JPH0447432B2 - - Google Patents

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 connection device for a bonded wire in which a bonded portion is covered with a covering material. [Prior art] For example, automotive wiring harnesses include main harnesses, side harnesses, engine subharnesses, rear harnesses, door harnesses, instrument harnesses, etc. These wiring harnesses include many conductive wires as wire materials. It is constructed by joining and connecting. This bonded conductor can be made by, for example, removing the insulating coating from each conductor to be bonded to leave it in a bare wire state, then bringing the bare wire portions into contact with each other and bonding using a metal bonding terminal, or by directly placing the wire in a hot state. They are connected by fusion welding. In order to prevent metal corrosion caused by water intrusion or salt damage into the joint, which could lead to poor electrical connection or disconnection, the joint and its vicinity should be protected. Protected by covering material. Examples of conventional bonded wire rods and methods for manufacturing the same include the following. Using insulating vinyl tape as a covering material,
Wrap this insulating vinyl tape around the joint. 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 connecting portion to seal the joint. b; Form into a sheet and heat-press the bonded portion. c; Seal by injecting a heat-meltable resin into the container into which the joint is inserted. A heat-shrinkable tube is used as the covering material, and after the connecting portion is passed through the heat-shrinkable tube, 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 methods for manufacturing the same have the following drawbacks. When wrapping tape around the joint of the wire,
If the tape is wrapped with a considerable amount of tension, there will be gaps between the tape laps, which will result in poor sealing.Also, if such work is done manually, it will be time consuming and reduce productivity. The winding process is difficult and requires skill. a; Extrusion molding machines and the like are required, which increases the size of the equipment, and since thermoplastic resins can only be handled in solid form once they reach room temperature, it is not possible to proceed to the next step until the temperature reaches room temperature. b: Poor followability and poor adhesion to the joint, resulting in an incomplete seal and water infiltration. c: The joint is 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.
In addition, once both ends of the bonded wire are 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 bonded wires and connection failures and disconnections due to salt damage, it is necessary to The harness is routed up to the point where the joint is placed inside the vehicle. However, in this case, wiring the harness takes time, the harness becomes long and heavy, and it becomes necessary to secure a large space for the harness, which increases cost. [Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems, and provides a joint wire connecting device in which a plurality of wire rods are joined and the joint portion is covered with a covering material. ,
The coating material holds a sealant solidified in the form of jelly inside a support made of a plastic molding that can transmit ultraviolet rays, and this sealant contains acyl amino acid derivatives, sorbitol derivatives, organic bentonite, silica powder, hydrogenated The present invention is a connection device for joining wires, characterized in that it is an ultraviolet curable resin composition solidified into a brittle jelly with a gelling agent selected from the group of castor oils. [Function] The coating material that covers the joints of the joint wires has a sealant made of an ultraviolet curable resin composition solidified in the form of jelly held inside the support. The sealing agent is placed in the internal sealing agent and irradiated with ultraviolet rays to cure the sealing agent, thereby covering the joint portion of the joining wire. Therefore, the work of covering the joint is simplified and the joint is reliably sealed. [Examples] Examples 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 rod 1 includes a conductor wire W1 which is a plurality of wire rods.
The joint portion of the joint conductive wire 2 formed by joining the wires W3 to W3 is covered with a covering material 3. As shown in FIG. 2, the bonding conductive wire 2 is made by removing the insulation coatings of the three conductive wires W1 to W3 to make them bare wires, and then connecting the conductive wire W1 to the conductor W1.
