JPS5822928B2 - How to prevent gearoping in self-supporting cables - Google Patents
How to prevent gearoping in self-supporting cablesInfo
- Publication number
- JPS5822928B2 JPS5822928B2 JP51085797A JP8579776A JPS5822928B2 JP S5822928 B2 JPS5822928 B2 JP S5822928B2 JP 51085797 A JP51085797 A JP 51085797A JP 8579776 A JP8579776 A JP 8579776A JP S5822928 B2 JPS5822928 B2 JP S5822928B2
- Authority
- JP
- Japan
- Prior art keywords
- self
- cable
- supporting
- wire
- prevent
- 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.)
- Expired
Links
Landscapes
- Suspension Of Electric Lines Or Cables (AREA)
Description
【発明の詳細な説明】
本発明は自己支持型ケーブルのギヤロッピング（非円形
ケーブルに横から風を受けると揚力が働いてなわとびの
ような振動をする現象）を防止する方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for preventing gear roping (a phenomenon in which when a non-circular cable receives wind from the side, a lifting force acts on the cable and causes it to vibrate like a jump rope) in a self-supporting cable.
第１図Ａに示す自己支持型漏洩同軸ケーブルの如き自己
支持型ケーブル１においては、横から風を受けると第１
図Ｂに示すようにメツセンジャワイヤ一部１Ａよりケー
ブル本体部１Ｂの方が大きく吹き流されて揚力を受け、
電柱等の支持部を振動の節とし支持部間の中央を振動の
腹としてなわとびのような振動が生じ、支持部で自己支
持型ケーブルが切断され易くなる欠点があった。In a self-supporting cable 1 such as the self-supporting leaky coaxial cable shown in FIG.
As shown in Figure B, the cable main body 1B is more blown away than the cable main body 1A and receives a lifting force.
This has the drawback that a jump-rope-like vibration occurs with the supporting parts such as utility poles as nodes of vibration and the center between the supporting parts as an antinode of vibration, making it easy for the self-supporting cable to break at the supporting parts.
現在のところ、このようなギヤロッピングを防止するた
めの矯正な方法が確立されていない。At present, no corrective method has been established to prevent such gearloping.
本発明の目的は、ギヤロッピングを簡単に防止できる自
己支持型ケーブルのギヤロッピング防止方法を提供する
にある。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for preventing gear lopping of a self-supporting cable, which can easily prevent gear lopping.
以下本発明の方法の一例を第２図を参照して詳細に説明
する。An example of the method of the present invention will be explained in detail below with reference to FIG.
自己支持型ケーブル１はそのメツセンジャワイヤ一部１
Ａに張力をかけて各支柱２間に順次張設する。The self-supporting cable 1 has a portion of its cable wire 1
Apply tension to A and sequentially install it between each support 2.
なお、３はメツセンジャワイヤ一部１Ａを各支柱２に支
持させている支持部である。Incidentally, reference numeral 3 denotes a support portion that supports each of the pillars 2 to support a portion of the messenger wire 1A.
また各支柱２間には低張力で補助ワイヤー４を張設する
。Further, an auxiliary wire 4 is stretched between each support 2 with low tension.
５は補助ワイヤー４を各支柱２に支持させている支持部
である。Reference numeral 5 denotes a support portion for supporting the auxiliary wire 4 on each pillar 2.
補助ワイヤー４は所定の間隔でクランプ具６により自己
支持型ケーブル１のメツセンジャワイヤ一部１Ａにクラ
ンプする。The auxiliary wire 4 is clamped to the messenger wire portion 1A of the self-supporting cable 1 by a clamping tool 6 at predetermined intervals.
このようにすると、横から風を受けた場合には、第３図
及び第４図に示すように補助ワイヤー４がメツセンジャ
ワイヤ一部１Ａより風下の方に押し出され、補助ワイヤ
ー４には時計方向のモーメントが作用する。In this way, when the wind blows from the side, the auxiliary wire 4 is pushed to the leeward side of the messenger wire part 1A as shown in FIGS. 3 and 4, and the auxiliary wire 4 is A directional moment acts.
