JP2010218780A - Electric wire and method for manufacturing the same, and electric wire structure and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric wire capable of reliably intercepting movement of water and oil, so as not to move the water and oil into an apparatus section where the electric wires are connected, even when the water and oil reaches the portion of the electric wire; and to provide a manufacturing method and the like. <P>SOLUTION: The core wires 11, 21 of the electric wires 10, 20 are soldered, respectively, in such a condition that they are located with some space and are not brought into contact with each other. A soldered portion 30, a portion exposed from the soldered portion 30 and covered portions 12, 22 in each of the core wires 11, 21, and the ends 12a, 22a of the covered portions are covered by an inner resin-sealed portion 31. A tightening member 32 to tighten the outer periphery of the inner resin-sealed portion 31 in all peripheries is disposed in the outer periphery of the portion corresponding to the soldered portion 30 in the inner resin-sealed portion 31. The inner resin-sealed portion 31, both sides of the tightening member 32, and the exposed portion from the inner resin-sealed portion 31 in the electric wires 10, 20 are covered by an outer resin-sealed portion 33. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electric wire and an electric wire manufacturing method, and more particularly to an electric wire and an electric wire manufacturing method used in an environment where the electric wire is rich in water, oil, and the like.

  An electric wire in which a core wire composed of a plurality of strands (metal wires) is covered with a covering portion is already widely known. This type of electric wire may be used in an environment where a large amount of water, oil, or the like is present at the end portion or the connected portion of the functional component. In this case, the wires are arranged in a state where a plurality of strands are twisted and gathered at the central portion inside the wires, but there is a small gap between the strands. Therefore, if the end of the wire core (exposed from the sheath) is immersed in water or oil, the water or oil flows through the gaps between the multiple wires due to capillary action. This may cause problems such as oxidation of the core wire.

  As a method for coping with such a problem, for example, in Patent Document 1, in a core wire composed of a plurality of strands, strands are welded to each other at a predetermined length, or a seal such as cyanoacrylate is placed between the strands. A structure for filling a gap between strands by filling a material is disclosed. According to this structure, even when water, oil, or the like enters the core wire of the wire from the outside, the water or oil is blocked by the welded portion or the sealing material filling portion, and the water, oil, or the like further proceeds in the wire. Can be prevented from flowing in.

  In Patent Document 2, thermosetting resin is immersed in the ends of a plurality of strands exposed from the ends of the electric wires (indicated as core wires in the Patent Document 2), and the ends of the wires A structure for preventing water or oil from entering between a plurality of exposed wires is disclosed.

  Patent Document 3 discloses a structure in which a space between strands is filled with a watertight composition obtained by mixing a water-swellable polymer with ultra-low density polyethylene or the like, and Patent Document 4 discloses A structure is disclosed in which a superabsorbent resin powder is filled and adhered to the outer peripheral surfaces and gaps of a plurality of strands. According to these configurations, when water enters the outer peripheral surface of the wire and the gap from the end of the wire, the water-swellable polymer and the highly water-absorbent resin powder swell and the gap between the wires is closed, It is configured to prevent water from entering.

  That is, in these Patent Documents 1 to 4, in a single electric wire, a structure in which water or oil or the like enters between a plurality of strands and prevents water from entering the inside of the electric wire along the longitudinal direction. Is disclosed.

  However, by adopting the techniques of these cited references 1 to 4, it is possible to fill the gaps between the strands in the wire and suppress the intrusion of water and oil, but the load from the outside of the wire when using the wire When the wire is bent or distorted due to stress, if the affinity and adhesion of the materials used are insufficient, interface peeling occurs between the wire coating material and the filler, and between the filler and the strand. There was a concern that a gap would occur in the electric wire. Also, if the ends of the wires are connected to each other using a wire filled with various sealing materials between a plurality of wires at the ends of the wires, the sealing material will be mixed into the connection part, leading to poor connection. In addition, there is a risk that a sealing failure may occur if the sealing material is changed so as to suppress the filling amount so as to improve the connection state.

  On the other hand, Patent Document 5 discloses an electric wire connecting device that prevents oil from flowing from one electric wire to the other electric wire between two electric wires connected to each other. As shown in FIG. 6, this wire connecting device peels off the covering portions (shown as films in the literature) of the ends of the wires 51, 52, thereby exposing the core wires 53, 54 exposed to the outside. (Referred to as a metal wire in this document) is connected by caulking with a joint terminal 55 made of a conductive metal plate, and this connecting part (referred to as a connecting part in this document) is inserted into the cavity of the terminal case 56. A resin 57 having insulation, heat resistance, and oil resistance, such as epoxy resin or silicon resin, is injected into the cavity of the terminal case 56, the connection portion and the vicinity of the ends of the electric wires 51, 52, the terminal The resin 57 is filled and solidified so as to fill a gap between the inner peripheral surface of the case 56. In addition, 58 in FIG. 6 is a rubber bush pushed into the terminal case 56.

  Also, as shown in FIG. 7, a similar connection device is also disclosed in Patent Document 6 (components having the same functions as those of the connection device shown in FIG. 6 are denoted by the same reference numerals and description thereof is omitted). ). In Patent Document 6, the resin 57 to be filled is made of a thermosetting resin having flexibility so as to improve airtightness.

  In addition, although it does not describe in detail in each literature about the connection apparatus of the core wires 53 and 54 of the edge part of the electric wires 51 and 52 by the joint terminal 55, generally the core wires 53 and 54 of the edge part of the electric wires 51 and 52 are mentioned. Usually, the joint terminals 55 are caulked and connected in a state where they overlap each other.

  According to the electric wire connecting devices described in Patent Literature 5 and Patent Literature 6, the electric wires 51 and 52 can be electrically connected, and the resin 57 is also filled around the exposed core wires 53 and 54. Therefore, it is possible to minimize the oil that has flowed through the boundary surfaces between the core wires 53 and 54 and the covering portion of the electric wires 51 and 52 from leaking to the outside or entering the connecting portion side from the outside. Can do.

