WO2011161840A1 - Wire harness and method for manufacturing same - Google Patents

Wire harness and method for manufacturing same Download PDF

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Publication number
WO2011161840A1
WO2011161840A1 PCT/JP2010/067840 JP2010067840W WO2011161840A1 WO 2011161840 A1 WO2011161840 A1 WO 2011161840A1 JP 2010067840 W JP2010067840 W JP 2010067840W WO 2011161840 A1 WO2011161840 A1 WO 2011161840A1
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WO
WIPO (PCT)
Prior art keywords
wire
heat
shrinkable tube
wire bundle
thermosetting resin
Prior art date
Application number
PCT/JP2010/067840
Other languages
French (fr)
Japanese (ja)
Inventor
亮太 安田
隆夫 福田
Original Assignee
住友電装株式会社
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Filing date
Publication date
Application filed by 住友電装株式会社 filed Critical 住友電装株式会社
Publication of WO2011161840A1 publication Critical patent/WO2011161840A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/70—Insulation of connections
    • H01R4/72—Insulation of connections using a heat shrinking insulating sleeve
    • H01R4/726—Making a non-soldered electrical connection simultaneously with the heat shrinking
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/02—Cable terminations
    • H02G15/04—Cable-end sealings
    • H02G15/043—Cable-end sealings with end caps, e.g. sleeve closed at one end
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

Definitions

  • the present invention relates to a wire harness provided with a terminal waterproof portion that covers an end portion of an electric wire bundle, and a method for manufacturing the wire harness.
  • the joint portion is referred to as a terminal splice portion.
  • the part which consists of a some bare wire and terminal splice part in the edge part of an electric wire bundle is called a joining bare wire part.
  • the terminal splice part is electrically connected to the terminal of a plurality of electric wires connected to the ground terminals of a plurality of electrical equipment and the terminal of one electric wire connected to the metal frame part of the vehicle.
  • the joint bare wire part of a wire harness is waterproofed.
  • the portion subjected to the waterproof treatment at the end portion including the joint bare wire portion of the wire harness is referred to as a terminal waterproof portion.
  • FIG. 9 is a cross-sectional view of the end waterproof portion 500 of the conventional wire harness 100 corresponding to the end waterproof portion shown in Patent Document 1.
  • FIG. 10 is a diagram showing a heating process in the manufacturing method of the conventional terminal waterproofing part 500.
  • the conventional terminal waterproof part 500 shown in Patent Document 1 is realized by the following procedure. That is, first, as shown in FIG. 10, the water-stopping agent 23 having fluidity and the end portion 6 of the bundle of the plurality of electric wires 9 are connected to the heat-shrinkable tube 10A before shrinkage and one end of the heat-shrinkable tube 10A. It is placed in a cap comprising a plug 30 that closes the opening. Next, as shown in FIG. 10, the cap is heated from the outside, whereby the heat-shrinkable tube 10 ⁇ / b> A is shrunk, and the water-stopping agent 23 having fluidity is put in the gaps in the shrunk heat-shrinkable tube 10. It cures while filling.
  • the end portion 6 of the wire bundle including the end portion 91 of the insulation coating, the plurality of bare wires 8 and the end splice portion 7, and the stopper covering the bare wire 8 and the end splice portion 7.
  • the conventional waterproofing part 500 having a structure in which the cured product 22 of the liquid medicine and the stopper 30 are enclosed in the heat-shrinkable tube 10 after being contracted by being heated is realized.
  • the technique disclosed in Patent Document 1 can realize the waterproof end portion 500 having a small outer diameter by the shrinking action of the heat shrinkable tube 10.
  • the terminal waterproof part shown in Patent Document 1 requires the use of a water-stopping agent having fluidity, it includes various obstruction factors for further improvement of the conventional wire harness manufacturing process.
  • various safety measures are required in consideration of leakage of a liquid water-stopping agent at a wire harness manufacturing site.
  • an expensive dispenser is required to supply a fixed amount of liquid water-stopping agent at a wire harness manufacturing site.
  • the man-hour and cost for adding the process which closes the opening of one end with a stopper with respect to a heat contraction tube are needed.
  • the present invention realizes waterproofing of the end portion of the wire harness without using a fluid waterproofing agent, thereby further simplifying safety measures and processes in manufacturing the wire harness, and further reducing costs.
  • the purpose is to contribute.
  • the wire harness according to the present invention includes an electric wire bundle and a terminal waterproof portion.
  • a terminal waterproof part is a part which covers the wire bundle end part containing the joining bare wire part which consists of a several bare wire in the edge part of an electric wire bundle, and the junction part which the terminal of the some bare wire joined.
  • the terminal waterproofing part in the wire harness which concerns on this invention is provided with each component shown below.
  • a 1st component is a heat-shrinkable tube after shrinking
  • the second component is the only inclusion other than the end of the electric wire bundle enclosed in the heat-shrinkable tube, and the single thermosetting filled in the heat-shrinkable tube covering the joint bare wire portion This is a cured product of a functional resin.
  • the heat-shrinkable tube includes a large-diameter cylindrical portion that covers the periphery of the wire bundle end portion, and a portion that is located on the distal side of the wire bundle end portion and has a smaller inner diameter than the large-diameter cylindrical portion. It is conceivable that a small-diameter cylindrical portion is formed.
  • the cured product of a single thermosetting resin is filled in a region extending from at least the periphery of the joint bare wire portion of the large diameter cylindrical portion to a part of the small diameter cylindrical portion in the heat shrinkable tube.
  • the wire harness which concerns on this invention is manufactured by each process shown below.
  • (1) a large-diameter cylindrical portion occupying a predetermined range from the first end and a small-diameter cylindrical portion occupying a predetermined range from the second end and having an inner diameter smaller than the large-diameter cylindrical portion are formed. This is an insertion step of inserting the wire bundle end and the thermosetting resin solid into the large-diameter cylindrical portion of the heat-shrinkable tube before shrinkage.
  • the heat shrinkable tube is contracted by heating the heat shrinkable tube containing only the wire bundle end portion and the solid material of the thermosetting resin from the outside, and the solidification of the thermosetting resin is performed. This is a heating process in which the melted thermosetting resin is cured after the material is melted and the melted thermosetting resin is filled in a region covering the bare wire portion in the heat-shrinkable tube after shrinkage.
  • a wire of a thermosetting resin is used without using a water-stopping agent having fluidity, and further, without adding a process of closing the opening with a plug to the heat-shrinkable tube.
  • Waterproofing of the bare wire portion at the end of the harness can be realized.
  • various safety measures and processes required for handling fluid-proof water-stopping agents are simplified.
  • it is not necessary to close the opening of the dispenser and the heat shrinkable tube, and the manufacturing cost of the wire harness can be reduced.
  • FIG. 1 It is sectional drawing of the terminal waterproof part in the wire harness 1 which concerns on embodiment of this invention. It is a figure which shows the injection process of the solid waterproofing agent in the 1st manufacturing method of the terminal waterproof part of the wire harness. It is a figure which shows the insertion process of the wire bundle in the 1st manufacturing method of the terminal waterproof part of the wire harness. It is a figure which shows the heating process in the 1st manufacturing method of the terminal waterproof part of the wire harness. It is a perspective view of a cylindrical solid waterproofing agent. It is a figure which shows the attachment process of the solid waterproofing agent in the 2nd manufacturing method of the terminal waterproof part of the wire harness.
  • FIG. 1 It is a figure which shows the insertion process of the wire bundle in the 2nd manufacturing method of the terminal waterproof part of the wire harness. It is a figure which shows the heating process in the 2nd manufacturing method of the terminal waterproof part of the wire harness. It is sectional drawing of the terminal waterproof part of the conventional wire harness 100. FIG. It is a figure which shows the heating process in the manufacturing method of the terminal waterproof part of the conventional wire harness 100.
  • the wire harness 1 includes a wire bundle composed of a plurality of electric wires 9 and a terminal waterproof portion 5 at an end portion of the wire bundle.
  • the terminal waterproof portion 5 includes a plurality of bare wires 8 at the end of the wire bundle, a terminal splice portion 7 where the ends of the plurality of bare wires 8 are joined, and an end portion 91 of the insulation coating. 6 is provided.
  • the plurality of bare wires 8 at the ends of the wire bundle and the end splice portion 7 where the ends of the plurality of bare wires 8 are joined together are referred to as joined bare wire portions 7 and 8.
