JP2008204645A - Harness waterproofing material, and manufacturing method of waterproof harness - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a waterproof harness capable of preventing a work place from being contaminated by properly adjusting the amount of adhesive to be infiltrated in a wire. <P>SOLUTION: This manufacturing method of the waterproofing harness has a preparation process to prepare a wire harness 10 which has wires 11, 12, 13 having core wires 111, 121, 131 each comprising a plurality of conductor strands and insulating coatings 112, 122, 132 respectively and in which exposed ends 111a, 121a, 131a are connected with each other, a gripping process to grip the exposed end 111a by the gripping part 3b of a harness waterproofing material 1 equipped with an external material 3 made of a hot-melt material, which has a filling part 3a filled with an adhesive 2 and the gripping part 3b to grip the core wire 111, an inserting process to insert the terminal part 102 of the wire harness 10 together with the harness waterproofing material 1 in a thermally shrinkable protective tube 19, and a heating process to infiltrate the adhesive 2 in the gap between the conductor strands to harden it, by melting the external part 3 by heating the protective tube 19 with the wire inserted in the tube. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a harness, and more particularly, to a harness waterproof material and a method for manufacturing a waterproof harness.

  A harness that is routed inside a device such as an automobile body or an electric device is provided with a number of wire connection portions that branch and connect wires distributed to each device of the device. In the electric wire connection part, the core wires exposed from the end of the insulation coating of each of the plurality of electric wires are connected. In the electric wire connection part, in order to insulate and waterproof the core wire from the outside, for example, it is covered with a protective tube.

  However, when the electric wire is of a type in which a core wire composed of a plurality of conductor strands is insulated and coated, a gap exists between the conductor strands. The gap between the conductor wires exists in the portion covered with the protective tube as well as in the insulating coating. For this reason, a part of the electric wires branched at the electric wire connecting portion is routed to a place where it is easily covered with water, for example, in an engine room of an automobile. Depending on the phenomenon, it penetrates to the wire connection. The water that has infiltrated up to the electric wire connection portion enters the other electric wires that are further branched and connected via the inside of the protective tube, and is transmitted to the devices arranged in other places.

For this problem, for example, in Patent Document 1, after electrically connecting core wire bundles in a plurality of wire terminals, the wire wires are immersed in a cyano-based adhesive and then inserted into a protective tube. A connection method is disclosed. Since the cyano adhesive before curing has a low viscosity, it is filled in the gaps between the conductor wires. Therefore, in the method of Patent Document 1, not only waterproofing of the outside of the wire connection part but also waterproofing between the wires in the wire connection part is achieved.
JP-A-9-55278

  However, in the electric wire connection method disclosed in Patent Document 1, since the electric wire is immersed in the cyano adhesive and penetrates into the gaps between the core wires, the amount of the cyano adhesive to penetrate can be appropriately controlled. Not easy. For example, in the manufacture of automobile harnesses, since the types and number of wires constituting the harness vary depending on the installed options, etc., soaking is generally performed manually, and the amount of adhesive to be permeated is constant. It is difficult.

  Further, in the step of pulling up the immersed electric wire from the cyano adhesive and inserting it into the protective tube, there is a problem that the cyano adhesive is scattered and contaminated in the work place.

  SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a waterproof harness material and a waterproof harness manufacturing method capable of appropriately adjusting the amount of adhesive penetrated into an electric wire and preventing contamination of a work place. And

A first harness waterproofing material of the present invention that achieves the above object has a plurality of electric wires each having a core wire made of a plurality of conductor strands and an insulating coating surrounding the core wire, and each of the plurality of electric wires. The end of the wire harness, which is covered with a protective tube, is composed of the exposed end of the wire harness in which the exposed ends exposed from one end of the insulating coating are connected to each other, and a portion near the one end of the insulating coating. A waterproof material for a harness to be waterproofed,
An adhesive and an outer material made of a heat-meltable material that holds the adhesive;
The outer material is
An encapsulating part encapsulating the adhesive;
And a grip portion for gripping the exposed end.

  Here, the wire harness means one having a plurality of electric wires in which the outer periphery of the core wire is insulation-coated, and not only a simple configuration consisting of a plurality of connected electric wires but also a plurality of connected electric wires. It is a concept including what is provided and a combination of electric wires of different systems that do not have a connection portion, and further includes that provided with electrical parts such as connectors.

  In the first harness waterproof material of the present invention, since the adhesive is enclosed in the enclosing portion of the outer material, the terminal portion including the exposed end is inserted into the protective tube in a state where the exposed end of the core wire is held by the holding portion. Then, the adhesive can be penetrated into the gap between the conductor wires by thermally melting the outer material. Therefore, according to the first waterproofing material of the present invention, since the amount of adhesive sealed in the waterproofing material penetrates into the gaps between the conductor wires, the penetration amount of the adhesive can be adjusted appropriately. it can. Furthermore, since the adhesive is inserted into the protective tube in a state of being enclosed in the outer material, it is possible to prevent the adhesive from being scattered in the work place.

