JP3389978B2 - Ground terminal mounting structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for mounting a ground terminal connected to an electric wire on a body.

[0002]

2. Description of the Related Art In an automobile wire harness,
Grounding is performed by crimping a grounding terminal to the end of an electric wire for grounding and attaching this grounding terminal to a predetermined position of the body. By the way, in recent years, there has been a demand for recycling in automobiles, and among them, it is considered to reuse a metal body. In this case, if the parts made of materials other than metal are still attached to the body, it may interfere with the subsequent processing. Therefore, it is necessary to remove the resin-coated electric wire from the body.

[0003]

Among the electric wires constituting the wire harness, the electric wire for earthing is connected to the earthing terminal by crimping as described above, and therefore must be removed from the body together with the earthing terminal. I won't.
However, the conventional method of mounting the ground terminal is to screw the bolt through the through hole formed in the ground terminal into the body,
A means of sandwiching the ground terminal between the head of the bolt and the body was used. For this reason, when the electric wire is removed from the body, it is troublesome to remove the ground terminal by rotating the bolt, resulting in poor workability.

The present invention was created in view of the above circumstances, and it is an object of the present invention to make it possible to easily remove an electric wire whose ground terminal is still connected from a body.

[0005]

According to a first aspect of the present invention, there is provided a grounding terminal mounting structure for removably mounting a grounding terminal connected to an electric wire to a body for grounding.
The grounding terminal enables detachment of the electric wire fixing portion from the body fixing portion in a state where the electric wire fixing portion to which the electric wire is fixed, the body fixing portion to be fixed to the body, and the body is attached. And a ground- shaped easy-breakable portion that
Extends forward from the wire fixing part and constitutes the wire fixing part.
Has a wider extension than the bottom plate, and this extension is
With the breakable part as a boundary, it separates from the wire fixing part
Part and the body fixing part,
The end portion faces the rear edge of the extending portion, and the easily breakable portion
Fracture progresses forward from the rear edge of the extension.
While the detaching part and the wire fixing part are fixed to the body
The feature is that it is designed to be separated from the part . In the invention having such a configuration, when the electric wire is detached from the body, when the electric wire fixing portion is separated from the body fixing portion at the easily breakable portion, the body fixing portion is left in the body, and the electric wire fixing portion is separated from the body together with the electric wire. It

[0006]

According to a second aspect of the invention, in the first aspect of the invention, the body fixing portion is provided so as to surround the detaching portion.
It has a feature that is. In the invention having such a configuration, when the electric wire is detached from the body, when the electric wire fixing portion is separated from the body fixing portion at the easily breakable portion, the body fixing portion is left in the body, and the electric wire fixing portion is separated from the body together with the electric wire. It

According to a third aspect of the present invention, there is provided a grounding terminal mounting structure for detachably mounting a grounding terminal connected to an electric wire to a grounding body, wherein the electric wire is fixed to the outer peripheral edge of the grounding terminal. In addition, a bolt mounting hole is formed in the center to allow the bolt to penetrate, and a head that expands the diameter of the bolt is provided with a cutter that can cut the surface of the ground terminal as it rotates. It is attached by being pinched between the head and body of the bolt that penetrates the hole and is screwed to the body, and the earth terminal is formed with a ring-shaped easily breakable portion by the cutter along with the attachment. Where the wire is removed from the body, the part where the wire is fixed at the easily breakable part is separated from the part left on the body by bolts. Having the features. In the invention having such a structure, the easily breakable portion is formed in the step of attaching the ground terminal to the body.

[0009]

According to the inventions of claim 1 and claim 2 ,
By providing the easily breakable portion, the work of removing the electric wire can be easily performed.

[0010]

According to the third aspect of the present invention, since the step of forming the easily breakable portion is unnecessary, the manufacturing efficiency is excellent.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Reference Example 1 Reference Example 1 of the present invention will be described below with reference to FIG. Book
The ground terminal 10 of the reference example is formed by punching a plate material made of a conductive metal material into a predetermined shape and bending the plate material. An electric wire fixing portion 11 for connecting an electric wire (not shown in FIG. 1) is formed at the rear portion of the ground terminal 10. The electric wire fixing portion 11 is composed of a wire barrel 11F and an insulation barrel 11R formed by providing a pair of front and rear rising portions 13F and 13R from the left and right edges of the bottom plate portion 12, respectively.
The core wire exposed by peeling the resin coating of the electric wire is fixed to 1F by crimping, and the portion of the electric wire covered with the resin coating is fixed to the insulation barrel 11R by crimping.