  • the terminal waterproof part 5 includes a heat-shrinkable tube 10 after shrinkage and a post-curing water-stopping agent 20.
  • the heat-shrinkable tube 10 after shrinkage is a heat-shrinkable tube that contains the wire bundle end 6 and shrinks when heated.
  • the post-curing water-stopping agent 20 is a cured product of a single thermosetting resin filled in the heat-shrinkable tube 10 after shrinkage so as to cover the bare bare wire portions 7 and 8.
  • a cured product of a single thermosetting resin does not include two or more types of cured products of different thermosetting resins with different components, and is composed only of a cured product of the same type of thermosetting resin. Means a thing.
  • the post-curing water-stopping agent 20 is the only inclusion other than the wire bundle end portion 6 included in the heat-shrinkable tube 10 after shrinkage. That is, the terminal waterproof part 5 is a substance such as a plug other than the wire bundle end part 6 and the post-curing water-stopping agent 20 in the heat-shrinkable tube 10 after contraction, as compared with the conventional terminal waterproof part 500 shown in FIG. Is different in that there is no.
  • the heat-shrinkable tube 10 after contraction has a small-diameter cylindrical portion 13 that occupies a range of about several millimeters from one end 11 on the end side thereof, and a portion that occupies a range of about tens of millimeters from the other end 12
  • the large-diameter cylindrical portion 14 is formed.
  • the large diameter cylindrical portion 14 is a portion that covers the periphery of the wire bundle end portion 6.
  • the small-diameter cylindrical portion 13 is a portion located on the terminal side of the wire bundle end portion 6 and having a smaller inner diameter than the large-diameter cylindrical portion 14.
  • the post-curing water-stopping agent 20 which is a cured product of a single thermosetting resin, is a small-diameter cylinder from around the bare bare wire portions 7 and 8 of the large-diameter tubular portion 14 in the heat-shrinkable tube 10 after shrinkage. An area extending to a part of the portion 13 is filled.
  • the post-curing waterproofing agent 20 is filled in a region extending from a part of the end portion 91 of the insulating coating to a part of the small-diameter cylindrical portion 13 in the heat-shrinkable tube 10 after shrinkage. Yes.
  • the end waterproof portion 5 shown in FIG. 8 prevents contact with moisture due to raindrops and condensation. Moreover, since the heat-shrinkable tube 10 after shrinkage
  • FIGS. 2 to 4 are diagrams schematically showing a solid water-stopper charging step, an electric wire bundle insertion step, and a heating step in the first manufacturing method.
  • the 1st manufacturing method of the terminal waterproof part 5 is implement
  • a step of introducing the solid water-stopping agent 21 into the heat-shrinkable tube 10A before shrinking is executed.
  • the heat-shrinkable tube 10A before contraction is a small-diameter cylindrical part 13 that occupies a range of about several millimeters from one end 11 and a large-diameter cylindrical part that occupies a range of several tens of millimeters from the other end 12 14 are formed.
  • the heat-shrinkable tube 10A is a heat-shrinkable cylindrical member such as polyolefin, fluorine-based resin, chlorine-based resin, or thermoplastic elastomer.
  • the heat-shrinkable tube 10A it is preferable to use a tube made of polyolefin that has been subjected to electron beam crosslinking treatment. As shown in FIG. 2, the heat-shrinkable tube 10 ⁇ / b> A before contraction employed in the terminal waterproofing unit 5 is not subjected to a process of closing the opening with a plug or the like at both ends 11 and 12.
  • the solid waterproofing agent 21 is a solid material of a thermosetting resin, for example, a solid material formed by pressing a powder of a thermosetting resin such as an epoxy resin, a phenol resin, or a urea resin.
  • a thermosetting resin such as an epoxy resin, a phenol resin, or a urea resin.
  • the thermosetting resin constituting the solid water-stopping agent 21 it is preferable to employ an epoxy resin excellent in workability and fluidity when melted by heating.
  • the outer shape of the solid water-stopping agent 21 is formed with a width larger than the inner diameter of the small-diameter cylindrical portion 13 and a width smaller than the inner diameter of the large-diameter cylindrical portion 14.
  • the heat-shrinkable tube 10A before shrinkage is held so that the end 12 on the large-diameter cylindrical portion 14 side is upward, and the solid water-stopping agent 21 is on the large-diameter cylindrical portion 14 side. It is thrown into the large diameter cylindrical portion 14 of the heat shrinkable tube 10A before shrinkage from the opening of the end 12. Thereby, the solid waterproofing agent 21 stays in the large diameter cylindrical portion 14.
  • the solid water-stopping agent 21 has various shapes such as a columnar shape or a quadrangular prism shape.
  • the solid waterproofing agent 21 shown in FIG. 2 has a shape in which the corners of the bottom surface of the cylinder are chamfered.
  • a step of inserting the wire bundle end portion 6 into the large-diameter cylindrical portion 14 into which the solid water-stopping agent 21 is charged is executed.
  • 10 A of heat-shrinkable tubes before shrinking will be in the state which includes only the wire bundle edge part 6 and the solid waterproofing agent 21 which consists of a thermosetting resin of a single composition.
  • the charging step of the solid water-stopping agent and the insertion step of the electric wire bundle are performed in the large-diameter cylindrical portion 14 of the heat-shrinkable tube 10A before shrinkage in the wire bundle end portion 6 and the solid water-stopping agent 21 (of the thermosetting resin). It is an example of the insertion process which inserts a solid substance.
  • the tip of the wire bundle end 6, that is, the tip of the terminal splice portion 7 is inserted to a position where it contacts the solid water-stopping agent 21.
  • a recess into which the tip of the wire bundle end portion 6 inserted into the heat-shrinkable tube 10A before shrinkage fits is formed in the central portion of the solid water-stopping agent 21.
  • the heater 50 performs heating at a temperature equal to or higher than the contraction temperature of the heat-shrinkable tube 10 ⁇ / b> A and equal to or higher than the melting temperature of the solid water-stopping agent 21. Further, by using the heater 50 capable of adjusting the heating power for each position, it is possible to heat the position around the solid waterproofing agent 21 in the heat-shrinkable tube 10A at a temperature higher than the other positions. . Such heating is effective when the melting temperature of the solid waterproofing agent 21 is higher than the contraction temperature of the heat-shrinkable tube 10A.
  • the melted liquid water-stopping agent rises while filling a narrow gap in the contracted heat-shrinkable tube 10 due to a capillary phenomenon. Further, the melted liquid water-stopping agent does not leak from the opening of the small-diameter cylindrical portion 13 below the heat shrinkable tube 10 due to the upward suction force due to the capillary phenomenon, and the liquid level is held in the small-diameter cylindrical portion 13.
  • the molten liquid water-stopping agent is a region extending from a part of the end portion 91 of the insulating coating to a part of the small-diameter cylindrical portion 13 in the heat-shrinkable tube 10 after the contraction. It changes to the water stop agent 20 after hardening with which it filled.
  • the solid water-stopping agent 21 which is a solid substance of a thermosetting resin is used, and also the heat shrink before shrinkage
  • Waterproofing of the joint bare wire portions 7 and 8 in the wire harness 1 can be realized without adding processing for closing the opening to the tube 10A with a stopper. As a result, various safety measures and processes required for handling fluid-proof water-stopping agents are simplified.
  • FIG. 5 is a perspective view of an example of the solid waterproofing agent 21 used in the second manufacturing method.
  • FIGS. 6 to 8 are diagrams schematically showing a solid water-stopper attaching step, a wire bundle inserting step, and a heating step in the second manufacturing method.
  • a hole 211 formed in the solid waterproofing agent 21 is a hole through which the wire bundle end portion 6 is passed.
  • the 2nd manufacturing method of the terminal waterproof part 5 is implement
  • a step of inserting the wire bundle end portion 6 to which the solid waterproofing agent 21 is attached into the large-diameter cylindrical portion 14 of the heat-shrinkable tube 10 ⁇ / b> A before shrinking is executed.
  • 10 A of heat-shrinkable tubes before shrinking will be in the state which includes only the wire bundle edge part 6 and the solid waterproofing agent 21 which consists of a thermosetting resin of a single composition.
  • the wire bundle end portion 6 is inserted into the heat-shrinkable tube 10A before contraction in a state where the solid waterproofing agent 21 is attached to a predetermined position in the wire bundle end portion 6. Is done. Therefore, the position of the solid waterproofing agent 21 and the wire bundle end portion 6 is stabilized, and the quality of the terminal waterproof portion 5 is stabilized.