  Here, in the first harness waterproof material of the present invention, it is preferable that the outer material is mainly composed of gelatin.

  Since gelatin absorbs less liquid than other heat-meltable materials, the enclosed adhesive spreads efficiently between conductor wires.

  In the first harness waterproof material of the present invention, the adhesive is preferably an anaerobic fixing agent.

  Here, the anaerobic fixing material means a fixing agent that starts curing when contact with air is interrupted. The anaerobic fixing agent is cured by blocking the air in a state where it is infiltrated between the conductor strands in the protective tube, and is therefore suitable for waterproofing of the electric wire end portion covered with the protective tube.

Moreover, the manufacturing method of the 1st waterproof harness of this invention which achieves the said objective is as follows.
It has a plurality of electric wires having a core wire composed of a plurality of conductor strands and an insulating coating surrounding the core wire, and an exposed end exposed from one end of the insulating coating of each of the core wires of each of the plurality of electric wires is A preparation step of preparing wire harnesses connected to each other;
A gripping step of gripping the exposed end of the core wire by the gripping portion of the harness waterproof material including an encapsulating portion enclosing an adhesive and a gripping portion for gripping the core wire and having an outer material made of a heat-meltable material. When,
An insertion step of inserting the terminal portion composed of the exposed end of the wire harness and a portion near the one end of the insulating coating into the heat-shrinkable protective tube together with the harness waterproofing material,
By heating the protective tube in a state where the electric wire is inserted, the protective tube is contracted and the outer material is melted, so that the adhesive penetrates into the gap between the conductor strands. And a heating step for curing.

  In the first waterproof harness manufacturing method of the present invention, an electric wire held by a harness waterproof material holding portion encapsulating an adhesive is inserted into the heat-shrinkable protective tube together with the harness waterproof material for protection. By melting the outer material in the tube, the adhesive penetrates into the gaps between the core wires and is cured. Therefore, according to the first waterproof harness manufacturing method of the present invention, the amount of adhesive sealed in the harness waterproof material penetrates into the gaps between the core wires, so that the penetration amount of the adhesive is adjusted appropriately. Can do. Furthermore, since the adhesive is inserted into the protective tube in a state of being enclosed in the outer material, it is possible to prevent the adhesive from being scattered in the work place.

  Here, also in the first method for manufacturing the waterproof harness, the outer material is preferably made of gelatin, and the adhesive is preferably an anaerobic fixing agent.

The second harness waterproof material of the present invention that achieves the above object has a core wire composed of a plurality of conductor strands and an insulation coating surrounding the core wire, and the core wire is provided in the middle of the insulation coating. A waterproofing material for a harness that waterproofs a damming portion that is composed of the exposed portion and a portion in the vicinity of the exposed portion of the insulating coating, and is covered with a protective tube, of a wire harness including an electric wire having an exposed exposed portion. Because
An adhesive and an outer material made of a heat-meltable material that holds the adhesive;
The outer material is
An encapsulating part enclosing the adhesive;
And a gripping part for gripping the exposed part.

  The second harness waterproof material of the present invention grips the exposed portion of the core wire exposed from the insulating coating at the damming portion provided in the middle of the electric wire constituting the harness. By heating the protective tube that covers the damming portion with the harness waterproof material gripping the exposed portion, the outer material can be thermally melted and the adhesive can be permeated into the gap between the conductor wires. Therefore, the penetration amount of the adhesive can be appropriately adjusted even in the second harness waterproof material of the present invention. Further, it is possible to prevent the adhesive from being scattered in the work place.

  Here, also in the 2nd harness waterproofing material of this invention, it is preferable that the said outer material is a thing which has gelatin as a main component.

  In the second harness waterproof material of the present invention, the adhesive is preferably an anaerobic fixing agent.

In addition, a second waterproof harness manufacturing method of the present invention that achieves the above object has a core wire composed of a plurality of conductor strands and an insulating coating surrounding the core wire, and the core wire is coated with the insulating coating. A preparation step of preparing a wire harness including an electric wire formed with an exposed portion exposed from the middle;
A gripping step of gripping the exposed portion of the core wire by the gripping portion of the harness waterproof material having an enclosing portion enclosing an adhesive and a gripping portion for gripping the core wire, and having an outer material made of a heat-meltable material When,
An insertion step of inserting a weir portion composed of the exposed portion of the wire harness and a portion in the vicinity of the exposed portion of the insulating coating into a heat-shrinkable protective tube together with the harness waterproof material;
Heating the protective tube in a state where the electric wire is inserted, shrinking the protective tube and melting the outer material, thereby allowing the adhesive to penetrate into the gap between the conductor strands, and the adhesive And a heating step for curing.

