JP2000268635A - Snow accretion preventing type overhead electric wire and wire line thereof - Google Patents
Snow accretion preventing type overhead electric wire and wire line thereofInfo
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- JP2000268635A JP2000268635A JP11076362A JP7636299A JP2000268635A JP 2000268635 A JP2000268635 A JP 2000268635A JP 11076362 A JP11076362 A JP 11076362A JP 7636299 A JP7636299 A JP 7636299A JP 2000268635 A JP2000268635 A JP 2000268635A
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- Prior art keywords
- overhead electric
- electric wire
- snow
- electric wires
- wire
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、着雪防止効果お
よびセルフクリーニング効果が期待できる架空送電線や
架空地線（光ファイバを複合したＯＰＧＷも含む）等の
架空電線およびその線路に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overhead power line such as an overhead power transmission line or an overhead ground wire (including an OPGW including an optical fiber), which is expected to have an effect of preventing snow accumulation and a self-cleaning effect, and a line thereof. .
【０００２】[0002]
【従来の技術】鉄塔間にわたって架設されている架空送
電線や架空地線（ＯＰＧＷも含む）等の架空電線が、こ
れに雪が付着堆積することが要因となって断線その他の
種々の事故を生じたり、また電線に付着堆積した雪の落
下により線路下工作物などが被害を蒙ることのないよう
に、電線への着雪を防止するための技術の開発が要請さ
れており、既に従来より種々の提案がなされている。2. Description of the Related Art Aerial power lines such as overhead power transmission lines and overhead ground wires (including OPGW) installed between steel towers cause disconnection and various other accidents due to the adhesion and deposition of snow on the overhead power lines. There is a demand for the development of technology to prevent snow from accumulating on electric wires, so that the work under the track is not damaged by falling snow that has accumulated on the electric wires. The proposal has been made.
【０００３】従来提供されているこの種の技術として、
（イ）電線外周上に付着し、電線の撚り溝に沿って移動
しながら発達する雪を電線外周に取り付けたリングに衝
突させて電線から離脱落下させるようにした技術、
（ロ）電線に重錘を吊持状態に取り付けることにより、
電線が円周方向にねじり回転するのを阻止するように
し、これにより電線に付着した雪の偏心荷重によって電
線が円周方向に回動され、やがて雪が電線の円周全体に
わたって筒状に堆積発達していくのを防止するようにし
た技術、（ハ）電線上に付着堆積した雪を電線に装着し
た低キュリー磁性金属部材の渦電流によるジュール発熱
およびヒステリシス損の増加に伴う発熱を利用して融雪
除去するようにした技術、（ニ）電線の撚線層間を絶縁
して、何れかの撚線層のみに電流を流して電線の温度を
上昇させ、これにより電線に付着した雪を融解するよう
にした技術、（ホ）裸金属線条に絶縁素線を撚り込ん
で、この絶縁素線を通電加熱して電線に付着した雪を融
解するようにした技術、（ヘ）電線表面に弗素樹脂のテ
ープを巻き付けたり、弗素樹脂の被膜を設けたりして、
電線表面を撥水性の表面状態とさせて雪が付着しにくく
するようにした技術、等が知られているが、しかしこれ
らの各技術にはそれぞれ次のような問題が見られる。[0003] As this kind of technology conventionally provided,
(B) A technology in which snow that adheres to the outer periphery of the electric wire and develops while moving along the twisted groove of the electric wire is caused to collide with a ring attached to the outer periphery of the electric wire to drop off the electric wire,
(B) By attaching the weight to the wire in a suspended state,
The wire is prevented from twisting and rotating in the circumferential direction, which causes the wire to rotate in the circumferential direction due to the eccentric load of snow attached to the wire, and eventually snow develops in a cylindrical shape over the entire circumference of the wire. (C) Utilizing the Joule heat generated by the eddy current of the low-Curie magnetic metal member attached to the electric wire to the snow deposited on the electric wire and the heat generated by the increase in hysteresis loss (D) Insulating between the stranded layers of the electric wire, applying current to only one of the stranded layers to raise the temperature of the electric wire, thereby melting the snow attached to the electric wire. (E) twisting an insulated wire into a bare metal wire, heating the insulated wire to melt the snow attached to the wire, and (f) fluorine on the wire surface Wrapping resin tape, And it may be provided a film of fluororesin,
Techniques are known in which the surface of the electric wire is made water-repellent to make it difficult for snow to adhere thereto. However, each of these techniques has the following problems.
