JPH0547447A - Method for making cable branch connection watertight - Google Patents
Method for making cable branch connection watertightInfo
- Publication number
- JPH0547447A JPH0547447A JP3224930A JP22493091A JPH0547447A JP H0547447 A JPH0547447 A JP H0547447A JP 3224930 A JP3224930 A JP 3224930A JP 22493091 A JP22493091 A JP 22493091A JP H0547447 A JPH0547447 A JP H0547447A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- waterproof
- piece
- admixture
- cover
- 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.)
- Granted
Links
Landscapes
- Manufacturing Of Electrical Connectors (AREA)
- Cable Accessories (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は架空配電線の分岐接続部
を水密化する方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for making a branch connection portion of an overhead distribution line watertight.
【0002】[0002]
【従来の技術】架空配電線においては、銅導体の応力腐
食を防止するために、電線に被覆線を用い、その電線接
続部を水密化することが必要である。しかし、電線の分
岐接続部は、直線接続部に較べて形状が複雑であり、通
常のテ−プ巻方式では、水密化処理が困難である。2. Description of the Related Art In overhead distribution lines, in order to prevent stress corrosion of a copper conductor, it is necessary to use a covered wire for the wire and to make the wire connection portion watertight. However, the branch connection portion of the electric wire is more complicated in shape than the straight connection portion, and it is difficult to perform the watertightening treatment by the normal tape winding method.
【0003】而るに、本出願人においては、両端部の内
側面に防水混和物層を設けたカバ−を電線の分岐接続部
上に抱合してカバ−内両端の防水混和物層を圧縮し、こ
の圧縮防水混和物層によってカバ−両端をシ−ルするこ
とを既に提案した(特公昭55−2436号公報)。Therefore, the applicant of the present invention compresses the waterproof admixture layers at both inner ends of the cover by tying the covers having the waterproof admixture layers on the inner surfaces of both ends on the branch connecting portions of the electric wires. However, it has already been proposed to seal both ends of the cover with this compression waterproof mixture layer (Japanese Patent Publication No. 55-2436).
【0004】この水密化処理方法は、テ−プ巻処理方法
に較べて作業が容易であり、防水混和物層の粘弾性に基
づく押圧変形性のためにテ−プ巻処理よりも優れた水密
性が期待できる。This watertightening treatment method is easier to work than the tape winding treatment method, and is superior to the tape winding treatment because of the pressure deformability based on the viscoelasticity of the waterproof admixture layer. Can be expected.
【0005】[0005]
【発明が解決しようとする課題】しかしながら、防水混
和物シ−ル箇所での本線と分岐線との間隙が10mm以下
になると、防水混和物層でその間隙を完全に充填するこ
とは困難である。本発明の目的は上記カバ−方式により
電線の分岐接続部を優れた水密性で処理できる方法を提
供することにある。However, if the gap between the main line and the branch line at the location of the waterproof mixture seal is 10 mm or less, it is difficult to completely fill the gap with the waterproof mixture layer. .. An object of the present invention is to provide a method capable of treating a branch connection part of an electric wire with excellent watertightness by the cover method.
【0006】[0006]
【課題を解決するための手段】本発明に係わる電線分岐
接続部の水密化方法は両端部内側面に防水混和層を設け
たカバ−を電線の分岐接続部に抱合し、該抱合体内の両
端を上記の防水混和物層で水密にする方法において、本
線と分岐線との間に上記防水混和物よりも圧縮変形量の
大なる防水混和物のピ−スを介在させ、上記カバ−の抱
合によって上記防水混和物層を圧縮するとともに防水混
和物ピ−スを圧縮して両者を密着させることを特徴とす
る構成である。According to the method for watertightening an electric wire branch connection portion according to the present invention, a cover having a waterproof admixture layer provided on the inner surface of each end portion is tied to the electric wire branch connection portion, and both ends in the conjugate are connected. In the method of making watertight with the waterproof admixture layer, a pace of the waterproof admixture having a larger amount of compressive deformation than the waterproof admixture is interposed between the main line and the branch line, and by conjugating the cover. The waterproof admixture layer is compressed and the waterproof admixture piece is compressed to bring them into close contact with each other.
【0007】[0007]
【作用】本線と分岐線との間の防水混和物ピ−スが大な
る圧縮変形量で変形するので、優れた水密化を保証でき
る。Since the waterproof admixture piece between the main line and the branch line is deformed by a large amount of compressive deformation, excellent watertightness can be guaranteed.