JP 2005-276766 A JP 2007-317470 A JP-A-10-204227 JP-A-8-185722 Japanese Patent Publication No. 1-59467 Japanese Patent No. 2766558

  However, the conventional wire connecting devices described in Patent Document 5 and Patent Document 6 simply have a structure in which the resin 57 is filled around the core wires 53 and 54 of the wires 51 and 52 and the joint terminal 55. When the core wires 53 and 54 are composed of a plurality of strands, the resin 57 may not be satisfactorily filled in the gaps between the strands of the core wires 53 and 54. In particular, inside the joint terminal 55, the core wires 53, 54 are pressed against each other while being pressed by the joint terminal 55, so that the core wires 53, 54 caulked by the joint terminal 55 are extremely close to each other. There is a possibility that the resin 57 is not satisfactorily filled into the gaps that have become smaller or between the core wires 53 and 54 and the inner peripheral surface of the joint terminal 55. Therefore, as described above, the resin 57 is not satisfactorily filled in the gap between the strands of the core wires 53 and 54, or the gap between the strands of the core wires 53 and 54 is extremely small, If the resin 57 is not satisfactorily filled in the gap between the inner peripheral surfaces of the joint terminals 55, oil flows from the one core wire 53 into the other core wire 54 through the gap due to capillary action. There is a fear.

  Further, in the conventional electric wire connecting device described in Patent Document 5, since the resin 57 is simply filled in the hollow portion of the joint terminal 55, the outer periphery of the covering portion of the electric wire 51 and the resin 57 shown in FIG. There may be slight gaps on the boundary surface between the outer periphery of the core wires 53, 54 and the resin 57, the boundary surface between the outer periphery of the joint terminal 55 and the resin 57, and the like. Accordingly, the oil that flows along the boundary surface between the outer periphery of the covering portion of one electric wire 51 and the resin 57 and the boundary surface between the core wire 53 and the resin 57 in the electric wire 51 is between the outer periphery of the joint terminal 55 and the resin 57. There is a risk of entering the other electric wire 52 from the uncovered core wire 54 portion of the other electric wire 52 through the boundary surface.

Furthermore, the electric wire connecting devices disclosed in Patent Documents 5 and 6 have a disadvantage that the manufacturing cost is high because the structures are extremely complicated.
The present invention solves the above-mentioned problem, and is a continuous electric wire, and even if water or oil enters the electric wire, the water and oil do not move to the equipment side to which the electric wire is connected. By cutting a part of the electric wire and providing an additional connection structure there, the movement of water and oil is surely blocked. Use normal electric wires or electric wires with gaps filled with fillers. Even when the wire is used, load stress is applied from the outside of the wire when the wire is used, and the gap that promotes the movement of water and oil is completely closed, and then the water and oil are prevented from moving further. An object of the present invention is to provide a reliable electric wire and electric wire manufacturing method, an electric wire structure similar to this, and an electric wire structure manufacturing method.

  In order to solve the above problems, the electric wire of the present invention is an electric wire in which a core wire composed of a plurality of strands is covered with a covering portion, and the core wires of each electric wire are not in contact with each other with a gap. The inner resin sealing portion in which the soldered portion, the portion exposed from the soldering portion and the covering portion of each core wire, and the end portion of each covering portion are sealed with the first resin Covered, on the outer periphery of the portion corresponding to the soldering portion in the inner resin sealing portion, a fastening material for tightening the outer periphery of the inner resin sealing portion from the entire periphery is disposed, and the inner resin sealing portion, Both side portions of the fastening material and portions exposed from the inner resin sealing portion of the electric wire are covered with an outer resin sealing portion formed by sealing with a second resin.

  With this configuration, since the core wires of the electric wires are soldered in a state where there is no gap between the core wires, the solder surely flows well between the core wires of the electric wires, and the gaps are formed between the core wires of the electric wires. It can be surely prevented from occurring. Therefore, the core wires of each electric wire can be connected to each other well, and even if oil or water enters between the strands of one of the electric wire cores, the oil or water is surely connected to the soldered portion. It is possible to prevent oil and water from entering the core wire of the other electric wire. That is, if soldering is performed in a state where the core wires of the electric wires are in contact with each other, there is a possibility that a small gap where the solder does not enter is generated in the vicinity of the contact portion. Therefore, when oil or water has entered between the wires in the core wire of one electric wire, the oil or water that has entered the core wire of one electric wire through the gap is the core wire of the other electric wire. However, in the present invention, such a problem does not occur.

  In addition, the soldered part, the exposed part of each core wire, and the end part of each covering part are not only covered with the inner resin sealing part sealed with the first resin, but also the inner resin sealing. Since a fastening material for tightening the outer periphery of the inner resin sealing portion from the entire circumference is disposed on the outer periphery of the portion corresponding to the soldering portion in the portion, the soldering portion and the inner resin are tightened by the tightening force of the fastening material. As a result, it is possible to reliably prevent a gap from forming on the boundary surface with the sealing portion. As a result, even if oil or water has entered the inside of one wire, the oil or water will be It can prevent more reliably that it moves to the other electric wire side via a boundary surface with a resin sealing part. Furthermore, even when oil or water has soaked into the boundary surface between the inner resin sealing portion and the outer resin sealing portion on one electric wire side, the oil that has tried to flow along (or soak into) this boundary surface It is possible to prevent water and water from being clogged with the fastening material and flowing into the other electric wire side.

