JP2012182924A - Hot melt block for inter-wire water cut-off and terminal water cut-off method for multicore cable using hot melt block, and terminal water cut-off structure - Google Patents

Hot melt block for inter-wire water cut-off and terminal water cut-off method for multicore cable using hot melt block, and terminal water cut-off structure Download PDF

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JP2012182924A
JP2012182924A JP2011044751A JP2011044751A JP2012182924A JP 2012182924 A JP2012182924 A JP 2012182924A JP 2011044751 A JP2011044751 A JP 2011044751A JP 2011044751 A JP2011044751 A JP 2011044751A JP 2012182924 A JP2012182924 A JP 2012182924A
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hot melt
melt block
electric wires
wires
water
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Hiroshi Hoshino
浩志 星野
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Sumitomo Wiring Systems Ltd
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Sumitomo Wiring Systems Ltd
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Priority to PCT/JP2011/074640 priority patent/WO2012117608A1/en
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    • 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
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H02G3/088—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings or inlets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
    • H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
    • 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
    • H02G15/003—Filling materials, e.g. solid or fluid insulation
    • 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
    • H02G15/013—Sealing means for cable inlets
    • 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
    • H02G15/046—Cable-end sealings with end caps, e.g. sleeve closed at one end with bores or protruding portions allowing passage of cable conductors
    • 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

Abstract

PROBLEM TO BE SOLVED: To make it possible to easily and certainly perform water cut-off at a terminal part of a multicore cable.SOLUTION: A terminal water cut-off method comprises the steps of: drawing a plurality of electric wires 3 from a barking end 2a at a tip of a multicore cable 1; arranging partition walls 11 of a hot melt block 10 to among the plurality of drawn electric wires 3 by imposing the hot melt block 10 on the electric wires 3; next, covering a region from an outer periphery of the electric wires 3 on which the hot melt block 10 is imposed to an outer periphery of a sheath 2 at the tip of the multicore cable 1 with a water-proof heat-shrinkable tube 12 whose inner peripheral surface is coated with an adhesive 12a; and, after that, performing heat treatment to perform water cut-off among the electric wires 3 by filling up among the electric wires 3 with melted hot melt block 10 and to perform water cut-off on the outer periphery side of the electric wires 3 and the outer periphery side of the sheath 2 of the multicore cable 1 by making the water-proof heat-shrinkable tube 12 shrink thermally.

Description

本発明は線間止水用のホットメルトブロックおよび該ホットメルトブロックを用いた多芯ケーブルの端末止水方法ならびに端末止水構造に関し、詳しくは、複数本の電線をシースで被覆した多芯ケーブルの端末部分の止水を容易かつ確実に行うものである。   BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-melt block for water-stop between lines, a multi-core cable terminal water-stop method using the hot-melt block, and a terminal water-stop structure, and more specifically, a multi-core cable in which a plurality of wires are covered with a sheath The terminal part of the water is easily and reliably stopped.

多芯ケーブルは、複数本の絶縁被覆電線（以下、電線という）を絶縁樹脂材料からなるシースで被覆したものであり、多芯ケーブルの皮剥ぎ端から前記複数本の電線を外部に引き出し、各電線端末をさらに皮剥ぎして端子金具を圧着することにより、コネクタを介して相手側機器と接続することができる。また、多芯ケーブルの端末から引き出した電線が水濡れするような場合には、前記電線端末の端子を挿入するコネクタを止水コネクタとして電線を伝って相手側機器内に水が浸入するのを防止すると共に、前記電線が引き出される多芯ケーブルの端末にも止水構造を設けて多芯ケーブル内部に水が浸入しないようにすることが重要である。   A multi-core cable is obtained by coating a plurality of insulation-coated wires (hereinafter referred to as electric wires) with a sheath made of an insulating resin material, and pulling out the plurality of wires from the peeled end of the multi-core cable to the outside. By further peeling the wire terminal and crimping the terminal fitting, it is possible to connect to the counterpart device via the connector. In addition, when the wire drawn from the end of the multi-core cable gets wet, the connector that inserts the terminal of the wire end is used as a water stop connector to prevent water from entering the counterpart device. It is important to prevent water from entering the multicore cable by providing a water stop structure at the end of the multicore cable from which the electric wire is drawn out.

従来、多芯ケーブルの端末に止水構造を設けるために、特開２００３−１７４７１６号公報（特許文献１）には、複数の電線１０２が引き出される多芯ケーブル１００のシース１０１の先端に筒体１０３を取り付け、該筒体１０３内にシリコーン系の接着剤等のシール材１０４を注入、充填して止水することが提案されている（図９参照）。   Conventionally, in order to provide a water stop structure at the end of a multicore cable, Japanese Patent Application Laid-Open No. 2003-174716 (Patent Document 1) discloses a cylindrical body at the distal end of a sheath 101 of a multicore cable 100 from which a plurality of electric wires 102 are drawn. It has been proposed to attach 103 and inject and fill a sealing material 104 such as a silicone-based adhesive into the cylinder 103 to stop water (see FIG. 9).

