JPH06351122A - Tension increase prevention type wire drawing method - Google Patents
Tension increase prevention type wire drawing methodInfo
- Publication number
- JPH06351122A JPH06351122A JP12819291A JP12819291A JPH06351122A JP H06351122 A JPH06351122 A JP H06351122A JP 12819291 A JP12819291 A JP 12819291A JP 12819291 A JP12819291 A JP 12819291A JP H06351122 A JPH06351122 A JP H06351122A
- Authority
- JP
- Japan
- Prior art keywords
- tension
- increase
- support
- load
- adjusting means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005491 wire drawing Methods 0.000 title claims abstract description 19
- 230000002265 prevention Effects 0.000 title claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 238000004804 winding Methods 0.000 claims description 5
- 239000000725 suspension Substances 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000008602 contraction Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 241000510678 Falcaria vulgaris Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Landscapes
- Electric Cable Installation (AREA)
Abstract
(57)【要約】
【目的】支持具自体には何らの加工も施さずとも、大径
物の支持具通過に際しての張力上昇を有効に防止できる
張力上昇防止式の延線方法の提供を目的としている。
【構成】支持具１を鉄塔又は電柱のアームＡから吊り下
げる吊りコード２にバネ３（長さ調整手段）を介在さ
せ、大径物の通過に際して生じる張力上昇に応じて支持
具に掛かる荷重によりバネ３を伸ばすことにより、支持
具１の吊下げ長さＬを自動的に調整し、これにより張力
上昇の要因を解消するようにしている。
(57) [Abstract] [Purpose] An object of the present invention is to provide a tension increase preventing type wire drawing method capable of effectively preventing a tension increase when a large-diameter support tool passes through without supporting the support tool itself. I am trying. [Structure] A spring 3 (length adjusting means) is interposed between a suspension cord 2 for suspending a support tool 1 from an arm A of a steel tower or an electric pole, and a load is applied to the support tool in response to an increase in tension generated when a large diameter object passes. By extending the spring 3, the suspension length L of the support 1 is automatically adjusted, thereby eliminating the factor of increased tension.
Description
【０００１】[0001]
【産業上の利用分野】この発明は、鉄塔、電柱、とう道
の壁等の固定物に取り付けられた支持具にて中間を支持
しつつ線状体を延線する延線方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire-drawing method for extending a linear body while supporting an intermediate portion thereof with a support attached to a fixed object such as a steel tower, a telephone pole, or a wall of a winding road.
【０００２】[0002]
【従来の技術】例えば、架空線の延線を例にとると、通
常、金車と呼ばれる支持具を鉄塔より吊り下げ、この支
持具（金車）にて中間を支持しつつ線状体（電線、ワイ
ヤ等）を延線する延線方法がある。この延線方法の場合
には、線状体のつなぎ目等に取り付けられている例えば
ジョイントやプロテクターのような大径物が支持具を通
過するに際して張力が一時的に大きく上昇するという張
力上昇の問題があり、特に延線の高品質化が重要視され
て来ている昨今では、これの防止が大きな課題となって
来ている。2. Description of the Related Art For example, taking an overhead wire as an example, a supporting tool usually called a gold wheel is suspended from a steel tower, and a linear body ( Wire, wire, etc.). In the case of this wire-drawing method, a tension increase problem that a large tension temporarily increases when a large-diameter object such as a joint or protector attached to a joint between linear bodies passes through a support tool. In particular, in recent years, when the quality of wire drawing has been emphasized, prevention of this has become a major issue.