A portion of the grounding terminal 10 in front of the electric wire fixing portion 11 is a body fixing portion 14 which is attached to a grounding body (not shown in FIG. 1). The body fixing portion 14 extends from the bottom plate portion 12 of the electric wire fixing portion 11 in a substantially flush and circular shape. The body fixing portion 14 has a bolt mounting hole 15 through which a male screw portion of a bolt (not shown in FIG. 1) can pass.

A breakable portion 16 is formed between the wire fixing portion 11 and the body fixing portion 14 of the earth terminal 10 by a groove linearly cut in the left and right direction (width direction) in a straight line. . The easily breakable portion 16 has a thickness that is different from that of the bottom plate portion 12 of the electric wire fixing portion 11 and the body fixing portion 1.
It is thinner than No. 4, and thus is weaker in strength than the wire fixing portion 11 and the body fixing portion 14.

Next, the operation of this reference example will be described. When attaching the electric wire to the body, the bolt mounting hole 15 is aligned with the female screw hole (not shown in FIG. 1) formed in the body, and the male screw portion of the bolt penetrating the bolt mounting hole 15 is screwed into the female screw hole. Tighten by screwing. As a result, the body fixing portion 14 is pinched between the head of the bolt and the surface of the body, so that the electric wire is grounded to the body via the grounding terminal 10.

When the electric wire is detached from the body, the electric wire fixing portion 11 is gripped and lifted up so as to be separated from the body while the ground terminal 10 is still attached to the body with the bolt. Then, the wire fixing portion 11 is bent around the thin and weakly easily breakable portion 16 as a fulcrum, and the wire fixing portion 11 is separated from the body fixing portion 14 with the easy breaking portion 16 as a boundary. As a result, the electric wire including the resin coating made of a material different from that of the metal body is removed from the body, and then the body is recycled.

As described above, according to this embodiment , the wire fixing portion 11 can be easily broken without removing the tightly tightened bolts when removing the wire.
Since it suffices to break the body fixing portion 14 in the above, the work of removing the electric wire can be easily performed.

Although the body fixing portion 14 and the bolt are left on the body after the electric wire and the electric wire fixing portion 11 are removed,
When the composition component of the bolt and the body fixing portion 14 is the same as or close to that of the body, the bolt and the body fixing portion 14 may be left in the body. In this case, it is not necessary to loosen the bolt and remove it from the body together with the body fixing portion 14, so that the work efficiency is improved.

Further, the wire fixing portion 11 is replaced with the body fixing portion 11
At the time of the work of separating from the electric wire fixing portion 11, in addition to the method of bending the electric wire fixing portion 11 using the easily breakable portion 16 as a fulcrum,
It is also possible to lift the right or left side of 1 upward to break the easily breakable portion 16.

Reference Example 2 Next, Reference Example 2 of the present invention will be described with reference to FIG. Book
Ground terminal 20 of the reference example is obtained by varying the structure of the frangible portion in the ground terminal 10 of the reference example 1.
Since the other configurations are the same as those of the reference example 1 , the same reference numerals are given to the same configurations, and the description of the structure, operation, and effect is omitted.

The easily breakable portion 26 of the ground terminal 20 of this reference example has a pair of notches 27, 27 formed on the left and right edges between the wire fixing portion 11 and the body fixing portion 14, and the width dimension thereof. Is locally thinned. The easily breakable portion 26 has a substantial size required to secure the strength in the width direction thereof, which is smaller by the amount of the pair of cutout portions. Therefore, the easily breakable portion 26 is stronger than the wire fixing portion 11 and the body fixing portion 14. Is getting weaker. The attachment and detachment of the ground terminal 20 to and from the body can be performed in the same manner as in the first reference example, and therefore the description and effect thereof will be omitted.

Reference Example 3 Next, a reference example 3 of the present invention will be described with reference to FIG. Book
Ground terminal 30 of the reference example is obtained by varying the structure of the frangible portion in the ground terminal 10 of the reference example 1.
Since the other configurations are the same as those of the reference example 1 , the same reference numerals are given to the same configurations, and the description of the structure, operation, and effect is omitted.

