JP6210641B2 - Covered wire intermediate material, covered wire, method for manufacturing covered wire, and wire harness - Google Patents

Covered wire intermediate material, covered wire, method for manufacturing covered wire, and wire harness Download PDF

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JP6210641B2
JP6210641B2 JP2014191255A JP2014191255A JP6210641B2 JP 6210641 B2 JP6210641 B2 JP 6210641B2 JP 2014191255 A JP2014191255 A JP 2014191255A JP 2014191255 A JP2014191255 A JP 2014191255A JP 6210641 B2 JP6210641 B2 JP 6210641B2
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electric wire
covering portion
covered electric
strands
wire
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JP2016062815A (en
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川口　智博
智博 川口
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Yazaki Corp
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    • 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

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Description

本発明は、被覆電線中間材と、当該被覆電線中間材を加工してなる被覆電線と、被覆電線の製造方法と、前記被覆電線を備えるワイヤハーネスに関する。   The present invention relates to a covered electric wire intermediate material, a covered electric wire formed by processing the covered electric wire intermediate material, a method for manufacturing the covered electric wire, and a wire harness including the covered electric wire.

従来、車両等に配索されるワイヤハーネスに用いられる被覆電線は、車両等環境下において内部に水が浸入して不具合が発生する可能性があり、止水性を向上させた被覆電線が種々提案されている（例えば、特許文献１参照）。特許文献１に記載の被覆電線７００は、図９に示すように、複数の導体素線を撚り合わせた中空の撚線導体７０１と、撚線導体７０１の中空部分がポリエチレン化合物により充填された気密部７０２と、撚線導体７０１の外周面を被覆する絶縁体７０３と、を備えている。被覆電線７００は、絶縁体７０３を押出被覆するときに撚線導体７０１の内部に配置されたポリエチレン化合物を膨張させることにより、撚線導体７０１の内部に充填された気密部７０２が形成され、止水性を向上させることができる。   Conventionally, coated wires used in wire harnesses routed in vehicles, etc., may cause problems due to water intruding into the environment in vehicles, etc., and various covered wires with improved water-stopping have been proposed. (For example, refer to Patent Document 1). As shown in FIG. 9, the covered electric wire 700 described in Patent Document 1 includes a hollow stranded wire conductor 701 in which a plurality of conductor strands are twisted together, and an airtight structure in which a hollow portion of the stranded wire conductor 701 is filled with a polyethylene compound. A portion 702 and an insulator 703 that covers the outer peripheral surface of the stranded wire conductor 701 are provided. In the covered electric wire 700, an airtight portion 702 filled in the stranded wire conductor 701 is formed by inflating the polyethylene compound disposed in the stranded wire conductor 701 when the insulator 703 is extrusion-coated, thereby stopping the insulation wire 701. Aqueous property can be improved.

特開２００５−１９３９２号公報JP 2005-19392 A

しかしながら、被覆電線７００においては、気密部７０２により止水性を向上させることはできるが、長手方向の一部に気密部７０２が設けられる構成では、被覆電線７００の製造段階であらかじめ止水位置を決めて製造する必要があり、ワイヤハーネスを製造するときに所望の位置で止水することができないという問題があった。   However, in the covered electric wire 700, the water tightness can be improved by the airtight portion 702. However, in the configuration in which the airtight portion 702 is provided in a part of the longitudinal direction, the water stop position is determined in advance at the manufacturing stage of the covered electric wire 700. There is a problem that water cannot be stopped at a desired position when the wire harness is manufactured.

従って、本発明は、上記のような問題点に着目し、所望の位置で簡易な加工により止水性を向上させることができる被覆電線中間材、被覆電線、被覆電線の製造方法及びワイヤハーネスを提供することを目的とする。   Accordingly, the present invention provides a covered electric wire intermediate material, a covered electric wire, a method for manufacturing the covered electric wire, and a wire harness capable of improving water-stopping properties by simple processing at a desired position, paying attention to the above-described problems. The purpose is to do.

上記課題を解決するために、請求項１に記載された発明は、加工されることにより被覆電線となる被覆電線中間材であって、複数の素線と、前記複数の素線を内側に収容した絶縁性合成樹脂からなるチューブ形状の被覆部と、を有し、前記被覆部が、該被覆部の周囲から前記被覆部の長手方向について部分的に加熱圧縮されることにより溶融されて、溶融された前記被覆部の一部が前記複数の素線の間隙に浸透するように構成されていることを特徴とする被覆電線中間材である。   In order to solve the above-mentioned problem, the invention described in claim 1 is a coated wire intermediate material that becomes a coated wire by being processed, and accommodates a plurality of strands and the plurality of strands inside. A tube-shaped covering portion made of an insulating synthetic resin, and the covering portion is melted by being partially heated and compressed in the longitudinal direction of the covering portion from the periphery of the covering portion. A part of the covered portion thus formed is configured to penetrate into the gaps between the plurality of strands.