【０００４】[0004]
【発明が解決しようとする課題】すなわち、上記（イ）
の技術においては、電線に付着する雪の量が多量となる
場合には、一部の雪はリングに衝突して離脱落下するも
のの、離脱落下しきれない雪が残り、そしてその上にさ
らに着雪が生じて雪の偏心荷重により電線が円周方向に
ねじり回転し、やがて雪が筒雪に発達していくのを阻止
し得ないものであった。That is, the above (a)
According to the technique described in the above, when the amount of snow attached to the electric wire becomes large, some snow collides with the ring and drops off, but snow that cannot be dropped off remains, and further snow accumulates on it. Then, the eccentric load of the snow causes the electric wire to twist and rotate in the circumferential direction, so that it is impossible to prevent the snow from developing into a tube snow.
【０００５】また（ロ）の技術においては、電線の円周
方向への回転を確実に阻止するためには、電線の長手方
向に比較的小間隔を置いて多数の重錘を吊持させなけれ
ばならず、これがために電線の径間全長にわたって常時
大きな荷重が作用して弛度の著しい増大を招く。また弛
度の増大を防ごうとするときには、電線に極めて大きな
架線張力を作用させることになる。このように常に大き
な荷重や張力を作用させることは電線にとって好ましい
ものではなく、かつそうしたからといって電線への雪の
筒状付着堆積を確実に防止し得るとも限らないものであ
った。In the technique (b), in order to reliably prevent the electric wire from rotating in the circumferential direction, a large number of weights must be suspended at relatively small intervals in the longitudinal direction of the electric wire. For this reason, a large load is always applied over the entire span of the wire, resulting in a remarkable increase in the sag. When an attempt is made to prevent the sag from increasing, an extremely large overhead wire tension is applied to the electric wire. It is not preferable for the electric wire to always apply a large load or tension as described above, and that does not necessarily mean that it is possible to reliably prevent the cylindrical attachment and accumulation of snow on the electric wire.
【０００６】さらに（ハ）の技術においては、夜間など
の着氷雪が生じやすいと思われ、しかも負荷が小さく線
路（送電線）に充電電流程度しか流れていない場合や、
電流が殆ど流れていない架空地線等においては、低キュ
リー磁性金属部材の発熱が小さく、十分な発熱量が得ら
れないために融雪効果が期待できないものとなる。Further, in the technique (c), it is considered that icing and snow are likely to occur at night or the like, and the load is small and only a charging current flows through a line (transmission line).
In an overhead ground wire or the like through which little current flows, the heat generation of the low-Curie magnetic metal member is small, and a sufficient heat generation amount cannot be obtained, so that the snow melting effect cannot be expected.
【０００７】またさらに（ニ）の技術においては、電線
の温度を上昇させるために絶縁された何れかの撚線層に
流す電流は、本線を流れる電流を利用するものであり、
そのため上述の（ハ）の技術と同様に、負荷が小さい夜
間などの送電線や架空地線等においてはその温度上昇が
十分でなく、融雪効果を期待できないものとなる。また
送電線にあってはその接続部や引留部の構造がむずかし
くなる問題もある。Further, in the technique (d), the current flowing through any of the insulated stranded layers in order to raise the temperature of the electric wire utilizes the current flowing through the main line.
Therefore, similarly to the above-mentioned technology (c), the temperature of a power transmission line or an overhead ground wire at night or the like where the load is small is not sufficiently increased, and the snow melting effect cannot be expected. In addition, there is a problem that the structure of the connection portion and the staying portion of the transmission line becomes difficult.
【０００８】さらにまた（ホ）の技術においては、絶縁
素線に通電するための他の電源が必要になるので線路設
備の複雑化を招き、かつ絶縁素線の絶縁物の耐電圧上か
らあまり長い距離にわたって１つの電源で絶縁素線を加
熱することが不可能である難点がある。Further, in the technique (e), another power supply for supplying current to the insulated wire is required, which complicates the line facilities, and is not very effective in terms of withstand voltage of the insulator of the insulated wire. There is a disadvantage that it is not possible to heat the insulated wire with one power supply over a long distance.
