JP5203112B2 - Ground wire lead-out portion from power cable and power cable connecting portion provided with this ground wire lead-out portion - Google Patents

Ground wire lead-out portion from power cable and power cable connecting portion provided with this ground wire lead-out portion Download PDF

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JP5203112B2
JP5203112B2 JP2008240434A JP2008240434A JP5203112B2 JP 5203112 B2 JP5203112 B2 JP 5203112B2 JP 2008240434 A JP2008240434 A JP 2008240434A JP 2008240434 A JP2008240434 A JP 2008240434A JP 5203112 B2 JP5203112 B2 JP 5203112B2
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ground wire
wire lead
fitting
power cable
layer
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JP2009095226A (en
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規昭 堀口
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THE FURUKAW ELECTRIC CO., LTD.
Fujikura Ltd
Viscas Corp
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THE FURUKAW ELECTRIC CO., LTD.
Fujikura Ltd
Viscas Corp
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Description

本発明は、電力ケーブルの遮蔽層から導出されたシールド導体に接地線を電気的に接続して該接地線を外部に引き出す接地線引出部及びこの接地線引出部を備えた電力ケーブル接続部に関するものである。   The present invention relates to a ground wire lead portion that electrically connects a ground wire to a shield conductor derived from a shield layer of a power cable and draws the ground wire to the outside, and a power cable connection portion including the ground wire lead portion. Is.

電力ケーブルから接地線を引き出す接地線引出部の構造として、特許文献１に示されたものが知られている。特許文献１に示された接地線引出部の構造は図２０に示した通りである。この接地線引出部を構成する場合には、先ず電力ケーブル１を段剥ぎすることにより絶縁シース１ａから遮蔽層１ｂと外部半導電層１ｃと絶縁体１ｄとを露呈させ、ケーブル１を同様に段剥ぎされた他のケーブルと突き合わせてケーブル接続部本体２を構成する。次いで、図２１に示すように接地線３が半田付けされた金属板４を、遮蔽層１ｂの外周に嵌合させた後、金属板４と、電力ケーブルのシース１ａの一部と、遮蔽層１ｂの露呈された部分と、外部半導電層１ｃの露呈された部分と、絶縁体１ｄの一部とを覆うようにカバー５を取り付け、カバー５に設けられた分岐管部５ａを通して接地線３を外部に引き出す。   As a structure of a ground wire lead-out portion that pulls out a ground wire from a power cable, a structure shown in Patent Document 1 is known. The structure of the ground wire lead-out portion shown in Patent Document 1 is as shown in FIG. In the case of constituting the ground wire lead portion, the power cable 1 is first stripped to expose the shielding layer 1b, the external semiconductive layer 1c, and the insulator 1d from the insulating sheath 1a, and the cable 1 is similarly stepped. The cable connecting part main body 2 is configured by being brought into contact with the other cables peeled off. Next, as shown in FIG. 21, after the metal plate 4 to which the ground wire 3 is soldered is fitted to the outer periphery of the shielding layer 1b, the metal plate 4, a part of the sheath 1a of the power cable, and the shielding layer The cover 5 is attached so as to cover the exposed portion 1b, the exposed portion of the external semiconductive layer 1c, and a part of the insulator 1d, and the grounding wire 3 passes through the branch pipe portion 5a provided in the cover 5. Pull out to the outside.

また特許文献２には、電力ケーブルの遮蔽層を、電力ケーブルの絶縁シースの外周に固定されたアダプタを通して絶縁被覆線からなる接地線に接続して、該接地線を外部に引き出す接地線引出部の構造が示されている。特許文献２に示された接地線引出部で用いているアダプタは、絶縁被覆線からなる接地線の芯線と軟銅撚り線とを、途中に隔壁を有する防水形のスリーブを介して接続して、接地線の絶縁被覆と防水形スリーブとを覆うように、柔軟性を有する軟質ビニル樹脂で防水モールド部を成形した構造を有する。特許文献２に示された接地線引出部においては、このアダプタを電力ケーブルの絶縁シースの外周に接着し、軟銅撚り線を電力ケーブルの遮蔽層に半田付けした後、アダプタと電力ケーブル接続部とを覆うように防水テープを巻回して防水処理を施している。
特開平８−１９１５３５号公報 実開平６−１３３４４号公報 Further, in Patent Document 2, a shield layer of a power cable is connected to a ground wire made of an insulation-coated wire through an adapter fixed to the outer periphery of the insulation sheath of the power cable, and a ground wire lead-out portion that draws the ground wire to the outside The structure of is shown. The adapter used in the ground wire lead-out portion shown in Patent Document 2 connects the core wire of the ground wire made of an insulation coated wire and the annealed copper stranded wire via a waterproof sleeve having a partition wall in the middle, It has a structure in which a waterproof mold part is molded with a soft vinyl resin having flexibility so as to cover the insulating coating of the ground wire and the waterproof sleeve. In the ground wire lead-out portion shown in Patent Document 2, the adapter is bonded to the outer periphery of the insulating sheath of the power cable, and the annealed copper stranded wire is soldered to the shielding layer of the power cable. A waterproof tape is wound around it so as to cover it.
JP-A-8-191535 Japanese Utility Model Publication No. 6-13344

図２０に示された接地線引出部において、カバー５として熱収縮性のものを用いれば、接地線引出部に遮水性を持たせることができる。しかし、使用環境が厳しい場合には、長年の使用により、接地線３と分岐管部５ａとの間に隙間が生じて遮水性能が低下するおそれがある。万一接地線の引出部から電力ケーブル接続部に水が浸入すると、接続部で絶縁破壊が生じるおそれがある。電力ケーブルの接続部に水が浸入するのを防ぐためには、接地線引出部の遮水性能を確実なものにしておくことが必要である。   In the ground wire drawing portion shown in FIG. 20, if a heat-shrinkable cover 5 is used, the ground wire drawing portion can be provided with water shielding properties. However, when the use environment is severe, there is a possibility that a gap is generated between the ground wire 3 and the branch pipe portion 5a due to long-term use, and the water shielding performance is deteriorated. In the unlikely event that water enters the power cable connecting portion from the lead-out portion of the ground wire, there is a risk of dielectric breakdown at the connecting portion. In order to prevent water from entering the connecting portion of the power cable, it is necessary to ensure the water shielding performance of the ground wire lead portion.

電力ケーブル接続部の防水性能については、数十年間の設計寿命が求められる。従来の接地線引出構造でも、環境によりある程度の遮水性能を維持することができるが、従来より厳しい仕様が求められる場所では、更に長期間に亘って性能の維持が求められることが予想される。従って、遮水性能を従来より向上させた接地線引出部の開発が望まれている。   A design life of several decades is required for the waterproof performance of the power cable connection. Even with the conventional ground wire lead-out structure, it is possible to maintain a certain level of water shielding performance depending on the environment, but in places where stricter specifications are required than before, it is expected that performance maintenance will be required for a longer period of time. . Therefore, it is desired to develop a ground wire lead portion with improved water shielding performance than before.

特に常時水没する場所や、降雨時に大量の水が流入することがある地下溝内等に電力ケーブルが敷設される場合には、電力ケーブルからの接地線引出部の遮水性能に特に配慮する必要がある。   Special consideration should be given to the water shielding performance of the ground wire lead-out part from the power cable, especially when the power cable is installed in a place where it is always submerged, or in an underground ditch where a large amount of water may flow in during rainfall. There is.

特許文献２に示された接地線引出部で用いるアダプタは、接地線と防水スリーブとが防水モールド部を貫通しているため、同アダプタを用いて接地線引出部を構成した場合には、接地線及び防水スリーブと防水モールド部との接着強度が十分でない場合や、防水モールド部が熱膨張収縮を繰り返して、接地線と防水スリーブの貫通部分と防水スリーブとの間に隙間が生じた場合に、接地線及び防水スリーブの貫通部分を通して水が浸入おそれがある。   In the adapter used in the ground wire lead-out portion shown in Patent Document 2, since the ground wire and the waterproof sleeve pass through the waterproof mold portion, when the ground wire lead-out portion is configured using the adapter, When the adhesive strength between the wire and the waterproof sleeve and the waterproof mold part is insufficient, or when the waterproof mold part repeats thermal expansion and contraction, and there is a gap between the ground wire and the penetration part of the waterproof sleeve and the waterproof sleeve In addition, water may enter through the ground wire and the penetration portion of the waterproof sleeve.

また特許文献２に示されたアダプタでは、予め接地線を防水モールド部によりモールドしておく必要があるため、接地線の長さが決まってしまい、融通性に乏しいという問題もあった。   Moreover, in the adapter shown in Patent Document 2, since the ground wire needs to be molded in advance by the waterproof mold portion, the length of the ground wire is determined and there is a problem that flexibility is poor.

本発明の目的は、遮水性能を従来よりも向上させて、信頼性を向上させた電力ケーブルからの接地線引出部及び該接地線引出部を備えた電力ケーブル接続部を提供することにある。   An object of the present invention is to provide a ground wire lead-out portion from a power cable with improved water shielding performance and improved reliability, and a power cable connecting portion including the ground wire lead-out portion. .

本発明は、電力ケーブルの遮蔽層から導出されたシールド導体に接地線を電気的に接続して該接地線を外部に引き出す接地線引出部に係わるものである。   The present invention relates to a ground wire lead-out portion that electrically connects a ground wire to a shield conductor derived from a shielding layer of a power cable and draws the ground wire to the outside.

本発明においては、電力ケーブルの軸線に沿う方向に一定の長さを有し、電力ケーブルの絶縁シースの外周に沿うように湾曲した凹面を外面の一部に有するとともに、該凹面の反対側の部分の外面が湾曲した凸面となっている接地線引出金具が設けられる。この接地線引出金具は、その一端を電力ケーブルのシールド導体導出部に向け、かつ凹面を電力ケーブルの絶縁シースの外周にシール層を介して当接させた状態で電力ケーブルのシールド導体導出部付近に配置される。電力ケーブルの遮蔽層から導出されたシールド導体が接地線引出金具の一端に電気的に接続され、接地線引出金具の外面の少なくとも一部と、電力ケーブルのシールド導体導出部付近の外面とを含む要被覆部を一括して被覆する被覆層が設けられて、該被覆層と前記接地線引出金具とにより、電力ケーブルのシールド導体導出部側の領域と接地線が引き出される側の領域との間の遮水が図られる。外部に引き出される接地線は上記接地線引出金具の他端側に接続される。   In the present invention, the power cable has a certain length in the direction along the axis of the power cable, and has a concave surface curved along the outer periphery of the insulation sheath of the power cable in a part of the outer surface, and on the opposite side of the concave surface. A ground wire lead-out fitting is provided in which the outer surface of the portion is a curved convex surface. This grounding lead wire fitting is near the shield conductor lead-out portion of the power cable with one end facing the shield conductor lead-out portion of the power cable and the concave surface in contact with the outer periphery of the insulation sheath of the power cable via the seal layer Placed in. The shield conductor derived from the shield layer of the power cable is electrically connected to one end of the ground wire lead fitting, and includes at least a part of the outer surface of the ground wire lead fitting and the outer surface near the shield conductor lead-out portion of the power cable. A covering layer is provided to collectively cover the necessary covering portion, and the shield layer and the grounding wire lead-out fitting provide a space between the region on the shield conductor lead-out portion side of the power cable and the region on the side from which the grounding wire is drawn. Water shielding is planned. A ground wire led out to the outside is connected to the other end side of the ground wire lead fitting.

被覆層は、収縮性のものであることが好ましい。収縮性の被覆層は、熱収縮性を有するものからなっていても良く、それ自体が弾性を有して常温で収縮する性質（常温収縮性）を有するもの（例えば、要被覆部の外径よりも小さい内径を有するゴムチューブ）からなっていても良い。   The coating layer is preferably shrinkable. The shrinkable coating layer may be made of a material having heat shrinkability, and has a property of being elastic and shrinking at room temperature (room temperature shrinkability) (for example, the outer diameter of the required coating portion). Rubber tube having a smaller inner diameter).

上記のように、ケーブルの軸線方向に一定の長さを有する接地線引出金具の凹面を電力ケーブルの絶縁シースの外周にシール層を介して面接触させて、この接地線引出金具を通して、接地線とケーブルの遮蔽層から導出されたシールド導体とを接続する構造にしておくと、電力ケーブルの絶縁シースと接地線引出金具とをシール層を介して広い面積で接触させて、接地線引出金具と電力ケーブルの絶縁シースとの間を通して水が流れるのを確実に阻止することができる。   As described above, the concave surface of the ground wire lead fitting having a certain length in the axial direction of the cable is brought into surface contact with the outer periphery of the insulation sheath of the power cable through the seal layer, and the ground wire is passed through the ground wire lead fitting. And a shield conductor derived from the shield layer of the cable, the insulation sheath of the power cable and the ground wire lead fitting are brought into contact with each other over a wide area through the seal layer, and the ground wire lead fitting and Water can be reliably prevented from flowing between the insulating sheath of the power cable.

また上記のように構成すると、要被覆部を一括して被覆する収縮性の被覆層が、接地線に比べてはるかに大きい外表面積を有する接地線引出金具の外面に面接触するので、該被覆層と接地線引出金具との間を通して水が流れるのを確実に阻止することができる。   In addition, when configured as described above, the shrinkable coating layer that collectively covers the required coating portion comes into surface contact with the outer surface of the ground wire lead fitting having a much larger outer surface area than the ground wire. It is possible to reliably prevent water from flowing between the layer and the ground wire lead fitting.

従って、上記のように構成すると、電力ケーブルのシールド導体導出部側の領域と接地線が引き出される側の領域との間の遮水を確実に図ることができ、接地線引出部の遮水性能を向上させることができる。   Therefore, if comprised as mentioned above, the water shielding between the area | region of the shield conductor derivation | leading-out side of a power cable and the area | region where the grounding wire is drawn out can be aimed at reliably, and the water shielding performance of a grounding wire extraction part Can be improved.

本発明の好ましい態様では、上記シール層が、柔軟性及び（又は）弾性を有するシール材からなるシートからなっている。   In a preferred aspect of the present invention, the sealing layer is made of a sheet made of a sealing material having flexibility and / or elasticity.

柔軟性及び（又は）弾性を有するシール材のシートによりシール層を形成すると、該シール層を電力ケーブルの絶縁シースの表面と接地線引出金具の表面とに良く馴染ませて、接地線引出金具とケーブルの絶縁シースとの間のシールを確実に図ることができる。またシート状のシール材を用いると、ケーブルの絶縁シースの上にシール材を載せてその上に接地線引出金具を載せるだけで、ケーブルの絶縁シースと接地線引出金具との間にシール材を介在させることができるため、ケーブルの絶縁シースと接地線引出金具との間をシールする作業を簡単にすることができる。   When the sealing layer is formed by a sheet of sealing material having flexibility and / or elasticity, the sealing layer is well adapted to the surface of the insulating sheath of the power cable and the surface of the grounding wire lead fitting, A seal between the cable and the insulation sheath can be ensured. In addition, when a sheet-like sealing material is used, the sealing material is placed between the cable insulation sheath and the ground wire lead fitting only by placing the sealing material on the cable insulation sheath and placing the ground wire lead fitting thereon. Since it can be interposed, the work of sealing between the insulation sheath of the cable and the ground wire lead fitting can be simplified.

本発明の好ましい態様では、前記シール層が、接地線引出金具の凹面を取り囲む周縁部から外側にはみ出す大きさを有し、接地線引出金具の周縁部の全体に亘って、かつ接地線引出金具とシール層の表面との間に跨って、シール用テープが貼り付けられて接地線引出金具とシール層の表面との間が液密にシールされる。シール用テープは、接地線引出金具に接着する接着性とシール層に融着する融着性とを有するものであることが好ましい。   In a preferred aspect of the present invention, the seal layer has a size that protrudes outward from a peripheral portion surrounding the concave surface of the ground wire lead fitting, and extends over the entire peripheral portion of the ground wire lead fitting. A sealing tape is applied across the surface of the sealing layer and the surface of the sealing layer is liquid-tightly sealed between the ground wire lead fitting and the surface of the sealing layer. It is preferable that the sealing tape has adhesiveness for adhering to the ground wire lead fitting and fusing property for fusing to the sealing layer.

上記のように、シール層が、接地線引出金具の凹面を取り囲む周縁部から外側にはみ出す大きさを有するようにしておいて、接地線引出金具とシール層の表面との間を液密にシールするようにシール用テープを貼り付けておくと、接地線引出部の遮水性を向上させることができる。   As described above, the seal layer has a size that protrudes outward from the peripheral edge surrounding the concave surface of the ground wire lead fitting, and the space between the ground wire lead fitting and the surface of the seal layer is liquid-tightly sealed. If the sealing tape is pasted in such a manner, the water shielding property of the ground wire lead portion can be improved.

本発明の好ましい態様では、接地線引出金具の凸面を覆う防食層が形成される。防食層は、例えばポリ塩化ビニル樹脂等の防食性を有する樹脂製のコーティング材料により形成するのが好ましい。   In the preferable aspect of this invention, the anticorrosion layer which covers the convex surface of a grounding wire drawing | extracting metal fitting is formed. The anticorrosion layer is preferably formed of a coating material made of a resin having anticorrosion properties such as a polyvinyl chloride resin.

上記のように、接地線引出金具の凸面を防食層で覆っておくと、接地線引出金具の耐食性を高めることができる。   As described above, when the convex surface of the ground wire lead fitting is covered with the anticorrosion layer, the corrosion resistance of the ground wire lead fitting can be enhanced.

上記のように接地線引出金具の凸面を防食層で覆った場合、接地線引出金具の凹面と凸面との境界部を接地線引出金具の長手方向に沿って伸びる防食層の端縁部と、シール層との間にシール材が入りにくい、奥深い狭間隙が形成され、この狭間隙が、接地線引出金具とシール層との間のシールの盲点となるおそれが生じる。   When the convex surface of the ground wire lead fitting is covered with the anticorrosion layer as described above, the edge portion of the anticorrosion layer that extends along the longitudinal direction of the ground wire lead fitting, the boundary portion between the concave surface and the convex surface of the ground wire lead fitting, A deep narrow gap is formed between the seal layer and the seal material, and the narrow gap is likely to become a blind spot of the seal between the ground wire lead fitting and the seal layer.

