JP2013081341A - Terminal cap and terminal treatment method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal cap which easily performs terminal treatment with excellent waterproofness and prevents falling from a terminal, and to provide a terminal treatment method which easily provides waterproofness to the terminal of an insulative coating electric wire and maintains the waterproofness effect for a long time.SOLUTION: A terminal cap fits onto a terminal of an insulative coating electric wire where a conductor is exposed so as to cover the conductor, and includes a bottomed cylindrical cap body where the terminal is housed. A curable liquid adhesive is housed in the cap body so as to adhere and fix an inner surface of the cap body to the terminal after the terminal is housed.

Description

  The present invention provides a terminal cap that is used by being fitted on the end of an insulation-coated electric wire with an exposed conductor so as to cover the conductor, and a terminal cap of the insulation-coated electric wire with an exposed conductor. The present invention relates to a terminal processing method for externally fitting a terminal cap.

Conventionally, an insulated wire such as a power cable manufactured by a cable maker is cut to a predetermined length and wound on a drum before being shipped to a user.
Insulated coated wires may be stored outdoors during storage before shipment by cable manufacturers or use by users, so rainwater etc. is prevented from entering from the cut end face where the conductor is exposed. Therefore, the terminal process which carries out the outer fitting of the bottomed cylindrical terminal cap which can accommodate the terminal of this insulated wire to the said terminal is implemented at the time of carving.

Moreover, the terminal treatment of the insulation-coated electric wire is performed not only when the insulation-coated electric wire is separated but also during actual use.
For example, when connecting two insulated wires with a small conductor size, such as those used for indoor wiring, strip the insulation coating at each end to expose the conductors from several mm to several tens of mm. A method of twisting and soldering, a method of inserting these two conductors from one opening of the crimping sleeve, and caulking the crimping sleeve with a crimping tool in this state are adopted. To this connected part In order to prevent an electric shock or a leakage due to the contact of the terminal, a terminal process is performed in which a terminal cap is covered with a terminal cap to provide insulation.

In these terminal treatments, the purpose is lost if water enters from the outside through the gap between the terminal cap and the insulation-coated wire, or the terminal cap falls off and the conductor gets wet. Because of this, a plastic tape is wrapped around the open end of the terminal cap that is externally fitted to the terminal to close the gap with the insulated wire, and the terminal cap is prevented from falling off. The cover is covered with vinyl tape.
However, enforcing such a terminal processing method requires a great deal of labor and may require complicated operations.
In addition, it is practically impossible to perform waterproofing by inserting a waterproof putty into the gap between the wires in an insulation-coated electric wire or the like in which an insulation conductor is formed on an assembly conductor formed by twisting a plurality of wires. Therefore, if water is infiltrated even a little, this water may infiltrate deeply into the insulated wire through the wires.

  On the other hand, for example, Patent Document 1 below describes a terminal cap having a bottomed cylindrical cap body made of a material such as rubber having elasticity, and a plurality of rings are provided on the inner peripheral surface of the cap body. It has been proposed to use a terminal cap formed with a protruding portion.

JP-A-10-233134

In such a terminal cap, since the waterproofing and the fall-off preventing effect from the terminal are exhibited by the restoring force that acts when the terminal is accommodated and the ring-shaped protrusion is expanded by the terminal, a single cap is provided. If it is the terminal process of an insulation coating electric wire, it can be simply implemented.
However, when terminal processing is performed on a portion where the conductors of a plurality of insulation-coated wires are connected, it is difficult to closely contact the tips of the protrusions with the surfaces of the plurality of insulation-coated wires. It is practically difficult to provide sufficient waterproofness with a cap.

Moreover, even when the terminal treatment of a single insulation-coated electric wire is performed, the waterproofness of such a terminal cap depends on the contact pressure between the protruding portion and the surface of the electric wire (restoring force of the protruding portion) and is prevented from falling off. Since the effect depends on the frictional force acting between the protrusion and the surface of the electric wire, trying to improve these effects makes the diameter of the protrusion in the natural state smaller than that of the insulated coated electric wire. Alternatively, the protrusions must be made more elastic, and it is necessary to press-fit with a strong force when the terminal is accommodated in the cap body.
That is, the conventional terminal cap has a problem that it is difficult to easily perform terminal processing with excellent waterproofness and it is difficult to maintain the waterproof effect for a long period of time.