  Also in the second waterproof harness manufacturing method of the present invention, the amount of adhesive penetration can be adjusted appropriately. Further, it is possible to prevent the adhesive from being scattered in the work place.

  Here, also in the second harness waterproof material of the present invention, the outer material is preferably made of gelatin.

  Moreover, also in the 2nd harness waterproofing material of this invention, it is preferable that the said adhesive agent is an anaerobic fixing agent.

  As described above, according to the present invention, a harness waterproofing material and a waterproof harness manufacturing method that can suppress variation in the amount of the solidifying agent penetrating into the electric wire and prevent contamination of the work place are realized.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view showing an appearance of a capsule harness waterproof material according to an embodiment of the present invention.

  A capsule harness waterproof material 1 (hereinafter, simply referred to as a harness waterproof material 1) shown in FIG. 1 is for waterproofing a terminal portion of an electric wire, and an anaerobic fixing agent 2 as an adhesive, And an outer material 3 that holds the anaerobic fixing agent 2.

  The anaerobic fixing agent 2 is a fixing agent that starts curing when contact with air is blocked, and more specifically, is a fixing agent that starts curing by blocking oxygen in the air. Since the anaerobic fixing agent 2 has a low viscosity before being cured, the anaerobic fixing agent 2 penetrates into the gaps between the conductor wires constituting the core wire of the electric wire without gaps. The anaerobic fixing agent 2 has a viscosity before curing of 30 mPa · s (millipascal second) or less (= 30 cp (centipoise)) and penetrates into the gaps between the conductor wires evenly. As the anaerobic fixing agent 2, for example, a methacrylic ester-based fixing agent containing an acrylic monomer as a main component and containing a peroxide and an anaerobic catalyst can be employed. As a peroxide and an anaerobic catalyst, the thing containing an organic peroxide, a tertiary amine, and saccharin is employable, for example. The methacrylic acid ester-based fixing agent is a fixing agent that cures when the main component acrylic monomer is rapidly polymerized by a radical reaction caused by air blocking and contact with a metal, and has a viscosity before curing of 10 mPa · s ( 10 cp) or less. For this reason, the anaerobic fixing agent 2 made of a methacrylic acid ester-based fixing agent is completely filled in the gaps between the conductor wires constituting the core wire of the electric wire. Moreover, the anaerobic fixing agent 2 has a property of not decomposing even when it comes into contact with moisture when cured.

  The outer material 3 is made of a heat-meltable material, and includes an enclosing portion 3a in which the anaerobic fixing agent 2 is sealed, and a grip portion 3b that grips the core wire of the electric wire. As the heat-meltable material constituting the outer material 3, a material containing gelatin as a main component and a plasticizer added to adjust the melting temperature to about 80 ° C. is used.

  The enclosing part 3a has a substantially cylindrical outer shape, and the anaerobic fixing agent 2 before curing is sealed inside. The anaerobic fixing agent 2 is preferably encapsulated with some air in the enclosing portion 3a so that the viscosity does not increase even after long-term storage.

  The grip portion 3b is substantially cylindrical, and a gap 3c extending in the cylindrical axis direction is formed. The grip portion 3b is formed integrally with the enclosing portion 3a, and has elasticity because it is made of gelatin. When the harness waterproofing material 1 is attached to the core wire of the electric wire, the grip portion 3b is elastically deformed to grip the core wire.

  FIG. 2 is a schematic view showing the harness waterproof material manufacturing apparatus shown in FIG.

  The manufacturing apparatus 4 shown in FIG. 2 has a pair of molds M that rotate in directions opposite to each other, and each of the pair of molds M becomes an outer member 3 of the harness waterproof material 1 (see FIG. 1). Two gelatin sheets 3s are wound. The two gelatin sheets 3s are wound around the mold M and pasted at a position where the pair of molds M are close to each other, but a predetermined amount of the anaerobic fixing agent 2 is sealed together with a predetermined amount of air before the pasting. . The harness shown in FIG. 1 is formed by pasting and cutting with the manufacturing apparatus 4 in a state where the anaerobic fixing agent 2 is sealed between the gelatin sheets 3s, and then forming a gap 3c (see FIG. 1). The waterproof material 1 is obtained.

  3, FIG. 4, FIG. 5, and FIG. 6 are diagrams for explaining a method for manufacturing a waterproof harness according to an embodiment of the present invention.

  In the method for manufacturing a waterproof harness in the present embodiment, the preparation process shown in FIG. 3, the gripping process shown in FIG. 4, the insertion process shown in FIG. 5, and the heating process shown in FIG. Each process will be described in order.

