JPH01154472A - Bonded wire material and manufacture thereof - Google Patents

Abstract

PURPOSE:To obtain excellent airtightness and to improve sealing property and work efficiency by covering a bonding portion with a covering material made by filling the inside of a supporting body with a sealing agent. CONSTITUTION:A portion of an insulation cover of each of conductor wires W1-W3 is stripped and the stripped portion of the wire W1 is brought into contact with the stripped portions of conductor wires W2, W3 and are bonded to form a bonded conductor wire 2. Namely, as a covering material 3 covering the bonded portion of the bonded wire 1 retains a sealing agent 5 in a supporting body 4, the bonded portion of the bonded wire 1 is covered by making the bonded portion of the bonded wire 1 to be interposed in a sealing agent 5 of the inside of the covering member and by solidifying the sealing agent 5. This simplifies the covering work of the bonded portion and moreover the bonded portion is sealed securely.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is a method for joining wire materials such as lead wires, wire harnesses, cables, and optical fiber cables.

The present invention relates to a bonded wire whose bonded portion is covered with a coating material and a method for manufacturing the same.

(Prior art) For example, automotive wiring harnesses include main harnesses, side harnesses, engine subharnesses, rear harnesses, door harnesses, instrument harnesses, etc. These wiring harnesses are made of many wires. It is constructed by joining and connecting conducting wires.

This joining conductor is made by, for example, removing the insulation coating from each conductor to be joined and leaving it in a bare wire state, and then connecting the bare wire portions to each other. i, and joined by using a gold-flange joining terminal, or directly by fusion welding in a hot state.

In addition, in order to prevent metal corrosion caused by water intrusion or salt damage into the joint, which may cause negative effects such as poor electrical connection or disconnection, these jointed wires are coated with a covering material at the joint and the vicinity thereof. Protected by coating.

Conventional bonded wire rods and their manufacturing methods include:
For example, there are the following:

■ Use insulating vinyl tape as a covering material and wrap this insulating vinyl tape around the joint.

(2) Using a thermoplastic resin as the covering material, a: It is molded by an extrusion method and at the same time is solidified at the joint to seal the joint.

b; Molded into a sheet and bonded to the joint by thermocompression.

C: Seal by injecting heat-meltable resin into the container into which the joint is inserted.

(2) Using a heat-shrinkable tube as a covering material, the connecting portion is passed through the heat-shrinkable tube, and then a certain temperature is applied from the outside of the tube to shrink the tube.

(Problems to be Solved by the Invention) However, the above-mentioned bonded wire rods and manufacturing methods thereof have the following drawbacks.

■ When wrapping tape around the joints of bonded wires, a considerable amount of tension must be applied first, otherwise gaps will form between the wraps of the tape and the sealing performance will deteriorate, and such work must be done manually. If done manually, it would be labor intensive and productivity would be poor, and moreover, such winding would require skill.

@a; The equipment becomes larger due to the need for extrusion molding machines, etc.
Furthermore, since thermoplastic resins can only be handled in solid form once they reach room temperature, they cannot be moved to the next step until they reach room temperature.

b: Poor followability and poor adhesion to the joint, resulting in incomplete sealing and water infiltration.

C: The joint becomes derailed or disconnected within the container because heat-meltable resin is injected and solidified while the joint is inserted into the container.

■ The need to pass the joining wire through the tube is time consuming and difficult to work with, and gaps are likely to form.
Furthermore, once both ends of the bonded wire have been connected to other members, they cannot be passed through the tube, making it impossible to cover them.

In addition, since none of the above-mentioned covering materials can be completely waterproof, in order to prevent water from entering the joints of the joint wires and connection failures and disconnections due to salt damage,
For example, the harness is routed all the way into the vehicle interior, and the joints are placed inside the vehicle interior. However, in this case, it takes time and effort to wire the harness, the harness becomes long and the number of harnesses is multiplied, and it becomes necessary to secure a large space for the harness, which increases the cost.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the first invention covers the joint portion of the joint conductor with a covering material containing a sealant inside the support. Further, the second invention uses a coating material in which the inside of the support is filled with a sealant, and after interposing the joint portion of the bonded wire in the sealant inside the coating material, the sealant is cured. to cover the joint part of the joint wire. In addition, in this specification.

"Wire material J is used not only for lead wires, electric wires, wire harnesses, cables, optical fiber cables, etc., but also for connecting conductor wires and connecting terminals, and piping.
Furthermore, the term "r-junction" or "junction" is used to include "connection" or "connection part."

