JP2593163Y2 - Waterproof structure of wire connection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a waterproof structure of an electric wire connecting portion for directly connecting ends of a wire such as a wire harness where a coating is removed.

"Conventional technology" In a wire harness or the like, the waterproof measure of an electric wire connection part (hereinafter, simply referred to as a connection part) for peeling a coating and connecting an electric wire is the simplest method when the connection part is wrapped with a waterproof tape. Since there is a possibility that the tape may be flooded from the adhesive surfaces of the wound tapes due to a capillary phenomenon or the like, the following four types of waterproof means are used as the waterproof means for the connection portion.

A: Japanese Unexamined Patent Publication No. 64-6307 states that "The connection portion is wrapped in a mold, and rubber and plastics which are heated and melted are pressed into the mold, cooled and solidified to mold an insulator, and the insulation is formed. Means of embedding the connection part in the body and waterproofing it.B: `` Wrap the connection part with butyl rubber and wrap it with tape from above, as shown in JP-B-59-35510, or Means of pressurizing with a press machine, sandwiching it with rubber, and wrapping the tape with water and waterproofing it.C: As shown in Japanese Utility Model Publication No. 62-123072, Means of waterproofing by using the shrinkage of the tube ", D: The joint shown in Japanese Utility Model Application Laid-Open No. 61-62376 is covered with a mating-type insulating cover, the seam is adhered, and the outer periphery is band-tightened. There is a way to “waterproof”.

"Problems to be Solved by the Invention" The above-mentioned conventional means have an appropriate waterproofing action, but each has the following disadvantages. That is, the above-mentioned means A requires individual molds depending on the size and branch shape of the electric wire, and requires press-fitting / cooling treatment, so that the equipment cost is high, and further, the process is complicated and workability is poor. .

In the means B, since the connecting portion is wrapped with butyl rubber, the connecting portion becomes large and heavy, and it takes time to press the press and wind the tape.

In the means C, for example, in a wire harness, it is difficult to pass a contraction tube through an electric wire in advance, and is not practical.

As in the case of A, the means D requires a large number of types of insulating covers, resulting in an increase in cost and a lack of practicality because the connecting portion is enlarged.

The present invention provides a waterproof structure that solves the above-mentioned disadvantages of the conventional means.

[Means for Solving the Problems] The waterproof structure of the present invention that solves the above-mentioned problems is characterized in that, in the wire connecting portion connecting the ends of the stripped wires, the expanded wire connecting portion including the covering portion near the bare wire portion is provided. Is sealed between upper and lower polymerized waterproof insulating sealing films, and embedded and sealed in a sealing layer made of “airborne moisture semi-solidifying waterproof insulating adhesive” provided between the sealing films. The first idea of "waterproof structure of the wire connection part characterized by the structure consisting of a part", and the "wire connection part connecting the ends of the stripped wires, the expanded wire connection part including the sheath near the bare wire part With a band-shaped seal layer made of `` a semi-solid moisture-solidified waterproof insulating adhesive '' provided along the inner peripheral edge of the sealing film, which is put between the vertically insulated waterproof insulating sealing films, Sealing the sealing film, It consists second invention of the electric wire waterproof structure of the connection part "according to claim structure consisting sealing part having a sealed space inside Irumu.

And as an aspect of the configuration of the first and second inventions,
While the single sealing film is folded in two in the middle, the enlarged electric wire connection part is inserted, the upper and lower two sealing films are used, or the excess of the sealing film is Means such as winding around the outer periphery to form a tape winding shape are adopted.

"Operation" In the waterproof structure of the first invention, the enlarged wire connection portion including the covering portion is embedded in the seal layer made of the adhesive,
In addition, the sealing layer has a structural feature of being wrapped and sealed by the sealing film. And since the adhesive has the property of rapidly solidifying due to air moisture, the seal layer embedded with the expanded electric wire connection part is exposed only to the surface layer by the air moisture that comes into contact until it is sealed by the sealing film. Becomes a semi-solidified coating, and is embedded in the coating by the “adhesive that maintains a liquid state without coming into contact with airborne moisture”.

Therefore, the liquid waterproof insulating adhesive in the seal layer penetrates and adheres to the gap between the exposed wires of the wire group and between the insulating coatings at the ends of each wire and the wires at the expanded wire connection part. The entire expanded wire connection portion is buried without gaps to insulate and waterproof.

Then, the portion embedded with the liquid waterproof insulating adhesive is protected and protected by the semi-solidified coating, and the semi-solidified coating is wrapped and sealed by the sealing film serving as the outer skin. The wire connection is excellent in mechanical protection performance and prevents damage by external force,
It is possible to enjoy a very high performance waterproof insulation performance by securing the waterproof insulation form satisfactorily and stably.

