JP2010102923A - Power cord with antistatic function - Google Patents

Power cord with antistatic function Download PDF

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JP2010102923A
JP2010102923A JP2008272860A JP2008272860A JP2010102923A JP 2010102923 A JP2010102923 A JP 2010102923A JP 2008272860 A JP2008272860 A JP 2008272860A JP 2008272860 A JP2008272860 A JP 2008272860A JP 2010102923 A JP2010102923 A JP 2010102923A
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cord
antistatic
electrical connection
resistance value
power cord
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JP5339345B2 (en
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Yorioki Matsumoto
頼興 松本
Kaoru Tamura
かおる 田村
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MATSUMOTO GIKEN KK
Matsumoto Giken Co Ltd
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MATSUMOTO GIKEN KK
Matsumoto Giken Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a power cord with antistatic function, which is excellent in wear resistance, can ensure the insulating property of an electric connecting terminal such as a plug without special insulating processing of the electric connecting terminal, and further can prevent the surface of the terminal or cord from being charged as much as possible. <P>SOLUTION: The power cord is provided with an electric connecting terminal 1. An insulating resin layer 1a of the electric connecting terminal 1 is selected to have electric resistance value of 10<SP>9</SP>(Ω). An antistatic layer 2b having electric resistance value of 10<SP>9</SP>(Ω) is formed on a surface of an insulating resin layer 2a of a cord 2 by extrusion molding. The antistatic layer 2b is formed transparently. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、例えばプラグやコネクタ等の電気接続端子とコードとが一体化されている電源コードに関し、更に詳しくは、クリーンルームでの使用に適するよう形成した帯電防止機能付き電源コードに関するものである。   The present invention relates to a power cord in which electrical connection terminals such as plugs and connectors are integrated with a cord, and more particularly to a power cord with an antistatic function formed so as to be suitable for use in a clean room.

従来、静電気対策が施された電線としては、導体としての金属線を絶縁樹脂で被覆し、その外面に帯電防止剤が噴霧されて帯電防止層が形成されているものがある（例えば特許文献１参照）。
また従来、静電気対策が施されたコードとしては、例えば特許文献２に記載されているものが知られている。この従来品は、電線を被覆する絶縁樹脂層の外側に、半導電性の樹脂被膜が押し出し成型法により形成されているものである。 2. Description of the Related Art Conventionally, an electric wire with a countermeasure against static electricity is one in which a metal wire as a conductor is covered with an insulating resin and an antistatic agent is sprayed on the outer surface thereof (for example, Patent Document 1). reference).
Conventionally, for example, a cord described in Patent Document 2 is known as a cord that has been subjected to static electricity countermeasures. In this conventional product, a semiconductive resin film is formed on the outside of an insulating resin layer covering an electric wire by an extrusion molding method.

而して、帯電防止剤を噴霧することにより、帯電防止層が形成される場合は、通常、耐摩耗性が低いため、帯電防止剤が剥がれて塵埃化するのを避けられないものである。従ってこの種のコードは、半導体製造工場や手術室等のクリーンルームでの使用には適さない。   Thus, when an antistatic layer is formed by spraying an antistatic agent, the antistatic agent usually has low wear resistance, so it is inevitable that the antistatic agent will peel off and become dust. Therefore, this type of code is not suitable for use in a clean room such as a semiconductor manufacturing factory or an operating room.

これに対し、帯電防止層を押し出し成型法で形成する場合は、耐磨耗性の問題については解消する。
しかしながら従来、この種のコードは、帯電防止層を、界面活性剤入りの樹脂で成型することが多かった。従ってこれによると、電気抵抗値が１０１０（Ω）〜１０１１（Ω）となり、帯電し易くなって静電気対策上、効果が小さいものであった。 On the other hand, when the antistatic layer is formed by an extrusion molding method, the problem of wear resistance is solved.
Conventionally, however, in this type of cord, the antistatic layer is often molded from a resin containing a surfactant. Therefore, according to this, the electric resistance value becomes 10 10 (Ω) to 10 11 (Ω), and it becomes easy to be charged, and the effect is small for the countermeasure against static electricity.

ところで、プラグ等の電気接続端子の刃間の絶縁抵抗は、規格として１０９（Ω）以上と決められている。これ以下の場合は、中子を絶縁物で作って規格の絶縁性を担保する必要があり、この場合はプラグ等の成型工程、加工工程が増加する、という問題が生じるものである。 By the way, the insulation resistance between the blades of electrical connection terminals such as plugs is determined to be 10 9 (Ω) or more as a standard. In the case of less than this, it is necessary to secure the insulation of the standard by making the core with an insulator. In this case, there arises a problem that the molding process and the processing process of the plug and the like increase.