(Function) Since the sheathing material that covers the joints of the spliced wires has a sealant held inside the support, the joints of the spliced wires are interposed in the sealant inside the sheathing material and the sealant is applied. By curing, the joint portion of the joint wire is coated. Therefore, the work of covering the joint becomes easy, and the joint is reliably sealed.

(Example) Embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a perspective view showing a joint portion of a joint wire showing a first embodiment of the present invention.

This bonded wire 1 is a bonded conductive wire 2 formed by bonding a plurality of conductive wires W1 to W3, and a bonded portion thereof is covered with a covering material 3. As shown in FIG.
After removing the insulating coatings of each of the conductive wires W1 to W3 to make them bare wires, the bare wire portion of the conductive wire W1 and the bare wire portion of the conductive wire W2. The bare wire parts of W3 are brought into contact with each other and joined by soldering, using a metal joining terminal, or by direct fusion welding in a hot state, and the figure 7 shape of this joining conductor 2 The joint portion and its vicinity are covered with a covering material 3.

As shown in FIG. 3, the covering material 3 includes a support 4 filled with a sealant 5. As shown in FIGS. 4 to 6, the support 4 is made of a plastic molded product obtained by vacuum forming a plastic sheet such as polypropylene, and has two shells 7 and 7 integrally formed so as to be openable and closable. Each shell body 7 is formed with a recess 8 (numerals are attached to the outside for convenience in FIGS. 3, 5F!, and 6) for filling the sealant 5, and Each shell 7 is partially cut to form a bent portion 8 that bends when the bonding wire is sandwiched therebetween.

As the sealant 5, for example, a jelly-like ultraviolet curable resin composition or a foam-like hot melt agent can be used. Note that when an ultraviolet curable resin composition is used as the sealant 5, the support 4 is formed of a material that can transmit ultraviolet rays.

The ultraviolet curable resin used as the sealant 5 is not particularly limited as long as it can be cured by ultraviolet irradiation, but
For example, epoxy resin, acrylic resin, polyurethane resin, and silicone resin can be used.

This ultraviolet curable resin can maintain a jelly-like state at least to the extent that it does not flow out from the support until it is cured after being filled into the support.

To make an ultraviolet curable resin into a jelly, a gelling agent is added to the ultraviolet curable resin. Examples of the gelling agent include acylamino acid derivatives, sorbitol derivatives, organic bentonite, asbestos powder, silica powder, and hydrogenated castor oil.

Examples of acyl amino acid derivatives include lauroyl glutamate dibutylamide, lauroyl glutamate distearylamide, lauroyl glutamate dilaurylamine salt, lauroyl glutamate dilauryl ester, cicapriloyl ricin laurylamide, cicapriloyl ricin laurylamine salt, and cicabroyl lisine lauryl ester. , lauroyl valine butyramide, lauroyl phenylalanine lauryl amide, lauroyl phenylalanine lauryl amine salt, etc. Among these, preferred is lauroyl glutamic acid dibutyl amide.

Further, examples of sorbitol derivatives include dibenzylidene sorbitol, benzylidene hydroxybenzylidene sorbitol, and the like.

The blending ratio of the above-mentioned gelling agent must be such that the ultraviolet curable resin is jelly-formed at least to the extent that it does not run off from the support 4, but the amount varies depending on the type of gelling agent. For example, the amount of gelling agent added to the ultraviolet curable resin of acylamino acid derivatives and sorbitol derivatives is 3 to 15 parts by weight per 100 parts by weight of the resin.

If the gelling agent is less than 3 parts by weight, it will not gel to the extent that it can be reliably retained within the support 4, and if it exceeds 15 parts by weight, it will exceed the limit of compatibility with the resin.

Foamy hot-melt agents are produced by heating and melting solid hot-melt agents and then mechanically converting them into gas hot-melt agents such as N3 or CO□ under certain pressurized conditions in a system that has prepared foaming conditions. When the hot-melt agent is mixed and melted, and then this hot-melt agent is discharged from a gun, the gas is foamed and a foamed hot-melt agent is obtained.

Examples of the hot melt agent include ethylene vinyl acetate resin, vinyl acetate resin, polyamide resin, polyolefin resin, acrylic resin, vinyl chloride resin, ethylene vinyl acetate copolymer resin, polyethylene resin, and polypropylene resin. It is possible to use resins whose main components are polybutadiene-based resins, polybutadiene-based resins, polyisoprene-based resins, and polyimide-based resins. For hot melt agents, use one type of these resins, or use two or more types.
- Mixtures of resin combinations can be used. The hot melt agent may also contain various additives such as plasticizers, tackifiers, stabilizers, and the like.

Further, it is necessary that this foamy hot melt agent maintains its foam shape for at least the time required for coating the bonding wire and does not harden to the extent that it prevents the bonding wire from intervening.

