JPS6042562B2 - steel core aluminum stranded wire - Google Patents
steel core aluminum stranded wireInfo
- Publication number
- JPS6042562B2 JPS6042562B2 JP5640478A JP5640478A JPS6042562B2 JP S6042562 B2 JPS6042562 B2 JP S6042562B2 JP 5640478 A JP5640478 A JP 5640478A JP 5640478 A JP5640478 A JP 5640478A JP S6042562 B2 JPS6042562 B2 JP S6042562B2
- Authority
- JP
- Japan
- Prior art keywords
- stranded wire
- steel
- aluminum stranded
- aluminum
- core
- 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
- Wire Processing (AREA)
- Non-Insulated Conductors (AREA)
Description
【発明の詳細な説明】 本発明は鋼芯アルミ撚線の改良に関するものである。[Detailed description of the invention] The present invention relates to improvements in steel core aluminum stranded wire.
通常、鋼芯アルミ撚線は、所望数の鋼素線を撚合せた鋼
撚線を芯線とし、この芯線上にアルミ線を密着して撚合
せてなる。Usually, steel-core aluminum stranded wire is made by using a steel stranded wire made by twisting a desired number of steel wires as a core wire, and then twisting aluminum wires tightly onto this core wire.
この種鋼芯アルミ撚線は、各素線間に溝が形成されてい
るから、鋼撚線の芯線とアルミ撚線層との間での摩擦抵
抗が大きくなつている。In this type of steel-core aluminum stranded wire, grooves are formed between each strand, so the frictional resistance between the core wire of the steel stranded wire and the aluminum stranded wire layer is increased.
従つて、この鋼芯アルミ撚線の線膨張係数は、略鋼撚線
とアルミ撚線との中間的な値となる。Therefore, the coefficient of linear expansion of this steel-core aluminum stranded wire is approximately an intermediate value between that of the steel stranded wire and the aluminum stranded wire.
そのため、地変増加は鋼撚線のみの地度増加以上の値と
なつてしまう。このような問題点を解決した鋼芯アルミ
撚線として、鋼芯線とアルミ撚線層との間にアルミより
も硬質の金属テープを介在させたものがある（実開昭５
１−１２９７７８号公報）。Therefore, the increase in ground deformation is greater than the increase in ground deformation for steel stranded wire alone. As a steel-core aluminum stranded wire that solves these problems, there is one in which a metal tape, which is harder than aluminum, is interposed between the steel core wire and the aluminum stranded wire layer.
1-129778).
このような構造の鋼芯アルミ撚線はアルミ撚線が硬質の
金属テープ上を滑るため銅芯線に張力をかけて緊線する
ことができ、温度上昇に伴なう伸びを従来の鋼芯アルミ
撚線に比し、著しく小さくすることができる。しかし、
銅芯線とアルミ撚線との間にアルミよりも硬質の金属テ
ープを介在させなければならないので、高価となると共
に金属テープにしわが生じたり金属テープが鋼芯線間の
溝に落ち込むと金属テープの表面が平滑にならず、アル
ミ撚線の滑りが悪くなるという問題がある。本発明は、
このような欠点を改良し、アルミ撚線の滑りを確実に生
じせ、地変増加を鋼撚線の線膨張のみによつて決定する
ことができると共に安価である低地度の鋼芯アルミ撚線
を提供するものである。Steel-core aluminum stranded wire with this structure can be tightened by applying tension to the copper core wire because the aluminum strands slide on a hard metal tape, and the elongation due to temperature rise can be reduced compared to conventional steel-core aluminum strands. It can be made significantly smaller than twisted wires. but,
Since a metal tape that is harder than aluminum must be interposed between the copper core wire and the aluminum stranded wire, it is expensive, and if the metal tape wrinkles or falls into the groove between the steel core wires, the surface of the metal tape may be damaged. There is a problem in that the aluminum strands are not smooth and the aluminum strands have difficulty sliding. The present invention
To improve these shortcomings, we have developed a low-grade steel-core aluminum stranded wire that can reliably cause slippage in the aluminum stranded wire, increase the ground displacement only by the linear expansion of the steel stranded wire, and is inexpensive. This is what we provide.
これを図に示す一実施例に基づき説明する。This will be explained based on an example shown in the figure.
図において１は通常の鋼素線又はアッパー、エリンバー
の如き低線膨張係数の鋼素線を撚合せた鋼撚線、２は該
鋼撚線１上に撚合せたアルミ撚線−層を示す。鋼撚線１
は、図に示すように外周面が平滑となつている。In the figure, 1 indicates an ordinary steel wire or upper, a steel stranded wire made by twisting steel wires with a low coefficient of linear expansion such as Elinvar, and 2 indicates an aluminum stranded wire layer twisted on the steel stranded wire 1. . Steel stranded wire 1
As shown in the figure, the outer peripheral surface is smooth.