【０００９】そしてまた（ヘ）の技術においては、電線
表面を撥水性の表面状態とさせる弗素樹脂は水をはじく
性質が強いが、屋外の過酷な自然環境の下にある架空電
線においては、汚れが付着しやすく、その性能が早期に
落ちるので、耐久性が問題となり、所期の効果を長期に
わたって持続し難い欠点がある。According to the technique (f), the fluororesin which makes the surface of the electric wire water-repellent has a strong property of repelling water. However, the overhead electric wire under the severe outdoor natural environment has a dirt. Is likely to adhere, and its performance deteriorates early. Therefore, durability becomes a problem, and there is a disadvantage that it is difficult to maintain the expected effect for a long time.
【００１０】この発明は、上述の（イ）〜（ヘ）の技術
に見られる欠点を有することなく、効果的に着雪を防止
することのできる新規な着雪防止型架空電線およびその
線路を提供することを目的とするものである。[0010] The present invention provides a new snow-prevention type overhead electric wire and its line which can effectively prevent snow from accumulating without the disadvantages found in the above-mentioned techniques (a) to (f). It is intended to provide.
【００１１】[0011]
【課題を解決するための手段】上記目的を達成するため
に、この発明においては、複数本の裸金属線条の撚り合
わせからなる架空電線の外面、または架空電線の外面を
覆うようにさせた金属テープに、アナタース型超撥水性
酸化チタンをコーティングして着雪防止型架空電線を構
成した。また、鉄塔間にわたって架設されている架空電
線における各種線路構成部材の外面に、アナタース型超
撥水性酸化チタンをコーティングして着雪防止型架空電
線路を構成した。In order to achieve the above object, according to the present invention, an outer surface of an overhead electric wire formed by twisting a plurality of bare metal wires or an outer surface of the overhead electric wire is covered. An anatase type super water-repellent titanium oxide was coated on a metal tape to form a snow-prevention type overhead electric wire. Further, the outer surface of various line components of the overhead electric wire installed between the steel towers was coated with anatase type super water-repellent titanium oxide to form a snow-prevention type overhead electric wire line.
【００１２】[0012]
【発明の実施の形態】以下、この発明に係る着雪防止型
架空電線およびその線路の実施の形態を図示の例によっ
て説明する。図１は請求項１に係る発明の第１実施形態
を示すものであって、架空電線２の最外層を形成する裸
金属線条１の外面部に、アナタース（Ａｎａｔａｓｅ）
型超撥水性酸化チタン３がコーティングされて着雪防止
型架空電線が構成されている。この実施例の場合には、
複数本の裸金属線条１を複数層にわたって撚り合わせて
架空電線２を構成した後、上記アナタース型超撥水性酸
化チタン３のコーティングを架空電線２の外面に施すこ
とになる。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a snow protection type overhead electric wire and its line according to the present invention. FIG. 1 shows a first embodiment of the invention according to claim 1, wherein an anatase is provided on an outer surface of a bare metal wire 1 forming an outermost layer of an overhead electric wire 2.
The super-water-repellent titanium oxide 3 is coated to form a snow-prevention type overhead electric wire. In this example,
After forming the overhead electric wire 2 by twisting a plurality of bare metal wires 1 over a plurality of layers, the outer surface of the overhead electric wire 2 is coated with the anatase type super water-repellent titanium oxide 3.
【００１３】図２は請求項１に係る発明の第２実施形態
を示すものであって、架空電線２の最外層を形成する各
裸金属線条１の全外周に、アナタース型超撥水性酸化チ
タン３がそれぞれ個別にコーティングされて着雪防止型
架空電線が構成されている。この実施態様の場合には、
予めアナタース型超撥水性酸化チタン３のコーティング
を施してなる複数本の裸金属線条１を最外層として撚り
合わせることになる。FIG. 2 shows a second embodiment of the invention according to the first aspect, in which an anatase type super water-repellent oxidation is applied to the entire outer periphery of each bare metal wire 1 forming the outermost layer of the overhead electric wire 2. Titanium 3 is individually coated to form a snow protection type overhead electric wire. In this embodiment,
A plurality of bare metal filaments 1 previously coated with an anatase type super water-repellent titanium oxide 3 are twisted as the outermost layer.
