JPH0440265A - Pre-corrosion prevention for parallel strand cable - Google Patents
Pre-corrosion prevention for parallel strand cableInfo
- Publication number
- JPH0440265A JPH0440265A JP14901990A JP14901990A JPH0440265A JP H0440265 A JPH0440265 A JP H0440265A JP 14901990 A JP14901990 A JP 14901990A JP 14901990 A JP14901990 A JP 14901990A JP H0440265 A JPH0440265 A JP H0440265A
- Authority
- JP
- Japan
- Prior art keywords
- steel wire
- resin
- steel wires
- steel
- coating
- 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
- 238000005536 corrosion prevention Methods 0.000 title claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 59
- 239000010959 steel Substances 0.000 claims abstract description 59
- 229920005989 resin Polymers 0.000 claims abstract description 31
- 239000011347 resin Substances 0.000 claims abstract description 31
- 238000000576 coating method Methods 0.000 claims abstract description 22
- 239000011248 coating agent Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 10
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 229920001903 high density polyethylene Polymers 0.000 abstract description 4
- 239000004700 high-density polyethylene Substances 0.000 abstract description 4
- 238000001125 extrusion Methods 0.000 abstract description 2
- 239000004744 fabric Substances 0.000 abstract description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract 1
- 239000011701 zinc Substances 0.000 abstract 1
- 229910052725 zinc Inorganic materials 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910001335 Galvanized steel Inorganic materials 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 239000008397 galvanized steel Substances 0.000 description 4
- 230000003449 preventive effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、吊橋、斜張橋等に用いられる平行線ストラン
ドケーブルのプレ防食方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pre-corrosion protection method for parallel strand cables used in suspension bridges, cable-stayed bridges, etc.
（従来の技術）
鋼線又は鋼線束を平行に集束してなる平行線ストランド
ケーブルは、その内部、すなわち、鋼線間又は鋼線束間
の空隙があれば、侵入水を許容し、あるいは結露を招き
、密閉度の高いケーブルの腐食要因となる。このため、
ケーブル架設後に、前記空隙を埋めるべくセメントミル
ク、タールエポキシ等の防錆材を注入して永久防食して
いる。(Prior art) Parallel wire strand cables made of steel wires or steel wire bundles bundled in parallel allow water to enter or condensate if there are gaps inside the cable, that is, between the steel wires or between the steel wire bundles. This can lead to corrosion of highly sealed cables. For this reason,
After the cable is installed, a rust preventive material such as cement milk or tar epoxy is injected to fill the void to permanently prevent corrosion.
しかし、前記防錆材の圧入（グラウト）は、作業足場等
の構築が必要で非常に面倒であるし、また、ケーブルに
は相当な高低差もあることから、完璧なグラウトが保証
できない場合もあった。However, press-fitting (grouting) the rust preventive material is extremely troublesome as it requires the construction of work scaffolding, and there are also considerable height differences in the cables, so perfect grouting may not be guaranteed. there were.
そこで、第６図および第７図に示したプレ防食した平行
線ストランドケーブルが実用に供されている。Therefore, pre-corrosion-protected parallel wire strand cables shown in FIGS. 6 and 7 are put into practical use.
第６図のケーブル１は、亜鉛メツキ鋼ｖＡ２を平行に集
束しながら、引張強度および弾性係数を低下させない程
度のピッチで、ケーブル１に捻りを加え、押出し成形に
よる高密度ポリエチレン被覆３を施こすことで工場で防
食加工したものである。The cable 1 in Fig. 6 is made by converging galvanized steel vA2 in parallel, twisting the cable 1 at a pitch that does not reduce the tensile strength and elastic modulus, and applying a high-density polyethylene coating 3 by extrusion molding. This means that it has been treated with anti-corrosion treatment at the factory.
なお、第６図において４はフィラメントテープを示して
いる。In addition, in FIG. 6, 4 indicates a filament tape.