On the other hand, in the waterproof structure of the second invention, a band-shaped sealing layer made of the same adhesive as that of the first invention is provided along the inner peripheral edge of the sealing film that encloses and seals the enlarged wire connection portion. The adhesive that forms the layer is such that the surface layer rapidly solidifies due to the air that has come into contact with the film before it is wound, and stably forms a strip-like form and adheres well to the film (protruding or sealing by disturbing to the side). (It does not hang down in the direction of the stop space), and the sealing and waterproof insulation by the sealing film is effectively and stably supported, and high-quality waterproof insulation performance can be enjoyed. The waterproof structure according to the second aspect of the present invention is light in weight, consumes a small amount of adhesive, and can save resources because the inside of the sealing film is a sealing space.

And since the waterproof structure of the first and second inventions is made of a film sealing means, the shape of the connecting portion does not increase in size, and furthermore, even if the wire size or shape of the connecting portion is changed, Since a simple and immediate response can be made, the waterproofing operation is simplified and the efficiency is increased, and a special processing device such as a press machine and a waterproof member such as a case become unnecessary.

Further, in the case of using the auxiliary sealing film of the above embodiment, since the auxiliary sealing film acts to prevent the adhesive from slipping, the adhesive can be prevented from being wasted, and the sealing portion can be easily formed.

"Example" Hereinafter, a detailed description will be given based on an example. First, referring to FIG. 1 showing one embodiment of the first invention applied to a connection portion of an electric wire existing in the middle of a wire harness, a covering of a front end of a single electric wire 1A and two parallel electric wires 1B is shown. In an electric wire connection portion in which the stripped bare wire portions 2 are opposed to each other and branched and connected by the connection terminals 3, an enlarged wire connection portion 5 (hereinafter, referred to as an enlarged wire connection portion 5 including a continuation terminal 3, the bare wire portion 2, and a coating portion 4 near the bare wire portion 2) , Simply referred to as an enlarged connecting portion 5) is a “water-proof semi-solidified liquid waterproof insulating adhesive” (in this embodiment, a silicone rubber-based Toray Dow Corning.
Use SE9176 (product number) manufactured by Silicone Co., Ltd.)
As shown in FIG. 1 (B), the sealing layer 6 is formed of a two-fold single-sided adhesive surface waterproof insulating sealing film 7 obtained by folding a single sheet in the middle, as shown in FIG. The sealing film 7 of this embodiment is a known insulating tape for electric wires, and a sealing portion 9 is formed by the sealing film 7 and the sealing layer 6. Then, a surplus portion of the sealing film 7 is wound around the outer periphery of the sealing portion 9 to form a protective tape winding 8.

The waterproof structure of the embodiment shown in FIG. 1 is formed as follows. That is, referring to FIG. 3 showing the forming procedure, first, a rectangular one-sided adhesive surface sealing film 7 cut to a required size is stretched, and an appropriate amount of the adhesive 10 is raised on the adhesive surface. The enlarged connecting portion 5 is pushed into the pile of the adhesive 10, and the single sealing film 7 is folded in the middle and folded in two as shown in FIG. Is formed. Subsequently, the excess portion of the sealing film 7 is wound around the sealing portion 9 to form a tape winding 8, thereby forming a fatty water structure in which the enlarged connecting portion 5 shown in FIG. 3 (D) is sealed.

The waterproof structure of the embodiment shown in FIG. That is, since the sealing layer 6 is made of a “water-proof semi-solidified waterproof insulating adhesive”, the adhesive supplied on the sealing film 7 and embedding the enlarged connecting portion 5 is such that the surface layer rapidly becomes air-tight. A semi-solidified coating is formed by moisture to form a semi-solidified coating, and the liquid contacting agent is cut off from the air contact by the semi-solidified coating. Extremely high quality waterproof insulation performance with no gaps can be secured by actively flowing into and penetrating between the conductor strands of the bare wire portion 2 and between the conductor strands of each electric wire and the insulating coating.

Next, FIG. 2 shows an embodiment of the second invention, in which the enlarging connection part 5 is wrapped in a single sealing film 7 which is folded in half in the middle and vertically polymerized, and the film is wrapped. The expanded connecting portion 5 is sealed by a band-shaped sealing layer 6 made of a waterproof and insulating air / water semi-solidifying adhesive (the adhesive is the same as that of the embodiment shown in FIG. 1) provided on the periphery of 7. A sealing space is provided around the enlarged connection portion 5 in the sealing film 7. The embodiment of FIG. 2 also has the above-mentioned effect.

Next, an example of the above embodiment will be described with reference to FIG. The sealing portion 9 of this embodiment is obtained by laminating a small auxiliary sealing film 11 adhered to one side of the enlarged connecting portion 5 and a sealing film 7 of a required size, enclosing the enlarged connecting portion 5 therein, A sealing layer 6 is provided in which the enlarged connection portion 5 between the superposed sealing film 7 and the auxiliary film 11 is embedded by the adhesive, and the sealing film 7 and the auxiliary sealing film 11 are provided.
A tape winding 8 in which the enlarged connection portion 5 is sealed by 11 and a surplus portion of the sealing film 7 is wound around the sealing portion 9 is provided.