請求項２に記載された発明は、請求項１に記載された発明において、前記被覆部の外周面全体に重ねて設けられ、前記被覆部よりも融点が高い材料からなる外層被覆部をさらに有していることを特徴とするものである。   According to a second aspect of the present invention, in the first aspect of the present invention, the outer covering portion further includes an outer covering portion made of a material having a melting point higher than that of the covering portion. It is characterized by that.

請求項３に記載された発明は、請求項１又は２に記載の被覆電線中間材を加工してなる被覆電線であって、前記被覆部の周囲から前記被覆部の長手方向について部分的に加熱圧縮して、前記被覆部を溶融してその一部を前記複数の素線の間隙に浸透させたのち溶融させた前記被覆部を固化させた止水部を設けたことを特徴とする被覆電線である。   The invention described in claim 3 is a covered electric wire obtained by processing the covered electric wire intermediate material according to claim 1 or 2, and is partially heated from the periphery of the covering portion in the longitudinal direction of the covering portion. A covered electric wire provided with a water stop portion that compresses and melts the covering portion, partially infiltrates the gap between the plurality of strands, and solidifies the molten covering portion It is.

請求項４に記載された発明は、請求項３に記載された発明において、前記止水部が端末よりも前記長手方向内側の位置に設けられていることを特徴とするものである。   The invention described in claim 4 is characterized in that, in the invention described in claim 3, the water stop portion is provided at a position inside the longitudinal direction from the terminal.

請求項５に記載された発明は、請求項３又は４に記載された発明において、前記止水部が複数設けられていることを特徴とするものである。   The invention described in claim 5 is the invention described in claim 3 or 4, wherein a plurality of the water stop portions are provided.

請求項６に記載された発明は、請求項３〜５のいずれか１項に記載の被覆電線を備えることを特徴とするワイヤハーネスである。   The invention described in claim 6 is a wire harness including the covered electric wire according to any one of claims 3 to 5.

請求項７に記載された発明は、複数の素線と、前記複数の素線を内側に収容した絶縁性合成樹脂からなるチューブ形状の被覆部と、を有する被覆電線中間材を加工して被覆電線を製造する被覆電線の製造方法であって、前記被覆部を周囲から前記被覆部の長手方向について部分的に加熱圧縮することにより溶融させてその一部を前記複数の素線の間隙に浸透させる加熱圧縮工程と、溶融させた前記被覆部を固化させて、前記止水部を形成する止水部形成工程と、を含むことを特徴とする被覆電線の製造方法である。   The invention described in claim 7 is obtained by processing and covering a covered electric wire intermediate material having a plurality of strands and a tube-shaped covering portion made of an insulating synthetic resin containing the plurality of strands inside. A method of manufacturing a covered electric wire for manufacturing an electric wire, wherein the covering portion is melted by partially heating and compressing the surrounding portion in the longitudinal direction of the covering portion, and a part thereof penetrates into the gaps of the plurality of strands. A method for producing a covered electric wire, comprising: a heat compression step for forming a water stop portion and a water stop portion forming step for solidifying the melted cover portion to form the water stop portion.

請求項１に記載された発明によれば、複数の素線と、前記複数の素線を内側に収容した絶縁性合成樹脂からなるチューブ形状の被覆部と、を有し、前記被覆部が、該被覆部の周囲から前記被覆部の長手方向について部分的に加熱圧縮されることにより溶融されて、溶融された前記被覆部の一部が前記複数の素線の間隙に浸透するように構成されている。このことから、被覆部の周囲から加熱圧縮して複数の素線の間隙に溶融された被覆部を浸透させることにより、加熱圧縮加工した部分においてその後に固化した被覆部によって止水することができ、所望の位置で簡易な加工により止水性を向上させることができる。   According to the invention described in claim 1, it has a plurality of strands and a tube-shaped covering portion made of an insulating synthetic resin containing the plurality of strands inside, and the covering portion is The coating portion is melted by being partially heated and compressed in the longitudinal direction of the covering portion from the periphery of the covering portion, and a part of the melted covering portion penetrates into the gaps of the plurality of strands. ing. From this, by heat-compressing from the periphery of the coating portion and infiltrating the molten coating portion into the gaps between the plurality of strands, water can be stopped by the coating portion solidified thereafter in the heat-compressed portion. The water stoppage can be improved by simple processing at a desired position.