The easily breakable portion 36 of the ground terminal 30 of this embodiment is formed by forming two holes 37, 37 between the wire fixing portion 11 and the body fixing portion 14 side by side in the width direction. . Since the substantial size required to secure the strength in the width direction of the easily breakable portion 36 is reduced by the amount of the two holes, the easily breakable portion 36 is stronger than the wire fixing portion 11 and the body fixing portion 14. It's getting weaker. The attachment and detachment of the ground terminal 30 to and from the body can be performed in the same manner as in Reference Example 1 described above, and therefore the description and effect thereof will be omitted.

[0024] <Embodiment 1> Next, an embodiment 1 embodying the present invention with reference to FIGS. 4-8. The ground terminal 40 of this embodiment is formed by punching a plate material made of a conductive metal material into a predetermined shape and bending the plate material. An electric wire fixing portion 41 for connecting the electric wire W is formed on the rear portion of the ground terminal 40. The electric wire fixing portion 41 has a bottom plate portion 42.
The pair of front and rear rising portions 43F, 43 from the left and right edges of the
It is composed of a wire barrel 41F and an insulation barrel 41R formed by providing R, and the core wire Wb exposed toward the resin coating Wa of the electric wire W is fixed by crimping to the wire barrel 41F, and is attached to the insulation barrel 41R. The portion of the electric wire W covered with the resin coating Wa is fixed by crimping.

The ground terminal 40 has a wire fixing portion 41.
From the bottom plate portion 42 to the front substantially flush with the bottom plate portion 4
An extension portion 44 having a width on the left and right that is wider than that of the extension portion 2 is integrally provided. An easily breakable portion 46 is formed in the extension portion 44 by a groove formed by cutting the upper surface of the extension portion 44 in an elongated elliptical shape in the front-rear direction. The rear portion of the elliptical groove that constitutes the easily breakable portion 46 is interrupted at the left and right sides of the electric wire fixing portion 41 at the rear end edge of the extending portion 44. This allows
The extending portion 44 is divided into a detaching portion 47 which is integrated with the electric wire fixing portion 41 on the inner side of the easy breaking portion 46 as a boundary and a body fixing portion 48 which has a U shape as a whole on the outer side of the easy breaking portion 46. There is. A pair of bolt mounting portions 49, 49 are formed on both left and right edges of the body fixing portion 48, and a male screw portion 51 of the bolt 50 penetrates a mounting hole (not shown) formed in the bolt mounting portion 49. It is supposed to be done.

Further, a clamp (locking means which is a constituent feature of the present invention) 54 made of a resin material is fixed at a position rearward of the portion of the electric wire W which is crimped to the electric wire fixing portion 41 by means such as adhesion. Has been done. The clamp 54 protrudes below the electric wire W, and has a pair of elastic engagement pieces 55, 55.
Is equipped with. The elastic engagement piece 55 can be fitted into a retaining hole 59 formed in the body 58.

Next, the operation of this embodiment will be described. When mounting the ground terminal 40, the male screw portion 51 of the bolt 50 is passed through the mounting hole of the bolt mounting portion 49, and the bolt 50 is screwed into the female screw hole 57 formed in the body 58 and tightened. As a result, the ground terminal 40 is attached to the body 58 while being pressed by the head portion 53 of the bolt 50 (see FIGS. 4 and 7). Further, when the clamp 54 attached to the electric wire W is inserted into the retaining hole 59 of the body 58, the elastic engagement piece 5 of the clamp 54 is inserted.
5, 55 are caught on the back side of the hole edge of the retaining hole 59. As a result, the clamp 54 is fixed to the body 58 and the lifting of the electric wire W from the body 58 is regulated, so that the end portion of the electric wire W is attached to the body 58 together with the ground terminal 40.