一方、ケーブル本体部１Ｂには風圧により第４図で反時
計方向のモーメントが作用する。On the other hand, a counterclockwise moment in FIG. 4 acts on the cable main body 1B due to wind pressure.
従って、ケーブル本体部１Ｂに作用する反時計方向のモ
ーメントは補助ワイヤー４に作用する時計方向のモーメ
ントでほぼ相殺され、自己支持型ケーブルのギヤロッピ
ングを防止する。Therefore, the counterclockwise moment acting on the cable body 1B is substantially canceled out by the clockwise moment acting on the auxiliary wire 4, thereby preventing gear roping of the self-supporting cable.
以上説明したように本発明によれば、単に自己支持型ケ
ーブルの上に低張力で補助ワイヤーを張り、この補助ワ
イヤーを所定の間隔でメツセンジャワイヤ一部にクラン
プ具でクランプするだけで、自己支持型ケーブルのギヤ
ロッピングを防止できる。As explained above, according to the present invention, the auxiliary wire is simply stretched over the self-supporting cable with low tension, and the auxiliary wire is clamped at a predetermined interval to a part of the messenger wire using a clamping tool. Prevents gearropping of supported cables.
従って、自己支持型ケーブルの切断事故を防止すること
ができる。Therefore, it is possible to prevent an accident of cutting the self-supporting cable.
第１図Ａは自己支持型ケーブルの断面図、第１図Ｂは自
己支持型ケーブルのギヤロッピング原因の説明図、第２
図は本発明のギヤロッピング防止方法を実施している自
己支持型ケーブルの布設状態の説明図、第３図及び第４
図は第２図に示すケーブルに風が作用した状態の説明図
である。
１・・・自己支持型ケーブル、１Ａ・・・メツセンジャ
ワイヤ一部、１Ｂ・・・ケーブル本体部、２・・・支柱
、３・・・支持部、４・・・補助ワイヤー、５・・・支
持部、６・・・クランプ具。Figure 1A is a cross-sectional view of a self-supporting cable, Figure 1B is an explanatory diagram of the cause of gearropping in a self-supporting cable, and Figure 2
Figures 3 and 4 are explanatory diagrams of the installation state of self-supporting cables implementing the gearropping prevention method of the present invention.
The figure is an explanatory diagram of a state in which wind acts on the cable shown in FIG. 2. DESCRIPTION OF SYMBOLS 1...Self-supporting cable, 1A...Metsusenja wire part, 1B...Cable body part, 2...Strut, 3...Support part, 4...Auxiliary wire, 5... - Support part, 6...clamp tool.
Claims (1)
いる自己支持型ケーブルの上に低張力で補助ワイヤーを
張り、前記補助ワイヤーを複数個のクランプ具で長さ方
向に適当な間隔で前記メツセンジャワイヤ一部にクラン
プしたことを特徴とする自己支持型ケーブルのギヤロッ
ピング防止方法。1. An auxiliary wire is stretched with low tension over a self-supporting cable that is stretched with tension applied to a part of the messenger wire, and the auxiliary wire is clamped at appropriate intervals in the length direction using a plurality of clamps. A method for preventing gear roping of a self-supporting cable, characterized by clamping a part of the wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51085797A JPS5822928B2 (en) | 1976-07-19 | 1976-07-19 | How to prevent gearoping in self-supporting cables |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51085797A JPS5822928B2 (en) | 1976-07-19 | 1976-07-19 | How to prevent gearoping in self-supporting cables |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5310894A JPS5310894A (en) | 1978-01-31 |
| JPS5822928B2 true JPS5822928B2 (en) | 1983-05-12 |
Family
ID=13868865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP51085797A Expired JPS5822928B2 (en) | 1976-07-19 | 1976-07-19 | How to prevent gearoping in self-supporting cables |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5822928B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04135897U (en) * | 1991-06-12 | 1992-12-17 | スターボード株式会社 | wet suit |
-
1976
- 1976-07-19 JP JP51085797A patent/JPS5822928B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04135897U (en) * | 1991-06-12 | 1992-12-17 | スターボード株式会社 | wet suit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5310894A (en) | 1978-01-31 |
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