JP2002027628A - Assembly method for rubber-molded one-piece joint - Google Patents
Assembly method for rubber-molded one-piece jointInfo
- Publication number
- JP2002027628A JP2002027628A JP2000203654A JP2000203654A JP2002027628A JP 2002027628 A JP2002027628 A JP 2002027628A JP 2000203654 A JP2000203654 A JP 2000203654A JP 2000203654 A JP2000203654 A JP 2000203654A JP 2002027628 A JP2002027628 A JP 2002027628A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- unit
- cable
- lubricating oil
- molded
- 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
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
- Processing Of Terminals (AREA)
- Cable Accessories (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はＣＶケーブルの如き
電力ケーブルの接続部として使用されるゴムモールド式
ワンピースジョイントの組立工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 assembling a rubber molded one-piece joint used as a connection portion of a power cable such as a CV cable.
【０００２】[0002]
【従来の技術】ゴムモールド式ワンピースジョイントの
一例の要部の縦断面図を図３に示す。図面において、３
はＣＶケーブル１ａ，１ｂの絶縁体、４は絶縁体外部半
導電層、２はケーブル導体、５は導体接続部である。導
体接続部５上には、絶縁ゴム部１１の内周面に導電性ゴ
ムの内部電極１２、外周面に導電性ゴムの外部半導電層
１３を、予め一体成形したゴムモールドユニット１０が
挿着されており、その弾性力によりケーブル絶縁体３の
外周面上に密着し、接続部の絶縁部を形成している。2. Description of the Related Art FIG. 3 shows a longitudinal sectional view of an essential part of an example of a rubber molded one-piece joint. In the drawing, 3
Is an insulator of the CV cables 1a and 1b, 4 is an insulator outer semiconductive layer, 2 is a cable conductor, and 5 is a conductor connecting portion. A rubber mold unit 10 in which an inner electrode 12 made of conductive rubber is formed on the inner peripheral surface of the insulating rubber portion 11 and an outer semiconductive layer 13 made of conductive rubber is formed on the outer peripheral surface is integrally mounted on the conductor connecting portion 5. Due to the elastic force of the cable insulator 3, the cable insulator 3 comes into close contact with the outer peripheral surface of the cable insulator 3 to form an insulating portion of the connecting portion.
【０００３】この接続部の組立に際しては、ケーブル絶
縁体外径より大きな内径をもったパイプ上にゴムモール
ドユニットを予め拡径（プレ拡径と呼ぶ）して、ケーブ
ルコア接続前にケーブルコア上に送り込む。このパイプ
はプラスチック製の直管パイプであったり、らせん状に
取り去る事が出来るパイプ状構造体であったりする。At the time of assembling the connecting portion, a rubber mold unit is previously expanded on a pipe having an inner diameter larger than the outer diameter of the cable insulator (referred to as a pre-expansion), and the rubber mold unit is mounted on the cable core before connecting the cable core. Send in. This pipe may be a straight pipe made of plastic or a pipe-like structure that can be spirally removed.
【０００４】ケーブルコア接続後は、ゴムモールドユニ
ットを所定の位置に戻してから拡径パイプを引抜いて、
ゴムモールドユニットをケーブル絶縁体上に密着させ
る。After connecting the cable core, the rubber mold unit is returned to a predetermined position, and then the expanded pipe is pulled out.
The rubber mold unit is brought into close contact with the cable insulator.
【０００５】上記工程の中で、パイプ上へのプレ拡径お
よびケーブルコア上挿着の際には、シリコン油などの潤
滑油が使用される（プレ拡径時には、ゴムユニット内
面、拡径パイプ表面に塗布、ケーブル挿着時には、ケー
ブルコア表面に塗布）。[0005] In the above process, a lubricating oil such as silicon oil is used for pre-expansion on a pipe and insertion on a cable core. Apply to the surface, apply to the cable core surface when inserting the cable).
【０００６】この潤滑油はゴムモールドユニット拡径時
の潤滑性を確保し、プレ拡径作業を容易に行わしめるも
のであり、比較的高粘度（１万ｃｓｔ程度）の油が使用
される。また、ケーブル挿着時にもプレ拡径時と同粘度
のシリコン油が使用されている。This lubricating oil ensures lubricity when expanding the diameter of the rubber mold unit and facilitates the pre-expanding operation. Oil having a relatively high viscosity (about 10,000 cst) is used. Also, at the time of cable insertion, silicone oil having the same viscosity as that at the time of pre-diameter expansion is used.
