JP2000200631A - Wire connection sealing structure and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealing structure having a wire connection for accessory wires branching from a base wire, whereby workability is improved, the yield of a sealing material is improved and material is reduced in cost, and provide its manufacturing method. SOLUTION: Both conductors having two accessory wires 11, 12 separated and exposed so as to branch on the way of a base wire 10 are connected to each other and caulked by a connector 13 to form a joint connection. The connector is positioned in a wire positioning recess in an adhesive and soft sealing member 20 in a planely hooked shape, and two accessory wires are put in contact with the surface of a lateral side portion 22a of a seal sub-portion 22 and the base wire is put in contact with the rear of the lateral side portion for positioning. A vertical side portion 22d is bent at an angle for two accessory wires at an upper place to be retained thereabove and separated with each other. Then, a seal main portion 21 is turned thereunder for the base wire at a lower place to be wrapped thereunder and the end of the seal main portion is turned up for the vertical side portion to be wrapped thereabove and for the accessory wires to be further wrapped thereabove in double.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire connection portion sealing structure and a method of manufacturing the same.

[0002]

2. Description of the Related Art In general, when the tip of an accessory wire is connected to the middle of an electric wire serving as a base line to form a joint connection portion as if the accessory line branched from the base line, the joint connection portion has a waterproof seal structure. It is said. FIGS. 5 (a) and 5 (b)
As an example of the electric wire connection portion sealing structure, there is shown a sealing material described in Japanese Utility Model Laid-Open No. 1-93918 previously proposed by the present applicant.

[0003] In this case, the covering insulation at an intermediate position of the base line 1 is peeled off, and the conductor 2 is exposed only there. The conductor 4 is also exposed by peeling off the covering insulation at the end of the attachment wire 3.
The stripped and exposed conductors 2 and 4 are connected and connected.

On the other hand, in order to form a waterproof seal structure at the connection portion, a sealing material 5 formed into a soft and sticky sheet such as butyl rubber is prepared. The sealing member 5 has a rectangular sealing body 6 serving as a main portion, and a protruding piece 7 is provided so as to protrude from one end of the sealing body 6, and the entire planar shape is convex. I have.

First, as shown in FIG. 5 (a), using a sealing material 5 having a flat convex shape, conductors 2 and 4 of a portion where the base line 1 and the attachment line 3 are connected are applied on a seal body 6. that time,
The base line 1 is placed on one side of the projecting piece 7 of the sealing material 5 with the projecting piece 7 interposed therebetween.
Attach the accessory line 3 to the other side so that it is forked.
In this state, both ends 6a, 6a of the sealing body 6 of the sealing material 5
b with each other facing each other, and the base line 1
And the wires 2 and 3 of the accessory wire 3 are wound and wrapped in close contact. Subsequently, the protruding piece 7 is inserted between the base line 1 and the attachment line 3 and folded in close contact. FIG. 5 (b)
This shows the seal structure after the work has been completed so far, and forms a wire connection portion seal structure in which the attachment line 3 is branched from the base line 1.

In the example shown in FIGS. 5 (a) and 5 (b), one incidental line 3 is shown as being branched, but a plurality of additional lines 3 may be branched. In the case of a joint connection portion, a sealing material 5 having a flat convex shape provided with only one branching projection 7 cannot be used. Therefore,
In that case, another type of sealing material 5 provided with a plurality of projecting pieces 7 shown in FIG. 5C is prepared.

[0007]

However, in the above-described conventional wire connection portion seal structure shown in FIGS. 5A to 5C, there is room for improvement in the following points. .

One is that the sealing material 5 is basically based on a shape in which one or a plurality of protruding pieces 7 protrude from its main body 6. Since the sealing material 5 has such a planar convex shape, the positioning direction and the working direction of the joint connection portion are uniquely determined, and the workability is low. Moreover,
It is difficult to determine the positioning at the beginning of the operation easily, and the quality of the completed seal structure tends to vary.

The other is that, since the planar shape is a unique shape of a convex shape, the material removal of the sealing material 5 is large, the material yield is deteriorated, and the material cost is increased.

Further, in connection with the above two problems, a plurality of accessory lines 3 are branched from the electric wire base line 1 such as two, three,. It is necessary to prepare a plurality of irregularly shaped sealing materials 5 provided with the protruding pieces 7, which is troublesome in all aspects including production management by various types.