【００１４】図３は請求項２に係る発明の第１実施形態
を示すものであって、アナタース型超撥水性酸化チタン
３のコーティングが施されているアルミ等の金属テープ
４が、複数本の裸金属線条１の撚り合わせからなる架空
電線２の外周全体を一括して覆うように該架空電線２の
外周に巻き付けられて着雪防止型架空電線が構成されて
いる。FIG. 3 shows a first embodiment of the invention according to claim 2, wherein a plurality of metal tapes 4 made of aluminum or the like coated with an anatase type super water-repellent titanium oxide 3 are used. A snow prevention type overhead electric wire is formed by being wound around the outer periphery of the overhead electric wire 2 so as to collectively cover the entire outer periphery of the overhead electric wire 2 formed by twisting the bare metal filaments 1.
【００１５】図４は請求項２に係る発明の第２実施形態
を示すものであって、ここでは架空電線２の最外層を形
成する複数本の裸金属線条１が適宜本数づつに分けら
れ、その適宜本数づつに分けられた各裸金属線条１群の
外周に、アナタース型超撥水性酸化チタン３のコーティ
ングが施されているアルミ等の金属テープ４が巻き付け
られて着雪防止型架空電線が構成されている。FIG. 4 shows a second embodiment of the invention according to claim 2, in which a plurality of bare metal wires 1 forming the outermost layer of the overhead electric wire 2 are divided into appropriate numbers. A metal tape 4 such as aluminum coated with an anatase type super water-repellent titanium oxide 3 is wound around the outer periphery of each group of bare metal filaments, which are appropriately divided into a number, and a snow prevention type fictitious type. An electric wire is configured.
【００１６】図５は請求項３に係る発明の一実施形態を
示すものであって、鉄塔５間にわたって架設されている
架空電線２における例えばジャンパ導体６Ａ、ヨーク６
Ｂ、引留クランプ６Ｃ、ダンパ６Ｄ、アーマロッド６
Ｅ、スペーサ６Ｆ、低キュリー発熱線材６Ｇ、その他図
示されていない電線取り付け物品等の雪の付着が懸念さ
れる各種線路構成部材６の外面に、アナタース型超撥水
性酸化チタン３がコーティングされて着雪防止型架空電
線路が構成されている。なお、この場合の架空電線２と
しては、前記図１乃至図４に示した何れかのもの、すな
わち請求項１または請求項２に係る何れかの構成のもの
を使用するのがよい。こうすれば、各種線路構成部材６
および架空電線２からなる架空電線路構成物の総ての表
面を超撥水性のものとすることができる。FIG. 5 shows an embodiment of the invention according to claim 3, wherein, for example, a jumper conductor 6A and a yoke 6 in an overhead electric wire 2 installed between steel towers 5.
B, retaining clamp 6C, damper 6D, armor rod 6
E, anatase type super water-repellent titanium oxide 3 is coated on outer surfaces of various line components 6 such as a spacer 6F, a low-Curie heat-generating wire 6G, and other wire attachment articles (not shown) where snow is likely to adhere. A snow-prevention overhead power line is configured. As the overhead electric wire 2 in this case, it is preferable to use any of the ones shown in FIGS. 1 to 4, that is, any one of the structures according to the first or second aspect. In this case, various track components 6
In addition, all the surfaces of the overhead electric wire path component composed of the overhead electric wire 2 can be made super-water-repellent.
【００１７】上記図１乃至図５に示した各実施形態にお
いて、架空電線２の外面（図１および図２）や、架空電
線の外面を覆った金属テープ４の表面（図３および図
４）や、架空電線路における各種線路構成部材６Ａ〜６
Ｇの外面（図５）等のアナタース型超撥水性酸化チタン
３のコーティング（被膜）は、前述の従来技術（ヘ）に
おける電線表面である弗素樹脂の表面と水との接触角
（物質の表面の濡れやすさを示す数字であり、この角度
が小さいほど濡れやすく水が広がり、大きいほど水滴と
なってはじかれる）が１１０度程度であり、また従来撥
水性の限界と考えられていたフッ化グラファイトの接触
角が１４３度であるのに対して、その接触角が１８０度
に近い超撥水性を有し、これは水滴がほぼ完全な球体と
なることを意味し、したがって、その表面に付着しよう
とする水は、球体状の水滴となって表面を転がり、表面
に付着できずに脱落する。In the embodiments shown in FIGS. 1 to 5, the outer surface of the overhead electric wire 2 (FIGS. 1 and 2) and the surface of the metal tape 4 covering the outer surface of the overhead electric wire (FIGS. 3 and 4) And various line components 6A to 6A in an overhead power line.