  The electric wire structure of the present invention is an electric wire structure in which an electric wire in which a core wire composed of a plurality of strands is covered with a covering portion and an uncovered metal body are electrically connected and sealed. The core wire of the electric wire and the metal body are soldered in a state where they are not in contact with each other with a gap, and a soldered portion, a portion exposed from the soldered portion and the covering portion of the core wire, The portion exposed from the soldering portion of the metal body is covered with the inner resin sealing portion that is sealed with the first resin, and on the outer periphery of the location corresponding to the soldering portion in the inner resin sealing portion. A tightening material for tightening the outer periphery of the inner resin sealing portion from the entire circumference is disposed, and the inner resin sealing portion, both side surface portions of the tightening material, and a portion exposed from the inner resin sealing portion in the wire And the metal body A portion exposed from the side resin sealing portion, characterized in that it is covered by the outer resin sealing portion comprising sealed with the second resin.

  With this configuration, since the core wire and the metal body of the electric wire are soldered in a state where they are not in contact with each other with a gap, the solder surely flows well between the core wire of the electric wire and the metal body. It is possible to reliably prevent a gap between them. Therefore, the core wire of the electric wire and the metal body can be satisfactorily connected, and even when oil or water has entered between the strands of the core wire of one electric wire, the oil or water can be It can be reliably dammed up and oil or water can be prevented from entering the metal body. That is, if soldering is performed in a state where the core wire of the electric wire and the metal body are in contact with each other, there is a possibility that a small gap where the solder does not enter is generated in the vicinity of the contact portion. Therefore, when oil or water has entered between the strands of the core wire of the electric wire, the oil or water that has entered the core wire of the electric wire through the gap may enter the metal body. There is no such a problem in the present invention.

  Moreover, the soldering part, the exposed part of the core wire, and the part exposed from the soldering part of the metal body are only covered by the inner resin sealing part sealed with the first resin. Without the tightening material for tightening the outer periphery of the inner resin sealing portion from the entire circumference on the outer periphery of the location corresponding to the soldering portion in the inner resin sealing portion, by the tightening force of the tightening material, It is possible to reliably prevent a gap from being formed at the boundary surface between the soldered portion and the inner resin sealing portion. As a result, even if oil or water enters the wire, the oil or water It can prevent moving to the metal body side via the interface of an attaching part and an inner side resin sealing part. Furthermore, even when oil or water has soaked into the boundary surface between the inner resin sealing portion and the outer resin sealing portion on the electric wire side, the oil and water can be prevented from being clogged with a fastening material and flowing into the metal body side. .

  Further, the electric wire or electric wire structure of the present invention is provided with an auxiliary tightening material for tightening the outer periphery of the covering portion of the electric wire from the entire periphery on the outer periphery of the covering portion exposed from the inner resin sealing portion of the electric wire. An outer resin seal formed by sealing a resin sealing portion, at least both side surfaces of the fastening material, an outer periphery of the covering portion exposed from the inner resin sealing portion of the electric wire, and the auxiliary fastening material. It is characterized by being covered with a stop.

  With this configuration, even when the adhesion between the second resin forming the outer resin sealing portion and the covering portion of the electric wire or the metal body is not very good, the auxiliary tightening material is applied to the electric wire covering portion by the tightening force of the auxiliary tightening material. It will be in close contact with the metal body. Therefore, even if oil or water from the inside of the wire travels around the sheath of the wire and moves along the boundary surface with the outer resin sealing portion, the oil or water is blocked by the auxiliary tightening material. Accordingly, it is possible to prevent oil and water from seeping out from the outer resin sealing portion.

  The electric wire manufacturing method of the present invention is a method of manufacturing an electric wire in which a core wire composed of a plurality of strands is covered with a covering portion, and the core wires of the electric wires are not in contact with each other with a gap between them. Then, the soldering step of soldering, the soldering portion, the portion exposed from the soldering portion and the covering portion of each core wire, and the end portion of each covering portion are sealed with the first resin, and the inner resin An inner resin sealing step for forming a sealing portion, and a fastening material for tightening the outer periphery of the inner resin sealing portion from the entire periphery on the outer periphery of the portion corresponding to the soldering portion in the inner resin sealing portion A tightening material disposing step, the inner resin sealing portion, both side surface portions of the tightening material, and portions exposed from the inner resin sealing portion of the electric wire are sealed with a second resin, And an outer resin sealing step for forming a resin sealing portion. I am characterized in. Thereby, the electric wire which can prevent reliably that oil, water, etc. from one electric wire side permeate into the other electric wire side can be obtained, although electric wires can be connected favorably.

  In addition, the method for manufacturing an electric wire structure according to the present invention includes an electric wire structure that electrically connects and seals an electric wire in which a core wire composed of a plurality of strands is covered with a covering portion and an uncovered metal body. A soldering step of soldering the core wire of the electric wire and the metal body in a state where they are not in contact with each other with a gap, a soldering portion, and a soldering portion and a covering in the core wire An inner resin sealing step of sealing the portion exposed from the portion and the portion exposed from the soldering portion of the metal body with a first resin to form an inner resin sealing portion; and the inner resin sealing A tightening material disposing step of disposing a tightening material for tightening the outer periphery of the inner resin sealing portion from the entire periphery on the outer periphery of the portion corresponding to the soldering portion in the portion, the inner resin sealing portion, and the tightening Both sides of the material and the wire The outer resin seal that forms the outer resin sealing portion by sealing the portion exposed from the inner resin sealing portion and the portion exposed from the inner resin sealing portion of the metal body with a second resin. And a stopping step. As a result, it is possible to obtain a wire connecting device that can reliably prevent the oil, water, and the like from the wire side from entering the metal body side while being able to successfully connect the wire and the metal body.

  In addition, the method of manufacturing an electric wire or electric wire structure according to the present invention includes an auxiliary fastening material arrangement in which an auxiliary fastening material for fastening the outer circumference of the electric wire from the entire circumference is disposed on the outer circumference of the portion exposed from the inner resin sealing portion of the electric wire. An outer resin sealing step, an inner resin sealing portion, at least both side surface portions of the fastening material, a portion exposed from the inner resin sealing portion in the electric wire, and the auxiliary fastening material, The outer resin sealing portion is formed by sealing with a second resin.

