JP2000322940A - Water cut-off structure within electric wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut off water entering through gaps between inner conductors of an electric wire at an arbitrary position in the wiring route of the electric wire. SOLUTION: This structure is made up of an insulation displacement terminal 11 having a slot part 11c to accept a required portion of an electric wire W where water is to be cut off and splitting an outer cladding Wb of the electric wire W press fitted in the slot part 11c to expose inner conductors Wa, and a case body 12 for covering the insulation displacement terminal 11 and the required portion of the electric wire W where the outer cladding is split. A seal material is filled within the case body 12, and thus gaps between the inner conductors exposed by the slot part 11c in the insulation displacement terminal 11 are cut off by the seal material 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water stopping structure inside an electric wire, and more particularly to a water stopping structure at an arbitrary point in a wiring route of the electric wire.

[0002]

2. Description of the Related Art As an example, a ground terminal used in an engine room has a connecting portion for crimping a core wire of an electric wire at one end and a mounting portion having a bolt hole formed at the other end. It can be attached directly to the car body. But,
In the ground terminal having such a general structure, since the core wire remains exposed at the core wire crimping portion, when water adheres to the core wire portion, a wide range is formed in the resin sheath from the gap between the strands of each core wire due to the capillary phenomenon. There is a risk of flooding.

As a countermeasure against waterproofing between core wires, Japanese Patent Application Laid-Open No. H11-67287 describes a waterproof structure at a wire connecting portion of a ground terminal. FIG.
As shown in (A) and (B), this ground terminal 1 connects an electric wire connecting portion 1a for connecting an internal conductor Wa exposed from an end of the electric wire W and an earth portion 1c having a bolt hole 1b to each other. They are arranged in orthogonal directions. Then, the electric wire connection portion 1a is covered with the bottomed cap 2 together with the internal conductor Wa, the sealing material 3 is filled in the cap 2, and the exposed portion of the internal conductor Wa is completely surrounded by the sealing material 3, so that the internal Water is prevented from entering through gaps between the conductors Wa.

[0004]

However, the above-mentioned waterproof structure requires a specially shaped ground terminal, which increases the cost. Since the cap protrudes in the direction perpendicular to the ground terminal near the ground part, which is the mounting part, it becomes an obstacle when mounting the ground terminal, and there are problems such as the limited number of places where the ground structure is set .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has as its object to provide a water-stopping structure inside an electric wire which can perform a water-stopping treatment at an arbitrary position of the electric wire.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has a slot for receiving a required portion of an electric wire to be subjected to a water stopping process, and cuts an outer sheath of the electric wire press-fitted into the slot. It is composed of a pressure contact terminal for exposing the inner conductor, and a case body covering a required portion of the pressure contact terminal and the cut wire, and the inside of the case body is filled with a sealing material and is exposed by a slot of the pressure contact terminal. In addition, the present invention provides a water stopping structure inside the electric wire, wherein the gap between the internal conductors is stopped by a sealing material.

[0007] According to the above construction, the required portion of the electric wire to be water-stopped is press-fitted into the slot portion of the press-contact terminal so that the outer sheath can be peeled off and the inner conductor can be exposed. Penetrates directly into gaps between conductor lines. Therefore, the path of water that has entered the gap between the inner conductors by capillary action can be blocked at the portion where the outer skin has been peeled off.

The slot portion of the press contact terminal is formed by two superposed press contact blades, and the press contact blade has a handle portion bent at a deep portion of the slot portion so as to be separated from each other. It is preferable to configure so that the outer skin cut by the above is separated in the opposite direction by the above-mentioned handling portion.

Thus, when a required portion of the electric wire to be water-stopped is press-fitted into the slot of the press contact terminal, the outer sheath of the electric wire is automatically separated in the opposite direction by the above-mentioned handle portion, so that the sealing material is formed inside the case body. The exposed portion of the inner conductor to be penetrated can be made large. Therefore, it is possible to further improve the water stopping effect due to the penetration of the sealing material into the gap between the wires of the internal conductor.

Further, the case body comprises a lower case for receiving the press-contact terminal and a required portion of the electric wire to be water-stopped, and a lid for covering an upper opening of the lower case, and the lid includes a lid for the lower case. It is preferable to form a projection for pressing both sides of the electric wire press-fitted into the slot at the time of mounting, and to form an injection port for the sealing material into the lower case.