【０００３】このような課題に対しては古くより種々の
技術が提案されており、それらは、 ．複数の支持具を組み合わせて用いる技術；例えば、
実願昭４９−１１２０５５号、実願昭５４−１５１５７
０号、特願昭６２−２１５２２０号。 ．支持具自体の外周を大径物の通過に応じて変形させ
る技術；例えば、実願昭６０−１８６１７３号。 ．クローラ構造の支持具を用いる技術；例えば、実願
平１−８０３９０号、実開平２−９４４０８号。 ……のように分類できる。Various techniques have been proposed for a long time to solve such problems. Techniques using a combination of multiple supports;
Japanese Patent Application No. 49-112055, Japanese Patent Application No. 54-15157
No. 0, Japanese Patent Application No. 62-215220. ． A technique for deforming the outer periphery of the support itself according to the passage of a large-diameter object; for example, Japanese Utility Model Application No. 60-186173. ． Techniques using a crawler structure support tool; for example, Japanese Patent Application No. 1-80390 and Japanese Utility Model Application No. 2-94408. It can be classified as …….
【０００４】これらは、何れも、大径物を通過させる支
持具のガイド面の曲率の大小を張力上昇の要因として捉
えた考え方に基づいて、支持具自体に加工を施すもので
あるが、それぞれ少なからざる短所を持っている。すな
わち、複数の支持具を組み合わせる技術の場合には、支
持具の数が増えたり、重量が増大したり、したがってそ
の設置作業の負担増も避けられない。また、支持具自体
の外周を変形させる技術の場合には、支持具の構造が複
雑になり、故障原因が増加するし、大きなコストアップ
も避けられない。また、クローラ構造の支持具は、支持
具の曲率半径を大きくすることにより通過性を良くする
という思想に基づいており、通過性自体は改良されるも
のの、大径物の乗り入れに際して生じる一時的な張力上
昇そのものは避けられず、したがって、一時的な張力上
昇による最大張力を基準にした安全率に基づく設計が必
要になり、支持具の重量増大を避けられない。……等々
である。In all of these, the support tool itself is processed on the basis of the idea that the magnitude of the curvature of the guide surface of the support tool that allows a large-diameter object to pass through is taken as a factor for increasing the tension. Has a number of disadvantages. That is, in the case of the technique of combining a plurality of support tools, the number of support tools is increased, the weight is increased, and thus the burden of installation work is inevitably increased. Further, in the case of the technique of deforming the outer periphery of the support tool itself, the structure of the support tool becomes complicated, the cause of failure increases, and a large cost increase is inevitable. Further, the support of the crawler structure is based on the idea of improving the passability by increasing the radius of curvature of the support, and although the passability itself is improved, it is a temporary phenomenon that occurs when a large-diameter object is loaded. The increase in tension itself is unavoidable. Therefore, the design based on the safety factor based on the maximum tension due to the temporary increase in tension is required, and the weight increase of the support tool cannot be avoided. ... and so on.
【０００５】[0005]
【発明が解決しようとする課題】ところで、新しいタイ
プの延線機器を開発した場合には、一般に、先ず工場試
験を行い、次いで、現場試験を行い、これらで満足な結
果が得られて初めて製品化される、というステップを踏
むが、支持具についての工場試験の場合には現場試験や
実際の延線作業の場合に較べ、延線する線状体の長さが
格段に短いために大径物の通過による張力上昇が極端に
大きく、このため試験用の延線車に過大な負荷がかかる
等のトラブルが絶えなかった。そこで、この極端に大き
い張力上昇を抑えようと、工場試験に際して思いつくま
まのアイデアを試行錯誤的に試みたところ、支持具の吊
り下げに用いる吊りコードにバネを介在させてクッショ
ン性を与えるという方法が極めて有効に張力上昇を抑え
てくれることを見出した。When a new type of wire drawing equipment is developed, generally, a factory test is first performed, and then a field test is performed. However, in the case of the factory test for the support, the length of the wire to be drawn is much shorter than in the case of the field test or the actual wire drawing work. The increase in tension due to the passage of an object was extremely large, and as a result, troubles such as an excessive load being applied to the rolling stock for testing were incessant. Therefore, in order to suppress this extremely large increase in tension, we tried trial and error on the idea that we had come up with in the factory test. Found that it effectively suppresses the increase in tension.