請求項２に記載された発明によれば、前記被覆部の外周面全体に重ねて設けられ、前記被覆部よりも融点が高い材料からなる外層被覆部をさらに有している。このことから、外部被覆部を設けることにより、被覆電線の配索環境に合わせて適切な材料を用いて被覆部の外周面を被覆することができ、より経時劣化し難い被覆電線の被覆電線中間材を提供することができる。   According to the invention described in claim 2, the outer covering portion further includes an outer covering portion that is provided over the entire outer peripheral surface of the covering portion and made of a material having a melting point higher than that of the covering portion. For this reason, by providing an outer covering, the outer peripheral surface of the covering can be covered with an appropriate material according to the routing environment of the covered electric wire, and the covered electric wire intermediate of the covered electric wire is less likely to deteriorate over time. Material can be provided.

請求項３に記載された発明によれば、前記被覆部の周囲から前記被覆部の長手方向について部分的に加熱圧縮して、前記被覆部を溶融してその一部を前記複数の素線の間隙に浸透させたのち溶融させた前記被覆部を固化させた止水部が設けられていることから、所望の位置で簡易な加工により止水性を向上させることができる。   According to the invention described in claim 3, the coating portion is partially heated and compressed from the periphery of the coating portion in the longitudinal direction, the coating portion is melted, and a part thereof is formed of the plurality of strands. Since the water-stopping portion obtained by solidifying the coating portion that has been infiltrated into the gap and then melted is provided, the water-stopping property can be improved by simple processing at a desired position.

請求項４に記載された発明によれば、前記止水部が端末よりも前記長手方向内側の位置に設けられていることから、被覆部を皮むきにより簡易に除去することができ、端末加工性を良好にすることができる。   According to the invention described in claim 4, since the water stop portion is provided at a position on the inner side in the longitudinal direction from the terminal, the covering portion can be easily removed by peeling, and the terminal processing Property can be improved.

請求項５に記載された発明によれば、止水部が複数設けられていることから、より確実に止水することができ、被覆電線の止水信頼性を向上させることができる。   According to the invention described in claim 5, since a plurality of water stop portions are provided, water can be stopped more reliably, and the water stop reliability of the covered electric wire can be improved.

請求項６に記載された発明によれば、請求項３〜５のいずれか１項に記載の被覆電線を備えることから、ワイヤハーネスを構成する被覆電線の止水性を所望の位置において向上させることができる。また、簡易な加工により止水性を向上させることができることから、これまでのように専用の加工スペース／工程を設けるほかにワイヤハーネス製造時にライン上で加工することができる。   According to the invention described in claim 6, since the covered electric wire according to any one of claims 3 to 5 is provided, the water stoppage of the covered electric wire constituting the wire harness is improved at a desired position. Can do. In addition, since the water stoppage can be improved by simple processing, in addition to providing a dedicated processing space / process as in the past, processing can be performed on the line at the time of manufacturing the wire harness.

請求項７に記載された発明によれば、前記被覆部を周囲から前記被覆部の長手方向について部分的に加熱圧縮することにより溶融させてその一部を前記複数の素線の間隙に浸透させる加熱圧縮工程と、溶融させた前記被覆部を固化させて、前記止水部を形成する止水部形成工程と、を含むことから、所望の位置で止水性を向上させた被覆電線を簡易な加工により製造することができる。   According to the seventh aspect of the present invention, the covering portion is melted by partially heating and compressing the covering portion from the periphery in the longitudinal direction of the covering portion, and a part thereof penetrates into the gaps of the plurality of strands. Since it includes a heat compression step and a water stopping portion forming step of solidifying the melted covering portion to form the water stopping portion, a covered electric wire with improved water stopping at a desired position can be easily obtained. It can be manufactured by processing.

本発明の第一実施携帯にかかるワイヤハーネスを示す図である。It is a figure which shows the wire harness concerning the 1st implementation carrying of this invention. 図１に示されたワイヤハーネスが備える被覆電線を示す図である。It is a figure which shows the covered electric wire with which the wire harness shown by FIG. 1 is provided. 図２に示された被覆電線に加工される被覆電線中間材を示す断面図である。It is sectional drawing which shows the covered electric wire intermediate material processed into the covered electric wire shown by FIG. 図３に示された被覆電線中間材を加工する方法を説明する図である。It is a figure explaining the method of processing the covering electric wire intermediate material shown by FIG. 図３に示された被覆電線中間材を加工して形成された止水部の断面を示す図である。It is a figure which shows the cross section of the water stop part formed by processing the covering electric wire intermediate material shown by FIG. 図５に示された止水部の側面を示す図である。It is a figure which shows the side surface of the water stop part shown by FIG. 本発明の第二実施形態にかかる被覆電線中間材の断面を示す図である。It is a figure which shows the cross section of the covering electric wire intermediate material concerning 2nd embodiment of this invention. 図７に示された被覆電線中間材を加工して形成された止水部の断面を示す図である。It is a figure which shows the cross section of the water stop part formed by processing the covering electric wire intermediate material shown by FIG. 従来の被覆電線を示す断面図である。It is sectional drawing which shows the conventional covered electric wire.

