JP4265706B2 - Insulation cover covered compression sleeve - Google Patents

Insulation cover covered compression sleeve Download PDF

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Publication number
JP4265706B2
JP4265706B2 JP12837799A JP12837799A JP4265706B2 JP 4265706 B2 JP4265706 B2 JP 4265706B2 JP 12837799 A JP12837799 A JP 12837799A JP 12837799 A JP12837799 A JP 12837799A JP 4265706 B2 JP4265706 B2 JP 4265706B2
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Japan
Prior art keywords
sleeve
insulating cover
compression sleeve
electric wire
covering
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 - Fee Related
Application number
JP12837799A
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Japanese (ja)
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JP2000323199A (en
Inventor
克己 薮
純一 川島
義美 白川
浩紀 鹿野
孝義 森
文昭 石山
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Chubu Electric Power Co Inc
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Chubu Electric Power Co Inc
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Priority to JP12837799A priority Critical patent/JP4265706B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、被覆電線の接続に用いられる絶縁カバー被覆型圧縮スリーブに関する。
【0002】
【従来の技術】
従来、この種の絶縁カバー被覆型圧縮スリーブ(以下、「圧縮スリーブ」という)は、接続する被覆電線(以下、「電線」という)の芯線の材質と同種の銅製やアルミニウム製等の電気導体からなる金属製スリーブ本体(以下、「スリーブ本体」という)と、そのスリーブ本体の外周を覆うとともに、そのスリーブ本体からその長手方向の外方へ少し突出した電気絶縁材料からなる筒状の絶縁カバーとにより構成されている(例えば、特開平10−12290号公報)。
【0003】
このスリーブ本体は、電線の絶縁性の被覆を除去して現われた芯線を挿入できる開口部を両端側に有するチューブ状を呈し、それら開口部に電線の芯線を挿入した後、絶縁カバーの外側からスリーブ本体の外周を油圧シリンダーで駆動されるダイスを用いて圧縮すると、スリーブ本体の両側の電線の芯線が、スリーブ本体を介して物理的にも電気的にも接続される。
【0004】
【発明が解決しようとする課題】
上述のように、従来の圧縮スリーブは、スリーブ本体を圧縮することにより、容易に電線を接続できるという特長を有しているが、電線の接続後に、雨水が侵入したり、あるいは、シリコングリース等のコンパウンドが漏出しないようにするために、スリーブ本体から外方へ突出した絶縁カバー内にガスケットを必要としたり、あるいは、このようなガスケットを設けないときは、圧縮スリーブと電線との間を絶縁カバーや絶縁テープで被覆しなければならなかった。このため、従来の圧縮スリーブは、ガスケットの部品が増えてコスト高になったり、電線挿入の際に圧縮スリーブ内の空気が抜けづらく、電線が圧縮スリーブ内の空気圧により押し戻されて挿入しづらいという欠点があった。また、このようなガスケットを設けないときは、被覆作業を必要とするので、作業性に劣る欠点があった。
【0005】
そこで、本発明は、上記問題を解決するためになされたものであって、その目的は、安価に、しかも、簡単にコンパウンドの漏出と雨水の侵入とを効果的に防止することのできる圧縮スリーブを提供することにある。
【0006】
【課題を解決するための手段】
本発明は、上記目的を達成するために、電線の被覆を除去して現れた芯線を長手方向両側から挿入される金属製スリーブ本体と、その金属製スリーブ本体の外周を覆う被覆部及びその被覆部から軸方向両側に延長された突出部を一体に有する筒状の絶縁カバーとからなり、前記絶縁カバーの外側から圧縮力を加えられて、前記両側の電線を接続する絶縁カバー被覆型圧縮スリーブにおいて、前記突出部を、前記被覆の外径よりも大きい内径を有し、その内周面に条溝を有し、前記電線の被覆が除去されていない部分を挿通され、圧縮スリーブを圧縮するダイスにより圧縮されて前記被覆電線の被覆と固着されるように構成したことを特徴としている。
前記条溝は、螺旋状に形成されていることを特徴としている。
そして、前記突出部の内周は、スリーブ本体側よりも外側の方が内径が大きいラッパ状に形成されていることを特徴としている。
【0007】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。図1は一実施の形態に係る圧縮スリーブ1を長手方向の上半分を断面して示し、かつ、左側の端部を省略した正面図である。
【0008】
スリーブ本体2は、従来のスリーブ本体と同様に、銅製あるいはアルミニウム製等の電気導体の金属製からなる所定の長さを有するパイプから構成されている。そして、このスリーブ本体2の両端側には、電線Lの電気絶縁性の被覆L′を除去して現われた芯線L″が挿入される開口部2a,2b(左側の開口部2bは、図1で省略されている。なお、開口部2b側は、開口部2a側と同一構成なので、以下、開口部2a側のみで説明する。)がそれぞれ設けられているとともに、スリーブ本体2のほぼ中央部には、挿入された芯線L″の位置決め用の突起2cが設けられている。なお、図1では、スリーブ本体2の左側から挿入される電線Lは省略されている。