そこで、本発明の好ましい態様では、上記のように接地線引出金具の凸面を防食層で覆う場合に、接地線引出金具の凹面と凸面との境界部を接地線引出金具の長手方向に沿って伸びる防食層の端縁部が、先端側ほど薄くなるように斜めに面取りされる。   Therefore, in a preferred aspect of the present invention, when the convex surface of the ground wire lead fitting is covered with the anticorrosion layer as described above, the boundary portion between the concave surface and the convex surface of the ground wire lead fitting is along the longitudinal direction of the ground wire lead fitting. The edge part of the extending anticorrosion layer is chamfered obliquely so that the tip side becomes thinner.

上記のように、接地線引出金具の凹面と凸面との境界部を接地線引出金具の長手方向に沿って伸びる防食層の端縁部を斜めに面取りしておくと、接地線引出金具の凹面と凸面との境界部（接地線引出金具の幅方向の両端部）とケーブルの絶縁シース外面との間に奥深い狭隙間が形成されて該狭間隙がシールの盲点となるのを防ぐことができるため、遮水信頼性を向上させることができる。   As described above, when the edge of the anticorrosion layer extending along the longitudinal direction of the ground wire lead fitting is obliquely chamfered at the boundary between the concave surface and the convex surface of the ground wire lead fitting, the concave surface of the ground wire lead fitting A deep narrow gap is formed between the boundary portion between the cable and the convex surface (both ends in the width direction of the ground wire lead fitting) and the outer surface of the insulation sheath of the cable, and the narrow gap can be prevented from becoming a blind spot of the seal. Therefore, the water shielding reliability can be improved.

上記シール層は、接着性を有するシール材からなっていることが好ましい。また、上記接地線引出金具は、その量産性を高めるために、銅等の良導電性を有する金属からなる鋳造品とすることが好ましい。この場合、接地線引出金具の凹面を鋳物肌のままとしておく（研磨しないでおく）ことが好ましい。   The seal layer is preferably made of a sealing material having adhesiveness. The ground wire lead fitting is preferably a cast product made of a metal having good conductivity such as copper in order to increase the mass productivity. In this case, it is preferable that the concave surface of the ground wire lead fitting is left as cast skin (not polished).

上記のように、接地線引出金具を鋳造品として、その凹面を鋳物肌のままにしておくと、接地線引出金具とシール材との接着性を良好にすることができる。   As described above, when the ground wire lead metal fitting is used as a cast product and the concave surface is left as cast skin, the adhesion between the ground wire lead metal fitting and the sealing material can be improved.

本発明の好ましい態様においては、接地線引出金具の一端寄りの一部の肉厚を薄くすることにより接地線引出金具の一端側に前記凸面の頂部に対して段差を有するシールド導体接続部が形成され、該シールド導体接続部に電力ケーブルの遮蔽層から導出されたシールド導体が接続される。   In a preferred aspect of the present invention, a shield conductor connecting portion having a step with respect to the top of the convex surface is formed on one end side of the ground wire lead metal fitting by thinning a part of the thickness near one end of the ground wire lead metal fitting. Then, a shield conductor derived from the shield layer of the power cable is connected to the shield conductor connection portion.

上記のように、接地線引出金具の一端寄りに凸面の頂部に対して段差を有するシールド導体接続部を形成して、該シールド導体接続部に電力ケーブルの遮蔽層から導出されたシールド導体を接続するようにすると、シールド導体と接地線引出金具との接続部が接地線引出金具の凸面上にはみ出すのを防ぐことができるため、被覆層を形成する際にシールド導体と接地線引出金具との接続部が障害になるのを防ぐことができる。   As described above, a shield conductor connection portion having a step with respect to the top of the convex surface is formed near one end of the ground wire lead fitting, and the shield conductor derived from the shielding layer of the power cable is connected to the shield conductor connection portion. By doing so, it is possible to prevent the connecting portion between the shield conductor and the ground wire lead fitting from protruding on the convex surface of the ground wire lead fitting. It is possible to prevent the connection portion from becoming an obstacle.

本発明の他の好ましい態様では、電力ケーブルの遮蔽層から導出されたシールド導体が、接地線引出金具の一端の端面に開口するようにして接地線引出金具に形成された孔を用いて接地線引出金具に電気的に接続される。シールド導体は直接又は接続導体を介して接地線引出金具と接続される。これらと接地線引出金具との電気的な接続は溶接やろう付けなどにより行うことができる。   In another preferred aspect of the present invention, the ground wire is formed by using a hole formed in the ground wire lead fitting so that the shield conductor led out from the shielding layer of the power cable opens at one end face of the ground wire lead fitting. Electrically connected to the drawer fitting. The shield conductor is connected to the ground wire lead fitting directly or via a connecting conductor. These can be electrically connected to the ground wire lead fitting by welding or brazing.

上記のように構成した場合にも、シールド導体と接地線引出金具との接続部が接地線引出金具の凸面上にはみ出すことがないため、被覆層を形成する際にシールド導体と接地線引出金具との接続部が障害になるのを防ぐことができる。   Even when configured as described above, the connecting portion between the shield conductor and the ground wire lead fitting does not protrude on the convex surface of the ground wire lead fitting. It is possible to prevent the connection part from becoming an obstacle.

本発明の好ましい態様では、接地線引出金具の他端寄りの一部の肉厚を薄くすることにより接地線引出金具の他端側に前記凸面の頂部に対して段差を有する接地線接続導体接続部が形成されて、該接地線接続導体接続部に接地線が電気的に接続される。   In a preferred aspect of the present invention, a ground wire connecting conductor connection having a step with respect to the top of the convex surface on the other end side of the ground wire lead metal fitting by reducing the thickness of a part near the other end of the ground wire lead metal fitting. Is formed, and the ground wire is electrically connected to the ground wire connecting conductor connecting portion.

上記のように、接地線引出金具の他端寄りに凸面の頂部に対して段差を有する接地線接続導体接続部を形成して、該接地線接続導体接続部に接地線を直接又は接続導体を介して接続する構造にすると、接地線と接地線引出金具との接続部が接地線引出金具の凸面上にはみ出すのを防ぐことができるため、被覆層を形成する際に接地線と接地線引出金具との接続部が障害になるのを防ぐことができる。   As described above, the ground wire connecting conductor connecting portion having a step with respect to the top of the convex surface is formed near the other end of the ground wire drawing metal fitting, and the ground wire is directly or directly connected to the ground wire connecting conductor connecting portion. When connecting to the ground wire, it is possible to prevent the connection portion between the ground wire and the ground wire lead fitting from protruding on the convex surface of the ground wire lead fitting. It can prevent that the connection part with a metal fitting becomes an obstruction.

本発明の他の好ましい態様では、接地線引出金具の他端の端面に開口するようにして接地線引出金具に形成された孔を用いて接地線が接地線引出金具に電気的に接続される。   In another preferred aspect of the present invention, the ground wire is electrically connected to the ground wire lead fitting using a hole formed in the ground wire lead fitting so as to open at the other end face of the ground wire lead fitting. .

上記のように構成した場合も、接地線と接地線引出金具との接続部が接地線引出金具の凸面上にはみ出すことがないため、被覆層を形成する際に接地線接続導体と接地線引出金具との接続部が障害になるのを防ぐことができる。   Even when configured as described above, the connecting portion between the ground wire and the ground wire lead fitting does not protrude on the convex surface of the ground wire lead fitting. It can prevent that the connection part with a metal fitting becomes an obstruction.

本発明の好ましい態様では、上記接地線引出金具が、前記凹面を外面に有する遮水壁部と、外面が前記凸面となっている外周側壁部とを一体に有する中空の金属部材と該金属部材の長手方向の両端で該金属部材の中空部を閉じる端部材とからなっている。この場合、シールド導体は、接地線引出金具の長手方向の一端側の端部材に電気的に接続される。また接地線引出金具の長手方向の他端側の端部材に接地線が電気的に接続される。   In a preferred aspect of the present invention, the grounding wire lead metal fitting has a hollow metal member integrally including a water shielding wall portion having the concave surface on the outer surface and an outer peripheral side wall portion having the convex surface on the outer surface, and the metal member. The end member closes the hollow portion of the metal member at both ends in the longitudinal direction. In this case, the shield conductor is electrically connected to an end member on one end side in the longitudinal direction of the ground wire lead fitting. Further, the ground wire is electrically connected to the end member on the other end side in the longitudinal direction of the ground wire lead metal fitting.

上記中空の金属部材は、例えば、金属パイプを適当な長さに切断して、該適当な長さの金属パイプをプレス加工などにより変形させることにより低コストで製作することができる。   The hollow metal member can be manufactured at a low cost by, for example, cutting a metal pipe into an appropriate length and deforming the metal pipe with an appropriate length by pressing or the like.

上記のように、接地線引出金具を中空に形成すると、該接地線引出金具を形成する導電材料を節約して、コストの低減を図ることができる。また上記のように接地線引出金具を中空に形成すると、接地線引出金具の軽量化を図ることができるため、接地線引出部を形成する際の作業性を向上させることができる。   As described above, when the ground wire lead fitting is formed in a hollow shape, the conductive material forming the ground wire lead fitting can be saved, and the cost can be reduced. Further, if the ground wire lead fitting is formed hollow as described above, the weight of the ground wire lead fitting can be reduced, so that the workability when forming the ground wire lead portion can be improved.

本発明の好ましい態様では、接地線引出金具が、前記凹面を外面に有する遮水壁部と、外面が前記凸面となっている外周側壁部とを一体に有する中空の金属部材により構成されて、接地線引出金具の一端寄りの部分が縮小されることにより管状のシールド導体圧着部が形成され、該シールド導体圧着部の内側にシールド導体が電気的に接続される。   In a preferred aspect of the present invention, the ground wire lead fitting is constituted by a hollow metal member integrally having a water shielding wall portion having the concave surface on the outer surface and an outer peripheral side wall portion having the convex surface on the outer surface, The portion near the one end of the ground wire lead fitting is reduced to form a tubular shield conductor crimping portion, and the shield conductor is electrically connected to the inside of the shield conductor crimping portion.

本発明の他の好ましい態様では、接地線引出金具が、前記凹面を外面に有する遮水壁部と、外面が前記凸面となっている外周側壁部とを一体に有する中空の金属部材により構成されて、接地線引出金具の他端寄りの部分が縮小されることにより管状の接地線接続導体圧着部が形成され、該接地線接続導体圧着部に接地線接が電気的に接続される。   In another preferred aspect of the present invention, the ground wire lead fitting is constituted by a hollow metal member integrally including a water shielding wall portion having the concave surface on the outer surface and an outer peripheral side wall portion having the convex surface on the outer surface. Then, the portion near the other end of the ground wire lead fitting is reduced to form a tubular ground wire connecting conductor crimping portion, and the ground wire contact is electrically connected to the ground wire connecting conductor crimping portion.

上記のように、凹面及び凸面を有する中空の金属部材により接地線引出金具を構成する場合に、該接地線引出金具の一端側及び他端側にそれぞれ管状のシールド導体圧着部及び接地線接続導体圧着部を形成し、これらの圧着部にそれぞれシールド導体及び接地線を電気的に接続するように構成すると、接地線引出金具とシールド導体との接続及び接地線引出金具と接地線との接続を簡単に行うことができる。   As described above, when the ground wire lead fitting is constituted by a hollow metal member having a concave surface and a convex surface, a tubular shield conductor crimping portion and a ground wire connecting conductor are respectively provided at one end side and the other end side of the ground wire lead fitting. By forming crimping parts and electrically connecting the shield conductor and grounding wire to each of these crimping parts, the connection between the grounding lead wire and the shield conductor and the connection between the grounding wire lead and the grounding wire It can be done easily.

本発明の好ましい態様では、被覆層で被覆された接地線引出金具と電力ケーブルとを一括して収容し得る形状及び大きさを有する筒部の底部から電力ケーブルを貫通させ得る大きさの第１の分岐管部と接地線又は接地線を接地線引出金具に接続する接続導体を貫通させ得る大きさの第２の分岐管部とを突出させた構造を有する分岐管ユニットが設けられる。この分岐管ユニットは、その筒部内に接地線引出金具を電力ケーブル及び被覆層の一部とともに収容し、電力ケーブルの接地線引出金具よりも接地線側に位置する部分を第１の分岐管部内を通して外部に導出するとともに、接地線又は接続導体を第２の分岐管内を通して外部に導出した状態で電力ケーブルの接地線引出金具が配置された部分に装着され、分岐管ユニットの筒部と被覆層との間の防水を図る防水層と、第１の分岐管部とここから導出された電力ケーブルとの間の防水を図る防水層と、第２の分岐管部とここから導出された接地線接続導体との間の防水を図る防水層とが形成される。   In a preferred aspect of the present invention, the first power cable having a shape capable of penetrating the power cable from the bottom of the cylindrical portion having a shape and a size capable of collectively housing the ground wire lead fitting and the power cable covered with the coating layer. A branch pipe unit having a structure in which the branch pipe portion and a second branch pipe portion having a size capable of penetrating a connecting conductor that connects the ground wire or the ground wire to the ground wire lead fitting are provided. In this branch pipe unit, the ground wire lead fitting is housed in the cylindrical portion together with the power cable and a part of the covering layer, and the portion of the power cable located on the ground line side from the ground wire lead fitting is in the first branch pipe portion. And is attached to the portion where the ground wire lead metal fitting of the power cable is arranged in a state where the ground wire or the connecting conductor is led outside through the second branch pipe, and the cylindrical portion of the branch pipe unit and the covering layer A waterproof layer for waterproofing, a waterproof layer for waterproofing between the first branch pipe part and the power cable derived therefrom, a second branch pipe part and a ground wire derived therefrom A waterproof layer for waterproofing between the connection conductors is formed.

上記のような分岐管ユニットを設けると、電力ケーブルの絶縁シース周りの防水と接地線の引出部の防水とをより確実に図ることができる。   Providing the branch pipe unit as described above makes it possible to more reliably achieve waterproofing around the insulating sheath of the power cable and waterproofing of the lead-out portion of the ground wire.

上記被覆層は遮水性を有する材料からなる収縮性チューブにより形成されていることが好ましい。収縮性チューブは、熱収縮性のチューブでも良く、常温収縮性を有するチューブでも良い。常温収縮性のチューブとしては例えば、要被覆部の外径よりも小さい内径を有するゴムチューブを用いることができる。   The coating layer is preferably formed of a shrinkable tube made of a material having a water shielding property. The shrinkable tube may be a heat-shrinkable tube or a tube having room temperature shrinkage. As the cold-shrinkable tube, for example, a rubber tube having an inner diameter smaller than the outer diameter of the required covering portion can be used.

本発明はまた、電力ケーブルを他の電力ケーブルに接続しているケーブル接続部本体と、ケーブル接続部本体により接続されている電力ケーブルのうちの特定の電力ケーブルの遮蔽層から導出されたシールド導体に接地線を電気的に接続して該接地線を外部に引き出す接地線引出部と、ケーブル接続部本体と接地線引出部とを一括して覆う遮水構造の保護外装部とを備えた電力ケーブル接続部に適用される。   The present invention also provides a cable connection body connecting a power cable to another power cable, and a shield conductor derived from a shielding layer of a specific power cable among the power cables connected by the cable connection body. A power supply comprising a ground wire lead portion that electrically connects the ground wire to the outside and pulls out the ground wire to the outside, and a protective exterior portion having a water shielding structure that collectively covers the cable connection portion main body and the ground wire lead portion. Applies to cable connections.

本発明に係わる電力ケーブル接続部は、接地線引出部の構成に特徴があるが、本発明で用いる接地線引出部がとるべき構成は、接地線引出部に係わる発明について既に述べたものと同様であるので、その説明は省略する。   The power cable connecting portion according to the present invention is characterized by the configuration of the ground wire lead-out portion, but the configuration to be taken by the ground wire lead-out portion used in the present invention is the same as that already described for the invention relating to the ground wire lead-out portion. Therefore, the description thereof is omitted.

本発明に係わる接地線引出部によれば、ケーブルの軸線方向に一定の長さを有する接地線引出金具の凹面を電力ケーブルの絶縁シースの外周にシール層を介して面接触させて、この接地線引出金具を通して接地線とケーブルの遮蔽層から導出されたシールド導体とを接続する構造にしたので、電力ケーブルの絶縁シースと接地線引出金具とをシール層を介して広い面積で接触させて、接地線引出金具と電力ケーブルの絶縁シースとの間を通して水が流れるのを確実に阻止することができる。また要被覆部を一括して被覆する収縮性の被覆層は、接地線に比べてはるかに大きい外表面積を有する接地線引出金具の外面に面接触させるので、該被覆層と接地線引出金具との間を通して水が流れるのを確実に阻止することができる。従って、本発明によれば、電力ケーブルのシールド導体導出部側の領域と接地線が引き出される側の領域との間の遮水を確実に図ることができ、接地線引出部の遮水性能を向上させることができる。   According to the ground wire lead portion according to the present invention, the ground surface of the ground wire lead fitting having a certain length in the axial direction of the cable is brought into surface contact with the outer periphery of the insulating sheath of the power cable via the seal layer. Since the ground wire and the shield conductor derived from the shield layer of the cable are connected through the wire lead fitting, the insulation sheath of the power cable and the ground wire lead fitting are brought into contact with each other over a wide area through the seal layer, It is possible to reliably prevent water from flowing between the ground wire lead fitting and the insulating sheath of the power cable. In addition, the shrinkable coating layer that covers the required coating portion in a lump is brought into surface contact with the outer surface of the ground wire lead fitting having a much larger outer surface area than the ground wire. It is possible to reliably prevent water from flowing through. Therefore, according to the present invention, water shielding between the region on the shield conductor lead-out portion side of the power cable and the region on the side from which the ground wire is drawn can be reliably achieved, and the water shielding performance of the ground wire lead portion can be improved. Can be improved.