  • the heat-shrinkable tube 10A before shrinkage used in the second production method is the same as the heat-shrinkable tube 10A before shrinkage used in the first production method.
  • the wire bundle end 6 to which the solid waterproofing agent 21 is attached is the large-diameter cylindrical portion of the heat-shrinkable tube 10A before contraction from the opening of the end 12 on the large-diameter cylindrical portion 14 side. 14 is inserted.
  • the heat-shrinkable tube 10A before contraction is held such that the end 12 on the large-diameter cylindrical portion 14 side is upward, and the end 12 on the large-diameter cylindrical portion 14 side is downward. The case where it hold
  • the step of attaching the solid water-stopping agent and the step of inserting the wire bundle include the wire bundle end portion 6 and the solid water-stopping agent 21 in the large-diameter cylindrical portion 14 of the heat-shrinkable tube 10A before shrinkage. It is an example of the insertion process which inserts (solid material of a thermosetting resin).
  • the heating process in the second manufacturing method includes the wire bundle end 6 and the solid waterproofing agent 21 in the heat-shrinkable tube 10 ⁇ / b> A at the start of heating. Only the positional relationship is different. Therefore, the heat shrinkable tube 10A shrinks by the heating step shown in FIG. 8, the solid water-stopping agent 21 melts, and the melted water-stopping agent (thermosetting resin) is joined to the bare wire portion in the heat-shrinkable tube 10A. The area covering 7 and 8 is filled, and then the molten water-stopping agent is cured.
  • the terminal waterproof part 5 of the wire harness 1 shown by FIG. 1 is manufactured similarly to the case where the 1st manufacturing method is employ
  • the second manufacturing method can provide the same operations and effects as the first manufacturing method.

Abstract

Disclosed is a wire harness which: makes the terminal part of the wire harness waterproof without using a fluid waterproofing agent; further simplifies the safety measures and steps involved in manufacturing wire harnesses; and contributes to further cost reduction. The waterproof section (5) of the wire harness (1) terminal is equipped with: a contracted thermal contraction tube (10) that encapsulates a wire bundle terminal section (6); and a hardened material (20) of a single thermosetting resin that fills the inside of the thermal contraction tube (10), thereby covering bare wire sections (7, 8). The hardened material (20) is the sole inclusion other than the wire bundle terminal section (6) encapsulated by the thermal contraction tube (10). The hardened material (20) is formed by heating the thermal contraction tube (10), which encapsulates only the wire bundle terminal section (6) and the solid material of the thermosetting resin, from the outside, and then by curing the melted thermosetting resin after impregnating the area that covers the bare wire sections (7, 8) inside the contracted thermal contraction tube (10).

Description

ワイヤハーネス及びその製造方法Wire harness and manufacturing method thereof
　本発明は、電線束の端部を覆う末端防水部を備えたワイヤハーネス及びそのワイヤハーネスの製造方法に関する。 The present invention relates to a wire harness provided with a terminal waterproof portion that covers an end portion of an electric wire bundle, and a method for manufacturing the wire harness.
　一般に、自動車に代表される車両に搭載されるワイヤハーネスにおいて、複数の電線が電気的に接続される場合、電線束の端部における複数の裸線の末端が、溶接によって１つの接合部に接合される。以下、その接合部のことを、末端スプライス部と称する。また、電線束の端部における複数の裸線及び末端スプライス部からなる部分のことを接合裸線部と称する。 Generally, in a wire harness mounted on a vehicle represented by an automobile, when a plurality of electric wires are electrically connected, the ends of the plurality of bare wires at the end of the wire bundle are joined to one joint by welding. Is done. Hereinafter, the joint portion is referred to as a terminal splice portion. Moreover, the part which consists of a some bare wire and terminal splice part in the edge part of an electric wire bundle is called a joining bare wire part.
　末端スプライス部は、例えば、複数の電装機器のグランド端子各々に接続される複数の電線の末端と、車両の金属フレーム部に接続される１本の電線の末端とが電気的に接続される場合などに採用される。また、ワイヤハーネスの接合裸線部は、防水処理が施される。以下、ワイヤハーネスの接合裸線部を含む端部における防水処理が施された部分のことを末端防水部と称する。 For example, when the terminal splice part is electrically connected to the terminal of a plurality of electric wires connected to the ground terminals of a plurality of electrical equipment and the terminal of one electric wire connected to the metal frame part of the vehicle. Adopted. Moreover, the joint bare wire part of a wire harness is waterproofed. Hereinafter, the portion subjected to the waterproof treatment at the end portion including the joint bare wire portion of the wire harness is referred to as a terminal waterproof portion.
　ワイヤハーネスにおける従来の末端防水部は、例えば、特許文献１に示されている。図９は、特許文献１に示される末端防水部に相当する従来のワイヤハーネス１００の末端防水部５００の断面図である。また、図１０は、従来の末端防水部５００の製法における加熱工程を示す図である。 A conventional terminal waterproof portion in a wire harness is disclosed in Patent Document 1, for example. FIG. 9 is a cross-sectional view of the end waterproof portion 500 of the conventional wire harness 100 corresponding to the end waterproof portion shown in Patent Document 1. FIG. 10 is a diagram showing a heating process in the manufacturing method of the conventional terminal waterproofing part 500.
　特許文献１に示される従来の末端防水部５００は、以下の手順により実現される。即ち、まず、図１０に示されるように、流動性を有する止水剤２３と複数の電線９の束の端部６とが、収縮前の熱収縮チューブ１０Ａとその熱収縮チューブ１０Ａの一端の開口を閉じる栓３０とからなるキャップ内に入れられる。次に、図１０に示されるように、キャップが外側から加熱され、これにより、熱収縮チューブ１０Ａが収縮するとともに、流動性を有する止水剤２３が、収縮した熱収縮チューブ１０内の隙間に充満しつつ硬化する。 The conventional terminal waterproof part 500 shown in Patent Document 1 is realized by the following procedure. That is, first, as shown in FIG. 10, the water-stopping agent 23 having fluidity and the end portion 6 of the bundle of the plurality of electric wires 9 are connected to the heat-shrinkable tube 10A before shrinkage and one end of the heat-shrinkable tube 10A. It is placed in a cap comprising a plug 30 that closes the opening. Next, as shown in FIG. 10, the cap is heated from the outside, whereby the heat-shrinkable tube 10 </ b> A is shrunk, and the water-stopping agent 23 having fluidity is put in the gaps in the shrunk heat-shrinkable tube 10. It cures while filling.
　その結果、図９に示されるように、絶縁被覆の端部９１と複数の裸線８と末端スプライス部７とを含む電線束の端部６と、裸線８及び末端スプライス部７を覆う止水剤の硬化物２２と、栓３０とが、加熱されることによって収縮した後の熱収縮チューブ１０内に内包された構造を有する従来の末端防水部５００が実現される。特許文献１に示される技術は、熱収縮チューブ１０の収縮作用により、外径が細い末端防水部５００を実現することができる。 As a result, as shown in FIG. 9, the end portion 6 of the wire bundle including the end portion 91 of the insulation coating, the plurality of bare wires 8 and the end splice portion 7, and the stopper covering the bare wire 8 and the end splice portion 7. The conventional waterproofing part 500 having a structure in which the cured product 22 of the liquid medicine and the stopper 30 are enclosed in the heat-shrinkable tube 10 after being contracted by being heated is realized. The technique disclosed in Patent Document 1 can realize the waterproof end portion 500 having a small outer diameter by the shrinking action of the heat shrinkable tube 10.
特開２００６－８１３１９号公報JP 2006-81319 A
　しかしながら、特許文献１に示される末端防水部は、流動性を有する止水剤の使用が必要であるため、従来のワイヤハーネスの製造工程のさらなる改善に対する各種の阻害要因を含んでいる。例えば、ワイヤハーネスの製造現場において、液状の止水剤の漏出を考慮した各種の安全対策が必要となる。また、ワイヤハーネスの製造現場において、液状の止水剤を一定量ずつ供給するために高価なディスペンサが必要となる。さらに、熱収縮チューブに対し、一端の開口を栓で閉じる加工を加えるための工数及びコストが必要となる。これらの事項は、ワイヤハーネスの製造において、安全対策及び工程のさらなる簡素化、並びにさらなる低コスト化を阻害する要因となる。 However, since the terminal waterproof part shown in Patent Document 1 requires the use of a water-stopping agent having fluidity, it includes various obstruction factors for further improvement of the conventional wire harness manufacturing process. For example, various safety measures are required in consideration of leakage of a liquid water-stopping agent at a wire harness manufacturing site. In addition, an expensive dispenser is required to supply a fixed amount of liquid water-stopping agent at a wire harness manufacturing site. Furthermore, the man-hour and cost for adding the process which closes the opening of one end with a stopper with respect to a heat contraction tube are needed. These matters become factors that hinder further simplification of safety measures and processes and further cost reduction in the production of wire harnesses.