More specifically, the press contact terminal is previously arranged in the lower case, and a holding portion for holding the electric wire to be subjected to the water stopping process at a position above the slot portion of the press contact terminal is formed on the side wall of the lower case. are doing. With this configuration, the electric wire is held by the lower case in which the press-contact terminals are arranged, and the cover is put on the lower case and pressed. To expose the inner conductor to be stopped, and at the same time, can be covered with the lid. Furthermore, by injecting the sealing material from the injection port of the lid, the sealing material can penetrate into the gaps between the internal conductors exposed in the case body, so that water can be stopped between lines. Therefore, the workability of the inter-line water stopping operation of the internal conductor at an arbitrary position of the electric wire can be improved.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 5 show a first embodiment of a water stopping structure inside an electric wire. In this water stopping structure, an inner conductor Wb is cut by press-fitting an electric wire W to be stopped to cut off an outer cover Wb.
The pressure contact terminal 11 exposes a, a case body 12 covering the pressure contact terminal 11, and a sealing material 15 filled in the case body 12.

The press contact terminal 11 is, as shown in FIG.
The two press-contact blades 11b vertically rising from the substrate 11a are formed by bending both ends of the substrate 11a made of a metal plate into a rising shape and overlapping the leading ends. And, in the center of the press contact blade 11b, a slot portion 11c of a predetermined width for cutting in the vertical direction and cutting the outer skin Wb of the electric wire W to expose the inner conductor Wa is formed. The portion that transitions from the lower end of the pressure contact blade 11b to both ends of the substrate 11a is a handle 11d that is bent in a tapered shape in a direction away from the substrate 11a, and the deep portion of the slot 11c extends to the handle 11d. Continue to form. The handle 11d is a region for separating the outer skin Wb cut by the slot 11c in the opposite direction as described later. In addition, the press-contact blade 11b that has been polymerized
The upper end portion is formed with a sharp blade edge portion 11e by hitting or the like so that the outer skin Wb is easily torn.

The case body 12 is made of resin.
As shown in FIG. 1, the lower case 13 is configured to receive a required portion of the insulation displacement terminal 11 and the electric wire W to be water-stopped and to be filled with the sealing material 15, and the lid 14 covers the upper opening of the lower case 13. A concave portion 13a for fitting and positioning the press contact terminal 11 is formed on the bottom of the lower case 13, and a holding portion 13b for inserting and holding the electric wire W is formed on both side walls. The cover 14 is fitted over the upper part of the lower case 13 to prevent the electric wire W inserted into the holding portion 13b from coming off, and to act to clamp the press contact terminal 11 with the lower case 13. Further, while a lock claw 13c is protrudingly provided on the peripheral surface of the lower case 13,
The cover 14 is formed with a lock hole 14a which engages with the lock claw 13c at the time of external fitting, so that the cover 14 is locked when fitted externally.

Next, the process of assembling the waterproof structure inside the electric wire having the above structure will be described. First, as shown in FIG. Press-fit a required position of the electric wire W to be stopped.
Then, as shown in FIG. 3B, the outer sheath Wb of the electric wire W is cut off to expose the inner conductor Wa. Further, as shown in FIG. 3 (C), when the electric wire W is pushed to the handle 11d, the outer cover Wb is pushed in the opposite direction along the tapered surface of the handle 11d, so that the area of the exposed portion of the inner conductor Wa is reduced. , Resulting in a wider state. When using the thick electric wire W, when the electric wire W is press-fitted into the press contact terminal 11, the outer conductor Wb of the electric wire W is previously cut so that the inner conductor Wa is exposed smoothly. Can be.

Then, as shown in FIG. 4, the press contact terminal 11 into which the electric wire W is press-fitted is arranged in the lower case 13, and the sealing material 15 having fluidity is filled, so that the sealing material 15 is exposed. It penetrates into the gap between the lines of the internal conductor Wa. Further, the lid 14 is fitted on the lower case 14 and fixed with the lock claws 13c and the lock holes 14a. Thereby, water that enters the gap between the internal conductors Wa due to the capillary phenomenon can be stopped at this portion. According to such a water stopping structure, it is possible to freely perform a water stopping process on an arbitrary position of the electric wire W that needs the water stopping between lines.

6 and 7 show a second embodiment. In this embodiment, the inner conductor Wa is exposed by pressing the electric wire W into the press contact terminal 11 at the same time as the assembly of the case body 22, and after the assembly. The seal member 25 can be injected into the case body 22 of FIG. That is, as shown in FIG. 6, the press contact terminal 11 similar to that of the first embodiment is previously fitted and disposed in the concave portion 23 a at the center of the bottom of the lower case 23, and the slot portion 11 c of the press contact terminal 11 is provided on both side walls. A holding portion 23b for arranging the electric wire W is formed at the upper facing position. On the other hand, at the center of the inner surface of the lid 24 externally fitted to the lower case 23, a pair of pressing projections 2 facing both sides of the press contact blade 11b and reaching the handle 11d when externally fitting to the lower case 23.
4b are projected in parallel.