また、特開２００８−６７５４５号公報（特許文献２）には、多芯ケーブル（シールド線）１１０の皮剥ぎ端から引き出されるコア電線あるいは／およびドレン線１１２にホットメルトチューブ１１３を通し、さらに、該ホットメルトチューブ１１３の外周および多芯ケーブル１１０先端のシース１１１の外周を被覆するように、止水剤１１４を塗布した防水熱収縮チューブ１１５を通して加熱処理を行うことで、ホットメルトチューブ１１３および止水剤１１４を溶融させて電線１１２間に充填させると共に、防水熱収縮チューブ１１５を熱収縮させて多芯ケーブル１１０の端末を止水する方法を提案している（図１０参照）。   In addition, JP 2008-67545 A (Patent Document 2) includes passing a hot melt tube 113 through a core wire or / and a drain wire 112 drawn from the peeled end of a multi-core cable (shield wire) 110, Heat treatment is performed through the waterproof heat-shrinkable tube 115 coated with a water-stopping agent 114 so as to cover the outer periphery of the hot-melt tube 113 and the outer periphery of the sheath 111 at the tip of the multicore cable 110. A method has been proposed in which the liquid agent 114 is melted and filled between the electric wires 112 and the waterproof heat-shrinkable tube 115 is thermally shrunk to stop the end of the multicore cable 110 (see FIG. 10).

特開２００３−１７４７１６号公報JP 2003-174716 A 特開２００８−６７５４５号公報JP 2008-67545 A

しかし、特許文献１の止水構造を得るには、シール材１０４を筒体１０３内に充填する装置が必要となるうえ、シール材１０４の充填や硬化に時間を要し、作業性が良くないという問題がある。   However, in order to obtain the water stop structure of Patent Document 1, a device for filling the sealing material 104 into the cylindrical body 103 is required, and it takes time to fill and cure the sealing material 104, and workability is not good. There is a problem.

また、特許文献２の止水方法では、複数本の電線１１２にホットメルトチューブ１１３を１本ずつ通す作業が時間を要する一方、ホットメルトチューブ１１３を一部の電線１１２にだけ通す構成とすると、溶融したホットメルトが複数の電線１１２間に十分浸透せず満足した止水性能が得られない場合がある。   Further, in the water stopping method of Patent Document 2, while it takes time to pass the hot melt tubes 113 through the plurality of electric wires 112 one by one, the hot melt tube 113 is passed through only some of the electric wires 112. In some cases, the melted hot melt does not sufficiently permeate between the plurality of electric wires 112 and satisfactory water stop performance cannot be obtained.

本発明は、多芯ケーブルの端末部分の止水を容易かつ確実に行えることを課題としている。   This invention makes it the subject to be able to perform the water stop of the terminal part of a multicore cable easily and reliably.

前記課題を解決するため、本発明は、複数本の電線間に配置されて該電線を１本ずつ仕切る仕切壁を長さ方向に備え、
該仕切壁を前記電線間に配置した状態で加熱溶融されることにより、前記電線間に充填されることを特徴とする線間止水用のホットメルトブロックを提供している。
本発明におけるホットメルトブロックとは、熱溶着性接着剤で形成された固形ブロックであり、常温では前記固形ブロック状である一方、加熱されると溶融してゲル状に変化するものである。 In order to solve the above-mentioned problem, the present invention is provided with a partition wall in the length direction that is arranged between a plurality of electric wires and partitions the electric wires one by one,
A hot melt block for line-stopping water is provided, which is filled between the electric wires by being heated and melted in a state where the partition wall is arranged between the electric wires.
The hot melt block in the present invention is a solid block formed of a heat-weldable adhesive, which is in the form of the solid block at room temperature, and melts and changes into a gel when heated.

また、本発明は、多芯ケーブルの先端の皮剥ぎ端から複数本の電線を引き出し、
該引き出した複数本の電線に前記ホットメルトブロックを該ホットメルトブロックの仕切壁を前記電線間に配置した状態で組み付け、
ついで、前記ホットメルトブロックを組み付けた前記電線の外周から前記多芯ケーブル先端のシースの外周にかけての領域に、内周面に接着剤が塗布された防水熱収縮チューブを被せ、
その後、加熱処理をして、前記ホットメルトブロックを溶融させ前記電線間に充填させて該電線間を止水すると共に、前記防水熱収縮チューブを熱収縮させて前記電線の外周側および前記多芯ケーブルのシース外周側を止水することを特徴とするホットメルトブロックを用いた多芯ケーブルの端末止水方法を提供している。 In addition, the present invention draws a plurality of wires from the peeled end of the end of the multicore cable,
Assembling the hot melt block in a state where the partition wall of the hot melt block is disposed between the electric wires to the plurality of drawn electric wires,
Next, a region from the outer periphery of the electric wire assembled with the hot melt block to the outer periphery of the sheath at the tip of the multi-core cable is covered with a waterproof heat-shrinkable tube having an inner surface coated with an adhesive,
Thereafter, heat treatment is performed to melt the hot melt block and fill between the wires to stop water between the wires, and to thermally shrink the waterproof heat-shrinkable tube so that the outer peripheral side of the wires and the multicore There is provided a terminal water stopping method for a multi-core cable using a hot melt block, characterized in that the outer peripheral side of the sheath of the cable is stopped.