Accordingly, a first object of the present invention is to provide an electric wire connection structure in which an auxiliary wire is branched from a base line, the workability of which is improved by using a sealing material, and an electric wire having a uniform waterproof quality. An object of the present invention is to provide a connection part sealing structure and a method of manufacturing the same.

A second object of the present invention is to provide an electric wire connection portion sealing structure which improves the yield of the sealing material and reduces the material cost, and a method of manufacturing the same.

Further, a third object of the present invention is to provide a seal structure for an electric wire connection portion and a method of manufacturing the same, wherein a single type of seal material can cope with a seal structure in which an arbitrary number of accessory lines branch off from a base line. It is to provide.

[0014]

According to a first aspect of the present invention, there is provided an electric wire connecting portion sealing structure in which conductors are connected to each other as if an arbitrary number of accessory wires are branched from the middle of a base line of the electric wire. A joint connection portion is formed by being connected through the joint member, and the joint connection portion is covered with a seal member to secure required waterproofness, and the seal member is made of an adhesive soft material. A seal sub-portion is formed of a sheet material into a planar key shape, and a seal sub-portion protrudes in a plane L-shape from a seal main portion of a portion forming a key-shaped main body portion, and a horizontal side portion and a vertical side forming the seal sub portion The connector is positioned by abutting against the inner edge of the lateral side portion of the seal sub-portion, in the wire positioning concave portion of the space surrounded by the portion and the seal main portion, and the base line on the side branched from the connector. and In the state where the attached line is separately attached to the front and back sides of the horizontal side portion and attached, the attached line is wrapped by the vertical side portion of the seal sub-portion, and the seal main portion is folded back to form the base line. By wrapping between the horizontal side and the double wrapping of the accessory line from above the vertical side portion, the base line and the accessory line are covered with the seal member in a state where they are separated from each other. I have.

According to the above configuration, the seal member is formed in a key shape, so that an arbitrary number of accessory lines are wrapped in a state of being partitioned by the seal sub-part, and the accessory lines are further wrapped by the seal main part from above. Since it is double-wrapped, the base line and the auxiliary line are covered one by one in a completely separated state, and the required waterproofness can be obtained. Even when there are a plurality of attached lines, the seal main portion and the seal sub-portion are double-coated, so that the minimum size (length, etc.) of the seal sub-portion is sufficient and the yield is good.

According to a second aspect of the present invention, the base line is attached to a back surface of a side portion of the seal sub-portion, and the attached line is attached to the side portion thereof. Positioned by sticking to the surface of the, the auxiliary line on the front side is wrapped from above by the vertical side portion, and the auxiliary line is wrapped from below by the seal main portion wrapping the base line on the back side from below. It is characterized by being double covered.

That is, in this case, if the accessory line is preferably positioned so as to be on the lateral side surface of the seal sub-portion, the accessory line can be wrapped from above at the lateral side portion, so that the hand direction is good and work efficiency is improved. I do.

Further, in the electric wire connecting portion sealing structure according to the third aspect, when the number of the accessory lines is two or more, the auxiliary side portions are separated from each other by the lateral side portion of the seal sub-portion. It is characterized by being enveloped.

In this case, even if there are two or more accessory lines,
If the seal sub-portion is obliquely folded, the attachment lines can be wrapped from above with the attachment lines separated from each other. That is, a seal sub-portion of a minimum size is sufficient for a plurality of accessory lines.

On the other hand, according to a method of manufacturing a wire connection portion sealing structure according to a fourth aspect of the present invention, a conductor in which an insulating sheath is peeled and exposed as if an arbitrary number of accessory wires are branched from the middle of the wire base line. A connection step of connecting the two via a connector to form a joint connection part, and a space between the seal main part and the seal having a key shape using an adhesive soft sheet material is an electric wire positioning recess. A seal member was prepared, and the base line on the side branched from the connector arranged in the wire positioning concave portion was arranged in contact with the back surface of the seal sub-portion, and the surface was contacted with the attachment line to partition the wire. A joint connecting portion seal positioning step of positioning in a state, and wrapping the auxiliary lines so as to partition each other at the seal sub-portion, and then wrapping the base line by the seal main portion. In addition, by further wrapping the accessory line doubly from above the seal sub-portion at the seal main portion, the base line and the accessory line are covered one by one in a state where they are separated from each other to secure required waterproofness. And forming a seal.