The bare wire portion of the wire and each bare wire portion of the conducting wires W2 and 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, The Y-shaped joint portion of the joint conducting wire 2 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, 7 integrally formed so as to be openable and closable. shell)
Each shell 7 has a recess 8 (numerals are attached to the outside for convenience in FIGS. 3, 5, and 6) for filling the sealant 5, and A notch is made in a part of the body 7 to form a bending part 9 which is bent when the joining wire is sandwiched. As the sealant 5, an ultraviolet curable resin composition solidified into a jelly form is used. At this time, the support 4 is made of a material that can transmit ultraviolet rays. This UV-curable resin is a UV-curable resin composition solidified into a brittle jelly with a gelling agent selected from the group of acyl amino acid derivatives, sorbitol derivatives, organic bentonite, silica powder, and hydrogenated castor oil. It is a thing. This ultraviolet curable resin can be solidified into a jelly-like state and maintained at least until it is cured after being filled into the support to an extent that it does not flow out of the support. To solidify ultraviolet curable resin into jelly,
A gelling agent is added to the ultraviolet curable resin. Examples of the gelling agent include acylamino acid derivatives, sorbitol derivatives, organic bentonite, 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, dicapryloyl lysine laurylamide, dicapryloyl lysine lauryl amine salt, and dicaproyl lysine lauryl. Examples include ester, lauroylvaline butyramide, lauroylphenylalanine laurylamide, lauroylphenylalanine laurylamine salt, and among these, lauroylglutamic acid dibutylamide is preferred. Further, examples of sorbitol derivatives include dibenzylidene sorbitol, benzylidene hydroxybenzylidene sorbitol, and the like. The blending ratio of the gelling agent needs to be such that the ultraviolet curable resin solidifies into a jelly-like state 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 an ultraviolet curable resin of an acylamino acid derivative or a sorbitol derivative 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. A method for manufacturing the bonded wire 1 by coating the bonded portion of the bonded conducting wire 2 using the coating material 3 will be described. First, the sealant 5 is an ultraviolet curable resin, and the support 4 is filled with a jelly-like ultraviolet curable resin composition as a sealant to form the covering material 3 as shown in FIG. At any time when the joint of the joint conductor 2 is to be coated, as shown in FIG. After burying it in the ultraviolet curable resin composition 3 in one shell 7 of 4, as shown in FIG.
By closing the shells 7, 7 of the covering material 3, the joint portion of the joining conductor wire 2 is interposed in the ultraviolet curable resin composition 5 filled in the covering material 3 and solidified into a jelly-like form. At this time, an amount of the ultraviolet curable resin composition 5 corresponding to the volume of the joining conductor wire 2 is pushed away and moved in the direction shown by the arrow in FIG. into hermetically. Subsequently, at an arbitrary time, the coating material 3 holding the bonding conductor 2 is heated using an ultraviolet irradiation machine under irradiation conditions such that the ultraviolet curable resin in the support body 4 is cured and the joint portion of the bonding conductor 2 is 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. Note that when the shells 7, 7 of the support 4 of the covering material 3 are closed, the supports 5, 5 may be integrally fixed with staples 10, 10, as shown in FIG. 9, for example. good. FIG. 10 is a perspective view showing another example of the support for the covering material 3. FIG. In addition to having the same structure as the support 4 described above, this support 14 has protrusions 7a, 7a and recesses 7b, 7b formed in corresponding parts of the surfaces of the shells 7, 7, respectively. Convex part 7 when closed
a, 7a are fitted into the recesses 7b, 7b to be locked in the closed state. In this way, by providing a locking mechanism on the shell of the support having a shell structure so that the shell is locked in the closed state when the support is closed,
It is easy to temporarily close the shell of the support, which is convenient for preserving the covering material, and allows for operations such as moving and handling of the connecting member even if the ultraviolet curable resin composition filled inside is not cured. becomes 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 is a conductive wire W which is a plurality of wires.
The joint portion of the joint conductor 2 formed by joining the wires 1 to W3 is covered with a covering material 23. As shown in FIG. 12, this covering material 23 is made by filling a support 24 with a sealant 25.
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 filling with a container or a sealant 25 is formed. Note that 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 so that the slit portion 15 is formed by the expansion force of the cylinder body 26. Further, the shape of the slit portion 15 is similar to that of the support body 24.
There are no particular limitations, as long as the shape allows the connection member to be introduced therein and the sealant 25 can be held within the support body 24. As the sealant 25, an ultraviolet curable resin composition solidified into a jelly is used as in the first embodiment. Note that at this time, the support body 24 is formed of a material that can transmit ultraviolet rays. A method for manufacturing the bonded wire 21 by coating the bonded portion of the bonded conducting wire 2 using the coating material 23 will be described. First, an ultraviolet curable resin solidified into a jelly-like form is used as a sealant, and this ultraviolet curable resin composition 25 is filled into a support 24 to form a coating 23 as shown in FIG. 12. Then, at any time when the joint part of the joint conductor 2 is coated, the joint conductor 2, for example, as shown in FIG. The Y-shaped joint is embedded in the ultraviolet curable resin composition 25 filled in the coating material 23 and solidified into a jelly-like form. Subsequently, at an arbitrary time, using an ultraviolet irradiation machine, the ultraviolet curable resin composition 25 solidified into a jelly within the support body 24 is cured and bonded under irradiation conditions that can reliably seal the connecting portion of the bonding conductor 2. UV curable resin composition 25 filled in support 24 of covering material 23 and solidified into jelly is further cured by irradiating ultraviolet rays from the outside of covering material 23 holding conductor wire 2;