【０００７】[0007]
【発明が解決しようとする課題】ゴムモールドユニット
のケーブル挿着時にコア表面に塗布する潤滑油は、挿着
時作業性の改善と挿着時巻き込みボイドを排出、または
溶解する作用があるが、前項で記述した様に、従来技術
ではケーブル挿着時の潤滑油も比較的高粘度の潤滑油を
使用するため、挿着直後のボイド排出作用が低い、
挿着直後の潤滑油膜厚が厚い、などの現象が起こる。The lubricating oil applied to the core surface at the time of inserting the cable into the rubber mold unit has an effect of improving workability at the time of insertion and discharging or dissolving the entangled void at the time of insertion. As described in the previous section, the conventional technology uses a relatively high-viscosity lubricating oil as the lubricating oil at the time of cable insertion, so that the void discharging action immediately after insertion is low.
Phenomena such as a thick lubricating oil film immediately after insertion occur.
【０００８】上記では界面に組立時の巻き込みボイド
が残留する危険性がある。また一般に界面の潤滑油膜厚
は薄い程高い電気性能が得られる事が判っており、上記
では充分な電気性能を得るためには接続部組立後から
使用までに長時間放置が必要となっている。[0008] In the above, there is a risk that entrapment voids during assembly remain at the interface. In general, it is known that the thinner the lubricating oil film thickness at the interface, the higher the electrical performance can be obtained, and in order to obtain sufficient electrical performance, it is necessary to leave the connection portion after assembly for a long time before use. .
【０００９】[0009]
【課題を解決するための手段】本発明は上述の問題点を
解消したゴムモールドワンピースジョイントの組立工法
を提供するもので、本発明では以下の工法を採用する。SUMMARY OF THE INVENTION The present invention provides a method of assembling a rubber molded one-piece joint which solves the above-mentioned problems. The present invention employs the following method.
【００１０】電力ケーブルの接続時、ゴムモールド筒状
ユニットを、その内径部にケーブル絶縁体外径より大き
な内径を有する拡径管を挿通して予め一方のケーブル側
に逃がしておき、ケーブル導体接続後にケーブル導体接
続部上に戻し、前記拡径管を引き抜くことにより前記ゴ
ムモールド筒状ユニットをその弾性力により収縮させて
ケーブル絶縁体外周上に挿着する接続部の組立におい
て、上記ゴムモールド筒状ユニットの内径部に拡径管を
挿通する時には、ゴムモールド筒状ユニット内面及び拡
径管表面に１×１０４ｃｓｔクラスの高粘度潤滑油を塗
布し、ゴムモールド筒状ユニットをケーブル絶縁体外周
上に挿着する時には、ケーブル絶縁体表面に１×１０３
ｃｓｔクラスの低粘度潤滑油を塗布することを特徴とす
る。At the time of connecting the power cable, the rubber molded cylindrical unit is inserted into an inner diameter portion of an expanded tube having an inner diameter larger than the outer diameter of the cable insulator, and escaped to one cable side in advance. Returning to the cable conductor connection portion, the rubber mold tubular unit is contracted by its elastic force by pulling out the expanded tube, and the rubber mold tubular unit is assembled in the assembly of the connection portion to be inserted on the outer periphery of the cable insulator. When the expanded tube is inserted into the inner diameter of the unit, a high viscosity lubricating oil of 1 × 10 4 cst class is applied to the inner surface of the rubber molded cylindrical unit and the surface of the expanded tube, and the rubber molded cylindrical unit is connected to the outer periphery of the cable insulator. When inserting on top, 1 × 10 3
It is characterized by applying a low viscosity lubricant of cst class.
【００１１】上記組立工法によりプレ拡径時に従来工法
と同様の作業性を確保できる（プレ拡径で低粘度油を使
用すると、拡径パイプ／ゴムユニット間の摩擦が大きく
なり、パイプ挿入にかなり大きな力を必要とするが、場
合によっては局部への応力集中によりゴムユニットの裂
断等の不具合を発生する）。[0011] By the above-mentioned assembling method, the same workability as the conventional method can be ensured at the time of pre-expanding. A large force is required, but in some cases, stress concentration on a local area may cause problems such as tearing of the rubber unit).