請求項２に記載された発明によれば、柔軟性及び（又は）弾性を有するシール材のシートによりシール層を形成するので、該シール層を電力ケーブルの絶縁シースの表面と接地線引出金具の表面とに良く馴染ませて、接地線引出金具とケーブルの絶縁シースとの間のシールを確実に図ることができる。またシート状のシール材を用いたことにより、ケーブルの絶縁シースの上にシール材を載せてその上に接地線引出金具を載せるだけで、ケーブルの絶縁シースと接地線引出金具との間にシール材を介在させることができるため、ケーブルの絶縁シースと接地線引出金具との間をシールする作業を簡単にすることができる。   According to the second aspect of the present invention, since the sealing layer is formed by the sheet of the sealing material having flexibility and / or elasticity, the sealing layer is formed on the surface of the insulating sheath of the power cable and the grounding wire lead fitting. It can be well adapted to the surface to ensure a seal between the ground wire lead fitting and the cable insulation sheath. In addition, by using a sheet-like sealing material, simply place a sealing material on the cable insulation sheath, and place the grounding wire lead metal fitting on the sealing material, and seal between the cable insulation sheath and the grounding wire lead metal fitting. Since the material can be interposed, the work of sealing between the insulating sheath of the cable and the ground wire lead fitting can be simplified.

請求項３に記載された発明によれば、シール層が、接地線引出金具の凹面を取り囲む周縁部から外側にはみ出す大きさを有するように設けられて、接地線引出金具とシール層の表面との間を液密にシールするように接地線引出金具とシール層との間に跨ってシール用テープが貼り付けられるので、接地線引出部の遮水性を向上させることができる。   According to the invention described in claim 3, the seal layer is provided so as to have a size protruding outward from the peripheral edge surrounding the concave surface of the ground wire lead fitting, and the surface of the ground wire lead fitting and the seal layer is provided. Since the sealing tape is affixed between the ground wire lead fitting and the seal layer so as to seal the space in a liquid-tight manner, the water shielding property of the ground wire lead portion can be improved.

請求項４に記載された発明によれば、接地線引出金具の凸面が防食層で覆われているので、接地線引出金具の耐食性を高めることができ、接地線引出部の信頼性を高めることができる。   According to the invention described in claim 4, since the convex surface of the ground wire lead fitting is covered with the anticorrosion layer, the corrosion resistance of the ground wire lead fitting can be enhanced, and the reliability of the ground wire lead portion is enhanced. Can do.

請求項５に記載された発明によれば、接地線引出金具の凸面を防食層で覆う場合に、接地線引出金具の凹面と凸面との境界部を接地線引出金具の長手方向に沿って伸びる防食層の端縁部を斜めに面取りしたので、接地線引出金具の凹面と凸面との境界部（接地線引出金具の幅方向の両端部）とケーブルの絶縁シース外面との間に奥深い狭隙間が形成されて該狭間隙がシールの盲点となるのを防ぐことができ、遮水信頼性を向上させることができる。   According to the invention described in claim 5, when the convex surface of the ground wire lead fitting is covered with the anticorrosive layer, the boundary portion between the concave surface and the convex surface of the ground wire lead fitting extends along the longitudinal direction of the ground wire lead fitting. Since the edge of the anticorrosion layer is chamfered diagonally, there is a deep gap between the boundary between the concave and convex surfaces of the ground wire lead fitting (both ends in the width direction of the ground wire lead fitting) and the outer surface of the cable insulation sheath. And the narrow gap can be prevented from becoming a blind spot of the seal, and the water shielding reliability can be improved.

請求項６に記載された発明によれば、接地線引出金具を鋳造品として、その凹面を鋳物肌のままにしたので、接地線引出金具とシール材との接着性を良好にすることができる。   According to the invention described in claim 6, since the ground wire lead fitting is used as a cast product and the concave surface thereof is left as cast skin, the adhesion between the ground wire lead fitting and the sealing material can be improved. .

請求項７又は８に記載された発明によれば、シールド導体と接地線引出金具との接続部が接地線引出金具の凸面上にはみ出すのを防ぐことができるため、被覆層を形成する際にシールド導体と接地線引出金具との接続部が障害になるのを防いで、被覆層の形成を容易にすることができる。   According to the invention described in claim 7 or 8, it is possible to prevent the connecting portion between the shield conductor and the ground wire lead fitting from protruding on the convex surface of the ground wire lead fitting. It is possible to prevent the connection portion between the shield conductor and the ground wire lead metal fitting from becoming an obstacle and to easily form the coating layer.

請求項９又は１０に記載された発明によれば、接地線と接地線引出金具との接続部が接地線引出金具の凸面上にはみ出すのを防ぐことができるため、被覆層を形成する際に接地線接続導体と接地線引出金具との接続部が障害になるのを防いで、被覆層の形成を容易にすることができる。   According to the invention described in claim 9 or 10, since it is possible to prevent the connecting portion between the ground wire and the ground wire lead fitting from protruding on the convex surface of the ground wire lead fitting, when forming the coating layer It is possible to prevent the connection portion between the ground wire connecting conductor and the ground wire lead metal fitting from becoming an obstacle, and to easily form the coating layer.

請求項１１に記載された発明によれば、接地線引出金具が中空に形成されているので、該接地線引出金具を形成する導電材料を節約して、コストの低減を図ることができる。また接地線引出金具が中空に形成されていることにより、接地線引出金具の軽量化を図ることができるため、接地線引出部を形成する際の作業性を向上させることができる。   According to the eleventh aspect of the present invention, since the ground wire lead fitting is formed hollow, the conductive material forming the ground wire lead fitting can be saved and the cost can be reduced. In addition, since the ground wire lead fitting is formed hollow, the weight of the ground wire lead fitting can be reduced, so that the workability when forming the ground wire lead portion can be improved.

請求項１２又は１３に記載された発明によれば、凹面及び凸面を有する中空の金属部材により接地線引出金具を構成する場合に、該接地線引出金具の端部に管状のシールド導体圧着部又は接地線接続導体圧着部を形成して、これらの圧着部を用いてそれぞれシールド導体及び接地線を電気的に接続するように構成したので、接地線引出金具とシールド導体との接続及び接地線引出金具と接地線との接続を簡単に行うことができる。   According to the invention described in claim 12 or 13, when the ground wire lead fitting is constituted by a hollow metal member having a concave surface and a convex surface, a tubular shield conductor crimping portion or an end portion of the ground wire lead fitting is provided. Since the ground wire connecting conductor crimping portion is formed and the shield conductor and the ground wire are electrically connected using these crimping portions, respectively, the connection between the ground wire lead-out fitting and the shield conductor and the ground wire lead-out are configured. It is possible to easily connect the metal fitting to the ground wire.

請求項１４に記載された発明によれば、被覆層で被覆された接地線引出金具と電力ケーブルとを一括して収容し得る形状及び大きさを有する筒部の底部から電力ケーブルを貫通させ得る大きさの第１の分岐管部と接地線又は接地線を接地線引出金具に接続する接続導体を貫通させ得る大きさの第２の分岐管部とを突出させた構造を有する分岐管ユニットを設けて、この分岐管ユニットを電力ケーブルの接地線引出金具が配置された部分に装着するとともに、分岐管ユニットの筒部と被覆層との間の防水を図る防水層と、第１の分岐管部とここから導出された電力ケーブルとの間の防水を図る防水層と、第２の分岐管部とここから導出された接地線又は接続導体との間の防水を図る防水層とを形成したので、電力ケーブルの絶縁シース周りの防水と接地線の引出部の防水とをより確実に図って、接地線引出部の信頼性を高めることができる。   According to the invention described in claim 14, the power cable can be penetrated from the bottom of the cylindrical portion having a shape and a size capable of collectively accommodating the ground wire lead fitting and the power cable covered with the covering layer. A branch pipe unit having a structure in which a first branch pipe part having a size and a second branch pipe part having a size capable of passing through a connecting conductor that connects the ground wire or the ground wire to the ground wire lead fitting are projected; A waterproof layer for attaching the branch pipe unit to a portion where the ground wire lead fitting of the power cable is disposed, and a waterproof layer for waterproofing between the cylindrical portion of the branch pipe unit and the covering layer; and a first branch pipe Formed a waterproof layer for waterproofing between the portion and the power cable derived therefrom, and a waterproof layer for waterproofing between the second branch pipe portion and the ground wire or connecting conductor derived therefrom. So the protection around the insulation sheath of the power cable And the aim of the waterproof lead portions of the ground line to more reliably, it is possible to improve the reliability of the grounding wire outlet portion.

請求項１５に記載された発明によれば、被覆層が、遮水性を有する材料からなる収縮性チューブにより形成されているので、接地線引出部の遮水性能を高めて、その信頼性を高めることができる。   According to the invention described in claim 15, since the coating layer is formed of a shrinkable tube made of a material having a water-blocking property, the water-blocking performance of the ground wire lead-out portion is improved and the reliability thereof is increased. be able to.

また本発明に係わる電力ケーブル接続部においても、接地線引出部を上記と同様に構成したため、上記と同様の効果を得ることができ、接地線引出部の遮水性能が高く、信頼性が高い電力ケーブル接続部を得ることができる。   Also, in the power cable connection portion according to the present invention, since the ground wire lead portion is configured in the same manner as described above, the same effect as described above can be obtained, the water shielding performance of the ground wire lead portion is high, and the reliability is high. A power cable connection can be obtained.

以下図面を参照して、本発明の好ましい実施形態を詳細に説明する。
図１は、本発明の第１の実施形態に係わる電力ケーブル接続部１０を示したものである。図示の電力ケーブル接続部１０は、電力ケーブル１１を他の電力ケーブル１２に接続しているケーブル接続部本体１３と、接地線引出部１６と、保護外装部１７とを備えている。接地線引出部１６は、ケーブル接続部本体１３により接続されている電力ケーブル１１，１２のうちの特定の電力ケーブル１１の遮蔽層から導出されたシールド導体１１b1に接地線１５を電気的に接続して接地線１５を外部に引き出す部分である。また保護外装部１７は、接地線引出部１６と、ケーブル接続部本体１３と、ケーブル接続部本体１３により接続されている電力ケーブル１１，１２のケーブル接続部本体１３寄りの一定長さの部分とを一括して覆う部分で、遮水構造を有するように構成されている。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a power cable connection unit 10 according to the first embodiment of the present invention. The illustrated power cable connection unit 10 includes a cable connection unit main body 13 that connects the power cable 11 to another power cable 12, a ground wire lead-out unit 16, and a protective exterior unit 17. The ground wire lead-out portion 16 electrically connects the ground wire 15 to the shield conductor 11b1 derived from the shield layer of the specific power cable 11 of the power cables 11 and 12 connected by the cable connecting portion main body 13. This is the part that pulls out the ground wire 15 to the outside. The protective exterior portion 17 includes a ground wire lead-out portion 16, a cable connection portion main body 13, a portion of a certain length near the cable connection portion main body 13 of the power cables 11 and 12 connected by the cable connection portion main body 13, and It is comprised so that it may have a water-impervious structure in the part which covers all.

なお本明細書において、「ケーブル接続部本体により接続されている電力ケーブルのうちの特定の電力ケーブル」とは、ケーブル接続部本体により接続されている電力ケーブルのうち、遮蔽層から引き出されたシールド導体が、外部に引き出される接地線に電気的に接続される電力ケーブルである。図示の例ではケーブル接続部本体により接続されている電力ケーブルのうち、電力ケーブル１１のみから接地線が引き出されるため、電力ケーブル１１が特定の電力ケーブルとなる。電力ケーブル１１，１２の双方の遮蔽層から外部に接地線を引き出す場合には、電力ケーブル１１，１２の双方が特定の電力ケーブルとなる。   In addition, in this specification, "the specific power cable among the power cables connected by the cable connecting part main body" refers to the shield drawn from the shielding layer among the power cables connected by the cable connecting part main body. A conductor is a power cable that is electrically connected to a grounding wire drawn out to the outside. In the illustrated example, among the power cables connected by the cable connection unit main body, the ground line is drawn out only from the power cable 11, so that the power cable 11 becomes a specific power cable. When a ground wire is drawn out from the shielding layers of both the power cables 11 and 12, both the power cables 11 and 12 become specific power cables.

図１１を参照すると、ケーブル接続部本体１３の構成の一例が概略的に示されている。電力ケーブル１１及び１２は相互に接続されるに当って段剥ぎされ、それぞれを構成する各部が所定の長さずつ露呈される。接地線が引き出される特定の電力ケーブル１１においては、最外層の絶縁シース１１ａから外部半導電層１１ｃと絶縁体１１ｄと導体１１ｅとが所定の長さずつ露呈され、絶縁シース１１ａの内側にある遮蔽層から該遮蔽層を構成しているシールド導体１１b1が撚り合わされるなどして外部に引き出されている。また電力ケーブル１２においては、絶縁シース１２ａから遮蔽層１２ｂと外部半導電層１２ｃと絶縁体１２ｄと導体１２ｅとが所定長さずつ露呈されている。   Referring to FIG. 11, an example of the configuration of the cable connecting portion main body 13 is schematically shown. When the power cables 11 and 12 are connected to each other, the power cables 11 and 12 are stripped, and each part constituting each is exposed by a predetermined length. In the specific power cable 11 from which the ground line is drawn, the outer semiconductive layer 11c, the insulator 11d, and the conductor 11e are exposed by a predetermined length from the outermost insulating sheath 11a, and the shield inside the insulating sheath 11a is exposed. The shield conductor 11b1 constituting the shielding layer is drawn out from the layer by being twisted together. In the power cable 12, the shielding layer 12b, the outer semiconductive layer 12c, the insulator 12d, and the conductor 12e are exposed from the insulating sheath 12a by a predetermined length.

電力ケーブル１１及び１２は、それぞれの導体１１ｅ及び１２ｅを対向させた状態で配置され、それぞれの導体１１ｅ、１２ｅが圧着スリーブ等により接続されて導体接続部２０が構成される。導体接続部２０が構成された後、電力ケーブル１１の外部半導電層１１ｃ、絶縁体１１ｄ、電力ケーブル１２の外部半導電層１２ｃ、絶縁体１２ｄ及び導体接続部２０からなるケーブル１１及び１２の接続部分を覆うように公知の常温収縮性のゴムユニット２１が配設される。   The power cables 11 and 12 are arranged in a state where the conductors 11e and 12e are opposed to each other, and the conductors 11e and 12e are connected by a crimping sleeve or the like to form the conductor connecting portion 20. After the conductor connection portion 20 is configured, the connection of the cables 11 and 12 including the outer semiconductive layer 11c and the insulator 11d of the power cable 11 and the outer semiconductive layer 12c and the insulator 12d of the power cable 12 and the conductor connection portion 20 is performed. A known cold-shrinkable rubber unit 21 is disposed so as to cover the portion.

ゴムユニット２１は、ケーブルの接続部の保護と電界の緩和とを図るために設けられるもので、図示のゴムユニット２１は、電力ケーブル１１，１２の接続部分を覆う筒状の補強絶縁層２１ａと、該補強絶縁層の内周で導体接続部２０を同心的に取り囲む環状の内部半導電層２１ｂと、補強絶縁層２１ａの外周に形成されてケーブルを同心的に取り囲む外部半導電層２１ｃと、電力ケーブル１１側及び１２側にそれぞれ配置されて少なくとも一部が補強絶縁層２１ａの内部に埋め込まれた１対の半導電性のストレスコーン２１ｄ，２１ｅとにより構成されている。この例では、導体接続部２０とゴムユニット２１とにより、ケーブル接続部本体１３が構成されている。   The rubber unit 21 is provided to protect the connection portion of the cable and reduce the electric field. The rubber unit 21 shown in the figure includes a cylindrical reinforcing insulating layer 21a that covers the connection portion of the power cables 11 and 12. An annular inner semiconductive layer 21b that concentrically surrounds the conductor connecting portion 20 at the inner periphery of the reinforcing insulating layer, and an outer semiconductive layer 21c that is formed on the outer periphery of the reinforcing insulating layer 21a and concentrically surrounds the cable, A pair of semiconductive stress cones 21d and 21e, which are arranged on the power cable 11 side and the 12 side, respectively, and at least a part of which are embedded in the reinforcing insulating layer 21a, are configured. In this example, the cable connecting portion main body 13 is configured by the conductor connecting portion 20 and the rubber unit 21.

なお図示のケーブル接続部本体１３は、その一例を示したものであり、本実施形態で用いることができるケーブル接続部本体１３の構成は図示の例に限定されない。   In addition, the cable connection part main body 13 of illustration shows the example, and the structure of the cable connection part main body 13 which can be used by this embodiment is not limited to the example of illustration.

接地線が引き出される電力ケーブル１１側には、該ケーブルのシールド導体導出部（シールド導体１１b1が導出された絶縁シース１１ａの端部）１１ｆの近傍に位置させて、本発明の特徴部分である接地線引出部１６が設けられ、ケーブル接続部本体１３と接地線引出部１６とを一括して覆うように遮水性を有する材料からなる保護外装部１７が設けられる。   On the side of the power cable 11 from which the ground wire is drawn, the shield conductor lead-out portion (the end portion of the insulating sheath 11a from which the shield conductor 11b1 is drawn) 11f of the cable is positioned in the vicinity of the ground, which is a characteristic part of the present invention. A wire lead-out portion 16 is provided, and a protective exterior portion 17 made of a material having a water shielding property is provided so as to cover the cable connecting portion main body 13 and the ground wire lead-out portion 16 together.