A method for manufacturing the bonded wire 1 by covering the bonded portion of the bonded conductive wire 2 using the coating material 3 will be described. The same drawings are also referred to for both the case where an ultraviolet curable resin is used as the sealant 5 and the case where a foamy hot melt agent is used.

First, when using an ultraviolet curable resin as the sealant 5, the support 4 is filled with a jelly-like ultraviolet curable resin composition 5 as a sealant, and the coating material 3 as shown in FIG. form.

Then, at an arbitrary time when the joint part of the joint conductor 2 is coated,
As shown in FIG. 7, with the shell 7 of the covering material 3 open, the figure-7 joint of the joining conductor 2 is connected to the ultraviolet curable resin composition 3 in one shell 7 of the support 4. After filling it in, the first
As shown in the figure, by closing the shells 7, 7 of the covering material 3, the joint portion of the joining conductor 2 is interposed in the jelly-like ultraviolet curable resin composition 5 filled inside the covering material 3.

At this time, a portion of the ultraviolet curable resin composition 5 corresponding to the volume of the joining conductor wire 2 is pushed away and moves in the direction shown by the arrow in FIG. Go in airtight.

Subsequently, at an arbitrary time, an ultraviolet ray irradiator is used to cure the ultraviolet curable resin 5 in the support 4 and apply the coating material 3 holding the bonding conductor 2 under irradiation conditions such that the joint portion of the bonding conductor 2 can be reliably sealed. The ultraviolet curable resin composition 5 filled in the support 4 of the coating material 3 is cured by irradiating ultraviolet rays from the outside, and the joint portion of the joining conductor wire 2 is covered.

When the shells 7, 7 of the support 4 of the covering material 3 are closed, the support 5.5 may be integrally fixed with staples 10, 10, as shown in FIG. S, for example.

Next, when using a foamy hot melt agent as the sealant 5, first heat and melt the solid hot melt agent, and then pour the gas-mixed hot melt agent into the support 4 under pressure using a gun. By discharging the hot melt agent 5, the gas is foamed and foamed (foamed) into the support 4 to form a coating material 3 as shown in FIG.

Therefore, while the hot-melt agent 5 of the sheathing material 3 is not yet hardened, the other shell 7 of the sheathing material 3 is opened as shown in FIG. The figure 7 joint is buried in the hot melt agent 5 in one shell 7,
As shown in FIG. 1, by closing the other shell 7, which serves as the lid of the support 4, the joint part of the joint conductor 2 is exposed to vacuum.
It is present in a foamy hot melt agent 5 filled inside the material 3.

At this time, an amount of hot melt agent 5 corresponding to the volume of the joining conductor wire 2 is pushed away, moves in the direction shown by the arrow in FIG. .

Then, when the foam-like hot melt agent 5 in the coating material 3 reaches room temperature, the hot melt agent 5 hardens and covers the joint portion of the joint conducting wire 2.

In addition, also in this case, the shells 7, 7 of the support body 4 of the covering material 3
When the support body 5 is closed, for example, as shown in FIG.
, 5 may be integrally fixed with staples 10, 10.

When a foamed hot melt agent is used, it has the following advantages (1) to (4) when compared with non-foamed hot melt agents and other sealants.

■ The heated foamy hot melt agent has a small heat capacity on the surface when it is discharged and filled into the support 4, so the support is easily affected by temperature (for example, a support with a thin film wall thickness). Even when applied to a substrate, thermal deformation of the support does not occur.

Therefore, a support that can be easily obtained in large quantities by vacuum forming or the like can be used rather than an inexpensive plastic film.

@ Foamy hot-melt agents exhibit high thixotropic properties, so they do not easily cause natural cross-flow and do not sag.

Therefore, it is possible to apply the hot-melt agent inward even on the peripheral edge of the support, and as a result, when a shell-type support is used, when closing the shell-type support, a sufficient amount of the hot melt agent can be applied to the support. 4, and a high sealing performance can be obtained. ■ The shell-shaped support 4 filled with heated foamy hot melt must be lifted and moved with 9 hands, or tilted slightly. Since the foamy hot melt does not leak out under any circumstances, the sealing effect is ensured and workability is also good.

■ Shell type support 4 filled with foamy hot melt agent
When closing a hot-melt material, it must be closed before the surface of the hot-melt material cools and solidifies. However, unlike non-foamed hot-melt materials, each foam of a foamy hot-melt material covers approximately 11, the heat dissipation is delayed, the open time is extended, and the handling of the bonding work is facilitated.