  The present invention has an object to solve the above problems, and can provide a terminal cap that can easily perform terminal processing with excellent waterproofness and can prevent the terminal from falling off. It is an object of the present invention to provide a terminal treatment method that can easily impart waterproofness to the terminal of an insulation-coated electric wire and can maintain the waterproof effect for a long period of time.

  The present invention according to the terminal cap for solving the above-described problem is a bottomed cylindrical shape that is used by being externally fitted so as to cover the conductor on the terminal of the insulated coated electric wire from which the conductor is exposed, and in which the terminal is accommodated. The cap body is provided with a cap, and after the terminal is accommodated, a curable liquid adhesive is provided inside the cap body so that the inner surface of the cap body can be bonded and fixed to the terminal. It is characterized by being housed in.

  Moreover, this invention which concerns on the terminal processing method for solving the said subject is the said terminal with which the conductor has exposed the terminal cap provided with the bottomed cylindrical cap main body for accommodating the terminal of an insulation coating electric wire. A terminal processing method in which the conductor is covered so as to cover the conductor using a terminal cap in which a curable liquid adhesive is accommodated inside the cap body, and the terminal is accommodated. The liquid adhesive is cured to bond and fix the inner surface of the cap body to the terminal.

Since the terminal cap of the present invention contains the liquid adhesive inside the cap body in which the terminal of the insulation-coated electric wire is stored, the terminal cap is interposed between the terminal and the terminal cap when the terminal is stored. Liquid adhesive can be filled.
And since the said liquid adhesive agent has sclerosis | hardenability, this terminal cap can be adhere | attached and fixed to the terminal of an insulation coating electric wire, and waterproofness can be provided to this terminal.
That is, according to the present invention, the terminal cap of the insulation-coated electric wire can be waterproofed by a simple method in which the terminal cap is fitted around the terminal of the insulation-coated electric wire and the liquid adhesive inside is cured. The effect can be sustained for a long time.
In addition, for example, when the terminal cap of the present invention is used for terminal treatment of an insulation-coated electric wire provided with an assembly conductor, a liquid adhesive is allowed to penetrate between the strands of the assembly conductor to enter the interior of the insulation-coated electric wire. The effect of suppressing the risk of water intrusion can be exhibited.

The schematic plan view (a) and schematic front view (b) of the terminal cap of 1st embodiment. The schematic plan view (a) and schematic front view (b) which show the modification of the terminal cap of FIG. Schematic which shows the terminal processing method using the terminal cap of 1st embodiment. The schematic front view of the terminal cap which concerns on 2nd embodiment. The schematic front view which showed the mode of the inside of the terminal cap which concerns on 3rd embodiment in a terminal process. The schematic front view which showed the mode of the inside of the terminal cap which concerns on 4th embodiment in a terminal process. The schematic front view which showed the mode of the inside of the terminal cap which concerns on 5th embodiment in a terminal process.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
FIG. 1 is a schematic view showing a state in plan view and a state in front view of a terminal cap according to the first embodiment. As shown in these drawings, the terminal cap 1 according to the present embodiment has one end side. The cap body 10 having a bottomed cylindrical shape with the other end side as a closed end and the cap body 10 are internally partitioned, and a sealing material 20 for containing the liquid adhesive in a sealed state on the closed end side. And have.
FIG. 1A is a schematic plan view of the cap body 10 when the terminal cap 1 is placed upright so that the opening end 10a is the upper end, and FIG. 1B is a schematic front view. is there.

The sealing material 20 is provided in such a manner that a film is stretched horizontally at an intermediate position in the vertical direction of the cap body 10, and is arranged so as to partition the cap body 10 vertically.
That is, since the cap body 10 has a closed end 10b on the lower end side, a sealed space 10x is formed at the bottom by the sealing material 20, and the terminal cap 1 according to the present embodiment includes the sealed space 10x. The liquid adhesive is sealed and accommodated in 10x.