　本発明は、流動性を有する止水剤を使用することなくワイヤハーネスにおける末端部分の防水を実現し、これにより、ワイヤハーネスの製造における安全対策及び工程のさらなる簡素化、並びにさらなる低コスト化に寄与することを目的とする。 The present invention realizes waterproofing of the end portion of the wire harness without using a fluid waterproofing agent, thereby further simplifying safety measures and processes in manufacturing the wire harness, and further reducing costs. The purpose is to contribute.
　本発明に係るワイヤハーネスは、電線束と、末端防水部とを備える。末端防水部は、電線束の端部における複数の裸線及びその複数の裸線の末端が接合された接合部からなる接合裸線部を含む電線束端部を覆う部分である。さらに、本発明に係るワイヤハーネスにおける末端防水部は、以下に示す各構成要素を備える。
（１）第１の構成要素は、電線束端部を内包し、加熱されることによって収縮した後の熱収縮チューブである。
（２）第２の構成要素は、熱収縮チューブに内包された電線束端部以外の唯一の内包物であり、熱収縮チューブ内において接合裸線部を覆って充填された単一の熱硬化性樹脂の硬化物である。 The wire harness according to the present invention includes an electric wire bundle and a terminal waterproof portion. A terminal waterproof part is a part which covers the wire bundle end part containing the joining bare wire part which consists of a several bare wire in the edge part of an electric wire bundle, and the junction part which the terminal of the some bare wire joined. Furthermore, the terminal waterproofing part in the wire harness which concerns on this invention is provided with each component shown below.
(1) A 1st component is a heat-shrinkable tube after shrinking | contracting by enclosing an electric wire bundle end part and being heated.
(2) The second component is the only inclusion other than the end of the electric wire bundle enclosed in the heat-shrinkable tube, and the single thermosetting filled in the heat-shrinkable tube covering the joint bare wire portion This is a cured product of a functional resin.
　また、本発明に係るワイヤハーネスにおいて、熱収縮チューブは、電線束端部の周囲を覆う大径筒部と電線束端部よりも末端側に位置して大径筒部よりも内径が小さい部分である小径筒部とが形成されていることが考えられる。この場合、単一の熱硬化性樹脂の硬化物は、熱収縮チューブ内における少なくとも大径筒部の接合裸線部の周囲から小径筒部の一部までに渡る領域に充填されている。 In the wire harness according to the present invention, the heat-shrinkable tube includes a large-diameter cylindrical portion that covers the periphery of the wire bundle end portion, and a portion that is located on the distal side of the wire bundle end portion and has a smaller inner diameter than the large-diameter cylindrical portion. It is conceivable that a small-diameter cylindrical portion is formed. In this case, the cured product of a single thermosetting resin is filled in a region extending from at least the periphery of the joint bare wire portion of the large diameter cylindrical portion to a part of the small diameter cylindrical portion in the heat shrinkable tube.
　また、本発明に係るワイヤハーネスは、以下に示される各工程により製造される。
（１）第１の工程は、第１の端から所定の範囲を占める大径筒部と第２の端から所定の範囲を占め前記大径筒部よりも内径が小さい小径筒部とが形成された収縮前の熱収縮チューブにおける大径筒部内に、電線束端部と熱硬化性樹脂の固形物とを挿入する挿入工程である。
（２）第２の工程は、電線束端部及び熱硬化性樹脂の固形物のみを内包する熱収縮チューブを外側から加熱することにより、熱収縮チューブを収縮させるとともに、熱硬化性樹脂の固形物を溶融させ、溶融した熱硬化性樹脂を収縮後の熱収縮チューブ内における接合裸線部を覆う領域に充満させた後に、溶融した熱硬化性樹脂を硬化させる加熱工程である。 Moreover, the wire harness which concerns on this invention is manufactured by each process shown below.
(1) In the first step, a large-diameter cylindrical portion occupying a predetermined range from the first end and a small-diameter cylindrical portion occupying a predetermined range from the second end and having an inner diameter smaller than the large-diameter cylindrical portion are formed. This is an insertion step of inserting the wire bundle end and the thermosetting resin solid into the large-diameter cylindrical portion of the heat-shrinkable tube before shrinkage.
(2) In the second step, the heat shrinkable tube is contracted by heating the heat shrinkable tube containing only the wire bundle end portion and the solid material of the thermosetting resin from the outside, and the solidification of the thermosetting resin is performed. This is a heating process in which the melted thermosetting resin is cured after the material is melted and the melted thermosetting resin is filled in a region covering the bare wire portion in the heat-shrinkable tube after shrinkage.
　本発明によれば、熱硬化性樹脂の固形物を使用し、流動性を有する止水剤を使用することなく、さらに、熱収縮チューブに対して開口を栓で閉じる加工を加えることなく、ワイヤハーネスにおける端部の裸線部分の防水を実現することができる。その結果、流動性を有する止水剤を取り扱うために必要となる各種の安全対策及び工程が簡素化される。さらに、ディスペンサ及び熱収縮チューブの開口を閉じる加工が不要となり、ワイヤハーネスの製造コストを低減できる。 According to the present invention, a wire of a thermosetting resin is used without using a water-stopping agent having fluidity, and further, without adding a process of closing the opening with a plug to the heat-shrinkable tube. Waterproofing of the bare wire portion at the end of the harness can be realized. As a result, various safety measures and processes required for handling fluid-proof water-stopping agents are simplified. Furthermore, it is not necessary to close the opening of the dispenser and the heat shrinkable tube, and the manufacturing cost of the wire harness can be reduced.
本発明の実施形態に係るワイヤハーネス１における末端防水部の断面図である。It is sectional drawing of the terminal waterproof part in the wire harness 1 which concerns on embodiment of this invention. ワイヤハーネス１の末端防水部の第１の製法における固形止水剤の投入工程を示す図である。It is a figure which shows the injection process of the solid waterproofing agent in the 1st manufacturing method of the terminal waterproof part of the wire harness. ワイヤハーネス１の末端防水部の第１の製法における電線束の挿入工程を示す図である。It is a figure which shows the insertion process of the wire bundle in the 1st manufacturing method of the terminal waterproof part of the wire harness. ワイヤハーネス１の末端防水部の第１の製法における加熱工程を示す図である。It is a figure which shows the heating process in the 1st manufacturing method of the terminal waterproof part of the wire harness. 筒状の固形止水剤の斜視図である。It is a perspective view of a cylindrical solid waterproofing agent. ワイヤハーネス１の末端防水部の第２の製法における固形止水剤の取付工程を示す図である。It is a figure which shows the attachment process of the solid waterproofing agent in the 2nd manufacturing method of the terminal waterproof part of the wire harness. ワイヤハーネス１の末端防水部の第２の製法における電線束の挿入工程を示す図である。It is a figure which shows the insertion process of the wire bundle in the 2nd manufacturing method of the terminal waterproof part of the wire harness. ワイヤハーネス１の末端防水部の第２の製法における加熱工程を示す図である。It is a figure which shows the heating process in the 2nd manufacturing method of the terminal waterproof part of the wire harness. 従来のワイヤハーネス１００の末端防水部の断面図である。It is sectional drawing of the terminal waterproof part of the conventional wire harness 100. FIG. 従来のワイヤハーネス１００の末端防水部の製法における加熱工程を示す図である。It is a figure which shows the heating process in the manufacturing method of the terminal waterproof part of the conventional wire harness 100. FIG.
　以下、添付の図面を参照しながら、本発明の実施形態について説明する。以下の実施形態は、本発明を具体化した一例であり、本発明の技術的範囲を限定する事例ではない。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The following embodiment is an example embodying the present invention, and is not an example of limiting the technical scope of the present invention.