【0008】[0008]
【実施例】以下、図面により本発明の実施例について説
明する。図1の(イ)は本発明において使用するカバ−
の一例を示す展開平面図、図1の(ロ)は図1の(イ)
におけるロ−ロ断面図である。図1の(イ)並びに
(ロ)において、1はカバ−本体(例えば、ポリエチレ
ン樹脂、ポリプロピレン樹脂、ポリスチレン樹脂、AB
S樹脂製)であり、中央に折畳線11を、該折畳線11
を挾む両側には膨出形状の側壁部12,12をそれぞれ
備え、各側壁部12,12には耳部13,13を設けて
ある。21,22はカバ−本体両端部の内側面に設け
た、粘弾性を有する防水混和物層であり、例えば、ブチ
ルゴム、エチレン−プロピレン−タ−ポリマ−等のゴム
類を主成分とするものを用いることができる。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A shows the cover used in the present invention.
FIG. 1 (B) is a developed plan view showing an example of FIG.
FIG. 6 is a sectional view taken along line ‘ In FIGS. 1A and 1B, 1 is a cover body (eg, polyethylene resin, polypropylene resin, polystyrene resin, AB).
(Made of S resin), and the folding line 11 is provided at the center.
Side walls 12 and 12 each having a bulge shape are provided on both sides of the side wall, and ears 13 and 13 are provided on the side walls 12 and 12, respectively. Reference numerals 21 and 22 denote waterproof mixture layers having viscoelasticity provided on the inner side surfaces of both ends of the cover body, for example, those containing rubbers such as butyl rubber and ethylene-propylene-terpolymer as a main component. Can be used.
【0009】図2は本発明によって処理した架空配電線
の分岐接続部を示し、上記のカバ−1の耳部13,13
の接着剤による接着によって電線の分岐接続分上に抱合
され、カバ−1の片端側から分岐線(絶縁被覆線)31
が引出され、この分岐線31と本線(絶縁被覆線)30
との間に、防水混和物ピ−ス4が、カバ−片端側の防水
混和物層21に接触して介在され、この防水混和物ピ−
ス4と防水混和物層21とが密着一体化されている。FIG. 2 shows a branch connection portion of an overhead distribution line treated according to the present invention, and the ear portions 13 and 13 of the cover-1 described above.
Is bonded on the branch connection portion of the electric wire by adhesion with the adhesive, and the branch wire (insulation covered wire) 31 is attached from one end side of the cover-1.
Is pulled out, and the branch line 31 and the main line (insulated line) 30
The waterproof admixture piece 4 is interposed between and in contact with the waterproof admixture layer 21 on one end side of the cover.
The cloth 4 and the waterproof admixture layer 21 are closely integrated.
【0010】本発明により電線の分岐接続部を水密化処
理するには、まず、上記のカバ−1を開拡状態のままで
電線分岐接続部に配し、次いで、分岐線引出し側のカバ
−片端の防水混和物層21の位置において、本線と分岐
線との間の隙間に、上記防水混和物層21よりも圧縮変
形量の大なる粘弾性混和物のピ−スを、少なくともその
ピ−スの一部が防水混和物層21にかかるようにして介
在させ、この状態で、上記カバ−を中央折畳線の折り曲
げによって電線の分岐接続部上に抱合し、耳部を接着す
るとともに防水混和物層を圧縮する。この場合、カバ−
が抱合されるに従って、防水混和物層が圧縮されてい
く。To water-tighten the branch connection part of the electric wire according to the present invention, first, the cover-1 is placed in the electric wire branch connection part in the expanded state, and then the cover on the branch line drawing side. At the position of the waterproof admixture layer 21 at one end, at least the piece of the viscoelastic admixture having a larger amount of compressive deformation than the waterproof admixture layer 21 is provided in the gap between the main line and the branch line. A part of the cloth is interposed so as to cover the waterproof admixture layer 21, and in this state, the cover is bound on the branch connection part of the electric wire by bending the central folding line to bond the ear part and to waterproof. Compress the admixture layer. In this case, the cover
As they are bound together, the waterproof admixture layer is compressed.
【0011】図3は圧縮途中の状態を図示し、1はカバ
−を、30は本線を、31は分岐線を、21は防水混和
物層を、4は防水混和物ピ−ス、5,…隙間をそれぞれ
示している。FIG. 3 shows a state during compression, wherein 1 is a cover, 30 is a main line, 31 is a branch line, 21 is a waterproof admixture layer, 4 is a waterproof admixture piece, 5, … Indicates each gap.