When removing the ground terminal 40 from the body 58, first, the end portion of the electric wire W is picked, and the elastic engaging piece 5 is removed.
The electric wire W is pulled up with a force that resists the elasticity of 4.
Then, the elastic engagement piece 54 comes off the retaining hole 59, and the electric wire W floats up from the body 58. After that, when the electric wire W is further pulled up, the electric wire fixing portion 41 and the detaching portion 48 are integrated, and are separated from the body fixing portion 47 while breaking the easily breakable portion 46. At this time, the easily breakable portion 46
The fracture progresses from the rear end edge of the extending portion 44 toward the front. However, once the fracture is started, the fracture progresses even with a small force, which facilitates the operation.
Then, when the breakage of the easily breakable portion 46 reaches the front end thereof, the wire fixing portion 41 is separated from the body fixing portion 47.
As a result, the electric wire W including the resinous coating Wa made of a material different from the metal body 58 is removed from the body 58, and then the body 58 is recycled.

As described above, according to the present embodiment, when the electric wire W is removed, the electric wire W can be removed by only pulling up the electric wire fixing portion 41 without loosening the tightly tightened bolt 50. Since the electric wire W is removed from the body 58, the work of removing the electric wire W can be easily performed.

The electric wire W and the electric wire fixing portion 41 are attached to the body 58.
The bolt 50 and the body fixing portion 47 are left on the body 58 after the bolt 50 and the ground terminal 40 are removed from the body. The fixed portion 47 is attached to the body 58
You can leave it on. In this case, it is not necessary to remove the bolt 50 and the body fixing portion 47 from the body 58, so that the work efficiency is improved.

[0031] <Embodiment 2> Next, a second preferred embodiment of the present invention FIGS. 9 and 10
Will be described with reference to. The ground terminal 60 of this embodiment is
It is formed by punching a plate material made of a conductive metal material into a predetermined shape and bending it. An electric wire fixing portion 61 for connecting the electric wire W is formed on the rear portion of the ground terminal 60. The wire fixing portion 61 is the bottom plate portion 6.
The core wire Wb which is formed by providing the rising portions 63 from both left and right edges of the wire 2 and which is exposed toward the resin coating Wa of the electric wire W is fixed by crimping.

A portion of the ground terminal 60 on the front side of the electric wire fixing portion 61 is a body connecting portion 64 which is attached to the grounding body 70. The body connecting portion 64 extends substantially flush with the bottom plate portion 62 of the electric wire fixing portion 61. The body connecting portion 64 has a male screw portion 7 of a bolt 75.
A bolt mounting hole 65 through which 6 can pass is formed.

The bolt 75 comprises a male screw portion 76 and a hexagonal head portion 77 integrally provided on the upper end of the male screw portion 76, and the outer dimension of the head portion 77 is the outer diameter dimension of the male screw portion 76. Is bigger than On the lower surface of the head portion 77 of the bolt 75, a plurality of cutters 78 projecting downward from a plurality of positions on the outer peripheral edge thereof are provided. The cutter 78 is formed as a separate component from the bolt 75 by a high hardness material such as artificial diamond, and is attached to a mounting portion (not shown) formed on the lower surface of the head 77 with the blade facing downward. ing.

Next, the operation of this embodiment will be described. When attaching the electric wire W to the body 70, the body 7
The bolt mounting hole 65 is aligned with the female screw hole 71 formed in 0, and the bolt 75 is inserted through the bolt mounting hole 65.
The male screw portion 76 of is screwed into the female screw hole 71. As the screwing of the bolt 75 progresses, the cutter 7 on the lower surface of the head 77 is
8 comes into contact with the upper surface of the body connecting portion 64 of the ground terminal 60, and a groove is formed here in a circular shape concentric with the bolt 75, and the easily breakable portion 66 is formed by this groove.

When the groove of the easily breakable portion 66 is dug to a predetermined depth so that the lower surface of the head 77 comes into contact with the upper surface of the body connecting portion 64, the head 77 of the bolt 75 and the surface of the body 70 are separated from each other. The body connecting portion 64 is pinched between the two, and thus the electric wire W is grounded to the body 70 via the ground terminal 60.

When removing the electric wire W from the body 70,
With the ground terminal 60 still attached to the body 70 with the bolt 75, the wire fixing portion 61 is gripped and lifted up so as to be separated from the body 70. Then, the wire fixing portion 61 and the link-shaped portion on the outer peripheral side of the easy-breakable portion 66 are separated from the inner peripheral portion of the body while breaking the easy-breakable portion 66 that is thin and weak in strength. Will be withdrawn. As a result, the electric wire W including the resin coating Wb made of a material different from that of the metal body 70 is removed from the body 70, and then the body 7 is removed.
0 will be recycled.