【0009】
絶縁カバー3は、スリーブ本体2の長手方向の外周全面を覆う筒状の被覆部3aと、スリーブ本体2の開口部2a側からスリーブ本体2の長手方向の外側へ所定長さをもって延長されている筒状の突出部3bとを一体に有して構成されている。そして、この絶縁カバー3は、電気絶縁性を有するとともに、被覆部3aの外側からスリーブ本体2を圧縮したときの力で破損しないように、その圧縮に十分に耐える材質で構成されている。このような材質としては、例えば、ポリエチレンやポリアセタール等の合成樹脂が使用できる。
【0010】
突出部3bの外径は、被覆部3aと等しく、その突出部3bの内径は、電線被覆の外径よりも少し大きく形成されている。したがって、スリーブ本体2に電線Lを挿入する場合には、スリーブ本体2内の空気がスムーズに抜けて、電線Lの挿入が容易になる。
【0011】
前記突出部3bの内壁3b′は、軸方向にストレートでもよいが、電線Lの芯線L″の挿入を容易にするために、内径がスリーブ本体2側よりも外側の方が大きいラッパ状に形成されている。このように、ラッパ状に形成した場合には、芯線L″が図1の二点鎖線の矢印方向からスリーブ本体2に挿入されるときに案内作用をするので、スリーブ本体2の開口部2aへ芯線L″を挿入する作業を活線工具やロボットのマニピュレータで行うときに特に有効である。
【0012】
図1中、4は条溝であって、突出部3bの内壁3b′に螺旋状に設けられている。この条溝4は、螺旋状でなく、独立した複数のリング状の条溝とすることもできる。しかし、図示のように螺旋状に形成したときは、絶縁カバー3を射出成形により製造するときに容易に形成することができる特長がある。
【0013】
図1中、点で示されるSは、圧縮スリーブ1を用いて電線Lを挿入する際に塗布されるシリコングリースである。このシリコングリースSは、スリーブ本体2内への芯線L″の挿入を容易にするとともに、後述の図2に示されるように、圧縮されたのちの水密状態を良好に保つことが可能となり、スリーブ本体2内への雨水の侵入を効果的に防止するとともに、端部の電気絶縁性の確保が可能となる。
【0014】
上記構成の圧縮スリーブ1で電線L同士を接続するには、先ず、電線Lの芯線L″が突出部3bを介してスリーブ本体1内に挿入される。そして、芯線L″がスリーブ本体2に挿入された後、図示しない油圧シリンダで駆動されるダイスを用いて圧縮される。この圧縮は、絶縁カバー3の被覆部3a及び突出部3bの外側から行われる。したがって、被覆部3aとスリーブ本体2、スリーブ本体2と芯線L″、及び、突出部3bと被覆L′は、図2に示されるように、ダイスが圧縮した部分がそれぞれ屈曲した状態となって、スリーブ本体2と芯線L″、及び、突出部3bと被覆L′がそれぞれ固着される。
【0015】
上述の圧縮の後、突出部3bの条溝4内のシリコングリースSは、そのまま条溝4内に保持される。したがって、電線Lの被覆L′と突出部3bの内壁3b′との間に雨水の侵入するのを効果的に防止することができる。また、シリコングリースSは、条溝4内に保持されるので外部へ漏出するのを効果的に防止することができる。
【0016】
【発明の効果】
本発明は、電線の被覆を除去して現れた芯線を長手方向両側から挿入される金属製スリーブ本体と、その金属製スリーブ本体の外周を覆う被覆部及びその被覆部から軸方向両側に延長された突出部とを一体に有する筒状の絶縁カバーとからなり、前記絶縁カバーの外側から圧縮力を加えられて、前記両側の電線を接続する絶縁カバー被覆型圧縮スリーブにおいて、前記突出部を、前記被覆の外径よりも大きい内径を有し、その内周面に条溝を有し、前記電線の被覆が除去されていない部分を挿通され、圧縮スリーブを圧縮するダイスにより圧縮されて前記電線の被覆と固着されるように構成した。従って、圧縮スリーブを圧縮する前は、電線の被覆の外径よりも突出部の内径の方が大きいため、電線を容易に挿入することができる。また、突出部の内周面に条溝を有するので、突出部を圧縮した後は、突出部と電線が密着することにより、シリコングリース等を保持できる密閉空間が形成され、シリコングリース等の外部への漏出を効果的に防止することができる。そして、ガスケット等を設けることなく、安価に、しかも、簡単にスリーブ本体内への雨水の侵入を効果的に防止することができる。また、スリーブ端部の電気絶縁性を確保することができる。
また、条溝を螺旋状に形成したときは、条溝を容易に形成することができる。
【図面の簡単な説明】
【図1】 本発明の一実施の形態に係る圧縮スリーブの長手方向の半分を断面で示し、かつ、左側を省略した正面図である。
【図2】 圧縮後の状態を示す参考図である。
【符号の説明】
1 絶縁カバー被覆型圧縮スリーブ(圧縮スリーブ)
2 圧縮スリーブ本体(スリーブ本体)
3 絶縁カバー
3a 被覆部
3b 突出部
3b′ 内壁
条溝
L 被覆電線(電線)
L′ 被覆
L″ 芯線
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an insulating cover covered compression sleeve used for connecting a covered electric wire.
[0002]
[Prior art]
Conventionally, this type of insulation cover-covered compression sleeve (hereinafter referred to as “compression sleeve”) is made of an electrical conductor such as copper or aluminum, which is the same type as the core wire material of the coated wire to be connected (hereinafter referred to as “wire”). A metal sleeve main body (hereinafter referred to as “sleeve main body”), and a cylindrical insulating cover made of an electrically insulating material that covers the outer periphery of the sleeve main body and slightly protrudes outward in the longitudinal direction from the sleeve main body. (For example, Japanese Patent Laid-Open No. 10-12290).