The cap body 10 in the present embodiment is not particularly limited, but is preferably made of a material that does not affect the physical properties of the liquid adhesive, and is formed of a material that does not substantially transmit moisture or gas. Preferably it is.
Examples of the material for forming the cap body 10 include general-purpose resin materials such as polyethylene, polypropylene, ABS, and polyvinyl chloride, and heat-resistant resin materials such as PBT and PPS.
In addition, when the terminal cap of this embodiment is used in a device that generates vibrations such as an automobile, the insulation-coated electric wire subjected to terminal treatment with the terminal cap vibrates and the terminal cap collides with surrounding members. May cause a loud hitting sound.
Further, when the vibration described above occurs, local stress is applied to the insulating coated electric wire at the mouth of the cap body 10, or the insulating coating of the insulating coated electric wire rubs against the mouth of the cap main body 10 and wears out. There is also a risk of doing.
In order to prevent this, the cap body 10 may be formed of a softer material than the above exemplified materials.
Examples of the soft material for forming the cap body 10 include chloroprene rubber, chlorosulfonated polyethylene (trade name “Hypalon”), and thermoplastic elastomer (trade name “Miralastomer”, etc.).
The sealing material 20 is not particularly limited, and can be formed of a rubber sheet, a resin sheet, a metal foil, a metal laminate resin sheet in which a metal foil and a resin sheet are laminated, or the like.

In the present embodiment, an anaerobic adhesive 30 that can be cured by contact with metal is accommodated in the sealed space 10x (hereinafter also referred to as “liquid adhesive accommodating chamber 10x”) as the liquid adhesive. The sealing material 20 is preferably made of a material having excellent oxygen permeability such as a polyethylene film.
And when accommodating the terminal of an insulation coat | covered electric wire, it shows to Fig.1 (a) so that the sealing state of the anaerobic adhesive can be easily cancelled | released with this terminal and this anaerobic adhesive can be made to contact with a conductor. As described above, it is preferable that the sealing material 20 is provided with a linear weakened portion 20a that is thinned by a half cut or the like so that the weakened portion 20a is more easily torn than other portions.
In particular, the fragile portion 20a is preferably formed so as to extend radially from the central portion of the sealing material 20 in a plan view as shown in FIG.
It is also possible to provide a perforation that penetrates the sealing material 20 in place of the half cut to form a linear fragile portion.

The anaerobic adhesive 30 may be a general one that comes into contact with a metal in an anaerobic state and is cured by a catalytic reaction. For example, an anaerobic adhesive that is mainly composed of diacrylate and peroxide. Can be adopted.
Here, if an anaerobic adhesive 30 having a high viscosity and sufficiently suppressed fluidity is employed, a sealing material is used to prevent the anaerobic adhesive from being inadvertently leaked. 20 does not need to be provided in the cap body, and the terminal cap may be configured without the sealing material 20.
That is, as the liquid adhesive in the present embodiment, a gel-like adhesive can be used as long as it exhibits fluidity when the terminal of the insulation coated electric wire is introduced into the liquid adhesive accommodating chamber 10x.
Even when anaerobic adhesive with low viscosity is used, it can be impregnated with the anaerobic adhesive, and it can be exuded to the outside again by being compressed at the terminal. A fiber cap such as a cotton ball or fabric, or a porous material such as a sponge is also housed in the cap body, and these members are impregnated and held in an anaerobic adhesive so as to be housed in the cap body. 1 can have a simple structure without using the sealing material 20 and can be manufactured easily.

Furthermore, as shown in FIG. 2, it is also possible to reduce the diameter of a part of the cap body 10 and provide a constricted portion 10y so that the constricted portion 10y can function to replace the sealing material 20 It is.
That is, the back side of the constricted portion 10y is a liquid adhesive containing chamber 10x, and the terminal of the insulated wire is inserted from the opening end 10a of the terminal cap 1 and pressed at the tip of the terminal in the terminal treatment of the insulated wire. Accordingly, the diameter of the constricted portion 10y can be expanded to allow the terminal to reach the liquid adhesive accommodating chamber 10x.

