JPH0591995U - Waterproof structure of the ground terminal - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a waterproof structure of a ground terminal which can effectively realize complete waterproofing of the ground terminal even when water is easily splashed. [Structure] A cover body 5 having a housing portion 5b for the ground terminal 1, and a terminal cover 6 which is closed to the cover body 5.
And a seal piece 8 attached to the mating surface 5a of the cover body 5.
And a waterproof plug 3 attached to the connecting portion of the ground terminal 1 and the electric wire 2. The ground terminal 1 is housed in the housing portion 5b and the cover main body 5 and the terminal cover 6 are closed to close the ground terminal 1. The container 5b is sealed. Also, the seal piece 8
Of the cover body 5 by pulling part of the
Attach to the outer surface of.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a waterproof structure for a ground terminal, which is suitable for grounding an automobile or the like, especially when water is easily splashed.

[0002]

[Prior Art]

 Conventionally, when installing a ground terminal in a place where water is easily splashed in an automobile or the like, a wire protection cap or the like is used to protect the ground terminal and the exposed conductor portion of the wire connected to the ground terminal from direct hitting of water. 7 and 8 show an example of a conventional mounting structure of this type of ground terminal installed inside the hood of a passenger car. In the figure, the ground terminal 21 is fixed in place on the fender panel 24 by a ground bolt 22 and a ground nut 23. The earth terminal 21 is connected to the electric wire 25, and the whole of them is covered by the terminal cover 26. Thus, the earth terminal 21 is attached using the electric wire protection cap. In the figure, 27 is an engine hood, and a slight gap G is formed between the engine hood and the fender panel 24.

Here, when attaching the ground terminal 21, first, as shown in FIG. 9, the exposed conductor portion 25 a at one end of the electric wire 25 is crimped to the crimp portion 21 a of the earth terminal 21. Next, the ground terminal 21 to which the electric wire 25 is connected is set on the terminal cover 26 as shown in FIG. 10, and the one end of the electric wire 25 is fixed by the fixing piece 26a of the terminal cover 26. The ground bolt 22 is inserted into the hole 21b of the ground terminal 21, and is further fastened to the ground nut 23 on the back side thereof through the ground hole 24a of the fender panel 24 as shown in FIG. Is bent through the hinge portion 26b as shown in the figure. After fastening the earth bolt 22 and the earth nut 23, the bent terminal cover 26 as shown in FIG. 12 is closed to the fender panel 24 side, whereby the attachment of the earth terminal 21 is completed.

[0004]

[Problems to be solved by the device]

 However, in the above-described conventional structure for mounting the ground terminal 21 using the terminal cover 26, although it is possible to prevent water from directly hitting the ground terminal 21, etc., complete waterproofing cannot be achieved. That is, since the terminal cover 26 is fixed to the electric wire 25, a gap is created between the terminal cover 26 and the fender panel 24 in this example, as shown in FIG. In addition, there was a problem that the water W would permeate around the ground terminal 21. Further, the water W also intrudes through the gap around the hinge portion 26b of the terminal cover 26 itself. In particular, in the case of car wash or rain, there is a problem of water W intrusion, but as a result, rust of the ground terminal 21 and the exposed conductor portion 25a of the electric wire 25 is induced, and further, contact failure or disconnection accident in extreme cases occurs. It could have evolved to.

Further, the water W adhering to the exposed conductor portion 25a of the electric wire 25 permeates into the electric wire 25 due to the capillary phenomenon, and as shown in FIGS. 13 and 14, the connector 28 which is the connection destination of the electric wire 25. To reach. In particular, when the connector 28 is a hermetically-sealed waterproof type, water W accumulates in the connector 28, which causes the terminals arranged therein to be submerged or causes leakage between terminals. As a result, there were problems such as malfunction of the connected electric circuit.

In view of the above situation, it is an object of the present invention to provide a waterproof structure for a grounding terminal, which can effectively realize complete waterproofing of the grounding terminal even when water is easily splashed.

[0007]

[Means for Solving the Problems]

 The waterproof structure of the ground terminal according to the present invention comprises a cover body having a housing portion for the ground terminal, a terminal cover that is closed to the cover body, a seal piece that is attached to the mating surface of the cover body, and the ground terminal. And a waterproof plug attached to the connecting part of the electric wire, and the ground terminal is sealed in the housing by housing the ground terminal in the housing and closing the cover body and the terminal cover. It is a thing.