（第一実施形態）
本発明の第一実施形態にかかるワイヤハーネス、被覆電線、被覆電線の製造方法、及び被覆電線中間材を図１〜図６を参照して説明する。 (First embodiment)
A wire harness, a covered electric wire, a method for manufacturing a covered electric wire, and a covered electric wire intermediate material according to a first embodiment of the present invention will be described with reference to FIGS.

本実施形態のワイヤハーネス１０は、車両等に設置された電子機器等に接続されるものであり、図１に示すように、被覆電線２０を含む複数の電線を備えている。   The wire harness 10 of this embodiment is connected to an electronic device or the like installed in a vehicle or the like, and includes a plurality of electric wires including a covered electric wire 20 as shown in FIG.

被覆電線２０は、図２に示すように、１つの止水部２１を有している。止水部２１は、被覆電線２０の端末よりも長手方向内側の位置において部分的に設けられており、ワイヤハーネス１０の設置環境下において、被覆電線２０の端部から侵入した水等が被覆電線２０内をつたうことを防止する。また、被覆電線２０は、後述する被覆電線中間材３０を加工して形成されている。   The covered electric wire 20 has one water stop part 21 as shown in FIG. The water stop portion 21 is partially provided at a position on the inner side in the longitudinal direction from the end of the covered electric wire 20, and water or the like entering from the end of the covered electric wire 20 is covered by the covered electric wire in the installation environment of the wire harness 10. 20 is prevented from touching. Further, the covered electric wire 20 is formed by processing a covered electric wire intermediate material 30 described later.

被覆電線中間材３０は、図３に示すように、複数の素線３１と、複数の素線３１を内側に収容した被覆部３２と、を有し、押出成形等により製造される。   As shown in FIG. 3, the covered electric wire intermediate member 30 includes a plurality of strands 31 and a covering portion 32 that accommodates the plurality of strands 31 inside, and is manufactured by extrusion molding or the like.

被覆部３２は、絶縁性の合成樹脂を用いてチューブ状に形成されている。被覆部３２は、被覆部３２の周囲から被覆部３２の長手方向について部分的に加熱圧縮されることにより溶融されてその一部が複数の素線３１の間隙に浸透するように構成されている。また、被覆部３２を構成する絶縁性の合成樹脂としては、例えば、エチレン酢酸ビニル共重合樹脂（Ｅｔｈｙｌｅｎｅ‐ｖｉｎｙｌ ａｃｅｔａｔｅ、以下、ＥＶＡと記載する）等を用いることができる。   The covering portion 32 is formed in a tube shape using an insulating synthetic resin. The covering portion 32 is configured to be melted by being partially heated and compressed from the periphery of the covering portion 32 in the longitudinal direction of the covering portion 32 so that a part thereof penetrates into the gaps between the plurality of strands 31. . Further, as the insulating synthetic resin constituting the covering portion 32, for example, ethylene-vinyl acetate copolymer resin (Ethylene-vinyl acetate, hereinafter referred to as EVA) can be used.

次に、被覆電線中間材３０を用いて被覆電線２０を製造する方法について図４を参照して説明する。   Next, a method of manufacturing the covered electric wire 20 using the covered electric wire intermediate material 30 will be described with reference to FIG.

被覆電線中間材３０を用いた被覆電線２０の製造方法は、加熱圧縮工程と、止水部形成工程と、小径部埋め工程と、からなる。   The manufacturing method of the covered electric wire 20 using the covered electric wire intermediate material 30 includes a heating and compressing step, a water stop portion forming step, and a small diameter portion filling step.

加熱圧縮工程は、被覆電線中間材３０を所望の長さに切り出した後、被覆部３２を周囲から被覆部３２の長手方向について部分的に加熱圧縮することにより溶融させて、溶融させた被覆部３２の一部を複数の素線３１の間隙Ｓに浸透させる工程である。図４に示すように、本実施形態の加熱圧縮工程は一対の加熱圧縮型４０を用いて行われる。加熱圧縮型４０は、被覆電線中間材３０に接する面４０ａの内形が被覆電線中間材３０の外形よりもやや小さい寸法に形成されている。これにより、溶融された被覆部３２の一部が中心に向けて圧縮されて（押し込まれて）、複数の素線３１の間隙Ｓに浸透する。すなわち、面４０ａの内形寸法は、溶融された被覆部３２の一部が、複数の素線３１の間隙Ｓ全体に浸透するように圧縮可能な大きさに形成されている。   In the heat compression step, the covered wire intermediate material 30 is cut out to a desired length, and then the covered portion 32 is melted by partially heat-compressing the surrounding portion in the longitudinal direction of the covered portion 32, and the covered portion is melted. In this step, a part of 32 is penetrated into the gaps S of the plurality of strands 31. As shown in FIG. 4, the heat compression process of this embodiment is performed using a pair of heat compression molds 40. The heating compression mold 40 is formed such that the inner shape of the surface 40 a in contact with the covered electric wire intermediate member 30 is slightly smaller than the outer shape of the covered electric wire intermediate member 30. As a result, a part of the melted coating portion 32 is compressed (pressed) toward the center and penetrates into the gaps S of the plurality of strands 31. That is, the inner dimension of the surface 40 a is formed to be a compressible size so that a part of the melted coating portion 32 penetrates the entire gap S between the plurality of strands 31.