  According to the present invention, the core wires of each electric wire, or the core wires of the electric wires, or the metal bodies are soldered in a state where they are not in contact with each other with a gap, so Can be connected well to the metal body, and even if oil or water infiltrates between the wires in the core of one of the wires, the oil and water can be securely damped with solder. Thus, oil or water can be prevented from entering the core of the other electric wire or the metal body, and as a result, reliability such as water tightness can be improved. Further, by arranging a fastening material for tightening the outer periphery of the inner resin sealing portion from the entire periphery on the outer periphery of the location corresponding to the soldering portion in the inner resin sealing portion, the solder and the inner resin sealing portion are arranged. As a result, it is possible to prevent gaps from forming on the boundary surface. As a result, even when oil or water has entered the inside of one of the wires, this oil or water will be removed from the boundary between the solder and the inner resin sealing part. It can prevent moving to another electric wire side or a metal body side via a surface, and also by this, reliability, such as watertightness, can be improved. Furthermore, according to the present invention, it is possible to reliably prevent gas from entering between the core wires of each electric wire or between the core wire of the electric wire and the metal body, and ensure not only water tightness but also good air tightness. can do.

  In addition, by attaching an auxiliary tightening material that tightens the outer periphery of the wire from the entire circumference to the outer periphery of the portion exposed from the inner resin sealing portion of the electric wire, the auxiliary tightening material is in close contact with the covering portion of the electric wire or the metal body become. Therefore, even if oil or water from the inside of the wire travels around the sheath of the wire and moves along the boundary surface with the outer resin sealing portion, the oil or water is blocked by the auxiliary tightening material. Thus, oil and water can be prevented from seeping out from the outer resin sealing portion, and reliability such as water tightness can be improved.

(A) And (b) is sectional drawing of the electric wire which concerns on embodiment of this invention, respectively. (A)-(f) is a figure which shows the external shape of each manufacturing process of the same electric wire, respectively. (A)-(f) is sectional drawing which shows each manufacturing process of the same electric wire, respectively. (A) And (b) is sectional drawing of the electric wire structure which concerns on other embodiment of this invention, respectively. (A)-(f) is sectional drawing which shows each manufacturing process of the electric wire structure which concerns on the other embodiment, respectively. It is sectional drawing of the conventional electric wire connection apparatus. It is sectional drawing of the other conventional electric wire connection apparatus.

  Hereinafter, an electric wire and an electric wire manufacturing method, an electric wire structure, and an electric wire structure manufacturing method according to embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of an electric wire according to an embodiment of the present invention, FIG. 2 is a view showing an outer shape of each manufacturing process of the electric wire, and FIG. 3 is a cross-sectional view showing each manufacturing process of the electric wire.

  As shown to Fig.1 (a), the electric wires which concern on embodiment of this invention are covered with the core wires 11 and 21 which consist of the strand (it may not be twisted) of several strands (not shown) The electric wires 10 and 20 covered with the parts 12 and 22 are electrically connected to each other and sealed. And especially the electric wire which concerns on embodiment of this invention is soldered in the state which the core wires 11 and 21 of each electric wire 10 and 20 have a clearance gap, and are not mutually touching. More specifically, the end surfaces of the core wires 11 and 21 of the electric wires 10 and 20 are opposed to each other, and are arranged in a posture having a gap between these end surfaces, and the end surfaces of the core wires 11 and 21 of the electric wires 10 and 20 Then, soldering is performed so that the outer peripheral surfaces of the core wires 11 and 21 following these end surfaces are covered with solder. Further, the soldering part 30, the exposed parts 11a and 21a exposed from the soldering part 30 and the covering parts 12 and 22 in the core wires 11 and 21, and the end parts 12a and 22a of the covering parts 12 and 22, It is covered in a state surrounded by a cylindrical shape by an inner resin sealing portion 31 that is sealed with one resin. A ring-shaped fastening material 32 for fastening the outer periphery of the inner resin sealing portion 31 from the entire periphery is disposed on the outer periphery of the portion corresponding to the soldering portion 30 in the inner resin sealing portion 31. Ring-shaped auxiliary fastening members 34 for fastening the outer circumferences of the electric wires 10, 20 from the entire circumference are disposed on the outer circumferences of the portions exposed from the inner resin sealing portion 31 in 10, 20. Furthermore, the inner resin sealing portion 31, both side portions of the fastening material 32, portions exposed from the inner resin sealing portion 31 in the electric wires 10 and 20, and auxiliary fastening materials 34 attached to the electric wires 10 and 20 are provided. The outer resin sealing portion 33 that is sealed with the second resin is covered in a state surrounded by a cylindrical shape (or a prismatic shape or the like). The auxiliary fastening material 34 is not necessarily provided. Further, as shown in FIG. 1B, the outer resin sealing portion 33 may cover not only the both side surface portions of the tightening material 32 but also the outer peripheral surface thereof, that is, the entire tightening material 32.

  Moreover, as a use environment which arrange | positions such an electric wire 10 and 20, the middle part of the continuous electric wires 10 and 20 and the connection part of the electric wires 10 and 20 are used in the environment where water, oil, etc. exist a lot. . For example, the electric wire 10 is an electric wire portion of a functional component such as various sensors, and the electric wire portion and the end portion of the functional component are disposed in an automobile engine or the like in which lubricating oil is stored. When the electric wire 20 that is a signal line for supplying electricity and receiving signals is connected (that is, when the middle portion of the electric wires 10 and 20 is wired in oil or water, or the tip portion of the electric wire 10 or the electric wire 20) Is wired in oil or water).

  Here, an elastomer resin is suitable as the first resin forming the inner resin sealing portion 31. Furthermore, as this elastomer resin, SBS (styrene-butadiene-styrene block copolymer), SIS (styrene-isoprene-styrene block copolymer), SEBS (styrene-ethylene-butylene-styrene block copolymer), SEPS ( Polystyrene-based thermoplastic elastomer (TPE) such as styrene-ethylene / propylene-styrene block copolymer), or polyolefin-based thermoplastic elastomer (TPE) such as partially crosslinked TPO and dynamic crosslinked TPO (TPV), or polyurethane-based heat. Plastic elastomer (TPE), polyester thermoplastic elastomer (TPE), polyamide (PA6, PA12) thermoplastic elastomer (TPE), polyvinyl chloride thermoplastic elastomer (TPE), etc. are used. Good.