而して、通常、絶縁物の電気抵抗値は、１０１２（Ω）以上と言われているが、電気接続端子やコードの帯電防止層の電気抵抗値を、１０１０（Ω）以上に選定すると、絶縁性が高まり、それに応じて静電気も帯び易くなるものである。
従って本来、クリーンルーム等で使用する電源コードに静電気対策を施す場合は、表面の耐摩耗性を有し、プラグ等の電気接続端子の絶縁性を特別な部品を必要とすることなく確保でき、しかも帯電防止層が静電気を帯びることを極力抑えることができるよう形成されているのが望ましい。
特開平８−２３５９３６号公報 特開平７−２８８０３９号公報 Thus, the electrical resistance value of the insulator is usually said to be 10 12 (Ω) or more, but the electrical resistance value of the antistatic layer of the electrical connection terminal and cord is selected to be 10 10 (Ω) or more. As a result, the insulating property is enhanced, and static electricity is easily generated accordingly.
Therefore, when taking measures against static electricity on a power cord used in a clean room, etc., it has surface wear resistance and can ensure insulation of electrical connection terminals such as plugs without the need for special parts. It is desirable that the antistatic layer be formed so as to be able to suppress static electricity as much as possible.
JP-A-8-235936 JP-A-7-288039

本発明は、このような従来の実情に鑑み、提案されたものである。
従って本発明の解決しようとする技術的課題は、耐摩耗性に優れ、またプラグ等の電気接続端子を特別に絶縁加工することなく、電気接続端子の絶縁性を確保でき、しかも端子やコードの表面が帯電することを極力抑えることができるよう形成した帯電防止機能付き電源コードを提供することにある。 The present invention has been proposed in view of such a conventional situation.
Therefore, the technical problem to be solved by the present invention is excellent in wear resistance, and can ensure the insulation of the electrical connection terminals without specially insulating the electrical connection terminals such as plugs. An object of the present invention is to provide a power cord with an antistatic function formed so that the surface can be prevented from being charged as much as possible.

本発明は、上記の課題を解決するため、次ぎのような技術的手段を採る。
即ち本発明の電源コードは、図１に示されるように、電気接続端子１付きの電源コードであって、上記の電気接続端子１の絶縁樹脂層１ａが、１０９（Ω）の電気抵抗値に選定され、コード２の絶縁樹脂層２ａの表面に、電気抵抗値が１０９（Ω）の帯電防止層２ｂが押し出し成型法で形成されていることを特徴とする（請求項１）。 The present invention adopts the following technical means in order to solve the above problems.
That is, the power cord of the present invention is a power cord with an electrical connection terminal 1 as shown in FIG. 1, and the insulating resin layer 1a of the electrical connection terminal 1 has an electrical resistance value of 10 9 (Ω). The antistatic layer 2b having an electric resistance value of 10 9 (Ω) is formed on the surface of the insulating resin layer 2a of the cord 2 by an extrusion molding method (claim 1).

また本発明の他の構成としては、次ぎのものがある。
即ち、この本発明は、図２に示されるように、電気接続端子１付きの電源コードであって、上記の電気接続端子１の絶縁樹脂層１ａの表面に、電気抵抗値が１０９（Ω）の帯電防止層１ｂが射出成型法で形成され、コード２の絶縁樹脂層２ａの表面に、電気抵抗値が１０９（Ω）の帯電防止層２ｂが押し出し成型法で形成されていることを特徴とする（請求項２）。 Other configurations of the present invention include the following.
That is, as shown in FIG. 2, the present invention is a power cord with an electrical connection terminal 1, and an electrical resistance value of 10 9 (Ω on the surface of the insulating resin layer 1a of the electrical connection terminal 1 described above. ) Is formed by an injection molding method, and an antistatic layer 2b having an electrical resistance value of 10 9 (Ω) is formed on the surface of the insulating resin layer 2a of the cord 2 by an extrusion molding method. It is characterized (claim 2).

またこれらの本発明の場合、帯電防止層１ｂ、２ｂは、透明状に形成されているのが好ましい（請求項３）。
なぜならこれによると、コード２等の絶縁樹脂層２ａの表面に印刷等の手段で施されている文字や記号等を判読でき、あらためて帯電防止層１ｂ、２ｂの表面に、この種の文字等を表示する手間暇を一掃できるからである。 In the present invention, the antistatic layers 1b and 2b are preferably formed to be transparent (Claim 3).
Because, according to this, it is possible to read characters and symbols applied on the surface of the insulating resin layer 2a such as the code 2 by means of printing or the like, and this type of character or the like is again applied to the surfaces of the antistatic layers 1b and 2b. It is because the time and effort to display can be wiped out.