　まず、図１を参照しつつ、本発明の実施形態に係るワイヤハーネス１における末端防水部５の構成について説明する。図１に示されるように、ワイヤハーネス１は、複数の電線９からなる電線束と、その電線束の端部における末端防水部５とを備える。末端防水部５は、電線束の端部における複数の裸線８と、それら複数の裸線８の末端が接合された末端スプライス部７と、絶縁被覆の端部９１とを含む電線束端部６を覆う構成を備えている。以下、電線束の端部における複数の裸線８と、それら複数の裸線８の末端が接合された末端スプライス部７とを合わせて接合裸線部７，８と称する。 First, the structure of the terminal waterproof part 5 in the wire harness 1 according to the embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, the wire harness 1 includes a wire bundle composed of a plurality of electric wires 9 and a terminal waterproof portion 5 at an end portion of the wire bundle. The terminal waterproof portion 5 includes a plurality of bare wires 8 at the end of the wire bundle, a terminal splice portion 7 where the ends of the plurality of bare wires 8 are joined, and an end portion 91 of the insulation coating. 6 is provided. Hereinafter, the plurality of bare wires 8 at the ends of the wire bundle and the end splice portion 7 where the ends of the plurality of bare wires 8 are joined together are referred to as joined bare wire portions 7 and 8.
　より具体的には、末端防水部５は、収縮後の熱収縮チューブ１０と硬化後止水剤２０とを備える。収縮後の熱収縮チューブ１０は、電線束端部６を内包し、加熱されることによって収縮した後の熱収縮チューブである。また、硬化後止水剤２０は、収縮後の熱収縮チューブ１０内において、接合裸線部７，８を覆って充填された単一の熱硬化性樹脂の硬化物である。単一の熱硬化性樹脂の硬化物とは、成分の異なる２種類以上の熱硬化性樹脂の硬化物が混在しておらず、同種の成分の熱硬化性樹脂の硬化物のみにより構成された物であることを意味する。また、硬化後止水剤２０は、収縮後の熱収縮チューブ１０に内包された電線束端部６以外の唯一の内包物である。即ち、末端防水部５は、図９に示される従来の末端防水部５００と比較し、収縮後の熱収縮チューブ１０内に電線束端部６及び硬化後止水剤２０以外の栓などの物質が存在しない点において異なっている。 More specifically, the terminal waterproof part 5 includes a heat-shrinkable tube 10 after shrinkage and a post-curing water-stopping agent 20. The heat-shrinkable tube 10 after shrinkage is a heat-shrinkable tube that contains the wire bundle end 6 and shrinks when heated. The post-curing water-stopping agent 20 is a cured product of a single thermosetting resin filled in the heat-shrinkable tube 10 after shrinkage so as to cover the bare bare wire portions 7 and 8. A cured product of a single thermosetting resin does not include two or more types of cured products of different thermosetting resins with different components, and is composed only of a cured product of the same type of thermosetting resin. Means a thing. In addition, the post-curing water-stopping agent 20 is the only inclusion other than the wire bundle end portion 6 included in the heat-shrinkable tube 10 after shrinkage. That is, the terminal waterproof part 5 is a substance such as a plug other than the wire bundle end part 6 and the post-curing water-stopping agent 20 in the heat-shrinkable tube 10 after contraction, as compared with the conventional terminal waterproof part 500 shown in FIG. Is different in that there is no.
　また、収縮後の熱収縮チューブ１０は、その末端側の一方の端１１から数ミリメートル程度の範囲を占める部分である小径筒部１３と、他方の端１２から数十ミリメートル程度の範囲を占める部分である大径筒部１４とが形成されている。大径筒部１４は、電線束端部６の周囲を覆う部分である。一方、小径筒部１３は、電線束端部６よりも末端側に位置して大径筒部１４よりも内径が小さい部分である。そして、単一の熱硬化性樹脂の硬化物である硬化後止水剤２０は、収縮後の熱収縮チューブ１０内における少なくとも大径筒部１４の接合裸線部７，８の周囲から小径筒部１３の一部までに渡る領域に充填されている。図１に示される例では、硬化後止水剤２０は、収縮後の熱収縮チューブ１０内における絶縁被覆の端部９１の一部から小径筒部１３の一部までに渡る領域に充填されている。 Further, the heat-shrinkable tube 10 after contraction has a small-diameter cylindrical portion 13 that occupies a range of about several millimeters from one end 11 on the end side thereof, and a portion that occupies a range of about tens of millimeters from the other end 12 The large-diameter cylindrical portion 14 is formed. The large diameter cylindrical portion 14 is a portion that covers the periphery of the wire bundle end portion 6. On the other hand, the small-diameter cylindrical portion 13 is a portion located on the terminal side of the wire bundle end portion 6 and having a smaller inner diameter than the large-diameter cylindrical portion 14. The post-curing water-stopping agent 20, which is a cured product of a single thermosetting resin, is a small-diameter cylinder from around the bare bare wire portions 7 and 8 of the large-diameter tubular portion 14 in the heat-shrinkable tube 10 after shrinkage. An area extending to a part of the portion 13 is filled. In the example shown in FIG. 1, the post-curing waterproofing agent 20 is filled in a region extending from a part of the end portion 91 of the insulating coating to a part of the small-diameter cylindrical portion 13 in the heat-shrinkable tube 10 after shrinkage. Yes.
　図１に示される末端防水部５は、収縮後の熱収縮チューブ１０内に充填された硬化後止水剤２０によって接合裸線部７，８が密封されているため、接合裸線部７，８は、雨滴及び結露などによる水分との接触が防がれる。また、収縮後の熱収縮チューブ１０は、電線束端部６における絶縁被覆の端部９１にほぼ密着した状態まで収縮しているため、外径が細い末端防水部５を実現することができる。その結果、末端防水部５を狭いスペースに配置することが可能となる。 Since the joint bare wire portions 7 and 8 are sealed by the post-curing water-stopping agent 20 filled in the heat-shrinkable tube 10 after shrinkage, the end waterproof portion 5 shown in FIG. 8 prevents contact with moisture due to raindrops and condensation. Moreover, since the heat-shrinkable tube 10 after shrinkage | contraction has contracted to the state which contact | adhered substantially to the edge part 91 of the insulation coating in the electric wire bundle edge part 6, the terminal waterproof part 5 with a thin outer diameter is realizable. As a result, the terminal waterproof part 5 can be arranged in a narrow space.
　＜＜末端防水部５の第１の製法＞＞
　次に、図２～図４を参照しつつ、ワイヤハーネス１の末端防水部５の第１の製法について説明する。なお、図２～図４は、第１の製法における固形止水剤の投入工程、電線束の挿入工程及び加熱工程が模式的に示された図である。末端防水部５の第１の製法は、以下の手順により実現される。 << First manufacturing method of terminal waterproofing part 5 >>
Next, a first manufacturing method of the terminal waterproof portion 5 of the wire harness 1 will be described with reference to FIGS. 2 to 4 are diagrams schematically showing a solid water-stopper charging step, an electric wire bundle insertion step, and a heating step in the first manufacturing method. The 1st manufacturing method of the terminal waterproof part 5 is implement | achieved by the following procedures.
　＜固形止水剤の投入工程＞
　まず、図２に示されるように、収縮前の熱収縮チューブ１０Ａ内に固形止水剤２１を投入する工程が実行される。収縮前の熱収縮チューブ１０Ａは、一方の端１１から数ミリメートル程度の範囲を占める部分である小径筒部１３と、他方の端１２から数十ミリメートル程度の範囲を占める部分である大径筒部１４とが形成されている。 <Solid water-stopper charging process>
First, as shown in FIG. 2, a step of introducing the solid water-stopping agent 21 into the heat-shrinkable tube 10A before shrinking is executed. The heat-shrinkable tube 10A before contraction is a small-diameter cylindrical part 13 that occupies a range of about several millimeters from one end 11 and a large-diameter cylindrical part that occupies a range of several tens of millimeters from the other end 12 14 are formed.
　熱収縮チューブ１０Ａは、例えば、ポリオレフィン、フッ素系樹脂、塩素系樹脂又は熱可塑性エラストマーなどの熱収縮性の筒状部材である。特に、熱収縮チューブ１０Ａとして、電子線架橋の処理が施されたポリオレフィンからなるチューブが採用されれば好適である。図２に示されるように、末端防水部５に採用される収縮前の熱収縮チューブ１０Ａは、両端１１，１２のいずれについても、栓などによって開口を閉鎖する加工は施されていない。 The heat-shrinkable tube 10A is a heat-shrinkable cylindrical member such as polyolefin, fluorine-based resin, chlorine-based resin, or thermoplastic elastomer. In particular, as the heat-shrinkable tube 10A, it is preferable to use a tube made of polyolefin that has been subjected to electron beam crosslinking treatment. As shown in FIG. 2, the heat-shrinkable tube 10 </ b> A before contraction employed in the terminal waterproofing unit 5 is not subjected to a process of closing the opening with a plug or the like at both ends 11 and 12.