As described above, in each step, the connector is first brought into contact with the key-shaped sealing member in the wire positioning concave portion, so that the initial positioning of the joint connection portion with respect to the sealing member is easy and reliable. Increases sex. In addition, the seal main part and the seal sub part allow a plurality of accessory wires, even those having a large diameter, to be independently partitioned and closely adhered, so that required waterproofness can be obtained. Each process up to the finish is efficient, and products of constant quality can be manufactured.

[0022]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a seal structure for a wire connection part and a method of manufacturing the same according to the present invention.

FIGS. 1 to 3 are perspective views showing the electric wire connection portion sealing structure according to the first embodiment and the manufacturing process thereof.
As shown in FIG. 1, first, one base line 10 forming an electric wire is formed.
In the middle part of the above, the covering insulating skin of the part is peeled off to expose the conductor 10a. Exposed portion conductor 10 of this baseline 10
The conductors 11a and 12a, which are obtained by peeling off the covering insulating sheaths at the ends of the two attached wires 11 and 12, are connected to a. Furthermore, by crimping the conductor connection portions of the three wires in total from above with the connector 13, the joint connection portion shown in the drawing as if the two accessory wires 11 and 12 were branched from the middle of the base line 10. Be composed.

On the other hand, a sheet-shaped, flat key-shaped seal member 20 shown in FIG. 2 is prepared. This sealing member 2
As the material of No. 0, a soft, tacky material having good workability by bending, for example, a butyl rubber sheet is used.

The seal member 20 includes a seal main portion 21 forming a main body and a seal sub-portion 22 protruding from the seal main portion 21 in an L-shape. Seal main part 21
Is formed by connecting a vertical edge 21a and an inclined edge 21b inclined at an acute angle α to the vertical edge 21a. The seal main portion 21 at the inclined edge 21b is a triangular-shaped wire positioning assisting portion 21c.

On the other hand, the seal sub-portion 22 is
And a vertical side 22b perpendicular to the vertical edge 21a. With such an L-shaped key shape, a space surrounded by the seal main portion 21 and the seal sub-portion 22 is a wire positioning concave portion 23.

Next, in the joint connecting portion seal positioning step, first, as shown in FIG.
0 and the two attached lines 11 and 12 are prepared by being separated from each other by jumping up. At this time, preferably, two accessory lines 11 and 12 are placed at a higher position, and one base line 10 is placed at a lower position, depending on the direction and operability of the work.

Subsequently, as shown in FIG. 3 (a), the connector 13 is placed in the electric wire positioning recess 23, and one base line 10 is slid from the lower side into the side 22a of the seal sub-portion 22 from below. The two accessory lines 11 and 12 are attached to the side 22a from above, and the three auxiliary lines are separated while separating the three lines.
2 Contact and touch the upper and lower surfaces. Thereby,
The connector 13 is positioned so as to abut on the inner edge of the side portion 22 a of the seal sub-portion 22. At this time, the base line 10 on the rear side from the connector 12 is positioned straight so as to be attached to the electric wire positioning assisting portion 21c of the seal main portion 21 from below.

Thereafter, as shown in FIG. 3 (b), the upper two accessory lines 11, 1 at the vertical side 22b of the seal sub-portion 22.
Wrap 2 around from above. At this time, the vertical side portion 22b is bent obliquely, and the two attached wires 11 and 12 are separated from each other by using the length thereof to be closely attached to each other.

As is apparent from the above procedure, the lower one base line 10 and the upper two auxiliary lines 11 and 12 are completely separated from each other by the front and back surfaces of the side portion 22a of the seal sub-portion 22,
Also, it can be understood that the two accessory lines 11, 12 are separated from each other by the vertical side portion 22b so as to be in non-contact with each other.

Next, as shown in FIG. 3 (c), the lower one base line 10 is wrapped from below so that the seal main portion 21 constituting the main body portion is turned from below. Further, the tip of the seal main portion 21 is turned upward, and the vertical side portion 22 is turned.
b is wrapped from above, and is separated
The accessory lines 11 and 12 of the book are further double-wrapped from above.