  In addition, as materials for forming the covering portions 12 and 22 of the electric wires 10 and 20, polyvinyl chloride resin (when the auxiliary fastening material 34 is not provided), cross-linked / non-cross-linked polyethylene resin, polyurethane resin, fluorine-based resin (PFA and others) In the case where the auxiliary tightening material 34 is provided), other respective alloy resins are suitable.

  It is more preferable that the second resin forming the outer resin sealing portion 33 is formed of a thermoplastic resin, and the material forming the fastening material 32 and the auxiliary fastening material 34 is formed of the same material as the thermoplastic resin. However, it is not limited to this. Further, as the material forming the fastening material 32 and the auxiliary fastening material 34, a thermoplastic resin having appropriate molding shrinkage that shrinks with cooling after molding is used. Here, the type of the thermoplastic resin forming the outer resin sealing portion 33 is not particularly limited, but, for example, the following materials are used. It can be appropriately selected from general-purpose resins represented by PP, PE and PVC, engineering plastic resins represented by PBT, POM and PA, and super engineering plastic resins represented by PPS, LCP, PAR and PEEK. Further, as the thermoplastic resin, a resin having the same material as the covering portions 12 and 22 of the electric wire 10 and the electric wire 20 may be used. Further, the second resin, the fastening material 32 and the auxiliary fastening material 34 forming the outer resin sealing portion 33 are preferably those having excellent adhesion and a large molding shrinkage rate.

  When a fluorine-based resin is used as a material forming the covering portions 12 and 22 of the electric wires 10 and 20, it can be used as the electric wires 10 and 20 having excellent heat resistance. In that case, the outer resin sealing portion 33 is used. By using PPS, LCP, etc. having high heat resistance as the thermoplastic resin used as the material and the thermoplastic resin used as the material for the fastening material 32 and the auxiliary fastening material 34, it becomes possible to use in a high temperature environment. Therefore, it is preferable.

  As a first combination example, as the covering portions 12 and 22 of the electric wires 10 and 20, a fluorine-based resin, an elastomer resin (first resin) forming the inner resin sealing portion 31, a polyolefin-based elastomer resin and an outer resin PPS may be used as the thermoplastic resin (second resin) forming the sealing portion 33 and the material forming the fastening material 32 and the auxiliary fastening material 34. In addition, as a second combination example, vinyl chloride resin is used as the covering portions 12 and 22 of the electric wires 10 and 20, polyester elastomer resin is used as the elastomer resin (first resin) forming the inner resin sealing portion 31, and the outer side PBT may be used as the thermoplastic resin (second resin) that forms the resin sealing portion 33 and the material that forms the fastening material 32. When the covering portions 12 and 22 are made of vinyl chloride resin and the outer resin sealing portion 33 is made of PBT, the adhesion between the vinyl chloride resin and PBT is excellent. Sex is obtained. However, depending on the use environment, there is a concern that the interface between the vinyl chloride resin and the PBT may be peeled off. In such a case, it is more preferable to use the auxiliary tightening material 34 also in joining materials having excellent adhesion. . It should be noted that various combinations of materials may be used according to the usage environment, and the thermoplastic resin and tightening that form the outer resin sealing portion 33 and the covering portions 12 and 22 of the electric wires 10 and 20 while corresponding to the usage environment. Combination with good adhesion to the material 32 and the auxiliary fastening material 34, combination with good adhesion between the covering portions 12, 22 of the electric wires 10, 20 and the elastomer resin forming the inner resin sealing portion 31, and inner resin sealing A combination having good adhesion between the elastomer resin forming the portion 31 and the thermoplastic resin forming the outer resin sealing portion 33 and the fastening material 32 and the auxiliary fastening material 34 is appropriately selected.

Next, the manufacturing method (manufacturing process) of the electric wire will be described with reference to FIG. 2 (external view) and FIG. 3 (cross-sectional view).
First, as shown in FIGS. 2 (a), 2 (b), 3 (a), and 3 (b), the core wires 11 and 21 were exposed at the midway cut portions of the electric wires and at the ends of the electric wires 10 and 20, respectively. In the state, the exposed portions 11a and 21a of the core wires 11 and 21 of the electric wires 10 and 20 are soldered in a state where they are not in contact with each other with a gap (soldering step).

  Next, as shown in FIG. 2C and FIG. 3C, the soldering portion 30 and the exposed portions 11a and 21a exposed from the soldering portion 30 and the covering portions 12 and 22 in the core wires 11 and 21, respectively. The end portions 12a and 22a of the respective covering portions 12 and 22 are sealed with a first resin (elastomer resin) to form the inner resin sealing portion 31 (inner resin sealing step).