■ Non-formed hot melt cannot be filled by piling it up, and the liquid level is lower than one edge of the opening of the shell-type support 4, so when the support 4 is closed, there is no space inside. arise. In this respect, the foamy hot melt agent can be piled up on the shell type support 4 and filled with a sufficient amount of the hot melt agent to ensure reliable sealing.

(2) The foam-like hot-melt agent filled in the shell-type support 4 is foam-like when the support 4 is open, so it does not cool easily and does not harden rapidly. However, when the support body 4 is closed, each form is destroyed by an external force at that time, so the bonding area increases, heat is rapidly radiated, and the set time is shortened. This means long open hours.
Particularly when using a support having a joint surface, it is suitable for the work condition of short set time.

(2) When the shell-shaped support 4 filled with foamy hot-melt agent is closed, the adhesive layer becomes thinner at the adhesive surfaces between the ends of the shells, improving the finishing accuracy.

■ Foamy hot-melt agents have a lower apparent viscosity than non-foamed ones, so less force is required to close the support, and it can smoothly enter the gaps between bonding lines with less force. In addition, the excess foamy hot melt agent extruded from the contact gap between the end of the shell and the conductor does not drip and solidifies instantly in place, so there is extremely little risk of damage to parts or the work area. .

■ Foamy hot melt agent exhibits elasticity after cooling and assimilation7
This is because the fine bubbles remain as bubbles and have elasticity, so they act as a covering material that has resilience even when pressure is applied, and has the effect of protecting the internal joints from external impacts. be.

FIG. 10 is a perspective view showing another example of the support for the covering material 3. FIG. This support 14 has the same structure as the support 4 described above, and has protrusions 7a on corresponding parts of the surfaces of the shells 7, 7.
, 7a and recesses 7b, 7b are formed, respectively, so that when the shells 7, 7 are closed, the protrusion 7a+7a fits into the recesses 7b, 7b and is locked in the closed state.

In this way, by providing a locking mechanism in the shell of the support that has a shell structure so that the shell is locked in the closed state when the support is closed, the shell of the support can be temporarily closed. It is easy to stop, provides a good upper surface for storing the covering material, and, for example, when using an ultraviolet curable resin, it prevents movement of the connecting member even if the ultraviolet curable resin composition filled inside is not cured. Work and handling become easier.

FIG. 11 is a perspective view of a covering material of a connecting member showing a second embodiment of the present invention.

This bonding wire 21 includes a plurality of conductive wires W1 to W3.
The joint portion of the joint conducting wire 2 formed by joining the two is covered with a covering material 23.

This covering material 23 is attached to a support 24 as shown in FIG.
A sealant 25 is filled inside.

The support body 24 is made of a plastic molded product made by extruding a plastic sheet such as polypropylene, and as shown in FIG. A slit portion 15 for fitting or filling with a sealant 25 is formed.

In addition, this support body 24 may be one in which the slit portion 15 is formed by cutting the side portion of the cylindrical body 26 in the axial direction to form the slit portion 15 by the expansion force of the cylinder body 2B. Further, the shape of the slit portion 15 is not particularly limited as long as it can introduce the connecting member into the support body 24 and retain the sealant 25 within the support body 24.

As the sealant 25, for example, a jelly-like ultraviolet curable resin composition or a foam-like hot melt agent can be used, as in the first embodiment.

Note that when an ultraviolet curing resin is used as the sealant 25, the support body 24 is formed of a material that can transmit ultraviolet rays.

A method of manufacturing the bonding wire 21 by covering the bonded portion of the bonded conducting wire 2 using the coating material 23 will be described. In addition,
The same drawings will be referred to for both cases where an ultraviolet curing resin is used as the sealant 25 and a case where a foamy hot melt agent is used.

First, when using a jelly-like ultraviolet curable resin as a sealant, the support 24 is filled with a jelly-like ultraviolet curable resin composition 25 as a sealant and coated as shown in FIG. A material 23 is formed.

Then, at an arbitrary time when the joint part of the joint conductor 2 is coated,
Similarly to the case shown in FIG. 11, a jelly-like structure is formed in which the inside of the covering material 23 is filled with the Y-shaped joint of the joining conductor 2 as shown in FIG. embedded in the ultraviolet curable resin composition 25.

. Following the rumor, the jelly-like ultraviolet curable resin composition 2 in the support 24 is heated using an ultraviolet irradiator at any time.
The coating material 23 holding the bonding conductor 2 is irradiated with ultraviolet rays from the outside under irradiation conditions that allow the bonding conductor 2 to be cured and the connecting portion of the bonding conductor 2 to be reliably sealed. The ultraviolet curable resin composition 25 is cured to cover the joint portion of the joint conducting wire 2.