【００１２】ケーブル挿着時には、拡径管を引抜いてケ
ーブル絶縁体上にゴムユニットを密着させるが、この時
大きな摩擦力が働くのは拡径管／ゴムユニット間であ
り、ここには高粘度油を使用している。一方でケーブル
絶縁体上に挿着される時はゴムユニットがある程度収縮
した状態のため摩擦力は小さく、またゴムユニットを大
きく移動させる必要がない（挿着位置の微調整程度）の
で、低粘度の潤滑油で充分作業可能である。When inserting the cable, the expanded tube is pulled out and the rubber unit is brought into close contact with the cable insulator. At this time, a large frictional force acts between the expanded tube and the rubber unit. Uses oil. On the other hand, when the rubber unit is inserted into the cable insulator, the frictional force is small because the rubber unit has contracted to some extent, and there is no need to move the rubber unit significantly (only fine adjustment of the insertion position), so low viscosity The lubricating oil can work satisfactorily.
【００１３】低粘度潤滑油使用のメリットは、組立時の
巻込みボイドの排出能力が向上し、また油膜厚が薄くな
ることから、組立直後より界面の高い電気性能を確保す
る事が出来ることである。The advantage of using a low-viscosity lubricating oil is that, since the ability to discharge entangled voids during assembly is improved and the oil film thickness is reduced, higher electrical performance at the interface can be ensured immediately after assembly. is there.
【００１４】[0014]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して説明する。図１は本発明に係るゴムモールド
ワンピースジョイントの組立工程を示す説明図である。
図１において、（イ）は本接続部の組立に先立って、ケ
ーブル絶縁体外径より内径の大きなパイプ２０上にゴム
モールド筒状ユニット（以下ゴムユニットと呼ぶ）１０
を送り込むプレ拡径を示す。次に（ロ）に示すように、
ＣＶケーブル１ａ，１ｂのそれぞれ導体２、絶縁体３お
よび外部半導電層４を順次段剥ぎして端末処理されたＣ
Ｖケーブル１ａの導体２に、圧縮接続型の導体接続管５
を挿入圧縮接続した後、前記ゴムユニット１０をＣＶケ
ーブル１ａ側に挿入して寄せておく。ついで、（ハ）に
示すように、導体接続管５にＣＶケーブル１ｂの導体２
を挿入圧縮接続し、導体接続部上に導電または半導電の
カバー６を装着する。次に、（ニ）に示すように、前記
ゴムユニット１０を正規位置まで戻し、拡径パイプ２０
を引き抜く。ついで、（ホ）に示すように、ゴムユニッ
ト１０は、その収縮力でケーブル絶縁体３および導体接
続部カバー６の表面と密着される。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing an assembly process of a rubber molded one-piece joint according to the present invention.
In FIG. 1, (a) shows a rubber molded cylindrical unit (hereinafter referred to as a rubber unit) 10 on a pipe 20 having an inner diameter larger than the outer diameter of the cable insulator before assembling the main connecting portion.
Shows the pre-expansion for feeding Next, as shown in (b),
The conductor 2, the insulator 3, and the external semiconductive layer 4 of the CV cables 1a and 1b are sequentially stripped off and the terminal treatment is performed.
The conductor connection pipe 5 of the compression connection type is connected to the conductor 2 of the V cable 1a.
After inserting and compression-connecting, the rubber unit 10 is inserted into the CV cable 1a side and brought close. Next, as shown in (c), the conductor 2 of the CV cable 1b is
Is inserted and compressed, and a conductive or semiconductive cover 6 is mounted on the conductor connection portion. Next, as shown in (d), the rubber unit 10 is returned to the normal position,
Pull out. Next, as shown in (e), the rubber unit 10 is brought into close contact with the surfaces of the cable insulator 3 and the conductor connection portion cover 6 by the contraction force.
【００１５】本発明の特徴とするところは、上記の工程
の内、プレ拡径（図１（イ））においては高粘度（１×
１０４ｃｓｔクラス）の潤滑油を使用し、ゴムユニット
のケーブル挿着時（図１（ホ））には低粘度（１×１０
３ｃｓｔクラス）の潤滑油を使用することである。The feature of the present invention is that, of the above steps, the pre-expansion (FIG. 1A) has a high viscosity (1 ×
10 4 cst class) lubricating oil, and low viscosity (1 × 10
3 cst class).
【００１６】実施例を表１に示す。Examples are shown in Table 1.