本発明は、このように電気接続端子の絶縁樹脂層を、１０９（Ω）の電気抵抗値に選定し、コードの絶縁樹脂層の表面に、電気抵抗値が１０９（Ω）の帯電防止層を押し出し成型法で形成しているものである。
従って本発明の場合は、押し出し成型により帯電防止層の耐摩耗性が高いため、静電気対策の被膜が剥がれて塵埃化する、という従来の問題を解消できる。
またこれによると、プラグ等の電気接続端子の絶縁性を特別な部品を必要とすることなく規格通りに確保でき、更には電気接続端子とコードの表面に静電気が帯びることを極力抑えることができる。 The present invention thus insulating resin layer of the electrical connection terminals, selects the electrical resistance of 10 9 (Ω), the surface of the insulating resin layer code, antistatic electrical resistance 10 9 (Ω) The layer is formed by an extrusion molding method.
Therefore, in the case of the present invention, since the antistatic layer has high wear resistance by extrusion molding, the conventional problem that the antistatic coating film is peeled off and becomes dust can be solved.
In addition, according to this, insulation of electrical connection terminals such as plugs can be ensured as required without requiring special parts, and furthermore, static electricity can be suppressed as much as possible from the electrical connection terminals and the surface of the cord. .

また請求項２記載の本発明は、電気接続端子の絶縁樹脂層の表面に、電気抵抗値が１０９（Ω）の帯電防止層が射出成型法で形成され、コードの絶縁樹脂層の表面に、電気抵抗値が１０９（Ω）の帯電防止層が押し出し成型法で形成されているものである。
従ってこれによると、上記の耐摩耗性等の問題を解決できると共に、電気接続端子が、１０１０（Ω）以上の値に絶縁性が高く形成されている場合でも、電気接続端子の表面が帯電することを、コードと共に極力抑えることができる。 According to the second aspect of the present invention, an antistatic layer having an electric resistance value of 10 9 (Ω) is formed by an injection molding method on the surface of the insulating resin layer of the electrical connection terminal, and is formed on the surface of the insulating resin layer of the cord. The antistatic layer having an electric resistance value of 10 9 (Ω) is formed by an extrusion molding method.
Therefore, according to this, the above-mentioned problems such as abrasion resistance can be solved, and the surface of the electrical connection terminal is charged even when the electrical connection terminal is formed with a high insulation property at a value of 10 10 (Ω) or more. Can be suppressed as much as possible together with the cord.

以下、本発明を実施するための最良の形態を説明する。
本発明は、図１等に示されるように、電気接続端子１付きの電源コードである。この実施形態では、コード２の一端に、電気接続端子１としてのプラグ１１が、他端にコネクタ１２が接続されている。 Hereinafter, the best mode for carrying out the present invention will be described.
The present invention is a power cord with an electrical connection terminal 1 as shown in FIG. In this embodiment, a plug 11 as an electrical connection terminal 1 is connected to one end of the cord 2 and a connector 12 is connected to the other end.

本発明の場合、電気接続端子１の絶縁樹脂層１ａは、１０９（Ω）の電気抵抗値に選定され、コード２の絶縁樹脂層２ａの表面に、電気抵抗値が１０９（Ω）の帯電防止層２ｂが押し出し成型法で形成されている。帯電防止層２ｂの膜厚は、この実施形態では、０．２ｍｍに選定されている。またこの実施形態の本発明品は、コード２の帯電防止層２ｂが、透明状に形成されている。なお、３は電線である。 For the present invention, the insulating resin layer 1a of the electrical connection terminal 1 is selected as the electrical resistance of 10 9 (Omega), the surface of the insulating resin layer 2a code 2, the electrical resistance value of 10 9 (Omega) The antistatic layer 2b is formed by an extrusion molding method. In this embodiment, the film thickness of the antistatic layer 2b is selected to be 0.2 mm. In the product of this embodiment of the present invention, the antistatic layer 2b of the cord 2 is formed in a transparent state. In addition, 3 is an electric wire.

プラグ１１等の電気接続端子１は、挿し込み時に強度が必要のため、絶縁樹脂層１ａは、例えばポリウレタン系、ポリオレフィン系、ポリエステル系の硬質樹脂で形成されるのが良い。またコード２は、フレキシブル性が要求されるから、例えばポリウレタン系の軟質樹脂で成型されるのが良い。   Since the electrical connection terminal 1 such as the plug 11 needs strength when inserted, the insulating resin layer 1a is preferably formed of, for example, a polyurethane, polyolefin, or polyester hard resin. Since the cord 2 is required to be flexible, the cord 2 is preferably molded from, for example, a polyurethane-based soft resin.