【0012】図3において、電線30,31が防水混和
物に対しては、剛体に近いために防水混和物ピ−ス4が
イ方向に圧縮され、この圧縮に伴うポアソン比に基づく
変形により防水混和物ピ−ス4の横方向(ロ方向)伸び
が発生し、この伸びにより防水混和物層21が押圧され
てロ方向に圧縮される。この場合、防水混和物層21並
びに防水混和物ピ−ス4がともに粘弾性を有するから、
防水混和物層21並びに防水混和物ピ−ス4に作用する
圧縮応力(圧力)は実質上等しい。In FIG. 3, since the electric wires 30 and 31 are close to a rigid body to the waterproof mixture, the waterproof mixture piece 4 is compressed in the direction a, and the compression is caused by the deformation based on the Poisson's ratio. A lateral (b) direction expansion of the admixture piece 4 occurs, and this expansion causes the waterproof admixture layer 21 to be pressed and compressed in the o direction. In this case, since the waterproof admixture layer 21 and the waterproof admixture piece 4 both have viscoelasticity,
The compressive stress (pressure) acting on the waterproof admixture layer 21 and the waterproof admixture piece 4 is substantially equal.
【0013】而るに、同一圧力下での防水混和物層21
の圧縮変形量を防水混和物ピ−ス4の圧縮変形量よりも
小としてあり、かつ、防水混和物層21並びに混和物ピ
−ス4に作用する圧縮応力を、それらの粘弾性のために
実質上同等にできるから、例えば、防水混和物ピ−ス4
に防水混和物層21と同一圧縮変形量のものを用いた場
合に較べ、防水混和物層21の上記ロ方向圧縮変形量を
小さくできる。この防水混和物ピ−スの圧縮変形量の減
少は、防水混和物ピ−ス4の変形によって充填すべき隙
間の増大を抑制することになるから、防水混和物ピ−ス
の変形量が大であることと相俟って、上記の隙間5,…
を完全に充填できる。Therefore, the waterproof admixture layer 21 under the same pressure
Is smaller than that of the waterproof admixture piece 4, and the compressive stress acting on the waterproof admixture layer 21 and the admixture piece 4 is due to their viscoelasticity. For example, the waterproof admixture piece 4 can be made substantially the same.
In comparison with the case where the same amount of compressive deformation as the waterproof admixture layer 21 is used, the amount of compressive deformation of the waterproof admixture layer 21 in the direction B can be reduced. This reduction in the compression deformation amount of the waterproof admixture piece suppresses an increase in the gap to be filled due to the deformation of the waterproof admixture piece 4, so that the deformation amount of the waterproof admixture piece is large. Combined with that, the above gap 5, ...
Can be completely filled.
【0014】現に、カバ−の防水混和物層に、荷重1k
g、1分間での圧縮変形量が20%の粘弾性体を使用
し、本線と分岐線との間(10mmの間隙)に介在させる
粘弾性ピ−スに20%圧縮変形量のものを使用したとこ
ろ、30%もの空隙が残存したが、粘弾性ピ−スに25
%圧縮変形量のものを使用すると、空隙の残存を0にで
きた。また、カバ−の防水混和物層に、荷重1kg、1分
間での圧縮変形量が40%の粘弾性体を使用し、本線と
分岐線との間(10mmの間隙)に介在させる粘弾性ピ−
スに60%圧縮変形量のものを使用したところ、空隙の
残存を0にできた。Actually, a load of 1 k is applied to the waterproof mixture layer of the cover.
g Use a viscoelastic body with a compression deformation amount of 20% per minute, and use a viscoelastic piece with a 20% compression deformation amount between the main line and the branch line (gap of 10 mm). As a result, 30% of the voids remained, but the viscoelastic piece had 25
When the one with a% compressive deformation amount was used, the remaining voids could be reduced to zero. Further, a viscoelastic body having a compressive deformation amount of 40% per minute under a load of 1 kg is used for the waterproof mixture layer of the cover, and is interposed between the main line and the branch line (gap of 10 mm). −
When a 60% compressive deformation amount was used for the cloth, residual voids could be reduced to zero.
【0015】本発明において、カバ−の防水混和物層の
圧縮変形量と防水混和物ピ−スの圧縮変形量との比が1
に近づくほど上記した水密性の向上効果が小さくなって
いく。従って、その比を1.2以上とすることが有効で
ある。In the present invention, the ratio of the compression deformation amount of the waterproof admixture layer of the cover to the compression deformation amount of the waterproof admixture piece is 1
The effect of improving the watertightness described above becomes smaller as the temperature becomes closer to. Therefore, it is effective to set the ratio to 1.2 or more.
【0016】本発明によって水密化された電線の分岐接
続部においては、圧縮変形量の小さい防水混和物層がカ
バ−の重量を支承し、圧縮変形量の大なる防水混和物ピ
−スにはカバ−の自重を作用させなくても済むから、上
記した水密性を長期にわたって安定に維持できる。In the water-tight branched connection portion of the electric wire according to the present invention, the waterproof admixture layer having a small amount of compressive deformation bears the weight of the cover, and the waterproof admixture piece having a large amount of compressive deformation does not exist. Since it is not necessary to apply the weight of the cover, the watertightness can be stably maintained for a long period of time.