止水部形成工程は、加熱を停止することにより溶融させた被覆部３２を固化させて、図５に示す止水部２１を形成する工程である。加熱圧縮工程及び止水部形成工程により、図６に示すように、加工した部分に小径部２１ａが形成される。   The water stopping part forming step is a step of solidifying the melted coating part 32 by stopping heating to form the water stopping part 21 shown in FIG. As shown in FIG. 6, a small diameter portion 21 a is formed in the processed portion by the heat compression step and the water stop portion forming step.

小径部埋め工程は、小径部２１ａを埋める工程である。例えば、小径部２１ａに、被覆部３２と同じ材料（例えばＥＶＡ）を用いて形成された帯状の部材（不図示）を巻いて周囲から加熱して溶融させることにより、小径部２１ａの外周面に前記帯状の部材が接着して、小径部２１ａを埋めることができる。   The small diameter portion filling step is a step of filling the small diameter portion 21a. For example, a belt-like member (not shown) formed using the same material (for example, EVA) as the covering portion 32 is wound around the small-diameter portion 21a, and heated and melted from the surroundings, so that the outer peripheral surface of the small-diameter portion 21a The band-shaped member can be bonded to fill the small diameter portion 21a.

本実施形態によれば、被覆電線中間材３０は、複数の素線３１と、複数の素線３１を内側に収容した絶縁性合成樹脂からなるチューブ形状の被覆部３２と、を有し、被覆部３２の周囲から被覆部３２の長手方向について部分的に加熱圧縮されることにより溶融されて、溶融された被覆部３２の一部が複数の素線３１の間隙Ｓに浸透するように被覆部３２が構成されている。このことから、被覆部３２の周囲から加熱圧縮して複数の素線３１の間隙Ｓに溶融された被覆部３２を浸透させることにより、加熱圧縮加工した部分においてその後に固化した被覆部３２によって止水することができ、所望の位置で簡易な加工により止水性を向上させることができる。   According to the present embodiment, the covered electric wire intermediate member 30 includes a plurality of strands 31 and a tube-shaped covering portion 32 made of an insulating synthetic resin in which the plurality of strands 31 are accommodated inside. The covering portion is melted by being partially heated and compressed from the periphery of the portion 32 in the longitudinal direction of the covering portion 32 so that a part of the melted covering portion 32 penetrates into the gaps S of the plurality of strands 31. 32 is configured. From this, by heating and compressing from the periphery of the coating portion 32 and allowing the molten coating portion 32 to penetrate into the gaps S of the plurality of strands 31, the coating portion 32 that has been solidified in the heat-compressed portion is stopped. Water stoppage can be achieved, and water stoppage can be improved by simple processing at a desired position.

また、被覆電線２０は、被覆部３２の周囲から被覆部３２の長手方向について部分的に加熱圧縮して、被覆部３２を溶融してその一部を複数の素線３１の間隙Ｓに浸透させたのち溶融させた被覆部３２を固化させた止水部２１が設けられていることから、所望の位置で簡易な加工により止水性を向上させることができる。   In addition, the covered electric wire 20 is partially heated and compressed from the periphery of the covering portion 32 in the longitudinal direction of the covering portion 32, and the covering portion 32 is melted so that a part thereof penetrates into the gaps S of the plurality of strands 31. Since the water stop part 21 which solidified the coating | coated part 32 fuse | melted after that is provided, water stop can be improved by simple process in a desired position.

また、被覆電線２０において、止水部２１が被覆電線２０の端末よりも長手方向内側の位置に設けられている。例えば、図９に示す従来の被覆電線７００において、被覆電線７００の長手方向全体に亘って気密部７０２が設けられている場合には、端末を加工するときに気密部７０２を構成するポリエチレン化合物を除去してから端子等を接続する必要がある。従って、このポリエチレン化合物が撚線導体７０１の端末に残存しないように除去する特殊な工程が必要となることから、加工作業性が悪いという問題があった。一方、被覆電線２０は、止水部２１が被覆電線２０の端末に設けられていないことから、複数の素線３１を被覆するチューブ形状の被覆部３２を皮むきにより簡易に除去することができ、端末加工性を良好にすることができる。   Further, in the covered electric wire 20, the water stop portion 21 is provided at a position on the inner side in the longitudinal direction from the end of the covered electric wire 20. For example, in the conventional covered electric wire 700 shown in FIG. 9, when the airtight portion 702 is provided over the entire longitudinal direction of the covered electric wire 700, a polyethylene compound that forms the airtight portion 702 when processing the terminal is used. It is necessary to connect the terminals after removal. Therefore, a special process for removing the polyethylene compound so that it does not remain at the end of the stranded wire conductor 701 is required, so that there is a problem that workability is poor. On the other hand, since the water-stop portion 21 is not provided at the end of the covered electric wire 20, the covered electric wire 20 can be easily removed by peeling the tube-shaped covering portion 32 covering the plurality of strands 31. Terminal processability can be improved.