Such a terminal cap 1 has the anaerobic adhesive 30 accommodated in the liquid adhesive accommodating chamber 10x that accommodates the terminal of the insulation-coated electric wire, so that the terminal is introduced into the liquid adhesive accommodating chamber 10x. The volume of the anaerobic adhesive 30 can be overflowed from the liquid adhesive containing chamber 10x, and the overflowed anaerobic adhesive 30 can be filled between the terminal cap and the insulated coated electric wire.
And since the said anaerobic adhesive 30 shows hardening reaction by contact with metals, such as a conductor, the terminal cap 1 of this embodiment is adhere | attached and fixed to this terminal only by making it externally fit to the terminal of an insulation coating electric wire. Moreover, waterproofness is exhibited by the cured anaerobic adhesive 30.
In addition, the waterproof effect can be maintained for a long time because it is superior in the drop-off prevention effect as compared with the conventional terminal cap fixed to the end of the insulation-coated electric wire only by the frictional force.

In addition, for example, when employing an anaerobic adhesive with low viscosity, even when a flexible conductor is used in which a plurality of strands are assembled into a conductor of an insulation-coated electric wire for terminal treatment, Capillarity can be used to impregnate anaerobic adhesive between the strands, and after the anaerobic adhesive is cured, even if water may enter the inside of the terminal cap It is possible to prevent water from penetrating into the insulation-coated electric wire through the strands.
In this respect, it is preferable to employ an anaerobic adhesive having a low viscosity of about 100 mPa · s or less at room temperature.

In addition, as such an anaerobic adhesive, a type that is cured by a polymerization reaction of an acrylic monomer can be preferably employed. As an acrylic anaerobic adhesive, for example, an ether type or an ester type Can be adopted.
Among these, examples of the ether type acrylic anaerobic adhesive include those obtained by adding a peroxide to tetraethylene glycol dimethacrylate, and examples of the ester type acrylic anaerobic adhesive include triethylene glycol. Methylolpropane trimethacrylate, butanediol 1,4-dimethacrylate, 2,2,4-trimethyl1,3-pentanediol dimethacrylate, polyester acrylate containing a methacrylate group at the end, acrylate group or methacrylate group based on epoxy oligomer And those obtained by adding a peroxide to an acrylic acid ester or methacrylic acid ester of a polyhydric alcohol, such as an epoxy acrylate having a structure in which is introduced at the terminal.

  Such anaerobic adhesives are commercially available from Toagosei Co., Ltd. under the trade name “Arontite”, from Sumitomo 3M Co., Ltd. under the trade name “Scotch Weld” and available from Henkel Japan Co., Ltd. as “Loctite”. A commercially available product can be used under the trade name “

Such an anaerobic adhesive generally cures in a short time even at room temperature, so that the working time can be greatly shortened.
In addition, the anaerobic adhesive is cured by reacting with metal ions because it is shielded from air and can be stored for a long time in a terminal cap state.
That is, by using the terminal cap shown in the embodiment as described above, it is possible to easily perform terminal processing with excellent waterproofness.

In the terminal cap of the present embodiment, the width and shape of the internal space for accommodating the terminal such as the inner diameter and depth of the cap body are not particularly limited, and the exposed conductor portion of the insulation-coated wire to be accommodated The size and shape are not particularly limited as long as the material can be covered.
However, if the anaerobic adhesive is not brought to an anaerobic state to some extent when the terminal is accommodated, there is a possibility that it takes time to cure only by the reaction by contact with the metal. It is preferable to adjust so that an excessively wide gap is not formed between the inner surface and the terminal.

Further, the ratio of the anaerobic adhesive to the internal volume of the cap body, the ratio of the anaerobic adhesive to the internal volume of the liquid adhesive storage chamber, and the like are not particularly limited.
However, if the liquid adhesive storage chamber is filled with an anaerobic adhesive, there is a risk that the anaerobic adhesive will start a curing reaction before use due to lack of oxygen. It is preferable to seal the anaerobic adhesive together with a certain amount of air.
In addition, when the terminal of the insulation coated electric wire is accommodated, if the anaerobic adhesive overflows from the opening end of the cap body, it may cause a problem in workability of the terminal processing. The amount of the anaerobic adhesive to be accommodated is preferably adjusted so that it does not overflow from the open end of the cap body even when the tip of the terminal reaches the bottom (closed end) of the cap body.