Further, in the waterproof structure of the grounding terminal of the present invention, a part of the seal piece is drawn to the outside of the cover body and attached to the outer surface of the cover body.

[0009]

[Action]

 According to the present invention, the earth terminal is sealed in the accommodation portion of the cover body by interposing the seal piece between the cover body accommodating the earth terminal and the terminal cover so as to sandwich the earth terminal. .. In addition, by covering the connection part of the ground terminal and the electric wire with a waterproof plug, it is possible to prevent water from entering the connection part, and by doing so, ensure complete waterproofing of the ground terminal and its connection part. You can

Further, according to the present invention, in particular, by drawing a part of the sealing piece to the outside of the cover main body, water enters into the cover main body from between the ground terminal and its attachment destination. Can be prevented.

[0011]

【Example】

 An embodiment of a waterproof structure for a ground terminal according to the present invention will be described below with reference to FIGS. 1 and 2 show the overall structure of the waterproof structure of the earth terminal of the present invention. In the figure, 1 is a ground terminal in which an insertion hole 1a for a ground bolt, which will be described later, is formed, 2 is an electric wire connected to the ground terminal 1, and 3 is a connecting portion between the ground terminal 1 and the electric wire 2. It is a waterproof plug to wear. The waterproof plug 3 is made of rubber, and as shown in FIG. 3, after the exposed conductor portion 2a of the electric wire 2 inserted into the insertion hole 3a is crimped to the crimped portion 1b of the ground terminal 1, the connecting portion thereof is covered. Be worn.

Further, 4 is a cover composed of a cover main body 5 and a terminal cover 6, which are integrally molded using a synthetic resin material or the like. The cover main body 5 and the terminal cover 6 have their mating surfaces through a hinge portion 4a. It can be closed at 5a and 6a. Here, as shown in FIG. 4, the cover body 5 has an accommodating portion 5b for the ground terminal 1, and an insertion hole 5c for the earth bolt 7 is provided at the center of the accommodating portion 5b. Has been formed. Further, the cover body 5 and the terminal cover 6 are provided with recesses 5d and 6b for accommodating and sandwiching the waterproof plug 3. The cover body 5 has the locking projections 5e, and the terminal cover 6 has the locking pieces 6c. When the cover body 5 and the terminal cover 6 are closed, the locking projections 5e and the locking pieces 6c are formed. Are engaged.

Reference numeral 8 denotes a seal piece attached to the mating surface 5 a of the cover body 5. A part of the seal piece 8 is drawn to the outside of the cover body 5 and attached to the outer surface of the back side of the cover body 5. ing. The seal piece 8 is made of polyurethane foam or the like, and is formed so as to match the mating surface 5a of the cover body 5 as shown in FIG. 4, and also has a window 8a for escape of the ground bolt 7 and a waterproof plug. It has three notches 8b for escape. Further, an insertion hole 8c for the ground bolt 7 is formed in a portion to be routed outside the cover body 5. Further, the sticking of the seal piece 8 and the mating surface 5a of the cover body 5 is performed by the double-sided tape 9.

In the above case, the earth terminal 1 is fixed to the fender panel 11 by fastening the earth bolt 7 and the earth nut 10.

The waterproof structure of the grounding terminal of the present invention is constructed as described above, and its operation will be described below. When the ground terminal 1 is attached to the fender panel 11 or the like, the ground terminal 1 in which the waterproof plug 3 is attached to the connecting portion with the electric wire 2 is housed in the housing portion 5b of the cover body 5, and the waterproof plug 3 is covered. It is accommodated in the recess 5d of the main body 5. Next, the seal piece 8 is attached to the mating surface 5a of the cover body 5, and the earth terminal 1 is once incorporated in the cover body 5 in this way. Then, a part of the attached seal piece 8 is drawn to the outer surface of the back side of the cover body 5 and attached there.

Further, the earth bolt 7 is inserted into the insertion hole 5c of the cover body 5, and the earth terminal 7 and the cover body 5 are simultaneously tightened and fixed to the fender panel 11 by the earth bolt 7. Then, by closing the terminal cover 6 to the cover body 5 via the hinge portion 4a of the cover 4, the locking projections 5e and the locking pieces 6c are engaged with each other, and the installation of the ground terminal 1 is completed (FIG. 5). reference).