Next, when using a foamy hot melt agent as a sealant, first heat and melt the solid hot melt agent, and then apply the gas-mixed hot melt agent under pressure to the support of the coating material 23 using a gun. By discharging into the hot melt agent 24, the gas is foamed and formed into a foam.
is filled into the support body 24 to form a covering material 23 as shown in FIG.

Therefore, until the hot melt agent 25 of the coating material 23 hardens, the slit portion 15 of the support 24 of the coating material 23 is
Then, the Y-shaped joint portion of the joining wire 2 is interposed in a foamy hot melt agent 25 filled inside the covering material 23.

Then, when the foam-like hot melt agent 25 in the coating material 23 returns to room temperature, the hot melt agent 25 hardens and covers the joint portion of the joining conductor wire 2 .

In this way, when the slitted cylindrical support 12 is used to fill the hot melt agent in the form of a foam, there is no need to close the support unlike in the case of a support with a shell structure. Immediately after filling the inside with the agent 25, the connection portion of the joining conductor is pushed into the hot melt agent 25 through the slit portion 15, and the hot melt agent 25 is allowed to cool and solidify to form a sealing coating, which further improves workability. . This method is particularly suitable for connecting parts with relatively small wire diameters.

FIG. 14 is a front view showing another example of the support for this covering material 23.

This support body 34 is formed by making a single incision in the axial direction of the cylindrical body 36, as shown in FIG.
A ring 39 is fitted around the outer periphery of the ring to form a slit portion 27 by engaging the cut end and expanding it.

This support 34 can be removed from the first ring by removing the third ring.
As shown in FIG. 6, the cylindrical body 36 closes itself due to the restoring force and closes the slit portion 27. Therefore, by removing the ring 3S after burying the bonded portion of the bonded wire in the sealant in the support body 34, the slit portion 27 is closed and the sealant is retained inside, which further improves workability. , the ring 38 can also be attached to the tool side.

As described above, since the coating material used in the present invention covers the joints of the joint wires, the inside of the support is filled with a sealant, so the joints of the joint wires are interposed in the sealant inside the coating material. By curing the sealant after this, the joint portion of the joint member is covered. Therefore, the work of covering the joint is simplified and the joint is reliably sealed.

In other words, when covering the joints of jointed wires such as lead wires, the required functions differ somewhat depending on the use of the wire, etc., but basically: When there are a large number of tasks to be performed, it is inefficient if each task takes minutes or hours, so the task must be completed in seconds, preferably within 10 seconds; ■ Work proficiency is not required; ■ The electrical insulation properties of the sheathing material are comparable to those of the vinyl sheathing material, ■ It has excellent adhesion to the conductor sheathing material, ■ It has excellent heat resistance and cold resistance, ■ It must be resistant to human or machine damage. Although it is required that the sealant filled in the support does not flow out even when handled with tools, the coating material of the present invention
This fully satisfies these requirements.

Examples of the bonded wire material of the present invention include electric wires, conducting wires such as lead wires, automobile wire harnesses, joints between control panels and conducting wires of electrical equipment, cables for plants, optical fiber cables, piping, etc. can be mentioned.

Note that the support constituting the coating material used in the present invention does not necessarily have to be transparent, but as described above, if the sealant filled inside the support is an ultraviolet curable resin, the support The body can be made of a material that allows ultraviolet rays to pass through. A transparent body with excellent permeability is preferred because it can reliably cure the ultraviolet curable resin composition in a short time.

The shape of the support is not limited to that of the above example, but it should have a structure that holds the sealant inside, prevents the connecting member inserted therein from falling off, and allows it to pass through narrow spaces and holes. It is preferable that there be.

In addition, the sealant is not limited to the jelly-like ultraviolet curable resin composition and the foam-like hot melt agent described above, and in some cases, a hot melt resin or a liquid photocurable resin may be used. can.

Next, specific examples of the present invention will be described.

Example 1 A support material was filled with an ultraviolet curable resin composition to form a coating material for a bonded wire. The method for preparing the support and the ultraviolet curable resin composition is as follows.

(Support) A shell-shaped support 4 as shown in FIG. 4 was molded from a polypropylene sheet (manufactured by Dainippon Ink and Chemicals Co., Ltd.) having a thickness of 0.8 nn using a vacuum forming method. Note that the polypropylene used contained no ultraviolet absorber in its components.

(Ultraviolet curable resin) An ultraviolet curable resin composition was prepared as sealant 5 using the following components and blending ratios.