【０００６】この現象の発見により、新たな視点で張力
上昇の要因を分析したところ、以下のような知見が得ら
れた。すなわち、大径物が支持具Ｓを通過する場合に
は、図５に示すような現象、つまり大径物Ｂの前後で線
状体Ｗが大径物Ｂによりテント状に張り上げられ、この
張上げにより生じる線状体Ｗの長さの“伸び”（Ｌ1 −
Ｌ2 ）（Ｌ1 はａ→ｂ→ｃの経路で通常の状態の線状体
の長さ、Ｌ2 はａ→ｘ→ｙ→ｃの経路で大径物Ｂにより
張り上げられた状態の線状体の長さ）が張力上昇の大き
な要因であり、前記のバネを用いた試みが、たまたまこ
の“伸び”をうまく相殺し、張力上昇が抑えられた……
という知見である。この発明はこのような知見に基づい
てなされたもので、支持具自体には何らの加工も施さず
とも、大径物の支持具通過に際しての張力上昇を有効に
防止できる張力上昇防止式の延線方法の提供を目的とし
ている。[0006] By discovering this phenomenon, when the factors of the increase in tension were analyzed from a new viewpoint, the following findings were obtained. That is, when the large-diameter object passes through the support S, the phenomenon as shown in FIG. 5, that is, the linear body W is pulled up by the large-diameter object B in a tent shape before and after the large-diameter object B, and this pulling up is performed. “Elongation” of the length of the linear body W (L 1 −
L 2 ) (L 1 is the length of the linear body in a normal state on the route of a → b → c, L 2 is the line stretched by the large-diameter object B on the route of a → x → y → c The length of the strip is a major factor of the increase in tension, and the attempt to use the spring just happened to successfully offset the "stretch" of this, and the increase in tension was suppressed.
That is the knowledge. The present invention has been made on the basis of such knowledge, and a tension increase preventing type extension capable of effectively preventing a tension increase when a large-diameter object passes through a support instrument without performing any processing on the support instrument itself. The purpose is to provide a line method.
【０００７】[0007]
【課題を解決するための手段】具体的には、この発明に
よる張力上昇防止式の延線方法は、長さ調整手段を介し
て支持具を固定物に取り付け、大径物の支持具通過に際
して生じる張力上昇に応じて掛かる荷重により長さ調整
手段を作動させることにより支持具の取付け長さを自動
的に調整するようにしている。Specifically, in the wire extension method of the tension increase preventing type according to the present invention, a support tool is attached to a fixed object through a length adjusting means, and when passing a support tool of a large diameter. The mounting length of the support is automatically adjusted by actuating the length adjusting means by the load applied according to the increase in the generated tension.
【０００８】長さ調整手段としてはバネを用いることが
できる。また、長さ調整手段として定荷重バネ、すなわ
ち伸びが増大しても荷重が変わらないようなバネを用い
るとより有効に張力上昇を抑制できる。すなわち、一般
のバネは伸びるにしたがって荷重が増大し、この荷重増
大分が張力上昇を僅かに残す原因になるが、定荷重バネ
の場合にはバネの伸びが増大しても荷重が変わらないの
で通常のバネの場合より確実に張力上昇を抑制できる。A spring can be used as the length adjusting means. Further, if a constant load spring, that is, a spring whose load does not change even if the elongation increases, is used as the length adjusting means, the tension increase can be suppressed more effectively. That is, the load of a general spring increases as it expands, and this increase in load causes a slight increase in tension, but in the case of a constant-load spring, the load does not change even if the expansion of the spring increases. The increase in tension can be suppressed more reliably than in the case of a normal spring.
【０００９】さらに、線状体に掛かる張力に対応して支
持具に掛かる荷重を検出する荷重検出手段及び、荷重検
出手段からの信号に基づいて伸縮する伸縮手段よりなる
長さ調整手段を用いるようにすれば、バネのような抵抗
や不安定性がないので、より一層安定した状態で張力上
昇をより有効に抑制できる。Further, the length adjusting means including the load detecting means for detecting the load applied to the support corresponding to the tension applied to the linear body and the expanding / contracting means for expanding / contracting based on the signal from the load detecting means is used. By doing so, since there is no resistance or instability like a spring, the tension increase can be suppressed more effectively in a more stable state.