而して本発明品を製造する場合は、先ず、電気抵抗値が１０９（Ω）の軟質樹脂を押し出し成型してコード２に、帯電防止層２ｂを形成する。次ぎに、このコード２と、端子形成用の金属部品を、金型のキャビティにセットし、電気抵抗値が１０９（Ω）の硬質性の樹脂をキャビティに射出し、一体成型することにより、本発明品は形成されるものである。 Thus, when the product of the present invention is manufactured, first, a soft resin having an electric resistance value of 10 9 (Ω) is extruded to form the antistatic layer 2 b on the cord 2. Next, the cord 2 and the metal parts for terminal formation are set in the cavity of the mold, and a hard resin having an electric resistance value of 10 9 (Ω) is injected into the cavity and integrally molded. The product of the present invention is formed.

この実施形態に係る本発明品は、具体的には、ルーブリゾール アドバンスド マテリアルズ インコーポレイテッド（Ｌｕｂｒｉｚｏｌ Ａｄｖａｎｃｅｄ Ｍａｔｅｒｉａｌｓ Ｉｎｃ，米国法人）のポリウレタン系ポリマー導電樹脂（ＳＴＡＴ−ＲＩＴＥ（商標名）、品番Ｘ−５０９１）でコード２が成型され、電気接続端子１は、同社のポリオレフィン系ポリマー導電樹脂で成型されている。   Specifically, the product of the present invention according to this embodiment is a polyurethane-based polymer conductive resin (STAT-RITE (trade name), product number X-5091) of Lubrizol Advanced Materials Inc. (US corporation). ), The cord 2 is molded, and the electrical connection terminal 1 is molded of the company's polyolefin polymer conductive resin.

次ぎに、請求項２記載の本発明の実施形態を、図２に従って説明する。
この本発明品は、電気接続端子１の絶縁樹脂層１ａの表面に、電気抵抗値が１０９（Ω）の帯電防止層１ｂが射出成型法により形成されている。 Next, an embodiment of the present invention as set forth in claim 2 will be described with reference to FIG.
In the product of the present invention, an antistatic layer 1b having an electric resistance value of 10 9 (Ω) is formed on the surface of the insulating resin layer 1a of the electrical connection terminal 1 by an injection molding method.

またこの本発明の場合は、コード２の絶縁樹脂層２ａの表面に、電気抵抗値が１０９（Ω）の帯電防止層２ｂが押し出し成型法で形成されている。電気接続端子１とコード２の帯電防止層１ｂ、２ｂを形成する樹脂材は、上例と同様であり、また帯電防止層１ｂ、２ｂは透明状に形成されているのが良い。 In the case of the present invention, an antistatic layer 2b having an electric resistance value of 10 9 (Ω) is formed on the surface of the insulating resin layer 2a of the cord 2 by an extrusion molding method. The resin material for forming the electrical connection terminals 1 and the antistatic layers 1b and 2b of the cord 2 is the same as the above example, and the antistatic layers 1b and 2b are preferably formed in a transparent state.

この本発明の場合は、先ず、コード２の帯電防止層２ｂを押し出し成型で形成する。次ぎに、このコード２を端子形成用の金属部品と一緒に金型のキャビティにセットし、１０１０（Ω）以上の電気抵抗値の硬質樹脂で、電気接続端子１の絶縁樹脂層１ａを射出成型する。その後、電気接続端子１の絶縁樹脂層１ａの表面に、１０９（Ω）の電気抵抗値の硬質樹脂を射出し、帯電防止層１ｂを二次成型することにより、実現されるものである。 In the case of the present invention, first, the antistatic layer 2b of the cord 2 is formed by extrusion molding. Next, the cord 2 is set in the mold cavity together with the metal parts for terminal formation, and the insulating resin layer 1a of the electrical connection terminal 1 is injected with a hard resin having an electric resistance value of 10 10 (Ω) or more. Mold. Thereafter, a hard resin having an electric resistance value of 10 9 (Ω) is injected onto the surface of the insulating resin layer 1a of the electrical connection terminal 1, and the antistatic layer 1b is secondarily molded.

以上の処において、本発明の場合、帯電防止層１ｂ、２ｂの膜厚は、上例に限定されるものではない。この膜厚は、通常、厚くするほど電気抵抗が減り、静電気を逃し易くなるから、規格の範囲内（０．５（ｍｍ）厚まで許容）で、コストとの兼ね合いにより適宜選定されるので良い。   In the above process, in the present invention, the film thickness of the antistatic layers 1b and 2b is not limited to the above example. This film thickness is usually selected as appropriate in consideration of cost and within the standard range (thickness up to 0.5 (mm) thickness) because the electrical resistance decreases and the static electricity easily escapes as the film thickness increases. .