さらに、本発明は、前記端末止水方法で得られる多芯ケーブルの端末止水構造を提供している。   Furthermore, this invention provides the terminal water stop structure of the multi-core cable obtained by the said terminal water stop method.

前記のように、本発明では多芯ケーブル先端の皮剥ぎ端から引き出す複数本の電線の線間止水に、仕切壁を備えたホットメルトブロックを用いている。該ホットメルトブロックには線間止水する電線を長さ方向に１本ずつ仕切る仕切壁を設けており、多芯ケーブルの皮剥ぎ端から引き出した電線間に前記仕切壁が位置するようにホットメルトブロックを組み付けるだけで、加熱により溶融したホットメルトを前記電線間に隙間なく浸透、充填させて電線間の止水性能を高めることができる。即ち、前記構成によれば、従来のように多芯ケーブルの端部に筒体を取り付けて該筒体内に液状のシール材を注入したり、皮剥ぎ端から引き出した複数本の電線にホットメルトチューブを１本ずつ通したりする必要がないため、止水作業性を高めることができる。
なお、前記ホットメルトブロックは、前記仕切壁の長さ方向の一端が前記多芯ケーブルの皮剥ぎ端付近に位置するように組み付けられることが好ましい。 As described above, in the present invention, the hot melt block provided with the partition wall is used for the line water stop of the plurality of wires drawn from the peeled end of the multi-core cable tip. The hot melt block is provided with a partition wall that divides the electric wire that stops the line one by one in the length direction, so that the partition wall is positioned between the electric wires drawn from the peeled end of the multicore cable. By simply assembling the melt block, the hot melt melted by heating can be permeated and filled between the electric wires without any gaps, thereby improving the water stop performance between the electric wires. That is, according to the above-described configuration, a cylindrical body is attached to the end of a multi-core cable and a liquid sealing material is injected into the cylindrical body, or hot melt is applied to a plurality of electric wires drawn from the peeled end. Since there is no need to pass the tubes one by one, the water stop workability can be improved.
In addition, it is preferable that the said hot-melt block is assembled | attached so that the end of the length direction of the said partition wall may be located in the peeling end vicinity of the said multi-core cable.

また、ホットメルトブロックを組み付けた前記電線の外周から前記多芯ケーブル先端側のシースの外周にかけての領域に、内周面に接着剤が塗布された防水熱収縮チューブを被せることで、その後の加熱処理により、溶融したホットメルトの電線間への充填と防水熱収縮チューブの熱収縮とを同時に行うことができる。即ち、皮剥ぎ端から引き出される電線間の止水と、該電線外周側およびシース外周側の止水を同時に行うことができるため、多芯ケーブル端末の止水性能と止水作業性を共に向上させることができる。   In addition, by covering the area from the outer periphery of the electric wire to which the hot melt block is assembled to the outer periphery of the sheath on the distal end side of the multi-core cable, a waterproof heat-shrinkable tube having an inner peripheral surface coated with an adhesive is covered, By the treatment, filling of the molten hot melt between the electric wires and heat shrinkage of the waterproof heat shrinkable tube can be performed simultaneously. That is, the water stop between the wires drawn from the peeled end and the water stop on the outer periphery of the wire and the outer periphery of the sheath can be performed at the same time, thus improving both the water stop performance and the water stop workability of the multicore cable terminal. Can be made.

前記ホットメルトブロックには、線間止水しようとする電線の本数に相当する枚数の前記仕切壁を断面放射状に設け、隣接する２枚の前記仕切壁に挟まれた空間に前記各電線を挿通させる構成としていることが好ましい。   The hot melt block is provided with a number of partition walls corresponding to the number of wires to be line-stopped in a radial shape, and the wires are inserted into a space between two adjacent partition walls. It is preferable to adopt a configuration in which

前記のように、ホットメルトブロックの仕切壁を断面放射状に設けることで、従来、止水剤を充填させにくかった電線束の中心軸付近に、放射状に突出させる各仕切壁の中心を配置して該領域にホットメルトを常に存在させることが可能となり、電線間の止水性能をより高めることができる。   As described above, by providing the hot melt block partition walls radially, the center of each partition wall protruding radially is arranged near the central axis of the bundle of wires that has been difficult to fill with a water-stopping agent in the past. The hot melt can always be present in the region, and the water stopping performance between the electric wires can be further improved.

例えば、皮剥ぎ端から引き出される電線本数が４本の場合には、中心角９０度間隔で４枚の仕切壁を断面放射状に突出させることが好ましいが、挿通する電線の太さに応じて隣接する２枚の仕切壁間の中心角を変えることもできる。同様に、電線本数が３本の場合には中心角１２０度間隔で３枚の仕切壁を断面放射状に突出させることができ、電線本数が２本の場合には中心角１８０度間隔で２枚の仕切壁を断面放射状に突出させる、即ち断面Ｉ字状の仕切壁とすることができる。   For example, when the number of wires pulled out from the peeled end is four, it is preferable to project four partition walls radially at a central angle of 90 degrees, but adjacent to the thickness of the wire to be inserted. It is also possible to change the central angle between the two partition walls. Similarly, when the number of electric wires is three, three partition walls can be projected radially at intervals of central angles of 120 °, and when the number of electric wires is two, two partitions are provided at intervals of 180 ° central angles. The partition wall can be made to protrude radially in section, that is, a partition wall having an I-shaped section.