Bisphenol A type epoxy resin (Cyracure UV
R-6405, U, C, product name manufactured by C company)... 60-fold alicyclic epoxy resin (Silacure UV I-6110
, U, C, C (product name)...40 parts by weight allyl sulfonium salt (Cyracure UVl-6974,
(Product name manufactured by U, C, C)...0.8 parts by weight Siloxane compound (KBM 703. Part name manufactured by Shin-Etsu Chemical Co., Ltd.)...4 parts by weight Benzsorbitol derivative (Gelol D.

(trade name, manufactured by Shin Nippon Rika Co., Ltd.)...1.5 parts by weight. To obtain an ultraviolet curable resin composition, the components in the above proportions were homogeneously stirred and mixed at 90°C to 100°C for 15 minutes or more. .

(Formation of coating material) The ultraviolet curable resin composition 5 was heated at a temperature of 90°C to 100°C for about 1. ．． 5 g (approximately 1.36 cc) is filled into the recess 8 of each shell 7, 7 of the support 4, and left to cool to room temperature to turn the ultraviolet curable resin composition 5 into a jelly, forming the coating material 3. did. Note that the ultraviolet curable resin composition may be forcibly cooled to form a jelly.

(Embedding of the bonding conductive wire) Next, the bonding conductive wire was buried in the covering material 1 obtained in 1- as described below.

As a connecting member, conductor wire ("1'R-64X10 type.

A bonded conductor wire made by Shinjo Electric Wire Co., Ltd. (trade name) was used. Approximately ioam of the polyvinyl chloride coating layer at the tips of the two conductive wires is removed, and the bare wire parts are joined together by soldering or coulometric heat welding to form a figure-7 joint as shown in Figure 2. A joining groove 1lfA2 was obtained.

After the 7-shaped joint of the joining conductor 2 is buried in the jelly-like ultraviolet curable resin composition 5 filled in one shell 7 of the support 4 of the covering material 3, it becomes the lid of the support 4. The other shell 7
is closed, the 7-shaped joint of the joining conductor 2 is interposed in the jelly-like ultraviolet curable resin composition 5, and an area of the ultraviolet curable resin composition 5 corresponding to the volume of the joining conductor 2 is pushed away. It was moved in the direction shown by the arrow in FIG. 8, and entered into the gap between the joining conductive wires 2.

At this time, as shown in FIG. 3, the two shells 7, 7 of the support 4 were closed and fixed at two locations with copper staples 5L-10.

Subsequently, the covering material 3 holding the bonding conductive wire 2 is irradiated with ultraviolet rays under the irradiation conditions shown in Table 1 using an ultraviolet irradiator (Model DHD-500CM, manufactured by Oak Co., Ltd.) to support the covering material 3. The ultraviolet curable resin composition 5 filled in the body 4 was cured.

The bonded wire 1 obtained by sealing the bonded portion of the bonded conductive wire 2 in Example 1 with the coating material 3 was subjected to the following evaluation test, and the results are shown in Table 1.

□Water stand base: The time required to coat the joint part of the joint conductor wire 2 was measured.

The tear strength of the joint of the bonded wire was measured using an Instron testing machine. In addition, the tensile speed in this test (
load) is 50 mm/m1ri.

Seal crossing; When embedding the joining conductor 2 in the covering material 3, the joining groove RI&2
Five grains of Hisipal A type (part name manufactured by Asahi Glass Co., Ltd.) (2+m diameter) as a spherical silica gel desiccant for packaging are fixed to the joint of the support body 4, and the shell body 7 which becomes the lid of the support body 4 is closed.
Apply coating treatment to the joint part as in Example 1 above,
A sealing test sample was prepared.

Subsequently, this sample was immersed in water at room temperature for 24 hours, and then the presence or absence of discoloration of the silica gel was checked. In this case, those in which the silica gel did not change color were considered to have some sealing properties, and those in which the silica gel changed in color were considered to have no sealing properties.

Uncut-4 The concave portion 8 of each shell 7.7 of the support 4 formed in the same manner as in Example 1 was filled with the ultraviolet curable resin composition 5 prepared as described below to form a coating material for the bonded wire. was formed.

Polygonal ray curable resin composition Finely powdered silica (Aerosil R-972, manufactured by Nippon Aerosil ■) was added as a gelling agent to an acrylic ultraviolet curable resin (TB3042C2n manufactured by Three Bond), and resin/gelling agent = 85/15. A jelly-like ultraviolet curable resin composition was obtained by blending in the following proportions.

