JP2593821Y2 - Protective material for wire connection - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection member for an electric wire connection portion provided so as to cover a joint terminal to which a conductor is connected.

[0002]

2. Description of the Related Art Waterproofing is required for connection portions of electric wires used for wiring of automobiles and the like. Waterproofing is generally performed by a method in which a waterproof sheet is placed around joint terminals to which conductors are connected and fixed by bonding or welding. The waterproof sheet in this case is usually made of butyl rubber and PV.
It consists of a C sheet (see JP-A-2-212125).

[0005] In actuality, in order to sufficiently bring out the performance of the waterproof sheet, before winding the waterproof sheet, FIG.
As shown in (b), the joint terminal 1 has a thickness of 1.8 mm.
About 6 times of PVC tape 2 is wound around 6 times,
As shown in FIG. 5B, the joint terminal 1 is covered with a PVC tube 3 having a thickness of about 1 mm, and a waterproof sheet 4 is placed thereon to obtain an electric wire connection portion as shown in FIG. . This is to prevent the frayed conductor P from making a hole in the waterproof sheet 4 and the joint terminal 1 from breaking the waterproof sheet 4 when an external force F is applied as shown in FIG.

[0004]

However, when these methods are implemented, some problems occur. For example, in the tape winding method shown in FIG. 5, it is troublesome to take the tape around six turns and it takes too much time. Further, in the tube winding method shown in FIG. 6, a gap is formed between the tube 3 and the terminal 1 so that the sealing property is easily deteriorated. Would.

In view of the above circumstances, the present invention considers the above-mentioned circumstances and aims to improve the workability of waterproofing the electric wire connection portion, improve the sealing performance of the connection portion, and prevent the connection portion from being enlarged. The purpose is to provide protective material.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a protective member for an electric wire connecting portion provided to cover a joint terminal to which a conductor is connected. It is formed in a U-shaped cross section having an insertion opening, and is formed so as to have a concave portion on the inner surface, and the concave portion has a width L ₁ , a height L ₂ , a curvature R _{1 of} a ceiling portion, and a length equal to the joint. The width L ₁ ′ of the outer surface of the terminal,
The joint terminal is characterized by being formed to have substantially the same shape as the outer surface of the joint terminal so as to be slightly larger than the height L ₂ ′, the ceiling curvature R ₁ ′, and the length.

[0007]

When the joint terminal is covered with the protective material having the above structure, the insertion opening provided on one side is widened, and the joint terminal to which the electric wire is connected is inserted from here. Then, the protection member fits tightly on the outer periphery of the joint terminal with almost no gap due to its own elasticity.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory view of a first embodiment of the present invention. FIG. 1 (a) shows a protective member 5 of the embodiment, and FIG. 1 (b) shows a joint terminal of a metallic electric conductor to be covered with the protective member 5. 1 is shown. The protective material 5 of this embodiment is a substitute for a conventional tape or tube, is formed into a substantially U-shaped cross section having a joint terminal insertion opening 6 on one side, and has an outer surface of the joint terminal 1 on the entire inner surface. A recess having a shape matching the shape is formed.

That is, the width L ₁ , the height L ₂ , and the curvature R _{1 of the} ceiling of the inner surface of the protective member 5 shown in (a) and the width L ₁ ′, the height of the outer surface of the joint terminal 1 shown in (b). When L ₂ ′ and ceiling curvature R ₁ ′ are compared, the former dimension is set to be slightly larger, and when the protective material 5 is fitted to the joint terminal 1, the protective material 5 is attached to the joint terminal 1. It is shaped and shaped to fit almost.

The protective member 5 is formed to have a length that covers the joint terminal 1 and has the same cross section in the longitudinal direction. The protective material 5 is made of a rubber material such as EPDM, which is harder to deform than vinyl chloride or the like, has excellent elasticity, and is strong against metal force, and has a thickness of about 1 m.
At about m, R is provided at a corner portion so as to be as small as possible.

As shown in FIG. 1C, an adhesive or a hot melt 7 is applied to the inside of the protective material 5. This is to bring the protective material 5 and the joint terminal 1 into close contact,
This is to prevent the protective member 5 from coming off during the operation.

Next, a procedure for waterproofing the electric wire connection portion using the protective material 5 will be described with reference to FIG.