FIG. 3D shows a cross section in a state where the three base lines 10 and the two auxiliary lines 11 and 12 are individually and completely separated from each other by the sealing member 20. ing. Therefore, it is effective to increase waterproofness by reliably separating the lines. The spiral seal member 2 formed by the wrapping
It is preferable that both ends of 0 are twisted in the relative direction to form a pupal shape.

Although the protective tape winding step of the next step is not shown, in this embodiment, the sealing member 20 twisted into the pupil shape shown in FIG. Spiral wound with tape to cover and protect. It is desirable that the protective tape starts to be wound at a position away from one end of the seal member 20 by, for example, 10 mm or more and ends at the other end. After winding with the protective tape, it is confirmed that there is no exposed portion of the seal member 20, and a cocoon-shaped electric wire connection portion sealing structure is completed.

In the present embodiment, the seal sub-portion 22 is abutted on the side where the base line 10 and the attachment lines 11 and 12 branch off from the connector 13. Thereby, the initial relative positioning of the joint connection portion and the seal member 20 is easily and accurately performed, and a high-quality wire connection portion seal structure having a constant appearance can be obtained.

In the present embodiment, one base line 10
In contrast to the above, a wire connection portion sealing structure in which two accessory wires 11 and 12 are branched from the middle is shown, but the number of such accessory wires is not limited. For example, the second embodiment in which one accessory line 14 is connected to one base line 10 is of course also possible. Also in this case, the same type and the same type as the seal member 20 shown in FIG. 2 can be used. Further, as a third embodiment, one base line 1
It is also possible to adopt an electric wire connection portion seal structure in which three accessory lines are branched from zero. Also in this case, the first and second
Using the same kind of sealing member 20 as that of the embodiment,
One base line 1 is provided on the back side of the side portion 22a of the seal sub-portion 22.
0 is arranged, and three accessory lines are arranged on the surface side of the side portion 22a.

Here, FIGS. 4 (a) and 4 (b) are used without departing from the technical idea of the present invention including the above embodiments.
There is an example shown in

That is, when the seal member 2 has a simple planar L-shape, this solves the above-mentioned problem as compared with the prior art shown in FIGS. 5 (a) to 5 (c). It has excellent effects. However, in this case, the baseline 10
If the outer diameters of these wires are considerably large relative to the size of the seal sub-portion 22, the length of the seal sub-portion 22 is increased. Due to insufficient pod size, the attachment lines 11 and 12 cannot be completely separated from each other, and may come into contact as shown in FIG.

Further, as shown in FIG. 4 (a), at the time of positioning, the base line 1 of the portion just before the branch portion from the connector 13 is formed.
No. 0 does not interfere with the seal main portion 21 at all, and is in a free state free from restriction or regulation. Then, the base line 10 of the free portion may hang down as shown by the imaginary line symbol A in FIG. Further, as shown by the imaginary line symbol B in the figure, when the base line 10 of the free portion obliquely interferes with the seal main portion 21 and sticks thereto, FIG.
In this step, the length of winding the protective tape becomes unnecessarily long, and there is a disadvantage that the entire wire connection part sealing structure becomes large.

As a result, the quality may not satisfy the functions such as the required waterproofness described above. If the length of the seal sub-portion 22 of the seal member 20 is increased in order to solve such a problem, the yield is reduced, and the above-described FIG.
There is a problem that the finished outer shape in (d) is enlarged.

Therefore, as shown in FIGS. 1 to 3 (a) to 3 (d), the seal member 20 has a planar key shape as shown in FIGS.
The problems such as (a) and (b) are all eliminated, and material loss is hardly a problem. The material cost can be reduced in combination with the processing cost, and the work efficiency and the quality of the seal portion are dramatically improved. Can be expected.

[0041]

As described above, the electric wire connecting portion sealing structure according to the present invention is used for waterproofing a branch portion between a base line forming a joint connecting portion by connecting conductors and an arbitrary number of attached wires. By forming the seal member in a key shape, the seal sub-part wraps up an arbitrary number of accessory lines in a partitioned state, and further wraps the accessory lines doubly in the seal main part from above. Attached line is 1
Each book is covered in a completely partitioned state, and the required waterproofness can be obtained. Even if there are multiple accessory lines or a large-diameter size, the seal main part and the seal sub-part that is diagonally folded are double-coated, so the minimum size of this seal sub-part (length, etc.) ) Is sufficient, the yield is good,
Requires minimal material costs.