また、前記ホットメルトブロックは、前記断面放射状に設けた各仕切壁の外端面に外接する外筒部を備え、隣接する２枚の前記仕切壁と前記外筒部の周壁とで囲まれた空間に前記各電線を挿通させるようにしてもよい。   The hot melt block includes an outer cylinder part circumscribing an outer end surface of each partition wall provided radially in the cross section, and is a space surrounded by two adjacent partition walls and a peripheral wall of the outer cylinder part You may make it let each said electric wire penetrate.

前記のように、断面放射状に設けた各仕切壁の外端面に外接する外筒部を設け、隣接する２枚の前記仕切壁と前記外筒部の周壁とで囲まれた空間に前記各電線を挿通させることで、電線を１本ずつ確実に分離して挿通することができ、２本まとめて同一空間に挿通されるなどの電線挿通ミスを防ぐことができる。また、ホットメルトブロックに前記外筒部を設けることで、加熱によって各電線の周囲により多くのホットメルトを充填させることができ、止水性能をさらに高めることができる。   As described above, an outer cylinder part circumscribing the outer end surface of each partition wall provided radially in cross section is provided, and each electric wire is formed in a space surrounded by two adjacent partition walls and the peripheral wall of the outer cylinder part. By inserting a wire, it is possible to reliably separate and insert the wires one by one, and to prevent a mistake in inserting the wires such as inserting two wires together in the same space. Further, by providing the outer cylinder portion in the hot melt block, it is possible to fill more hot melt around each electric wire by heating, and it is possible to further improve the water stop performance.

前記ホットメルトブロックは、同一断面形状として押出成形で形成できるため、比較的低コストで容易に製造することができる。   Since the hot melt block can be formed by extrusion molding with the same cross-sectional shape, it can be easily manufactured at a relatively low cost.

また、熱収縮し、前記多芯ケーブルの皮剥ぎ端から引き出した複数本の電線の外周に固着した前記防水熱収縮チューブの端部には、粘着テープを巻き付けていることが好ましい。これにより、防水熱収縮チューブの位置ずれを防止し、該防水熱収縮チューブによる止水をより確実にすることができる。   Moreover, it is preferable that an adhesive tape is wound around the end of the waterproof heat-shrinkable tube that is heat-shrinked and fixed to the outer periphery of a plurality of electric wires drawn from the peeled end of the multicore cable. Thereby, the position shift of a waterproof heat contraction tube can be prevented, and the water stop by this waterproof heat contraction tube can be made more reliable.

本発明によれば、多芯ケーブル先端の皮剥ぎ端から引き出す複数本の電線の線間止水に、該電線を1本ずつ仕切る仕切壁を長さ方向に備えたホットメルトブロックを用いている。即ち、多芯ケーブルの皮剥ぎ端から引き出した電線間に前記仕切壁が位置するようにホットメルトブロックを組み付けるだけで、加熱により溶融したホットメルトを前記電線間に隙間なく浸透、充填させることができ、電線間の止水性能を高めることができる。   According to the present invention, a hot melt block provided with a partition wall in the length direction for partitioning the wires one by one is used for the inter-line water stop of a plurality of wires drawn from the peeled end of the multicore cable tip. . That is, the hot melt melted by heating can be permeated and filled between the electric wires without any gaps simply by assembling the hot melt block so that the partition wall is located between the electric wires drawn from the peeled end of the multicore cable. It is possible to improve the water stopping performance between the electric wires.

さらに、前記ホットメルトブロックが組み付けられた前記電線の外周から前記多芯ケーブル先端側のシースの外周にかけての領域に、内周面に接着剤が塗布された防水熱収縮チューブを被せることで、その後の加熱処理により、溶融したホットメルトの電線間への充填と防水熱収縮チューブの熱収縮とを同時に行うことができる。即ち、皮剥ぎ端から引き出される電線間の止水と、該電線外周側およびシース外周側の止水を同時に行うことができるため、多芯ケーブル端末の止水性能と止水作業性を共に向上させることができる。   Furthermore, by covering a region from the outer periphery of the electric wire assembled with the hot melt block to the outer periphery of the sheath on the distal end side of the multi-core cable, a waterproof heat-shrinkable tube having an inner peripheral surface coated with an adhesive is covered. By this heat treatment, filling of the molten hot melt between the electric wires and heat shrinkage of the waterproof heat shrinkable tube can be performed simultaneously. That is, the water stop between the wires drawn from the peeled end and the water stop on the outer periphery of the wire and the outer periphery of the sheath can be performed at the same time, thus improving both the water stop performance and the water stop workability of the multicore cable terminal. Can be made.

