting 70 are mounted on the grounding panel, and the fitting holes 66 and 76 are aligned with the female screw holes of the stud bolt 30.
Screw in.

<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition to the above, various modifications can be made without departing from the scope of the invention.

(1) In the above embodiment, the case where the electric wire connecting portion is formed on the composite terminal metal fitting has been described. However, according to the present invention, the electric wire connecting portion is not formed on the composite terminal metal fitting, and the composite terminal metal fitting is used. It is also possible to adopt a configuration having a dedicated function only for establishing electrical continuity between the two stud bolts. .

(2) In the above embodiment, the description has been made of the case where the composite terminal fitting and the connecting terminal fitting are each connected to two ground wires W, but according to the present invention, they are connected. The number of ground wires can be three or more.

(3) In the above embodiment, the case where the ground is provided at two locations has been described, but the present invention can be applied to the case where the ground is provided by branching at three or more locations.
In this case, all the stud bolts may be electrically connected by one composite terminal fitting, or all the studs may be connected by using a plurality of composite terminal fittings.

(4) In the above embodiment, the stud for the grounding terminal to which the terminal fitting is connected is the bolt screwed into the grounding panel. However, according to the present invention, the bolt is projected onto the grounding panel. Thus, the stud having the male screw formed thereon may be projected, and the terminal fitting may be fixed by fitting the terminal fitting therein and tightening it with a nut.

(5) In this embodiment, a means of crimping is used to connect the composite terminal fitting and the connection terminal fitting to the ground wire, but the connecting means is not limited to crimping, and other means such as pressure welding and welding are used. Means can be used.

[Brief description of drawings]

FIG. 1 is a perspective view of an assembled state of Example 1 of the invention.

FIG. 2 is a perspective view of a separated state.

FIG. 3 is a perspective view of a composite terminal fitting.

FIG. 4 is a perspective view of a separated state of the second embodiment.

FIG. 5 is a perspective view of an assembled state of the second embodiment.

FIG. 6 is a perspective view of a composite terminal fitting according to a third embodiment.

FIG. 7 is a perspective view of a fourth embodiment in a separated state.

FIG. 8 is a partially enlarged cross-sectional view showing a fitted state of the ground terminal portions of the fourth embodiment.

FIG. 9 is a perspective view of an assembled state of a conventional ground structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Composite terminal metal fitting 11 ... Grounding terminal part 17 ... Crossing conduction part 19 ... Electric wire connection part 20 ... Connection terminal metal fitting 30 ... Stud bolt W ... Ground electric wire

Claims (2)

[Claims] 1. A grounding wire for grounding an electric wire from a device side to a plurality of grounding studs provided at intervals, wherein a plurality of grounding terminal parts are fitted and fixed to the studs. And a composite terminal fitting integrally having a crossover conducting portion connecting these ground terminal parts, and a ground wire from the device side fitted and fixed to the stud in a state of being overlapped with each ground terminal part of the composite terminal fitting. A grounding structure that includes a connection terminal fitting to which is connected. 2. The ground structure according to claim 1, wherein a wire connection part to which a ground wire from the device side is connected is formed in the crossover conductive part of the composite terminal fitting.