図２ないし図４に詳細に示したように、本実施形態においては、接地線引出部１６が、銅等の良導電性の金属からなる接地線引出金具２５を備えている。図示の接地線引出金具２５は、電力ケーブル１１の軸線に沿う方向に一定の長さＬ1（図２参照）を有している。接地線引出金具２５は、接地線を引出す特定の電力ケーブル１１の絶縁シース１１ａの外周に沿うように湾曲した凹面２５Ａを外面の一部に有し、凹面２５Ａの反対側の部分の外面が、湾曲した凸面２５Ｂとなっている金属部材からなっている。この接地線引出金具は、凹面２５Ａがシール層Ｓを介して電力ケーブル１１の絶縁シースの外周に当接された状態で配置されることにより遮水壁として機能して、電力ケーブル接続部への水の浸入を阻止する働きをする。接地線引出金具の凹面２５Ａの軸線方向長さＬ1は、接地線引出金具２５と電力ケーブルの絶縁シースとの間を通して内部に水が浸入するのを確実に阻止するために必要な長さ、即ち、接地線引出金具２５に遮水壁としての機能を持たせるために必要な長さに設定される。   As shown in detail in FIGS. 2 to 4, in the present embodiment, the ground wire lead portion 16 includes a ground wire lead fitting 25 made of a highly conductive metal such as copper. The illustrated ground wire lead fitting 25 has a certain length L1 (see FIG. 2) in the direction along the axis of the power cable 11. The ground wire lead fitting 25 has a concave surface 25A that is curved along the outer periphery of the insulating sheath 11a of the specific power cable 11 that leads out the ground wire, and the outer surface of the portion on the opposite side of the concave surface 25A, It consists of the metal member used as the curved convex surface 25B. The ground wire lead fitting functions as a water shielding wall by being arranged in a state where the concave surface 25A is in contact with the outer periphery of the insulating sheath of the power cable 11 via the seal layer S, and is connected to the power cable connecting portion. It works to prevent water from entering. The axial length L1 of the concave surface 25A of the ground wire lead fitting is a length necessary to surely prevent water from entering through between the ground wire lead fitting 25 and the insulating sheath of the power cable, that is, The length required to give the ground wire lead fitting 25 a function as a water shielding wall is set.

接地線引出金具２５は、言うまでもなく、接地線として用いられる電線に流れる電流を十分に通電させる機能を有している。図示の例では、接地線引出金具２５の凹面２５Ａが円筒面状をなすように形成され、凸面２５Ｂがほぼ放物面状をなすように形成されている。   Needless to say, the ground wire lead fitting 25 has a function of sufficiently energizing the current flowing through the electric wire used as the ground wire. In the illustrated example, the concave surface 25A of the ground wire lead fitting 25 is formed to have a cylindrical surface shape, and the convex surface 25B is formed to have a substantially parabolic shape.

凹面２５Ａの曲率半径は、該凹面と電力ケーブルの絶縁シース１１ａとの間に介在させるシール層Ｓの外面（凹面２５Ａ側の面）の曲率半径に等しく設定するか、又はシール層Ｓの外面の曲率半径より僅かに大きめに設定しておくことが好ましい。凹面２５Ａの曲率半径がシール層Ｓの曲率半径よりも小さいと、図５（Ｂ）に示すように、凹面２５Ａの幅方向の中央部寄りの部分とシール層Ｓとの間に、幅方向の両端が閉じた隙間ｇ′が形成される。この隙間ｇ′が形成された部分にはシール材が入らないため、この部分が接地線引出金具２５と電力ケーブル１１との間のシールの盲点になって、水を通過させるおそれがある。凹面２５Ａの曲率半径と、シール層Ｓの外面の曲率半径と等しくすることができれば、凹面２５Ａとシール層Ｓとの間に隙間は生じないが、シール層Ｓの厚さを正確に一定とすることは難しく、凹面２５Ａの曲率半径とシール層の外面の曲率半径とを正確に等しくすることは難しい。従って、実際には、図５（Ａ）に示すように、凹面２５Ａの幅方向の両端とシール層Ｓとの間に、外方に開口した僅かな隙間ｇ，ｇが形成される程度に、凹面２５Ａの曲率半径をシール層Ｓの曲率半径よりも大きく設定しておくことが好ましい。凹面２５Ａの曲率半径をシール層Ｓの曲率半径よりも大きく設定する場合、凹面２５Ａの曲率半径と、シール層Ｓの外面の曲率半径との差が2.0 mmを超えないように設定するのが好ましい。   The radius of curvature of the concave surface 25A is set equal to the radius of curvature of the outer surface (surface on the concave surface 25A side) of the seal layer S interposed between the concave surface and the insulation sheath 11a of the power cable, or the outer surface of the seal layer S It is preferable to set it slightly larger than the radius of curvature. When the curvature radius of the concave surface 25A is smaller than the curvature radius of the seal layer S, the width in the width direction is between the portion of the concave surface 25A near the center in the width direction and the seal layer S as shown in FIG. A gap g ′ closed at both ends is formed. Since the seal material does not enter the portion where the gap g ′ is formed, this portion becomes a blind spot of the seal between the ground wire lead fitting 25 and the power cable 11, and there is a risk of passing water. If the radius of curvature of the concave surface 25A can be made equal to the radius of curvature of the outer surface of the seal layer S, no gap is formed between the concave surface 25A and the seal layer S, but the thickness of the seal layer S is made exactly constant. It is difficult to make the radius of curvature of the concave surface 25A and the radius of curvature of the outer surface of the sealing layer exactly equal. Therefore, actually, as shown in FIG. 5 (A), between the both ends in the width direction of the concave surface 25A and the seal layer S, a slight gap g, g opened outward is formed. The radius of curvature of the concave surface 25A is preferably set larger than the radius of curvature of the seal layer S. When the radius of curvature of the concave surface 25A is set larger than the radius of curvature of the seal layer S, it is preferable to set the difference between the radius of curvature of the concave surface 25A and the radius of curvature of the outer surface of the seal layer S not to exceed 2.0 mm. .

図５（Ａ）に示したように、凹面２５Ａとシール層Ｓとの間に形成される隙間ｇ，ｇが、凹面２５Ａの幅方向の両端で外方に開口するようにしておくと、各隙間ｇをシール用テープ等により塞ぐことは容易であるので、接地線引出金具２５と電力ケーブルとの間のシール性が損なわれるのを防ぐことができる。   As shown in FIG. 5A, when the gaps g, g formed between the concave surface 25A and the seal layer S are opened outward at both ends in the width direction of the concave surface 25A, Since it is easy to close the gap g with a sealing tape or the like, it is possible to prevent the sealing performance between the ground wire lead fitting 25 and the power cable from being impaired.

接地線引出金具２５を電力ケーブルの上に設置した状態で、接地線引出金具２５と電力ケーブルとを一括して取り囲むようにテープを巻き付けた際に、接地線引出金具２５の幅方向の両端付近で該テープと電力ケーブルの外周との間に大きな隙間を生じさせないように構成しておくのが好ましい。そのためには、図３に見られるように、接地線引出金具２５を電力ケーブル１１の上に設置した状態で、凸面２５Ｂの周方向の両端の延長面が電力ケーブル１１の絶縁シースの外周面に接するか、又はほぼ接した状態になるように、凸面２５Ｂの曲面形状と、接地線引出金具２５の幅寸法とを設定することが好ましい。本実施形態では、凹面２５Ａと凸面２５Ｂの境界部を形成する接地線引出金具２５の幅方向の両端が、図９に見られるように、角部を有しない、Ｒが付けられた形状を呈するように加工されている。   When the tape is wound so as to surround the ground wire lead fitting 25 and the power cable in a state where the ground wire lead fitting 25 is installed on the power cable, near the both ends in the width direction of the ground wire lead fitting 25 Therefore, it is preferable that a large gap is not formed between the tape and the outer periphery of the power cable. For this purpose, as shown in FIG. 3, the extended surfaces at both ends in the circumferential direction of the convex surface 25 </ b> B are formed on the outer peripheral surface of the insulating sheath of the power cable 11 with the ground wire lead fitting 25 being installed on the power cable 11. It is preferable to set the curved surface shape of the convex surface 25B and the width dimension of the ground wire lead fitting 25 so as to be in contact with or substantially in contact with each other. In the present embodiment, both ends in the width direction of the grounding lead metal fitting 25 that form the boundary between the concave surface 25A and the convex surface 25B have a corner shape and an R-shaped shape as shown in FIG. It is processed as follows.

本実施形態では、接地線引出金具２５が中実の部材からなっている。このように、接地線引出金具を中実に形成する場合には、量産性を高めるため、該接地線引出金具を鋳造により製造するのが好ましい。接地線引出金具２５を鋳造により製造する場合、該接地線引出金具２５の凹面２５Ａとシール層Ｓとの接着性を良好にするために、少なくとも凹面２５Ａは、鋳物肌のままとしておくことが好ましい。通常鋳物肌の表面粗さは、数十μｍないし２００μｍ程度である。接地線引出金具２５の凹面２５Ａを研磨すると、シール層との接着性が弱くなる。   In the present embodiment, the ground wire lead fitting 25 is made of a solid member. As described above, when the ground wire lead metal fitting is formed solidly, it is preferable to manufacture the ground wire lead metal fitting by casting in order to increase mass productivity. When the ground wire lead fitting 25 is manufactured by casting, in order to improve the adhesion between the concave surface 25A of the ground wire lead fitting 25 and the seal layer S, it is preferable that at least the concave surface 25A is left as cast skin. . Usually, the surface roughness of the casting skin is about several tens μm to 200 μm. When the concave surface 25A of the ground wire lead fitting 25 is polished, the adhesion with the seal layer is weakened.

本実施形態では、接地線引出金具２５の一端２５ａ（図２参照）寄りの一部の肉厚を他の部分の肉厚よりも薄くすることにより，接地線引出金具２５の一端側に凸面２５Ｂの頂部に対して段差を有して、凸面２５Ｂの頂部よりも凹面２５Ａ側に落ち込んだ接続面２５C1を有するシールド導体接続部２５Ｃが形成されている。このシールド導体接続部には、電力ケーブル１１の遮蔽層から導出されたシールド導体１１b1の先端に取り付けられた端子金具２６がボルト２７により接続されている。ケーブル１１から導出されたシールド導体１１b1は、外部半導電層１１ｃに巻き付けられたロールスプリング２３によりケーブル１１の外部半導電層１１ｃの外周に固定されている。   In the present embodiment, the thickness of a part of the ground wire drawing metal fitting 25 near one end 25a (see FIG. 2) is made thinner than the thickness of the other part, thereby providing a convex surface 25B on one end side of the ground wire drawing metal fitting 25. A shield conductor connection portion 25C having a connection surface 25C1 that has a step with respect to the top surface of the convex surface 25B and that has been lowered to the concave surface 25A side from the top portion of the convex surface 25B is formed. A terminal fitting 26 attached to the tip of the shield conductor 11b1 led out from the shielding layer of the power cable 11 is connected to the shield conductor connecting portion by a bolt 27. The shield conductor 11b1 led out from the cable 11 is fixed to the outer periphery of the outer semiconductive layer 11c of the cable 11 by a roll spring 23 wound around the outer semiconductive layer 11c.

更に、図３及び図４に見られるように、接地線引出金具の他端２５ｂ側には、その端面に開口する孔（有底の孔）２５Ｄが形成されている。この孔２５Ｄ内に接地線接続導体２８の一端が挿入されて該孔２５Ｄ内で接地線接続導体２８が圧入、溶接、又は銀ろう付け等により接地線引出金具に接続されている。接地線接続導体２８としては、平編導体のような可撓性を有する導体を用いることが好ましい。接地線接続導体２８の他端には、防水形の圧着端子金具２９が接続され、引き出される接地線１５の一端に半田付けされた端子金具３０（図２参照）がボルト３１及びナット３２により圧着端子金具２９に接続されている。   Further, as seen in FIGS. 3 and 4, a hole (bottomed hole) 25 </ b> D that opens to the end face is formed on the other end 25 b side of the ground wire lead fitting. One end of the ground line connection conductor 28 is inserted into the hole 25D, and the ground line connection conductor 28 is connected to the ground line lead fitting by press fitting, welding, silver brazing, or the like in the hole 25D. As the ground line connecting conductor 28, it is preferable to use a flexible conductor such as a flat knitted conductor. A waterproof crimp terminal fitting 29 is connected to the other end of the ground wire connecting conductor 28, and a terminal fitting 30 (see FIG. 2) soldered to one end of the drawn ground wire 15 is crimped by a bolt 31 and a nut 32. It is connected to the terminal fitting 29.

なお本実施形態では、接地線接続導体２８の他端に圧着端子金具２９を接続して、該圧着端子金具２９を介して接地線接続導体２８と接地線１５とを接続しているが、接地線接続導体２８に圧着端子金具２９を接続することなく、該接地線接続導体２８を接地線や別の電力ケーブルから引き出された接地線接続導体等に圧着スリーブや半田付け等により接続するようにしても良い。また接地線１５を、直接、接地線引出金具２５に接続しても良い。   In the present embodiment, the crimp terminal fitting 29 is connected to the other end of the ground line connection conductor 28, and the ground line connection conductor 28 and the ground line 15 are connected via the crimp terminal fitting 29. Without connecting the crimp terminal fitting 29 to the line connection conductor 28, the ground line connection conductor 28 is connected to the ground line connection conductor or the like drawn from the ground line or another power cable by a crimp sleeve or soldering. May be. Further, the ground wire 15 may be directly connected to the ground wire lead fitting 25.

図４に示したように、接地線引出金具２５の外面は防食性を有するコーティング用樹脂材料からなる防食層３３により覆われ、接地線接続導体２８の外周には防水絶縁テープ３４が巻き付けられる。防食層３３は、例えばポリ塩化ビニル樹脂等のコーティング用樹脂材料により形成するのが好ましい。防食層３３は、ディッピング（接地線引出金具の凸面を処理槽に収容したコーティング用の樹脂液に接触させる方法）や吹きつけ塗装等の適宜の方法により形成することができる。接地線引出金具２５の凹面２５Ａとシール層Ｓとの接着性を高め、凸面２５Ｂと防食層３３との接着性を高めるため、接地線引出金具２５の凹面２５Ａ及び凸面２５Ｂの外面には接着剤を塗布しておくのが好ましい。この接着剤としては、熱硬化性のものを用いるのが好ましい。接地線引出金具２５の凸面から凹面にかけて接着剤を塗布しておくと、防食層３３を接地線引出金具２５に強固に接着することができ、防食層が剥がれて遮水性が損なわれるおそれをなくすことができる。特にディッピングにより防食層３３を形成する場合には、接地線引出金具２５の幅方向の両端部に達している防食層の端部が剥がれやすい。万一防食層の端部が剥がれると、その部分から接地線引出金具２５の長手方向に沿って内部に水が浸入して遮水性が失われるため、上記のように接着剤を塗布して、防食層の端部の剥離を防止しておくことが有効である。   As shown in FIG. 4, the outer surface of the ground wire lead fitting 25 is covered with an anticorrosion layer 33 made of a coating resin material having anticorrosion properties, and a waterproof insulating tape 34 is wound around the outer periphery of the ground wire connection conductor 28. The anticorrosion layer 33 is preferably formed of a coating resin material such as polyvinyl chloride resin. The anticorrosion layer 33 can be formed by an appropriate method such as dipping (a method in which the convex surface of the ground wire lead fitting is brought into contact with the coating resin solution accommodated in the treatment tank) or spray coating. In order to improve the adhesiveness between the concave surface 25A of the ground wire lead-out fitting 25 and the seal layer S and to improve the adhesiveness between the convex surface 25B and the anticorrosion layer 33, an adhesive is applied to the outer surfaces of the concave surface 25A and the convex surface 25B of the ground wire lead-out metal fitting 25. It is preferable to apply. As this adhesive, it is preferable to use a thermosetting material. If an adhesive is applied from the convex surface to the concave surface of the ground wire lead fitting 25, the anticorrosion layer 33 can be firmly adhered to the ground wire lead fitting 25, and the possibility of the water barrier property being impaired due to the anticorrosion layer being peeled off is eliminated. be able to. In particular, when the anticorrosion layer 33 is formed by dipping, the end portions of the anticorrosion layer reaching the both end portions in the width direction of the ground wire lead fitting 25 are easily peeled off. In the unlikely event that the end of the anticorrosion layer is peeled off, water penetrates into the inside along the longitudinal direction of the ground wire lead fitting 25 from that portion and the water shielding property is lost, so apply the adhesive as described above, It is effective to prevent peeling of the end portion of the anticorrosion layer.

なお本実施形態では、接地線接続導体２８として裸導体（好ましくは平編導体）を用いているが、接地線接続導体２８は、外周に絶縁被覆を有する絶縁電線（但し可撓性を有するもの）からなっていても良い。接地線接続導体２８として絶縁電線を用いる場合には、その電気的な接続に用いられる部分、即ち、接地線引出金具２５に接続される部分及び接地線１５又は他の電力ケーブルから引き出された接地線接続導体等に接続される部分のみの絶縁被覆を除去して、電気的な接続には用いない部分の絶縁被覆を残しておくことにより、テープ巻きを省略することができる。   In this embodiment, a bare conductor (preferably a flat knitted conductor) is used as the ground line connecting conductor 28. However, the ground line connecting conductor 28 is an insulated wire having an insulating coating on the outer periphery (however, having flexibility). ). When an insulated wire is used as the ground line connection conductor 28, a portion used for the electrical connection, that is, a portion connected to the ground wire lead fitting 25 and the ground drawn from the ground wire 15 or other power cable. The tape winding can be omitted by removing the insulating coating only on the portion connected to the line connecting conductor or the like and leaving the insulating coating on the portion not used for electrical connection.

接地線引出金具２５の高さは、シールド導体１１b1の接続及び接地線接続導体２８の接続に支障を来さない大きさに設定される。図示のように、シールド導体１１b1の端部に接続した端子金具２６をボルト２７により接地線引出金具２５に接続する場合には、端子金具２６及びボルト２７が接地線引出金具２５からはみ出さないように、接地線引出金具２５の高さが設定される。絶縁シースの外径が４０mm〜６５mmの範囲にある６６ｋＶＣＶＴクラスの電力ケーブルに接地線引出金具２５を適用する場合、接地線引出金具２５の高さは１５mm〜２５mmの範囲に設定することが好ましい。接地線引出金具２５の高さが低すぎると、シールド導体１１b1を接続するボルト２７が接地線引出金具２５からはみ出してしまう。例えば、ボルト２７としてＭ８規格のものを用いる場合、その頭部が接地線引出金具２５からはみ出さないようにするためには、接地線引出金具２５の高さを１５mm以上とすることが必要である。接地線引出金具２５の高さが高すぎると、不安定になり、接地線引出金具２５が電力ケーブルから落ちやすくなる。   The height of the ground wire lead fitting 25 is set to a size that does not hinder the connection of the shield conductor 11b1 and the connection of the ground wire connection conductor 28. As shown in the figure, when the terminal fitting 26 connected to the end of the shield conductor 11b1 is connected to the ground wire lead fitting 25 by the bolt 27, the terminal fitting 26 and the bolt 27 do not protrude from the ground wire lead fitting 25. In addition, the height of the ground wire lead fitting 25 is set. When the ground wire lead fitting 25 is applied to a 66 kVCVT class power cable having an outer diameter of the insulating sheath in the range of 40 mm to 65 mm, the height of the ground wire lead fitting 25 is preferably set to a range of 15 mm to 25 mm. If the height of the ground wire lead fitting 25 is too low, the bolt 27 connecting the shield conductor 11b1 protrudes from the ground wire lead fitting 25. For example, when an M8 standard bolt 27 is used, in order to prevent the head from protruding from the ground wire lead 25, the height of the ground wire lead 25 needs to be 15 mm or more. is there. If the height of the ground wire lead fitting 25 is too high, it becomes unstable and the ground wire lead fitting 25 tends to fall off the power cable.