[0003]
This sleeve main body has a tube shape having openings on both end sides into which the core wire that appears after removing the insulating coating of the electric wire can be inserted, and after inserting the core wire of the electric wire into these openings, from the outside of the insulating cover When the outer periphery of the sleeve body is compressed using a die driven by a hydraulic cylinder, the cores of the electric wires on both sides of the sleeve body are physically and electrically connected via the sleeve body.
[0004]
[Problems to be solved by the invention]
As described above, the conventional compression sleeve has a feature that the electric wire can be easily connected by compressing the sleeve body. However, after the electric wire is connected, rainwater enters or silicon grease or the like In order to prevent leakage of this compound, a gasket is required in the insulating cover protruding outward from the sleeve body, or when such a gasket is not provided, the compression sleeve and the electric wire are insulated. It had to be covered with a cover or insulating tape. For this reason, the conventional compression sleeve is costly due to an increase in the number of gasket parts, and it is difficult for air in the compression sleeve to escape when the electric wire is inserted, and it is difficult to insert the electric wire by being pushed back by the air pressure in the compression sleeve. There were drawbacks. In addition, when such a gasket is not provided, a covering operation is required, so that there is a disadvantage that the workability is inferior.
[0005]
Accordingly, the present invention has been made to solve the above-described problem, and an object of the present invention is to provide a compression sleeve that can effectively prevent leakage of a compound and intrusion of rainwater at a low cost. Is to provide.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a metal sleeve main body into which a core wire that has been removed after the removal of the electric wire is inserted from both sides in the longitudinal direction, a covering portion that covers the outer periphery of the metal sleeve main body, and the covering thereof Insulating cover-covered compression sleeve that comprises a cylindrical insulating cover integrally having protrusions extending axially from both sides to connect the electric wires on both sides by applying a compressive force from the outside of the insulating cover The protrusion has an inner diameter larger than the outer diameter of the covering, has a groove on the inner peripheral surface thereof, is inserted through a portion where the covering of the electric wire is not removed, and compresses the compression sleeve It is characterized by being configured to be compressed by a die and fixed to the covering of the covered electric wire.