As described above, according to the present embodiment, when the electric wire W is removed, it is sufficient to break the easily breakable portion 66 without loosening the bolt 75 that is tightly tightened. Can be easily removed.

Moreover, the easily breakable portion 66 required for detaching the electric wire W from the body 70 is formed by the ground terminal 60.
Since it is performed in the process of attaching the ground terminal 60 to the body 70, not in the manufacturing process of, the manufacturing process of the ground terminal can be reduced and the manufacturing cost can be kept low.

After the wire W and the wire fixing portion 61 are removed, the circular portion and the bolt 75 on the inner peripheral side of the easily breakable portion 66 of the earth terminal 60 are left in the body 70. When the composition component of the bolt 75 is the same as or close to that of the body 70, the circular portion on the inner peripheral side of the easily breakable portion 66 and the bolt 75 may be left in the body 70. In this case, the bolt 75 is loosened and the body 7 along with the circular portion on the inner peripheral side of the easily breakable portion 66 is loosened.
Since the work of removing from 0 is unnecessary, the work efficiency is improved.

<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) Reference Examples 1 to 3 and actual examples
Also in the second embodiment , the electric wire may be provided with a clamp as in the first embodiment .

(2) In the first embodiment , the clamp (locking means) may not be provided.

(3) When the easily breakable portion is formed on the ground terminal in advance, the shape of the easily breakable portion is not limited to the shape shown in the above embodiment, but may be another shape. It may be configured such that a plurality of breaks are provided.

[Brief description of drawings]

FIG. 1 is a perspective view of a ground terminal of Reference Example 1 .

FIG. 2 is a perspective view of a ground terminal of Reference Example 2 .

FIG. 3 is a perspective view of a ground terminal of Reference Example 3 .

FIG. 4 is a plan view of the ground terminal according to the first embodiment .

5 is a sectional view taken along line AA of FIG.

FIG. 6 is a plan view showing a state in which the wire fixing portion is separated from the body fixing portion in the first embodiment .

FIG. 7 is a cross-sectional view showing a state in which the ground terminal is attached to the body in the first embodiment .

FIG. 8 is a cross-sectional view showing a state in which the wire fixing portion is being detached in the first embodiment .

FIG. 9 is a sectional view showing a disassembled state in the second embodiment .

FIG. 10 is a sectional view showing a mounting state in the second embodiment .

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01R 4/64 H01R 11/11-11/12

Claims (3)

(57) [Claims] 1. A grounding terminal mounting structure for removably mounting a grounding terminal connected to an electric wire to a body for grounding, wherein the grounding terminal includes a wire fixing portion to which the electric wire is fixed, and the body. comprising a body fixing portion which is fixed, and a groove-shaped frangible portion which allows the disconnection of the wire clamping portion from the body fixing portion in a state attached to the body, the said grounding terminal, the front-rear direction From the long wire fixing part
From the bottom plate part that extends forward and constitutes the wire fixing part
Also has a wide extending portion, and the extending portion has the easily breakable portion as a boundary, and
It is divided into a detaching part integrated with the attachment part and the body fixing part.
Is, an end portion of the frangible section our facing the rear edge of the extending portion
The breakage of the easily breakable part from the rear end edge of the extension part to the front.
While moving forward, the detachment part and the wire fixing part
Note: The ground terminal mounting structure is characterized in that it is separated from the body fixing part . 2. The body fixing portion surrounds the detaching portion.
The mounting structure for the ground terminal according to claim 1, wherein the mounting structure is provided as follows . 3. A ground terminal connected to an electric wire is used for grounding.
Removing the ground terminal for detachable mounting on the body
An electric wire is fixed to the outer peripheral edge of the ground terminal.
Along with it, a bolt mounting hole is formed in the center to allow the bolt to penetrate.
And the enlarged head of the bolt is
A cutter that can cut the surface of the ground terminal is provided,
The ground terminal passes through the bolt mounting hole and
Of the head and the body of the bolt screwed together
It is attached by being pinched between the
The earth terminal is attached by the cutter along with its installation.
A ring-shaped easily breakable portion is formed from the body of the electric wire.
Of the electric wire is fixed at the easily breakable part.
Is the part left on the body by the bolt?
The configuration that is done by being separated from
Characteristic ground terminal mounting structure.