本発明の第１実施形態で用いるホットメルトブロックの概略斜視図である。It is a schematic perspective view of the hot-melt block used in 1st Embodiment of this invention. 多芯ケーブルの構成を示す概略説明図である。It is a schematic explanatory drawing which shows the structure of a multicore cable. 多芯ケーブル先端の皮剥ぎ端から引き出した複数本の電線にホットメルトブロックを組み付けた状態を示す概略斜視図である。It is a schematic perspective view which shows the state which assembled | attached the hot-melt block to the several electric wire pulled out from the peeling end of the multi-core cable front-end | tip. ホットメルトブロックを組み付けた電線の外周面から多芯ケーブル先端側のシース外周面にかけての領域に防水熱収縮チューブを被せた状態を示す概略斜視図である。It is a schematic perspective view which shows the state which covered the area | region from the outer peripheral surface of the electric wire which assembled | attached the hot-melt block to the sheath outer peripheral surface at the front end side of a multicore cable. （Ａ）は図４の状態で加熱処理を行った後の状態、（Ｂ）は熱収縮した防水熱収縮チューブの一端をテープ巻きした状態をそれぞれ示す概略斜視図である。(A) is a schematic perspective view showing a state after heat treatment in the state of FIG. 4, and (B) is a schematic perspective view showing a state where one end of a heat-shrinkable waterproof heat-shrinkable tube is wound with tape. 本発明の第２実施形態で用いるホットメルトブロックの概略斜視図である。It is a schematic perspective view of the hot-melt block used in 2nd Embodiment of this invention. 多芯ケーブル先端の皮剥ぎ端から引き出した複数本の電線にホットメルトブロックを組み付けた状態を示す概略断面図である。It is a schematic sectional drawing which shows the state which assembled | attached the hot melt block to the several electric wire pulled out from the peeling end of the multi-core cable front-end | tip. （Ａ）、（Ｂ）、（Ｃ）はホットメルトブロックの別の例を示す概略断面図である。(A), (B), (C) is a schematic sectional drawing which shows another example of a hot-melt block. 従来例を示す図である。It is a figure which shows a prior art example. 従来例を示す図である。It is a figure which shows a prior art example.

以下、本発明の実施形態を図面を参照して説明する。
図１乃至図５は第１実施形態を示している。図２に示す多芯ケーブル１は、複数本（本実施形態では４本）の絶縁被覆電線３（以下、電線３という）を絶縁樹脂材料からなるシース２で被覆したものであり、多芯ケーブル１の先端の所要長さのシース２を切断剥離して皮剥ぎ端２ａから４本の電線３を引き出し、図示していないが、各電線３の端末をさらに皮剥ぎしてコネクタに挿入される端子を圧着接続している。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 5 show a first embodiment. A multicore cable 1 shown in FIG. 2 is a multicore cable in which a plurality (four in this embodiment) of insulation-coated electric wires 3 (hereinafter referred to as electric wires 3) are covered with a sheath 2 made of an insulating resin material. The sheath 2 having a required length at the tip of 1 is cut and peeled to pull out the four wires 3 from the peeled end 2a, and although not shown, the end of each wire 3 is further peeled and inserted into the connector. The terminal is crimped.

本実施形態の多芯ケーブル１には、４本の電線３が引き出される端末部分に、図１に示す線間止水用のホットメルトブロック１０を用いた止水構造を設けている。
線間止水用のホットメルトブロック１０は熱溶着性接着剤で形成された一体型の固形ブロックで、常温では前記固形ブロック状である一方、加熱されると溶融してゲル状に変化する。ホットメルトブロック１０は、図１に示すように、断面放射状（本実施形態では中心角９０度間隔で分岐した断面十字状）に形成した４枚の仕切壁１１からなり、隣接する２枚の仕切壁１１で挟まれた空間Ｓ１に各電線を挿通することで、４本すべての電線３間に仕切壁１１が配置された状態となる。 The multi-core cable 1 of the present embodiment is provided with a water stop structure using a hot-melt block 10 for line stop water shown in FIG. 1 at a terminal portion from which four wires 3 are drawn.
The hot-melt block 10 for water-stopping between lines is an integrated solid block formed of a heat-weldable adhesive, which is in the form of the solid block at room temperature, and melts and changes into a gel when heated. As shown in FIG. 1, the hot melt block 10 is composed of four partition walls 11 formed in a radial cross section (in the present embodiment, a cross-shaped cross section branched at an interval of 90 degrees in the central angle). By inserting each electric wire into the space S <b> 1 sandwiched between the walls 11, the partition wall 11 is arranged between all four electric wires 3.

以下、前記ホットメルトブロック１０を用いた多芯ケーブル１の端末止水方法について説明する。
まず、図２のように多芯ケーブル１先端の皮剥ぎ端２ａから引き出された４本の電線にホットメルトブロック１０を組み付ける。ホットメルトブロック１０の組み付けは、図３に示すように、隣接する２枚の仕切壁１１で挟まれる空間Ｓ１に、引き出された各電線３を挿通させると共に、仕切壁１１の長さ方向の一端１１ａを皮剥ぎ端２ａ付近に位置させるだけで完了する。これにより、すべての電線３間に仕切壁１１が配置された状態となる。 Hereinafter, the terminal water stop method of the multicore cable 1 using the hot melt block 10 will be described.
First, as shown in FIG. 2, the hot melt block 10 is assembled to the four electric wires drawn from the peeled end 2 a at the tip of the multicore cable 1. As shown in FIG. 3, the hot melt block 10 is assembled by inserting each drawn-out electric wire 3 into a space S <b> 1 sandwiched between two adjacent partition walls 11 and one end of the partition wall 11 in the length direction. Simply place 11a near the peeled edge 2a. Thereby, it will be in the state by which the partition wall 11 was arrange | positioned between all the electric wires 3. FIG.