  Thereafter, as shown in FIGS. 2 (d) and 3 (d), the outer periphery of the inner resin sealing portion 31 is placed around the outer periphery of the portion corresponding to the soldering portion 30 in the inner resin sealing portion 31. The tightening material 32 to be tightened is disposed (tightening material disposing step). Further, ring-shaped auxiliary fastening members 34 for fastening the outer circumferences of the electric wires 10 and 20 from the entire circumference are disposed on the outer circumferences of the portions exposed from the inner resin sealing portions 31 of the electric wires 10 and 20 (auxiliary fastening material arrangement). Installation process). In this case, the fastening material 32 and the auxiliary fastening material 34 are disposed by molding a resin having an appropriate molding shrinkage. That is, for the fastening material 32, a thermoplastic resin for forming a fastening material having an appropriate molding shrinkability is formed on the outer periphery of a portion corresponding to the soldering portion 30 in the inner resin sealing portion 31, and this fastening material. The forming thermoplastic resin is contracted in the radial direction of the inner resin sealing portion 31 by cooling after molding, so that the inner resin sealing portion 31 is mounted from the outer periphery by the tightening material 32. In addition, for the auxiliary fastening material 34, a thermoplastic resin for forming a fastening material having an appropriate molding shrinkability is formed on the outer periphery of the covering portions 12 and 22 of the electric wires 10 and 20, and the fastening material forming material is formed. By shrinking the thermoplastic resin in the radial direction of the covering portions 12 and 22 of the electric wires 10 and 20 by cooling after molding, the auxiliary fastening material 34 causes the covering portions 12 and 22 of the electric wires 10 and 20 to be removed from the outer periphery. Install in a tightened state. In addition, the auxiliary | assistant fastening material 34 is provided as needed, when the adhesiveness of the coating | coated parts 12 and 22 of each electric wire 10 and 20 and the outer side resin sealing part 33 is low.

  And finally, as shown in FIG. 2 (e), FIG. 3 (e), FIG. 2 (f), and FIG. 3 (f), the inner resin sealing portion 31 and both side surface portions of the fastening material 32 (or Both side surface portions and outer peripheral surface portions of the tightening material 32, that is, the entire tightening material 32), a portion exposed from the inner resin sealing portion 31 in each of the electric wires 10 and 20, and two auxiliary tightening materials 34 (auxiliary tightening materials 34 are provided. Case) is sealed with the second resin to form the outer resin sealing portion 33 (outer resin sealing step).

Through these steps, the electric wires 10 and 20 shown in FIGS. 1A and 1B can be manufactured satisfactorily.
In addition, as an example of the electric wires 10 and 20, for example, in the case of the electric wires 10 and 20 having a diameter of 1.6 mm, the gap between the core wires 11 and 21 of the electric wires 10 and 20 is about 2 to 3 mm (for example, Soldering is performed so that the distance between the covering portions 12 and 22 of the electric wires 10 and 20 is about 7 mm. The inner resin sealing portion 31 has a diameter of 3.6 mm, the fastening material 32 has an outer diameter of 5.5 mm, the auxiliary fastening material 34 has an outer diameter of 3.6 mm, and the outer resin sealing portion 33 has a diameter of 5.5 mm. (In the case shown in FIG. 1 (a)), each may be sealed and molded so as to have a length of 17 mm, but is not limited thereto.

  According to the said structure, since the core wires 11 and 21 of each electric wire 10 and 20 are soldered in the state which has a clearance gap and is not mutually contacting, the core wires 11 of the electric wires 10 and 20 are soldered. , 21 can be reliably prevented from flowing in between the core wires 11 and 21 of the electric wires 10 and 20. Accordingly, the core wires 11 and 21 of each of the electric wires 10 and 20 can be satisfactorily connected to each other, and a liquid such as oil or water or an air gas has entered between the wires of the core wire 11 of the one electric wire 10. Even in this case, the oil, water, air, or the like can be reliably damped by the soldering portion 30, and a liquid such as oil, water, or a gas such as air can be prevented from entering the core wire 21 of the other electric wire 20. That is, if soldering is performed in a state where the core wires of the electric wires are in contact with each other, there is a possibility that a small gap where the solder does not enter is generated in the vicinity of the contact portion. Therefore, when oil or water has entered between the wires in the core wire of one electric wire, the oil, water, air, or the like that has entered the core wire of the one electric wire through the gap is transferred to the other electric wire. However, in the present invention, such a problem does not occur.

  Moreover, according to the said structure, the soldering part 30, the exposed parts 11a and 21a of each core wire 11 and 21, and the edge parts 12a and 22a of each coating | coated parts 12 and 22 are covered by the inner side resin sealing part 31. In addition, since the fastening material 32 for fastening the outer periphery of the portion corresponding to the soldering portion 30 in the inner resin sealing portion 31 from the entire circumference is provided, the fastening force of the fastening material 32 causes the soldering portion 30 to It is possible to reliably prevent a gap from occurring at the boundary surface with the inner resin sealing portion 31, and as a result, even when a liquid such as oil or water or a gas such as air has entered the inside of one electric wire 10, This oil, water, air, or the like can be prevented from moving to the other electric wire 20 side via the boundary surface between the soldering portion 30 and the inner resin sealing portion 31. Furthermore, even if oil or water has soaked into the boundary surface between the inner resin sealing portion 31 and the outer resin sealing portion 33 on the one wire 10 side, the oil or water is blocked by the fastening material 32. It can prevent flowing into the boundary part between the inner resin sealing part 31 and the outer resin sealing part 33 on the other electric wire 20 side.

  Moreover, according to the said structure, even if the adhesiveness of the 2nd resin which makes the outer side resin sealing part 33, and the coating | coated parts 12 and 22 of the electric wires 10 and 20 is not so good by providing the auxiliary | assistant fastening material 34. The auxiliary tightening material 34 comes into close contact with the covering portions 12 and 22 of the electric wires 10 and 20 by the tightening force of the auxiliary tightening material 34. Therefore, even when oil, water, air, or the like is transmitted from the inside of the electric wire 10 around the covering portion 12 of the electric wire 10 and moves along the boundary surface with the outer resin sealing portion 33, this oil or water Water is dammed by the auxiliary tightening material 34, thereby preventing oil and water from seeping out from the outer resin sealing portion 33.

  Furthermore, according to the above configuration, by providing the outer resin sealing portion 33, the inner resin sealing portion 31, the ends of the electric wires 10 and 20, and the auxiliary fastening material 34 can be protected, and the inner resin sealing portion can be protected. By using a material having high adhesion to each of the stopper 31 and the covering parts 12 and 22 of the electric wires 10 and 20, the fastening material 32, and the auxiliary fastening material 34, water tightness and airtightness between the members can be obtained. Can be increased.