第７図のケーブル１０は、亜鉛メツキ鋼線１１又は亜鉛
メツキ鋼より線１１にわずかなねじりを与えながらセミ
パラレル状に束ね、鋼線１１間にグリース等の軟らかい
防錆材１２を充填し、高密度ポリエチレンチューブ１３
を直接押出し被覆したものである。The cable 10 in FIG. 7 is made by bundling galvanized steel wires 11 or galvanized steel strands 11 in a semi-parallel manner while giving a slight twist, and filling the spaces between the steel wires 11 with a soft anti-rust material 12 such as grease. High density polyethylene tube 13
directly extruded and coated.
なお、第７図において、１４は繊維テープであり、外形
を円に近く仕上げるものである。In addition, in FIG. 7, reference numeral 14 is a fiber tape whose outer shape is finished close to a circle.
（発明が解決しようとする課題）
第６図に示した従来例の１は、明らかにケーブル１の内
部には空気層が存在することになり、侵入水を許容し、
あるいは結露を招くものであった。(Problems to be Solved by the Invention) In the conventional example 1 shown in FIG. 6, there is clearly an air layer inside the cable 1, allowing water to enter,
Or it could lead to condensation.
第７図に示した従来例の２は、防錆材１２を完全に充填
することは困難であるし、架設後のケーブル振動により
防錆材１２が重力方向に移動する可能性が残されており
、これらによって、将来的に腐食の危険性があった。In conventional example 2 shown in FIG. 7, it is difficult to completely fill the rust preventive material 12, and there is a possibility that the rust preventive material 12 may move in the direction of gravity due to cable vibration after installation. This posed a risk of corrosion in the future.
なお、特開昭５８−１６９５８８号公報で開示のプレ防
食平行線ストランドケーブルは、鋼線間には従来例の１
と同様に空気層が存在しており、また、実開昭５６−５
３７９９号公報に開示のワイヤーロープは、ワイヤの周
りに樹脂が充填されているもののワイヤ相互が所謂バラ
バラの状態であり、このワイヤロープは、平行線ストラ
ンドケーブルの機能的要点である鋼線が密に詰まったコ
ンパクトな断面をもたせる点において不充分といえる。In addition, the pre-corrosion-proof parallel wire strand cable disclosed in Japanese Patent Application Laid-open No. 169588/1988 has one of the conventional examples between the steel wires.
Similarly, there is an air layer, and also,
The wire rope disclosed in Japanese Patent No. 3799 is filled with resin around the wires, but the wires are in a so-called disjoint state, and this wire rope has steel wires that are the functional key of a parallel strand cable tightly packed. It can be said that it is insufficient in that it has a compact cross section packed with space.
本発明は、叙述の問題点に鑑み、ケーブル断面をコンパ
クトに仕上げ、ソケットをできるだけ小型にして主構造
物への定着を容易にすることから鋼線相互を密着させて
コンパクトに製作される平行線ストランドケーブルであ
っても、ケーブル内部に空隙なく粘性のある樹脂を含浸
し綱線表面を均一に覆った平行線ストランドケーブルの
プレ防食方法を提供することが目的である。In view of the above-mentioned problems, the present invention aims to make the cable cross-section compact, make the socket as small as possible, and make it easier to fix it to the main structure. The object of the present invention is to provide a pre-corrosion prevention method for a parallel wire strand cable, in which the inside of the cable is impregnated with a viscous resin without any voids, and the wire surface is uniformly covered.
（課題を解決するための手段）
本発明が前述目的を達成するために講じた技術的手段は
、粘稠体である熱可塑性樹脂を鋼線又は鋼線束ごとに被
覆し該被覆樹脂を冷却固化し、その後、前記鋼線又は鋼
線束を平行に集束し該鋼線又は鋼線束上の前記被覆樹脂
を軟化して鋼線又は鋼線束間の空隙に充填して固化する
ことを特徴とするものである。(Means for Solving the Problem) The technical means taken by the present invention to achieve the above-mentioned object is to coat each steel wire or steel wire bundle with a viscous thermoplastic resin and cool and solidify the coated resin. Then, the steel wires or steel wire bundles are bundled in parallel, and the coating resin on the steel wires or steel wire bundles is softened and filled into the gaps between the steel wires or the steel wire bundles, and then solidified. It is.