【００１７】[0017]
【表１】 プレ拡径時には従来工法と同様の作業性を確保でき、一
方、ケーブル挿着時には、ゴムユニットがある程度収縮
した状態なので摩擦力は小さく、またゴムユニットを大
きく移動させる必要がない（挿着位置の微調整程度）の
で、低粘度の潤滑油で充分作業可能である。[Table 1] At the time of pre-expansion, the same workability as the conventional method can be ensured. On the other hand, when the cable is inserted, the rubber unit is contracted to some extent, so the frictional force is small, and it is not necessary to move the rubber unit greatly (the position of the insertion position). Fine adjustment), so low-viscosity lubricating oil can be used.
【００１８】低粘度潤滑油使用のメリットは、組立時の
巻込みボイドの排出能力が向上し、また油膜厚が薄くな
ることから、組立直後より高い電気性能の界面を確保す
ることが出来る。The advantage of using a low-viscosity lubricating oil is that the capability of discharging entangled voids during assembling is improved and the oil film thickness is reduced, so that an interface having higher electrical performance than immediately after assembling can be secured.
【００１９】ゴムユニット組立を模擬した状態（図２参
照）をつくり、ゴムユニットとケーブルとの界面の巻き
込みボイドの挙動を比較した。なお、この実験のボイド
は拡径パイプ引抜き後、毛細管によりさらに強制的にボ
イドを封入したものである。A state simulating the assembly of the rubber unit (see FIG. 2) was prepared, and the behavior of the entangled void at the interface between the rubber unit and the cable was compared. The voids in this experiment were obtained by forcibly enclosing the voids with a capillary after drawing out the expanded pipe.
【００２０】ボイド観察実験結果を表２に示す。Table 2 shows the results of the void observation experiment.
【００２１】[0021]
【表２】 表２に示すように、高粘度潤滑油を使用した場合は初期
に発生するボイドが大きく、時間経過後もボイド消失が
遅いことがわかる。[Table 2] As shown in Table 2, when the high-viscosity lubricating oil was used, the voids generated at the initial stage were large, and it was found that void disappearance was slow even after a lapse of time.
【００２２】[0022]
【発明の効果】以上説明したように、本発明のゴムモー
ルドワンピースジョイントの組立工法によれば、ゴムモ
ールドワンピース（ゴムユニット）の拡径時には高粘度
潤滑油を使用するため、拡径管挿入時の摩擦力は低く抑
えられ、従来工法と同等な容易さで作業が可能であり、
ゴムユニット挿着時に低粘度潤滑油を使用するためゴム
ユニット挿着時の巻き込みボイドが発生しにくい工法と
なる。As described above, according to the method of assembling the rubber mold one-piece joint of the present invention, when the rubber mold one-piece (rubber unit) is expanded, high viscosity lubricating oil is used. The frictional force of is low, work is possible with the same ease as the conventional method,
Since a low-viscosity lubricating oil is used when the rubber unit is inserted, the method is such that entrapment voids do not easily occur when the rubber unit is inserted.
【００２３】低粘度潤滑油使用により、ユニット挿着時
に巻き込みボイドが発生した場合でも、ボイドが排出し
やすく、また、界面の油膜厚が薄くなり、組立直後より
高い界面電気性能が確保される。By using a low-viscosity lubricating oil, even if a entangled void occurs when the unit is inserted into the unit, the void is easily discharged, and the oil film thickness at the interface is reduced, so that higher interfacial electric performance is secured than immediately after assembly.
【００２４】よって、電力ケーブルの接続部の形成にお
いて性能面及びコスト低減に大きく寄与する。Therefore, it greatly contributes to performance and cost reduction in forming the connection portion of the power cable.
【図１】本発明に係るゴムモールドワンピースジョイン
トの組立工法を示す説明図である。FIG. 1 is an explanatory view showing a method of assembling a rubber molded one-piece joint according to the present invention.
【図２】本発明に係るゴムモールドワンピースジョイン
トの組立を模擬した実験を示す説明図である。FIG. 2 is an explanatory view showing an experiment simulating the assembly of a rubber mold one-piece joint according to the present invention.
【図３】ゴムモールドワンピースジョイントを説明する
接続部の断面図である。FIG. 3 is a cross-sectional view of a connecting portion illustrating a rubber molded one-piece joint.