A sealing material 25 to be filled is provided at a position between the pair of pressing projections 24b at the center of the lid 24.
Is provided. Lower case 23 and lid 2
4 and the lock claw 23 as in the first embodiment.
c and the lock hole 24a. The lower case 23 forms a bulging portion 23d for holding the electric wire W in a bent shape between the lower case 23 and the pressing protrusion 24b in a state where the lid 24 is fitted to the outer surface and against the tension.

Next, a description will be given of an assembling process in the water blocking structure inside the electric wire according to the second embodiment. First, as shown in FIG. 7A, holding on both sides of the lower case 23 in which the press contact terminals 11 are arranged in advance. The electric wire W to be stopped is inserted and held in the portion 23b. Subsequently, as shown in FIG. 7 (B), when the lid 24 is externally fitted to the lower case 23 and pressed strongly downward at the same time, the central portion of the held electric wire W is pressed.
b is pushed into the slot 11c of the press contact terminal 11. As a result, the outer skin Wb is cut off, and at the same time, the outer skin Wb is separated in the opposite direction by the handle 11d, so that the inner conductor Wa is exposed. Next, as shown in FIG.
When the sealing material 25 is injected from the inlet 24c, the sealing material 25 is filled into the lower case 23 through the space between the pressing protrusions 24b, and penetrates into the gaps between the exposed inner conductors Wa to stop water.

In the above embodiments, the case where only one electric wire W is to be processed is shown. However, it is also possible to simultaneously process a plurality of electric wires W. In this case, a plurality of slot portions are provided in parallel. It is possible to cope by forming a plurality of wire holding portions in the case body by using the press contact terminals. Further, in each of the above-described embodiments, a general electric wire is shown as the electric wire W to be subjected to the water stopping process, but the electric wire W may be used as a wire for stopping water between shield conductors in a shielded electric wire. In particular, as an effective use point of the present invention, if the above-mentioned water stopping structure is provided in the path of the electric wire connected to the ground terminal bolted to the vehicle body in the engine room, it is possible to prevent water from infiltrating into the vehicle due to the capillary phenomenon. . In this case, there is no need to use a special structure as the ground terminal. Further, in a wire harness for an automatic transmission or the like, it can be effectively used as a means for preventing oil from entering between lines even at a use location where an electric wire is immersed in oil.

[0021]

As is clear from the above description, according to the water blocking structure inside the electric wire according to the present invention, the inter-water stopping process of the inner conductor of the electric wire is performed at an arbitrary position in the route of the electric wire. It can be done easily.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a first embodiment of a water blocking structure inside an electric wire according to the present invention.

FIG. 2 is a perspective view of a press contact terminal.

3 (A) to 3 (C) are views showing an assembling process of a water blocking structure inside the electric wire according to the first embodiment.

FIG. 4 is a cross-sectional view showing a step of filling a sealing material into a case body in the first embodiment.

FIG. 5 is a perspective view after filling a sealing material in the first embodiment.

FIG. 6 is an exploded perspective view of a water blocking structure inside an electric wire according to a second embodiment.

FIGS. 7A to 7C are views showing an assembly process of a water blocking structure inside an electric wire according to a second embodiment.

8A and 8B are diagrams showing a conventional example.

[Explanation of symbols]

 W Electric wire Wa Inner conductor Wb Outer skin 11 Pressure contact terminal 11b Pressure contact blade 11c Slot portion 11d Handle portion 12, 22 Case body 13 Lower case 14, 24 Lid body 24b Press projection 24c Injection 15, 25 Sealing material

Claims (3)

[Claims] 1. A press contact terminal having a slot portion for receiving a required portion of an electric wire to be subjected to a water stopping process, cutting a sheath of the electric wire press-fitted into the slot portion to expose an inner conductor, a press contact terminal and the cut terminal. A sealing member is filled in the inside of the case body, and the gap between the internal conductors exposed by the slots of the press-connecting terminal is stopped by the sealing material. Waterproof structure inside the electric wire, characterized in that: 2. A slot portion of the press contact terminal is formed by two superposed press contact blades, and the press contact blade has a handle portion bent at a deep portion of the slot portion so as to be separated from each other. The water stopping structure inside the electric wire according to claim 1, wherein the outer skin cut off in (1) is separated in the opposite direction by the handle. 3. The case body comprises a lower case for receiving the press-contact terminal and a required portion of an electric wire to be water-stopped, and a lid for covering an upper surface opening of the lower case, and the lid includes a lid for the lower case. 3. An injection port for a sealing material into a lower case, wherein a pressing projection for pressing both sides of an electric wire press-fitted into the slot portion at the time of mounting is protrudingly formed. Water stop structure inside the electric wire.