An example of a terminal processing method using such a terminal cap 1 will be described with reference to FIG.
FIG. 3 is a schematic front view showing a terminal processing method using the terminal cap 1 shown in FIG. 1, and reference numerals 40 and 50 denote insulation for terminal processing using the terminal cap 1 in the present embodiment. It represents a covered electric wire.

As shown in this figure, the terminal processing method in this embodiment can be carried out by sequentially performing the following steps (a) to (f).

(A) An extraction step of extracting the conductors 40b, 50b by removing the insulation coating 40a, 50a at each end of the two insulated wires 40, 50 with a wire stripper or the like;
(B) The conductors 40b and 50b led out in the lead-out step are aligned and inserted through one opening of the crimping sleeve 60, and the conductors 40b and 50b are attached to the crimping sleeve 60 so that the tip ends project from the other opening. Sleeve installation process for insertion;
(C) A crimping sleeve 60 into which the conductors 40b and 50b are inserted is crimped with a crimping tool at each end of the insulation-coated wires 40 and 50, and the conductors of the insulation-coated wires 40 and 50 are crimped with the crimping sleeve 60 'caulked with the crimping tool. A crimping step of fixing (connecting) 40b and 50b in an electrically connected state;
(D) The terminal cap 1 is supported so that the opening end 10a is on the upper side, and the ends of the two insulated sheathed wires 40, 50 integrated by the crimping sleeve 60 'are viewed from above the terminal cap 1. An external fitting step of inserting and externally fitting the terminal cap 1 to the terminal;
(E) The fragile portion 20a of the sealing material 20 is ruptured by pressing by the terminal, and the liquid level 30a of the anaerobic adhesive 30 is raised by causing the terminal to penetrate deeper into the terminal cap 1, thereby anaerobic. Press-fitting step for causing the adhesive 30 to reach the portions where the insulating coatings 40a and 50a are formed;
(F) Holding this state for a certain period of time, causing a curing reaction in the anaerobic adhesive 30 by contact with a conductor or a crimping sleeve, and heating the anaerobic adhesive from the outside of the terminal cap as necessary. Curing process for curing.

By carrying out such a terminal treatment method, it is possible to prevent moisture from entering between the inner surface of the cap body 10 and the outer surfaces of the insulation-coated wires 40 and 50 with a cured anaerobic adhesive, and is waterproof. And the terminal cap 1 can be bonded and fixed to the ends of the insulation-coated wires 40 and 50 so that the waterproof effect can be maintained for a long time.

  In the present embodiment, since the anaerobic adhesive 30 is housed inside the terminal cap 1 as a liquid adhesive, the insulation-coated electric wire 40 is previously used in order to promote the curing of the anaerobic adhesive 30. , 50 may be applied to the end of the outer fitting step (d) after attaching metal powder or the like.

(Second embodiment)
Moreover, it replaces with the method of making a metal powder adhere to the insulation coating electric wires 40 and 50 previously, for example, the said external fitting process using the terminal cap 1 which concerns on 2nd embodiment as shown to Fig.4 (a). (D) The following steps may be performed.
The terminal cap 1 according to the second embodiment includes a member 70 (hereinafter referred to as “metal”) having at least a part of the surface thereof, such as metal powder and metal fiber, separately from the space in which the anaerobic adhesive 30 is accommodated. A metal member accommodating chamber 11x for accommodating a member 70), and the metal member accommodating chamber 11x is provided on the front (upper) side of the liquid adhesive accommodating chamber 10x with the sealing material 20 interposed therebetween. Yes.
Therefore, in the press-fitting step, the terminal can be plunged into the liquid adhesive containing chamber 10x with the metal member 70, and the curing reaction can be completed quickly by mixing the metal member 70 with the anaerobic adhesive 30. .

That is, a simpler terminal processing method can be implemented by using the terminal cap in the second embodiment.
In order to obtain the above effects, the metal member storage chamber 11x does not necessarily have to be adjacent to the liquid adhesive storage chamber 10x. As shown in FIG. Another space may be provided between the adhesive accommodating chamber 10x.
Furthermore, in order to obtain the effects as described above, it is not necessary to provide the metal member storage chamber 11x on the front side of the liquid adhesive storage chamber 10x, and the liquid adhesive storage chamber 10x as shown in FIG. If the terminal processing method is carried out by providing the metal member storage chamber 11x on the far side in the insertion direction of the terminal and allowing the tip of the terminal to reach the metal member storage chamber 11x when the terminal is stored, FIG. Similarly to the case of using the terminal cap shown in (a) and (b), the curing reaction of the anaerobic adhesive can be completed more quickly.