【符号の説明】 １ａ，１ｂ ＣＶケーブル ２ 導体 ３ ケーブル絶縁体 ４ ケーブル絶縁体外部半導電層 ５ 導体接続管 ６ 導体接続部カバー １０ ゴムモールド筒状ユニット ２０ 拡径パイプ[Description of Signs] 1a, 1b CV cable 2 conductor 3 cable insulator 4 cable insulator outer semiconductive layer 5 conductor connection pipe 6 conductor connection portion cover 10 rubber molded cylindrical unit 20 expanded pipe
フロントページの続き (72)発明者 奥山 清一 千葉県富津市新富42−１ 株式会社フジク ラ富津事業所内 Ｆターム(参考） 4F211 AA45 AD05 AD12 AD18 AG03 AG14 AH35 SA11 SC01 SD04 SH30 SJ01 SJ13 SJ15 SJ22 SJ31 SP20 5G355 AA03 BA01 BA15 CA06 CA09 5G375 AA02 BA26 BB43 CA02 CA14 CB07 CB14 CB19 CB36 CB47 CB53 DB32 DB37 EA17 Continuing from the front page (72) Inventor Seiichi Okuyama 42-1 Shintomi, Futtsu-shi, Chiba F-term in Fujikura Futtsu Office (reference) 4F211 AA45 AD05 AD12 AD18 AG03 AG14 AH35 SA11 SC01 SD04 SH30 SJ01 SJ13 SJ15 SJ22 SJ31 SP20 5G355 AA03 BA01 BA15 CA06 CA09 5G375 AA02 BA26 BB43 CA02 CA14 CB07 CB14 CB19 CB36 CB47 CB53 DB32 DB37 EA17
Claims (1)
状ユニットを、その内径部にケーブル絶縁体外径より大
きな内径を有する拡径管を挿通して予め一方のケーブル
側に逃がしておき、ケーブル導体接続後にケーブル導体
接続部上に戻し、前記拡径管を引き抜くことにより前記
ゴムモールド筒状ユニットをその弾性力により収縮させ
てケーブル絶縁体外周上に挿着する接続部の組立におい
て、 上記ゴムモールド筒状ユニットの内径部に拡径管を挿通
する時には、ゴムモールド筒状ユニット内面及び拡径管
表面に１×１０４ｃｓｔクラスの高粘度潤滑油を塗布
し、ゴムモールド筒状ユニットをケーブル絶縁体外周上
に挿着する時には、ケーブル絶縁体表面に１×１０３ｃ
ｓｔクラスの低粘度潤滑油を塗布することを特徴とする
ゴムモールドワンピースジョイントの組立工法。When a power cable is connected, a rubber-molded cylindrical unit is inserted into an inner diameter portion of an expanded tube having an inner diameter larger than the outer diameter of a cable insulator, and is previously released to one of the cable sides, so that a cable conductor is inserted. In the assembling of the connecting portion which is returned on the cable conductor connecting portion after the connection and the expanded tube is pulled out, the rubber molded tubular unit is contracted by its elastic force and inserted on the outer periphery of the cable insulator. When the expanded tube is inserted into the inner diameter of the cylindrical unit, high viscosity lubricating oil of 1 × 10 4 cst class is applied to the inner surface of the rubber molded cylindrical unit and the surface of the expanded tube to insulate the rubber molded cylindrical unit. When inserted on the outer circumference of the body, 1 × 10 3 c
A method of assembling a rubber mold one-piece joint, characterized by applying a low viscosity lubricating oil of the st class.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000203654A JP2002027628A (en) | 2000-07-05 | 2000-07-05 | Assembly method for rubber-molded one-piece joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000203654A JP2002027628A (en) | 2000-07-05 | 2000-07-05 | Assembly method for rubber-molded one-piece joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002027628A true JP2002027628A (en) | 2002-01-25 |
Family
ID=18701032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000203654A Pending JP2002027628A (en) | 2000-07-05 | 2000-07-05 | Assembly method for rubber-molded one-piece joint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002027628A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9343893B2 (en) | 2011-05-20 | 2016-05-17 | 3M Innovative Properties Company | Device and method for field expansion |
| CN112186657A (en) * | 2020-10-13 | 2021-01-05 | 长缆电工科技股份有限公司 | Method for installing cable intermediate joint |
-
2000
- 2000-07-05 JP JP2000203654A patent/JP2002027628A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9343893B2 (en) | 2011-05-20 | 2016-05-17 | 3M Innovative Properties Company | Device and method for field expansion |
| CN112186657A (en) * | 2020-10-13 | 2021-01-05 | 长缆电工科技股份有限公司 | Method for installing cable intermediate joint |
| CN112186657B (en) * | 2020-10-13 | 2022-06-07 | 长缆电工科技股份有限公司 | Method for installing cable intermediate joint |
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