【００１０】[0010]
【実施例】以下、この発明の実施例を説明する。この実
施例は、架空線の延線に関する延線方法の例で、図２に
示すように、延線区間中にある鉄塔又は電柱Ｔ、Ｔ、…
…よりホイール形の支持具１、１、……を吊り下げ、こ
の支持具１、１、……にて支持させつつ、ドラム場Ｄか
らエンジン場Ｅに向けて線状体Ｗを延線するものであ
る。Embodiments of the present invention will be described below. This embodiment is an example of a wire drawing method relating to the wire extension of an overhead wire, and as shown in FIG. 2, a tower or telephone poles T, T, ...
.. is suspended from the wheel-shaped support tools 1, and the linear bodies W are extended from the drum field D toward the engine field E while being supported by the support tools 1, 1 ,. It is a thing.
【００１１】各支持具１は、吊りコード２により鉄塔又
は電柱ＴのアームＡより吊り下げられるものであるが、
この例では、図１に示すように、バネ３が「長さ調整手
段」として吊りコード２の途中に介在させらている。そ
して、一定以上の荷重が支持具１に掛かると、その荷重
に応じてバネ３が伸びることにより、吊下げ長さＬが自
動的に調整され、これにより前述した張力上昇の要因と
なる線状体Ｗの長さの“伸び”が相殺され、大径物の通
過による張力上昇が抑制されるようになっている。Each support 1 is hung from a steel tower or an arm A of a utility pole T by a suspension cord 2,
In this example, as shown in FIG. 1, the spring 3 is interposed in the middle of the suspension cord 2 as “length adjusting means”. Then, when a load of a certain amount or more is applied to the support tool 1, the suspension length L is automatically adjusted by the spring 3 extending in accordance with the load, and thus the linear shape that causes the above-described tension increase. The "extension" of the length of the body W is offset, and the increase in tension due to the passage of a large-diameter object is suppressed.
【００１２】バネ３としては通常のバネを用いることも
できるが、伸びが増大しても荷重が変わらないような定
荷重バネを用いるようにすればより好ましい。このよう
な定荷重バネとしては、例えば、薄い長尺の板バネをコ
イル状に巻き込んだもので、一定の荷重により巻き出し
・巻き戻しがなされることによりバネ力を得られる構造
のものが好ましい。As the spring 3, a normal spring can be used, but it is more preferable to use a constant load spring that does not change the load even if the elongation increases. As such a constant-load spring, for example, a thin long leaf spring is wound in a coil shape, and a structure in which a spring force is obtained by unwinding and rewinding with a constant load is preferable. .
【００１３】図３に示すのは、地中に掘られたとう道内
に線状体Ｗを布設する延線方法に関する例である。すな
わち、この延線方法では、とう道Ｎの曲がり部分にクロ
ーラ構造の支持具１０を設け、この支持具１０にて支持
させつつ線状体Ｗを布設するもので、支持具１０をとう
道Ｎの壁に取り付けているワイヤ１１の途中にバネ３が
介在させらている。このように、クローラ構造の支持具
１０と本発明による延線方法とを組み合わせることによ
り、よりよい通過性が得られ、しかも一時的な張力を避
けられるので、設計基準の最大張力が小さくて済み、支
持具をより軽量化できる。FIG. 3 shows an example of a wire-drawing method for laying a linear body W in a winding path dug in the ground. That is, in this wire drawing method, a supporter 10 having a crawler structure is provided at a curved portion of the winding path N, and the linear body W is laid while being supported by the supporter 10. The spring 3 is interposed in the middle of the wire 11 attached to the wall of the. As described above, by combining the support 10 having the crawler structure and the wire drawing method according to the present invention, better passage properties can be obtained, and temporary tension can be avoided. Therefore, the maximum tension of the design standard can be small. The weight of the support can be reduced.