In addition, with the above configuration, oil, water, air, or the like can be prevented from entering the wires 10 and 20 from the outside of the wires 10 and 20.
In addition, in the said embodiment, although the intermediate part of the electric wires 10 and 20 and the case where the edge parts of the electric wires 10 and 20 were connected were demonstrated, it is not restricted to this, Fig.4 (a), (b) As shown in FIG. 2, the same configuration can be applied to the case of an electric wire structure formed by connecting the electric wire 10 and a metal body 40 such as a metal terminal. That is, the core wire 11 of the electric wire 10 and the metal body 40 are soldered in a state where they are not in contact with each other with a gap, and are exposed from the soldering portion 30 and the soldering portion 30 and the covering portion 12 in the core wire 11. And the part exposed from the soldering part 30 of the metal body 40 is covered with the inner resin sealing part 31 sealed with the first resin, and corresponds to the soldering part 30 in the inner resin sealing part 31. A fastening member 32 for fastening the outer periphery of the inner resin sealing portion 31 from the entire periphery is disposed on the outer periphery of the portion to be performed. The inner resin sealing portion 31 and both side portions of the fastening member 32 (or both side portions of the fastening member 32). And the outer peripheral surface portion, that is, the entire fastening material 32), the portion exposed from the inner resin sealing portion 31 in the electric wire 10, and the portion exposed from the inner resin sealing portion 31 of the metal body 40 are the second resin. Also the connection adapter of the wire being covered by the outer resin sealing portion 33 formed by sealed applicable. In this case, even when oil, water, air, or the like flows into the electric wire 10, the oil, water, air, or the like can be connected to the metal member 40 while the electric wire 10 and the metal member 40 can be connected well. It is possible to prevent the oil and water (including cases where air is included) from adhering to the metal body 40 and oxidizing the metal body 40 and the like.

  In this embodiment as well, the electric wire 10 may be attached to the outer periphery of the covering portion 12 exposed from the inner resin sealing portion 31 of the electric wire 10 or the portion exposed from the inner resin sealing portion 31 of the metal body 40 as necessary. The auxiliary fastening material 34 for fastening the outer periphery of the covering portion 12 from the entire circumference and the auxiliary fastening material 34 for fastening the outer periphery of the metal body 40 from the entire circumference are disposed, and the inner resin sealing portion 31 and both side portions of the fastening material 32 are provided. The outer periphery of the covering portion 12 exposed from the inner resin sealing portion 31 in the electric wire 10, the portion exposed from the inner resin sealing portion 31 in the metal body 40, and the auxiliary fastening material 34 are sealed with the second resin. The outer resin sealing portion 33 thus formed may be covered, and similar advantages can be obtained.

  In addition, as a manufacturing method of the electric wire structure which connects this electric wire 10 and the metal body 40, it can manufacture favorably by the method similar to the manufacturing method of the said electric wire. That is, first, as shown in FIGS. 5A and 5B, the exposed portion 11 a of the core wire 11 of the electric wire 10 and the end portion of the metal body 40 with the core wire 11 exposed at the end portion of each electric wire 10. Are soldered in a state where they are not in contact with each other with a gap (soldering step). Next, as shown in FIG. 5C, the soldering portion 30 and the soldering portion 30 in the core wire 11 And the exposed part 11a exposed from the covering part 12, the end part 12a of the covering part 12, and the end part of the metal body 40 are sealed with the first resin (elastomer resin), and the inner resin sealing part 31 is sealed. Form (inner resin sealing step). Thereafter, as shown in FIG. 5 (d), a fastening member 32 for fastening the outer periphery of the inner resin sealing portion 31 from the entire periphery is provided on the outer periphery of the inner resin sealing portion 31 corresponding to the soldering portion 30. Disposing (fastening material disposing step). Further, ring-shaped auxiliary fastening members 34 for fastening the outer circumferences of the electric wire 10 and the metal body 40 from the entire circumference are disposed on the outer circumferences of the portions exposed from the inner resin sealing portion 31 in the electric wire 10 and the metal body 40 (auxiliary). Fastening material placement process). In this case, the fastening material 32 and the auxiliary fastening material 34 are disposed by molding a resin having an appropriate molding shrinkage. That is, for the fastening material 32, a thermoplastic resin for forming a fastening material having an appropriate molding shrinkability is formed on the outer periphery of a portion corresponding to the soldering portion 30 in the inner resin sealing portion 31, and this fastening material. The forming thermoplastic resin is contracted in the radial direction of the inner resin sealing portion 31 by cooling after molding, so that the inner resin sealing portion 31 is mounted from the outer periphery by the tightening material 32. As for the auxiliary tightening material 34, a thermoplastic resin for forming a tightening material having an appropriate molding shrinkability is formed on the outer periphery of the covering portions 12 and 22 of the electric wire 10 and the outer periphery of the metal body 40, and this tightening material. The forming thermoplastic resin is contracted in the radial direction of the covering portion 12 and the metal body 40 of the electric wire 10 by cooling after molding, so that the covering portion 12 and the metallic body 40 of the electric wire 10 are surrounded by the auxiliary fastening material 34. Attach it while tightened. The auxiliary fastening material 34 is necessary when the adhesion between the covering portion 12 of the electric wire 10 and the outer resin sealing portion 33 is low, or when the adhesion between the metal body 40 and the outer resin sealing portion 33 is low. Provide accordingly.

  And finally, as shown in FIG.5 (e) or FIG.5 (f), the inner side resin sealing part 31 and the both-sides surface part of the fastening material 32 (or the both-sides surface part and outer peripheral surface part of the fastening material 32, ie, the fastening material 32, are shown. The whole), a portion exposed from the inner resin sealing portion 31 in the electric wire 10, a portion exposed from the inner resin sealing portion 31 in the metal body 40, and two auxiliary fastening materials 34 (when the auxiliary fastening materials 34 are provided) Are sealed with a second resin to form the outer resin sealing portion 33 (outer resin sealing step). By these steps, the electric wire structure shown in FIG. 4 can be manufactured satisfactorily.