図１及び図２に示されているように、接地線引出金具２５は、その一端２５ａを電力ケーブル１１のシールド導体導出部１１ｆに向け、かつ凹面２５Ａを電力ケーブル１１の絶縁シース１１ａの外周にシール層Ｓを介して当接させた状態で電力ケーブル１１のシールド導体導出部１１ｆ付近に設置される。   As shown in FIGS. 1 and 2, the ground wire lead fitting 25 has one end 25 a directed to the shield conductor lead-out portion 11 f of the power cable 11 and a concave surface 25 A on the outer periphery of the insulating sheath 11 a of the power cable 11. The power cable 11 is installed in the vicinity of the shield conductor lead-out portion 11f in a state of being in contact with the seal layer S.

シール層Ｓは、粘着性と柔軟性及び（又は）弾性とを有するシール材からなる絶縁シート３５により形成するのが好ましい。絶縁シート３５としては、粘着性を有する絶縁パテシートが好適である。絶縁パテシートとしては、電力ケーブルの分野でケーブル同士の接続部のシール等の目的で広く用いられているものを使用することができる。   The sealing layer S is preferably formed of an insulating sheet 35 made of a sealing material having adhesiveness, flexibility, and / or elasticity. As the insulating sheet 35, an adhesive putty sheet having adhesiveness is suitable. As the insulating putty sheet, a sheet widely used for the purpose of sealing a connection portion between cables in the field of power cables can be used.

図６ないし図１０は、電力ケーブル１１の外周に接地線引出金具２５を配置して固定する過程を順に示している。
電力ケーブル１１の外周に接地線引出金具２５を配置する際には、先ず図６（Ａ）に示すように、電力ケーブル１１の外周の接地線引出金具を配置する箇所に、矩形状の絶縁シート３５を、その粘着性を利用して固定する。次いで図６（Ｂ）及び（Ｃ）に示すように絶縁シート３５の上に接地線引出金具２５を、その凹面２５Ａを絶縁シート３５に接触させた状態で載せ、絶縁シート３５の粘着性を利用して接地線引出金具２５をシート３５に固定する。このように、接地線引出金具２５を配置した状態で、シール層Ｓの周縁部が接地線引出金具の凹面２５Ａを取り囲む周縁部から外側にはみ出すように、シール層を構成するシート３５の大きさを設定しておく。 6 to 10 sequentially show the process of arranging and fixing the ground wire lead fitting 25 on the outer periphery of the power cable 11.
When arranging the ground wire lead fitting 25 on the outer periphery of the power cable 11, first, as shown in FIG. 6A, a rectangular insulating sheet is provided at the place where the ground wire lead fitting on the outer periphery of the power cable 11 is arranged. 35 is fixed using its adhesiveness. Next, as shown in FIGS. 6B and 6C, the grounding lead wire 25 is placed on the insulating sheet 35 with the concave surface 25A in contact with the insulating sheet 35, and the adhesiveness of the insulating sheet 35 is utilized. Then, the ground wire lead fitting 25 is fixed to the sheet 35. Thus, in the state where the ground wire lead fitting 25 is disposed, the size of the sheet 35 constituting the seal layer is such that the peripheral portion of the seal layer S protrudes outward from the peripheral portion surrounding the concave surface 25A of the ground wire lead fitting. Is set in advance.

上記のようにして電力ケーブル１１の上に接地線引出金具２５を設置した後、接地線引出金具の凹面２５Ａを取り囲む周縁部の全体に亘って、かつ接地線引出金具２５とシール層Ｓの表面との間に跨って、接地線引出金具２５に接着する接着性とシール層Ｓに融着する融着性と隙間内への充填性とを有するシール用テープを貼り付けることにより、接地線引出金具２５とシール層Ｓの表面との間を液密にシールする。このシールを行う際には、先ず図７（Ａ）及び（Ｂ）に示したように接地線引出金具２５の幅方向の両端（軸線方向に対して直角な方向）の端縁部とシール層Ｓの外面とに跨って、接地線引出金具２５の軸線方向にシール用テープ３６を貼り付ける。   After installing the ground wire lead fitting 25 on the power cable 11 as described above, the surface of the ground wire lead fitting 25 and the seal layer S is formed over the entire peripheral edge surrounding the concave surface 25A of the ground wire lead fitting. Attaching a sealing tape having adhesiveness for adhering to the grounding wire drawing metal fitting 25, fusing property for fusing to the sealing layer S, and filling property in the gap between The space between the metal fitting 25 and the surface of the seal layer S is liquid-tightly sealed. When this sealing is performed, first, as shown in FIGS. 7A and 7B, the edge portions of the both ends in the width direction (direction perpendicular to the axial direction) of the ground wire lead 25 and the sealing layer A sealing tape 36 is affixed in the axial direction of the ground wire lead fitting 25 across the outer surface of S.

次いで、図８（Ａ）ないし（Ｃ）に示したように、接地線引出金具２５の軸線方向の（長手方向の）両端の端面の、凹面２５Ａの周方向に沿う端縁部と、シール層Ｓの外面とに跨って、凹面２５Ａの周方向に沿ってシール用テープ３７を貼り付ける。シール用テープ３６及び３７を貼り付ける際には、接地線引出金具の端縁部とシール層Ｓの外面との間に存在する隙間にシール用テープを押し込んで、該隙間をシール用テープで充填するようにする。   Next, as shown in FIGS. 8A to 8C, end edges along the circumferential direction of the concave surface 25 </ b> A of the end faces of both ends in the axial direction (longitudinal direction) of the ground wire drawing fitting 25 and the seal layer A sealing tape 37 is pasted along the circumferential direction of the concave surface 25A across the outer surface of S. When affixing the sealing tapes 36 and 37, the sealing tape is pushed into the gap existing between the edge of the ground wire lead fitting and the outer surface of the sealing layer S, and the gap is filled with the sealing tape. To do.

接地線引出金具２５の凸面の外周を覆う防食層３３を形成した場合、図９（Ｂ）に示すように、接地線引出金具２５の凹面２５Ａと凸面２５Ｂとの境界部２５ｐ付近で接地線引出金具２５の長手方向に沿って伸びる防食層３３の端縁部３３ａが、接地線引出金具２５の幅方向の端部に重なるため、接地線引出金具２５の幅方向の両端の端部のＲ（曲率半径）が大きくなり、接地線引出金具２５の幅方向の両端とシール層Ｓの外面との間に奥深い狭間隙Ｇ′が形成され易い。この狭間隙Ｇ′には、シール用テープ３６が入りにくいため、この部分がシールの盲点になりやすい。   When the anticorrosion layer 33 covering the outer periphery of the convex surface of the ground wire lead fitting 25 is formed, as shown in FIG. 9B, the ground wire lead is drawn near the boundary 25p between the concave surface 25A and the convex surface 25B of the ground wire lead metal fitting 25. Since the edge portion 33a of the anticorrosion layer 33 extending along the longitudinal direction of the metal fitting 25 overlaps with the widthwise end portion of the ground wire drawing metal fitting 25, R ( (Curvature radius) increases, and a deep narrow gap G ′ is easily formed between both ends in the width direction of the ground wire lead fitting 25 and the outer surface of the seal layer S. Since the sealing tape 36 is difficult to enter the narrow gap G ′, this portion tends to become a blind spot of the seal.

そこで、本実施形態では、図９（Ａ）に示したように、接地線引出金具の凹面と凸面との境界部２５ｐで接地線引出金具の長手方向に沿って伸びる防食層３３の端縁部３３ａが、先端側ほど薄くなるように加工されている。すなわち、傾斜面をなすように斜めに面取りされている。このように、防食層Ｓの端縁部３３ａを面取りしておくと、接地線引出金具２５の幅方向の両端とシール層Ｓの外面との間に形成される間隙Ｇを浅くすることができるため、シール用テープ３６を間隙Ｇに容易に充填することができ、シールの盲点が生じるのを防ぐことができる。   Therefore, in the present embodiment, as shown in FIG. 9A, the edge portion of the anticorrosion layer 33 extending along the longitudinal direction of the ground wire lead fitting at the boundary portion 25p between the concave surface and the convex surface of the ground wire lead fitting. 33a is processed so as to be thinner toward the tip side. That is, it is chamfered obliquely so as to form an inclined surface. In this way, when the edge portion 33a of the anticorrosion layer S is chamfered, the gap G formed between both ends in the width direction of the ground wire lead fitting 25 and the outer surface of the seal layer S can be made shallow. Therefore, the gap G can be easily filled with the sealing tape 36, and a blind spot of the seal can be prevented from occurring.

上記のようにして、接地線引出金具２５とシール層Ｓの表面との間を液密にシールした後、図１０に示したように、接地線引出金具２５と電力ケーブル１１とを一括して取り囲むようにシール用テープ３８を巻く。このようにシール用テープ３８を巻いた際に、接地線引出金具２５の幅方向の両端の近傍でシール用テープ３８と電力ケーブル１１の外周との間に大きな隙間を生じさせないように、接地線引出金具２５の凸面２５Ｂの曲面形状と、接地線引出金具２５の幅寸法とを設定しておく。   As described above, after sealing the space between the ground wire lead fitting 25 and the surface of the seal layer S, as shown in FIG. 10, the ground wire lead fitting 25 and the power cable 11 are bundled together. The sealing tape 38 is wound so as to surround it. In this way, when the sealing tape 38 is wound, a grounding wire is formed so as not to generate a large gap between the sealing tape 38 and the outer periphery of the power cable 11 in the vicinity of both ends in the width direction of the grounding wire extraction fitting 25. The curved surface shape of the convex surface 25B of the lead metal fitting 25 and the width dimension of the ground wire lead metal fitting 25 are set in advance.

シール用テープ３６ないし３８としては、ブチルゴムをベースとした自己融着テープ、粘着性水密テープ、パテテープ等、電力ケーブルの接続部の水密処理を行う際に用いられているものを用いることができる。   As the sealing tapes 36 to 38, those used when performing the watertight treatment of the connecting portion of the power cable, such as a self-bonding tape based on butyl rubber, an adhesive watertight tape, and a putty tape can be used.

上記のようにして、電力ケーブル１１の外周に接地線引出金具２５を設置した後、図２に示されているように、接地線引出金具２５の外面の少なくとも一部と、電力ケーブル１１のシールド導体導出部１１ｆ付近の外面とを含む要被覆部が、一括して保護外装部１７により被覆され、保護外装部１７と接地線引出金具２５とにより、電力ケーブルのシールド導体導出部側の領域と前記接地線が引き出される側の領域との間の遮水が図られる。   After the ground wire lead fitting 25 is installed on the outer periphery of the power cable 11 as described above, at least a part of the outer surface of the ground wire lead fitting 25 and the shield of the power cable 11 as shown in FIG. The necessary covering portion including the outer surface in the vicinity of the conductor lead-out portion 11f is collectively covered with the protective sheathing portion 17, and the protective sheathing portion 17 and the ground wire lead-out fitting 25 provide a region on the shield conductor leading-out portion side of the power cable. Water shielding between the area on the side from which the ground wire is drawn out is achieved.

上記「要被覆部」は、電力ケーブルのシールド導体導出部側の領域と接地線が引き出される側の領域との間の遮水を図るために被覆する必要がある部分であり、要被覆部の範囲は、実験により検証して、適宜に設定される。   The above “covering portion” is a portion that needs to be covered in order to provide water shielding between the region on the shield conductor lead-out portion side of the power cable and the region on the side from which the ground wire is drawn. The range is verified appropriately by experiments and set as appropriate.

本実施形態では、図１に示すように、保護外装部１７は、電力ケーブル１１の接地線引出金具２５が配置された部分から電力ケーブル１２のケーブル接続部本体１３付近の部分に至るように配置されている。この保護外装部１７は、図２に示すように、ケーブル接続部本体１３と、接地線引出金具２５の大部分（接地線引出部１６の大部分）と、ケーブル接続部本体１３により接続されている電力ケーブル１１，１２のケーブル接続部本体１３寄りの一定長さの部分とを一括して覆う被覆層１７ａと、被覆層１７ａの端部から該被覆層内に水が浸入するのを阻止するために、被覆層１７ａの端部と接地線引出金具２５の外周及び電力ケーブル１１の外周とに跨って巻き付けられた防水テープ１７ｂとにより構成されている。防水テープ１７ｂとしては、自己融着テープを用いるのが好ましい。   In the present embodiment, as shown in FIG. 1, the protective armor 17 is disposed so as to extend from a portion where the ground wire lead fitting 25 of the power cable 11 is disposed to a portion near the cable connecting portion main body 13 of the power cable 12. Has been. As shown in FIG. 2, the protective exterior portion 17 is connected by the cable connection portion main body 13, the most part of the ground wire lead fitting 25 (most portion of the ground wire lead portion 16), and the cable connection portion main body 13. A covering layer 17a that collectively covers a portion of the power cables 11 and 12 that are close to the cable connecting portion main body 13 and that prevents water from entering the covering layer from the end of the covering layer 17a. Therefore, the waterproof tape 17b is wound around the end of the covering layer 17a, the outer periphery of the ground wire lead fitting 25, and the outer periphery of the power cable 11. It is preferable to use a self-bonding tape as the waterproof tape 17b.

被覆層１７ａは、遮水性を有する収縮チューブからなっていて、被覆層１７ａの遮水性と、防水テープ１７ｂによる遮水機能（被覆層１７ａの端部から該被覆層内に水が浸入するのを阻止する機能）とにより、保護外装部１７が遮水構造（外部からの水の浸入を遮断する構造）とされている。   The covering layer 17a is made of a shrinkable tube having a water-blocking property, and the water-blocking function of the coating layer 17a and the water-blocking function by the waterproof tape 17b (water enters the coating layer from the end of the coating layer 17a). Therefore, the protective exterior portion 17 has a water shielding structure (a structure for blocking water from entering from the outside).

本実施形態では、接地線引出金具２５の凸面２５Ｂの外周面にディッピング等により防食層３３が形成されているが、防食層３３は、被覆層１７ａを形成する収縮チューブとの密着性が良い。従って、凸面２５Ｂの外周面に防食層３３を形成しておくと、接地線引出金具２５の耐食性を高めることができるだけでなく、被覆層１７ａと接地線引出金具２５の凸面２５Ｂとの密着性を良くして、遮水性能を高めることができる。   In the present embodiment, the anticorrosion layer 33 is formed by dipping or the like on the outer peripheral surface of the convex surface 25B of the ground wire lead fitting 25, but the anticorrosion layer 33 has good adhesion to the shrinkable tube forming the coating layer 17a. Therefore, if the anticorrosion layer 33 is formed on the outer peripheral surface of the convex surface 25B, not only can the corrosion resistance of the ground wire lead fitting 25 be improved, but also the adhesion between the coating layer 17a and the convex surface 25B of the ground wire lead fitting 25 can be improved. It is possible to improve the water shielding performance.

なお保護外装部１７の内側にはケーブル接続部本体１３を覆う半導電層や遮蔽層を形成するためのテーピングなどが施されるが、本発明の要旨とは直接関係がないためその説明は省略する。   Note that taping or the like for forming a semiconductive layer or a shielding layer for covering the cable connecting portion main body 13 is applied to the inner side of the protective exterior portion 17, but the description thereof is omitted because it is not directly related to the gist of the present invention. To do.

図２に示した例では、収縮チューブからなる被覆層１７ａの端部が接地線引出金具２５の他端２５ｂの手前の位置で終端しているが、防水テープ１７ｂの巻き付けに支障を来さない範囲で、被覆層１７ａの端部の位置を接地線引出金具の他端２５ｂに近づけることもできる。被覆層１７ａは、接地線引出金具２５の外面の大部分を覆うように設ければよく、その端部の位置は特定の位置に限定されないが、被覆層１７ａと接地線引出金具２５との重なり代Ｌ2が、所定の遮水性能が得るために必要な大きさを下回らないようにしておく必要がある。   In the example shown in FIG. 2, the end portion of the covering layer 17a made of a shrinkable tube is terminated at a position before the other end 25b of the ground wire lead fitting 25, but does not hinder the winding of the waterproof tape 17b. Within the range, the position of the end portion of the coating layer 17a can be brought closer to the other end 25b of the ground wire lead fitting. The covering layer 17a may be provided so as to cover most of the outer surface of the ground wire lead fitting 25, and the position of the end portion is not limited to a specific position, but the covering layer 17a overlaps with the ground wire lead fitting 25. It is necessary that the margin L2 does not fall below the size necessary for obtaining a predetermined water shielding performance.

被覆層１７ａを構成する収縮性チューブとしては、常温で収縮性を有するもの、又は加熱されることにより収縮するもの（熱収縮性チューブ）を選択する。「常温で収縮性を有するチューブ」は、弾性材料からなっていて、自由な状態では要被覆部の外径よりも小さい内径を有し、要被覆部に被せられたときに自らが有する弾性により常温で収縮するものであり、典型的のものは、ゴムチューブである。   As the shrinkable tube constituting the coating layer 17a, a shrinkable tube at room temperature or a tube that shrinks when heated (heat-shrinkable tube) is selected. “Tubes that are shrinkable at room temperature” are made of an elastic material, have an inner diameter that is smaller than the outer diameter of the required covering portion in a free state, and are elastic due to their own elasticity when covered with the required covering portion. One that shrinks at room temperature, and a typical one is a rubber tube.