  First, in the preparation step shown in FIG. 3, a wire harness 10 including a plurality of electrically connected electric wires 11, 12, and 13 is prepared. In the example of FIG. 3, the wire harness 10 which consists of the three electric wires 11, 12, and 13 is shown. The three electric wires 11, 12, and 13 each have core wires 111, 121, and 131 made of a plurality of conductor strands, and insulating coatings 112, 122, and 132 that surround the core wires 111, 121, and 131. . The conductor wires constituting the core wires 111, 121, 131 are made of a metal material such as copper, and the insulating coatings 112, 122, 132 are made of synthetic resin. Of each of the core wires 111, 121, 131, the exposed ends 111a, 121a, 131a are exposed from one ends 112a, 122a, 132a of the insulating coatings 112, 122, 132. The core wires 111, 121, 131 are electrically connected to each other in a bundled state at the connection portion 101 that is the tip portion of the exposed ends 111a, 121a, 131a. The core wires 111, 121, 131 are connected to each other by crimping, welding, or the like.

  In the preparation process of the wire harness 10 shown in FIG. 3, first, three electric wires 11, 12, 13 composed of the core wires 111, 121, 131 and the insulating coatings 112, 122, 132 are prepared. Next, the end portions of the insulating coatings 112, 122, 132 are peeled off to expose the core wires 111, 121, 131 from the 112a, 122a, 132a. The exposed portions become exposed ends 111a, 121a, and 131a. Next, the electric wires 11, 12, and 13 are arranged in substantially the same direction so that the tips of the exposed ends 111a, 121a, and 131a are aligned. Next, the tip portions of the exposed ends 111a, 121a, and 131a are heated and welded, for example, in close contact with each other to form the connection portion 101. Thus, the wire harness 10 to which the exposed ends 111a, 121a, 131a of the core wires 111, 121, 131 exposed from the ends of the insulating coatings 112, 122, 132 are connected is obtained.

  Here, in the electric wires 11, 12, and 13, the exposed ends 111 a, 121 a, and 131 a of the core wires 111, 121, and 131 and the portions near the ends 112 a, 122 a, and 132 a of the insulating coatings 112, 122, and 132 are Called.

  Next, in the holding step shown in FIG. 4, the exposed end 111a of the electric wire 11 of the wire harness 10 shown in FIG. 3 is held by the holding portion 3b of the harness waterproofing material 1 shown in FIG. Thus, the harness waterproof material 1 is attached to the terminal portion 102.

  Next, in the insertion step shown in FIG. 5, the end portions 102 of the electric wires 11, 12, and 13 are inserted into the protective tube 19 together with the harness waterproofing material 1. The protective tube 19 shown in FIG. 5 is a so-called bag-shaped heat-shrinkable tube, and has a cylindrical shape with one end recessed. The protective tube 19 has two layers, in particular, an outer layer 191 made of a heat-shrinkable resin that shrinks in the radial direction of the cylinder, and an inner layer 192 made of a thermoplastic hot-melt resin disposed inside the outer layer 191. It has a structure.

  In the insertion process of the present embodiment, the anaerobic fixing agent 2 is inserted into the protective tube 19 in a state of being enclosed in the outer material 3, so that the anaerobic fixing agent 2 is not scattered in the work place.

  Next, in the heating step shown in FIG. 6, the protection tube 19 is connected to the wires 11, 12, 13 in a state where the end portions 102 of the wires 11, 12, 13 are inserted into the protection tube 19 in the insertion step of FIG. 5. The terminal unit 102 and the harness waterproof material 1 are heated together. In this heating step, the outer layer 191 of the protective tube 19 is contracted and heated to a temperature at which the inner layer 192 hot melt resin melts, for example, about 130 ° C.

  When the temperature rises in the heating process, the outer material 3 (see FIG. 5) of the harness waterproof material 1 melts and the enclosed anaerobic fixing agent 2 flows out. The anaerobic fixing agent 2 has a low viscosity before curing and penetrates into the gaps between the conductor wires constituting the core wires 111, 121, 131.

  FIG. 7 is a partial cross-sectional view showing the internal structure of the electric wire in the heating step shown in FIG.

  FIG. 7 schematically shows a part of the electric wire 11 as a representative of the electric wires 11, 12, and 13.

  As shown in FIG. 7, the anaerobic fixing agent 2 that has flowed out of the outer material 3 (see FIG. 5) surrounds the conductor wires 113 constituting the core wire 111 and penetrates into the gaps between the conductor wires 113. Further, the anaerobic fixing agent 2 penetrates into the gap between the conductor wire 113 and the insulating coating 112.