In FIG. 4, the adhesive forming the seal layer 6 is prevented from slipping by the auxiliary sealing tape 11 to prevent unnecessary protrusion and dissipation, so that the adhesive loss is reduced and the sealing film 7 is removed. Folding and tape winding 8 become easier.

4 is formed by attaching the small-sized auxiliary sealing film 11 on the upper side of the enlarged connecting portion 5 in advance as shown in FIG. 5 and then performing the same procedure as that shown in FIG. .

Next, the automatic machining method of the embodiment of FIG. 4 will be described with reference to FIG. That is, a known wire tape winding machine 12 is provided with an adhesive supply section 13 for the adhesive and a film supply section 14 for the auxiliary sealing film 11, and a film is provided above the enlarged connection section 5 of the electric wire 1AlB held by hand. The auxiliary sealing film 11 of a required size sent from the supply unit 14 is automatically pasted in advance, and the adhesive 10 is automatically supplied to the sealing film 7 fed from the film feed unit 15 and placed thereon. When the wire 1A1B is pushed down and inserted into the tape winding part 16,
The waterproof structure shown in FIG. 4 in which the enlarged connection portion 5 is sealed can be efficiently and automatically formed.

When the sealing film 11 and the auxiliary sealing film 11 are used together, the sealing may be performed by the band-shaped sealing layer 6 along the sealing edge formed by the sealing film 7 and the auxiliary sealing film 11.

Further, the electric wire connection part to which the present invention is applied is not limited to the above-described embodiment, but is widely applied to connection between single wires or a connection part that does not use connection terminals.

"Effects of the invention" As described above, the waterproof structure of the wire connection part of the present invention ensures high quality waterproofness without causing enlargement of the shape and simplifies the waterproofing process to improve workability and efficiency. There is also the practical effect that they are achieved and that they are achieved at low cost without the need for special processing equipment and processing members.

[Brief description of the drawings]

FIG. 1: shows the waterproof structure of the first invention one embodiment, (A) is a front view, (B) is a central cross-sectional view of the sealed state,
(C) is a central cross-sectional view of (A), FIG. 2: front view of one embodiment of the second invention, FIGS. 3 (A) to (D): explanatory views of the processing procedure of FIG. FIG. 4: shows a waterproof structure of another embodiment of the present invention, (A) is a front view thereof, (B) is a central cross-sectional view of (A), FIG. 5: FIG. Explanatory diagram,
FIG. 6: Perspective view of the processing method of FIG. 4 Example Main symbols, 1A1B: electric wire, 2: bare wire portion, 3: connection terminal, 4: covering portion, 5: enlarged connection portion, 6: seal layer, 7: sealing film, 8: tape winding, 9: sealing part, 10: adhesive, 11: auxiliary sealing film,
12: tape winding machine, 13: adhesive supply section, 14: film supply section, 15: film field section, 16: tape winding section

Continuation of the front page (56) References JP-A-1-206573 (JP, A) JP-A-1-69332 (JP, U) JP-A-57-64072 (JP, U) JP-A-62-200255 (JP) , U) JP-B-59-3510 (JP, B2) JP-B-50-33557 (JP, B1) JP-B-45-16148 (JP, B1) JP-B-41-17327 (JP, Y1) (58) Field surveyed (Int.Cl. ⁶ , DB name) H01R 4/70

Claims (5)

(57) [Scope of request for utility model registration] In an electric wire connecting portion for connecting an end of an electric wire whose coating has been peeled off, an enlarged electric wire connecting portion including a covering portion near a bare wire portion is inserted between a vertically insulated waterproof insulating sealing film, A waterproof structure for an electric wire connection part, characterized by a structure comprising a sealing part embedded and sealed in a sealing layer made of a semi-solid air-moisture waterproof insulating adhesive provided between sealing films. 2. An expanded wire connecting portion including a covering portion in the vicinity of a bare wire portion is inserted between a vertically insulated waterproof insulating sealing film in a wire connecting portion for connecting the ends of the stripped wires. The sealing film is sealed with a band-shaped sealing layer made of a water-soluble semi-solidified waterproof insulating adhesive provided along the inner peripheral edge of the sealing film, and a sealing space is formed in the sealing film. A waterproof structure for an electric wire connection part, characterized by a structure comprising a sealing part provided with a seal. 3. The waterproof structure for an electric wire connecting portion according to claim 1 or 2, wherein the upper and lower polymerization sealing film is a single sealing film folded in half in the middle of a utility model. . 4. The utility model registration claim (1) or (2), wherein the upper and lower polymerization sealing film comprises a sealing film and an upper auxiliary sealing film attached to the enlarged electric wire connection portion. 2) Waterproof structure of the electric wire connection section. 5. A utility model registration in which a surplus of a sealing film is wound around an outer periphery of a sealing portion to form a tape winding form, wherein claims (1), (2), (3), Item (4).