The said groove is formed in the helical form, It is characterized by the above-mentioned.
And the inner periphery of the said protrusion part is formed in the trumpet shape where an inner diameter is larger outside than the sleeve main body side.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a compression sleeve 1 according to an embodiment, showing a cross section of the upper half in the longitudinal direction and omitting the left end.
[0008]
The sleeve main body 2 is composed of a pipe having a predetermined length made of a metal such as copper or aluminum, like the conventional sleeve main body. Then, at both ends of the sleeve body 2, openings 2a and 2b (the left opening 2b is shown in FIG. 1) into which the core wire L ″ appearing after removing the electrically insulating coating L ′ of the electric wire L is inserted. In addition, since the opening 2b side has the same configuration as the opening 2a side, only the opening 2a side will be described below), and a substantially central portion of the sleeve body 2 is provided. Is provided with a protrusion 2c for positioning the inserted core wire L ″. In FIG. 1, the electric wire L inserted from the left side of the sleeve body 2 is omitted.
[0009]
The insulating cover 3 is extended with a predetermined length from the side of the opening 2a of the sleeve body 2 to the outside of the sleeve body 2 in the longitudinal direction, covering the entire outer periphery of the sleeve body 2 in the longitudinal direction. A cylindrical protrusion 3b is integrally formed. The insulating cover 3 is electrically insulating and is made of a material that can sufficiently withstand the compression so as not to be damaged by the force when the sleeve body 2 is compressed from the outside of the covering portion 3a. As such a material, for example, synthetic resins such as polyethylene and polyacetal can be used.
[0010]
The outer diameter of the protruding portion 3b is equal to the covering portion 3a, and the inner diameter of the protruding portion 3b is slightly larger than the outer diameter of the wire covering. Therefore, when the electric wire L is inserted into the sleeve main body 2, the air in the sleeve main body 2 is smoothly removed, and the electric wire L can be easily inserted.
[0011]
The inner wall 3b ′ of the protruding portion 3b may be straight in the axial direction, but in order to facilitate the insertion of the core wire L ″ of the electric wire L, it is formed in a trumpet shape whose inner diameter is larger on the outer side than the sleeve body 2 side. In this way, in the case of forming a trumpet, the core wire L ″ acts as a guide when being inserted into the sleeve body 2 from the direction of the arrow of the two-dot chain line in FIG. This is particularly effective when the operation of inserting the core wire L ″ into the opening 2a is performed with a live tool or a robot manipulator.
[0012]
In FIG. 1, reference numeral 4 denotes a groove, which is provided spirally on the inner wall 3b 'of the protruding portion 3b. The groove 4 is not spiral but can be a plurality of independent ring-shaped grooves. However, when it is formed in a spiral shape as shown in the figure, it has an advantage that it can be easily formed when the insulating cover 3 is manufactured by injection molding.
[0013]
In FIG. 1, S indicated by a dot is silicon grease applied when the electric wire L is inserted using the compression sleeve 1. The silicon grease S facilitates the insertion of the core wire L ″ into the sleeve body 2 and can maintain a good watertight state after being compressed, as shown in FIG. While effectively preventing rainwater from entering the main body 2, it is possible to ensure electrical insulation at the ends.
[0014]
In order to connect the electric wires L with the compression sleeve 1 having the above-described configuration, first, the core wire L ″ of the electric wire L is inserted into the sleeve main body 1 through the protruding portion 3b. After being inserted, it is compressed using a die driven by a hydraulic cylinder (not shown). This compression is performed from the outside of the covering portion 3a and the protruding portion 3b of the insulating cover 3. Therefore, as shown in FIG. 2, the covering portion 3a and the sleeve body 2, the sleeve body 2 and the core wire L ″, and the protruding portion 3b and the covering L ′ are in a state where the portions where the dies are compressed are bent. The sleeve body 2 and the core wire L ″, and the protruding portion 3b and the covering L ′ are fixed to each other.
[0015]
After the above-described compression, the silicon grease S in the groove 4 of the protrusion 3b is held in the groove 4 as it is. Therefore, it is possible to effectively prevent rainwater from entering between the covering L ′ of the electric wire L and the inner wall 3 b ′ of the protruding portion 3 b. Further, since the silicon grease S is held in the groove 4, it can be effectively prevented from leaking to the outside.