この平滑とする手段としては、予め鋼素線３を図示する
如く、略扇型の梯型状に形成し、これをノ通常の撚合せ
手段によつて外形丸型に形成してもよい。As a means for smoothing the steel wire 3, it is possible to form the steel wire 3 in advance into a substantially fan-like ladder shape, as shown in the figure, and to form it into a round outer shape by means of ordinary twisting means.
この場合には中心部に空洞が形成されるので、該空洞内
に光ケーブル等光ガイドを収納することが可能である。
また他の手段としては又通常の丸型素線を撚合せてなる
鋼撚線を圧縮ダイス、フローラ−などによつて圧縮成型
して、その外周面を平滑に仕上げてもよい。しかして本
発明鋼芯アルミ撚線によれば、鋼撚線１の外周面が平滑
となつているから、鋼撚線１とアルミ撚線層２との間の
摩擦抵抗が少く、両者は滑り易くなつている。In this case, since a cavity is formed in the center, it is possible to house an optical guide such as an optical cable in the cavity.
As another method, a steel stranded wire made by twisting ordinary round wires may be compressed and molded using a compression die, a flow roller, etc., and the outer peripheral surface thereof may be finished smooth. However, according to the steel-core aluminum stranded wire of the present invention, since the outer circumferential surface of the steel stranded wire 1 is smooth, the frictional resistance between the steel stranded wire 1 and the aluminum stranded wire layer 2 is small, and both slip. It's getting easier.
従つて、本発明鋼芯アルミ撚線によれば、この鋼芯アル
ミ撚線が膨張した際には、鋼撚線とアルミ撚線層との間
の摩擦抵抗が少いので、アルミ撚線層はスムーズに伸長
し、やがて径間内における張力は鋼撚線のみが負担し、
もつてその径間内の弛度増加は銅撚線のみの線膨張係数
によつて決定され、所期の目的を達し得る。Therefore, according to the steel-core aluminum stranded wire of the present invention, when the steel-core aluminum stranded wire expands, the frictional resistance between the steel stranded wire and the aluminum stranded wire layer is small, so that the aluminum stranded wire layer The wires extend smoothly, and soon the tension within the span is borne only by the steel strands.
The increase in slack within the span is determined by the coefficient of linear expansion of the copper strands alone, and the desired purpose can be achieved.
また本発明は鋼撚線の外周面を直接平滑とし、従来のよ
うにテープを介在させる構造でないので、従来のものに
比し安価であると共にアルミ撚線の滑りを確実に生じさ
せるとができる利点がある。In addition, the present invention has a structure in which the outer circumferential surface of the steel stranded wire is directly smoothed, and there is no tape intervening as in the conventional structure, so it is less expensive than the conventional one, and it is possible to ensure that the aluminum stranded wire does not slip. There are advantages.
図は本発明鋼芯アルミ撚線の一実施例を示す断面図であ
る。
１・・・・・・鋼撚線、２・・・・・・アルミ撚線層、
３・・・・・・鋼素線。The figure is a sectional view showing one embodiment of the steel core aluminum stranded wire of the present invention. 1... Steel stranded wire, 2... Aluminum stranded wire layer,
3... Steel wire.
Claims (1)
において、前記鋼撚線の外周面は平滑になつていること
を特徴とする鋼芯アルミ撚線。1. A steel-core aluminum stranded wire made by twisting an aluminum wire onto a steel strand, characterized in that the outer peripheral surface of the steel strand is smooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5640478A JPS6042562B2 (en) | 1978-05-12 | 1978-05-12 | steel core aluminum stranded wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5640478A JPS6042562B2 (en) | 1978-05-12 | 1978-05-12 | steel core aluminum stranded wire |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8242684A Division JPS6068125A (en) | 1984-04-24 | 1984-04-24 | Twisted steel wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54148283A JPS54148283A (en) | 1979-11-20 |
| JPS6042562B2 true JPS6042562B2 (en) | 1985-09-24 |
Family
ID=13026230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5640478A Expired JPS6042562B2 (en) | 1978-05-12 | 1978-05-12 | steel core aluminum stranded wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6042562B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58134814U (en) * | 1982-03-05 | 1983-09-10 | 古河電気工業株式会社 | composite overhead wire |
| JPS5933624U (en) * | 1982-08-28 | 1984-03-01 | 古河電気工業株式会社 | steel stranded wire |
-
1978
- 1978-05-12 JP JP5640478A patent/JPS6042562B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54148283A (en) | 1979-11-20 |
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