また、加熱圧縮工程と、止水部形成工程を含むことから、所望の位置で止水性を向上させた被覆電線を簡易な加工により製造することができる。   Moreover, since the heat compression process and the water stop part formation process are included, the covered electric wire which improved the water stop at the desired position can be manufactured by simple processing.

また、ワイヤハーネス１０は、被覆電線２０を備えることから、ワイヤハーネス１０を構成する被覆電線２０の止水性を所望の位置において向上させることができる。また、簡易な加工により止水性を向上させることができることから、ワイヤハーネス１０製造時にこれまでのように専用の加工スペース／工程を設けるほかにライン上で止水加工することができる。   Moreover, since the wire harness 10 is provided with the covered electric wire 20, the water stopping property of the covered electric wire 20 which comprises the wire harness 10 can be improved in a desired position. In addition, since the water stoppage can be improved by simple processing, the waterstop processing can be performed on the line in addition to providing a dedicated processing space / process as before when the wire harness 10 is manufactured.

なお、本発明は、前記実施形態に限定されるものではなく、本発明の目的が達成できる他の構成等を含み、以下に示すような変形例等も本発明に含まれる。   In addition, this invention is not limited to the said embodiment, Including other structures etc. which can achieve the objective of this invention, the modification etc. which are shown below are also contained in this invention.

前記実施形態においては、止水部２１が被覆電線２０の長手方向において１つ（すなわち一部分に）形成されていたが、本発明の止水部は被覆電線の長手方向において複数（すなわち複数部分に）設けられていてもよい。これにより、より確実に止水することができ、被覆電線の止水信頼性をより向上させることができる。なお、本発明における「部分的」の記載は、一部分と複数部分との意味を含むものである。   In the said embodiment, although the water stop part 21 was formed in the longitudinal direction of the covered electric wire 20 (namely, one part), the water stop part of this invention has multiple (namely, several parts in the longitudinal direction of a covered electric wire). ) May be provided. Thereby, it can stop more reliably and can improve the still water reliability of a covered electric wire more. In addition, description of "partial" in this invention includes the meaning of a part and several parts.

また、前記実施形態においては、被覆電線２０を製造する方法において、小径部埋め工程が行われていたが、本発明の被覆電線製造方法においては、必ずしも小径部埋め工程は行われなくてもよい。また、小径部埋め工程が行われない場合、加熱圧縮工程及び止水部形成工程により、被覆電線中間材３０の間隙Ｓに溶融された被覆部３２の一部が充填されて形成された止水部が止水部２１以外の部分と比較して固くなり、被覆電線２０において止水部２１が形成された部分が曲がり難くなる。従って、ワイヤハーネス１０の配索経路に合わせて止水部２１を形成することにより、ワイヤハーネス１０の配索方向を規制しやすくすることができる。   Moreover, in the said embodiment, although the small diameter part filling process was performed in the method of manufacturing the covered electric wire 20, in the covered electric wire manufacturing method of this invention, the small diameter part filling process does not necessarily need to be performed. . Further, when the small diameter portion filling step is not performed, the water stop formed by filling a part of the melted covering portion 32 in the gap S of the covered wire intermediate material 30 by the heat compression step and the water stopping portion forming step. A part becomes hard compared with parts other than the water stop part 21, and the part in which the water stop part 21 was formed in the covered electric wire 20 becomes difficult to bend. Therefore, by forming the water stop portion 21 in accordance with the wiring path of the wire harness 10, the wiring direction of the wire harness 10 can be easily regulated.

（第二実施形態）
本発明の第二実施形態にかかるワイヤハーネス、被覆電線、被覆電線の製造方法、及び被覆電線中間材を図７、図８を参照して説明する。なお、第一実施形態に記載した構成と同じ構成には同じ符号を付して説明を省略する。 (Second embodiment)
A wire harness, a covered electric wire, a method for producing a covered electric wire, and a covered electric wire intermediate material according to a second embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the structure same as the structure described in 1st embodiment, and description is abbreviate | omitted.

本実施形態のワイヤハーネス（不図示）は、車両等に設置された電子機器等に接続されるものであり、第一実施形態の被覆電線２０とは異なる被覆電線２０Ａを含む複数の電線を備えている。   The wire harness (not shown) of this embodiment is connected to an electronic device or the like installed in a vehicle or the like, and includes a plurality of electric wires including a covered electric wire 20A different from the covered electric wire 20 of the first embodiment. ing.