  In the heating process shown in FIG. 6, the protective tube 19 contracts, covers the terminal portions 102 of the electric wires 11, 12, and 13, and drives the air inside the protective tube 19 to the outside. Furthermore, in the state where the hot melt resin inside the protective tube 19 is melted, the outside of the terminal portion 102 of the electric wires 11, 12, 13 is covered, so that the air inside the protective tube 19 is efficiently expelled to the outside. The anaerobic fixing agent 2 inside the protective tube 19 is cured by blocking air. Curing of the anaerobic fixing agent 2 is accelerated by contact with the metal constituting the core wires 111, 121, 131. Moreover, hardening of the anaerobic fixing agent 2 is accelerated by heating.

  After the anaerobic fixing agent 2 is cured, the protective tube 19 and the electric wires 11, 12, and 13 are cooled to cure the hot melt resin, thereby obtaining the waterproof harness 10a shown in FIG.

  Subsequently, the waterproof harness manufactured by the above-described waterproof harness manufacturing method will be described with reference to FIG.

  The waterproof harness 10a shown in FIG. 6 includes three electric wires 11, 12, and 13, a protective tube 19a that covers the electric wires 11, 12, and 13, and a cured anaerobic adhesive as a harness waterproof material in the protective tube 19a. 2a (see FIG. 8). The electric wires 11, 12, and 13 include core wires 111, 121, and 131 made of a plurality of conductor strands, and insulating coatings 112, 122, and 132 that surround the core wires 111, 121, and 131. , 122, 132 are partially connected to the exposed ends 111 a, 121 a, 131 a (the core wire 121 and the exposed end 121 a refer to FIG. 1). The protective tube 19a is a heat-shrinkable protective tube 19 (see FIG. 5) that is heat-shrinked. The exposed ends 111a, 121a, and 131a of the core wires 111, 121, and 131, and the exposed ends 111a, 121a, and 131a. It covers the terminal portion 102 composed of the nearby insulating coatings 112, 122, 132.

  8 is a cross-sectional view showing a schematic cross-sectional structure of the waterproof harness shown in FIG. Part (a) of FIG. 8 shows a cross section taken along line AA of the waterproof harness shown in FIG. 6, and Part (b) of FIG. 8 shows a cross section taken along line BB of the waterproof harness shown in FIG.

  As shown in part (a) of FIG. 8, in the portions of the core wires 111, 121, 131 exposed from the insulating coatings 112, 122, 132, the core wires 111, 121, 131 are made of hot melt resin in the protective tube 19 a. The outer layer 192 is covered with an outer layer 191 of the protective tube 19a. The core wires 111, 121, 131 are each composed of a plurality of conductor wires 113, 123, 133, and the gaps between the plurality of conductor wires 113, 123, 133 are uniformly filled with the cured anaerobic adhesive 2a. Has been.

  As shown in part (b) of FIG. 8, among the core wires 111, 121, 131, the portions in the insulating coating 112, 122, 132 in the terminal portion 102 (see FIG. 6) are in the insulating coating 112, 122, 132. The anaerobic fixing agent 2a cured between the conductor wires 113, 123, 133 is filled.

  The viscosity of the hot melt resin constituting the inner layer 192 does not become so low that it penetrates into the gaps between the conductor wires 113, 123, 133 even when heated by the heating process of FIG. 6. However, in the heating process described above, the anaerobic fixing agent 2 having a low viscosity before curing penetrates into the gaps between the conductor strands 113, 123, 133 and is cured by the heating process described above. 123 and 133 are completely filled. Therefore, in the waterproof harness 10a (see FIG. 6), for example, even if a liquid such as water enters the insulating coating 112 of one electric wire 11, it is blocked by the terminal portion 102 in the protective tube 19a. It does not enter the insulating coatings 122 and 132 of the electric wires 12 and 13. Moreover, since the hardened anaerobic fixing agent 2a is not hydrolyzed, the waterproofness is not deteriorated even when used for a long time. Further, liquid such as water does not enter from the gap between the electric wires 11, 12, 13 and the protective tube 19a.

  In the heating process of the present embodiment shown in FIG. 6, the anaerobic fixing agent 2 in an amount enclosed in the harness waterproof material penetrates into the gaps between the conductor wires 113, 123, 133, and thus anaerobic sealed in the harness waterproof material. The amount of penetration of the anaerobic fixing agent 2 can be adjusted appropriately by adjusting the amount of the adhesive fixing agent 2. For example, the amount of the anaerobic fixing agent 2 between the individual waterproof harness products can be kept constant by enclosing a certain amount of the anaerobic fixing agent 2 in the harness waterproofing material. In addition, by preparing multiple types of harness waterproofing material with different amounts of anaerobic fixing agent 2 and selecting the type of harness waterproofing material according to the type of harness, an appropriate amount of anaerobic fixing according to the type of harness Agent 2 can be permeated.