The joint portion of the joint conducting wire 2 is coated. FIG. 14 is a front view showing another example of the support for the covering material 23. This support body 34 is formed by making a single notch in the axial direction of the cylindrical body 36, and holding the cut end on the outer periphery of the cylindrical body 26 and expanding it, as shown in FIG. A ring 39 that forms the slit portion 27 is inserted therein. When the ring 39 is removed from the support body 34, the cylindrical body 36 closes itself by restoring force to close the slit portion 27, as shown in FIG. Therefore, by removing the ring 39 after burying the joint of the bonded wire in the sealing material in the support body 34, the slit portion 27 is closed and the sealing material is retained inside, which improves work efficiency. improves. In addition, ring 39
can also be attached to the tool side. As described above, since the support is filled with a sealant in the coating material that covers the joints of the joint wires used in the present invention, the joints of the joint wires are covered with the sealant inside the coating material. By curing the sealant after intervening, 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 lead wires and other bonded wires, the required functions differ somewhat depending on the use of the wire, but basically the covering work must be completed in a short time. When there are many work areas and a large number of work pieces, it is inefficient if each work takes minutes or hours, so it is necessary to be able to complete the work in seconds, preferably within 10 seconds, and to be highly skilled in the work. The electrical insulation properties of the sheathing material are comparable to those of vinyl sheathing. The adhesion of the conductor to the sheathing material is excellent. It has excellent heat resistance and cold resistance. It must be resistant to human or mechanical tools. The coating material of the present invention fully satisfies these requirements. Examples of the bonded wire of the present invention include electric wires, conducting wires such as leait 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 may be formed of a material through which ultraviolet rays can pass. A transparent body with excellent permeability is preferable because the ultraviolet curable resin composition can be cured in a short time and reliably. 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. Next, specific examples of the present invention will be described. Example 1 An ultraviolet curable resin composition was filled inside a support 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 polypropylene sheet (manufactured by Dainippon Ink and Chemicals Co., Ltd.) having a thickness of 0.8 mm was molded into a shell-shaped support 4 as shown in FIG. 4 by vacuum forming.
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 (Cylaquiure UVR-6405, product name manufactured by UCC)
...60 parts by weight ●Alicyclic epoxy resin (Cylaquiure UVI-
6110, UCC product name)...40 parts by weight
UVI-6974, UCC product name) ...0.8 parts by weight Siloxane compound (KBM703, Shin-Etsu Chemical Co., Ltd.)
Co., Ltd. (product name)...4 parts by weight Benzsorbitol derivative (Gelol D, New Japan Chemical Co., Ltd. product name)...1.5 parts by weight In order to obtain an ultraviolet curable resin composition, the ingredients in the above blending ratios The mixture was homogeneously stirred and mixed at 90°C to 100°C for 15 minutes or more. (Formation of coating material) About 1.5 g (about 1.36 cc) of the ultraviolet curable resin composition 5 is filled into the recess 8 of each shell 7, 7 of the support 4 at a temperature of 90°C to 100°C. The coating material 3 was formed by being left to stand until the temperature reached room temperature and solidifying into a jelly-like state. 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 above as described below. As a connecting member, a bonded conducting wire in which conducting wires (TR-64×10 type, manufactured by Shinagawa Electric Wire Co., Ltd., trade name) were bonded was used. Remove approximately 10 mm of the polyvinyl chloride coating layer at the tips of the two conductive wires, and join the bare wire parts together by soldering or electrothermal welding to form a Y-shaped joint as shown in Figure 2. A bonded conducting wire 2 was obtained. After burying the Y-shaped joint of the joining conductor 2 in the ultraviolet curable resin composition 5 solidified into a jelly which is filled in one shell 7 of the support 4 of the covering material 3, the lid of the support 4 is buried. The other shell 7 is closed, and the Y-shaped joint of the joining conductor 2 is interposed in the ultraviolet curable resin composition 5 solidified into a jelly, and an amount of UV curable resin corresponding to the volume of the joining conductor 2 is applied. Resin composition 5
was pushed away and moved in the direction shown by the arrow in FIG. 8, so that it entered the space between the connecting conductors 2. At this time, the two shells 7, 7 of the support body 4 are
As shown in the figure, the two locations were closed and fixed using copper staples SL-10. Subsequently, a first
Under the irradiation conditions shown in the table, the ultraviolet irradiator (DHD-
The ultraviolet curable resin composition 5 filled in the support 4 of the coating material 3 was cured by irradiating it with ultraviolet rays using a 500CM model (manufactured by Oak Co., Ltd.). The bonded wire 1 obtained by sealing the bonded portion of the bonded conductive wire 2 in Example 1 with the covering material 3 was subjected to the following evaluation test, and the results are shown in Table 1. Confirmation of workability: The time required to coat the joint portion of the joint conductor wire 2 was measured. Mechanical strength measurement: The tear strength of the joint of the bonded wire was measured using an Instron testing machine. Note that the tensile strength (load) in this test was 50 mm/min. Sealing property test: When embedding the bonding conductor 2 in the covering material 3, a spherical silica gel desiccant of type A (trade name manufactured by Asahi Glass Co., Ltd.) (2 mm
A shell body 7 which fixes five grains (diameter) and serves as a lid part of the support body 4.