（実施例と作用） 以下、図面を参照して本発明の詳細な説明する。(Examples and effects) Hereinafter, the present invention will be described in detail with reference to the drawings.
第１図および第２図は本発明のプレ防食法に直接使用す
る装置の一例を示しており、２ｏは亜鉛メツキした鋼線
（撚りを施したものでもよい）又は綱線束であり、ボビ
ン２１等に巻かれており、この鋼線又は鋼線束（以下、
単に鋼線という＞ ２０のそれぞれは粘稠体であるすな
わち軟化状態にある熱可塑性樹脂２２を収容している樹
脂槽２３にそれぞれ浸漬通過させることにより、鋼線２
ｏごとの表面全体に樹脂が被覆される。Figures 1 and 2 show an example of a device directly used in the pre-corrosion prevention method of the present invention, where 2o is a galvanized steel wire (which may be twisted) or a wire bundle; This steel wire or steel wire bundle (hereinafter referred to as
Each of the steel wires 20 is immersed in a resin bath 23 containing a thermoplastic resin 22 which is a viscous material, that is, in a softened state.
The entire surface of each o is coated with resin.
この被覆に用いる熱可塑性樹脂としては、例えば、剥離
接着強さ（ｋｇ／２５ｍｍ）が１４、引張破断伸度（％
）が６００％以上の付着力及び伸び特性を有する飽和ポ
リエステルを採用でき、また、被覆に用いる樹脂量はケ
ーブル製作完了時点でケーブル内の空隙を埋めつくすの
に十分な量とされる。The thermoplastic resin used for this coating has, for example, a peel adhesion strength (kg/25 mm) of 14 and a tensile elongation at break (%
) can be used as a saturated polyester having adhesion and elongation properties of 600% or more, and the amount of resin used for the coating is sufficient to completely fill the voids within the cable upon completion of cable fabrication.
具体的には、第５図において、鋼線２０の直線ｄが５ｍ
φの場合は、樹脂の被覆厚さｔは０．１２２ ｔｍ以上
とされ、鋼線２０の直線ｄが７ｍφの場合は、被覆厚さ
ｔは０．１７１閣以上とされる。Specifically, in FIG. 5, the straight line d of the steel wire 20 is 5 m.
In the case of φ, the coating thickness t of the resin is 0.122 tm or more, and when the straight line d of the steel wire 20 is 7 mφ, the coating thickness t is 0.171 tm or more.
ここで、被覆厚さｔは、ｔ≧２．４４％×ｄとされるが
、これを第４図を参照して説明する。Here, the coating thickness t is set to be t≧2.44%×d, which will be explained with reference to FIG. 4.
第４図において、正三角形の面積をＡと５、この正三角
形内における鋼線２０の扇形面積をＢとすると空隙率α
は、
−ＢＸ３
α−×１００
一一−メｓｉｎ ６０゜
一９．３１％
となる。In FIG. 4, if the area of an equilateral triangle is A and 5, and the sector area of the steel wire 20 within this equilateral triangle is B, then the porosity is α
is -BX3 α-×100 1-mesin 60°-9.31%.
そこで、鋼線２０を集束して互いに密接させ、前記空隙
率９．３１％を充分に樹脂で埋める（樹脂量１０％）と
すると、
ｔ＝（、／Ｔゴー１） ｄ ／ ２ ＝０．０２４４
ｄとなる。Therefore, if the steel wires 20 are bundled and brought into close contact with each other and the void ratio of 9.31% is sufficiently filled with resin (resin amount 10%), then t=(,/Tgo1) d/2 =0. 0244
d.