The coating (coating) of the anatase-type super water-repellent titanium oxide 3 on the outer surface of G (FIG. 5) and the like is based on the contact angle between the surface of the fluororesin, which is the surface of the electric wire, and the water (the surface of the substance) in the aforementioned prior art (f) The smaller the angle is, the easier the water spreads and the larger the angle is, the more water is repelled and repelled by water droplets) of about 110 degrees. While the contact angle of graphite is 143 degrees, its contact angle is close to 180 degrees, which means that it has super-water repellency, meaning that the water droplets become almost perfect spheres, and therefore adhere to its surface. The water to be rolled on the surface as spherical water droplets falls off without being able to adhere to the surface.
【００１８】また、アナタース型超撥水性酸化チタン３
は、降雨時に汚染物質を分解除去する自己浄化（セルフ
クリーニング）作用を有し、前記超撥水性機能を長期に
わたって維持する。Also, anatase type super water repellent titanium oxide 3
Has a self-cleaning (self-cleaning) action of decomposing and removing pollutants during rainfall, and maintains the super-water-repellent function for a long time.
【００１９】[0019]
【発明の効果】この発明に係る着雪防止型架空電線およ
びその線路によれば次の通りの効果が得られる。架空電
線の外面またはその外面を覆った金属テープの表面およ
び各種線路構成部材の外面の、アナタース型超撥水性酸
化チタンのコーティングは、接触する水がほぼ完全な球
体状の水滴となる１８０度に近い接触角を有し、したが
ってその表面に付着せんとする水は、球体状の水滴とな
って転がり、表面に付着することができないものとな
る。それ故、架空電線や線路構成部材に降り注ぐ雪は、
単にそれらに接触するだけで地上に落下してゆき、架空
電線や線路構成部材に付着堆積することがない。According to the snow-prevention type overhead electric wire and its line according to the present invention, the following effects can be obtained. The anatase type super water-repellent titanium oxide coating on the outer surface of the overhead electric wire or the surface of the metal tape covering the outer surface and the outer surfaces of the various line components is used to make the contacting water 180 degrees at which almost completely spherical water droplets are formed. Water that has a close contact angle and thus adheres to its surface rolls as a spherical droplet and cannot adhere to the surface. Therefore, the snow that falls on overhead electric wires and track components is
Simply by contacting them, they fall to the ground and do not adhere to and accumulate on overhead electric wires or track components.
【００２０】また、上記アナタース型超撥水性酸化チタ
ンのコーティングは、セルフクリーニング作用を有する
ので、所期の機能（水をはじく性質）を長期にわたって
維持することができる。The anatase-type super-water-repellent titanium oxide coating has a self-cleaning effect, so that the desired function (water-repelling property) can be maintained for a long time.
【００２１】したがってこの発明によれば、従来の
（イ）乃至（ヘ）の技術に見られる前述の欠点を招くこ
となく、架空電線および線路構成部材に対する着雪を長
期にわたって効果的に防止することができる。Therefore, according to the present invention, it is possible to effectively prevent snow from accumulating on an overhead electric wire and a line constituent member for a long period of time without incurring the above-mentioned disadvantages found in the conventional techniques (a) to (f). Can be.
【００２２】また、請求項１および２に係る発明の第１
実施形態や請求項３に係る発明は、これを新設の線路に
おける架空電線や線路構成部材はもとより、既設線路に
おける架空電線や線路構成部材にも実施することができ
る。Further, the first aspect of the invention according to claims 1 and 2 is as follows.
In the embodiment and the invention according to claim 3, this can be applied not only to the overhead wires and the line components in the newly installed line, but also to the overhead wires and the line components in the existing line.
【図１】請求項１に係る着雪防止型架空電線の第１実施
形態を示す横断面図である。FIG. 1 is a cross-sectional view showing a first embodiment of a snow protection type overhead electric wire according to claim 1;
【図２】請求項１に係る着雪防止型架空電線の第２実施
形態を示す横断面図である。FIG. 2 is a cross-sectional view showing a second embodiment of the snow protection type overhead electric wire according to the first embodiment.