【００１４】図４に示すのは、「長さ調整手段」の他の
例で、この「長さ調整手段」は、線状体Ｗに掛かる張力
に対応して支持具１に掛かる荷重を検出する荷重検出手
段５及び、例えば油圧シリンダのような伸縮手段６より
形成されており、荷重検出手段５からの荷重信号に基づ
いて伸縮手段６が伸縮することにより吊下げ長さＬが自
動的に調整されるようになっている。すなわち、大径物
の乗り入れにより張力が一時的に上昇し始めると同時
に、これが荷重検出手段５を介して伸縮手段６にフィー
ドバックされ、即座にこの張力上昇が解消されるもので
ある。FIG. 4 shows another example of the "length adjusting means". This "length adjusting means" detects the load applied to the support 1 in correspondence with the tension applied to the linear body W. The load detecting means 5 and the expanding / contracting means 6 such as a hydraulic cylinder, for example, expand / contract the expanding / contracting means 6 based on the load signal from the load detecting means 5 to automatically adjust the suspension length L. It is supposed to be adjusted. That is, the tension starts to temporarily increase due to the entry of a large-diameter object, and at the same time, the tension is fed back to the expansion / contraction means 6 via the load detection means 5 and this increase in tension is immediately canceled.
【００１５】[0015]
【発明の効果】以上説明したように、この発明による張
力上昇防止式の延線方法は、長さ調整手段にて支持具の
吊下げ長さを自動的に調整することにより大径物の支持
具通過に際して生じる張力上昇の要因を解消するように
しているので、特別の加工を施した支持具を用いる必要
がないし、また、大径物の通過による張力上昇を見込ん
だ設計が必要でなくなり、支持具をより軽量化でき、延
線作業のより一層の合理化に寄与できる。As described above, according to the wire extension method of the tension increase preventing type according to the present invention, a large-diameter object can be supported by automatically adjusting the hanging length of the support by the length adjusting means. Since the factor of the increase in tension that occurs when the tool passes is eliminated, it is not necessary to use a specially processed support tool, and there is no need for a design that allows for the increase in tension due to the passage of large diameter objects. The support tool can be made lighter in weight, which can contribute to further streamlining of the wire drawing work.
【００１６】[0016]
【図１】バネによる長さ調整手段を介して支持具を取り
付けた状態の側面図である。FIG. 1 is a side view showing a state in which a support is attached via a length adjusting means by a spring.
【図２】架空線の延線に関しこの発明による延線方法を
用いた延線作業の説明図である。FIG. 2 is an explanatory view of a wire drawing work using a wire drawing method according to the present invention for drawing an overhead wire.
【図３】とう道内への線状体布設に関しこの発明による
延線方法を用いた延線作業の説明図である。FIG. 3 is an explanatory view of a wire-drawing operation using a wire-drawing method according to the present invention for laying a linear body in a winding road.
【図４】他の例による長さ調整手段により支持具を鉄塔
に吊り下げた状態の側面図である。FIG. 4 is a side view showing a state in which a support tool is suspended from a steel tower by a length adjusting means according to another example.
【図５】大径物の通過により線状体が張り上げられる状
態を示す説明図である。FIG. 5 is an explanatory diagram showing a state in which a linear body is pulled up by passing a large-diameter object.
１ 支持具 ３ バネ ５ 荷重検出手段 ６ 伸縮手段 DESCRIPTION OF SYMBOLS 1 Support tool 3 Spring 5 Load detection means 6 Expansion / contraction means
Claims (4)
り付けられた支持具にて中間を支持しつつ線状体を延線
する延線方法において、 長さ調整手段を介して支持具を固定物に取り付け、大径
物の支持具通過に際して生じる張力上昇に応じて掛かる
荷重により長さ調整手段を作動させることにより支持具
の取付け長さを自動的に調整するようにしたことを特徴
とする張力上昇防止式の延線方法。1. A wire drawing method for extending a linear body while supporting an intermediate portion by a supporting tool attached to a fixed object such as a steel tower, a telephone pole, and a wall of a winding road, and supporting the same through a length adjusting means. The tool is attached to a fixed object, and the length of the support is automatically adjusted by actuating the length adjusting means by the load applied according to the increase in tension generated when passing the support of large diameter. Characteristic wire extension method to prevent tension increase.