被覆電線２０Ａは、複数の止水部２１Ａ（図８参照）を有している。止水部２１Ａは、被覆電線２０Ａの一部に設けられており、被覆電線２０の端部から侵入した水等が被覆電線２０内をつたうことを防止する。また、被覆電線２０Ａは、後述する被覆電線中間材３０Ａを加工して形成されている。   The covered electric wire 20A has a plurality of water stop portions 21A (see FIG. 8). The water stop portion 21 </ b> A is provided in a part of the covered electric wire 20 </ b> A, and prevents water or the like that has entered from the end of the covered electric wire 20 from passing through the covered electric wire 20. The covered electric wire 20A is formed by processing a covered electric wire intermediate material 30A described later.

被覆電線中間材３０Ａは、図７に示すように、複数の素線３１と、複数の素線３１を内側に収容した被覆部３２と、被覆部３２の外周面全体に重ねて設けられる外層被覆部３３Ａと、を有し、押出成形等により製造される。   As shown in FIG. 7, the covered electric wire intermediate member 30 </ b> A includes a plurality of strands 31, a covering portion 32 that accommodates the plurality of strands 31 inside, and an outer layer covering that is provided to overlap the entire outer peripheral surface of the covering portion 32. 33A, and is manufactured by extrusion molding or the like.

外層被覆部３３Ａは、被覆部３２よりも融点が高い材料を用いて形成されている。具体的には、被覆部３２に用いられるＥＶＡ等よりも融点が高い、ポリエチレン樹脂や、ポリ塩化ビニル樹脂等が用いられる。   The outer layer covering portion 33A is formed using a material having a melting point higher than that of the covering portion 32. Specifically, a polyethylene resin, a polyvinyl chloride resin, or the like having a higher melting point than EVA or the like used for the covering portion 32 is used.

次に、被覆電線中間材３０Ａを用いて被覆電線２０Ａを製造する方法について説明する。   Next, a method for manufacturing the covered electric wire 20A using the covered electric wire intermediate material 30A will be described.

被覆電線中間材３０Ａを用いた被覆電線２０Ａの製造方法は、加熱圧縮工程と、止水部形成工程と、小径部埋め工程と、からなる。   The manufacturing method of the covered electric wire 20A using the covered electric wire intermediate material 30A includes a heat compression step, a water stop portion forming step, and a small diameter portion filling step.

本実施形態の加熱圧縮工程は、被覆電線中間材３０Ａを所望の長さに切り出した後、外層被覆部３３Ａの周囲から加熱圧縮することにより被覆部３２を溶融させて、溶融させた被覆部３２の一部を複数の素線３１の間隙Ｓに浸透させる工程である。本実施形態の加熱圧縮工程は、被覆部３２は溶融するが、外層被覆部３３Ａは溶融しない温度に加熱して行われる。なお、止水部形成工程及び小径部埋め工程は第一実施形態と同様である。   In the heat compression process of the present embodiment, the covered wire intermediate material 30A is cut out to a desired length, and then the covered portion 32 is melted by heating and compressing from the periphery of the outer layer covered portion 33A. Is a step of causing a part of the wire to penetrate into the gaps S of the plurality of strands 31. The heat compression process of the present embodiment is performed by heating to a temperature at which the coating portion 32 melts but the outer layer coating portion 33A does not melt. In addition, the water stop part formation process and the small diameter part filling process are the same as in the first embodiment.

本実施形態によれば、被覆電線中間材３０Ａは、被覆部３２の外周面全体に重ねて設けられ、被覆部３２よりも融点が高い材料からなる外層被覆部３３Ａをさらに有している。このことから、外層被覆部３３Ａを設けることにより、被覆電線２０Ａの配索環境に合わせて適切な材料を用いて被覆部３２の外周面を被覆することができ、より経時劣化し難い被覆電線２０Ａの被覆電線中間材３０Ａを提供することができる。   According to the present embodiment, the covered electric wire intermediate member 30 </ b> A further includes the outer layer covering portion 33 </ b> A made of a material having a higher melting point than that of the covering portion 32. From this, by providing the outer layer covering portion 33A, the outer peripheral surface of the covering portion 32 can be covered with an appropriate material in accordance with the routing environment of the covered wire 20A, and the covered wire 20A that is less likely to deteriorate with time. The covered electric wire intermediate material 30A can be provided.