前述したように、各鋼線２０を樹脂槽２３にそれぞれ浸
漬通過することで、各鋼線２０の表面全体には所定厚み
の被覆膜２２Ａが被覆されるが、この鋼線２０を常温下
で所定長だけ送ると、この過程で前記被覆膜２２Ａは冷
却固化される。As described above, each steel wire 20 is immersed and passed through the resin bath 23, so that the entire surface of each steel wire 20 is coated with the coating film 22A of a predetermined thickness. When the coating film 22A is fed by a predetermined length, the coating film 22A is cooled and solidified during this process.
勿論、冷却雰囲気中で鋼線２０を通過させることにより
、その表面の被覆膜２２Ａを冷却固化させることもでき
る。Of course, by passing the steel wire 20 in a cooling atmosphere, the coating film 22A on the surface thereof can be cooled and solidified.
被覆膜２２Ａを冷却固化した鋼線２０は、これらが互い
に平行に集束されるが、この実施例ではローラ形の集束
装置２４に導入することで集束されることで鋼線２０は
互いに密接状態とされ、この集束された鋼線束２０Ａを
例えばヒータ装置２５に通過させることにより、前記鋼
線２０上で固化されていた被覆膜２２Ａは再度軟化され
、この軟化樹脂が鋼線２０間の空隙に流入充填され空隙
をすべて埋めつくし、余分な樹脂はスクレーバ装置２６
によって除去される。The steel wires 20 with the coating film 22A cooled and solidified are bundled parallel to each other, but in this embodiment, the steel wires 20 are brought into close contact with each other by being bundled by being introduced into a roller-type bundler 24. By passing this focused steel wire bundle 20A through, for example, a heater device 25, the coating film 22A that has been solidified on the steel wire 20 is softened again, and this softened resin fills the gaps between the steel wires 20. The resin flows in and fills all the voids, and the excess resin is removed by the scraper device 26.
removed by
而して、空隙を埋めつくした樹脂２２Ｂは常温下又は冷
却雰囲気下で鋼線束２ＱＡが通過することによって、冷
却固化され、その後、必要に応じて布テープ２７を巻付
けることによって鋼線束２０Ａが円形を保持し、線束２
０Ａに押出成形された耐候性に優れた高密度ポリエチレ
ンチューブ２８を被覆することで、第３図に示すように
、プレ防食された平行線ストランドケーブル２９が製作
される。The resin 22B that completely filled the voids is cooled and solidified by passing the steel wire bundle 2QA at room temperature or in a cooling atmosphere, and then, if necessary, by wrapping the cloth tape 27, the steel wire bundle 20A is Hold the circle and wire bundle 2
By covering the cable with a high-density polyethylene tube 28 extruded to 0A and having excellent weather resistance, a pre-corrosion-protected parallel wire strand cable 29 is manufactured as shown in FIG.
なお、前述において、鋼線ごとの樹脂被覆工程と、集束
工程はこれを連続ラインで実施することでも、両工程を
個別ラインで実施してもよい。また、集束装置２４およ
びスクレーパ装置２６はローラ式以外であってもよい。In addition, in the above, the resin coating process for each steel wire and the convergence process may be carried out in a continuous line, or both processes may be carried out in separate lines. Further, the focusing device 24 and the scraper device 26 may be of a type other than a roller type.
また、鋼線束２０Ａはこれに若干の撚りを付与すること
もできる。更に、熱可塑性樹脂はその融点が１２０°程
度であり、ケーブル内部に充填後、該ケーブルを架設等
しても樹脂２２Ｂの軟化、流動等は防止される。Further, the steel wire bundle 20A can also be slightly twisted. Further, the thermoplastic resin has a melting point of about 120°, and even if the cable is installed after being filled into the inside of the cable, the resin 22B is prevented from softening or flowing.