１の張力上昇防止式の延線方法。2. The tension increase preventing type wire drawing method according to claim 1, wherein a spring is used as the length adjusting means.
請求項１の張力上昇防止式の延線方法。3. The tension increasing prevention type wire drawing method according to claim 1, wherein a constant load spring is used as the length adjusting means.
掛かる荷重を検出する荷重検出手段及び、荷重検出手段
からの信号に基づいて伸縮する伸縮手段よりなる長さ調
整手段を用いる請求項１の張力上昇防止式の延線方法。4. A length adjusting means comprising a load detecting means for detecting a load applied to the support corresponding to a tension applied to the linear body and an expanding / contracting means for expanding / contracting based on a signal from the load detecting means. Item 1. A method for extending tension-preventing wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12819291A JPH06351122A (en) | 1991-05-02 | 1991-05-02 | Tension increase prevention type wire drawing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12819291A JPH06351122A (en) | 1991-05-02 | 1991-05-02 | Tension increase prevention type wire drawing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06351122A true JPH06351122A (en) | 1994-12-22 |
Family
ID=14978732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12819291A Pending JPH06351122A (en) | 1991-05-02 | 1991-05-02 | Tension increase prevention type wire drawing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06351122A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20210156614A (en) * | 2020-06-18 | 2021-12-27 | 한국전력공사 | Transmission line cabling system and transmission line cabling method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56125912A (en) * | 1980-03-07 | 1981-10-02 | Kanto Denki Koji | Extended wire tension monitor for wire |
| JPS5953766A (en) * | 1982-09-13 | 1984-03-28 | 有限会社織竹 | Dyeing of yarn with high heat shrinkability |
| JPS60147789A (en) * | 1984-01-12 | 1985-08-03 | キヤノン株式会社 | electrochromic display device |
| JPS60186173A (en) * | 1984-03-06 | 1985-09-21 | Fuji Photo Film Co Ltd | Electronic still camera |
| JPS6145866A (en) * | 1984-07-31 | 1986-03-05 | Furukawa Electric Co Ltd:The | Tension control method for long materials in accumulator |
| JPS6460209A (en) * | 1987-08-31 | 1989-03-07 | Yasuda Seisakusho | Method of passing protector through metal wheel and metal wheel used therefor |
| JPH0235853U (en) * | 1988-08-31 | 1990-03-08 |
-
1991
- 1991-05-02 JP JP12819291A patent/JPH06351122A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56125912A (en) * | 1980-03-07 | 1981-10-02 | Kanto Denki Koji | Extended wire tension monitor for wire |
| JPS5953766A (en) * | 1982-09-13 | 1984-03-28 | 有限会社織竹 | Dyeing of yarn with high heat shrinkability |
| JPS60147789A (en) * | 1984-01-12 | 1985-08-03 | キヤノン株式会社 | electrochromic display device |
| JPS60186173A (en) * | 1984-03-06 | 1985-09-21 | Fuji Photo Film Co Ltd | Electronic still camera |
| JPS6145866A (en) * | 1984-07-31 | 1986-03-05 | Furukawa Electric Co Ltd:The | Tension control method for long materials in accumulator |
| JPS6460209A (en) * | 1987-08-31 | 1989-03-07 | Yasuda Seisakusho | Method of passing protector through metal wheel and metal wheel used therefor |
| JPH0235853U (en) * | 1988-08-31 | 1990-03-08 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20210156614A (en) * | 2020-06-18 | 2021-12-27 | 한국전력공사 | Transmission line cabling system and transmission line cabling method |
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