was closed and the joint portion of the joint conducting wire 2 was coated as in Example 1 above to prepare a sealing test sample. 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 sufficient sealing properties, and those in which the silica gel changed in color were considered to have no sealing properties. Example 2 The recess 8 of each shell 7, 7 of the support 4 formed in the same manner as in Example 1 was filled with an ultraviolet curable resin composition 5 prepared as below to form a coating material for the bonded wire. did. UV curable resin composition Acrylic UV curable resin (TB3042C, Co., Ltd.)
(manufactured by Three Bond) and fine powdered silica (Aerosil R-972, manufactured by Nippon Aerosil Co., Ltd.) as a gelling agent.
A jelly-like ultraviolet curable resin composition was obtained by blending at a blending ratio of resin/gelling agent = 85/15. Then, the Y-shaped joint portion of the joint conducting wire 2 similar to that in Example 1 was filled into the support 4 of the coating material 3 in the same manner as in Example 1, and the ultraviolet curable resin composition solidified into a jelly form was used. 5, the two shell parts 7, 7 of the support 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. The ultraviolet curable resin composition 5 filled in the support 4 of No. 3 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 recess 8 of each shell 7, 7 of the support 4 was filled with the ultraviolet curable resin composition 5. did. Thereafter, as in Example 1, the Y-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. Before closing the other shell 7 that will become the lid, the surface of the ultraviolet curable resin composition 5 is pre-irradiated with ultraviolet rays, and then the shell 7 that will become the lid of the support 4 is closed.
closed. Note that this preliminary irradiation with ultraviolet rays, in the case of cationic polymerization-based photopolymerization, causes a dark reaction in which the irradiated catalyst dissociates, and then the reaction gradually progresses in the dark, so that it becomes the lid of the support 4. Light irradiation after the shell 7 is closed promotes sufficient reaction of the ultraviolet curable resin composition in the shadow area or inside. Subsequently, a first
Under the irradiation conditions shown in the table, the ultraviolet irradiator (DHD-
The ultraviolet curable resin composition 5 filled in the support 4 of the coating material 3 was cured by irradiating it with ultraviolet rays using a 500CM model (manufactured by Oak Co., Ltd.). 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 were evaluated in the first example.
Shown in the table. Comparative Example 1 Similar to 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 was formed with a Y-shaped bonded portion. Subsequently, electrically insulating polyvinyl chloride adhesive tape (Eslon No. 360, manufactured by Sekisui Chemical Co., Ltd., trade name) was wrapped in six layers around the joint portion of the joint conducting wire 2. 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.

〔Effect of the invention〕

As explained above, according to the present invention, since the joint portion is covered with the covering material made by filling the support with a sealing agent, the sealing material of the covering material follows the joint portion of the joining wire material to ensure sufficient adhesion. It has excellent airtightness, improves sealing performance, and can completely protect the joints of bonded wires from water.For example, when used for the connection of conductors that make up a wire harness, There is less routing, etc., resulting in weight reduction and effective use of space. In addition, it has high mechanical strength and can obtain excellent binding strength.
Weather resistance and insulation properties are improved. Furthermore, it is possible to seal and cover the joints of the joint wires in seconds, improving work efficiency. In addition, since UV-curable resin solidified into jelly is used as a sealant for the coating material, it can be heated up to 120°C.
It can be used even in moderately high temperature atmospheres, has a long open time, and does not flow out even when filled into a support, improving workability.

[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 9 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. FIG. 13 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, 3,
23...Covering material, 4,14,24,34...Support, 5,25...Sealing agent.

Claims (1)

[Claims] 1. In a joint wire connecting device in which a plurality of wire rods are joined and the joint portion is covered with a coating material, the coating material is solidified in a jelly-like form inside a support made of a plastic molding that can transmit ultraviolet rays. This sealant is solidified into a brittle jelly by a gelling agent selected from the group of acyl amino acid derivatives, sorbitol derivatives, organic bentonite, silica powder, and hydrogenated castor oil. A connecting device for joining wires, characterized by being made of a curable resin composition.