As described above, after the cover body 5 is securely fixed to the fender panel 11 side, the terminal cover 6 is closed to the cover body 5, so that the cover 4 can be fixed easily and securely, and the work can be performed. Good nature. Incidentally, the terminal cover 26 is conventionally fixed to the electric wire 25 and is not fixed to the fender panel 24 to which the terminal cover 26 is attached (see FIG. 8). Therefore, while pressing a part of the terminal cover 26, The terminal cover 26 had to be closed via the hinge portion 26b. In the waterproof structure of the earth terminal of the present invention, since the cover body 5 is already fixed when the terminal cover 6 is closed as described above, it is possible to eliminate the troublesome work of holding the cover body 5 and the like.

The ground terminal 1 attached to the side of the fender panel 11 is sealed by a sealing piece 8 around the ground terminal 1, and a waterproof plug 3 is provided at a portion where the electric wire 2 is taken out from the cover 4, so that the ground terminal 1 is grounded. The terminal 1 is hermetically sealed in the cover 4 to prevent water from entering from the outside. Further, as shown in FIG. 6, a part of the seal piece 8 is drawn to the outer surface of the back side of the cover body and is attached thereto, so that the gap between the ground terminal 1 and the fender panel 11 to which it is attached is made. It is possible to prevent the transmitted water W from entering. By completely waterproofing the ground terminal 1 and its connecting portion in this manner, it is possible to prevent the water W from adhering to the ground terminal 1 itself and the conductor portion of the electric wire 2.

[0019]

[Effect of the device]

 As described above, according to the present invention, it is possible to prevent water from entering from the caulking portion of the ground terminal, etc., and it is possible to obtain a complete waterproof effect with a relatively simple structure. Moreover, due to such a waterproof effect, the earth terminal itself is prevented from rusting, and there is no fear of contact failure. Since the ground terminal is sandwiched between the cover body and the seal piece, it is possible to install the product as a so-called built-in product, which improves workability and improves the workability of the ground terminal. Since the cover is tightened at the same time, the cover can be securely fixed, which also has the advantage of excellent workability.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overall configuration of an embodiment of a waterproof structure of a ground terminal according to the present invention.

FIG. 2 is a side cross-sectional view showing a ground terminal mounting state according to the waterproof structure of the ground terminal of the present invention.

FIG. 3 is an exploded perspective view illustrating a process of assembling the ground terminal and the electric wire.

FIG. 4 is an exploded perspective view illustrating an assembling process of the ground terminal and the cover.

FIG. 5 is a perspective view showing a mounting state of the ground terminal.

FIG. 6 is a rear side perspective view showing a mounting state of the ground terminal.

FIG. 7 is a partial perspective view of a vehicle to which a conventional ground terminal should be attached.

FIG. 8: AA of FIG. 7 showing a conventional ground terminal attachment state
It is sectional drawing which follows the line.

FIG. 9 is an exploded perspective view illustrating a conventional process of assembling a ground terminal and an electric wire.

FIG. 10 is an exploded perspective view illustrating a conventional process of assembling a ground terminal and a terminal cover.

FIG. 11 is a perspective view illustrating a conventional process of attaching a ground terminal to a vehicle.

FIG. 12 is a perspective view showing a conventional ground terminal attachment state.

FIG. 13 is a perspective view showing a connection configuration example of a conventional connector for connecting to a ground terminal.

14 is an enlarged perspective view of a B part in FIG.

[Explanation of symbols]

 1 ground terminal 1a ground terminal insertion hole 2 electric wire 3 waterproof plug 4 cover 5 cover body 5a mating surface 5b accommodating portion 5d recess 5e locking protrusion 6 terminal cover 6a mating surface 6b recess 6c locking piece 7 ground bolt 8 sealing piece 8a Window 8b Notch 9 Double-sided tape 10 Ground nut 11 Fender panel

Claims (2)

[Scope of utility model registration request] 1. A cover main body having a housing portion for the ground terminal, a terminal cover closed to the cover main body, a seal piece attached to a mating surface of the cover main body, and a connecting portion between the ground terminal and the electric wire. A waterproof structure for a ground terminal, wherein the ground terminal is sealed in the housing by housing the ground terminal in the housing and closing the cover body and the terminal cover. . 2. The waterproofing of the earth terminal according to claim 1, wherein a part of the seal piece is drawn to the outside of the cover body and attached to the outer surface of the cover body. Construction.