(Third embodiment)
Furthermore, a terminal process can also be implemented using the terminal cap 1 which concerns on 3rd embodiment as shown in FIG.
The terminal cap according to the embodiment shown in FIG. 5 has a cylindrical crimping sleeve 60 having an outer diameter slightly smaller than the inner diameter of the cap body 10 so that the outer peripheral surface thereof is in contact with the inner surface of the cap body 10. It is housed inside the main body 10.
Moreover, in the terminal cap 1 in this third embodiment, the anaerobic adhesive 30 is housed inside the cap body 10 in a state of being sealed by the balloon-like sealing material 21, and more specifically, A balloon-shaped sealing material 21 containing an anaerobic adhesive 30 is accommodated inside the crimp sleeve 60 accommodated at a position near the closed end 10b of the cap body 10.

In carrying out the terminal treatment using the terminal cap 1 of the third embodiment, the insulation-coated electric wires 40 and 50 having exposed conductors in the lead-out step are inserted into the terminal cap 1 as they are, and these The sealing material 21 containing the anaerobic adhesive 30 is ruptured at the tip end portions of the conductors 40b and 50b, and the conductors 40b and 50b are inserted into the crimping sleeve 60 accommodated in the cap body, and then a crimping tool is used. Then, the crimping sleeve 60 may be compressed and deformed from above the cap body 10 to fix the conductors 40b and 50b.
In this manner, the terminal cap of the present embodiment can easily impart waterproofness to the terminal of the insulated coated electric wire as in the previous embodiments.

(Fourth embodiment)
In the embodiments described so far, an anaerobic adhesive is used as the curable liquid adhesive to be accommodated in the terminal cap, and the curing reaction by contact with a metal such as a conductor or a crimping sleeve is exclusively used in terminal processing. However, you may make it utilize a photoreaction for hardening of a liquid adhesive agent.
For example, a photocurable adhesive such as a photocurable anaerobic adhesive or a simple ultraviolet curable adhesive can be used as the liquid adhesive, and by using such a photocurable adhesive as the liquid adhesive, Curing of the liquid adhesive can be easily carried out using external light.
When carrying out the terminal treatment using such a liquid adhesive, it is preferable to use a terminal cap according to the fourth embodiment as shown in FIG.

In the terminal cap 1 of the fourth embodiment, the material for forming the cap body 10 is different between the opening end 10a side and the closing end 10b side, with the location where the sealing material 20 is provided as a boundary. The closed end side is made of a light-impermeable colored material, and the open end side is made of a light-transmissive transparent material.
Further, the sealing material 20 is also formed of a light non-transparent colored material, and in the terminal cap 1 of the fourth embodiment, the photo-curable adhesive 31 is shielded from outside light inside. Housed in a sealed state.

When terminal processing is performed using the terminal cap 1 of the fourth embodiment, it is performed in the same manner as the examples (steps (i) to (f)) using the terminal cap of the first embodiment described above. Can do.
That is, in the press-fitting step (e), the sealing material 20 is ruptured to release the sealed state of the photocurable adhesive 31 and expose the photocurable adhesive 31 to external light. In the curing process (to) that is held for a period of time, the photocuring reaction is advanced to prevent moisture from entering between the inner surface of the cap body and the outer surface of the insulated wire with the cured photocurable adhesive. The terminal cap can be bonded and fixed to the terminal of the insulated coated electric wire.
At this time, since the opening end side of the sealing material 20 is formed of a light transmissive transparent material, a large amount of external light is irradiated to the photo-curable adhesive 31 that has moved to the transparent side due to the penetration of the terminal. This can shorten the work time of the curing process.

  If necessary, UV curing may be further performed by irradiating the photocurable adhesive 31 from the outside through a transparent portion of the cap body using a UV lamp or the like to further accelerate the curing. It may be carried out to accelerate curing.