（発明の効果）
本発明は以上の通りであり、鋼線又は鋼線束ごとに粘稠
体である熱可塑性樹脂を被覆し、この被覆樹脂を冷却固
化してから平行に集束するので、集束過程では樹脂の所
謂ベト付きがなく、集束を正確・容易にできる。(Effects of the Invention) The present invention is as described above, and each steel wire or steel wire bundle is coated with a viscous thermoplastic resin, and the coating resin is cooled and solidified before being bundled in parallel. There is no so-called stickiness of the resin, and focusing can be done accurately and easily.
また、集束してから前記被覆樹脂を軟化するので軟化さ
れた樹脂は鋼線間の空隙に流入充填が容易となり、空隙
に充填された樹脂が固化されることによって、空隙が充
分に埋めつくされ、ここに、鋼線同士が密接された断面
がコンパクトとされたプレ防食法の平行線ストランドケ
ーブルを得ることができる。In addition, since the coating resin is softened after convergence, the softened resin can easily flow into and fill the gaps between the steel wires, and the resin filled in the gaps can be solidified to fully fill the gaps. Here, it is possible to obtain a pre-corrosion-protected parallel wire strand cable in which the steel wires are closely connected and the cross section is compact.
第１図は本発明方法に直接使用する装置−例の概念側面
図、第２図は同じ（概念平面図、第３図は本発明方法に
よって得られたケーブル−例の断面図、第４図は同部分
拡大断面図、第５図は樹脂を被覆した鋼線の断面図、第
６図と第７図は従来例によるケーブルの各断面図である
。
２０・・・鋼線（鋼線束）、２２・・・熱可塑性樹脂、
２２Ａ・・・被覆樹脂膜、２２Ｂ・・・充填樹脂、２９
・・・ケーブル。Fig. 1 is a conceptual side view of an example of a device directly used in the method of the present invention, Fig. 2 is the same (conceptual plan view), Fig. 3 is a sectional view of an example of a cable obtained by the method of the present invention, Fig. 4 is an enlarged sectional view of the same part, FIG. 5 is a sectional view of a steel wire coated with resin, and FIGS. 6 and 7 are each sectional view of a conventional cable. 20... Steel wire (steel wire bundle) , 22... thermoplastic resin,
22A...Covering resin film, 22B...Filled resin, 29
···cable.
Claims (1)
に被覆し該被覆樹脂を冷却固化し、その後、前記鋼線又
は鋼線束を平行に集束し該鋼線又は鋼線束上の前記被覆
樹脂を軟化して鋼線又は鋼線束間の空隙に充填して固化
することを特徴とする平行線ストランドケーブルのプレ
防食方法。(1) Coating each steel wire or steel wire bundle with a viscous thermoplastic resin, cooling and solidifying the coating resin, and then converging the steel wires or steel wire bundles in parallel and placing them on the steel wire or steel wire bundle. A pre-corrosion prevention method for a parallel wire strand cable, characterized in that the coating resin is softened and filled into gaps between steel wires or steel wire bundles, and then solidified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14901990A JPH0440265A (en) | 1990-06-06 | 1990-06-06 | Pre-corrosion prevention for parallel strand cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14901990A JPH0440265A (en) | 1990-06-06 | 1990-06-06 | Pre-corrosion prevention for parallel strand cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0440265A true JPH0440265A (en) | 1992-02-10 |
Family
ID=15465896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14901990A Pending JPH0440265A (en) | 1990-06-06 | 1990-06-06 | Pre-corrosion prevention for parallel strand cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0440265A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2360579A (en) * | 2000-03-14 | 2001-09-26 | Delphi Tech Inc | Air conditioning system for a motor vehicle |
-
1990
- 1990-06-06 JP JP14901990A patent/JPH0440265A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2360579A (en) * | 2000-03-14 | 2001-09-26 | Delphi Tech Inc | Air conditioning system for a motor vehicle |
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