ついで、図４に示すように、ホットメルトブロック１０を組み付けた電線３の外周から多芯ケーブル１先端のシース２の外周にかけての領域に、内周面に接着剤１２ａを塗布した防水熱収縮チューブ１２を被せ、その後、加熱処理を行う。   Next, as shown in FIG. 4, a waterproof heat-shrinkable tube in which an adhesive 12a is applied to the inner peripheral surface in a region from the outer periphery of the electric wire 3 assembled with the hot melt block 10 to the outer periphery of the sheath 2 at the tip of the multicore cable 1. 12 and then heat treatment is performed.

前記加熱処理により、溶融したホットメルトブロック１０（ホットメルト１０Ｍ）が電線３間に隙間なく浸透、充填、固化して電線３間を止水すると共に、前記接着剤１２ａ付きの防水熱収縮チューブ１２が熱収縮することで電線３の外周側および多芯ケーブル１のシース２外周側を止水する。
なお、図５（Ｂ）に示すように、熱収縮し、多芯ケーブル１の皮剥ぎ端２ａから引き出された電線３の外周に固着している防水熱収縮チューブ１２の端部に粘着テープＴを巻き付けている。 As a result of the heat treatment, the melted hot melt block 10 (hot melt 10M) penetrates, fills and solidifies between the electric wires 3 without any gaps to stop water between the electric wires 3, and the waterproof heat-shrinkable tube 12 with the adhesive 12a. Heat-shrinks to stop the outer peripheral side of the electric wire 3 and the outer peripheral side of the sheath 2 of the multi-core cable 1.
As shown in FIG. 5B, the adhesive tape T is attached to the end of the waterproof heat-shrinkable tube 12 that is heat-shrinked and is fixed to the outer periphery of the electric wire 3 drawn from the peeled end 2a of the multicore cable 1. Is wrapped around.

前記のように、本実施形態では、多芯ケーブル１先端の皮剥ぎ端２ａから引き出した４本の電線３間の止水に、該電線３を1本ずつ仕切る断面十字状の仕切壁１１を長さ方向に備えたホットメルトブロック１０を用いている。即ち、多芯ケーブル１の皮剥ぎ端２ａから引き出した電線３間に断面十字状の仕切壁１１を挟み込むようにホットメルトブロック１０を組み付けるだけで、加熱により溶融したホットメルト１０Ｍを電線３間の隅々まで浸透、充填させることができ、電線３間の止水性能を高めることができる。特に、ホットメルトブロック１０の仕切壁１１を断面十字状に設けることで、従来、止水剤を充填させにくかった電線束の中心軸付近に、断面十字状に突出させる各仕切壁１１の中心１１Ｃを配置して該領域にホットメルトを常に存在させることが可能となり、電線３間の止水性能をより高めることができる。   As described above, in this embodiment, a cross-shaped partition wall 11 having a cross-sectional shape for partitioning the wires 3 one by one is used to stop water between the four wires 3 drawn from the peeled end 2a at the tip of the multi-core cable 1. A hot melt block 10 provided in the length direction is used. That is, the hot melt 10M melted by heating can be transferred between the electric wires 3 only by assembling the hot melt block 10 so as to sandwich the cross-shaped partition wall 11 between the electric wires 3 drawn from the peeled end 2a of the multicore cable 1. It can be permeated and filled to every corner, and the water stop performance between the electric wires 3 can be enhanced. In particular, by providing the partition wall 11 of the hot melt block 10 in a cross-shaped cross section, the center 11C of each partition wall 11 that protrudes in a cross-shaped cross section in the vicinity of the central axis of an electric wire bundle that has conventionally been difficult to fill with a water-stopping agent. The hot melt can always be present in the region by arranging the above, and the water stopping performance between the electric wires 3 can be further improved.

また、ホットメルトブロック１０が組み付けられた電線３の外周から多芯ケーブル１先端側のシース２の外周にかけての領域に、内周面に接着剤１２ａが塗布された防水熱収縮チューブ１２を被せることで、その後の加熱処理により、溶融したホットメルト１０Ｍの電線３間への充填と防水熱収縮チューブ１２の熱収縮とを同時に行うことができる。即ち、皮剥ぎ端２ａから引き出される電線３間の止水と、該電線３の外周側およびシース２外周側の止水を同時に行うことができるため、多芯ケーブル１端末の止水性能と止水作業性を共に向上させることができる。   In addition, a waterproof heat-shrinkable tube 12 having an inner peripheral surface coated with an adhesive 12a is placed over an area from the outer periphery of the electric wire 3 to which the hot melt block 10 is assembled to the outer periphery of the sheath 2 on the distal end side of the multicore cable 1. In the subsequent heat treatment, filling of the molten hot melt 10M between the electric wires 3 and the heat shrinkage of the waterproof heat shrinkable tube 12 can be performed simultaneously. That is, since the water stop between the electric wires 3 drawn from the peeled end 2a and the water stop on the outer peripheral side of the electric wire 3 and the outer peripheral side of the sheath 2 can be performed at the same time, Both water workability can be improved.