　また、固形止水剤２１は、熱硬化性樹脂の固形物であり、例えば、エポキシ樹脂、フェノール樹脂又はユリア樹脂などの熱硬化性樹脂の粉末が押し固められることによって成形された固形物である。固形止水剤２１を構成する熱硬化性樹脂としては、加工性及び加熱により溶融したときの流動性に優れたエポキシ樹脂が採用されることが好適である。 The solid waterproofing agent 21 is a solid material of a thermosetting resin, for example, a solid material formed by pressing a powder of a thermosetting resin such as an epoxy resin, a phenol resin, or a urea resin. . As the thermosetting resin constituting the solid water-stopping agent 21, it is preferable to employ an epoxy resin excellent in workability and fluidity when melted by heating.
　また、固形止水剤２１の外形は、小径筒部１３の内径よりも大きな幅、かつ、大径筒部１４の内径よりも小さな幅で形成されている。固形止水剤の投入工程では、収縮前の熱収縮チューブ１０Ａが、大径筒部１４側の端１２が上方となるように保持され、固形止水剤２１は、大径筒部１４側の端１２の開口から収縮前の熱収縮チューブ１０Ａの大径筒部１４内へ投入される。これにより、固形止水剤２１は大径筒部１４内に留まる。固形止水剤２１の外形は、円柱状又は四角柱状など、各種の形状であることが考えられる。図２に示される固形止水剤２１は、円柱における底面の角部が面取りされた形状を有している。 The outer shape of the solid water-stopping agent 21 is formed with a width larger than the inner diameter of the small-diameter cylindrical portion 13 and a width smaller than the inner diameter of the large-diameter cylindrical portion 14. In the charging step of the solid water-stopping agent, the heat-shrinkable tube 10A before shrinkage is held so that the end 12 on the large-diameter cylindrical portion 14 side is upward, and the solid water-stopping agent 21 is on the large-diameter cylindrical portion 14 side. It is thrown into the large diameter cylindrical portion 14 of the heat shrinkable tube 10A before shrinkage from the opening of the end 12. Thereby, the solid waterproofing agent 21 stays in the large diameter cylindrical portion 14. It is conceivable that the solid water-stopping agent 21 has various shapes such as a columnar shape or a quadrangular prism shape. The solid waterproofing agent 21 shown in FIG. 2 has a shape in which the corners of the bottom surface of the cylinder are chamfered.
　＜電線束の挿入工程＞
　次に、図３に示されるように、固形止水剤２１が投入された大径筒部１４内に、電線束端部６を挿入する工程が実行される。これにより、収縮前の熱収縮チューブ１０Ａは、電線束端部６と単一の組成の熱硬化性樹脂からなる固形止水剤２１とのみを内包する状態となる。なお、固形止水剤の投入工程及び電線束の挿入工程は、収縮前の熱収縮チューブ１０Ａの大径筒部１４内に、電線束端部６と固形止水剤２１（熱硬化性樹脂の固形物）とを挿入する挿入工程の一例である。 <Wire bundle insertion process>
Next, as shown in FIG. 3, a step of inserting the wire bundle end portion 6 into the large-diameter cylindrical portion 14 into which the solid water-stopping agent 21 is charged is executed. Thereby, 10 A of heat-shrinkable tubes before shrinking will be in the state which includes only the wire bundle edge part 6 and the solid waterproofing agent 21 which consists of a thermosetting resin of a single composition. In addition, the charging step of the solid water-stopping agent and the insertion step of the electric wire bundle are performed in the large-diameter cylindrical portion 14 of the heat-shrinkable tube 10A before shrinkage in the wire bundle end portion 6 and the solid water-stopping agent 21 (of the thermosetting resin). It is an example of the insertion process which inserts a solid substance.
　また、電線束の挿入工程において、電線束端部６の先端、即ち、末端スプライス部７の先端が、固形止水剤２１に当接する位置まで挿入されることが考えられる。また、固形止水剤２１の中央部に、収縮前の熱収縮チューブ１０Ａ内に挿入された電線束端部６の先端が嵌り込む窪みが形成されることも考えられる。これらにより、収縮前の熱収縮チューブ１０Ａ内における固形止水剤２１及び電線束端部６の位置が安定し、末端防水部５の品質が安定する。 Also, in the wire bundle insertion process, it is conceivable that the tip of the wire bundle end 6, that is, the tip of the terminal splice portion 7 is inserted to a position where it contacts the solid water-stopping agent 21. Moreover, it is also conceivable that a recess into which the tip of the wire bundle end portion 6 inserted into the heat-shrinkable tube 10A before shrinkage fits is formed in the central portion of the solid water-stopping agent 21. By these, the position of the solid waterproofing agent 21 and the wire bundle end part 6 in the heat-shrinkable tube 10A before contraction is stabilized, and the quality of the terminal waterproof part 5 is stabilized.
　＜加熱工程＞
　最後に、電線束端部６及び固形止水剤２１のみを内包する収縮前の熱収縮チューブ１０Ａを外側からヒータ５０によって加熱する工程が実行される。この加熱工程は、加熱により、熱収縮チューブ１０Ａを収縮させるとともに、固形止水剤２１を溶融させ、溶融した止水剤（熱硬化性樹脂）を熱収縮チューブ１０Ａ内における接合裸線部７，８を覆う領域に充満させた後に、溶融した止水剤を硬化させる工程である。 <Heating process>
Finally, the process of heating the heat-shrinkable tube 10A before shrinkage containing only the wire bundle end portion 6 and the solid waterproofing agent 21 from the outside by the heater 50 is executed. In this heating step, the heat-shrinkable tube 10A is contracted by heating, the solid water-stopping agent 21 is melted, and the molten water-stopping agent (thermosetting resin) is joined to the bare bare wire portion 7 in the heat-shrinkable tube 10A. 8 is a step of curing the melted water-stopping agent after the region covering 8 is filled.
　ヒータ５０は、熱収縮チューブ１０Ａの収縮温度以上、かつ、固形止水剤２１の溶融温度以上の温度での加熱を行う。また、加熱のパワーを位置ごとに調節可能なヒータ５０を用いることにより、熱収縮チューブ１０Ａにおける固形止水剤２１の周囲の位置を、それ以外の位置よりも高い温度で加熱することも考えられる。このような加熱は、固形止水剤２１の溶融温度が、熱収縮チューブ１０Ａの収縮温度よりも高い場合に有効である。 The heater 50 performs heating at a temperature equal to or higher than the contraction temperature of the heat-shrinkable tube 10 </ b> A and equal to or higher than the melting temperature of the solid water-stopping agent 21. Further, by using the heater 50 capable of adjusting the heating power for each position, it is possible to heat the position around the solid waterproofing agent 21 in the heat-shrinkable tube 10A at a temperature higher than the other positions. . Such heating is effective when the melting temperature of the solid waterproofing agent 21 is higher than the contraction temperature of the heat-shrinkable tube 10A.
　上記の加熱工程により、溶融した液状の止水剤は、毛細管現象により、収縮した熱収縮チューブ１０内の狭い隙間を満たしつつ上昇する。また、溶融した液状の止水剤は、毛細管現象による上方への吸引力により、熱収縮チューブ１０の下部の小径筒部１３の開口から漏れ出さず、液位は小径筒部１３内で保持される。その結果、溶融した液状の止水剤は、図１に示されるように、収縮後の熱収縮チューブ１０内における絶縁被覆の端部９１の一部から小径筒部１３の一部までに渡る領域に充填された硬化後止水剤２０へ変化する。 In the above heating process, the melted liquid water-stopping agent rises while filling a narrow gap in the contracted heat-shrinkable tube 10 due to a capillary phenomenon. Further, the melted liquid water-stopping agent does not leak from the opening of the small-diameter cylindrical portion 13 below the heat shrinkable tube 10 due to the upward suction force due to the capillary phenomenon, and the liquid level is held in the small-diameter cylindrical portion 13. The As a result, as shown in FIG. 1, the molten liquid water-stopping agent is a region extending from a part of the end portion 91 of the insulating coating to a part of the small-diameter cylindrical portion 13 in the heat-shrinkable tube 10 after the contraction. It changes to the water stop agent 20 after hardening with which it filled.