First, as shown in FIG. 2A, the insertion opening 6 provided on one side is widened, and the joint terminal 1 to which the electric wire is connected is inserted from here, and is inserted into the recess of the protective material 5 (b). Like Next, in the case of hot-melt coating as shown in (c), the hot-melt is melted by a drier 8 and the protective material 5 is brought into close contact with the outer periphery of the joint terminal 1. In the case of using an adhesive, the step (c) is omitted. Thereafter, as shown in (d), the wire connection portion is covered with a waterproof sheet (protection sheet) 4 including the protection material 5, and the connection portion is molded with the protection sheet 4 by means such as press bonding or ultrasonic welding. An electric wire connection portion 10 having a waterproof function as shown in e) is obtained.

In this case, the work for mounting the protective material 5 is simple because the insertion opening 6 is widened and the joint terminal 1 is inserted from here. In addition, since the protective material 5 is in close contact with the joint terminal 1, the sealing performance is improved, and the completed wire connection portion does not become large.

Next, a second embodiment of the present invention will be described.

In the above-described first embodiment, the protection member 5 which simply replaces the tape or the tube is shown. However, the protection member 15 of the second embodiment has the function of the conventional protection sheet 4 together. This protective material 15 is a joint terminal 1
And, it is formed in a size that sufficiently covers the connection wires on both sides thereof.

FIG. 3 shows the external appearance of the protective member 15, and FIG. 4 shows the inner surfaces of the upper plate 15A and the lower plate 15B except for the connecting portion 19 of the protective member 15. The protection member 15 is formed of an elastic material, and has a substantially U-shaped cross section having an electric wire insertion opening 16 on one side. The protection member 15 includes an upper plate portion 15A and a lower plate portion 15B facing each other, concave portions 17A and 17B having a shape corresponding to the outer surface shape of the joint terminal 1 on each inner surface, and an electric wire drawer into which the connection electric wire is fitted. Grooves 18A and 18B are formed respectively.

When this protective material 15 is used, the electric wire insertion opening 16 is widened, the electric wire and the joint terminal are inserted from here, and the electric wire and the joint terminal are accommodated in the wire drawing grooves 18A and 18B and the concave portions 17A and 17B, respectively. .
Then, while being compressed in this state, the joint terminal and the exposed conductors on both sides thereof are integrally molded by bonding or ultrasonic welding.

In the case of the protective member 15, as in the case of the protective member of the first embodiment, the mounting work is not required, and the sealing property can be improved and the enlargement can be prevented. Further, a protective sheet is not required, and workability is further improved.

[0021]

[Effects of the Invention] As described above, the protective material of the present invention is such that the opening provided on one side is widened, and the joint terminal to which the electric wire is connected is simply inserted from here, and the outer periphery of the joint terminal is tightly fitted without any gap. Since it fits, troublesome work such as tape winding can be omitted. Further, since almost no gap is formed between the protective member and the joint terminal, high sealing performance can be ensured. Further, since the wire connection does not swell once it is mounted, there is no possibility that the wire connection portion will be enlarged.

[Brief description of the drawings]

FIGS. 1A and 1B are explanatory views of a first embodiment of the present invention, wherein FIG. 1A is an external view of a protective material of the embodiment, FIG. 1B is an external view of a joint terminal to be covered with the protective material, and FIG. FIG. 2 is a side view of the protective member of the embodiment.

FIG. 2 is an explanatory diagram of a process in a case where a waterproofing process is performed on an electric wire connection portion using the protective material of the first embodiment.

FIG. 3 is an external view of a protective member according to a second embodiment of the present invention.

FIGS. 4A and 4B are diagrams showing an inner surface shape of the protection member of the second embodiment, wherein FIG. 4A is a diagram showing an inner surface of an upper plate portion, and FIG. 4B is a diagram showing an inner surface of a lower plate portion.

FIG. 5 is a process chart showing a procedure of an example of a conventional waterproofing treatment of an electric wire connection portion.

FIG. 6 is a process diagram showing a procedure of another example of a conventional waterproofing process of an electric wire connection portion.

FIG. 7 is an explanatory view of a conventional electric wire connection portion with respect to an external force.

[Explanation of symbols]

 1 Joint terminal 5, 15 Protective material

Claims (1)

(57) [Scope of request for utility model registration] 1. A protective material for an electric wire connection portion provided to cover a joint terminal to which a conductor is connected, wherein the inner surface is formed of an elastic material into a U-shaped cross section having the joint terminal insertion opening on one side. Is formed so as to have a concave portion, and the concave portion has a width L ₁ , a height L ₂ , a curvature R _{1 of the} ceiling portion, and a length L ₁ ′, a height L ₂ ′ of the outer surface of the joint terminal. A protective material for an electric wire connection part, which is formed in substantially the same shape that matches the outer surface shape of the joint terminal so as to be slightly larger than the curvature R ₁ ′ and the length of the ceiling part.