本発明のコードの好適な一実施形態を示し、Ａは平面図、ＢはＡのＢ−Ｂ線拡大断面図である。1 shows a preferred embodiment of the cord of the present invention, in which A is a plan view and B is an enlarged sectional view taken along line BB of A. FIG. 本発明の他のコードの一実施形態を示し、Ａは平面図、ＢはＡのＢ−Ｂ線要部拡大断面図、ＣはＡのＣ−Ｃ線拡大断面図である。1 shows another embodiment of the cord of the present invention, in which A is a plan view, B is an enlarged cross-sectional view taken along line B-B of A, and C is an enlarged cross-sectional view taken along line C-C of A. FIG.

符号の説明Explanation of symbols

１ 電気接続端子
１ａ 絶縁樹脂層
１ｂ 帯電防止層
２ コード
２ａ 絶縁樹脂層
２ｂ 帯電防止層
３ 電線 DESCRIPTION OF SYMBOLS 1 Electrical connection terminal 1a Insulating resin layer 1b Antistatic layer 2 Cord 2a Insulating resin layer 2b Antistatic layer 3 Electric wire

Claims (3)

電気接続端子付きの電源コードであって、上記の電気接続端子の絶縁樹脂層が、１０９（Ω）の電気抵抗値に選定され、コードの絶縁樹脂層の表面に、電気抵抗値が１０９（Ω）の帯電防止層が押し出し成型法で形成されていることを特徴とする帯電防止機能付き電源コード。 A power cord with an electrical connection terminal, wherein the insulating resin layer of the electrical connection terminal is selected to have an electrical resistance value of 10 9 (Ω), and the electrical resistance value is 10 9 on the surface of the insulating resin layer of the cord. A power cord with an antistatic function, wherein an antistatic layer of (Ω) is formed by an extrusion molding method. 電気接続端子付きの電源コードであって、上記の電気接続端子の絶縁樹脂層の表面に、電気抵抗値が１０９（Ω）の帯電防止層が射出成型法で形成され、コードの絶縁樹脂層の表面に、電気抵抗値が１０９（Ω）の帯電防止層が押し出し成型法で形成されていることを特徴とする帯電防止機能付き電源コード。 A power cord with an electrical connection terminal, wherein an antistatic layer having an electrical resistance value of 10 9 (Ω) is formed on the surface of the insulation resin layer of the electrical connection terminal by an injection molding method, and the insulation resin layer of the cord A power cord with an antistatic function, characterized in that an antistatic layer having an electric resistance value of 10 9 (Ω) is formed on the surface of the wire by an extrusion molding method. 請求項１又は２記載の帯電防止機能付き電源コードであって、帯電防止層が、透明状に形成されていることを特徴とする帯電防止機能付き電源コード。   The power cord with an antistatic function according to claim 1 or 2, wherein the antistatic layer is formed in a transparent state.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014150827A1 (en) * 2013-03-15 2014-09-25 Commscope, Inc. Of North Carolina Low static discharge lan twisted pair cable

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JPS5719829U (en) * 1980-07-09 1982-02-02
JPH03102708A (en) * 1989-09-14 1991-04-30 Canon Inc High-voltage cable unit
JPH07182925A (en) * 1993-12-24 1995-07-21 Showa Electric Wire & Cable Co Ltd Insulated wire
JPH08235936A (en) * 1995-02-28 1996-09-13 Fujikura Ltd Dislocation wire
JP2000357418A (en) * 1999-04-14 2000-12-26 Yazaki Corp Insulated wire
JP2002342705A (en) * 2001-05-14 2002-11-29 Nakamura Denki Seisakusho:Kk Code reading scanner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5719829U (en) * 1980-07-09 1982-02-02
JPH03102708A (en) * 1989-09-14 1991-04-30 Canon Inc High-voltage cable unit
JPH07182925A (en) * 1993-12-24 1995-07-21 Showa Electric Wire & Cable Co Ltd Insulated wire
JPH08235936A (en) * 1995-02-28 1996-09-13 Fujikura Ltd Dislocation wire
JP2000357418A (en) * 1999-04-14 2000-12-26 Yazaki Corp Insulated wire
JP2002342705A (en) * 2001-05-14 2002-11-29 Nakamura Denki Seisakusho:Kk Code reading scanner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014150827A1 (en) * 2013-03-15 2014-09-25 Commscope, Inc. Of North Carolina Low static discharge lan twisted pair cable

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