　以上に示された第１の製法においては、熱硬化性樹脂の固形物である固形止水剤２１が使用され、流動性を有する止水剤を使用することなく、さらに、収縮前の熱収縮チューブ１０Ａに対して開口を栓で閉じる加工を加えることなく、ワイヤハーネス１における接合裸線部７，８の防水を実現することができる。その結果、流動性を有する止水剤を取り扱うために必要となる各種の安全対策及び工程が簡素化される。 In the 1st manufacturing method shown above, the solid water-stopping agent 21 which is a solid substance of a thermosetting resin is used, and also the heat shrink before shrinkage | contraction without using the water-stopping agent which has fluidity | liquidity. Waterproofing of the joint bare wire portions 7 and 8 in the wire harness 1 can be realized without adding processing for closing the opening to the tube 10A with a stopper. As a result, various safety measures and processes required for handling fluid-proof water-stopping agents are simplified.
　例えば、液状の止水剤の保管場所及び搬送器具などにおいて、止水剤の漏出防止機構を設けるなどの特別な安全対策は不要である。また、ワイヤハーネス１の製造現場において、液状の止水剤を一定量ずつ供給するディスペンサ及びそのディスペンサによる止水剤の供給工程は不要である。さらに、収縮前の熱収縮チューブ１０Ａの開口を閉じる加工も不要である。そのため、ワイヤハーネス１の製造コストを低減できる。 For example, no special safety measures such as providing a water-stopper leakage prevention mechanism are required in storage locations for liquid water-stoppers and transport equipment. Moreover, in the manufacturing site of the wire harness 1, the dispenser which supplies a fixed amount of liquid waterproofing agents and the supply process of the waterproofing agent by the dispenser are unnecessary. Furthermore, it is not necessary to close the opening of the heat-shrinkable tube 10A before shrinkage. Therefore, the manufacturing cost of the wire harness 1 can be reduced.
　＜＜末端防水部５の第２の製法＞＞
　次に、図５～図８を参照しつつ、ワイヤハーネス１の末端防水部５の第２の製法について説明する。なお、図５は、第２の製法に用いられる固形止水剤２１の一例の斜視図である。また、図６～図８は、第２の製法における固形止水剤の取付工程、電線束の挿入工程及び加熱工程が模式的に示された図である。 << Second manufacturing method of terminal waterproofing part 5 >>
Next, a second manufacturing method of the terminal waterproof portion 5 of the wire harness 1 will be described with reference to FIGS. FIG. 5 is a perspective view of an example of the solid waterproofing agent 21 used in the second manufacturing method. FIGS. 6 to 8 are diagrams schematically showing a solid water-stopper attaching step, a wire bundle inserting step, and a heating step in the second manufacturing method.
　末端防水部５の第２の製法においては、図５に示されるような孔２１１が形成された熱硬化性樹脂の固形物である筒状の固形止水剤２１が用いられる。固形止水剤２１に形成された孔２１１は、電線束端部６が通される孔である。末端防水部５の第２の製法は、以下の手順により実現される。 In the second manufacturing method of the terminal waterproof part 5, a cylindrical solid water-stopping agent 21, which is a solid material of a thermosetting resin having holes 211 as shown in FIG. 5, is used. A hole 211 formed in the solid waterproofing agent 21 is a hole through which the wire bundle end portion 6 is passed. The 2nd manufacturing method of the terminal waterproof part 5 is implement | achieved by the following procedures.
　＜固形止水剤の取付工程＞
　まず、図６に示されるように、筒状の固形止水剤２１の孔２１１に電線束端部６を通すことにより電線束端部６に固形止水剤２１を取り付ける工程が実行される。固形止水剤の取付工程により、固形止水剤２１は、電線束端部６における予め定められた位置に保持される。なお、第１の製法及び第２の製法各々において、固形止水剤２１の材質は同じである。 <Attachment process of solid waterproofing agent>
First, as shown in FIG. 6, the step of attaching the solid waterstop 21 to the wire bundle end 6 by passing the wire bundle end 6 through the hole 211 of the cylindrical solid waterstopper 21 is executed. The solid water stopping agent 21 is held at a predetermined position in the wire bundle end 6 by the solid water stopping agent attaching step. In addition, in each of the first manufacturing method and the second manufacturing method, the material of the solid waterproofing agent 21 is the same.
　＜電線束の挿入工程＞
　次に、図７に示されるように、固形止水剤２１が取り付けられた電線束端部６を、収縮前の熱収縮チューブ１０Ａの大径筒部１４内に挿入する工程が実行される。これにより、収縮前の熱収縮チューブ１０Ａは、電線束端部６と単一の組成の熱硬化性樹脂からなる固形止水剤２１とのみを内包する状態となる。また、第２の製法においては、固形止水剤２１が、電線束端部６における予め定められた位置に取り付けられた状態で、電線束端部６が収縮前の熱収縮チューブ１０Ａ内に挿入される。そのため、固形止水剤２１と電線束端部６との位置が安定し、末端防水部５の品質が安定する。 <Wire bundle insertion process>
Next, as shown in FIG. 7, a step of inserting the wire bundle end portion 6 to which the solid waterproofing agent 21 is attached into the large-diameter cylindrical portion 14 of the heat-shrinkable tube 10 </ b> A before shrinking is executed. Thereby, 10 A of heat-shrinkable tubes before shrinking will be in the state which includes only the wire bundle edge part 6 and the solid waterproofing agent 21 which consists of a thermosetting resin of a single composition. In the second manufacturing method, the wire bundle end portion 6 is inserted into the heat-shrinkable tube 10A before contraction in a state where the solid waterproofing agent 21 is attached to a predetermined position in the wire bundle end portion 6. Is done. Therefore, the position of the solid waterproofing agent 21 and the wire bundle end portion 6 is stabilized, and the quality of the terminal waterproof portion 5 is stabilized.
　この第２の製法に用いられる収縮前の熱収縮チューブ１０Ａは、第１製法において用いられる収縮前の熱収縮チューブ１０Ａと同じものである。また、この第２の製法においても、固形止水剤２１が取り付けられた電線束端部６は、大径筒部１４側の端１２の開口から収縮前の熱収縮チューブ１０Ａの大径筒部１４内へ挿入される。また、第２の製法においては、収縮前の熱収縮チューブ１０Ａは、大径筒部１４側の端１２が上方となるように保持される場合と、大径筒部１４側の端１２が下方となるように保持される場合とが考えられる。なお、第２の製法において、固形止水剤の取付工程及び電線束の挿入工程は、収縮前の熱収縮チューブ１０Ａの大径筒部１４内に、電線束端部６と固形止水剤２１（熱硬化性樹脂の固形物）とを挿入する挿入工程の一例である。 The heat-shrinkable tube 10A before shrinkage used in the second production method is the same as the heat-shrinkable tube 10A before shrinkage used in the first production method. Also in this second manufacturing method, the wire bundle end 6 to which the solid waterproofing agent 21 is attached is the large-diameter cylindrical portion of the heat-shrinkable tube 10A before contraction from the opening of the end 12 on the large-diameter cylindrical portion 14 side. 14 is inserted. Further, in the second manufacturing method, the heat-shrinkable tube 10A before contraction is held such that the end 12 on the large-diameter cylindrical portion 14 side is upward, and the end 12 on the large-diameter cylindrical portion 14 side is downward. The case where it hold | maintains so that it may become is considered. In the second manufacturing method, the step of attaching the solid water-stopping agent and the step of inserting the wire bundle include the wire bundle end portion 6 and the solid water-stopping agent 21 in the large-diameter cylindrical portion 14 of the heat-shrinkable tube 10A before shrinkage. It is an example of the insertion process which inserts (solid material of a thermosetting resin).
　＜加熱工程＞
　最後に、電線束端部６及び固形止水剤２１のみを内包する収縮前の熱収縮チューブ１０Ａを外側からヒータ５０によって加熱する工程が実行される。この第２の製法における加熱工程は、第１の製法における加熱工程（図４）と比較して、加熱開始時点での熱収縮チューブ１０Ａ内における電線束端部６と固形止水剤２１との位置関係が異なるのみである。従って、図８に示される加熱工程により、熱収縮チューブ１０Ａが収縮し、固形止水剤２１が溶融し、溶融した止水剤（熱硬化性樹脂）が熱収縮チューブ１０Ａ内における接合裸線部７，８を覆う領域に充満し、その後、溶融した止水剤が硬化する。 <Heating process>
Finally, the process of heating the heat-shrinkable tube 10A before shrinkage containing only the wire bundle end portion 6 and the solid waterproofing agent 21 from the outside by the heater 50 is executed. Compared with the heating process in the first manufacturing method (FIG. 4), the heating process in the second manufacturing method includes the wire bundle end 6 and the solid waterproofing agent 21 in the heat-shrinkable tube 10 </ b> A at the start of heating. Only the positional relationship is different. Therefore, the heat shrinkable tube 10A shrinks by the heating step shown in FIG. 8, the solid water-stopping agent 21 melts, and the melted water-stopping agent (thermosetting resin) is joined to the bare wire portion in the heat-shrinkable tube 10A. The area covering 7 and 8 is filled, and then the molten water-stopping agent is cured.