  Moreover, according to the structure of each said embodiment, since it is a comparatively simple structure, there also exists an advantage which can suppress the manufacturing cost as such an electric wire or electric wire structure comparatively low.

DESCRIPTION OF SYMBOLS 10, 20 Electric wire 11, 21 Core wire 12, 22 Coating | coated part 30 Soldering part 31 Inner resin sealing part 32 Fastening material 33 Outer resin sealing part 34 Auxiliary fastening material 40 Metal body

Claims (8)

A core wire composed of a plurality of strands is covered with a covering portion,
The core wires of the electric wires are soldered in a state where they are not in contact with each other with a gap,
The soldering part, the part exposed from the soldering part and the covering part in each core wire, and the end part of each covering part are covered by the inner resin sealing part formed by sealing with the first resin,
On the outer periphery of the location corresponding to the soldering portion in the inner resin sealing portion, a tightening material for tightening the outer periphery of the inner resin sealing portion from the entire periphery is disposed,
The inner resin sealing portion, both side surface portions of the fastening material, and portions exposed from the inner resin sealing portion of the electric wire are covered with an outer resin sealing portion that is sealed with a second resin. An electric wire characterized by On the outer periphery of the portion exposed from the inner resin sealing portion in the electric wire, an auxiliary tightening material for tightening the outer periphery of the electric wire from the entire periphery is disposed,
An outer resin sealing portion in which an inner resin sealing portion, at least both side surface portions of the fastening material, a portion exposed from the inner resin sealing portion in the electric wire, and the auxiliary fastening material are sealed with a second resin. The electric wire according to claim 1, wherein the electric wire is covered with a wire. An electric wire structure in which a core wire composed of a plurality of strands is covered with a covering portion and an uncovered metal body are electrically connected and sealed,
In a state where the core wire of the electric wire and the metal body are not in contact with each other with a gap, they are soldered,
A soldering portion, a portion exposed from the soldering portion and the covering portion in the core wire, and a portion exposed from the soldering portion of the metal body are sealed by an inner resin sealing portion formed by sealing with a first resin. Covered,
On the outer periphery of the location corresponding to the soldering portion in the inner resin sealing portion, a tightening material for tightening the outer periphery of the inner resin sealing portion from the entire periphery is disposed,
The inner resin sealing portion, both side portions of the fastening material, a portion exposed from the inner resin sealing portion in the electric wire, and a portion exposed from the inner resin sealing portion of the metal body are second. An electric wire structure characterized by being covered with an outer resin sealing portion that is sealed with a resin. On the outer periphery of the portion exposed from the inner resin sealing portion in the electric wire, an auxiliary tightening material for tightening the outer periphery of the electric wire from the entire periphery is disposed,
An outer resin sealing portion in which an inner resin sealing portion, at least both side surface portions of the fastening material, a portion exposed from the inner resin sealing portion in the electric wire, and the auxiliary fastening material are sealed with a second resin. The electric wire structure according to claim 3, wherein the electric wire structure is covered with an electric wire. A method of manufacturing an electric wire in which a core wire composed of a plurality of strands is covered with a covering portion,
A soldering step of soldering the core wires of each electric wire in a state where the core wires are not in contact with each other with a gap;
Inner resin sealing that forms the inner resin sealing portion by sealing the soldering portion, the portion exposed from the soldering portion and the covering portion of each core wire, and the end portion of each covering portion with the first resin Process,
A tightening material disposing step of disposing a tightening material for tightening the outer periphery of the inner resin sealing portion from the entire periphery on the outer periphery of the portion corresponding to the soldering portion in the inner resin sealing portion;
The outer side which forms the outer side resin sealing part by sealing the inner side resin sealing part, the both side surface parts of the said fastening material, and the part exposed from the said inner side resin sealing part in the said electric wire with 2nd resin A method for producing an electric wire comprising a resin sealing step. An auxiliary tightening material disposing step of disposing an auxiliary tightening material for tightening the outer periphery of the electric wire from the entire periphery on the outer periphery of the portion exposed from the inner resin sealing portion in the electric wire;
In the outer resin sealing step, the inner resin sealing portion, at least both side surface portions of the fastening material, the portion exposed from the inner resin sealing portion in the electric wire, and the auxiliary fastening material are sealed with a second resin. The outer resin sealing portion is then formed, and the method of manufacturing an electric wire according to claim 5. A method of manufacturing an electric wire structure for electrically connecting and sealing an electric wire in which a core wire composed of a plurality of strands is covered with a covering portion and an uncovered metal body,
A soldering step of soldering the core wire of the electric wire and the metal body in a state of not contacting with a gap;
The inner resin sealing portion is formed by sealing the soldering portion, the portion exposed from the soldering portion and the covering portion of the core wire, and the portion exposed from the soldering portion of the metal body with the first resin. An inner resin sealing step,
A tightening material disposing step of disposing a tightening material for tightening the outer periphery of the inner resin sealing portion from the entire periphery on the outer periphery of the portion corresponding to the soldering portion in the inner resin sealing portion;
The inner resin sealing portion, both side portions of the fastening material, a portion exposed from the inner resin sealing portion in the electric wire, and a portion exposed from the inner resin sealing portion of the metal body, A method for manufacturing an electric wire structure, comprising: an outer resin sealing step of forming an outer resin sealing portion by sealing with a resin. An auxiliary tightening material disposing step of disposing an auxiliary tightening material for tightening the outer periphery of the electric wire from the entire periphery on the outer periphery of the portion exposed from the inner resin sealing portion in the electric wire;
In the outer resin sealing step, the inner resin sealing portion, at least both side surface portions of the fastening material, the portion exposed from the inner resin sealing portion in the electric wire, and the auxiliary fastening material are sealed with a second resin. The outer resin sealing portion is then formed, and the method for manufacturing the electric wire structure according to claim 7.

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