図６および図７は本発明の第２実施形態を示している。
第２実施形態では、多芯ケーブル１の皮剥ぎ端２ａから引き出される電線３間の止水に、図６に示す形状のホットメルトブロック２０を用いている点以外は第１実施形態と同様としている。 6 and 7 show a second embodiment of the present invention.
In 2nd Embodiment, it is the same as that of 1st Embodiment except the point which uses the hot-melt block 20 of the shape shown in FIG. 6 for the water stop between the electric wires 3 pulled out from the peeled end 2a of the multi-core cable 1. Yes.

本実施形態で用いるホットメルトブロック２０は、断面十字状に形成した各仕切壁２１の外端面に外接する外筒部２２を備え、図７に示すように、隣接する２枚の仕切壁２１と外筒部２２の周壁で囲まれた空間Ｓ２に電線３を挿通することにより、ホットメルトブロック２０を電線３に組み付けている。ついで、ホットメルトブロック２０を組み付けた電線３の外周から多芯ケーブル１先端のシース２の外周にかけての領域に、第１実施形態と同様の防水熱収縮チューブを被せ、その後、第１実施形態と同様に加熱処理を行っている。   The hot melt block 20 used in the present embodiment includes an outer cylinder portion 22 circumscribing the outer end surface of each partition wall 21 formed in a cross shape in cross section, and as shown in FIG. 7, two adjacent partition walls 21 and The hot melt block 20 is assembled to the electric wire 3 by inserting the electric wire 3 into the space S <b> 2 surrounded by the peripheral wall of the outer cylindrical portion 22. Next, a region similar to that of the first embodiment is covered with a waterproof heat-shrinkable tube similar to that of the first embodiment over the region from the outer periphery of the electric wire 3 assembled with the hot melt block 20 to the outer periphery of the sheath 2 at the tip of the multicore cable 1. Similarly, heat treatment is performed.

前記のように、断面十字状に設けた各仕切壁２１の外端面に外接する外筒部２２を設け、隣接する２枚の仕切壁２１と外筒部２２の周壁とで囲まれた空間Ｓ２に各電線３を挿通させることで、電線３を１本ずつ確実に分離して挿通することができ、２本まとめて同一空間に挿通されるなどの電線挿通ミスを防ぐことができる。また、ホットメルトブロック２０に外筒部２２を設けることで、加熱によって各電線３の周囲により多くのホットメルトを充填させることができ、止水性能をさらに高めることができる。   As described above, the outer cylinder portion 22 that circumscribes the outer end surface of each partition wall 21 provided in a cross-shaped cross section is provided, and the space S <b> 2 surrounded by the adjacent two partition walls 21 and the peripheral wall of the outer cylinder portion 22. By inserting each electric wire 3 through, it is possible to reliably separate and insert the electric wires 3 one by one, and to prevent electric wire insertion mistakes such as inserting two wires together in the same space. Moreover, by providing the outer cylinder part 22 in the hot melt block 20, more hot melts can be filled in the periphery of each electric wire 3 by heating, and the water stop performance can be further enhanced.

ホットメルトブロックは、前記第１、第２実施形態で用いられるホットメルトブロックの形状に限定されるものではなく、例えば、図８（Ａ）に示すように、各電線３を挿通する断面円形状や断面長円形状の挿通穴３１を設け、該挿通穴３１の周壁を前記仕切壁とした円柱状のホットメルトブロック３０としてもよい。また、仕切壁４１の枚数は電線３の本数に対応させ、例えば、電線３の本数が３本の場合には、図８（Ｂ）および図８（Ｃ）のように３枚の仕切壁４１、５１を中心角１２０度間隔で断面放射状に形成したホットメルトブロック４０、５０とすることも好ましい。   The hot melt block is not limited to the shape of the hot melt block used in the first and second embodiments. For example, as shown in FIG. Alternatively, an insertion hole 31 having an oval cross section may be provided, and a cylindrical hot melt block 30 having the peripheral wall of the insertion hole 31 as the partition wall may be used. Further, the number of the partition walls 41 is made to correspond to the number of the electric wires 3. For example, when the number of the electric wires 3 is three, the three partition walls 41 are used as shown in FIGS. 8B and 8C. , 51 are also preferably hot melt blocks 40, 50 formed radially in cross section at intervals of a central angle of 120 degrees.