  In the embodiment described above, an example in which one set of three electric wires to which the waterproof harness 10a is connected has been described. However, the waterproof harness 1 shown in FIG. 1 and the waterproof harness shown in FIGS. This manufacturing process can also be applied to the manufacture of harnesses including unconnected electric wires.

  FIG. 9 is an external view showing another example of a harness to which the harness waterproof material shown in FIG. 1 is applied.

  A waterproof harness 200 shown in FIG. 9 is, for example, connected to devices arranged in each part of the vehicle body by being routed around the body of the automobile, and in addition to the electric wires 21, 22, and 23 connected inside the protective tube 29. In addition, electric wires 24 and 25 that are not connected inside the protective tube 29 are also provided.

  The harness waterproof material 1 shown in FIG. 1 and the waterproof harness manufacturing process shown in FIGS. 3 to 6 can also be applied to harnesses having different directions of wires to be connected.

  FIG. 10 is an external view showing still another example of the harness to which the harness waterproof material shown in FIG. 1 is applied.

  FIG. 10 shows the state of the insertion step corresponding to FIG. 5 described above, among the steps of manufacturing the waterproof harness, from the viewpoint of the structure.

  The two electric wires 31 and 32 constituting the waterproof harness 300 shown in FIG. 10 are connected in a posture in which the end sides where the core wires 311 and 321 are exposed are directed opposite to each other, and the grip portion 3b of the harness waterproof material 1 is The core wires 311 and 321 are gripped. As shown in FIG. 10, the end portions 302 of the two electric wires 31 and 32 are inserted into the cylindrical protective tube 39 together with the harness waterproof material 1. The protection tube 39 contracts when heated in the state shown in FIG. Moreover, the anaerobic fixing agent 2 flows out of the harness waterproof material 1 and penetrates into the gaps between the conductor wires of the core wires 311 and 321. As a result, a so-called intermediate joint harness type waterproof harness composed of linearly continuous electric wires can be obtained.

  Moreover, the manufacturing process of the waterproof harness 1 shown in FIG. 1 and the waterproof harness shown in FIGS. 3 to 6 includes not only a portion where a plurality of electric wires are connected to each other but also a harness as described below. It is also applicable to a process for preventing the liquid from being transmitted from one to the other in the middle of each electric wire.

  FIG. 11 is an external view showing still another example of the harness to which the harness waterproof material shown in FIG. 1 is applied.

  FIG. 11 shows the state of the insertion step corresponding to FIG. 5 described above, out of the steps for manufacturing the waterproof harness, from the viewability of the structure.

  An electric wire 41 constituting the waterproof harness 400 shown in FIG. 11 has a core wire 411 composed of a plurality of conductor wires and an insulating coating 412 surrounding the core wire 411. A portion of the insulating coating 412 is removed in the middle of the electric wire 41, and an exposed portion 411 a exposed from the middle of the insulating coating 412 is formed on the core wire 411. The grip portion 3 b of the harness waterproof material 1 grips the exposed portion 411 a of the core wire 411. A damming portion 402 composed of the exposed portion 411a and the portion of the insulating coating 412 in the vicinity of the exposed portion 411a is inserted into the cylindrical protective tube 49 together with the harness waterproofing material 1. The protection tube 49 contracts when heated in the state shown in FIG. 11 to cover the connection portion. Further, the anaerobic fixing agent 2 flows out from the harness waterproof material 1 and penetrates into the gaps between the conductor wires of the core wire 411.

  The state shown in FIG. 11 is obtained through the preparation process shown in FIG. 3, the gripping process shown in FIG. 4, and the insertion process shown in FIG. However, the preparation step of the waterproof harness 400 shown in FIG. 11 is that the exposed portion 411a is formed on the core wire 411 by removing the insulating coating 412 in the middle of one electric wire. Different from the process. Other points in the preparation process, the gripping process, and the insertion process are the same as those described with reference to FIGS.

  The protection tube 49 in the state shown in FIG. 11 contracts when it is heated in the next heating step and covers the damming portion 402. Further, the anaerobic fixing agent 2 flows out from the harness waterproof material 1 and penetrates into the gaps between the conductor wires of the core wire 411. The anaerobic fixing agent inside the protective tube 49 is cured by blocking air.

  The waterproof harness 400 obtained through the cooling process after the heating process is in a state in which the cured anaerobic fixing agent is filled in the gaps between the conductor wires at the blocking portion 402 of the electric wire 41. Therefore, even if the liquid enters the electric wire 41 from one end, it is blocked by the blocking portion 402 and does not enter the other end of the electric wire 41.