【図３】請求項２に係る着雪防止型架空電線の第１実施
形態を示す横断面図である。FIG. 3 is a cross-sectional view showing a first embodiment of a snow protection type overhead electric wire according to claim 2;
【図４】請求項２に係る着雪防止型架空電線の第２実施
形態を示す横断面図である。FIG. 4 is a cross-sectional view showing a second embodiment of a snow protection type overhead electric wire according to claim 2;
【図５】請求項３に係る着雪防止型架空電線路の一実施
形態を示す概略側面図である。FIG. 5 is a schematic side view showing an embodiment of a snow-prevention type overhead power line according to claim 3;
１ 裸金属線条 ２ 架空電線 ３ アナタース型超撥水性酸化チタン ４ 金属テープ ５ 鉄塔 ６（６Ａ〜６Ｇ） 線路構成部材 DESCRIPTION OF SYMBOLS 1 Bare metal wire 2 Overhead electric wire 3 Anatase type super water-repellent titanium oxide 4 Metal tape 5 Steel tower 6 (6A-6G) Line constituent member
Claims (3)
からなる架空電線（２）の外面に、アナタース型超撥水
性酸化チタン（３）がコーティングされていることを特
徴とする着雪防止型架空電線。An outer surface of an overhead electric wire (2) formed by twisting a plurality of bare metal wires (1) is coated with an anatase type super water-repellent titanium oxide (3). Snow prevention overhead wire.
からなる架空電線（２）の外面を覆った金属テープ
（４）に、アナタース型超撥水性酸化チタン（３）がコ
ーティングされていることを特徴とする着雪防止型架空
電線。2. An anatase type super water-repellent titanium oxide (3) is coated on a metal tape (4) covering an outer surface of an overhead electric wire (2) formed by twisting a plurality of bare metal wires (1). A snow protection type overhead electric wire, characterized in that:
架空電線（２）における各種線路構成部材（６）の外面
に、アナタース型超撥水性酸化チタン（３）がコーティ
ングされていることを特徴とする着雪防止型架空電線
路。3. An anatase type super water-repellent titanium oxide (3) is coated on the outer surface of various line components (6) of an overhead electric wire (2) installed between steel towers (5). A snow-prevention type overhead power line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11076362A JP2000268635A (en) | 1999-03-19 | 1999-03-19 | Snow accretion preventing type overhead electric wire and wire line thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11076362A JP2000268635A (en) | 1999-03-19 | 1999-03-19 | Snow accretion preventing type overhead electric wire and wire line thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000268635A true JP2000268635A (en) | 2000-09-29 |
Family
ID=13603256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11076362A Pending JP2000268635A (en) | 1999-03-19 | 1999-03-19 | Snow accretion preventing type overhead electric wire and wire line thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000268635A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006244727A (en) * | 2005-02-28 | 2006-09-14 | Central Res Inst Of Electric Power Ind | Electric power supply device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0335610U (en) * | 1989-08-15 | 1991-04-08 | ||
| JPH05221640A (en) * | 1992-02-17 | 1993-08-31 | Shin Etsu Chem Co Ltd | Production of hydrophobic titanium oxide fine particle |
| JPH06111630A (en) * | 1992-03-05 | 1994-04-22 | Fujikura Ltd | Snow-adhesion resistant overhead cable line |
| JPH07223815A (en) * | 1994-02-10 | 1995-08-22 | Canon Inc | Titanium oxide fine powder and hydrophobic titanium oxide fine powder |
-
1999
- 1999-03-19 JP JP11076362A patent/JP2000268635A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0335610U (en) * | 1989-08-15 | 1991-04-08 | ||
| JPH05221640A (en) * | 1992-02-17 | 1993-08-31 | Shin Etsu Chem Co Ltd | Production of hydrophobic titanium oxide fine particle |
| JPH06111630A (en) * | 1992-03-05 | 1994-04-22 | Fujikura Ltd | Snow-adhesion resistant overhead cable line |
| JPH07223815A (en) * | 1994-02-10 | 1995-08-22 | Canon Inc | Titanium oxide fine powder and hydrophobic titanium oxide fine powder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006244727A (en) * | 2005-02-28 | 2006-09-14 | Central Res Inst Of Electric Power Ind | Electric power supply device |
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