　以上に示した第２の製法によっても、第１の製法が採用された場合と同様に、図１に示されるワイヤハーネス１の末端防水部５が製造される。また、第２の製法によっても、第１の製法と同様の作用及び効果が得られる。 Also by the 2nd manufacturing method shown above, the terminal waterproof part 5 of the wire harness 1 shown by FIG. 1 is manufactured similarly to the case where the 1st manufacturing method is employ | adopted. Also, the second manufacturing method can provide the same operations and effects as the first manufacturing method.
　１　ワイヤハーネス
　５　末端防水部
　６　電線束端部
　７　末端スプライス部（接合裸線部）
　８　裸線（接合裸線部）
　９　電線
　１０　収縮後の熱収縮チューブ
　１０Ａ　収縮前の熱収縮チューブ
　１３　小径筒部
　１４　大径筒部
　２０　硬化後止水剤
　２１　固形止水剤
　５０　ヒータ
　９１　絶縁被覆の端部
　２１１　孔 DESCRIPTION OF SYMBOLS 1 Wire harness 5 Terminal waterproof part 6 Electric wire bundle end part 7 Terminal splice part (joining bare wire part)
8 Bare wire (joining bare wire part)
9 electric wire 10 heat-shrinkable tube after shrinkage 10A heat-shrinkable tube before shrinkage 13 small-diameter cylinder part 14 large-diameter cylinder part 20 post-curing water-stopping agent 21 solid water-stopping agent 50 heater 91 end of insulating coating 211 hole

Claims (3)

  1. 　電線束（９）と、該電線束（９）の端部における複数の裸線（８）及び該複数の裸線の末端が接合された接合部からなる接合裸線部（７）を含む電線束端部（６）を覆う末端防水部（５）と、を備えたワイヤハーネスであって、
    　前記末端防水部（５）は、
    　前記電線束端部（６）を内包し、加熱されることによって収縮した後の熱収縮チューブ（１０）と、
    　前記熱収縮チューブ（１０）に内包された前記電線束端部（６）以外の唯一の内包物であり、前記熱収縮チューブ（１０）内において前記接合裸線部（７）を覆って充填された単一の熱硬化性樹脂の硬化物（２０）と、を備えることを特徴とするワイヤハーネス（１）。     An electric wire including an electric wire bundle (9), a plurality of bare wires (8) at an end portion of the electric wire bundle (9), and a joined bare wire portion (7) composed of a joined portion in which ends of the plural bare wires are joined A wire harness comprising a terminal waterproof portion (5) covering the bundle end portion (6),
    The terminal waterproof part (5)
    A heat-shrinkable tube (10) containing the wire bundle end (6) and contracted by being heated;
    It is the only inclusion other than the wire bundle end (6) contained in the heat shrinkable tube (10), and is filled in the heat shrinkable tube (10) so as to cover the joint bare wire portion (7). A wire harness (1) comprising: a cured product (20) of a single thermosetting resin.
  2. 　前記熱収縮チューブ（１０）は、前記電線束端部（６）の周囲を覆う大径筒部（１４）と前記電線束端部よりも末端側に位置して前記大径筒部（１４）よりも内径が小さい部分である小径筒部（１３）とが形成されており、
    　前記単一の熱硬化性樹脂の硬化物（２０）は、前記熱収縮チューブ（１０）内における少なくとも前記大径筒部（１４）の前記接合裸線部（７）の周囲から前記小径筒部（１３）の一部までに渡る領域に充填されている、請求項１に記載のワイヤハーネス（１）。     The heat-shrinkable tube (10) includes a large-diameter cylindrical portion (14) that covers the periphery of the wire bundle end portion (6), and a large-diameter cylindrical portion (14) that is located on the distal side of the wire bundle end portion. A small-diameter cylindrical portion (13) having a smaller inner diameter than the inner diameter,
    The cured product (20) of the single thermosetting resin is formed from the circumference of the bare bare wire portion (7) of at least the large diameter cylindrical portion (14) in the heat shrinkable tube (10). The wire harness (1) according to claim 1, wherein a region extending to a part of (13) is filled.
  3. 　電線束（９）と、該電線束（９）の端部における複数の裸線（８）及び該複数の裸線の末端が接合された接合部からなる接合裸線部（７）を含む電線束端部（６）を覆う末端防水部（５）と、を備えたワイヤハーネス（１）の製造方法であって、
    　第１の端から所定の範囲を占める大径筒部（１４）と第２の端から所定の範囲を占め前記大径筒部（１４）よりも内径が小さい小径筒部（１３）とが形成された収縮前の熱収縮チューブ（１０Ａ）における前記大径筒部内（１４）に、前記電線束端部（６）と熱硬化性樹脂の固形物（２１）とを挿入する挿入工程と、
    　前記電線束端部（６）及び熱硬化性樹脂の固形物（２１）のみを内包する前記熱収縮チューブ（１０Ａ）を外側から加熱することにより、前記熱収縮チューブ（１０Ａ）を収縮させるとともに、前記熱硬化性樹脂の固形物（２１）を溶融させ、溶融した前記熱硬化性樹脂を収縮後の前記熱収縮チューブ（１０）内における前記接合裸線部（７）を覆う領域に充満させた後に、溶融した熱硬化性樹脂を硬化させる加熱工程と、を有することを特徴とするワイヤハーネスの製造方法。     An electric wire including an electric wire bundle (9), a plurality of bare wires (8) at an end portion of the electric wire bundle (9), and a joined bare wire portion (7) composed of joint portions joined to ends of the plural bare wires A waterproofing end (5) covering the bundle end (6), and a method of manufacturing a wire harness (1) comprising:
    A large-diameter cylindrical portion (14) occupying a predetermined range from the first end and a small-diameter cylindrical portion (13) occupying a predetermined range from the second end and having a smaller inner diameter than the large-diameter cylindrical portion (14) are formed. An insertion step of inserting the wire bundle end portion (6) and the thermosetting resin solid material (21) into the large-diameter cylindrical portion (14) of the heat-shrinkable tube (10A) before shrinkage,
    While heating the heat-shrinkable tube (10A) containing only the wire bundle end (6) and the solid (21) of the thermosetting resin from the outside, the heat-shrinkable tube (10A) is contracted, The solid body (21) of the thermosetting resin was melted, and the melted thermosetting resin was filled in an area covering the joint bare wire portion (7) in the heat shrinkable tube (10) after shrinkage. And a heating step for curing the melted thermosetting resin later.
PCT/JP2010/067840 2010-06-25 2010-10-12 Wire harness and method for manufacturing same WO2011161840A1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3668269A1 (en) * 2018-12-13 2020-06-17 Nexans End cap arrangement for sealing off an end portion of a heating cable and method
CN111742452A (en) * 2019-01-09 2020-10-02 深圳市大疆创新科技有限公司 Connecting wire, optical measurement device and mobile platform

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008099674A1 (en) * 2007-02-16 2008-08-21 Tyco Electronics Amp K.K. Waterproof material for harness and method for manufacturing waterproof harness
JP2010061926A (en) * 2008-09-02 2010-03-18 Autonetworks Technologies Ltd Method of waterproofing shielded wire

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008099674A1 (en) * 2007-02-16 2008-08-21 Tyco Electronics Amp K.K. Waterproof material for harness and method for manufacturing waterproof harness
JP2010061926A (en) * 2008-09-02 2010-03-18 Autonetworks Technologies Ltd Method of waterproofing shielded wire

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3668269A1 (en) * 2018-12-13 2020-06-17 Nexans End cap arrangement for sealing off an end portion of a heating cable and method
CN111742452A (en) * 2019-01-09 2020-10-02 深圳市大疆创新科技有限公司 Connecting wire, optical measurement device and mobile platform

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