その他、本発明を実施するための最良の構成、方法などは、以上の記載で開示されているが、本発明は、これに限定されるものではない。すなわち、本発明は、主に特定の実施形態に関して特に図示され、且つ、説明されているが、本発明の技術的思想および目的の範囲から逸脱することなく、以上述べた実施形態に対し、形状、材質、数量、その他の詳細な構成において、当業者が様々な変形を加えることができるものである。   In addition, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, the invention has been illustrated and described primarily with respect to particular embodiments, but may be configured for the above-described embodiments without departing from the scope and spirit of the invention. Various modifications can be made by those skilled in the art in terms of materials, quantity, and other detailed configurations.

従って、上記に開示した形状、材質などを限定した記載は、本発明の理解を容易にするために例示的に記載したものであり、本発明を限定するものではないから、それらの形状、材質などの限定の一部、もしくは全部の限定を外した部材の名称での記載は、本発明に含まれるものである。   Therefore, the description limiting the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such is included in this invention.

１０ ワイヤハーネス
２０、２０Ａ 被覆電線
３０、３０Ａ 被覆電線中間材
２１、２１Ａ 止水部
３１ 素線
３２ 被覆部
３３Ａ 外層被覆部 DESCRIPTION OF SYMBOLS 10 Wire harness 20, 20A Covered electric wire 30, 30A Covered electric wire intermediate material 21, 21A Water stop part 31 Wire 32 Cover part 33A Outer layer cover part

Claims (7)

加工されることにより被覆電線となる被覆電線中間材であって、
複数の素線と、
前記複数の素線を内側に収容した絶縁性合成樹脂からなるチューブ形状の被覆部と、を有し、
前記被覆部が、該被覆部の周囲から前記被覆部の長手方向について部分的に加熱圧縮されることにより溶融されて、溶融された前記被覆部の一部が前記複数の素線の間隙に浸透するように構成されている
ことを特徴とする被覆電線中間材。 A coated wire intermediate material that becomes a coated wire by being processed,
Multiple strands,
A tube-shaped covering portion made of an insulating synthetic resin containing the plurality of strands inside, and
The covering portion is melted by being partially heated and compressed in the longitudinal direction of the covering portion from the periphery of the covering portion, and a part of the melted covering portion penetrates into the gaps of the plurality of strands. A covered electric wire intermediate material characterized by comprising: 前記被覆部の外周面全体に重ねて設けられ、前記被覆部よりも融点が高い材料からなる外層被覆部をさらに有していることを特徴とする請求項１に記載の被覆電線中間材。   The covered electric wire intermediate material according to claim 1, further comprising an outer covering portion made of a material having a melting point higher than that of the covering portion, which is provided so as to overlap the entire outer peripheral surface of the covering portion. 請求項１又は２に記載の被覆電線中間材を加工してなる被覆電線であって、
前記被覆部の周囲から前記被覆部の長手方向について部分的に加熱圧縮して、前記被覆部を溶融してその一部を前記複数の素線の間隙に浸透させたのち溶融させた前記被覆部を固化させた止水部を設けたことを特徴とする被覆電線。 A coated electric wire obtained by processing the coated electric wire intermediate material according to claim 1 or 2,
The covering portion that is partially heated and compressed from the periphery of the covering portion in the longitudinal direction of the covering portion to melt the covering portion and infiltrate a part thereof into the gaps between the plurality of strands. A covered electric wire characterized by providing a water stop portion that has solidified the water. 前記止水部が端末よりも前記長手方向内側の位置に設けられていることを特徴とする請求項３に記載の被覆電線。   The covered electric wire according to claim 3, wherein the water stop portion is provided at a position on the inner side in the longitudinal direction from the terminal. 前記止水部が複数設けられていることを特徴とする請求項３又は４に記載の被覆電線。   The covered electric wire according to claim 3 or 4, wherein a plurality of the water stop portions are provided. 請求項３〜５のいずれか１項に記載の被覆電線を備えることを特徴とするワイヤハーネス。   A wire harness comprising the covered electric wire according to any one of claims 3 to 5. 複数の素線と、前記複数の素線を内側に収容した絶縁性合成樹脂からなるチューブ形状の被覆部と、を有する被覆電線中間材を加工して被覆電線を製造する被覆電線の製造方法であって、
前記被覆部を周囲から前記被覆部の長手方向について部分的に加熱圧縮することにより溶融させてその一部を前記複数の素線の間隙に浸透させる加熱圧縮工程と、
溶融させた前記被覆部を固化させて、前記止水部を形成する止水部形成工程と、を含む
ことを特徴とする被覆電線の製造方法。 A method of manufacturing a covered electric wire by manufacturing a covered electric wire by processing a coated electric wire intermediate material having a plurality of strands and a tube-shaped covering portion made of an insulating synthetic resin containing the plurality of strands inside. There,
A heating and compressing step in which the covering portion is melted by partially heating and compressing the covering portion in the longitudinal direction of the covering portion, and a part thereof penetrates into the gaps of the plurality of strands;
A water stopping part forming step of solidifying the melted covering part to form the water stopping part. A method for manufacturing a covered electric wire, comprising:
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