さらに、第１、第２実施形態では、皮剥ぎ端２ａから引き出される電線３がすべて絶縁被覆電線である多芯ケーブル１の端末止水にホットメルトブロック１０、２０を用いているが、複数本のコア線と１本のドレン線を金属箔からなるシールド層で被覆し、さらにシースで被覆したシールド線の端末止水にも本発明のホットメルトブロックを用いることができる。   Furthermore, in the first and second embodiments, the hot melt blocks 10 and 20 are used for the terminal water stop of the multi-core cable 1 in which all the wires 3 drawn from the peeled end 2a are insulation-coated wires. The hot melt block of the present invention can also be used for terminal water stop of a shielded wire in which the core wire and one drain wire are covered with a shield layer made of a metal foil and further covered with a sheath.

１ 多芯ケーブル
２ シース
２ａ 皮剥ぎ端
３ 電線
１０、２０、３０、４０、５０ ホットメルトブロック
１１、２１、４１、５１ 仕切壁
２２ 外筒部
１２ 防水熱収縮チューブ
１２ａ 接着剤 DESCRIPTION OF SYMBOLS 1 Multi-core cable 2 Sheath 2a Skinning end 3 Electric wire 10, 20, 30, 40, 50 Hot melt block 11, 21, 41, 51 Partition wall 22 Outer cylinder part 12 Waterproof heat shrinkable tube 12a Adhesive

Claims (6)

複数本の電線間に配置されて該電線を１本ずつ仕切る仕切壁を長さ方向に備え、
該仕切壁を前記電線間に配置した状態で加熱溶融されることにより、前記電線間に充填されることを特徴とする線間止水用のホットメルトブロック。 A partition wall arranged between a plurality of electric wires and partitioning the electric wires one by one is provided in the length direction,
A hot-melt block for line water stop, which is filled between the electric wires by being melted by heating in a state where the partition walls are arranged between the electric wires. 前記電線の本数に相当する枚数の前記仕切壁を断面放射状に設け、隣接する２枚の前記仕切壁に挟まれた空間に前記各電線を挿通させる構成としている請求項１に記載の線間止水用のホットメルトブロック。   2. The line stop according to claim 1, wherein the number of the partition walls corresponding to the number of the electric wires is provided in a radial cross section, and the electric wires are inserted into a space sandwiched between the two adjacent partition walls. Hot melt block for water. 前記断面放射状に設けた各仕切壁の外端面に外接する外筒部を備え、隣接する２枚の前記仕切壁と前記外筒部の周壁とで囲まれた空間に前記各電線を挿通させる構成としている請求項２に記載の線間止水用のホットメルトブロック。   A configuration comprising an outer cylinder portion circumscribing the outer end surface of each partition wall provided radially in the cross section, and inserting each electric wire into a space surrounded by two adjacent partition walls and the peripheral wall of the outer cylinder portion The hot-melt block for line-stopping water according to claim 2. 押出成形で形成している請求項１乃至請求項３のいずれか１項に記載の線間止水用のホットメルトブロック。   The hot melt block for line-stopping water according to any one of claims 1 to 3, wherein the hot-melt block is formed by extrusion molding. 多芯ケーブルの先端の皮剥ぎ端から複数本の電線を引き出し、
該引き出した複数本の電線に請求項１乃至請求項４のいずれか１項に記載のホットメルトブロックを該ホットメルトブロックの仕切壁を前記電線間に配置した状態で組み付け、
ついで、前記ホットメルトブロックを組み付けた前記電線の外周から前記多芯ケーブル先端のシースの外周にかけての領域に、内周面に接着剤が塗布された防水熱収縮チューブを被せ、
その後、加熱処理をして、前記ホットメルトブロックを溶融させ前記電線間に充填させて該電線間を止水すると共に、前記防水熱収縮チューブを熱収縮させて前記電線の外周側および前記多芯ケーブルのシース外周側を止水することを特徴とするホットメルトブロックを用いた多芯ケーブルの端末止水方法。 Pull out multiple wires from the peeled end of the tip of the multicore cable,
Assembling the hot melt block according to any one of claims 1 to 4 with the partition walls of the hot melt block disposed between the electric wires to the plurality of drawn electric wires,
Next, a region from the outer periphery of the electric wire assembled with the hot melt block to the outer periphery of the sheath at the tip of the multi-core cable is covered with a waterproof heat-shrinkable tube having an inner surface coated with an adhesive,
Thereafter, heat treatment is performed to melt the hot melt block and fill between the wires to stop water between the wires, and to thermally shrink the waterproof heat-shrinkable tube so that the outer peripheral side of the wires and the multicore A terminal water stopping method for a multi-core cable using a hot melt block, characterized in that the outer periphery of the cable sheath is stopped. 請求項５に記載の端末止水方法で得られる多芯ケーブルの端末止水構造。   The terminal water stop structure of the multi-core cable obtained by the terminal water stop method according to claim 5.
JP2011044751A 2011-03-02 2011-03-02 Hot melt block for inter-wire water cut-off and terminal water cut-off method for multicore cable using hot melt block, and terminal water cut-off structure Withdrawn JP2012182924A (en)

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PCT/JP2011/074640 WO2012117608A1 (en) 2011-03-02 2011-10-26 Hot-melt block for waterproofing between wires, method for waterproofing multicore cable terminal using said hot-melt block, and terminal-waterproofing structure

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