常温収縮性のチューブにより被覆層１７ａを形成する場合には、適宜の拡径手段により該チューブの径を拡大した状態で該チューブを要被覆部に被せた後、径拡手段をチューブから外して、その径を収縮させることにより、チューブを要被覆部に密着させる。   When the coating layer 17a is formed from a cold-shrinkable tube, after covering the tube with the necessary covering portion in a state where the diameter of the tube is expanded by an appropriate diameter expanding means, the diameter expanding means is removed from the tube. By contracting the diameter, the tube is brought into close contact with the covering portion.

本実施形態では、接地線接続導体２８の導出部及び電力ケーブル１１の導出部の防水を効果的に図るため、更に図２、図１２に示したような分岐ユニット４０が設けられている。図示の分岐ユニット４０は、被覆層１７ａで被覆された接地線引出金具２５と電力ケーブル１１とを一括して収容し得る形状及び大きさを有する有底の筒部４１と、筒部４１の底部から外方に突出して延びる第１の分岐管部４２及び第２の分岐管部４３とを一体に有している。筒部４１は、その横断面が、電力ケーブル１１の外周の一部を隙間を介して取り囲む大径の円弧状部４１ａの両端と、接地線引出金具２５の外面を隙間を介して取り囲む小径の円弧状部４１ｂの両端との間をそれぞれ直線４１ｃ，４１ｄで結んだほぼ卵形の輪郭形状を有するように形成されている。筒部４１の底部には、大径の円弧状部４１ａ側及び小径の円弧状部４１ｂ側にそれぞれ位置させて、第１の分岐管部４２及び第２の分岐管部４３が、それぞれの中心軸線を筒部４１の軸線と平行させた状態で突設されている。第１の分岐管部４２は、電力ケーブル１１を貫通させ得る大きさに形成され、第２の分岐管部４３は、接地線接続導体２８を貫通させ得る大きさに形成されている。   In the present embodiment, a branch unit 40 as shown in FIGS. 2 and 12 is further provided to effectively waterproof the lead-out portion of the ground line connecting conductor 28 and the lead-out portion of the power cable 11. The illustrated branch unit 40 includes a bottomed tubular portion 41 having a shape and a size capable of collectively housing the ground wire lead fitting 25 and the power cable 11 covered with the covering layer 17a, and a bottom portion of the tubular portion 41. The first branch pipe portion 42 and the second branch pipe portion 43 that protrude outwardly from each other are integrally provided. The cylindrical portion 41 has a small cross-section that surrounds both ends of the large-diameter arc-shaped portion 41a that surrounds a part of the outer periphery of the power cable 11 via a gap and the outer surface of the ground wire lead fitting 25 via a gap. The arc-shaped portion 41b is formed so as to have a substantially oval contour shape connecting the both ends with straight lines 41c and 41d. The first branch pipe part 42 and the second branch pipe part 43 are respectively located at the bottom of the cylindrical part 41 on the large-diameter arcuate part 41a side and the small-diameter arcuate part 41b side. The projection is provided in a state where the axis is parallel to the axis of the cylindrical portion 41. The first branch pipe portion 42 is formed to a size that allows the power cable 11 to pass therethrough, and the second branch pipe portion 43 is formed to a size that allows the ground line connection conductor 28 to pass therethrough.

上記分岐管ユニット４０は、図２に示されているように、その筒部４１内に接地線引出金具２５と電力ケーブル１１及び被覆層１７ａの一部とを収容した状態で、電力ケーブル１１の接地線引出金具２５が配置された部分に装着されている。そして、電力ケーブル１１の接地線引出金具２５よりも接地線側に位置する部分が、第１の分岐管部４２内を通して外部に導出され、接地線接続導体２８が、第２の分岐管４３内を通して外部に導出されている。   As shown in FIG. 2, the branch pipe unit 40 includes a ground wire lead fitting 25, the power cable 11, and a part of the covering layer 17 a in a cylindrical portion 41 of the power cable 11. It is attached to the portion where the ground wire lead fitting 25 is disposed. A portion of the power cable 11 that is located closer to the ground line than the ground line lead fitting 25 is led out through the first branch pipe portion 42, and the ground line connection conductor 28 is connected to the second branch pipe 43. It is derived to the outside through.

また分岐管ユニット４０の筒部４１と被覆層１７ａとの間をシールする防水層４５と、第１の分岐管部４２と該第１の分岐管部から導出された電力ケーブル１１との間をシールする防水層４６と、第２の分岐管部４３と該第２の分岐管部から導出された接地線接続導体２８との間をシールする防水層４７とが形成されている。分岐管ユニット４０内には、防水コンパウンド５０やジェルを充填するのが好ましい。   Further, a waterproof layer 45 that seals between the tube portion 41 of the branch pipe unit 40 and the covering layer 17a, and the first cable branch portion 42 and the power cable 11 led out from the first branch pipe portion. A waterproof layer 46 for sealing, and a waterproof layer 47 for sealing between the second branch pipe portion 43 and the ground line connecting conductor 28 led out from the second branch pipe portion are formed. The branch pipe unit 40 is preferably filled with a waterproof compound 50 or gel.

図示の例では、分岐管ユニット４０の筒部４１と被覆層１７ａとの間の防水を図る防水層４５が、分岐管ユニット４０の筒部４１の外周と被覆層１７ａの外周とに跨って自己融着テープ等からなる防水テープ又は防水用絶縁パテを巻き付けることにより形成されている。また、第１の分岐管部４２と該第１の分岐管部から導出された電力ケーブル１１との間の防水を図る防水層４６は、第１の分岐管部４２の外周と電力ケーブル１１の外周とに跨って防水テープ又は防水用絶縁パテを付けることにより形成され、第２の分岐管部４３と該第２の分岐管部から導出された接地線接続導体２８との間の防水を図る防水層４７は、第２の分岐管部４３と接地線接続導体２８との間に防水用パテやテープ等を付けることにより形成されている。   In the illustrated example, the waterproof layer 45 for waterproofing between the cylindrical portion 41 of the branch pipe unit 40 and the covering layer 17a is self-stretched across the outer periphery of the cylindrical portion 41 of the branch pipe unit 40 and the outer periphery of the covering layer 17a. It is formed by winding a waterproof tape made of a fusion tape or the like or a waterproof insulating putty. Further, the waterproof layer 46 for waterproofing between the first branch pipe portion 42 and the power cable 11 led out from the first branch pipe portion is provided on the outer periphery of the first branch pipe portion 42 and the power cable 11. It is formed by attaching a waterproof tape or a waterproof insulating putty across the outer periphery, and waterproofing is performed between the second branch pipe portion 43 and the ground line connecting conductor 28 led out from the second branch pipe portion. The waterproof layer 47 is formed by attaching a waterproof putty, a tape, or the like between the second branch pipe portion 43 and the ground line connecting conductor 28.

図２に示した例では、分岐管ユニット４０の第２の分岐管部４３を通して導出された接地線接続導体２８の端部と、該接地線接続導体２８に接続された接地線１５とを覆うように絶縁被覆４８が設けられている。   In the example shown in FIG. 2, the end of the ground line connection conductor 28 led out through the second branch pipe portion 43 of the branch pipe unit 40 and the ground line 15 connected to the ground line connection conductor 28 are covered. Thus, an insulating coating 48 is provided.

上記のように、ケーブル１１の軸線方向に一定の長さ（遮水を図るために十分な長さ）Ｌ1を有する接地線引出金具２５の凹面２５Ａを電力ケーブル１１の絶縁シース１１ａの外周にシール材３５を介して面接触させて、この接地線引出金具２５を通して接地線１５とケーブル１１の遮蔽層から導出されたシールド導体１１b1とを接続する構造にすると、接地線引出金具２５が電力ケーブル１１の絶縁シース１１ａにシール材３５を介して広い面積で接触して遮水壁を構成するため、接地線引出金具２５と電力ケーブル１１の絶縁シース１１ａとの間を通して内部に水が浸入するのを確実に防止することができる。また本実施形態の接地線引出部では、要被覆部を一括して被覆する収縮性の被覆層１７ａが、接地線に比べてはるかに大きい外表面積を有する接地線引出金具２５の外面に面接触するので、該被覆層１７ａと接地線引出金具２５との間を通して内部に水が浸入するのを確実に阻止することができる。従って、本発明によれば、電力ケーブルのシールド導体導出部側の領域と接地線が引き出される側の領域との間の遮水を確実に図ることができ、接地線引出部の遮水性能を向上させることができる。   As described above, the concave surface 25A of the ground wire lead fitting 25 having a certain length L1 in the axial direction of the cable 11 (a sufficient length for water shielding) is sealed to the outer periphery of the insulating sheath 11a of the power cable 11. If the ground wire 15 and the shield conductor 11b1 led out from the shielding layer of the cable 11 are connected through the ground wire drawing metal fitting 25 through the surface 35, the ground wire drawing metal fitting 25 is connected to the power cable 11 through the ground wire drawing metal fitting 25. In order to form a water shielding wall by contacting the insulating sheath 11a with a large area through the sealing material 35, water enters the inside through the space between the ground wire lead fitting 25 and the insulating sheath 11a of the power cable 11. It can be surely prevented. Further, in the ground wire lead portion of the present embodiment, the shrinkable coating layer 17a that collectively covers the required covering portion is in surface contact with the outer surface of the ground wire lead fitting 25 having a much larger outer surface area than the ground wire. Therefore, it is possible to reliably prevent water from entering the inside through the space between the coating layer 17a and the ground wire lead fitting 25. Therefore, according to the present invention, water shielding between the region on the shield conductor lead-out portion side of the power cable and the region on the side from which the ground wire is drawn can be reliably achieved, and the water shielding performance of the ground wire lead portion can be improved. Can be improved.

また上記のように構成すると、接地線１５に比べて十分に広い外表面を有する接地線引出金具２５が電力ケーブル１１の絶縁シース１１ａの外面と要被覆部を被覆する被覆層１７ａとに面接触して遮水を図るので、電力ケーブルの絶縁シースの外面と要被覆部を被覆する被覆層１７ａとの間から接地線を直接引き出す場合に比べて、遮水機能を果たす部分の面積を大幅に広くして遮水性能を向上させることができる。   Further, when configured as described above, the ground wire lead fitting 25 having an outer surface sufficiently wider than the ground wire 15 is in surface contact with the outer surface of the insulating sheath 11a of the power cable 11 and the covering layer 17a covering the required covering portion. Therefore, compared with the case where the ground wire is directly drawn out between the outer surface of the insulation sheath of the power cable and the covering layer 17a covering the required covering portion, the area of the portion that performs the water blocking function is greatly increased. It can be widened to improve the water shielding performance.

図１３は、本発明の他の実施形態を示している。前記の実施形態では、分岐管ユニット４０を設けて、電力ケーブル１１の導出部及び接地線接続導体２８の導出部の防水を図るようにしたが、図１３に示した実施形態では、分岐管ユニット４０が省略されている。   FIG. 13 shows another embodiment of the present invention. In the above embodiment, the branch pipe unit 40 is provided to waterproof the lead-out portion of the power cable 11 and the lead-out portion of the ground wire connection conductor 28. However, in the embodiment shown in FIG. 40 is omitted.

上記の各実施形態では、接地線１５を接地線接続導体２８を介して接地線引出金具２５に接続するようにしたが、接地線１５を直接接地線引出金具２５に接続するように構成することもできる。   In each of the above embodiments, the ground wire 15 is connected to the ground wire lead fitting 25 via the ground wire connecting conductor 28. However, the ground wire 15 is configured to be directly connected to the ground wire lead fitting 25. You can also.

シールド導体１１b1と接地線引出金具２５との接続の仕方及び接地線接続導体２８又は接地線１５と接地線引出金具２５との接続の仕方は、電気的及び機械的な接続を図ることができるものであればよく、上記の例に限定されない。   The connection method between the shield conductor 11b1 and the ground wire lead fitting 25 and the connection method between the ground wire connection conductor 28 or the ground wire 15 and the ground wire lead fitting 25 can be electrically and mechanically connected. There is no limitation to the above example.

例えば、図１４に示したように、接地線引出金具２５の一端側に、該接地線引出金具の凸面の頂部に対して段差を有するシールド導体接続部を設けることなく、接地線引出金具２５の一端にシールド導体接続導体６０を接続して、シールド導体１１b1をこのシールド導体接続導体６０を介して接地線引出金具２５に接続するようにしても良い。   For example, as shown in FIG. 14, without providing a shield conductor connecting portion having a step with respect to the top of the convex surface of the ground wire lead fitting 25 on one end side of the ground wire lead fitting 25, The shield conductor connection conductor 60 may be connected to one end, and the shield conductor 11b1 may be connected to the ground wire lead fitting 25 via the shield conductor connection conductor 60.

図１４に示した例では、接地線引出金具２５の一端の端面に開口するようにして接地線引出金具２５に形成された孔（有底の孔）内にシールド導体接続導体６０の一端を挿入して該孔内でシールド導体接続導体６０が接地線引出金具２５に電気的に接続されている。そして、電力ケーブルの遮蔽層から導出されたシールド導体１１b1が、圧着スリーブ６１やろう付けなどによりシールド導体接続導体６０に接続され、シールド導体１１b1がシールド導体接続導体６０を通して接地線引出金具２５に電気的に接続されている。   In the example shown in FIG. 14, one end of the shield conductor connecting conductor 60 is inserted into a hole (bottomed hole) formed in the grounding wire lead-out fitting 25 so as to open at one end face of the grounding wire lead-out fitting 25. The shield conductor connection conductor 60 is electrically connected to the ground wire lead fitting 25 in the hole. The shield conductor 11b1 derived from the shield layer of the power cable is connected to the shield conductor connection conductor 60 by a crimp sleeve 61 or brazing, and the shield conductor 11b1 is electrically connected to the ground wire lead fitting 25 through the shield conductor connection conductor 60. Connected.

図１５は、本発明の更に他の実施形態を示したもので、この実施形態では、接地線引出金具２５の他端寄りの一部の肉厚を薄くすることにより接地線引出金具２５の他端側に凸面２５Ｂの頂部に対して段差を有する接地線接続導体接続部（図２に示されたシールド導体接続部２５Ｃと同様のもの）２５Ｃ′が形成されている。接地線接続導体接続部２５Ｃ′には、図２に示されたシールド導体１１b1とシールド導体接続部２５Ｃとの接続構造と同様の構造で、接地線接続導体２８が接続されている。   FIG. 15 shows still another embodiment of the present invention. In this embodiment, the thickness of a part of the ground wire lead fitting 25 near the other end is made thinner so that the ground wire lead fitting 25 is further removed. A ground line connecting conductor connecting portion (similar to the shield conductor connecting portion 25C shown in FIG. 2) 25C ′ having a step with respect to the top of the convex surface 25B is formed on the end side. A ground line connection conductor 28 is connected to the ground line connection conductor connection portion 25C ′ in the same structure as the connection structure between the shield conductor 11b1 and the shield conductor connection portion 25C shown in FIG.

上記の実施形態では、接地線引出金具が中実に形成されているが、本発明は、接地線引出金具２５を中実に形成する場合に限定されるものではなく、接地線引出金具２５は中空に形成されていても良い。中空の接地線引出金具２５は、例えば、凸面側の部分を構成する部材及び凹面側の部分を構成する部材をそれぞれ板状の部材を湾曲させることにより製作するとともに、両端の壁部を構成する部材を板状部材を打ち抜くことにより製作して、これらの部材を組み合わせて溶接やろう付けなどにより接合することにより得ることができる。   In the above embodiment, the ground wire lead fitting is solid, but the present invention is not limited to the case where the ground wire lead fitting 25 is solid, and the ground wire lead fitting 25 is hollow. It may be formed. The hollow ground wire lead fitting 25 is formed, for example, by bending a plate-shaped member into a member constituting the convex portion and a member constituting the concave portion, and constitutes the wall portions at both ends. The members can be manufactured by punching plate-like members, and these members can be combined and joined by welding or brazing.

またパイプ状の金属部材をプレス加工等により変形させることにより凹面２５Ａ及び凸面２５Ｂを有する中空の金属部材を製造して、この中空金属部材の両端の開口部を閉じる端板を該中空部材の両端に溶接又はろう付け等により接合することによっても中空の接地線引出金具を得ることができる。   Further, a hollow metal member having a concave surface 25A and a convex surface 25B is manufactured by deforming a pipe-shaped metal member by pressing or the like, and end plates for closing the openings at both ends of the hollow metal member are formed at both ends of the hollow member. It is also possible to obtain a hollow ground wire lead metal fitting by joining to the metal by welding or brazing.

更に、凹面及び凸面を有する長尺の中空部材を押出し加工により製造した後、この長尺の中空部材を適当な長さにカットすることにより凹面２５Ａ及び凸面２５Ｂを有する必要長さの中空金属部材を得て、この金属部材の両端の開口部を閉じる端板を該金属部材の両端に溶接又はろう付け等により接合することによっても中空の接地線引出金具を得ることができる。   Further, after a long hollow member having a concave surface and a convex surface is manufactured by extrusion processing, the long hollow member is cut into an appropriate length, and thereby a hollow metal member having a necessary length having a concave surface 25A and a convex surface 25B. A hollow ground wire lead metal fitting can be obtained also by joining end plates that close the openings at both ends of the metal member to both ends of the metal member by welding or brazing.

接地線引出金具２５を中空に構成する場合、電力ケーブルの絶縁シースから引き出されたシールド導体と接地線引出金具２５との接続構造及び接地線接続導体２８と接地線引出金具２５との接続構造は任意であるが、シールド導体と接地線引出金具２５及び接地線接続導体２８と接地線引出金具２５をそれぞれ接続した状態で、接地線引出金具の中空部内が外部に対して閉鎖されるように、上記各接続構造を構成するのが好ましい。   When the ground wire lead fitting 25 is configured to be hollow, the connection structure between the shield conductor drawn from the insulation sheath of the power cable and the ground wire lead fitting 25 and the connection structure between the ground line connection conductor 28 and the ground wire lead fitting 25 are as follows. Optionally, in a state where the shield conductor and the ground wire lead fitting 25 and the ground wire connection conductor 28 and the ground wire lead fitting 25 are connected, the hollow portion of the ground wire lead fitting is closed to the outside. It is preferable to constitute each of the connection structures.