Then, the 7-shaped joint portion of the joint conductor 2 similar to that in Example 1 was filled in the support 4 of the coating material 3 in the same manner as in Example 1 in the above-mentioned jelly-like ultraviolet curable resin composition 5. After that, the two shells 7, 7 of the support body 4 are fixed, and then the coating material 3 holding the bonding conductor wire 2 is irradiated with ultraviolet rays under the irradiation conditions shown in Table 1 to remove the coating material 3. The ultraviolet curable resin composition 5 filled in the support 4 was cured.

The bonded wire 1 obtained by sealing the bonded portion of the bonded conductive wire 2 with the covering material 3 obtained in Example 2 was subjected to the following evaluation test, and the results are shown in Table 1.

Example 3 Using the support 4 formed in the same manner as in Example 1 and the prepared ultraviolet curable resin composition, the four parts 8 of each shell 7, 7 of the support 4 were filled with the ultraviolet curable resin composition 5. did.

Thereafter, as in Example 1, the 7-shaped joint of the joint conductor 2 was buried in the jelly-like ultraviolet curable resin composition 5 filled in one shell 7 of the support 4. The ultraviolet curable resin composition 5 is applied before closing the other shell 7 which becomes the lid.
The surface of the support 4 was preliminarily irradiated with ultraviolet rays, and then the shell 7 serving as the lid of the support 4 was closed.

In addition, this preliminary irradiation with ultraviolet rays is important because in cationic polymerization type photopolymerization, the catalyst that has been irradiated with light is dissociated by a dark reaction, and then the reaction proceeds gradually in the dark. The light irradiation after closing the shell 7 promotes sufficient reaction of the ultraviolet curable resin composition in the bulge or inside.

Subsequently, the covering material 3 holding the bonding conductive wire 2 is irradiated with ultraviolet rays under the irradiation conditions shown in Table 1 using an ultraviolet irradiator (Model DHD-500CM, manufactured by Oak Co., Ltd.) to support the covering material 3. The ultraviolet curable resin composition 5 filled in the body 4 was cured.

The bonded wire 1 obtained by covering the bonded portion of the bonded conductive wire 2 obtained in Example 3 with the covering material 3 was subjected to the same evaluation test as in Example 1, and the results are shown in Table 1.

In the same way as in Comparative Example 1, as a bonding wire, approximately 10 mm of the polyvinyl chloride coating layer at the tips of two bonding conductors was removed, and the bare wire portions were bonded together by soldering, as shown in Fig. 2. A bonded conducting wire 2 having a 7-shaped bonded portion was formed.

Next, apply electrically insulating polyvinyl chloride adhesive tape (Nislon No., 360゜Tanesui Kagaku Kogyo) to the joint part of the joint conductor wire 2.
Co., Ltd., trade name) was rolled into six layers.

In Comparative Example 1, a bonded wire material obtained by wrapping an insulating tape around the joint portion of the bonded conductor wire 2 and sealing it was checked for workability and subjected to a sealability evaluation test in the same manner as in Example 1, and the results are shown in Table 1. It was shown to.

Table 1: Acupuncture I - A foamy hot-melt agent was filled into the inside of the support to form a covering material for the connecting member. The support, hot melt agent, coating method, and connecting member are as follows.

(Support) As in Example 1, a shell-shaped support 4 shown in FIG. Using.

(Hot melt agent) Ethylene vinyl acetate polymer as sealant 5; TB
X-36-122 (manufactured by Three Bond Co., Ltd., trade name) was used.

(Coating method) Foam hot melt agent dispensing device 1 yen (foam melt applicator FM151.N0RDSON, INC.
N2 gas is mixed into the hot melt agent using a hot melt agent (manufactured by , USA), and at a discharge temperature of 130°C and a foaming ratio of 1.5 times, approximately 1.6 ~1.7cc
The coating material 3 was formed by discharging and filling.

Next, a bonding conductive wire was embedded in the covering material 3 obtained in I-, as described below.

As a connecting member, the same conductive wire as in Example 1 (TR-64X1
A bonded conducting wire made by bonding Type 0 2 manufactured by Shinagawa Electric Wire Co., Ltd. (trade name) was used. Approximately 10m+ of the polyvinyl chloride coating layer at the tips of the two above-mentioned joining conductors is removed, and the bare wire parts are joined by soldering or electrothermal welding to form a figure 7 joint as shown in Figure 5. A bonded conductive wire 2 was formed.

After embedding the 7-shaped joint of the joint conductor 2 in the foam-like hot melt agent 3 filled in one shell 7 of the support 4, the other shell 7, which will become the lid of the support 4, is embedded. It was designed to fit into the gap between the closed joint conductor wires 2.