[0016]
【The invention's effect】
The present invention includes a metal sleeve main body into which a core wire appearing after removing a coating of an electric wire is inserted from both sides in a longitudinal direction, a covering portion covering the outer periphery of the metal sleeve main body, and extending from the covering portion to both axial sides. In the insulating cover-covered compression sleeve that connects the electric wires on both sides by applying a compressive force from the outside of the insulating cover, the protruding portion is The wire has an inner diameter larger than the outer diameter of the coating, has a groove on its inner peripheral surface, is inserted through a portion where the coating of the wire is not removed, and is compressed by a die that compresses a compression sleeve. It was comprised so that it might adhere to the coating | coated of. Therefore, before compressing the compression sleeve, the inner diameter of the protruding portion is larger than the outer diameter of the covering of the electric wire, so that the electric wire can be easily inserted. In addition, since the protrusion has a groove on the inner peripheral surface, after the protrusion is compressed, the protrusion and the electric wire come into close contact with each other to form a sealed space that can hold silicon grease or the like. Leakage into the water can be effectively prevented. In addition, it is possible to effectively prevent rainwater from entering the sleeve body easily and inexpensively without providing a gasket or the like. In addition, electrical insulation at the sleeve end can be ensured.
Also, when forming a groove in a spiral shape, it is possible to easily form the groove.
[Brief description of the drawings]
FIG. 1 is a front view showing a half in a longitudinal direction of a compression sleeve according to an embodiment of the present invention in a cross section and omitting the left side.
FIG. 2 is a reference diagram showing a state after compression.
[Explanation of symbols]
1 Insulation cover covered compression sleeve (compression sleeve)
2 Compression sleeve body (sleeve body)
3 Insulating cover 3a Covering part 3b Protruding part 3b 'Inner wall 4 Strip L Covered wire (electric wire)
L 'coating L "core wire

Claims (3)

被覆電線の被覆を除去して現れた芯線を長手方向両側から挿入される金属製スリーブ本体と、その金属製スリーブ本体の外周を覆う被覆部及びその被覆部から軸方向両側に延長された突出部を一体に有する筒状の絶縁カバーとからなり、前記絶縁カバーの外側から圧縮力を加えられて、前記両側の被覆電線を接続する絶縁カバー被覆型圧縮スリーブにおいて、
前記突出部は、
前記電線被覆の外径よりも大きい内径を有し、
その内周面に条溝を有し、
前記被覆電線の被覆が除去されていない部分を挿通され、
圧縮スリーブを圧縮するダイスにより圧縮されて前記被覆電線の被覆と固着されるものである、
ことを特徴とする絶縁カバー被覆型圧縮スリーブ。
A metal sleeve body which is inserted a core which appeared to remove the coating of the coated wire from both longitudinal sides, are extended in the axial direction on both sides from the covering portion and the coating portion will covering the outer periphery of the metal sleeve body the projecting portion consists of a tubular insulating cover having integral, is applied a compressive force from the outside of the insulating cover, the insulating cover-coated compression sleeve that connects the two sides of the covered electric wire,
The protrusion is
Having an inner diameter greater than the outer diameter of the wire coating;
It has a groove on its inner peripheral surface,
The portion of the covered electric wire that has not been removed is inserted,
The compression sleeve is compressed by a die for compressing and is fixed to the covering of the covered electric wire.
An insulating cover-covered compression sleeve.
条溝は、螺旋状に形成されていることを特徴とする請求項1記載の絶縁カバー被覆型圧縮スリーブ。 2. The insulating cover-covered compression sleeve according to claim 1, wherein the groove is formed in a spiral shape. 突出部の内周は、スリーブ本体側よりも外側の方が内径が大きいラッパ状に形成されていることを特徴とする請求項1又は2記載の絶縁カバー被覆型圧縮スリーブ。3. The insulating cover-covered compression sleeve according to claim 1, wherein the inner periphery of the projecting portion is formed in a trumpet shape having a larger inner diameter on the outer side than on the sleeve body side.
JP12837799A 1999-05-10 1999-05-10 Insulation cover covered compression sleeve Expired - Fee Related JP4265706B2 (en)

Priority Applications (1)

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JP2002025642A (en) * 2000-07-13 2002-01-25 Asahi Tec Corp Insulation cover sheathed type crimping sleeve
JP4708486B2 (en) * 2009-05-15 2011-06-22 旭電機株式会社 Compression connection method of electric wire and compression sleeve

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