図１６及び図１７は、中空に形成された接地線引出金具２５を用いた実施形態を示している。本実施形態では、円筒状のパイプを中空部材として用い、このパイプの周壁部の一部を径方向の内側に押し込むようにプレス加工することにより接地線引出金具２５を形成している。本実施形態で用いる接地線引出金具２５は、電力ケーブル１１の絶縁シース１１ａの外周に沿うように湾曲した凹面２５Ａ（この例では円筒面）を外面に有する断面円弧状の遮水壁部２５Ｅと、遮水壁部と反対側にあって外面が凸面２５Ｂとなっている外周側壁部２５Ｆとを一体に有する中空の金属部材と、この金属部材の長手方向の両端で該金属部材の中空部を閉じる端部材２５Ｇ及び２５Ｈとからなっていて、横断面がほぼ三日月形を呈するように形成されている。シールド導体１１b1は、接地線引出金具２５の長手方向の一端側の端部材２５Ｇに電気的に接続され、接地線引出金具２５の長手方向の他端側の端部材２５Ｈに接地線接続導体２８の一端が電気的に接続されている。遮水壁部２５Ｅの凹面２５Ａの軸線方向長さＬ1は、該遮水壁部に遮水機能を持たせるために必要な長さに設定されている。また遮水壁部２５Ｅの厚さは、遮水性、電気的な特性及び機械的な強度を考慮して適宜に設定される。なお図１６及び図１７に示された接地線引出金具は、押出し加工により製造することもできる。   FIG.16 and FIG.17 has shown embodiment using the ground wire drawing | extracting metal fitting 25 formed hollow. In the present embodiment, the ground wire lead fitting 25 is formed by using a cylindrical pipe as a hollow member and performing press processing so that a part of the peripheral wall portion of the pipe is pushed inward in the radial direction. The ground wire lead fitting 25 used in the present embodiment includes a water shielding wall portion 25E having a circular arc cross section having a concave surface 25A (cylindrical surface in this example) curved along the outer periphery of the insulating sheath 11a of the power cable 11 on the outer surface. A hollow metal member integrally having an outer peripheral side wall portion 25F on the opposite side of the water-impervious wall portion and having a convex surface 25B on the outer surface, and a hollow portion of the metal member at both longitudinal ends of the metal member. It consists of closing end members 25G and 25H, and is formed so that the cross section has a substantially crescent shape. The shield conductor 11b1 is electrically connected to the end member 25G on one end side in the longitudinal direction of the ground wire lead fitting 25, and the ground line connecting conductor 28 is connected to the end member 25H on the other end side in the longitudinal direction of the ground wire lead fitting 25. One end is electrically connected. The length L1 in the axial direction of the concave surface 25A of the water shielding wall 25E is set to a length necessary for giving the water shielding wall a water shielding function. Further, the thickness of the water shielding wall 25E is appropriately set in consideration of water shielding, electrical characteristics, and mechanical strength. Note that the ground wire lead fitting shown in FIGS. 16 and 17 can also be manufactured by extrusion.

接地線引出金具２５は、その遮水壁部２５Ｅの凹面２５Ａを、柔軟性を有するシール材からなる絶縁シート３５を介して電力ケーブル１１の絶縁シースの外周に当接させた状態で配置されている。図１７に示されたように、電力ケーブルの遮蔽層から引き出されたシールド導体１１b1の先端部が、接地線引出金具２５の一端２５ａ側の開口部を閉じる端部材２５Ｇに設けられた孔に挿入されて、該シールド導体１１b1が端部材２５Ｇに溶接やろう付け等により接続されている。また接地線接続導体２８の一端が、接地線引出金具２５の他端２５ｂ側の開口部を閉じる端部材２５Ｈに設けられた孔内に挿入されて、該接地線接続導体２８が端部材２５Ｈに溶接やろう付け等により接続されている。なお、端部材２５Ｈには接地線１５を直接接続しても良い。   The ground wire lead fitting 25 is disposed in a state where the concave surface 25A of the water shielding wall portion 25E is in contact with the outer periphery of the insulating sheath of the power cable 11 via the insulating sheet 35 made of a flexible sealing material. Yes. As shown in FIG. 17, the tip of the shield conductor 11b1 drawn out from the shielding layer of the power cable is inserted into the hole provided in the end member 25G that closes the opening on the one end 25a side of the ground wire lead fitting 25. The shield conductor 11b1 is connected to the end member 25G by welding or brazing. Also, one end of the ground line connection conductor 28 is inserted into a hole provided in the end member 25H that closes the opening on the other end 25b side of the ground line lead fitting 25, and the ground line connection conductor 28 is connected to the end member 25H. Connected by welding or brazing. Note that the ground wire 15 may be directly connected to the end member 25H.

図１８は本発明の更に他の実施形態の要部を示したものである。この例で用いる接地線引出金具２５は、凹面２５Ａを外面に有する遮水壁部２５Ｅと、外面が凸面２５Ｂとなっている外周側壁部２５Ｆとを一体に有する中空金属部材からなっている。この接地線引出金具は、図１６及び図１７に示した実施形態で用いた接地線引出金具２５から端部材２５Ｇ及び２５Ｈを省略したものに相当し、その横断面は三日月形を呈している。本実施形態では、プレス成形又は押出し成形により形成された中空の接地線引出金具２５の軸線方向の一端２５ａ及び他端２５ｂの開口部の内側にシールド導体１１b1及び接地線接続導体２８の端部を挿入した状態で、接地線引出金具２５の内周側の遮水壁部２５Ｅの凹面２５Ａの形状を変えることなく、接地線引出金具２５の一端２５ａ寄りの部分及び他端２５ｂ寄りの部分を径方向に押し潰して、接地線引出金具の一端２５ａ及び他端２５ｂにそれぞれ圧着接続部２５Ｉ及び２５Ｊを形成し、これらの圧着接続部２５Ｉ及び２５Ｊによりそれぞれシールド導体１１b1及び接地線接続導体２８を接地線引出金具２５に電気的に接続している。   FIG. 18 shows a main part of still another embodiment of the present invention. The ground wire lead fitting 25 used in this example is made of a hollow metal member integrally including a water shielding wall portion 25E having a concave surface 25A on the outer surface and an outer peripheral side wall portion 25F having an outer surface serving as a convex surface 25B. This ground wire lead fitting corresponds to the ground wire lead fitting 25 used in the embodiment shown in FIGS. 16 and 17 with the end members 25G and 25H omitted, and its cross section has a crescent shape. In the present embodiment, the ends of the shield conductor 11b1 and the ground wire connecting conductor 28 are disposed inside the openings of the one end 25a and the other end 25b in the axial direction of the hollow ground wire lead fitting 25 formed by press molding or extrusion molding. In the inserted state, without changing the shape of the concave surface 25A of the water shielding wall 25E on the inner peripheral side of the grounding wire lead-out fitting 25, the portion near the one end 25a and the portion near the other end 25b of the grounding wire lead-out fitting 25 have a diameter. The crimping connection portions 25I and 25J are formed at the one end 25a and the other end 25b of the ground wire lead fitting, respectively, and the shield conductor 11b1 and the ground wire connection conductor 28 are grounded by the crimp connection portions 25I and 25J, respectively. The wire drawing metal fitting 25 is electrically connected.

接地線引出金具２５の内周側の遮水壁部２５Ｅの凹面２５Ａの形状を変えることなく、接地線引出金具２５の一端２５ａ寄りの部分及び他端２５ｂ寄りの部分を径方向に押し潰して、圧着接続部２５Ｉ及び２５Ｊを形成するには、適用する電力ケーブル１１の半径に、柔軟性を有するシール材からなるシート３５により形成されるシール層Ｓの厚みを加えた大きさの半径を有する円筒状の金属管を凹面２５Ａに当接させた状態で、接地線引出金具の一端寄りの部分及び他端寄りの部分で外周側壁部２５Ｆを該金属管側に押し潰すようにすれば良い。なお、接地線を、直接、接地線接続金具２５に接続しても良い。またシールド導体１１b1を、シールド導体接続導体を介して金具２５に接続しても良い。   Without changing the shape of the concave surface 25A of the water-impervious wall 25E on the inner peripheral side of the ground wire drawing metal fitting 25, the portion near the one end 25a and the portion near the other end 25b of the ground wire drawing metal fitting 25 are crushed in the radial direction. In order to form the crimp connection portions 25I and 25J, the radius of the power cable 11 to be applied has a radius that is the sum of the thickness of the seal layer S formed by the sheet 35 made of a flexible sealing material. In a state where the cylindrical metal tube is in contact with the concave surface 25A, the outer peripheral side wall portion 25F may be crushed toward the metal tube side at a portion near one end and a portion near the other end of the ground wire lead fitting. The ground wire may be directly connected to the ground wire connection fitting 25. The shield conductor 11b1 may be connected to the metal fitting 25 via the shield conductor connecting conductor.

図１９は本発明の更に他の実施形態の要部を示したものである。この例でも、プレス成形又は押出し成形により図１６に示したものと同様の横断面形状を有するように形成された中空金属部材により接地線引出金具２５が構成されている。本実施形態では、接地線引出金具２５の軸線方向の一端２５ａ及び他端２５ｂの開口部の内側にシールド導体１１b1及び接地線接続導体２８の端部を挿入した状態で、接地線引出金具２５の一端２５ａ寄りの部分及び他端２５ｂ寄りの部分のそれぞれの全体を押し潰して、圧着接続部２５Ｉ及び２５Ｊを形成し、これらの圧着接続部２５Ｉ及び２５Ｊをそれぞれシールド導体１１b1及び接地線接続導体２８に圧着することにより、シールド導体１１b1及び接地線接続導体２８をそれぞれ接地線引出金具２５に電気的に接続している。   FIG. 19 shows a main part of still another embodiment of the present invention. Also in this example, the ground wire lead fitting 25 is constituted by a hollow metal member formed to have a cross-sectional shape similar to that shown in FIG. 16 by press molding or extrusion molding. In the present embodiment, the ground wire lead metal fitting 25 is connected to the ground wire lead metal fitting 25 in a state where the end portions of the shield conductor 11b1 and the ground wire connection conductor 28 are inserted inside the openings of the one end 25a and the other end 25b in the axial direction of the ground wire lead metal fitting 25. The whole of the portion near the one end 25a and the portion near the other end 25b is crushed to form the crimp connection portions 25I and 25J, and these crimp connection portions 25I and 25J are respectively connected to the shield conductor 11b1 and the ground line connection conductor 28. The shield conductor 11b1 and the ground line connection conductor 28 are electrically connected to the ground line lead fitting 25, respectively.

この実施形態では、接地線引出金具２５の一端２５ａ寄りの部分及び他端２５ｂ寄りの部分のそれぞれの全体を押し潰して、圧着接続部２５Ｉ及び２５Ｊを形成しているため、接地線引出金具２５の圧着接続部２５Ｉ及び２５Ｊが形成された部分には、電力ケーブルの絶縁シースにシール材を介して当接される凹面２５Ａが形成されない。この場合は、接地線引出金具２５の圧着接続部２５Ｉ及び２５Ｊが形成された部分以外の部分に形成された凹面２５Ａが、遮水壁部２５Ｅに遮水機能を持たせるために必要な軸線方向長さＬ1を有するように接地線引出金具２５の長さを設定しておく。   In this embodiment, the entire portion of the ground wire lead fitting 25 near the one end 25a and the portion near the other end 25b are crushed to form the crimp connection portions 25I and 25J. In the portion where the crimping connection portions 25I and 25J are formed, the concave surface 25A that is in contact with the insulating sheath of the power cable via the sealing material is not formed. In this case, the concave surface 25A formed in a portion other than the portion where the crimp connection portions 25I and 25J of the ground wire lead fitting 25 are formed has an axial direction necessary for the water shielding wall portion 25E to have a water shielding function. The length of the ground wire lead fitting 25 is set so as to have the length L1.

上記の例では、ケーブル接続部により接続されている電力ケーブルから接地線を引き出す場合を例にとったが、ケーブル接続部以外の部分で電力ケーブルの遮蔽層から外部に接地線を引き出す場合にも本発明を適用することができる。   In the above example, the case where the ground wire is pulled out from the power cable connected by the cable connection portion is taken as an example, but the case where the ground wire is pulled outside from the shielding layer of the power cable at a portion other than the cable connection portion is also taken. The present invention can be applied.

上記の各実施形態では、接地線引出金具２５の凹面２５Ａを電力ケーブル１１の絶縁シース１１ａの外周に柔軟性を有するシール材からなるシート３５を介して当接させるようにしたが、接地線引出金具２５の凹面２５Ａは、遮水機能を有するシール層を介して電力ケーブル１１の絶縁シース１１ａの外周に当接した状態で設置されればよく、本発明は、上記実施形態のように柔軟性を有するシール材からなるシート３５を用いる場合に限定されるものではない。   In each of the above embodiments, the concave surface 25A of the ground wire lead fitting 25 is brought into contact with the outer periphery of the insulating sheath 11a of the power cable 11 via the sheet 35 made of a flexible sealing material. The concave surface 25A of the metal fitting 25 may be installed in a state in which the concave surface 25A is in contact with the outer periphery of the insulating sheath 11a of the power cable 11 through a seal layer having a water shielding function, and the present invention is flexible as in the above embodiment. It is not limited to the case where the sheet 35 made of the sealing material having

上記の実施形態では、接地線引出金具２５の凹面２５Ａと電力ケーブル１１の絶縁シース１１ａの外周との間に介在させるシール層Ｓを、ある程度の厚みを有する絶縁パテシートにより形成するとしたが、シール層は、接着剤のような、塗布により薄く施される材料により形成されても良い。   In the above embodiment, the sealing layer S interposed between the concave surface 25A of the ground wire lead fitting 25 and the outer periphery of the insulating sheath 11a of the power cable 11 is formed of an insulating putty sheet having a certain thickness. May be formed of a material that is thinly applied by application, such as an adhesive.

本発明に係わる電力ケーブル接続部の要部の構成例を概略的に示した斜視図である。It is the perspective view which showed schematically the example of a structure of the principal part of the power cable connection part concerning this invention. 本発明の一実施形態の要部の構成を拡大して示した縦断面図である。It is the longitudinal cross-sectional view which expanded and showed the structure of the principal part of one Embodiment of this invention. 図２に示した接地線引出部から分岐管ユニット及び接地線接続導体を外して、接地線引出部の部分を同図のIII−III線に沿って断面して示した断面図である。It is sectional drawing which removed the branch pipe unit and the grounding wire connection conductor from the grounding wire extraction part shown in FIG. 2, and showed the part of the grounding wire extraction part along the III-III line of the same figure. （Ａ）は接地線引出金具の要部の構成を示した縦断面図、（Ｂ）は（Ａ）のＢ−Ｂ線断面図である。(A) is the longitudinal cross-sectional view which showed the structure of the principal part of a grounding wire drawing | extracting metal fitting, (B) is the BB sectional drawing of (A). （Ａ）及び（Ｂ）は、接地線引出金具の凹面の曲率半径の設定の仕方を説明するための縦断面図である。(A) And (B) is a longitudinal cross-sectional view for demonstrating the setting method of the curvature radius of the concave surface of a grounding wire drawer | drawing metal fitting. （Ａ）は接地線引出金具を電力ケーブルの上に設置するに先立って電力ケーブルの上にシール層を形成した状態を示した斜視図、（Ｂ）及び（Ｃ）はそれぞれ電力ケーブルの上にシール層を介して接地線引出金具を載せた状態を示す上面図及び側面図である。(A) is a perspective view showing a state in which a sealing layer is formed on the power cable prior to installing the ground wire lead fitting on the power cable, and (B) and (C) are respectively on the power cable. It is the upper side figure and side view which show the state which mounted | wore the grounding wire drawing | extracting metal fitting through the seal layer. （Ａ）及び（Ｂ）はそれぞれ、電力ケーブルの上にシール層を介して載せられた接地線引出金具の幅方向の両端とシール層とに跨ってシール用テープを貼り付けた状態を示した斜視図及び縦断面図である。(A) and (B) respectively show a state in which a sealing tape is applied across both ends in the width direction of the ground wire lead fitting placed on the power cable via the seal layer and the seal layer. It is a perspective view and a longitudinal sectional view. （Ａ）ないし（Ｃ）はそれぞれ、電力ケーブルの上にシール層を介して載せられた接地線引出金具の長手方向の両端の端面とシール層とに跨ってシール用テープを貼り付けた状態を示した斜視図、縦断面図及び側面図である。(A) thru | or (C) each have the state which affixed the tape for sealing over the end surface of the both ends of the longitudinal direction of the grounding wire | pickup fitting mounted on the power cable via the seal layer, and the seal layer It is the shown perspective view, longitudinal cross-sectional view, and side view. （Ａ）は本発明の実施形態において接地線引出金具の凸面を覆う防食層の両端の端縁を面取りした状態を示した要部拡大断面図、（Ｂ）は接地線引出金具の凸面を覆う防食層の両端の端縁を面取りする前の状態を示した要部拡大断面図である。(A) is a principal part expanded sectional view which showed the state which chamfered the edge of the both ends of the anticorrosion layer which covers the convex surface of a grounding conductor in embodiment of this invention, (B) covers the convex surface of a grounding conductor. It is a principal part expanded sectional view which showed the state before chamfering the edge of both ends of a corrosion prevention layer. 電力ケーブルの上にシール層を介して載せられてシール用テープによりシール層との間がシールされた接地線引出金具を、電力ケーブルとともに囲むようにシール用テープを巻き付けた状態を示した側面図である。Side view showing a state in which the sealing tape is wound around the power cable so that the grounding wire fitting placed on the power cable through the sealing layer and sealed with the sealing tape is surrounded with the power cable. It is. ケーブル接続部本体の構成例を示した半部断面図である。It is half sectional drawing which showed the structural example of the cable connection part main body. （Ａ）は本発明の実施形態で用いる分岐管ユニットの縦断面図である。（Ｂ）は同ユニットの正面図である。(A) is a longitudinal cross-sectional view of the branch pipe unit used in the embodiment of the present invention. (B) is a front view of the unit. 本発明の他の実施形態の要部の構成を示した縦断面図である。It is the longitudinal cross-sectional view which showed the structure of the principal part of other embodiment of this invention. 本発明の各実施形態で採用し得る接地線引出金具とシールド線との接続構造の変形例を示した要部の断面図である。It is sectional drawing of the principal part which showed the modification of the connection structure of the grounding wire extraction metal fitting and shield wire which can be employ | adopted by each embodiment of this invention. 本発明の各実施形態で採用し得る接地線引出金具とシールド線との接続構造の他の変形例を示した要部の断面図である。It is sectional drawing of the principal part which showed the other modification of the connection structure of the grounding wire extraction metal fitting and shield wire which can be employ | adopted by each embodiment of this invention. 本発明の更に他の実施形態の要部を示した横断面図である。It is the cross-sectional view which showed the principal part of other embodiment of this invention. 同実施形態の要部の縦断面図である。It is a longitudinal cross-sectional view of the principal part of the embodiment. 本発明の更に他の実施形態の要部を示した縦断面図である。It is the longitudinal cross-sectional view which showed the principal part of other embodiment of this invention. 本発明の更に他の実施形態の要部を示した縦断面図である。It is the longitudinal cross-sectional view which showed the principal part of other embodiment of this invention. 従来の接地線引出部の構成を概略的に示した端面図である。It is the end elevation which showed roughly the structure of the conventional ground wire extraction part. 図２０の接地線引出部に用いられている接地線と金属板とを示した正面図である。It is the front view which showed the ground wire and metal plate which are used for the ground wire drawer part of FIG.