Comparative Example 2 A non-foamed hot melt agent (the same heat melted hot melt agent as in Example 3, but not foamed) was added to the support 4.
After filling the inside, the figure 7-shaped joining conductor 2 similar to Example 1
After embedding the joint in a hot melt agent filled in one shell 7 of the support 4, the other shell 7, which will become the lid of the support 4, is closed, and the hot melt is cooled to room temperature. The agent was cured.

Regarding the coating material 3 in Example 4 and Comparative Example 2, workability confirmation 1 Mechanical strength measurement (Comparative Example 2)
(excluding 20%), evaluation tests were conducted to determine the presence or absence of sealing properties and the presence or absence of fluidity in the protruding portion, and the results are shown in Table 2.

Table 2 (Effects of the Invention) As explained above, according to the present invention, since the joint portion is covered with the covering material formed by filling the support with a sealant, the sealant of the covering material joins the joining wire. It has excellent airtightness, has excellent sealing properties, and can provide complete waterproof protection for the joints of bonded wires. For example, it can be used to connect conductor wires that make up a wire harness. When used in a section, the number of wires to be routed is reduced, resulting in weight reduction and effective use of space. In addition, it has high mechanical strength, can provide excellent binding strength, and has improved weather resistance and insulation properties. Furthermore, it is possible to seal and cover the joints of the joint wires at speeds of seconds, improving work efficiency.

In addition, when a jelly-like ultraviolet curable resin is used as a sealant for the coating material, it can be used even in high-temperature atmospheres of around 120°C, has a long open time, and does not leak even when filled into the support, making it easier to work. Improves sex. Furthermore, when a foam hot melt agent is used as a sealant, it is more economical and requires no special tools other than a foam hot melt dispensing device, so it can be used in various shapes and shapes.
Can be applied to the connection part of the 4' method and does not require temporary fixing 7

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a joint portion of a joint wire according to a first embodiment of the present invention, FIG. 2 is a plan view showing the joint conductor, and FIG. 4 to 6 are respectively a perspective view, a plan view, and a front view of the support, FIGS. 7 to 3 are perspective views for explaining the method of covering the connecting member with the covering material, and FIG. 10. is a perspective view showing another example of the support, FIG. 11 is a perspective view showing the joint portion of the joining wire showing the second embodiment of the present invention, and FIG. 12 is a perspective view showing the covering material. 1st
3 is a perspective view showing the support, and FIGS. 14 to 16 are front views showing other examples of the support, and side sectional views showing different states of the support. 1.21...Joining wire 2...Joining conductor wire 3.
23...'61 material 4.14, 24.34...Support 5.25...Sealant Applicant Three Bond Door Co., Ltd. 2L S S F"" No□ Kootomataka 5j Blade No. 6 Figure 7 θ 7 Atsushi 10 mouths 11 figures 712 times 13 holes

Claims (1)

[Scope of Claims] 1. A bonded wire formed by bonding a plurality of wires and covering the bonded portion with a coating material, characterized in that the coating material holds a sealant inside the support. Joined wire. 2. The bonding wire according to claim 1, wherein the sealant of the covering material is an ultraviolet curable resin, and the support is a plastic molding that can transmit ultraviolet rays. 3. The bonded wire according to claim 1, wherein the sealant of the covering material is a hot melt agent, and the support is a plastic molded product. 4. The bonded wire according to any one of claims 1 to 3, wherein the support of the covering material has a shell structure. 5. The bonded wire according to any one of claims 1 to 3, wherein the support of the covering material is a cylindrical body with a slit formed therein. 6. In a method for manufacturing a bonded wire rod in which a plurality of wire rods are bonded and the bonded portion is covered with a coating material to produce a bonded wire rod, the coating material is formed by filling a sealant inside a support, and the bonded wire rod is A method for manufacturing a bonded wire, which comprises interposing the bonded portion in a sealant inside the coating material, and then curing the sealant. 7 The coating material is made by filling a support made of an ultraviolet-transparent plastic molding with a sealing agent made of a jelly-like ultraviolet curable resin composition, and the joint part of the bonding wire is sealed in the sealing agent inside the coating material. 7. The method of manufacturing a bonded wire rod according to claim 6, wherein the sealant is cured by irradiating the coating material with ultraviolet rays after the sealant is interposed therein. 8. The covering material is formed by filling a sealant made of a foamy hot melt agent inside a support made of a plastic molded product,
7. The method of manufacturing a bonded wire according to claim 6, wherein the sealant is cured after the bonded portion of the bonded wire is interposed in the sealant inside the coating material. 9. The method for manufacturing a bonded wire according to any one of claims 6 to 8, wherein the support of the covering material has a shell structure. 10. The method for manufacturing a bonded wire rod according to any one of claims 6 to 8, wherein the support of the covering material is a cylindrical body with slits formed therein.