(Fifth embodiment)
Further, instead of the terminal cap as described above, an instantaneous adhesive that can be cured by a reaction with moisture in the air can be used as a curable liquid adhesive.
That is, at least the colored portion of the terminal cap shown in FIG. 6 with respect to the previous embodiment is formed of a moisture-impermeable material such as a metal laminate resin sheet and the terminal is accommodated in the terminal cap. The terminal processing can also be performed in such a manner that the sealed state is released and the outside air is exposed.

  Moreover, when using the terminal cap accommodated in the sealed state in which the instantaneous adhesive is cut off from the outside air, for example, instead of the metal member 70 shown in FIGS. When the impregnated member such as an inorganic filler (hereinafter also referred to as “moisture introduction member”) is accommodated in a separate space from the liquid adhesive accommodating chamber 10x and the terminal cap is fitted on the end of the electric wire, the moisture introduction member May be mixed with the instantaneous adhesive to accelerate the curing reaction of the instantaneous adhesive.

Furthermore, in this fifth embodiment, for example, as shown in FIG. 7, the instantaneous adhesive 32 is applied to the cap body 10 ′ formed into a bottomed cylindrical shape with a hard breathable material such as porous ceramics. It is also possible to carry out a press-fitting step (e) in which the encapsulated balloon-shaped sealing material 22 is accommodated and this sealing material 22 is ruptured at the end of the terminal.
At this time, the instant adhesive 32 that has been exposed to the outside air due to the rupture of the sealing material 22 penetrates into the pores penetrating the cap body 10 ′ from inside to outside by capillarity, and into the pores. It cures in a form that closes the pores by reacting with the adsorbed moisture or moisture in the air.
Therefore, after the instantaneous adhesive 32 is cured, the air permeability is lost from the cap body 10 ', and waterproofness is imparted.

  Further, in the present embodiment, even when a flexible conductor formed by collecting a plurality of strands on one or both of the conductors 40b and 50b of the insulation-coated wires 40 and 50 is used, this element is used. The instant adhesive 32 can be impregnated between the wires and cured, and even if water enters the inside of the terminal cap 1, the water passes through the wires and enters the insulation-coated electric wire. Infiltration can be suppressed.

In the embodiments so far, the present invention has been described while exemplifying a terminal processing method for imparting waterproofness to a terminal in which two insulating coated electric wires are connected. For example, three or more insulating coated electric wires are used. The terminal cap used when processing the connected terminal or when processing only one insulated coated wire terminal is also within the scope of the present invention.
Although not described in detail here, it is a matter of course that various modifications other than the above examples can be made by referring to a conventionally known technical matter regarding the terminal cap and the curable liquid adhesive.

1: terminal cap, 10: cap body, 20: sealing material, 30: anaerobic adhesive (liquid adhesive), 40, 50: insulation coated electric wire, 40b, 50b: conductor

Claims (4)

A terminal cap provided with a bottomed cylindrical cap body that is used so as to cover the conductor to cover the conductor to the end of the insulation-coated electric wire in which the conductor is exposed,
A terminal cap characterized in that after the terminal is accommodated, a curable liquid adhesive is accommodated inside the cap body so that the inner surface of the cap body can be adhered and fixed to the terminal.   The liquid adhesive is a light curable adhesive curable by light, the light curable adhesive is accommodated in the cap body in a sealed state shielded from external light, and the terminal is accommodated. The terminal cap according to claim 1, wherein the light-curing adhesive is accommodated so that the sealed state is released at the terminal and exposed to external light.   The liquid adhesive is an instantaneous adhesive that can be cured by reaction with moisture in the air, the instantaneous adhesive is contained in the cap body in a sealed state that is shielded from the outside air, and the terminal is The terminal cap according to claim 1, wherein the instant adhesive is accommodated so that the sealed state is released at the terminal and can be exposed to the outside air. A terminal processing method for externally fitting a terminal cap having a bottomed cylindrical cap body for accommodating a terminal of an insulation-coated electric wire so as to cover the conductor on the terminal where the conductor is exposed,
Using a terminal cap in which a curable liquid adhesive is accommodated inside the cap body, after accommodating the terminal, the liquid adhesive is cured to the terminal to the inner surface of the cap body A terminal processing method characterized by bonding and fixing.

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