符号の説明Explanation of symbols

１０ 電力ケーブル接続部
１１ 接地線が引き出される特定の電力ケーブル
１１ａ 絶縁シース
１１b1 シールド導体
１１ｄ 絶縁体
１１ｅ 導体
１１ｆ シールド導体引出部
１２ 他の電力ケーブル
１２ｄ 絶縁体
１２ｅ 導体
１３ ケーブル接続部本体
１５ 接地線
１６ 接地線引出部
１７ 保護外装部
１７ａ 被覆層
２０ 導体接続部
２１ ゴムユニット
２１ａ 補強絶縁層
２１ｂ 内部半導電層
２１ｃ 外部半導電層
２１ｄ，２１ｅ ストレスコーン
２３ ロールスプリング
２５ 接地線引出金具
２５ａ 接地線引出金具の一端
２５ｂ 接地線引出金具の他端
２５Ａ 凹面
２５Ｂ 凸面
２５Ｃ シールド導体接続部
２５Ｄ 孔
２５Ｅ 遮水壁部
２５Ｆ 外周側壁部
２５Ｇ，２５Ｈ 端部材
２５Ｉ 圧着接続部
２５Ｊ 圧着接続部
２６ 端子金具
２７ ボルト
２８ 接地線接続導体
２９ 圧着端子金具
３０ 端子金具
３１ ボルト
３２ ナット
３３ 防食層
３５ シール材からなる絶縁シート
３６ シール用テープ
３７ シール用テープ
３８ シール用テープ
Ｓ シール層
４０ 分岐管ユニット
４１ 筒部
４２ 第１の分岐管部
４３ 第２の分岐管部
４６ 防水層
４７ 防水層
４８ 絶縁被覆
５０ コンパウンド
６０ シールド導体接続導体 DESCRIPTION OF SYMBOLS 10 Power cable connection part 11 Specific power cable from which a ground line is drawn out 11a Insulation sheath 11b1 Shield conductor 11d Insulator 11e Conductor 11f Shield conductor lead-out part 12 Other power cable 12d Insulator 12e Conductor 13 Cable connection part body 15 Ground line 16 Ground wire lead-out part 17 Protective exterior part 17a Cover layer 20 Conductor connection part 21 Rubber unit 21a Reinforcement insulating layer 21b Internal semiconductive layer 21c External semiconductive layer 21d, 21e Stress cone 23 Roll spring 25 Ground wire lead fitting 25a Ground wire lead fitting One end of 25b The other end of the ground wire lead fitting 25A Concave surface 25B Convex surface 25C Shield conductor connection portion 25D Hole 25E Water shielding wall portion 25F Outer peripheral side wall portion 25G, 25H End member 25I Crimp connection portion 25J Crimp connection portion 26 Terminal fitting 27 Bolt 2 Ground wire connection conductor 29 Crimp terminal fitting 30 Terminal fitting 31 Bolt 32 Nut 33 Anticorrosion layer 35 Insulating sheet made of sealing material 36 Sealing tape 37 Sealing tape 38 Sealing tape S Sealing layer 40 Branch pipe unit 41 Tube portion 42 First Branch pipe part 43 Second branch pipe part 46 Waterproof layer 47 Waterproof layer 48 Insulation coating 50 Compound 60 Shield conductor connecting conductor

Claims (16)

電力ケーブルの遮蔽層から導出されたシールド導体に接地線を電気的に接続して該接地線を外部に引き出す接地線引出部において、
前記電力ケーブルの軸線に沿う方向に一定の長さを有し、前記電力ケーブルの絶縁シースの外周に沿うように湾曲した凹面を外面の一部に有するとともに、該凹面の反対側の部分の外面が湾曲した凸面となっている接地線引出金具が、その長手方向の一端を前記電力ケーブルのシールド導体導出部に向け、かつ前記凹面を前記電力ケーブルの絶縁シースの外周にシール層を介して当接させた状態で前記電力ケーブルのシールド導体導出部付近に配置され、
前記電力ケーブルの遮蔽層から導出されたシールド導体が前記接地線引出金具の一端に電気的に接続され、
前記接地線引出金具の外面の少なくとも一部と、前記電力ケーブルのシールド導体導出部付近の外面とを含む要被覆部を一括して被覆する被覆層が設けられて、該被覆層と前記接地線引出金具とにより、前記電力ケーブルのシールド導体導出部側の領域と前記接地線が引き出される側の領域との間の遮水が図られ、
前記接地線は前記接地線引出金具の他端側に電気的に接続されること、
を特徴とする接地線引出部。 In the ground wire lead-out portion that electrically connects the ground wire to the shield conductor derived from the shield layer of the power cable and draws the ground wire to the outside,
The power cable has a constant length in a direction along the axis of the power cable, and has a concave surface curved along the outer periphery of the insulating sheath of the power cable as a part of the outer surface, and an outer surface of a portion opposite to the concave surface The ground wire lead fitting having a curved surface is directed with one end in the longitudinal direction thereof toward the shield conductor lead-out portion of the power cable and the concave surface against the outer periphery of the insulating sheath of the power cable via a seal layer. Arranged in the vicinity of the shield conductor lead-out portion of the power cable in a state of contact,
A shield conductor derived from the shield layer of the power cable is electrically connected to one end of the ground wire lead fitting,
A covering layer is provided to collectively cover a required covering portion including at least a part of the outer surface of the ground wire lead fitting and the outer surface near the shield conductor lead-out portion of the power cable, and the covering layer and the ground wire With the draw-out fitting, water shielding is achieved between the area on the shield conductor lead-out side of the power cable and the area on the side from which the ground wire is drawn out,
The ground wire is electrically connected to the other end of the ground wire lead fitting;
Ground wire lead-out part characterized by 前記シール層は、柔軟性及び（又は）弾性を有するシール材からなるシートからなっている請求項１に記載の接地線引出部。   The grounding wire lead-out portion according to claim 1, wherein the sealing layer is made of a sheet made of a sealing material having flexibility and / or elasticity. 前記シール層は、前記接地線引出金具の前記凹面を取り囲む周縁部から外側にはみ出す大きさを有し、
前記接地線引出金具の前記周縁部の全体に亘って、かつ前記接地線引出金具と前記シール層の表面との間に跨って、シール用テープが貼り付けられて前記接地線引出金具と前記シール層の表面との間が液密にシールされていることを特徴とする請求項１又は２に記載の接地線引出部。 The seal layer has a size that protrudes outward from a peripheral edge that surrounds the concave surface of the ground wire lead fitting,
A sealing tape is affixed over the entire peripheral edge of the ground wire lead fitting and between the ground wire lead fitting and the surface of the seal layer, and the ground wire lead fitting and the seal are attached. The ground wire lead-out portion according to claim 1 or 2, wherein a space between the surfaces of the layers is liquid-tightly sealed. 前記接地線引出金具の凸面を覆う防食層が形成されていることを特徴とする請求項１，２又は３に記載の接地線引出部。   The grounding wire lead-out portion according to claim 1, 2 or 3, wherein an anticorrosion layer covering the convex surface of the grounding wire lead-out fitting is formed. 前記接地線引出金具の凹面と凸面との境界部で前記接地線引出金具の長手方向に沿って伸びる前記防食層の端縁部は、先端側ほど薄くなるように斜めに面取りされていること、
を特徴とする請求項４に記載の接地線引出部。 The edge portion of the anticorrosion layer extending along the longitudinal direction of the ground wire lead fitting at the boundary between the concave surface and the convex surface of the ground wire lead fitting is obliquely chamfered so as to become thinner toward the tip side;
The ground wire lead-out part according to claim 4 characterized by things. 前記シール層は、接着性を有するシール材からなり、
前記接地線引出金具は、良導電性を有する金属からなる鋳造品からなっていて、
前記接地線引出金具の凹面は鋳物肌のままとされている請求項１ないし５のいずれか一つに記載の接地線引出部。 The sealing layer is made of a sealing material having adhesiveness,
The ground wire lead fitting is made of a casting made of a metal having good conductivity,
The ground wire lead-out portion according to any one of claims 1 to 5, wherein a concave surface of the ground wire lead-out fitting is left as cast skin. 前記接地線引出金具の長手方向の一端寄りの一部の肉厚を薄くすることにより前記接地線引出金具の一端側に前記凸面の頂部に対して段差を有するシールド導体接続部が形成され、該シールド導体接続部に前記電力ケーブルの遮蔽層から導出されたシールド導体が接続されている請求項１ないし６のいずれか一つに記載の接地線引出部。   A shield conductor connection portion having a step with respect to the top of the convex surface is formed on one end side of the ground wire lead metal fitting by reducing the thickness of a portion near one end in the longitudinal direction of the ground wire lead metal fitting, The ground wire lead-out portion according to any one of claims 1 to 6, wherein a shield conductor derived from a shielding layer of the power cable is connected to the shield conductor connection portion. 前記電力ケーブルの遮蔽層から導出されたシールド導体は、前記接地線引出金具の長手方向の一端の端面に開口するようにして前記接地線引出金具に形成された孔を用いて該接地線引出金具に電気的に接続されていることを特徴とする請求項１ないし６のいずれか一つに記載の接地線引出部。   The shield conductor led out from the shield layer of the power cable opens to the end face of one end in the longitudinal direction of the ground wire lead fitting, and uses the hole formed in the ground wire lead fitting to use the ground wire lead fitting. The ground wire lead-out portion according to claim 1, wherein the ground wire lead-out portion is electrically connected to the ground wire. 前記接地線引出金具の長手方向の他端寄りの一部の肉厚を薄くすることにより前記接地線引出金具の他端側に前記凸面の頂部に対して段差を有する接地線接続導体接続部が形成されて、該接地線接続導体接続部に前記接地線が電気的に接続されること、
を特徴とする請求項１ないし８のいずれか一つに記載の接地線引出部。 A ground line connecting conductor connecting portion having a step with respect to the top of the convex surface on the other end side of the ground wire lead metal fitting by thinning a part of the thickness near the other end in the longitudinal direction of the ground wire lead metal fitting. Formed, the ground wire is electrically connected to the ground wire connecting conductor connecting portion,
The grounding wire lead-out part according to any one of claims 1 to 8, wherein 前記接地線引出金具の長手方向の他端の端面に開口するようにして前記接地線引出金具に形成された孔を用いて前記接地線が前記接地線引出金具に電気的に接続されること、
を特徴とする請求項１ないし８のいずれか一つに記載の接地線引出部。 The ground wire is electrically connected to the ground wire lead fitting using a hole formed in the ground wire lead fitting so as to open at the other end face in the longitudinal direction of the ground wire lead fitting;
The grounding wire lead-out part according to any one of claims 1 to 8, wherein 前記接地線引出金具は、前記凹面を外面に有する遮水壁部と、外面が前記凸面となっている外周側壁部とを一体に有する中空の金属部材と該金属部材の長手方向の両端で該金属部材の中空部を閉じる端部材とからなり、
前記シールド導体は、前記接地線引出金具の長手方向の一端側の端部材に電気的に接続され、
前記接地線引出金具の長手方向の他端側の端部材に前記接地線が電気的に接続されること、
を特徴とする請求項１ないし５のいずれか一つに記載の接地線引出部。 The ground wire lead fitting includes a hollow metal member integrally including a water-impervious wall portion having the concave surface on the outer surface and an outer peripheral side wall portion having an outer surface serving as the convex surface, at both ends in the longitudinal direction of the metal member. It consists of an end member that closes the hollow part of the metal member,
The shield conductor is electrically connected to an end member on one end side in the longitudinal direction of the ground wire lead fitting,
The ground wire is electrically connected to an end member on the other end side in the longitudinal direction of the ground wire lead fitting;
The grounding wire lead-out part according to any one of claims 1 to 5 . 前記接地線引出金具は、前記凹面を外面に有する遮水壁部と、外面が前記凸面となっている外周側壁部とを一体に有する中空の金属部材からなり、
前記接地線引出金具の一端寄りの部分が縮小されて管状のシールド導体圧着部が形成され、
前記シールド導体圧着部の内側に前記シールド導体が電気的に接続されていること、
を特徴とする請求項１ないし５のいずれか一つに記載の接地線引出部。 The ground wire lead fitting is made of a hollow metal member integrally having a water shielding wall portion having the concave surface on the outer surface and an outer peripheral side wall portion having the convex surface on the outer surface,
The portion near the one end of the ground wire lead fitting is reduced to form a tubular shield conductor crimping portion,
The shield conductor is electrically connected to the inside of the shield conductor crimping portion;
The grounding wire lead-out part according to any one of claims 1 to 5 . 前記接地線引出金具の他端寄りの部分が縮小されて管状の接地線接続導体圧着部が形成され、
前記接地線接続導体圧着部に前記接地線が電気的に接続されていること、
を特徴とする請求項１２に記載の接地線引出部。 A portion near the other end of the ground wire lead fitting is reduced to form a tubular ground wire connection conductor crimping portion,
The ground wire is electrically connected to the ground wire connecting conductor crimping portion;
The ground wire lead-out part according to claim 12 characterized by things. 前記被覆層で被覆された前記接地線引出金具と電力ケーブルとを一括して収容し得る形状及び大きさを有する筒部の底部から前記電力ケーブルを貫通させ得る大きさの第１の分岐管部と前記接地線又は該接地線を前記接地線引出金具に接続する接続導体を貫通させ得る大きさの第２の分岐管部とを突出させた構造を有する分岐管ユニットが設けられて、前記筒部内に前記接地線引出金具を電力ケーブル及び被覆層の一部とともに収容し、前記電力ケーブルの前記接地線引出金具よりも接地線側に位置する部分を前記第１の分岐管部内を通して外部に導出するとともに、前記接地線又は接続導体を前記第２の分岐管内を通して外部に導出した状態で前記分岐管ユニットが前記電力ケーブルの前記接地線引出金具が配置された部分に装着され、
前記分岐管ユニットの前記筒部と前記被覆層との間の防水を図る防水層と、前記第１の分岐管部とここから導出された電力ケーブルとの間の防水を図る防水層と、前記第２の分岐管部とここから導出された接地線接続導体との間の防水を図る防水層とが形成されていること、
を特徴とする請求項１ないし１３のいずれか一つに記載の接地線引出部。 A first branch pipe portion having a size capable of penetrating the power cable from a bottom portion of a cylindrical portion having a shape and a size capable of collectively housing the ground wire lead fitting and the power cable covered with the covering layer. And a branch pipe unit having a structure in which the ground wire or a second branch pipe portion having a size capable of passing through the connecting conductor connecting the ground wire or the ground wire to the ground wire lead fitting is provided, The ground wire lead fitting is housed together with a part of the power cable and the covering layer in a portion, and a portion of the power cable located on the ground wire side from the ground wire lead fitting is led out to the outside through the first branch pipe portion. In addition, the branch pipe unit is attached to a portion of the power cable where the ground wire lead fitting is disposed in a state in which the ground wire or the connection conductor is led out through the second branch pipe,
A waterproof layer for waterproofing between the tube portion of the branch pipe unit and the covering layer, a waterproof layer for waterproofing between the first branch pipe portion and a power cable derived therefrom, A waterproof layer for waterproofing between the second branch pipe portion and the ground wire connecting conductor derived therefrom is formed;
The grounding wire lead-out part according to any one of claims 1 to 13, wherein 前記被覆層は遮水性を有する収縮チューブにより形成されている請求項１ないし１４のいずれか一つに記載の接地線引出部。   The grounding wire lead-out portion according to any one of claims 1 to 14, wherein the coating layer is formed of a shrinkable tube having a water shielding property. 電力ケーブルを他の電力ケーブルに接続しているケーブル接続部本体と、前記ケーブル接続部本体により接続されている電力ケーブルの遮蔽層から導出されたシールド導体に接地線を電気的に接続して該接地線を外部に引き出す接地線引出部と、前記ケーブル接続部本体と前記接地線引出部とを一括して覆う遮水構造の保護外装部とを備えた電力ケーブル接続部において、
前記接地線引出部は、請求項１ないし１５のいずれか一つに記載された構成を有すること、
を特徴とする電力ケーブル接続部。 A ground wire is electrically connected to a cable connecting portion main body connecting a power cable to another power cable, and a shield conductor derived from a shielding layer of the power cable connected by the cable connecting portion main body. In the power cable connection portion including a ground wire lead portion for pulling out the ground wire to the outside, and a protective exterior portion of a water shielding structure that collectively covers the cable connection portion main body and the ground wire lead portion,
The ground wire lead-out part has the configuration described in any one of claims 1 to 15,
Power cable connection characterized by.
JP2008240434A 2007-09-21 2008-09-19 Ground wire lead-out portion from power cable and power cable connecting portion provided with this ground wire lead-out portion Expired - Fee Related JP5203112B2 (en)

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