  Although the harness waterproof material 1 demonstrated so far was demonstrated as what has the substantially column-shaped enclosure part 3a and the substantially cylindrical holding | grip part 3b, it has a shape different from the harness waterproof material 1 continuously. Various modified examples of the harness waterproof material will be described.

  12 to 16 are diagrams showing five modified examples of the harness waterproof material.

  The harness waterproof material 500 of the first modification shown in FIG. 12 is a cylindrical body in which a cut 503c extending linearly along the cylindrical axis is formed, and is a cylindrical body in which the anaerobic fixing agent 2 is sealed. It has the enclosure part 503a and the holding part 503b which consists of an inner wall of a cylindrical body.

  The harness waterproof material 600 of the second modification shown in FIG. 13 has a cylindrical enclosing portion 603a and a pair of gripping portions 603b disposed on the bottom surfaces on both sides of the cylinder. Each of the grip portions 603b has a cylindrical shape, and a gap for passing the core wire is formed.

  Similarly to FIG. 13, the harness waterproofing material 700 of the third modification shown in FIG. 14 also has a cylindrical enclosing portion 703a and a pair of gripping portions 703b disposed on both side bottom surfaces of this cylinder. Each of the grip portions 703b is formed in a bowl shape.

  Part (a) of FIG. 15 shows a front view of the harness waterproof material 800 of the fourth modified example, and Part (b) shows a bottom view of the harness waterproof material 800. A harness waterproofing material 800 shown in FIG. 15 has three enclosing portions 803a, 803b, and 803c that are connected in series. Each of the enclosing portions 803a, 803b, and 803c has a spherical shape having an elliptical cross section, and seals the anaerobic fixing agent 2 therein. Of these three enclosure parts 803a, 803b, and 803c, the two enclosure parts 803b and 803c at both ends are also used as gripping parts. The two enclosure parts 803b and 803c at both ends grip the core wire of the electric wire.

  The harness waterproof material 900 of the fifth modification shown in FIG. 16 has a spherical enclosing portion 903a having an elliptical cross section, and a gripping portion 903b composed of a pair of protrusions protruding side by side from the enclosing portion. . The core wire of the electric wire is held by a pair of protrusions constituting the holding portion 903b.

  The embodiment of the present invention has been described above, but the present invention is not limited to this. In the embodiment described above, the waterproof harnesses 10a, 300, and 400 have been described as having three, two, and one electric wires, respectively, but the present invention is not limited to this and is connected. The number of wires may be four or more. However, the number of wires is preferably 10 or less. Moreover, the waterproof harness of the present invention may be one to which an electronic component such as a connector is connected.

  In the above-described embodiment, as the preparation process, a plurality of unconnected electric wires are prepared, the coating is stripped off, and the exposed core wires are connected to each other, but the preparation process of the present invention is this. For example, an electric wire in which the coating is stripped in advance and the exposed core wires are connected may be prepared.

  In the above-described embodiment, an example of an anaerobic fixing agent has been described as an adhesive. However, the adhesive of the present invention is not limited to this, and can be enclosed in the outer material 3, and a gap between conductor wires. As long as it penetrates into the surface. For example, in the case of a harness for short-term use, the adhesive may be a cyano adhesive that is cured by moisture in the air.

  Further, in the above-described embodiment, an example in which gelatin is a main component of the outer material of the waterproof waterproof material has been described. However, the present invention is not limited to this, and examples of the outer material include hot melt A heat-soluble resin such as a resin may be used. However, in terms of difficulty in absorbing the anaerobic fixing agent 2, those containing gelatin as a main component are more preferable.

It is a perspective view which shows the external appearance of the capsule harness waterproof material which is one Embodiment of this invention. It is the schematic which shows the manufacturing apparatus of the harness waterproofing material shown in FIG. It is a figure which shows a preparatory process among the processes which manufacture the waterproof harness which is one Embodiment of this invention. It is a figure which shows a holding process among the processes of manufacturing the waterproof harness which is one Embodiment of this invention. It is a figure which shows an insertion process among the processes of manufacturing the waterproof harness which is one Embodiment of this invention. It is a figure which shows a heating process among the processes which manufacture the waterproof harness which is one Embodiment of this invention. It is a fragmentary sectional view which shows the internal structure of the electric wire in the heating process shown in FIG. It is sectional drawing which shows schematic sectional structure of the waterproof harness shown in FIG. It is an external view which shows another example of the harness to which the harness waterproofing material shown in FIG. 1 was applied. It is an external view which shows another example of the harness to which the harness waterproofing material shown in FIG. 1 was applied. It is an external view which shows another example of the harness to which the harness waterproofing material shown in FIG. 1 was applied. It is a figure which shows the 1st modification of a harness waterproofing material. It is a figure which shows the 2nd modification of a harness waterproofing material. It is a figure which shows the 3rd modification of a harness waterproofing material. It is a figure which shows the 4th modification of a harness waterproofing material. It is a figure which shows the 5th modification of a harness waterproofing material.