【0017】[0017]
【発明の効果】本発明に係わる電線分岐接続部の水密化
方法によれば、上述した通り、両端部の内側面に防水混
和物層を設けたカバ−を電線の分岐接続部上に抱合して
当該分岐接続部を水密化する場合、本線と分岐線との間
に上記の防水混和物層よりも圧縮変形量の大なる防水混
和物ピ−スを介在させるだけで、本線と分岐線との間の
間隙が10mm以下といった、従来法では水密化が困難な
分岐接続部をも容易に水密化できる。As described above, according to the watertightening method of the electric wire branch connecting portion of the present invention, the cover having the waterproof admixture layer provided on the inner side surfaces of both ends is joined to the electric wire branch connecting portion. In the case of water-tightening the branch connection portion by simply inserting a waterproof admixture piece having a larger amount of compressive deformation than the waterproof admixture layer between the main line and the branch line, the main line and the branch line can be separated from each other. It is possible to easily water-tighten a branch connection portion, which is difficult to be water-tightened by the conventional method, such as a gap of 10 mm or less.
【図1】図1の(イ)は本発明において使用するカバ−
の展開状態を示す平面説明図、図1の(ロ)は図1の
(イ)におけるロ−ロ断面図である。FIG. 1A is a cover used in the present invention.
2 is an explanatory plan view showing a developed state of FIG. 1, and FIG. 1B is a sectional view taken along line A-B of FIG.
【図2】本発明によって水密化した電線の分岐接続部を
示す説明図である。FIG. 2 is an explanatory view showing a branch connection portion of a water-tight electric wire according to the present invention.
【図3】本発明における防水混和物による水密化状態を
示す説明図である。FIG. 3 is an explanatory view showing a watertight state by the waterproof admixture according to the present invention.
1 カバ− 21 防水混和物層 30 本線 31 分岐線 4 防水混和物ピ−ス。 1 cover 21 waterproof admixture layer 30 main line 31 branch line 4 waterproof admixture piece.
Claims (2)
を電線の分岐接続部に抱合し、該抱合体内の両端を上記
の防水混和物層で水密にする方法において、本線と分岐
線との間に上記防水混和物よりも圧縮変形量の大なる防
水混和物のピ−スを介在させ、上記カバ−の抱合によっ
て上記防水混和物層を圧縮するとともに防水混和物ピ−
スを圧縮して両者を密着させることを特徴とする電線分
岐接続部の水密化方法。1. A cover provided with a waterproof admixture layer on the inner surface of both ends.
In a method of tying a wire to a branch connection part of the electric wire and water-tightening both ends in the conjugate with the above-mentioned waterproof admixture layer, a waterproof with a larger amount of compressive deformation than the waterproof admixture between the main line and the branch line. The waterproof admixture layer is compressed by the conjugation of the cover with the admixture piece interposed, and the waterproof admixture piece is formed.
A method for watertightening a wire branch connection part, characterized by compressing the wire and bringing them into close contact with each other.
縮変形量を防水混和物層の圧縮変形量の1.2倍以上と
することを特徴とする電線分岐接続部の水密化方法。2. The method for watertightening a wire branch connecting portion according to claim 1, wherein the compression deformation amount of the waterproof admixture piece is 1.2 times or more the compression deformation amount of the waterproof admixture layer. ..
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3224930A JP3032617B2 (en) | 1991-08-09 | 1991-08-09 | Water-tightening method of wire branch connection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3224930A JP3032617B2 (en) | 1991-08-09 | 1991-08-09 | Water-tightening method of wire branch connection |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0547447A true JPH0547447A (en) | 1993-02-26 |
JP3032617B2 JP3032617B2 (en) | 2000-04-17 |
Family
ID=16821407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3224930A Expired - Lifetime JP3032617B2 (en) | 1991-08-09 | 1991-08-09 | Water-tightening method of wire branch connection |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3032617B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11205992A (en) * | 1998-01-13 | 1999-07-30 | Yazaki Corp | Mold structure of wire branch part |
JP2008141906A (en) * | 2006-12-05 | 2008-06-19 | Furukawa Electric Co Ltd:The | Reusable insulating cover |
-
1991
- 1991-08-09 JP JP3224930A patent/JP3032617B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11205992A (en) * | 1998-01-13 | 1999-07-30 | Yazaki Corp | Mold structure of wire branch part |
JP2008141906A (en) * | 2006-12-05 | 2008-06-19 | Furukawa Electric Co Ltd:The | Reusable insulating cover |
Also Published As
Publication number | Publication date |
---|---|
JP3032617B2 (en) | 2000-04-17 |
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