The number of accessory lines branching from the base line is 2
Even if the number increases, such as three or three, it can be dealt with only by preparing a single kind of seal member, and the inconvenience of preparing seal members having different shapes by the number corresponding to the number of accessory lines as in the related art is solved. In addition, there is an advantage that production management costs including equipment costs and assembly work costs can be reduced, and a constant quality can be maintained.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a first embodiment of a power supply connection portion sealing structure according to the present invention, in which one prepared wire base line and two attached wires are caulked with a connector to prepare for a sealing process in the next step. It is a perspective view which shows the joint connection part of a connection stage.

FIG. 2 is a plan view showing a flat key-shaped seal member as the first embodiment.

FIG. 3A is a perspective view showing a stage of positioning and attaching a joint connection portion to a seal member, and FIG. 3B is a perspective view showing an initial stage of a seal forming operation in the first embodiment. FIG. 3C is a perspective view showing a state in which the seal member is bent to wind the joint connection portion, and FIG. 4D is a schematic view showing a state where the seal is completed and the seal member is uniformly interposed between the lines. FIG.

FIG. 4 is a perspective view showing another example included in the technical idea of the present invention for comparison with the first embodiment, and a cross-sectional view of a completed sealing state.

FIG. 5 (a) is a perspective view showing a stage in which a connection part by one base line and one attached line is formed as a seal structure by a seal member having a planar convex shape as a conventional example, FIG. FIG. 2B is a perspective view showing the completed electric wire connection portion sealing structure of the conventional example, and FIG. 2C is a perspective view showing a single seal member of a different kind.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Baseline of electric wire 10a Conductor 11, 12 Attached wire 11a, 12a Conductor 13 Connector of joint connection part 20 Seal member 21 Seal main part 21a Vertical edge 21b Inclined edge 22 Seal auxiliary part 22a Horizontal side 22b Vertical side

Claims (4)

[Claims] 1. A joint connecting portion is formed by connecting conductors through connectors as if an arbitrary number of accessory wires are branched from the middle of a base line of an electric wire, and a joint connecting portion is formed. A wire connection portion sealing structure which is covered with a wire to secure required waterproofness, wherein the sealing member is formed in a planar key shape by an adhesive soft sheet material, and a key-shaped main body portion The seal sub-portion protrudes from the main portion of the seal in the shape of a flat L-shape, and the wire positioning recess in the space surrounded by the horizontal and vertical sides forming the sub-seal and the main portion of the seal The connector is positioned by abutting against the inner edge of the side portion of the seal sub-portion, and the base line and the accessory line branched from the connector are divided into front and back sides of the side portion, respectively. Get in In a state where the stick, together wrap around the accessory lines by the longitudinal side portions of the sealing sub-part,
A state in which the base line and the auxiliary line are separated from each other by folding back the seal main portion and wrapping the base line between the horizontal side portion and wrapping the auxiliary line twice from above the vertical side portion. The electric wire connection part sealing structure characterized by being covered with the seal member. 2. The method according to claim 1, wherein the base line is attached to a back surface of a side portion of the seal sub-portion, and the attachment line is attached to a surface of the side portion to position the base line. The auxiliary line is wrapped from above by the vertical side portion, and the auxiliary line is doubly covered from above the vertical side portion by the seal main portion wrapping the base line on the back side from below. An electric wire connection part seal structure according to claim 1. 3. When the number of the accessory lines is two or more,
The electric wire connection part sealing structure according to claim 1 or 2, wherein the attachment lines are wrapped by the side part of the seal subpart in a state of being separated from each other. 4. A connecting step of connecting via a connector the conductors whose exfoliation and exfoliation are peeled off as if an arbitrary number of attached wires are branched from the middle of the electric wire base line, to form a joint connection portion. A seal member having a key-shaped seal main part and a space between the seals is a wire positioning recess using a soft sheet material having adhesiveness, and a branch is formed from the connector arranged in the wire positioning recess. A joint connecting portion seal positioning step of positioning the base line on the side to be contacted with the back surface of the seal sub-portion in contact with the attached line on the front surface and positioning it in a partitioned state; The lines are wrapped so as to partition each other, and then the base line is wrapped by the seal main portion. A seal forming step of covering the base line and the auxiliary line one by one with each other so as to secure required waterproofness by wrapping the base line in a double-wrapped manner. Manufacturing method.