Explanation of symbols

1,500,600,700,800,900 Capsule harness waterproof material (harness waterproof material)
2 Anaerobic adhesive (adhesive)
3 Outer material 3a, 503a, 603a, 703a,
803a, 803b, 803c, 903a Enclosed part 3b, 503b, 603b, 703b, 803b, 803c, 903b Grasping part 10 Wire harness 10a, 200, 300, 400 Waterproof harness 11, 12, 13, 21, 22, 23, 31, 32, 41 Electric wire 111, 121, 131, 311, 321, 411 Core wire 111a, 121a, 131a Exposed end 411a Exposed portion 113, 123, 133 Conductor wire 112, 122, 132, 412 Insulation coating 112a, 122a, 132a One end 102 , 302 Terminal portion 402 Damping portion 19, 19a, 29, 39, 49 Protective tube

Claims (12)

It has a plurality of electric wires having a core wire composed of a plurality of conductor strands and an insulating coating surrounding the core wire, and an exposed end exposed from one end of the insulating coating of each of the core wires of the plurality of electric wires is A waterproofing material for a harness for waterproofing a terminal portion covered with a protective tube, comprising the exposed end of a wire harness connected to each other and a portion near the one end of the insulating coating,
An adhesive and an outer material made of a heat-meltable material that holds the adhesive;
The outer material is
An encapsulating part enclosing the adhesive;
A harness waterproofing material comprising a grip portion for gripping the exposed end.   2. The harness waterproofing material according to claim 1, wherein the outer material is mainly composed of gelatin.   The harness waterproofing material according to claim 1, wherein the adhesive is an anaerobic fixing agent. It has a plurality of electric wires having a core wire composed of a plurality of conductor strands and an insulating coating surrounding the core wire, and an exposed end exposed from one end of the insulating coating of each of the core wires of the plurality of electric wires is A preparation step of preparing wire harnesses connected to each other;
A gripping step of gripping the exposed end of the core wire by the gripping portion of the harness waterproof material provided with an encapsulating portion enclosing an adhesive and a gripping portion for gripping the core wire and having an outer material made of a heat-meltable material When,
An insertion step of inserting a terminal portion composed of the exposed end of the wire harness and a portion near the one end of the insulating coating into a heat-shrinkable protective tube together with the harness waterproofing material;
Heating the protective tube in a state where the electric wire is inserted, shrinking the protective tube and melting the outer material, thereby allowing the adhesive to penetrate into the gap between the conductor strands, and the adhesive And a heating process for curing the waterproof harness.   The method for manufacturing a waterproof harness according to claim 4, wherein the outer material is made of gelatin.   The method for manufacturing a waterproof harness according to claim 4, wherein the adhesive is an anaerobic fixing agent. The exposed wire harness comprising: a core wire comprising a plurality of conductor wires; and an insulation coating surrounding the core wire, the wire harness having an electric wire formed with an exposed portion exposed from the middle of the insulation coating. A waterproofing material for a harness that waterproofs a damming portion that is composed of a portion and a portion near the exposed portion of the insulating coating and is covered with a protective tube,
An adhesive and an outer material made of a heat-meltable material that holds the adhesive;
The outer material is
An encapsulating part enclosing the adhesive;
A harness waterproofing material comprising a gripping part for gripping the exposed part.   The harness waterproof material according to claim 7, wherein the outer material is mainly composed of gelatin.   The harness waterproofing material according to claim 7, wherein the adhesive is an anaerobic fixing agent. Preparation for preparing a wire harness having a core wire composed of a plurality of conductor strands and an insulation coating surrounding the core wire, and having an electric wire in which an exposed portion exposed from the middle of the insulation coating is formed on the core wire Process,
A gripping step of gripping the exposed portion of the core wire by the gripping portion of the harness waterproof material having an enclosing portion enclosing an adhesive and a gripping portion for gripping the core wire, and having an outer material made of a heat-meltable material When,
An insertion step of inserting a weir portion composed of the exposed portion of the wire harness and a portion in the vicinity of the exposed portion of the insulating coating into a heat-shrinkable protective tube together with the harness waterproof material;
Heating the protective tube in a state where the electric wire is inserted, shrinking the protective tube and melting the outer material, thereby allowing the adhesive to penetrate into the gap between the conductor strands, and the adhesive And a heating process for curing the waterproof harness.   The method for manufacturing a waterproof harness according to claim 10, wherein the outer material is made of gelatin.   The method for manufacturing a waterproof harness according to claim 10, wherein the adhesive is an anaerobic fixing agent.

Images